Manitowoc | Q210 | Service manual | Manitowoc Q210 Service manual

ICE MACHINES
Q-Model
Service Manual
C
2004 Manitowoc Ice, Inc.
80-1597-3
6/04
Safety Notices
Procedural Notices
As you work on a Q-Series Ice Machine, be sure to pay
close attention to the safety notices in this manual.
Disregarding the notices may lead to serious injury and/
or damage to the ice machine.
As you work on a Q-Series Ice Machine, be sure to read
the procedural notices in this manual. These notices
supply helpful information which may assist you as you
work.
Throughout this manual, you will see the following types
of safety notices:
Throughout this manual, you will see the following types
of procedural notices:
! Warning
PERSONAL INJURY POTENTIAL
Do not operate equipment that has been misused,
abused, neglected, damaged, or altered/modified
from that of original manufactured specifications.
! Warning
Text in a Warning box alerts you to a potential
personal injury situation. Be sure to read the
Warning statement before proceeding, and work
carefully.
Important
Text in an Important box provides you with
information that may help you perform a procedure
more efficiently. Disregarding this information will
not cause damage or injury, but it may slow you
down as you work.
NOTE: Text set off as a Note provides you with simple,
but useful, extra information about the procedure you
are performing.
! Caution
Text in a Caution box alerts you to a situation in
which you could damage the ice machine. Be sure
to read the Caution statement before proceeding,
and work carefully.
We reserve the right to make product improvements at any time.
Specifications and design are subject to change without notice.
Attend A Manitowoc Factory Service School
• Improve Your Service Techniques
• Network with Your Peers
• 4 1/2 Days of Intensive Training on Manitowoc Ice Machines
• Extensive “Hands On” Training on a Variety of Equipment
• Breakfast, Lunch and Hotel Room Included with Tuition
• Contact Your Distributor or Manitowoc Ice, Inc. for Details
OR
• Visit Our Website at www.manitowocice.com for School Dates
MANITOWOC ICE, INC.
2110 South 26th Street P.O. Box 1720
Manitowoc, WI 54221-1720
Phone: (920) 682-0161
Service Fax: (920) 683-7585
Web Site - www.manitowocice.com
© 2003 Manitowoc Ice, Inc.
Litho in U.S.A.
Table of Contents
Section 1
General Information
Model Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Read a Model Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ice Cube Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model/Serial Number Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty Coverage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Labor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Authorized Warranty Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1-1
1-1
1-2
1-3
1-3
1-3
1-3
1-3
1-3
Section 2
Installation Instructions
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ice Machine Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q320/Q370/Q420 Ice Machines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q200 – Q1000 Ice Machines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q1300/Q1600/Q1800 Ice Machines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q1300/Q1600/Q1800 Ice Machines (Cont.) . . . . . . . . . . . . . . . . . . . . . . . . .
Ice Storage Bin Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
S170/S400/S570 Ice Storage Bins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
S320/S420 Ice Storage Bins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
S970 Ice Storage Bins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Condenser Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
JC0495/JC0895/JC1095/JC1395 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
JC1895 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Location of Ice Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stacking Two Ice Machines on a Single Storage Bin . . . . . . . . . . . . . . . . . . . .
Ice Machine Heat of Rejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leveling the Ice Storage Bin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air-Cooled Baffle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse/Circuit Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minimum Circuit Ampacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self-Contained Electrical Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . .
Self Contained Ice Machine
115/1/60 or 208-230/1/60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self Contained Ice Machine
208-230/3/60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self Contained Ice Machine
230/1/50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
For United Kingdom Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Part No. 80-1100-3
2-1
2-1
2-1
2-2
2-2
2-3
2-3
2-3
2-3
2-4
2-4
2-4
2-4
2-5
2-5
2-5
2-6
2-6
2-7
2-7
2-7
2-7
2-7
2-9
2-9
2-9
2-9
2-9
1
Table of Contents (continued)
Remote Electrical Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Ice Machine
With Single Circuit Model Condenser
115/1/60 or 208-230/1/60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Ice Machine
With Single Circuit Model Condenser
208-230/3/60 or 380-415/3/50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Ice Machine
With Single Circuit Model Condenser
230/1/50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Supply and Drain Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Inlet Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Drain Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cooling Tower Applications
(Water-Cooled Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Supply and Drain Line Sizing/Connections . . . . . . . . . . . . . . . . . . . . .
Remote Condenser/Line Set Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Ice Machines
Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Guidelines for Routing Line Sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Calculating Remote Condenser Installation Distances . . . . . . . . . . . . . . . . .
Lengthening or Reducing Line Set Lengths . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting A Line Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Receiver Service Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Ice Machine Usage with Non-Manitowoc Multi-Circuit Condensers .
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Head Pressure Control Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal Condenser Volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Condenser DT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Quick Connect Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Non-Manitowoc Multi-Circuit Condenser Sizing Chart . . . . . . . . . . . . . . . . .
Installation Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Additional Checks for Remote Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-10
2-10
2-10
2-10
2-11
2-11
2-11
2-11
2-11
2-12
2-13
2-13
2-14
2-14
2-15
2-16
2-16
2-16
2-17
2-17
2-17
2-17
2-17
2-17
2-17
2-17
2-18
2-19
2-19
Section 3
Maintenance
Component Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operational Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ice Thickness Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Harvest Sequence Water Purge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning the Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air-Cooled Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water-Cooled Condenser
and Water Regulating Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interior Cleaning and Sanitizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manitowoc’s Patented Cleaning or Sanitizing Technology . . . . . . . . . . . . . .
2
3-1
3-2
3-2
3-2
3-2
3-3
3-3
3-3
3-4
3-5
3-5
3-5
Part No. 80-1100-3
Table of Contents (continued)
AlphaSan“ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sanitizing Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Procedure To Cancel A Cleaning Or
Sanitizing Cycle After It Has Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Cleaning System (AuCS“) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal of Parts For Cleaning/Sanitizing . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Treatment/Filtration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filter Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal from Service/Winterization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self-Contained Air-Cooled Ice Machines . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water-Cooled Ice Machines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Ice Machines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AuCS“ Accessory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-5
3-6
3-7
3-7
3-8
3-9
3-14
3-14
3-14
3-15
3-15
3-15
3-15
3-15
3-15
Section 4
Ice Machine Sequence of Operation
Self-Contained Air- and Water-Cooled
Q200/Q280/Q320/Q370/Q420/Q450/Q600/Q800/Q1000/Q1300/Q1600/Q1800 .
Initial Start-Up or Start-Up After Automatic Shut-Off . . . . . . . . . . . . . . . . . . .
Freeze Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Harvest Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Shut-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote
Q450/Q600/Q800/Q1000/Q1300/Q1600/Q1800 . . . . . . . . . . . . . . . . . . . . . . . . . .
Initial Start-Up or Start-Up After Automatic Shut-Off . . . . . . . . . . . . . . . . . . .
Freeze Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Harvest Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Shut-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-1
4-1
4-1
4-2
4-2
4-3
4-3
4-3
4-4
4-4
Section 5
Water System Ice Making Sequence of Operation
Initial Start-Up or Start-Up After Automatic Shut-Off . . . . . . . . . . . . . . . . . . .
Freeze Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Inlet Valve Safety Shut-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Harvest Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Shut-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-1
5-1
5-1
5-2
5-2
Energized Parts Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self-Contained Air- And Water-Cooled Models . . . . . . . . . . . . . . . . . . . . . .
1. Initial Start-Up or Start-Up After Automatic Shut-Off . . . . . . . . . . . . . . . . .
Remote Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. Initial Start-Up or Start-Up After Automatic Shut-Off . . . . . . . . . . . . . . . . .
Wiring Diagram Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self-Contained Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1
6-1
6-1
6-2
6-2
6-3
6-3
6-10
Section 6
Electrical System
Part No. 80-1100-3
3
Table of Contents (continued)
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Diagram Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q200/Q280/Q320 - Self Contained - 1 Phase With Terminal Board . . . . . . .
Q280/Q370 - Self Contained - 1 Phase Without Terminal Board . . . . . . . . .
Q320 - Self Contained - 1 Phase Without Terminal Board . . . . . . . . . . . . . .
Q420/Q450/Q600/Q800/Q1000 - Self Contained 1 Phase With Terminal Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q420/Q450/Q600/Q800/Q1000 - Self Contained 1 Phase Without Terminal Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q800/Q1000 - Self Contained - 3 Phase With Terminal Board . . . . . . . . . . .
Q800/Q1000 - Self Contained - 3 Phase Without Terminal Board . . . . . . . .
Q1300/Q1800 - Self Contained - 1 Phase With Terminal Board . . . . . . . . . .
Q1300/Q1600/Q1800 - Self Contained - 1 Phase Without Terminal Board .
Q1300/Q1800 - Self Contained - 3 Phase With Terminal Board . . . . . . . . . .
Q1300/Q1600/Q1800 - Self Contained - 3 Phase Without Terminal Board .
Q450/Q600/Q800/Q1000 - Remote - 1 Phase With Terminal Board . . . . . .
Q450/Q600/Q800/Q1000 - Remote - 1 Phase Without Terminal Board . . . .
Q800/Q1000 -Remote - 3 Phase With Terminal Board . . . . . . . . . . . . . . . . .
Q800/Q1000 -Remote - 3 Phase Without Terminal Board . . . . . . . . . . . . . .
Q1300/Q1800 - Remote - 1 Phase With Terminal Board . . . . . . . . . . . . . . .
Q1300/Q1600/Q1800 - Remote - 1 Phase Without Terminal Board . . . . . . .
Q1300/Q1800 - Remote - 3 Phase With Terminal Board . . . . . . . . . . . . . . .
Q1300/Q1600/Q1800 - Remote - 3 Phase Without Terminal Board . . . . . . .
Component Specifications and Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bin Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compressor Electrical Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PTCR Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ICE/OFF/CLEAN Toggle Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Board Relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ice Thickness Probe (Harvest Initiation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How The Probe Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Harvest/Safety Limit Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Freeze Time Lock-In Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Freeze Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ice Thickness Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnosing Ice Thickness Control Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Level Control Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Level Probe Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Inlet Valve Safety Shut-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Freeze Cycle Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Harvest Cycle Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnosing Freeze Cycle Potable Water Level Control Circuitry . . . . . . . . .
Diagnosing An Ice Machine That Will Not Run . . . . . . . . . . . . . . . . . . . . . . . . .
4
6-17
6-17
6-18
6-19
6-20
6-21
6-22
6-23
6-24
6-25
6-26
6-27
6-28
6-29
6-30
6-31
6-32
6-33
6-34
6-35
6-36
6-38
6-38
6-38
6-40
6-41
6-44
6-44
6-45
6-47
6-47
6-47
6-47
6-47
6-47
6-48
6-50
6-50
6-50
6-50
6-50
6-51
6-54
Part No. 80-1100-3
Table of Contents (continued)
Section 7
Refrigeration System
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self-Contained Air or Water -Cooled Models . . . . . . . . . . . . . . . . . . . . . . . .
Remote Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q1300/Q1600/Q1800 Refrigeration Tubing Schematics . . . . . . . . . . . . . . .
Operational Analysis (Diagnostics) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Before Beginning Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ice Production Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation/Visual Inspection Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water System Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ice Formation Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Analyzing Discharge Pressure
During Freeze or Harvest Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Analyzing Suction Pressure
During Freeze Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Single Expansion Valve Ice Machines Comparing Evaporator Inlet and
Outlet Temperatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Harvest Valve Temperature Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Discharge Line Temperature Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Use the Refrigeration System
Operational Analysis Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigeration System Operational Analysis Tables . . . . . . . . . . . . . . . . . . . .
Harvest Pressure Regulating
(H.P.R.) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headmaster Control Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure Control Specifications and Diagnostics . . . . . . . . . . . . . . . . . . . . . .
Fan Cycle Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High Pressure Cut-Out (HPCO) Control . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cycle Time/24 Hour Ice Production/Refrigerant Pressure Charts . . . . . . . . .
Q200 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q280 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q320 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q370 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q420/450 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q450 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q600 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q800 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q1000 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q1300 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q1600 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q1800 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Part No. 80-1100-3
7-1
7-1
7-3
7-6
7-8
7-8
7-9
7-9
7-10
7-10
7-11
7-13
7-17
7-18
7-20
7-21
7-22
7-24
7-25
7-27
7-29
7-31
7-31
7-31
7-32
7-32
7-33
7-34
7-35
7-36
7-37
7-37
7-39
7-40
7-42
7-43
7-44
5
Table of Contents (continued)
Refrigerant Recovery/Evacuation and Recharging . . . . . . . . . . . . . . . . . . . . .
Normal Self-Contained Model Procedures . . . . . . . . . . . . . . . . . . . . . . . . . .
Normal Remote Model Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Contamination Clean-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing Pressure Controls Without
Removing Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filter-Driers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total System Refrigerant Charges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Re-Use Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HFC Refrigerant Questions and Answers . . . . . . . . . . . . . . . . . . . . . . . . . . .
6
7-46
7-46
7-48
7-52
7-54
7-56
7-56
7-57
7-58
7-59
Part No. 80-1100-3
Section 1
General Information
Model Numbers
How to Read a Model Number
This manual covers the following models:
Self-Contained
Air-Cooled
QR0320A
QD0322A
QY0324A
QR0420A
QD0422A
QY0424A
QR0200A
QD0202A
QY0204A
QR0280A
QD0282A
QY0284A
QD0372A
QY0374A
QR0450A
QD0452A
QY0454A
QR0600A
QD0602A
QY0604A
QR0800A
QD0802A
QY0804A
QR1000A
QD1002A
QY1004A
QR1300A
QD1302A
QY1304A
--QR1800A
QD1802A
QY1804A
Self-Contained
Water-Cooled
QR0321W
QD0323W
QY0325W
QR0421W
QD0423W
QY0425W
QR0201W
QD0203W
QY0205W
QR0281W
QD0283W
QY0285W
QD0373W
QY0375W
QR0451W
QD0453W
QY0455W
QR0601W
QD0603W
QY0605W
QR0801W
QD0803W
QY0805W
QR1001W
QD1003W
QY1005W
QR1301W
QD1303W
QY1305W
QD1603W
QY1605W
QR1801W
QD1803W
QY1805W
Remote
---
9 REMO TE
A IR -COOLED
--------QR0490N
QD0492N
QY0494N
QR0690N
QD0692N
QY0694N
QR0890N
QD0892N
QY0894N
QR1090N
QD1092N
QY1094N
QR1390N
QD1392N
QY1394N
QD1692N
QY1694N
QR1890N
QD1892N
QY1894N
# C UB E SIZE
CONDEN SER TY PE
0
1
2
3
4
5
A IR -COOLED
W ATER -COOLED
A IR -COOLED
W ATER -COOLED
A IR -COOLED
W ATER -COOLED
R EG U LAR
R EG U LAR
DICE
DICE
H A LF-DICE
H A LF-DICE
Q R 0450
A
ICE M A CHINE
MODEL
ICE C UB E SIZE
R R EG U LAR
D DICE
Y H A LF DICE
ICE M A CHINE
SER IES
CONDEN SER TY PE
A SEL F-CON TA INED AIR -COOLED
W SEL F-CON TA INED W ATER -COOLED
N R EMO TE AIR -COOLED
Ice Cube Sizes
Regular
Dice
Half Dice
1-1/8" x 1-1/8" x 7/8"
7/8" x 7/8" x 7/8"
3/8" x 1-1/8" x 7/8"
2.86 x 2.86 x 2.22 cm 2.22 x 2.22 x 2.22 cm 0.95 x 2.86 x 2.22 cm
NOTE: Model numbers ending in 3 indicate a 3-phase
unit. Example: QY1804A3
! Warning
PERSONAL INJURY POTENTIAL
Do not operate equipment that has been misused,
abused, neglected, damaged, or altered/modified
from that of original manufactured specifications.
Part No. 80-1100-3
1-1
General Information
Section 1
Model/Serial Number Location
These numbers are required when requesting
information from your local Manitowoc distributor, or
Manitowoc Ice, Inc.
The model and serial number are listed on the MODEL/
SERIAL NUMBER DECAL affixed to the ice machine,
remote condenser and storage bin.
SV1600
Figure 1-1. Model/Serial Number Location
1-2
Part No. 80-1100-3
Section 1
General Information
Warranty Coverage
EXCLUSIONS
GENERAL
The following items are not included in the ice machine’s
warranty coverage:
The following Warranty outline is provided for your
convenience. For a detailed explanation, read the
warranty bond shipped with each product.
Contact your local Manitowoc Distributor or Manitowoc
Ice, Inc. if you need further warranty information.
Important
This product is intended exclusively for commercial
application. No warranty is extended for personal,
family, or household purposes.
PARTS
1. Manitowoc warrants the ice machine against defects
in materials and workmanship, under normal use
and service for three (3) years from the date of
original installation.
2. The evaporator and compressor are covered by an
additional two (2) year (five years total) warranty
beginning on the date of the original installation.
LABOR
1. Labor required to repair or replace defective
components is covered for three (3) years from the
date of original installation.
2. The evaporator is covered by an additional two (2)
year (five years total) labor warranty beginning on
the date of the original installation.
Part No. 80-1100-3
1. Normal maintenance, adjustments and cleaning.
2. Repairs due to unauthorized modifications to the ice
machine or use of non-standard parts without prior
written approval from Manitowoc Ice, Inc.
3. Damage caused by improper installation of the ice
machine, electrical supply, water supply or drainage,
or damage caused by floods, storms, or other acts of
God.
4. Premium labor rates due to holidays, overtime,
etc.; travel time; flat rate service call charges;
mileage and miscellaneous tools and material
charges not listed on the payment schedule.
Additional labor charges resulting from the
inaccessibility of equipment are also excluded.
5. Parts or assemblies subjected to misuse, abuse,
neglect or accidents.
6. Damage or problems caused by installation,
cleaning and/or maintenance procedures
inconsistent with the technical instructions provided
in this manual.
7. This product is intended exclusively for commercial
application. No warranty is extended for personal,
family, or household purposes.
AUTHORIZED WARRANTY SERVICE
To comply with the provisions of the warranty, a
refrigeration service company qualified and authorized
by a Manitowoc distributor, or a Contracted Service
Representative must perform the warranty repair.
1-3
General Information
Section 1
THIS PAGE INTENTIONALLY LEFT BLANK
1-4
Part No. 80-1100-3
Section 2
Installation Instructions
General
Refer to Installation Manual for complete installation
guidelines.
Important
Failure to follow these installation guidelines may
affect warranty coverage.
Ice Machine Dimensions
Q320/Q370/Q420 ICE MACHINES
WATER COOLED
AIR COOLED
SV1602
Ice Machine
Q320
Q370
Q420
Part No. 80-1100-3
SV1611
Dimension H
21.5 in (54.6 cm)
21.5 in (54.6 cm)
26.5 in (67.3 cm)
2-1
Installation Instructions
Section 2
Q200 – Q1000 ICE MACHINES
Q1300/Q1600/Q1800 ICE MACHINES
WATER-COOLED
SELF CONTAINED
AIR-COOLED
SV1612
AIR-COOLED
SV1628
SELF CONTAINED
WATER-COOLED
SV1613
Ice Machine
Q200 – Q280
Q450
Q600
Q800
Q1000
2-2
Dimension H
16.5 in (41.9 cm)
21.5 in (54.6 cm)
21.5 in (54.6 cm)
26.5 in (67.3 cm)
29.5 in (74.9 cm)
SV1627
Ice Machine
Q1300/Q1600
Q1800
Dimension H
29.5 in (74.9 cm)
29.5 in (74.9 cm)
Part No. 80-1100-3
Section 2
Installation Instructions
Q1300/Q1600/Q1800 ICE MACHINES (CONT.)
Ice Storage Bin Dimensions
S170/S400/S570 ICE STORAGE BINS
REMOTE AIR-COOLED
SV1629
SV1609
Bin Model
S170
S400
S570
Dimension A
29.5 in (74.9 cm)
34.0 in (86.3 cm)
34.0 in (86.3 cm)
Dimension B
19.1 in (48.5 cm)
32.0 in (81.3 cm)
44.0 in (111.7 cm)
S320/S420 ICE STORAGE BINS
SV1614
Bin Model
S320
S420
Part No. 80-1100-3
Dimension A
34.0 in (86.3 cm)
34.0 in (86.3 cm)
Dimension B
32.0 in (81.3 cm)
44.0 in (111.7 cm)
2-3
Installation Instructions
Section 2
Remote Condenser Dimensions
S970 ICE STORAGE BINS
JC0495/JC0895/JC1095/JC1395
SV1610
! Warning
SV1297
JC1895
All Manitowoc ice machines require the ice storage
system (bin, dispenser, etc.) to incorporate an ice
deflector.
The Q1300, Q1600 and Q1800 series ice machines
require adding Manitowoc Ice Deflector Kit K00139
when installing with non-Manitowoc ice storage
systems.
Prior to using a non-Manitowoc ice storage system
with other Manitowoc ice machines, contact the
manufacturer to assure their ice deflector is
compatible with Manitowoc ice machines.
SV1301
2-4
Part No. 80-1100-3
Section 2
Installation Instructions
Location of Ice Machine
The location selected for the ice machine must meet the
following criteria. If any of these criteria are not met,
select another location.
•
The location must be free of airborne and other
contaminants.
•
The air temperature must be at least 35°F (1.6°C),
but must not exceed 110°F (43.4°C).
•
The location must not be near heat-generating
equipment or in direct sunlight.
•
The location must not obstruct air flow through or
around the ice machine. Refer to the chart below for
clearance requirements.
Q1300/Q1600/
Q1800
Top/Sides
Back
Self-Contained
Air-Cooled
24" (61 cm)
12" (30.5 cm)
Top/Sides
Back
Self-Contained
Air-Cooled
12" (30.5 cm)
5" (127 mm)
All other
Q models
Top/Sides
Back
Self-Contained
Air-Cooled
8" (20.3 cm)
5" (12.7 cm)
Q370
Water-Cooled
and Remote
8" (20.3 cm)
5" (12.7 cm)
Water-Cooled
5" (12.7 cm)
5" (12.7 cm)
Water-Cooled
and Remote
8" (20.3 cm)
5" (12.7 cm)
There is no minimum clearance required. This value is
recommended for efficient operation and servicing only.
Q1600 is not available as an air-cooled model.
! Caution
The ice machine must be protected if it will be
subjected to temperatures below 32°F (0°C).
Failure caused by exposure to freezing
temperatures is not covered by the warranty. See
“Removal from Service/Winterization” on Page 314.
Stacking Two Ice Machines on a Single
Storage Bin
A stacking kit is required for stacking two ice machines.
Installation instructions are supplied with the stacking kit.
Q450/Q600/
Q800/Q1000
Top/Sides
Back
Q1300/Q1600/
Q1800
Top/Sides
Back
Stacked
Self-Contained
Air-Cooled
16" (40.64 cm)
5" (12.70 cm)
Stacked
Water-Cooled
and Remote*
5" (12.70 cm)
5" (12.70 cm)
48" (121.92 cm)
12" (30.48 cm)
24" (60.96 cm)
12" (30.48 cm)
*There is no minimum clearance required. This value is
recommended for efficient operation and servicing only.
Q1600 is not available as an air-cooled model.
Ice Machine Heat of Rejection
Series
Ice Machine
Q320
Q370
Q420
Q200
Q280
Q450
Q600
Q800
Q1000
Q1300
Q1600
Q1800
Heat of Rejection
Air Conditioning
Peak
4,600
6,200
3,900
5,950
7,000
9,600
3,800
5,000
3,800
6,000
7,000
9,600
9,000
13,900
12,400
19,500
16,000
24,700
24,000
35,500
24,000
35,500
36,000
50,000
B.T.U./Hour
Because the heat of rejection varies during the ice making cycle,
the figure shown is an average.
Ice machines, like other refrigeration equipment, reject
heat through the condenser. It is helpful to know the
amount of heat rejected by the ice machine when sizing
air conditioning equipment where self-contained aircooled ice machines are installed.
This information is also necessary when evaluating the
benefits of using water-cooled or remote condensers to
reduce air conditioning loads. The amount of heat added
to an air conditioned environment by an ice machine
using a water-cooled or remote condenser is negligible.
Knowing the amount of heat rejected is also important
when sizing a cooling tower for a water-cooled
condenser. Use the peak figure for sizing the cooling
tower.
Part No. 80-1100-3
2-5
Installation Instructions
Section 2
Leveling the Ice Storage Bin
Air-Cooled Baffle
1. Screw the leveling legs onto the bottom of the bin.
2. Screw the foot of each leg in as far as possible.
The air-cooled baffle prevents condenser air from
recirculating. To install:
1. Remove the back panel screws next to the
condenser.
! Caution
The legs must be screwed in tightly to prevent them
from bending.
2. Align the mounting holes in the air baffle with the
screw holes and reinstall the screws.
3. Move the bin into its final position.
4. Level the bin to assure that the bin door closes and
seals properly. Use a level on top of the bin. Turn
each foot as necessary to level the bin.
NOTE: An optional caster assembly is available for use
in place of the legs. Installation instructions are supplied
with the casters.
AIR
BAFFLE
SCREWS
THREAD LEVELING
LEG INTO BASE OF
CABINET
SV1607
THREAD ‘FOOT’ IN AS
FAR AS POSSIBLE
Figure 2-2. Air Baffle
SV1606
Figure 2-1. Leveling Leg and Foot
2-6
Part No. 80-1100-3
Section 2
Installation Instructions
Electrical Service
FUSE/CIRCUIT BREAKER
GENERAL
A separate fuse/circuit breaker must be provided for
each ice machine. Circuit breakers must be H.A.C.R.
rated (does not apply in Canada).
! Warning
All wiring must conform to local, state and national
codes.
MINIMUM CIRCUIT AMPACITY
VOLTAGE
The minimum circuit ampacity is used to help select the
wire size of the electrical supply. (Minimum circuit
ampacity is not the ice machine’s running amp load.)
The maximum allowable voltage variation is ±10% of the
rated voltage at ice machine start-up (when the electrical
load is highest).
The wire size (or gauge) is also dependent upon
location, materials used, length of run, etc., so it must be
determined by a qualified electrician.
! Warning
The ice machine must be grounded in accordance
with national and local electrical codes.
Part No. 80-1100-3
2-7
Installation Instructions
Section 2
Table 2-1. Q320/370/420 Ice Machines
Voltage
Phase
Cycle
Ice Machine
Q320
Q370
Q420
115/1/60
208-230/1/60
230/1/50
115/1/60
208-230/1/60
230/1/50
115/1/60
208-230/1/60
230/1/50
Air-Cooled
Maximum Fuse/
Minimum
Circuit Breaker
Circuit Amps
15
11.2
15
4.8
15
5.2
20
12.9
15
6.2
15
6.2
20
12.3
15
7.8
15
6.3
Water Cooled
Maximum Fuse/
Minimum
Circuit Breaker
Circuit Amps
15
10.5
15
4.2
15
4.7
20
12.2
15
5.8
15
5.8
20
11.4
15
7.4
15
5.9
Table 2-2. Q200 - Q1000 Ice Machines
Ice Machine
Q200
Q280
Q450
Q600
Q800
Q1000
Q1300
Q1600
Q1800
2-8
Voltage
Phase
Cycle
115/1/60
208-230/1/60
230/1/50
115/1/60
208-230/1/60
230/1/50
115/1/60
208-230/1/60
230/1/50
208-230/1/60
230/1/50
208-230/1/60
208-230/3/60
230/1/50
208-230/1/60
208-230/3/60
230/1/50
208-230/1/60
208-230/3/60
230/1/50
380-415/3/50
208-230/1/60
208-230/3/60
230/1/50
380-415/3/50
208-230/1/60
208-230/3/60
230/1/50
380-415/3/50
Air-Cooled
Maximum
Minimum
Fuse/Circuit
Circuit Amps
Breaker
15
11.6
15
5.4
15
5.2
20
12.6
15
5.7
15
5.7
20
12.8
15
7.8
15
6.1
15
9.2
15
9.2
20
12.1
15
8.9
20
12.0
20
14.3
15
9.8
20
15.6
30
19.5
20
13.1
30
15.7
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
40
28.1
20
15.5
40
23.3
N/A
N/A
Water Cooled
Maximum
Minimum
Fuse/Circuit
Circuit Amps
Breaker
15
10.9
15
4.8
15
4.9
20
11.7
15
5.2
15
5.2
20
11.9
15
7.4
15
5.7
15
8.7
15
8.8
20
11.4
15
8.2
20
10.6
20
13.2
15
8.8
20
14.2
30
18.1
20
11.6
30
14.3
N/A
N/A
30
17.2
20
11.0
N/A
N/A
N/A
N/A
40
26.7
20
14.1
40
21.9
N/A
N/A
Remote
Maximum
Minimum
Fuse/Circuit
Circuit Amps
Breaker
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
20
13.6
N/A
N/A
N/A
N/A
15
9.3
15
9.4
20
11.9
15
8.9
20
11.2
20
14.2
15
9.9
20
14.6
30
19.8
20
12.7
30
14.7
15
7.3
30
18.2
20
12.0
N/A
N/A
N/A
N/A
40
26.9
20
13.9
40
22.2
15
9.1
Part No. 80-1100-3
Section 2
Installation Instructions
Self-Contained Electrical Wiring Connections
! Warning
These diagrams are not intended to show proper
wire routing, wire sizing, disconnects, etc., only the
correct wire connections.
SELF CONTAINED ICE MACHINE
208-230/3/60
All electrical work, including wire routing and
grounding, must conform to local, state and national
electrical codes.
Though wire nuts are shown in the drawings, the ice
machine field wiring connections may use either
wire nuts or screw terminals.
SELF CONTAINED ICE MACHINE
115/1/60 OR 208-230/1/60
L1
L1
L2
L2
L3
L3
GROUND
ICE MACHINE
CONNECTIONS
SV1190
L1
TO SEPARATE
FUSE/BREAKER
L1
N=115V
OR
L2=208-230V
GROUND
SV1258
GROUND
ICE MACHINE
CONNECTIONS
SELF CONTAINED ICE MACHINE
230/1/50
L1
GROUND
L1
TO SEPARATE
FUSE/BREAKER
N
N
GROUND
GROUND
ICE MACHINE
CONNECTIONS
SV1191
TO SEPARATE
FUSE/BREAKER.
DISCONNECT ALL
POLES.
For United Kingdom Only
As the colours of the wires in the mains lead of the appliance may not correspond with the coloured markings
identifying the terminals in your plug, proceed as follows:
•
The wire which is coloured green and yellow must be connected to the terminal in the plug which is marked with
the letter E or by the earth ground symbol
or coloured green or green and yellow.
•
The wire coloured blue must be connected to the terminal which is marked with the letter N or coloured black.
•
The wire coloured brown must be connected to the terminal which is marked with the letter L or coloured red.
Part No. 80-1100-3
2-9
Installation Instructions
Section 2
Remote Electrical Wiring Connections
REMOTE ICE MACHINE
WITH SINGLE CIRCUIT MODEL CONDENSER
208-230/3/60 OR 380-415/3/50
! Warning
These diagrams are not intended to show proper
wire routing, wire sizing, disconnects, etc., only the
correct wire connections.
All electrical work, including wire routing and
grounding, must conform to local, state and national
electrical codes.
L1
SINGLE CIRCUIT
REMOTE
CONDENSER
L2
GROUND
Though wire nuts are shown in the drawings, the ice
machine field wiring connections may use either
wire nuts or screw terminals.
GROUND
F2
F1
REMOTE ICE MACHINE
WITH SINGLE CIRCUIT MODEL CONDENSER
115/1/60 OR 208-230/1/60
SINGLE CIRCUIT L1
REMOTE
CONDENSER
L2
NOTE: FAN
MOTOR IS
208-230V
ICE
MACHINE
NOTE:
CONDENSER FAN
MOTOR VOLTAGE
MATCHES ICE
MACHINE
VOLTAGE (115V
OR 208-230V)
L1
L1
L2
L2
L3
L3
GROUND
GROUND
TO SEPARATE
FUSE/BREAKER
SV1199
REMOTE ICE MACHINE
WITH SINGLE CIRCUIT MODEL CONDENSER
230/1/50
F2
F1
ICE
MACHINE
L1
L1
N=115V OR L2=208-230V
L2
GROUND
SV1255
L2
L
SINGLE CIRCUIT 1
REMOTE
CONDENSER
L2
NOTE: FAN
MOTOR IS
220-240V
GROUND
TO SEPARATE
FUSE/BREAKER
F2
ICE
MACHINE
F1
L1
L1
N
N
GROUND
SV1256
2-10
GROUND
TO SEPARATE
FUSE/BREAKER
(220-240).
DISCONNECT ALL
POLES.
Part No. 80-1100-3
Section 2
Installation Instructions
Water Supply and Drain Requirements
DRAIN CONNECTIONS
WATER SUPPLY
Follow these guidelines when installing drain lines to
prevent drain water from flowing back into the ice
machine and storage bin:
Local water conditions may require treatment of the
water to inhibit scale formation, filter sediment, and
remove chlorine odor and taste.
Important
If you are installing a Manitowoc water filter system,
refer to the Installation Instructions supplied with the
filter system for ice making water inlet connections.
WATER INLET LINES
•
Drain lines must have a 1.5 inch drop per 5 feet of
run (2.5 cm per meter), and must not create traps.
•
The floor drain must be large enough to
accommodate drainage from all drains.
•
Run separate bin and ice machine drain lines.
Insulate them to prevent condensation.
•
Vent the bin and ice machine drain to the
atmosphere. Do not vent the condenser drain on
water-cooled models.
Follow these guidelines to install water inlet lines:
•
Do not connect the ice machine to a hot water
supply. Be sure all hot water restrictors installed for
other equipment are working. (Check valves on sink
faucets, dishwashers, etc.)
•
If water pressure exceeds the maximum
recommended pressure, obtain a water pressure
regulator from your Manitowoc distributor.
•
Install a water shut-off valve for both the ice making
and condenser water lines.
•
Insulate water inlet lines to prevent condensation.
Part No. 80-1100-3
Cooling Tower Applications
(Water-Cooled Models)
A water cooling tower installation does not require
modification of the ice machine. The water regulator
valve for the condenser continues to control the
refrigeration discharge pressure.
It is necessary to know the amount of heat rejection, and
the pressure drop through the condenser and water
valves (inlet and outlet) when using a cooling tower on
an ice machine.
•
Water entering the condenser must not exceed 90°F
(32.2°C).
•
Water flow through the condenser must not exceed 5
gallons (19 liters) per minute.
•
Allow for a pressure drop of 7 psi (48 kPA) between
the condenser water inlet and the outlet of the ice
machine.
•
Water exiting the condenser must not exceed 110°F
(43.3°C).
2-11
Installation Instructions
Section 2
WATER SUPPLY AND DRAIN LINE SIZING/CONNECTIONS
! Caution
Plumbing must conform to state and local codes.
Location
Water Temperature
Water Pressure
Ice Machine Fitting
Ice Making
Water Inlet
33°F (0.6°C) Min.
90°F (32.2°C) Max.
20 psi (137.9 kPA) Min.
80 psi (551.5 kPA) Max.
3/8" Female
Pipe Thread
Ice Making
Water Drain
---
---
Condenser
Water Inlet
33°F (0.6°C) Min.
90°F (32.2°C) Max.
20 psi (137.9 kPA) Min.
150 psi (1034.2 kPA) Max.
Condenser
Water Drain
---
---
Bin Drain
---
---
Tubing Size Up to Ice
Machine Fitting
3/8" (9.5 mm) minimum
inside diameter
1/2" Female
1/2" (12.7 mm) minimum
Pipe Thread
inside diameter
Q1300/Q1600/Q1800 - 1/2" Female Pipe Thread
All Others - 3/8" Female Pipe Thread
1/2" Female
1/2" (12.7 mm) minimum
Pipe Thread
inside diameter
3/4" Female
3/4" (19.1 mm) minimum
Pipe Thread
inside diameter
SV1626
Figure 2-3. Typical Water Supply Drain Installation
2-12
Part No. 80-1100-3
Section 2
Installation Instructions
Remote Condenser/Line Set Installation
Ice Machine
Q490
Q690
Q890
Q1090
Q1390
Q1690
Q1890
Remote Single
Circuit
Condenser
JC0495
JC0895
JC1095
JC1395
JC1695
JC1895
Line Set*
RT-20-R404A
RT-35-R404A
RT-50-R404A
RL-20-R404A
RL-35-R404A
RL-50-R404A
Additional refrigerant may be required for installations
using line sets between 50' and 100' (15.25-30.5 m)
long. If additional refrigerant is required, an additional
label located next to the Model/Serial Numbers decal
states the amount of refrigerant to be added.
IMPORTANT
EPA CERTIFIED TECHNICIANS
If remote line set length is between 50' and 100' (15.2530.5 m), add 1.5 lb. (24 oz) (0.68 kg) of refrigerant to the
nameplate charge.
Tubing length: ______________________________
Refrigerant added to nameplate: ________________
New total refrigerant charge: ___________________
*Line Set
RT
RL
Discharge Line
1/2" (1.27 cm)
1/2" (1.27 cm)
Liquid Line
5/16" (.79 cm)
3/8" (.95 cm)
Air Temperature Around the Condenser
Minimum
Maximum
-20°F (-28.9°C)
120°F (49°C)
Figure 2-4. Typical Additional Refrigerant Label
If there is no additional label, the nameplate charge is
sufficient for line sets up to 100' (30.5 m). (See the chart
below.)
WARNING
Potential Personal Injury Situation
REMOTE ICE MACHINES
REFRIGERANT CHARGE
Each remote ice machine ships from the factory with a
refrigerant charge appropriate for installation with line
sets of up to 50' (15.25 m). The serial tag on the ice
machine indicates the refrigerant charge.
Ice Machine
Q490
Q690
Q890
Q1090
Q1390
Q1690
Q1890
Part No. 80-1100-3
Nameplate Charge
(Charge Shipped in Ice Machine)
6 lb. (96 oz.)
8 lb. (128 oz.)
8 lb. (128 oz.)
9.5 lb. (152 oz.)
12.5 lb. (200 oz.)
15 lb. (240 oz.)
15 lb. (240 oz.)
The ice machine contains refrigerant charge. Installation of
the line sets must be performed by a properly trained and
EPA certified refrigeration technician aware of the dangers
of dealing with refrigerant charged equipment.
Refrigerant to be Added for
50'-100' Line Sets
None
None
None
None
1.5 lb. (24 oz)
2.0 lb. (32 oz)
2.0 lb. (32 oz)
Maximum System Charge
(Never Exceed)
6 lb. (96 oz.)
8 lb. (128 oz.)
8 lb. (128 oz.)
9.5 lb. (152 oz.)
14 lb. (224 oz.)
17 lb. (272 oz.)
17 lb. (272 oz.)
2-13
Installation Instructions
Section 2
GENERAL
GUIDELINES FOR ROUTING LINE SETS
Condensers must be mounted horizontally with the fan
motor on top.
First, cut a 2.5" (6.35 cm) circular hole in the wall or roof
for tubing routing. The line set end with the 90° bend will
connect to the ice machine. The straight end will connect
to the remote condenser.
Remote condenser installations consist of vertical and
horizontal line sets between the ice machine and the
condenser. When combined, they must fit within
approved specifications. The following guidelines,
drawings and calculation methods must be followed to
verify a proper remote condenser installation.
! Caution
The 60 month compressor warranty (including the
36 month labor replacement warranty) will not apply
if the remote ice machine is not installed according
to specifications.
This warranty also will not apply if the refrigeration
system is modified with a condenser, heat reclaim
device, or other parts or assemblies not
manufactured by Manitowoc Ice, Inc., unless
specifically approved in writing by Manitowoc Ice,
Inc.
3
Follow these guidelines when routing the refrigerant
lines. This will help insure proper performance and
service accessibility.
1. Optional - Make the service loop in the line sets (See
Figure 2-5). This permits easy access to the ice
machine for cleaning and service. Do not use hard
rigid copper at this location.
2. Required - Do not form traps in the refrigeration lines
(except the service loop). Refrigerant oil must be
free to drain toward the ice machine or the
condenser. Route excess tubing in a supported
downward horizontal spiral (See Figure 2-5). Do not
coil tubing vertically.
3. Required - Keep outdoor refrigerant line runs as
short as possible.
DOWNWARD
HORIZONTAL
SPIRAL
2
2
3
1
1
SV1204
Figure 2-5. Routing Line Sets
2-14
Part No. 80-1100-3
Section 2
Installation Instructions
Make the following calculations to make sure the line set
layout is within specifications.
CALCULATING REMOTE CONDENSER
INSTALLATION DISTANCES
Line Set Length
1. Insert the measured rise into the formula below.
Multiply by 1.7 to get the calculated rise.
(Example: A condenser located 10 feet above the
ice machine has a calculated rise of 17 feet.)
The maximum length is 100' (30.5 m).
The ice machine compressor must have the proper oil
return. The receiver is designed to hold a charge
sufficient to operate the ice machine in ambient
temperatures between -20°F (-28.9°C) and 120°F
(49°C), with line set lengths of up to 100' (30.5 m).
2. Insert the measured drop into the formula below.
Multiply by 6.6 to get the calculated drop.
(Example. A condenser located 10 feet below the
ice machine has a calculated drop of 66 feet.)
Line Set Rise/Drop
3. Insert the measured horizontal distance into the
formula below. No calculation is necessary.
The maximum rise is 35' (10.7 m).
The maximum drop is 15' (4.5 m).
4. Add together the calculated rise, calculated drop,
and horizontal distance to get the total calculated
distance. If this total exceeds 150' (45.7 m), move
the condenser to a new location and perform the
calculations again.
! Caution
If a line set has a rise followed by a drop, another
rise cannot be made. Likewise, if a line set has a
drop followed by a rise, another drop cannot be
made.
Calculated Line Set Distance
The maximum distance is 150' (45.7 m).
Line set rises, drops, horizontal runs (or combinations of
these) in excess of the stated maximums will exceed
compressor start-up and design limits. This will cause
poor oil return to the compressor.
Maximum Line Set Distance Formula
Step 1.
Step 2.
Step 3.
Step 4.
Measured Rise (35' [10.7 m] Maximum)
______ x 1.7
Measured Drop (15' [4.5 m] Maximum)
______ x 6.6
Measured Horizontal Distance (100' [30.5 m] Maximum)
Total Calculated Distance 150' (45.7 m)
=
=
_______
_______
_______
_______
H
H
H
R
D
D
R
SV1196
Figure 2-6. Combination of a Rise
and a Horizontal Run
Part No. 80-1100-3
Calculated Rise
Calculated Drop
Horizontal Distance
Total Calculated Distance
SV1195
Figure 2-7. Combination of a Drop
and a Horizontal Run
SV1194
Figure 2-8. Combination of a
Rise, a Drop and a Horizontal Run
2-15
Installation Instructions
Section 2
LENGTHENING OR REDUCING LINE SET LENGTHS
REMOTE RECEIVER SERVICE VALVE
In most cases, by routing the line set properly,
shortening will not be necessary. When shortening or
lengthening is required, do so before connecting the line
set to the ice machine or the remote condenser. This
prevents the loss of refrigerant in the ice machine or
condenser.
The receiver service valve is closed during shipment.
Open the valve prior to starting the ice machine.
The quick connect fittings on the line sets are equipped
with Schraeder valves. Use these valves to recover any
vapor charge from the line set. When lengthening or
shortening lines, follow good refrigeration practices and
insulate new tubing. Do not change the tube sizes.
Evacuate the lines and place about 5 oz (143g) of vapor
refrigerant charge in each line.
1. Remove the top and left side panels.
2. Remove the receiver service valve cap.
3. Backseat (open) the valve.
4. Reinstall the cap and panels.
REMOVE FRONT, TOP,
AND LEFT SIDE PANEL
FOR ACCESS TO
RECEIVER VALVE
CONNECTING A LINE SET
1. Remove the dust caps from the line set, condenser
and ice machine.
TURN
COUNTERCLOCKWISE TO
OPEN
2. Apply refrigeration oil to the threads on the quick
disconnect couplers before connecting them to the
condenser.
3. Carefully thread the female fitting to the condenser
or ice machine by hand.
4. Tighten the couplings with a wrench until they
bottom out.
5. Turn an additional 1/4 turn to ensure proper brassto-brass seating. Torque to the following
specifications:
Liquid Line
10-12 ft lb.
(13.5-16.2 N•m)
Discharge Line
35-45 ft lb.
(47.5-61.0 N•m)
SV1603
RECEIVER SERVICE
VALVE CAP (TURN
COUNTERCLOCKWISE TO
REMOVE)
Figure 2-9. Backseating the Receiver Service Valve
6. Check all fittings for leaks.
2-16
Part No. 80-1100-3
Section 2
Installation Instructions
Remote Ice Machine Usage with Non-Manitowoc Multi-Circuit Condensers
WARRANTY
FAN MOTOR
The sixty (60) month compressor warranty, including
thirty six (36) month labor replacement warranty, shall
not apply when the remote ice machine is not installed
within the remote specifications. The foregoing warranty
shall not apply to any ice machine installed and/or
maintained inconsistent with the technical instructions
provided by Manitowoc Ice, Inc. Performance may vary
from Sales specifications. Q-Model ARI certified
standard ratings only apply when used with a Manitowoc
remote condenser.
The condenser fan must be on during the complete ice
machine freeze cycle (do not cycle on fan cycle control).
The ice maker has a condenser fan motor circuit for use
with a Manitowoc condenser. It is recommended that this
circuit be used to control the condenser fan(s) on the
multi-circuit condenser to assure it is on at the proper
time. Do not exceed the rated amps for the fan motor
circuit listed on the ice machine’s serial tag.
If the design of the condenser meets the specifications,
Manitowoc’s only approval is for full warranty coverage
to be extended to the Manitowoc manufactured part of
the system. Since Manitowoc does not test the
condenser in conjunction with the ice machine,
Manitowoc will not endorse, recommend, or approve the
condenser, and will not be responsible for its
performance or reliability..
Important
Manitowoc warrants only complete new and unused
remote packages. Guaranteeing the integrity of a
new ice machine under the terms of our warranty
prohibits the use of pre-existing (used) tubing or
condensers.
HEAD PRESSURE CONTROL VALVE
Any remote condenser connected to a Manitowoc QModel Ice Machine must have a head pressure control
valve #836809-3 (available from Manitowoc Distributors)
installed on the condenser package. Manitowoc will not
accept substitute “off the shelf” head pressure control
valves.
INTERNAL CONDENSER VOLUME
The multi-circuit condenser internal volume must not be
less than or exceed that used by Manitowoc (see chart
on Page 2-18). Do not exceed internal volume and try
to add charge to compensate, as compressor failure
will result.
CONDENSER ∆T
∆T is the difference in temperature between the
condensing refrigerant and entering air. The ∆T should
be 15 to 20°F (-9.4 to -6.6°C) at the beginning of the
freeze cycle (peak load conditions) and drop down to 12
to 17°F (-11.1 to -8.3°C) during the last 75% of the
freeze cycle (average load conditions).
REFRIGERANT CHARGE
Remote ice machines have the serial plate refrigerant
charge (total system charge) located in the ice maker
section. (Remote condensers and line sets are supplied
with only a vapor charge.)
! Caution
Never add more than nameplate charge to ice
machine for any application.
QUICK CONNECT FITTINGS
! Caution
Do not use a fan cycling control to try to maintain
discharge pressure. Compressor failure will result.
Part No. 80-1100-3
The ice machine and line sets come with quick connect
fittings. It is recommended that matching quick connects
(available through Manitowoc Distributors) be installed in
the multi-circuit condenser, and that a vapor “holding”
charge (5 oz.) of proper refrigerant be added to the
condenser prior to connection of the ice machine or line
set to the condenser.
2-17
Installation Instructions
Section 2
NON-MANITOWOC MULTI-CIRCUIT CONDENSER SIZING CHART
Ice
Machine
Model
Refrigerant
Heat of Rejection
Internal
Condenser
Volume (cu ft)
Peak
Btu/hr
9,600
13,900
Min
Max
6 lbs.
8 lbs.
Average
Btu/hr
7,000
9,000
0.020
0.045
0.035
0.060
8 lbs.
9.5 lbs.
14 lbs.1
17 lbs.1
17 lbs.
12,400
16,000
24,000
36,000
36,000
19,500
24,700
35,500
50,000
50,000
0.045
0.065
0.085
0.130
0.130
0.060
0.085
0.105
0.170
0.170
Type
Charge
Q450
Q600
R-404A
R-404A
Q800
Q1000
Q1300
Q1600
Q1800
R-404A
R-404A
R-404A
R-404A
R-404A
Quick Connect StubsMale Ends
Discharge
Liquid
Head
Pressure
Control
Valve
500 psig
safe working
pressure
coupling
P/N
83-6035-3
coupling
P/N
83-6034-3
Manitowoc
P/N
83-6809-3
2,500 psig
burst
pressure
mounting
flange P/N
83-6006-3
mounting
flange P/N
83-6005-3
no
substitutes
Design
Pressure
Amount reflects additional R-404A refrigerant added to nameplate charge for 50' to 100' line sets, to ensure proper operation at all ambient
conditions. Q1300 has 1.5 lbs. additional R-404A. Q1600 and Q1800 has 2.0 lbs. additional R-404A
SINGLE CIRCUIT REMOTE
CONDENSER
ELECTRICAL
DISCONNECT
DISCHARGE
LINE
LIQUID LINE
ELECTRICAL
DISCONNECT
ICE MACHINE
ELECTRICAL
SUPPLY
36.00"
(91.44 cm)
DROP
BIN
DISCHARGE
REFRIGERANT
LINE
LIQUID
REFRIGERANT
LINE
SV1615
Figure 2-10. Typical Single Circuit Remote Condenser Installation
2-18
Part No. 80-1100-3
Section 2
Installation Check List
Installation Instructions
Are the ice machine and bin drains vented?
Is the Ice Machine level?
Has all of the internal packing been removed?
Are all electrical leads free from contact with
refrigeration lines and moving equipment?
Have all of the electrical and water connections
been made?
Has the owner/operator been instructed
regarding maintenance and the use of
Manitowoc Cleaner and Sanitizer?
Has the supply voltage been tested and checked
against the rating on the nameplate?
Has the owner/operator completed the warranty
registration card?
Is there proper clearance around the ice machine
for air circulation?
Has the ice machine and bin been sanitized?
Has the ice machine been installed where
ambient temperatures will remain in the range of
35° - 110°F (1.7° - 43.3°C)?
Has the ice machine been installed where the
incoming water temperature will remain in the
range of 33° - 90°F (0.6° - 32.2°C)?
Is there a separate drain for the water-cooled
condenser?
Is the water trough drain plug installed? (The drain
plug is taped to the top of the water pump).
Is the toggle switch set to ice? (The toggle switch
is located directly behind the front panel).
Is the ice thickness control set correctly? (Refer
to Operational Checks on page 3-4 of this
manual to check/set the correct ice bridge
thickness).
Additional Checks for Remote Models
Has the receiver service valve been opened?
Does the remote condenser fan operate properly
after start-up?
Has the remote condenser been located where
ambient temperatures will remain in the range of
-20° - 120°F ( -6.6 - 49°C).
Is the line set routed properly?
Part No. 80-1100-3
2-19
Installation Instructions
Section 2
THIS PAGE INTENTIONALLY LEFT BLANK
2-20
Part No. 80-1100-3
Section 3
Maintenance
Component Identification
AIR CONDENSER
HARVEST VALVE
CONDENSER WATER
REGULATING VALVE
REMOTE COUPLINGS
WATER DUMP VALVE
COMPRESSOR
WATER
CONDENSER
DRAIN HOSE
DISTRIBUTION
TUBE
ICE THICKNESS
PROBE
EVAPORATOR
WATER COOLED
MODEL
SV1604G
HIGH PRESSURE CUTOUT/
MANUAL RESET
(When applicable)
ICE/OFF/CLEAN
SWITCH
WATER
PUMP
WATER
CURTAIN
WATER
TROUGH
SV1605
BIN SWITCH
Figure 3-1. Component Identification (Typical Q450 Shown)
Part No. 80-1100-3
3-1
Maintenance
Section 3
Operational Checks
ICE THICKNESS CHECK
GENERAL
The ice thickness probe is factory-set to maintain the ice
bridge thickness at 1/8" (3.2 mm).
Manitowoc ice machines are factory-operated and
adjusted before shipment. Normally, new installations do
not require any adjustment.
To ensure proper operation, always follow the
Operational Checks:
•
when starting the ice machine for the first time
•
after a prolonged out of service period
•
after cleaning and sanitizing
NOTE: Make sure the water curtain is in place when
performing this check. It prevents water from splashing
out of the water trough.
1. Inspect the bridge connecting the cubes. It should
be about 1/8" (3.2 mm) thick.
2. If adjustment is necessary, turn the ice thickness
probe adjustment screw clockwise to increase
bridge thickness, counterclockwise to decrease
bridge thickness.
NOTE: Routine adjustments and maintenance
procedures are not covered by the warranty.
NOTE: Turning the adjustment 1/3 of a turn will change
the ice thickness about 1/16" (1.5 mm).
WATER LEVEL
The water level sensor is set to maintain the proper
water level above the water pump housing. The water
level is not adjustable.
ADJUSTING SCREW
If the water level is incorrect, check the water level probe
for damage (probe bent, etc.). Repair or replace the
probe as necessary.
1/8” ICE BRIDGE THICKNESS
SV1208
Figure 3-3. Ice Thickness Check
3. Make sure the ice thickness probe wire and the
bracket do not restrict movement of the probe.
SV1616
Figure 3-2. Water Level Probe
3-2
Part No. 80-1100-3
Section 3
Maintenance
Cleaning the Condenser
HARVEST SEQUENCE WATER PURGE
The harvest sequence water purge adjustment may be
used when the ice machine is hooked up to special
water systems, such as a de-ionized water treatment
system.
! Warning
Disconnect electric power to the ice machine and
the remote condenser at the electric service switch
before cleaning the condenser.
Important
The harvest sequence water purge is factory-set at
45 seconds. A shorter purge setting (with standard
water supplies such as city water) is not
recommended. This can increase water system
cleaning and sanitizing requirements.
•
The harvest sequence water purge may be set to 15,
30, or 45 seconds.
•
During the harvest sequence water purge, the water
fill valve energizes and de-energizes by time. The
water purge must be at the factory setting of 45
seconds for the water fill valve to energize during the
last 15 seconds of the water purge. If it is set to less
than 45 seconds, the water fill valve will not energize
during the water purge.
AIR-COOLED CONDENSER
(SELF-CONTAINED AND REMOTE MODELS)
A dirty condenser restricts airflow, resulting in
excessively high operating temperatures. This reduces
ice production and shortens component life. Clean the
condenser at least every six months. Follow the steps
below.
! Caution
The condenser fins are sharp. Use care when
cleaning them.
1. The washable aluminum filter on self-contained ice
machines is designed to catch dust, dirt, lint and
grease. This helps keep the condenser clean. Clean
the filter with a mild soap and water solution.
CONTROL
BOARD
WATER PURGE
ADJUSTMENT
30
45
15
AIR FILTER
SV1608
Figure 3-5. Self-Contained Air-Cooled Filter
SV1617
Figure 3-4. Water Purge Adjustment
2. Clean the outside of the condenser (bottom of a
remote condenser) with a soft brush or a vacuum
with a brush attachment. Clean from top to bottom,
not side to side. Be careful not to bend the
condenser fins.
Continued on next page …
Part No. 80-1100-3
3-3
Maintenance
Section 3
3. Shine a flashlight through the condenser to check
for dirt between the fins. If dirt remains:
WATER-COOLED CONDENSER
AND WATER REGULATING VALVE
A. Blow compressed air through the condenser fins
from the inside. Be careful not to bend the fan
blades.
Symptoms of restrictions in the condenser water circuit
include:
•
Low ice production
B. Use a commercial condenser coil cleaner.
Follow the directions and cautions supplied with
the cleaner.
•
High water consumption
•
High operating temperatures
4. Straighten any bent condenser fins with a fin comb.
•
High operating pressures
If the ice machine is experiencing any of these symptoms,
the water-cooled condenser and water regulating valve
may require cleaning due to scale build-up.
CONDENSER
The cleaning procedures require special pumps and
cleaning solutions. Follow the manufacturer’s
instructions for the specific cleaner being used.
FIN COMB
“COMB”
DOWN
ONLY
SV1515
Figure 3-6. Straighten Bent Condenser Fins
5. Carefully wipe off the fan blades and motor with a
soft cloth. Do not bend the fan blades. If the fan
blades are excessively dirty, wash with warm, soapy
water and rinse thoroughly.
! Caution
If you are cleaning the condenser fan blades with
water, cover the fan motor to prevent water
damage.
3-4
Part No. 80-1100-3
Section 3
Maintenance
Interior Cleaning and Sanitizing
GENERAL
Clean and sanitize the ice machine every six months for
efficient operation. If the ice machine requires more
frequent cleaning and sanitizing, consult a qualified
service company to test the water quality and
recommend appropriate water treatment or installation
of AuCS accessory (Automatic Cleaning System). If
required, an extremely dirty ice machine may be taken
apart for cleaning and sanitizing.
! Caution
Use only Manitowoc approved Ice Machine Cleaner
(part number 94-0546-3) and Sanitizer (part number
94-0565-3). It is a violation of Federal law to use
these solutions in a manner inconsistent with their
labeling. Read and understand all labels printed on
bottles before use.
! Caution
Do not mix Cleaner and Sanitizer solutions together.
It is a violation of Federal law to use these solutions
in a manner inconsistent with their labeling.
! Warning
Wear rubber gloves and safety goggles (and/or face
shield) when handling ice machine Cleaner or
Sanitizer.
Part No. 80-1100-3
MANITOWOC’S PATENTED CLEANING OR
SANITIZING TECHNOLOGY
Manitowoc Ice Machines include technology that allows
the initiation and completion of a cleaning or sanitizing
cycle at the flip of a switch. This cycle will permit
cleaning or sanitizing of all surfaces that come in contact
with the water distribution system. Periodic maintenance
must be performed that includes sanitizing the bin (or
dispenser) and adjacent surface areas, which cannot be
contacted by the water distribution system.
This technology will also allow initiation and completion
of a clean or sanitize cycle, after which the ice machine
automatically starts ice making again.
Refer to the cleaning or sanitizing procedure for
complete details.
The AuCS Accessory can be set to automatically start
and finish a clean or sanitize cycle every 2, 4, or 12
weeks. This accessory monitors ice-making cycles and
initiates a cleaning or sanitizing cycle automatically.
Refer to Automatic Cleaning System (AuCS) Accessory
for further details.
ALPHASAN
The goal of AlphaSan is to keep the plastic surfaces of
an ice machine cleaner, by reducing or delaying the
formation of bio-film. The active ingredient in
AlphaSan is the element silver in the form of silver ions
(Ag+). AlphaSan slowly releases silver ions via an ion
exchange mechanism. When AlphaSan is
compounded directly into a plastic part, a controlled
release of silver ions from the surface is regulated to
maintain an effective concentration at or near the
surface of the plastic ice machine part. AlphaSan’s
unique ability to effectively control the release of silver
not only protects against undesired discoloration of the
plastic, but also will last the life of the plastic part.
Although AlphaSan helps prevent bio-film build up it
does not eliminate the need for periodic cleaning and
maintenance. AlphaSan has no adverse effect on the
taste of the ice or beverage.
3-5
Maintenance
Section 3
CLEANING PROCEDURE
Ice machine cleaner is used to remove lime scale or
other mineral deposits. It is not used to remove algae or
slime. Refer to the section on Sanitizing for removal of
algae and slime.
Step 1 Set the toggle switch to the OFF position after
ice falls from the evaporator at the end of a Harvest
cycle. Or, set the switch to the OFF position and allow
the ice to melt off the evaporator.
! Caution
Never use anything to force ice from the evaporator.
Damage may result.
Step 2 To start cleaning, place the toggle switch in the
CLEAN position. The water will flow through the water
dump valve and down the drain. The Clean light will turn
on to indicate the ice machine is in the Cleaning mode.
Step 3 Wait about one minute or until water starts to
flow over the evaporator.
Step 4 Add the proper amount of Manitowoc Ice
Machine Cleaner to the water trough.
Model
Q200 Q280 Q320 Q370
Q420 Q450 Q600 Q800
Q1000 Q1300
Q1600 Q1800
3-6
Amount of Cleaner
3 ounces (90 ml)
5 ounces (150 ml)
9 ounces (270 ml)
Step 5 The ice machine will automatically time out a
ten minute cleaning cycle, followed by six rinse cycles,
and stop. The Clean light will turn off to indicate the
Cleaning mode is completed. This entire cycle lasts
approximately 25 minutes.
Step 6 When the cleaning process stops, move the
toggle switch to OFF position. Refer to “Sanitizing
Procedure” on the next page.
Step 7
A. The ice machine may be set to start and finish a
cleaning procedure then automatically start ice
making again.
B. You must wait about one minute into the
cleaning cycle (until water starts to flow over the
evaporator) then move the switch from CLEAN
to ICE position.
C. When the cleaning cycle is completed, an ice
making sequence will start automatically.
Important
After the toggle switch is moved to the ICE position,
opening the curtain switch will interrupt the cleaning
sequence. The sequence will resume from the point
of interruption when the curtain switch closes.
Part No. 80-1100-3
Section 3
Maintenance
SANITIZING PROCEDURE
Use sanitizer to remove algae or slime. Do not use it to
remove lime scale or other mineral deposits.
Step 1 Set the toggle switch to the OFF position after
ice falls from the evaporator at the end of a Harvest
cycle. Or, set the switch to the OFF position and allow
the ice to melt off the evaporator.
Step 4 Use the sanitizing solution and a sponge or
cloth to sanitize (wipe) all parts and interior surfaces of
the ice machine. Sanitize the following areas:
A. Side walls
B. Base (area above water trough)
C. Evaporator plastic parts
! Caution
Never use anything to force ice from the evaporator.
Damage may result.
D. Bin or dispenser
Step 5 Rinse all sanitized areas with clear water.
Step 6 Install the removed parts, restore power and
place toggle switch in the ice position.
! Warning
Disconnect electric power to the ice machine (and
dispenser if applicable) at the electric switch box
before proceeding.
Step 2 Refer to Removal of Parts For Cleaning/
Sanitizing and remove ice machine parts.
Step 3 Mix a solution of water and sanitizer.
Solution Type
Sanitizer
Part No. 80-1100-3
Water
4 gal. (15 l)
Mixed With
3 oz (90 ml) sanitizer
3-7
Maintenance
Section 3
AUTOMATIC CLEANING SYSTEM (AuCS)
This accessory monitors ice making cycles and initiates
cleaning (or sanitizing) procedures automatically. The
AuCS Accessory can be set to automatically clean or
sanitize the ice machine every 2, 4, or 12 weeks.
Manual Start Operation
Step 1 Set the toggle switch to the OFF position after
ice falls from the evaporator at the end of a Harvest
cycle. Or, set the switch to the OFF position and allow
the ice to melt off the evaporator.
! Caution
Refer to the AuCS Accessory Installation - Use
and Care Manual for complete details on the
installation, operation, maintenance and cautionary
statements of this accessory.
Automatic Operation
The following occurs when the toggle switch is in the ICE
position:
•
The ice machine control board counts the number of
ice harvest cycles.
•
The AuCS accessory interrupts the ice making
mode and starts the cleaning (or sanitizing) mode
when the harvest count equals the “Frequency of
Cleaning” setting of the AuCS.
•
When the automatic cleaning (or sanitizing) cycle is
complete (approximately 25 minutes), ice making
resumes automatically, and the “Harvest Count” is
reset to zero.
Important
Opening the curtain switch will interrupt the cleaning
or sanitizing sequence. The sequence will resume
from the point of interruption when the curtain recloses.
! Caution
Never use anything to force ice from the evaporator.
Damage may result.
Step 2 To start the automatic cleaning system, move
the toggle switch to the CLEAN position. The water will
flow through the water dump valve and down the drain.
The Clean light will turn on to indicate the ice machine is
in the Self Cleaning mode. The AuCS then
automatically adds cleaner or sanitizer to the ice
machine.
Step 3 The ice machine will automatically time out a
ten minute cleaning or sanitizing cycle, followed by six
rinse cycles, (de-energize the Clean light) and stop. This
entire cycle lasts approximately 25 minutes.
Step 4 After the cleaning or sanitizing cycle stops,
move the toggle switch to ICE position.
Step 5
A. The ice machine may be set to start and finish a
cleaning or sanitizing cycle, then automatically
start ice making again.
B. You must wait about one minute into the
cleaning cycle (until water starts to flow over the
evaporator), then move the toggle switch from
CLEAN to ICE position.
C. When the cleaning or sanitizing cycle is
completed, the clean light will turn off and an ice
making sequence will start automatically.
3-8
Part No. 80-1100-3
Section 3
Maintenance
REMOVAL OF PARTS FOR CLEANING/SANITIZING
1. Turn off the water supply to the ice machine at the
water service valve.
4. Use a soft-bristle brush or sponge (NOT a wire
brush) to carefully clean the parts.
! Caution
! Warning
Disconnect electric power to the ice machine at the
electric switch box before proceeding.
2. Remove the water curtain and the components you
want to clean or sanitize. See the following pages for
removal procedures for these parts.
! Warning
Wear rubber gloves and safety goggles (and/or face
shield) when handling Ice Machine Cleaner or
Sanitizer.
3. Soak the removed part(s) in a properly mixed
solution.
Solution Type
Cleaner
Sanitizer
Water
1 gal. (4 l)
4 gal. (15 l)
Mixed With
16 oz (500 ml) cleaner
1 oz (30 ml) sanitizer
Do not mix Cleaner and Sanitizer solutions together.
It is a violation of Federal law to use these solutions
in a manner inconsistent with their labeling.
! Caution
Do not immerse the water pump motor in the
cleaning or sanitizing solution.
5. Use the solution and a brush to clean the top, sides,
and bottom evaporator extrusions; the inside of the
ice machine panels; and the entire inside of the bin.
6. Thoroughly rinse all of the parts and surfaces with
clean water.
7. Install the removed parts.
NOTE: Incomplete rinsing of the ice thickness probe or
water level probe may leave a residue. This could cause
the ice machine to malfunction. For best results, brush or
wipe the probes off while rinsing it. Thoroughly dry the
probes before installing them.
8. Turn on the water and electrical supply.
Part No. 80-1100-3
3-9
Maintenance
Section 3
Water Dump Valve
The water dump valve normally does not require
removal for cleaning. To determine if removal is
necessary:
1. Locate the water dump valve.
2. Set the toggle switch to ICE.
3. While the ice machine is in the freeze mode, check
the dump valve’s clear plastic outlet drain hose for
leakage.
A. If the dump valve is leaking, remove,
disassemble and clean it.
B. If the dump valve is not leaking, do not remove
it. Instead, follow the “Cleaning Procedure” on
Page 3-5.
Figure 3-7. Dump Valve Removal
Follow the procedure below to remove the dump valve.
Important
! Warning
Disconnect the electric power to the ice machine at
the electric service switch box and turn off the water
supply before proceeding.
1. If so equipped, remove the water dump valve shield
from its mounting bracket.
2. Lift and slide the coil retainer cap from the top of the
coil.
3. Note the position of the coil assembly on the valve
for assembly later. Leaving the wires attached, lift
the coil assembly off the valve body and the
enclosing tube.
4. Press down on the plastic nut on the enclosing tube
and rotate it 1/4 turn. Remove the enclosing tube,
plunger, and plastic gasket from the valve body.
NOTE: At this point, the water dump valve can easily be
cleaned. If complete removal is desired, continue with
step 5.
The plunger and the inside of the enclosing tube
must be completely dry before assembly.
NOTE: During cleaning, do not stretch, damage or
remove the spring from the plunger. If it is removed, slide
the spring’s flared end into the plunger’s slotted top
opening until the spring contacts the plunger spring stop.
5. Remove the valve body.
6. Remove the tubing from the dump valve by twisting
the clamps off.
7. Remove the two screws securing the dump valve
and the mounting bracket.
CAP
PLUNGER
SPRING STOP
COIL
SPRING
PLUNGER
ENCLOSING
TUBE
DIAPHRAM
VALVE BODY
Figure 3-8. Dump Valve Disassembly
3-10
Part No. 80-1100-3
Section 3
Maintenance
Ice Thickness Probe
Water Pump
1. Compress the side of the ice thickness probe near
the top hinge pin and remove it from the bracket.
! Warning
Disconnect the electric power to the ice machine at
the electric service switch box and turn off the water
supply.
1. Disconnect the water pump power cord.
DISCONNECT
WIRE LEAD
COMPRESS
HINGE PIN TO
REMOVE
POWER
CORD
LOOSEN
SCREWS
WATER
PUMP
ICE
THICKNESS
PROBE
SV1619
Figure 3-10. Ice Thickness Probe Removal
NOTE: At this point, the ice thickness probe can easily
be cleaned. If complete removal is desired, continue with
step 2 below.
PUMP
OUTLET
SV1618
! Warning
Disconnect the electric power to the ice machine at
the electric service switch box.
Figure 3-9. Water Pump Removal
2. Disconnect the hose from the pump outlet.
3. Loosen the screws securing the pump mounting
bracket to the bulkhead.
4. Lift the pump and bracket assembly off the screws.
2. Disconnect the wire lead from the control board
inside the electrical control box.
Ice Thickness Probe Cleaning
1. Mix a solution of Manitowoc ice machine cleaner
and water (2 ounces of cleaner to 16 ounces of
water) in a container.
2. Soak ice thickness probe in container of cleaner/
water solution while disassembling and cleaning
water circuit components (soak ice thickness probe
for 10 minutes or longer).
3. Clean all ice thickness probe surfaces including all
plastic parts (do not use abrasives). Verify the ice
thickness probe cavity is clean. Thoroughly rinse ice
thickness probe (including cavity) with clean water,
then dry completely. Incomplete rinsing and
drying of the ice thickness probe can cause
premature harvest.
4. Reinstall ice thickness probe, then sanitize all ice
machine and bin/dispenser interior surfaces.
Part No. 80-1100-3
3-11
Maintenance
Section 3
Water Level Probe
1. Loosen the screw that holds the water level probe in
place. The probe can easily be cleaned at this point
without proceeding to step 2.
! Warning
Disconnect the electrical power to the ice machine
at the electrical disconnect before proceeding.
2. If complete removal is required, disconnect the wire
lead from the control board inside the electrical
control box.
Follow the procedure below to remove the water inlet
valve.
! Warning
Disconnect the electric power to the ice machine at
the electric service switch box and turn off the water
supply before proceeding.
1. Remove the valve shield if necessary.
2. Remove the filter access screws that hold the valve
in place.
NOTE: The water inlet valve can be disassembled and
cleaned without disconnecting the incoming water
supply line to the ice machine.
3. Remove, clean, and install the filter screen.
SCREW
4. If necessary, remove the enclosure tube access
screws to clean interior components.
WATER
LEVEL
PROBE
WATER
TROUGH
WIRE
LEAD
ICE
MACHINE
SIDE
PANEL
FILTER
ACCESS
SCREWS
INCOMING
WATER
LINE
WATER
INLET
VALVE
SV1621
SV1622
Figure 3-11. Water Level Probe Removal
Figure 3-12. Water Inlet Valve Removal
Water Inlet Valve
The water inlet valve normally does not require removal
for cleaning. Follow the instructions below to determine if
removal is necessary.
ENCLOSURE TUBE
ACCESS SCREWS
ELECTRICAL
SOLENOID
1. Set the ICE/OFF/CLEAN switch to OFF. Locate the
water inlet valve (in the compressor area of the ice
machine). It pours water into the water trough.
2. When the ice machine is off, the water inlet valve
must completely stop water flow into the machine.
Watch for water flow. If water flows, remove,
disassemble and clean the valve.
3. When the ice machine is on, the water inlet valve
must allow the proper water flow through it. Set the
toggle switch to ON. Watch for water flow into the ice
machine. If the water flow is slow or only trickles into
the ice machine, remove, disassemble, and clean
the valve.
3-12
RESTRICTOR
(FLAT SIDE MUST
FACE OUT)
MOUNTING
PLATE
FILTER
ACCESS
SCREWS
ENCLOSURE
TUBE
SPRING
FITTING
O-RING
VALVE
BODY
FILTER
SCREEN
PIN
RUBBER
SEAL
SV1623
Figure 3-13. Exploded View of Water Inlet Valve
Part No. 80-1100-3
Section 3
Maintenance
Water Curtain
Water Distribution Tube
1. Disconnect the water hose from the distribution
tube.
3
1. LIFT UP
2. SLIDE BACK
3. SLIDE TO RIGHT
1. Gently flex the curtain in the center and remove it
from the right side.
2
1
DISTRIBUTION
TUBE
THUMBSCREW
STEP 1
LOCATING
PIN
STEP 2
THUMBSCREW
SV1213
SV1620
Figure 3-14. Water Distribution Tube Removal
1. Loosen the two thumbscrews which secure the
distribution tube.
Figure 3-16. Water Curtain Removal
2. Slide the left pin out.
2. Lift the right side of the distribution tube up off the
locating pin, then slide it back and to the right.
! Caution
Do not force this removal. Be sure the locating pin is
clear of the hole before sliding the distribution tube
out.
3. Disassemble for cleaning.
A. Twist both of the inner tube ends until the tabs
line up with the keyways.
B. Pull the inner tube ends outward.
INNER TUBE
TAB
INNER TUBE
KEYWAY
SV1211
Figure 3-15. Water Distribution Tube Disassembly
Part No. 80-1100-3
3-13
Maintenance
Section 3
Water Treatment/Filtration
3. Unscrew the housing from the cap.
GENERAL
4. Remove the used filter cartridge from the housing
and discard it.
Local water conditions may require the installation of a
water treatment system to inhibit scale formation, filter
out sediment, and remove chlorine taste and odor.
Consult your local distributor for information on
Manitowoc’s full line of NSF-certified Tri-Liminator
filtration systems.
FILTER REPLACEMENT PROCEDURE
Tri-Liminator systems include a pre-filter and a primary
filter. For maximum filtration efficiency, replace the
primary filter cartridge every six months. If the filter
gauge reading drops below 20 psig prior to six months
usage, replace the pre-filter first.
1. Turn off the water supply at the inlet shutoff valve.
PRESSURE
RELEASE BUTTON
CAP
5. Remove the O-ring from the housing groove. Wipe
the housing groove and the O-ring clean.
6. Lubricate the O-ring with petroleum jelly.
7. Press the O-ring into the housing groove.
8. Insert a new filter cartridge into the housing. Make
sure it slips down over the housing standpipe.
9. Screw the housing on to the cap and carefully handtighten it.
! Caution
Hand-tighten only. Do not overtighten. Do not use a
spanner wrench.
10. Repeat steps 3-9 for each filter housing.
11. Turn on the water supply to allow the housing and
filter to slowly fill with water.
SHUT OFF
VALVE
SEAL
CARTRIDGE
12. Depress the pressure release button to release
trapped air from the housing.
O-RING
13. Check for leaks.
OUTLET SIDE
INLET SIDE
PRE-FILTER
HOUSING
PRIMARY
FILTER
SEAL
Figure 3-17. Typical Tri-Liminator
Water Filtration System
2. Depress the pressure release button to relieve the
pressure.
3-14
Part No. 80-1100-3
Section 3
Maintenance
Removal from Service/Winterization
GENERAL
Special precautions must be taken if the ice machine is
to be removed from service for an extended period of
time or exposed to ambient temperatures of 32°F (0°C)
or below.
! Caution
WATER-COOLED ICE MACHINES
1. Perform steps 1-6 under “Self-Contained Air-Cooled
Ice Machines.”
2. Disconnect the incoming water and drain lines from
the water-cooled condenser.
3. Insert a large screwdriver between the bottom spring
coils of the water regulating valve. Pry upward to
open the valve.
If water is allowed to remain in the ice machine in
freezing temperatures, severe damage to some
components could result. Damage of this nature is
not covered by the warranty.
Follow the applicable procedure below.
SELF-CONTAINED AIR-COOLED ICE MACHINES
1. Disconnect the electric power at the circuit breaker
or the electric service switch.
2. Turn off the water supply.
3. Remove the water from the water trough.
4. Disconnect and drain the incoming ice-making water
line at the rear of the ice machine.
5. Blow compressed air in both the incoming water and
the drain openings in the rear of the ice machine
until no more water comes out of the inlet water lines
or the drain.
6. Make sure water is not trapped in any of the water
lines, drain lines, distribution tubes, etc.
SV1624
Figure 3-18. Pry Open the Water Regulating Valve
4. Hold the valve open and blow compressed air
through the condenser until no water remains.
REMOTE ICE MACHINES
1. Move the ICE/OFF/CLEAN switch to OFF.
2. “Frontseat” (shut off) the receiver service valves.
Hang a tag on the switch as a reminder to open the
valves before restarting.
3. Perform steps 1-6 under “Self-Contained Air-Cooled
Ice Machines.”
AUCS Accessory
Refer to the AuCS Accessory manual for winterization
of the AuCS Accessory.
Part No. 80-1100-3
3-15
Maintenance
Section 3
THIS PAGE INTENTIONALLY LEFT BLANK
3-16
Part No. 80-1100-3
Section 4
Ice Machine Sequence of Operation
Self-Contained Air- and Water-Cooled
Q200/Q280/Q320/Q370/Q420/Q450/Q600/Q800/Q1000/Q1300/Q1600/Q1800
INITIAL START-UP OR START-UP AFTER
AUTOMATIC SHUT-OFF
1. Water Purge
Before the compressor starts, the water pump and water
dump solenoid are energized for 45 seconds, to
completely purge the ice machine of old water. This
feature ensures that the ice making cycle starts with
fresh water.
The harvest valve(s) is also energized during water
purge, although it stays on for an additional 5 seconds
(50 seconds total on time) during the initial refrigeration
system start-up.
2. Refrigeration System Start-Up
The compressor starts after the 45 second water purge,
and it remains on throughout the entire Freeze and
Harvest Sequences. The water fill valve is energized at
the same time as the compressor. It remains on until the
water level sensor closes for 3 continuous seconds, or
until a six-minute time period has expired. (See “Water
Inlet Valve Safety Shutoff,” Page 6-50.) The harvest
valve(s) remains on for 5 seconds during initial
compressor start-up and then shuts off.
FREEZE SEQUENCE
3. Prechill
The compressor is on for 30 seconds prior to water flow,
to prechill the evaporator.
4. Freeze
The water pump restarts after the 30 second prechill. An
even flow of water is directed across the evaporator and
into each cube cell, where it freezes. The water fill valve
will cycle on and then off one more time to refill the water
trough.
When sufficient ice has formed, the water flow (not the
ice) contacts the ice thickness probe. After
approximately 7 seconds of continual water contact, the
harvest sequence is initiated. The ice machine cannot
initiate a harvest sequence until a 6 minute freeze lock
has been surpassed.
At the same time the compressor starts, the condenser
fan motor (air-cooled models) is supplied with power
throughout the entire Freeze and Harvest Sequences.
The fan motor is wired through a fan cycle pressure
control, therefore it may cycle on and off. (The
compressor and condenser fan motor are wired through
the contactor. As a result, anytime the contactor coil is
energized, the compressor and fan motor are supplied
with power.)
Figure 4-1. Freeze Sequence
(Typical Q450 Shown)
Continued on next page …
Part No. 80-1100-3
4-1
Ice Machine Sequence of Operation
Section 4
HARVEST SEQUENCE
AUTOMATIC SHUT-OFF
5. Water Purge
7. Automatic Shut-Off
The water pump continues to run, and the water dump
valve energizes for 45 seconds to purge the water in the
sump trough. The water fill valve energizes (turns on)
and de-energizes (turns off) strictly by time. The water fill
valve energizes for the last 15 seconds of the 45-second
water purge. The water purge must be at the factory
setting of 45 seconds for the fill valve to energize during
the last 15 seconds of the Water Purge. If set at less
than 45 seconds the water fill valve does not energize
during the water purge.
When the storage bin is full at the end of a harvest
sequence, the sheet of cubes fails to clear the water
curtain and will hold it open. After the water curtain is
held open for 7 seconds, the ice machine shuts off. The
ice machine remains off for 3 minutes before it can
automatically restart.
After the 45 second water purge, the water fill valve,
water pump and dump valve de-energize. (Refer to
“Water Purge Adjustment” on Page 3-3 for details.) The
harvest valve also opens at the beginning of the water
purge to divert hot refrigerant gas into the evaporator.
The ice machine remains off until enough ice has been
removed from the storage bin to allow the ice to fall clear
of the water curtain. As the water curtain swings back to
the operating position, the bin switch re-closes and the
ice machine restarts (steps 1 - 2), provided the 3 minute
delay period is complete.
6. Harvest
The harvest valve(s) remains open and the refrigerant
gas warms the evaporator causing the cubes to slide, as
a sheet, off the evaporator and into the storage bin. The
sliding sheet of cubes swings the water curtain out,
opening the bin switch. The momentary opening and reclosing of the bin switch terminates the harvest
sequence and returns the ice machine to the freeze
sequence (Step 3 - 4.)
Figure 4-3. Automatic Shut-Off (Typical Q450
Shown)
Figure 4-2. Harvest Sequence (Typical Q450 Shown)
4-2
Part No. 80-1100-3
Section 4
Ice Machine Sequence of Operation
Remote
Q450/Q600/Q800/Q1000/Q1300/Q1600/Q1800
INITIAL START-UP OR START-UP AFTER
AUTOMATIC SHUT-OFF
1. Water Purge
Before the compressor starts, the water pump and water
dump solenoid are energized for 45 seconds, to
completely purge the ice machine of old water. This
feature ensures that the ice making cycle starts with
fresh water.
The harvest valve and harvest pressure regulating
(HPR) solenoid valves also energize during water purge,
although they stay on for an additional 5 seconds (50
seconds total on time) during the initial refrigeration
system start-up.
2. Refrigeration System Start-Up
The compressor and liquid line solenoid valve energize
after the 45 second water purge and remain on
throughout the entire Freeze and Harvest Sequences.
The water fill valve is energized at the same time as the
compressor. It remains on until the water level sensor
closes for 3 continuous seconds, or until a six-minute
time period has expired. (See “Water Inlet Valve Safety
Shutoff,” Page 6-50.). The harvest valve and HPR
solenoid valves remain on for 5 seconds during initial
compressor start-up and then shut off.
FREEZE SEQUENCE
3. Prechill
The compressor is on for 30 seconds prior to water flow,
to prechill the evaporator.
4. Freeze
The water pump restarts after the 30 second prechill. An
even flow of water is directed across the evaporator and
into each cube cell, where it freezes. The water fill valve
will cycle on and then off one more time to refill the water
trough. (See Page 4-1.)
When sufficient ice has formed, the water flow (not the
ice) contacts the ice thickness probe. After
approximately 7 seconds of continual water contact, the
harvest sequence is initiated. The ice machine cannot
initiate a harvest sequence until a 6 minute freeze lock
has been surpassed.
The remote condenser fan motor starts at the same time
the compressor starts and remains on throughout the
entire Freeze and Harvest Sequences. (The compressor
and condenser fan motor are wired through the
contactor, therefore, anytime the contactor coil is
energized, the compressor and fan motor are on.)
Figure 4-4. Freeze Sequence (Typical Q450 Shown)
Continued on next page …
Part No. 80-1100-3
4-3
Ice Machine Sequence of Operation
Section 4
HARVEST SEQUENCE
AUTOMATIC SHUT-OFF
5. Water Purge
7. Automatic Shut-Off
The water pump continues to run, and the water dump
valve energizes for 45 seconds to purge the water in the
sump trough. The water fill valve energizes (turns on)
and de-energizes (turns off) strictly by time. The water fill
valve energizes for the last 15 seconds of the 45-second
water purge. The water purge must be at the factory
setting of 45 seconds for the fill valve to energize during
the last 15 seconds of the Water Purge. If set at less
than 45 seconds the water fill valve does not energize
during the water purge.
When the storage bin is full at the end of a harvest
sequence, the sheet of cubes fails to clear the water
curtain and will hold it open. After the water curtain is
held open for 7 seconds, the ice machine shuts off. The
ice machine remains off for 3 minutes before it can
automatically restart.
After the 45 second water purge, the water fill valve,
water pump and dump valve de-energize. (Refer to
“Water Purge Adjustment” on Page 3-3 for details.) The
harvest valve(s) and HPR solenoid valve also open at
the beginning of the water purge.
The ice machine remains off until enough ice has been
removed from the storage bin to allow the ice to drop
clear of the water curtain. As the water curtain swings
back to the operating position, the bin switch re-closes
and the ice machine restarts (steps 1 - 2) provided the 3
minute delay period is complete.
6. Harvest
The HPR valve and the harvest valve(s) remain open
and the refrigerant gas warms the evaporator causing
the cubes to slide, as a sheet, off the evaporator and into
the storage bin. The sliding sheet of cubes swings the
water curtain out, opening the bin switch. The
momentary opening and re-closing of the bin switch
terminates the harvest sequence and returns the ice
machine to the freeze sequence (Step 3 - 4.)
Figure 4-6. Automatic Shut-Off (Typical Q450
Shown)
Figure 4-5. Harvest Sequence (Typical Q450 Shown)
4-4
Part No. 80-1100-3
Section 5
Water System Ice Making Sequence of Operation
NOTE: The sequence of operation is the same for selfcontained and remote models.
INITIAL START-UP OR START-UP AFTER
AUTOMATIC SHUT-OFF
1. Before the ice machine starts, the water pump and
water dump solenoid are energized for 45 seconds
to purge old water from the water trough. This
ensures that the ice-making cycle starts with fresh
water. The water fill valve energizes after the 45second water purge, and remains on until the water
level probe is satisfied.
FREEZE CYCLE
3. The water pump starts after the 30-second pre-chill.
An even flow of water is directed across the
evaporator and into each cube cell.
During the first 45 seconds of the Freeze Cycle, the
water fill valve cycles on and off as many times as
needed to refill the water trough.
After the 45 seconds, the water fill valve cycles on
and off one more time to refill the water trough. The
water fill valve then remains off for the duration of
the Freeze Cycle.
WATER INLET VALVE SAFETY SHUT-OFF
2. To pre-chill the evaporator, there is no water flow
over the evaporator for the first 30 seconds of the
freeze cycle.
This feature limits the water inlet valve to a six-minute on
time. Regardless of the water level probe input, the
control board automatically shuts off the water inlet valve
if it remains on for 6 continuous minutes.
WATER INLET VALVE
TO DISTRIBUTION TUBE
WATER PUMP
WATER DUMP VALVE
TO DRAIN
SV1677
Figure 5-1. Water Flow Over the Evaporator
Part No. 80-1100-3
5-1
Water System Ice Making Sequence of Operation
Section 5
AUTOMATIC SHUT-OFF
HARVEST CYCLE
4. The water pump and water dump solenoid are
energized for 45 seconds to purge the water from
the water trough. The water fill valve energizes for
the last 15 seconds of the 45-second purge cycle, to
flush sediment from the bottom of the water trough.
There is no water flow during an automatic shut-off.
5. After the 45-second purge, the water pump and
water dump valve de-energize.
WATER INLET VALVE
TO DISTRIBUTION TUBE
WATER PUMP
WATER DUMP VALVE
TO DRAIN
SV1677
Figure 5-2. Water Flow Down the Drain
5-2
Part No. 80-1100-3
Section 6
Electrical System
Energized Parts Charts
SELF-CONTAINED AIR- AND WATER-COOLED MODELS
Ice Making
Sequence Of
Operation
START-UP 1
1. Water Purge
2. Refrigeration
System
Start-Up
FREEZE
SEQUENCE
3. Pre-Chill
4. Freeze
1
Water
Pump
Control Board Relays
3
4
Water
Water Fill
Harvest
Dump
Valve
Valve(s)
Valve
2
Contactor
5
5A
5B
Contactor
Coil
Compressor
Condenser
Fan Motor
Length
Of Time
On
Off
On
On
Off
Off
Off
45 Seconds
Off
On
On
Off
On
On
May Cycle
On/Off
5 Seconds
Off
Off
On
On
May Cycle
On/Off
30 Seconds
Until 7 sec.
water contact
with ice
thickness probe
Off
On
May cycle On/
Off during first
45 sec.
----------Cycles On,
then Off 1
more time
Off
Off
On
On
May Cycle
On/Off
Locked Out
After Six
Minutes
HARVEST
SEQUENCE
5. Water Purge
On
30 sec. Off,
15 sec. On
On
On
On
On
May Cycle
On/Off
Factory-set at
45 Seconds
6. Harvest
Off
Off
On
Off
On
On
May Cycle
On/Off
7. AUTOMATIC
SHUT-OFF
Off
Off
Off
Off
Off
Off
Off
Bin switch
activation
Until bin switch
re-closes
1. Initial Start-Up or Start-Up After Automatic Shut-Off
Condenser Fan Motor
FREEZE SEQUENCE
The fan motor is wired through a fan cycle pressure
control, therefore, it may cycle on and off.
•
The ice machine is locked into the freeze cycle for
the first 6 minutes, not allowing the ice thickness
probe to initiate a harvest sequence.
•
The maximum freeze time is 60 minutes, at which
time the control board automatically initiates a
harvest sequence (steps 5-6).
Harvest Water Purge
The circuit board has an adjustable water purge in the
harvest cycle. This permits a 15, 30 or 45 second purge
cycle.
Auto Shut-Off
The ice machine remains off for 3 minutes before it can
automatically restart. The ice machine restarts (steps 12) immediately after the delay period, if the bin switch recloses prior to 3 minutes.
Safety Timers
HARVEST SEQUENCE
The maximum harvest time is 3-1/2 minutes, at which
time the control board automatically terminates the
harvest sequence. If the bin switch is open, the ice
machine will go to automatic shut-off (step 7). If the bin
switch is closed, the ice machine will go to the freeze
sequence (steps 3-4).
The control board has the following non-adjustable
safety timers:
Part No. 80-1100-3
6-1
Electrical System
Section 6
REMOTE MODELS
1
Ice Making
Sequence Of
Operation
START-UP 1
1. Water Purge
2. Refrigeration
System
Start-Up
FREEZE
SEQUENCE
3. Pre-Chill
2
Control Board Relays
3
4
a. Harvest
Valve(s)
Contactor
Water
Dump
Valve
5
a.
Contactor
Coil
b. Liquid
Line
Solenoid
5A
5B
Compressor
Condenser
Fan Motor
Length
Of Time
Water
Pump
Water Fill
Valve
On
Off
On
On
Off
Off
Off
45 Seconds
Off
On
On
Off
On
On
On
5 Seconds
Off
Off
On
On
On
30 Seconds
Until 7 sec.
water
contact with
ice thickness
probe
Off
4. Freeze
On
HARVEST
SEQUENCE
5. Water Purge
On
6. Harvest
7. AUTOMATIC
SHUT-OFF
May cycle
On/Off during
first 45 sec.
-----------Cycles On,
then Off 1
more time
Locked Out
After Six
Minutes
b. HPR
Solenoid
Off
Off
On
On
On
30 sec. Off,
15 sec. On
On
On
On
On
On
Off
Off
On
Off
On
On
On
Off
Off
Off
Off
Off
Off
Off
Factory-set
at 45
Seconds
Bin switch
activation
Until bin
switch recloses
1. Initial Start-Up or Start-Up After Automatic Shut-Off
Auto Shut-Off
FREEZE SEQUENCE
The ice machine remains off for 3 minutes before it can
automatically restart. The ice machine restarts (steps 12) immediately after the delay period, if the bin switch recloses prior to 3 minutes.
•
The ice machine is locked into the freeze cycle for
the first 6 minutes, not allowing the ice thickness
probe to initiate a harvest sequence.
•
The maximum freeze time is 60 minutes, at which
time the control board automatically initiates a
harvest sequence (steps 5-6).
Harvest Water Purge
The circuit board has an adjustable water purge in the
harvest cycle. This permits a 15, 30 or 45 second purge
cycle.
Safety Timers
The control board has the following non-adjustable
safety timers:
6-2
HARVEST SEQUENCE
•
The maximum harvest time is 3-1/2 minutes, at which
time the control board automatically terminates the
harvest sequence. If the bin switch is open, the ice
machine will go to automatic shut-off (step 7). If the
bin switch is closed, the ice machine will go to the
freeze sequence (steps 3-4).
Part No. 80-1100-3
Section 6
Electrical System
Wiring Diagram Sequence of
Operation
SELF-CONTAINED MODELS
SEE SERIAL PLATE FOR VOLTAGE
L2 (N)
L1
(61)
WATER
VALVE
(60)
Initial Start-Up or Start-Up After
Automatic Shut-Off
HIGH PRES
CUTOUT
(77)
2
1
(76)
3
(57)
(58)
(59)
TERMINATES AT
PIN CONNECTION
(73)
ICE THICKNESS PROBE
1C
NOT USED
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
WATER LEVEL
(62)
The harvest valve(s) is also
energized during the water purge. In
the case of an initial refrigeration
start-up, it stays on for an additional
5 seconds (50 seconds total).
BIN SWITCH LIGHT
(63)
(64)
BIN SWITCH
TB30
TB30
1F
1G
(74)
CONTACTOR
COIL
(56)
WATER LEVEL PROBE
TB30
WATER
PUMP
TB37
TB30
(99)
(98)
TB31
TRANS.
FUSE (7A)
(75)
(81)
DUMP
SOLENOID
5
Before the compressor starts, the
water pump and water dump
solenoid are energized for 45
seconds to purge old water from the
ice machine. This ensures that the
ice-making cycle starts with fresh
water.
(80)
HARVEST
SOLENOID
4
1. WATER PURGE
(22)
(21)
(20)
(55)
TB32
TB35
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
TOGGLE SWITCH
(68)
(69)
(67)
(66)
68
INTERNAL WORKING
VIEW
OFF
(66)
(62)
VIEW FOR WIRING
ICE
66
67
62
CLEAN
69
(49)
COMPRESSOR
(47)
R
CONTACTOR
CONTACTS
TB35
*OVERLOAD
(42)
S
RUN CAPACITOR
(46)
R
R
(50)
C
(48)
TB30
(45)
L1
(51)
(52)
(85)
(86)
TB33
PTCR
(53)
TB34
FAN CYCLE CONTROL
TB30
RUN CAPACITOR**
FAN MOTOR
(AIR COOLED ONLY)
SV1646-1
Figure 6-1. Self-Contained — Water Purge
Table 6-1. Self-Contained Models
1. Water Purge (45 Seconds)
Toggle Switch
Bin Switch
Control Board Relays
#1
Water Pump
#2
Water Fill Valve
#3
Harvest Solenoid
#4
Water Dump Valve
#5
Contactor Coil
Compressor
Condenser Fan Motor
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-Out
Main Fuse (On Control Board)
Part No. 80-1100-3
ICE
Closed
Closed / ON
Open / OFF
Closed / ON
Closed / ON
Open / OFF
OFF
OFF
Closed
Closed
6-3
Electrical System
Section 6
2. REFRIGERATION SYSTEM
START-UP
The compressor starts after the 45second water purge, and it remains
on throughout the Freeze and
Harvest cycles.
SEE SERIAL PLATE FOR VOLTAGE
L2 (N)
L1
(61)
WATER
VALVE
(60)
HIGH PRES
CUTOUT
(77)
2
1
(57)
(58)
(59)
TERMINATES AT
PIN CONNECTION
(73)
ICE THICKNESS PROBE
1C
NOT USED
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
WATER LEVEL
(62)
BIN SWITCH LIGHT
(63)
(64)
BIN SWITCH
TB30
TB30
1F
1G
(74)
CONTACTOR
COIL
(56)
WATER LEVEL PROBE
TB30
WATER
PUMP
TB37
TB30
(99)
(98)
TB31
TRANS.
FUSE (7A)
(75)
(81)
DUMP
SOLENOID
5
At the same time the compressor
starts, the condenser fan motor (aircooled models) is supplied with
power. It continues to be supplied
with power throughout the Freeze
and Harvest cycles.
The fan motor is wired through a fan
cycle pressure control, and may
cycle on and off. (The compressor
and the condenser fan motor are
wired through the contactor. Any time
the contactor coil is energized, these
components are supplied with
power.)
(76)
3
The harvest valve(s) remains on for
the first 5 seconds of the initial
compressor start-up.
(80)
HARVEST
SOLENOID
4
The water fill valve is energized at
the same time as the compressor. It
remains on until the water level
sensor closes for 3 continuous
seconds.
(22)
(21)
(20)
(55)
TB32
TB35
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
TOGGLE SWITCH
(68)
(69)
(67)
(66)
68
INTERNAL WORKING
VIEW
OFF
(66)
(62)
VIEW FOR WIRING
ICE
66
67
62
CLEAN
69
(49)
COMPRESSOR
(47)
R
CONTACTOR
CONTACTS
TB35
*OVERLOAD
(42)
S
RUN CAPACITOR
(46)
R
R
(50)
TB30
C
(48)
(45)
L1
(51)
(52)
(85)
(86)
PTCR
(53)
TB33
TB34
FAN CYCLE CONTROL
TB30
RUN CAPACITOR**
FAN MOTOR
(AIR COOLED ONLY)
SV1646-2
Figure 6-2. Self-Contained — Refrigeration System Start-Up
Table 6-2. Self-Contained Models
2. Refrigeration System Start Up (5 Seconds)
Toggle Switch
Bin Switch
Control Board Relays
#1
Water Pump
#2
Water Fill Valve
#3
Harvest Solenoid
#4
Water Dump Valve
#5
Contactor Coil
Compressor
Condenser Fan Motor
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-Out
Main Fuse (On Control Board)
6-4
ICE
Closed
Open / OFF
Closed / ON
Closed / ON
Open / OFF
Closed / ON
ON
ON
Closed
Closed
Part No. 80-1100-3
Section 6
Electrical System
Freeze Sequence
SEE SERIAL PLATE FOR VOLTAGE
3. PRE-CHILL
To pre-chill the evaporator, the
compressor runs for 30 seconds prior
to water flow.
L2 (N)
L1
(61)
WATER
VALVE
(60)
HIGH PRES
CUTOUT
(77)
2
(80)
HARVEST
SOLENOID
4
The water fill valve remains on until
the water level sensor closes for
three continuous seconds.
(22)
(21)
(20)
(55)
TB32
TB35
1
(76)
3
(57)
(58)
(59)
TERMINATES AT
PIN CONNECTION
(73)
ICE THICKNESS PROBE
1C
NOT USED
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
WATER LEVEL
(62)
BIN SWITCH LIGHT
(63)
(64)
BIN SWITCH
TB30
TB30
1F
1G
(74)
CONTACTOR
COIL
(56)
WATER LEVEL PROBE
TB30
WATER
PUMP
TB37
TB30
(99)
(98)
TB31
TRANS.
FUSE (7A)
(75)
(81)
DUMP
SOLENOID
5
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
TOGGLE SWITCH
(68)
(69)
(67)
(66)
68
INTERNAL WORKING
VIEW
OFF
(66)
(62)
VIEW FOR WIRING
ICE
66
67
62
CLEAN
69
(49)
COMPRESSOR
(47)
R
CONTACTOR
CONTACTS
TB35
*OVERLOAD
(42)
S
RUN CAPACITOR
(46)
R
R
(50)
C
(48)
TB30
(45)
L1
(51)
(52)
(85)
(86)
PTCR
(53)
TB34
TB33
FAN CYCLE CONTROL
TB30
RUN CAPACITOR**
FAN MOTOR
(AIR COOLED ONLY)
SV1646-3
Figure 6-3. Self-Contained — Pre-Chill
Table 6-3. Self-Contained Models
3. Pre-Chill (30 Seconds)
Toggle Switch
Bin Switch
Control Board Relays
#1
Water Pump
#2
Water Fill Valve
#3
Harvest Solenoid
#4
Water Dump Valve
#5
Contactor Coil
Compressor
Condenser Fan Motor
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-Out
Main Fuse (On Control Board)
Part No. 80-1100-3
ICE
Closed
Open / OFF
Closed / ON
Open / OFF
Open / OFF
Closed / ON
ON
ON
Closed
Closed
6-5
Electrical System
Section 6
4. FREEZE
SEE SERIAL PLATE FOR VOLTAGE
L2 (N)
L1
The water pump starts after the 30second pre-chill. An even flow of
water is directed across the
evaporator and into each cube cell,
where it freezes.
(20)
(61)
WATER
VALVE
(60)
HIGH PRES
CUTOUT
(77)
2
1
(76)
3
After six minutes the water inlet valve
is locked out and can not add
additional water.
(57)
(59)
TERMINATES AT
PIN CONNECTION
(73)
ICE THICKNESS PROBE
1C
NOT USED
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
WATER LEVEL
(62)
BIN SWITCH LIGHT
(63)
(64)
BIN SWITCH
TB30
TB30
1F
1G
(74)
CONTACTOR
COIL
(56)
WATER LEVEL PROBE
TB30
WATER
PUMP
(58)
TB37
TB30
(99)
(98)
TB31
TRANS.
FUSE (7A)
(75)
(81)
DUMP
SOLENOID
5
NOTE: The ice machine cannot
initiate a harvest cycle until a 6minute freeze lock has expired.
(80)
HARVEST
SOLENOID
4
When sufficient ice has formed, the
water flow (not the ice) contacts the
ice thickness probes. After
approximately 7 seconds of continual
contact, a harvest cycle is initiated.
(22)
(21)
(55)
TB32
TB35
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
TOGGLE SWITCH
(68)
(69)
(67)
(66)
68
INTERNAL WORKING
VIEW
OFF
(66)
(62)
VIEW FOR WIRING
ICE
66
67
62
CLEAN
69
(49)
COMPRESSOR
(47)
R
CONTACTOR
CONTACTS
TB35
*OVERLOAD
(42)
S
RUN CAPACITOR
(46)
R
R
(50)
C
(48)
TB30
(45)
L1
(51)
(52)
(85)
(86)
TB33
PTCR
(53)
TB34
FAN CYCLE CONTROL
TB30
RUN CAPACITOR**
FAN MOTOR
(AIR COOLED ONLY)
SV1646-4
Figure 6-4.
Self-Contained — Freeze
Table 6-4. Self-Contained Models
4. Freeze (Until 7 Seconds of Water Contact with Ice Thickness Probe)
Toggle Switch
Bin Switch
Control Board Relays
#1
Water Pump
#2
Water Fill Valve
#3
Harvest Solenoid
#4
Water Dump Valve
#5
Contactor Coil
Compressor
Condenser Fan Motor
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-Out
Main Fuse (On Control Board)
6-6
ICE
Closed
Closed / ON
Cycles ON then OFF
Open / OFF
Open / OFF
Closed / ON
ON
ON
Closed
Closed
Part No. 80-1100-3
Section 6
Electrical System
Harvest Sequence
SEE SERIAL PLATE FOR VOLTAGE
L2 (N)
L1
5. WATER PURGE
The water pump continues to run,
and the water dump valve energizes
for 45 seconds to purge the water in
the sump trough. The water fill valve
energizes (turns on) and deenergizes (turns off) strictly by time.
The water fill valve energizes for the
last 15 seconds of the 45-second
water purge. The water purge must
be at the factory setting of 45
seconds for the fill valve to energize
during the last 15 seconds of the
Water Purge. If set at less than 45
seconds, the water fill valve does not
energize during the water purge.
(20)
(61)
WATER
VALVE
(60)
HIGH PRES
CUTOUT
(77)
2
1
(76)
3
(57)
(59)
TERMINATES AT
PIN CONNECTION
(73)
ICE THICKNESS PROBE
1C
NOT USED
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
WATER LEVEL
(62)
BIN SWITCH LIGHT
(63)
BIN SWITCH
TB30
TB30
1F
1G
(74)
CONTACTOR
COIL
(56)
WATER LEVEL PROBE
TB30
WATER
PUMP
(58)
TB37
TB30
(99)
(98)
TB31
TRANS.
FUSE (7A)
(75)
(81)
DUMP
SOLENOID
5
(64)
(80)
HARVEST
SOLENOID
4
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
TOGGLE SWITCH
(68)
(69)
(67)
After the 45 second water purge, the
water fill valve, water pump and
dump valve de-energize. (Refer to
“Water Purge Adjustment” on Page
3-3 for details.) The harvest valve
also opens at the beginning of the
water purge to divert hot refrigerant
gas into the evaporator.
(22)
(21)
(55)
TB32
TB35
(66)
68
INTERNAL WORKING
VIEW
OFF
(66)
(62)
VIEW FOR WIRING
ICE
66
67
62
CLEAN
69
(49)
COMPRESSOR
(47)
R
CONTACTOR
CONTACTS
TB35
*OVERLOAD
(42)
S
RUN CAPACITOR
(46)
R
R
(50)
C
(48)
TB30
(45)
L1
(51)
(52)
(85)
(86)
TB33
PTCR
(53)
TB34
FAN CYCLE CONTROL
TB30
RUN CAPACITOR**
FAN MOTOR
(AIR COOLED ONLY)
SV1646-5
Figure 6-5.
Self-Contained — Water Purge
Table 6-5. Self-Contained Models
5. Water Purge (45 Seconds)
Toggle Switch
Bin Switch
Control Board Relays
#1
Water Pump
#2
Water Fill Valve
#3
Harvest Solenoid
#4
Water Dump Valve
#5
Contactor Coil
Compressor
Condenser Fan Motor
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-Out
Main Fuse (On Control Board)
Part No. 80-1100-3
ICE
Closed
Closed / ON
Cycles OFF then ON
Closed / ON
Closed / ON
Closed / ON
ON
ON
Closed
Closed
6-7
Electrical System
Section 6
6. HARVEST
SEE SERIAL PLATE FOR VOLTAGE
L2 (N)
L1
The harvest valve(s) remains open,
allowing refrigerant gas to warm the
evaporator. This causes the cubes to
slide, as a sheet, off the evaporator
and into the storage bin.
(20)
(55)
TB32
WATER
VALVE
(60)
HIGH PRES
CUTOUT
(77)
2
(80)
HARVEST
SOLENOID
4
1
(76)
3
The sliding sheet of cubes swings the
water curtain out, opening the bin
switch. This momentary opening and
closing of the bin switch terminates
the Harvest Cycle and returns the ice
machine to the Freeze Cycle (steps
3-4).
(22)
(21)
(61)
TB35
(57)
(59)
TERMINATES AT
PIN CONNECTION
(73)
ICE THICKNESS PROBE
1C
NOT USED
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
WATER LEVEL
(62)
BIN SWITCH LIGHT
(63)
(64)
BIN SWITCH
TB30
TB30
1F
1G
(74)
CONTACTOR
COIL
(56)
WATER LEVEL PROBE
TB30
WATER
PUMP
(58)
TB37
TB30
(99)
(98)
TB31
TRANS.
FUSE (7A)
(75)
(81)
DUMP
SOLENOID
5
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
TOGGLE SWITCH
(68)
(69)
(67)
(66)
68
INTERNAL WORKING
VIEW
OFF
(66)
(62)
VIEW FOR WIRING
ICE
66
67
62
CLEAN
69
(49)
COMPRESSOR
(47)
R
CONTACTOR
CONTACTS
TB35
*OVERLOAD
(42)
S
RUN CAPACITOR
(46)
R
R
(50)
C
(48)
TB30
(45)
L1
(51)
(52)
(85)
(86)
PTCR
(53)
TB34
TB33
FAN CYCLE CONTROL
TB30
RUN CAPACITOR**
FAN MOTOR
(AIR COOLED ONLY)
SV1646-6
Figure 6-6. Self-Contained — Harvest
Table 6-6. Self-Contained Models
6. Harvest (Until Bin Switch Activation)
Toggle Switch
Bin Switch
Control Board Relays
#1
Water Pump
#2
Water Fill Valve
#3
Harvest Solenoid
#4
Water Dump Valve
#5
Contactor Coil
Compressor
Condenser Fan Motor
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-Out
Main Fuse (On Control Board)
6-8
ICE
Closed
Open / OFF
Open / OFF
Closed / ON
Open / OFF
Closed / ON
ON
ON
Closed
Closed
Part No. 80-1100-3
Section 6
Electrical System
Automatic Shut-Off
7. AUTOMATIC SHUT-OFF
SEE SERIAL PLATE FOR VOLTAGE
L2 (N)
L1
If the storage bin is full at the end of a
harvest cycle, the sheet of cubes fails
to clear the water curtain and holds it
open. After the water curtain is held
open for 7 seconds, the ice machine
shuts off.
(61)
WATER
VALVE
(60)
HIGH PRES
CUTOUT
(77)
2
1
(76)
3
(57)
(58)
(59)
TERMINATES AT
PIN CONNECTION
(73)
ICE THICKNESS PROBE
1C
NOT USED
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
WATER LEVEL
(62)
BIN SWITCH LIGHT
(63)
(64)
BIN SWITCH
TB30
TB30
1F
1G
(74)
CONTACTOR
COIL
(56)
WATER LEVEL PROBE
TB30
WATER
PUMP
TB37
TB30
(99)
(98)
TB31
TRANS.
FUSE (7A)
(75)
(81)
DUMP
SOLENOID
5
NOTE: The ice machine must remain
off for 3 minutes before it can
automatically restart.
(80)
HARVEST
SOLENOID
4
The ice machine remains off until
enough ice is removed from the
storage bin to allow the sheet of
cubes to drop clear of the water
curtain. As the water curtain swings
back to the operating position, the bin
switch closes and the ice machine
restarts (steps 1-2).
(22)
(21)
(20)
(55)
TB32
TB35
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
TOGGLE SWITCH
(68)
(69)
(67)
(66)
68
INTERNAL WORKING
VIEW
OFF
(66)
(62)
VIEW FOR WIRING
ICE
66
67
62
CLEAN
69
(49)
COMPRESSOR
(47)
R
CONTACTOR
CONTACTS
TB35
*OVERLOAD
(42)
S
RUN CAPACITOR
(46)
R
R
(50)
C
(48)
TB30
(45)
L1
(51)
(52)
(85)
(86)
PTCR
(53)
TB33
TB34
FAN CYCLE CONTROL
TB30
RUN CAPACITOR**
FAN MOTOR
(AIR COOLED ONLY)
SV1646-7
Figure 6-7. Self-Contained — Automatic Shut-Off
Table 6-7. Self-Contained Models
7. Automatic Shut-Off (Until Bin Switch Closes)
Toggle Switch
Bin Switch
Control Board Relays
#1
Water Pump
#2
Water Fill Valve
#3
Harvest Solenoid
#4
Water Dump Valve
#5
Contactor Coil
Compressor
Condenser Fan Motor
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-Out
Main Fuse (On Control Board)
Part No. 80-1100-3
ICE
Open
Open / OFF
Open / OFF
Open / OFF
Open / OFF
Open / OFF
OFF
OFF
Closed
Closed
6-9
Electrical System
Section 6
REMOTE MODELS
SEE SERIAL PLATE FOR VOLTAGE
L2 (N)
L1
(21)
(20)
Initial Start-Up Or Start-Up After
Automatic Shut-Off
TB32
TB35
(55)
HPR
SOLENOID
(61)
(60)
1. WATER PURGE
HIGH PRES
CUTOUT
Before the compressor starts, the
water pump and water dump
solenoid are energized for 45
seconds to purge old water from the
ice machine. This ensures that the
ice-making cycle starts with fresh
water.
(78)
(77)
4
HARVEST
SOLENOID
(80)
(75)
(76)
3
DUMP
SOLENOID
5
(57)
TB31
TRANS.
FUSE (7A)
(99)
(59)
1C
(83)
(82)
LIQUID LINE
SOLENOID
WATER LEVEL PROBE
TB30
WATER LEVEL
(62)
BIN SWITCH LIGHT
(63)
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
TOGGLE SWITCH
(68)
(69)
(67)
(62)
VIEW FOR WIRING
ICE
OFF
(66)
(66)
TB30
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
1G
NOT USED
BIN SWITCH
(74)
CONTACTOR
COIL
(56)
1F
TB30
WATER
PUMP
(73)
ICE THICKNESS PROBE
TB30
(81)
(98)
(58)
TB37
(64)
(79)
2
1
NOTE: The harvest valve and
harvest pressure regulating (HPR)
solenoid valve are also energized
during the water purge. In the case of
an initial refrigeration start-up, they
stay on for an additional 5 seconds
(50 seconds total).
(22)
WATER
VALVE
INTERNAL WORKING
VIEW
68
66
67
62
CLEAN
69
(49)
COMPRESSOR
R
CONTACTOR
CONTACTS
TB35
*OVERLOAD
(47)
S
RUN CAPACITOR
(46)
(48)
(42)
R
R
(50)
TB30
C
(45)
L1
(51)
TB33
PTCR
(52)
TERMINATES AT
PIN CONNECTION
(53)
TB34
(F2)
(F1)
TB30
REMOTE
FAN MOTOR
REMOTE CONDENSER
SV1648-1
RUN CAPACITOR
Figure 6-8. Remote — Water Purge
Table 6-8. Remote Models
1. Water Purge (45 Seconds)
Toggle Switch
Bin Switch
Control Board Relays
#1
Water Pump
#2
Water Fill Valve
#3
Harvest Solenoid
Harvest Pressure Regulating (HPR) Solenoid
#4
Water Dump Valve
#5
Contactor Coil
Liquid Line Solenoid
Compressor
Condenser Fan Motor
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-Out
Main Fuse (On Control Board)
6-10
ICE
Closed
Closed / ON
Open / OFF
Closed / ON
Closed / ON
Closed / ON
Open / OFF
De-energized
OFF
OFF
Closed
Closed
Part No. 80-1100-3
Section 6
Electrical System
2. REFRIGERATION SYSTEM
START-UP
The compressor, remote condenser
fan motor and liquid line solenoid
valve energize after the 45-second
water purge, and remain on
throughout the Freeze and Harvest
cycles.
SEE SERIAL PLATE FOR VOLTAGE
L2 (N)
L1
(20)
TB32
TB35
(55)
(60)
(78)
(77)
4
HARVEST
SOLENOID
(80)
(75)
(76)
3
DUMP
SOLENOID
5
(57)
TB31
TRANS.
FUSE (7A)
(99)
(59)
1C
(83)
(82)
LIQUID LINE
SOLENOID
WATER LEVEL PROBE
WATER LEVEL
(62)
BIN SWITCH LIGHT
(63)
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
TOGGLE SWITCH
(68)
(69)
(67)
(66)
TB30
TB30
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
1G
NOT USED
BIN SWITCH
(74)
CONTACTOR
COIL
(56)
1F
TB30
WATER
PUMP
(73)
ICE THICKNESS PROBE
TB30
(81)
(98)
(58)
TB37
(64)
(79)
2
1
The harvest valve and harvest
pressure regulating (HPR) solenoid
valve remain on for the first 5
seconds of the initial compressor
start-up.
(22)
WATER
VALVE
HPR
SOLENOID
(61)
HIGH PRES
CUTOUT
The water fill valve is energized at
the same time as the compressor. It
remains on until the water level
sensor closes for 3 continuous
seconds.
VIEW FOR WIRING
ICE
OFF
(66)
(62)
NOTE: (The compressor and the
condenser fan motor are wired
through the contactor. Any time the
contactor coil is energized, these
components are supplied with
power.)
(21)
INTERNAL WORKING
VIEW
68
66
67
62
CLEAN
69
(49)
COMPRESSOR
R
CONTACTOR
CONTACTS
TB35
*OVERLOAD
(47)
S
RUN CAPACITOR
(46)
(48)
(42)
R
R
(50)
TB30
C
(45)
L1
(51)
TB33
PTCR
(52)
TERMINATES AT
PIN CONNECTION
(53)
TB34
(F2)
(F1)
TB30
REMOTE
FAN MOTOR
REMOTE CONDENSER
SV1648-2
RUN CAPACITOR
Figure 6-9. Remote — Refrigeration System Start-Up
Table 6-9. Remote Models
2. Refrigeration System Start-Up (5 Seconds)
Toggle Switch
Bin Switch
Control Board Relays
#1
Water Pump
#2
Water Fill Valve
#3
Harvest Solenoid
Harvest Pressure Regulating (HPR) Solenoid
#4
Water Dump Valve
#5
Contactor Coil
Liquid Line Solenoid
Compressor
Condenser Fan Motor
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-Out
Main Fuse (On Control Board)
Part No. 80-1100-3
ICE
Closed
Open / OFF
Closed / ON
Closed / ON
Closed / ON
Open / OFF
Closed / ON
Energized
ON
ON
Closed
Closed
6-11
Electrical System
Section 6
Freeze Sequence
SEE SERIAL PLATE FOR VOLTAGE
L2 (N)
L1
3. PRE-CHILL
To pre-chill the evaporator, the
compressor runs for 30 seconds prior
to water flow.
(21)
(20)
TB32
TB35
(55)
HPR
SOLENOID
(61)
(60)
HIGH PRES
CUTOUT
(78)
(77)
4
HARVEST
SOLENOID
(80)
(75)
(76)
3
DUMP
SOLENOID
5
(57)
TB31
TRANS.
FUSE (7A)
(99)
(59)
1C
(83)
(82)
LIQUID LINE
SOLENOID
WATER LEVEL PROBE
WATER LEVEL
(62)
BIN SWITCH LIGHT
(63)
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
TOGGLE SWITCH
(68)
(69)
(67)
(66)
TB30
TB30
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
1G
NOT USED
BIN SWITCH
(74)
CONTACTOR
COIL
(56)
1F
TB30
WATER
PUMP
(73)
ICE THICKNESS PROBE
TB30
(81)
(98)
(58)
TB37
(64)
(79)
2
1
NOTE: The water fill valve remains
on until the water level sensor closes
for three continuous seconds.
(22)
WATER
VALVE
OFF
(66)
(62)
VIEW FOR WIRING
ICE
INTERNAL WORKING
VIEW
68
66
67
62
CLEAN
69
(49)
COMPRESSOR
R
CONTACTOR
CONTACTS
TB35
*OVERLOAD
(47)
S
RUN CAPACITOR
(46)
(48)
(42)
R
R
(50)
TB30
C
(45)
L1
(51)
TB33
PTCR
(52)
TERMINATES AT
PIN CONNECTION
(53)
TB34
(F2)
(F1)
TB30
REMOTE
FAN MOTOR
REMOTE CONDENSER
SV1648-3
RUN CAPACITOR
Figure 6-10. Remote — Pre-Chill
Table 6-10. Remote Models
3. Pre-Chill (30 Seconds)
Toggle Switch
Bin Switch
Control Board Relays
#1
Water Pump
#2
Water Fill Valve
#3
Harvest Solenoid
Harvest Pressure Regulating (HPR) Solenoid
#4
Water Dump Valve
#5
Contactor Coil
Liquid Line Solenoid
Compressor
Condenser Fan Motor
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-Out
Main Fuse (On Control Board)
6-12
ICE
Closed
Open / OFF
Closed / ON
Open / OFF
Open / OFF
Open / OFF
Closed / ON
Energized
ON
ON
Closed
Closed
Part No. 80-1100-3
Section 6
Electrical System
4. FREEZE
SEE SERIAL PLATE FOR VOLTAGE
L2 (N)
L1
The water pump starts after the 30second pre-chill. An even flow of
water is directed across the
evaporator and into each cube cell,
where it freezes.
(20)
TB32
TB35
(55)
(21)
HPR
SOLENOID
(61)
(60)
HIGH PRES
CUTOUT
(78)
(77)
4
HARVEST
SOLENOID
(57)
TB31
TRANS.
FUSE (7A)
(99)
(59)
1C
(83)
(82)
LIQUID LINE
SOLENOID
WATER LEVEL PROBE
WATER LEVEL
(62)
BIN SWITCH LIGHT
(63)
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
TOGGLE SWITCH
(68)
(69)
(67)
(66)
TB30
TB30
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
1G
NOT USED
BIN SWITCH
(74)
CONTACTOR
COIL
(56)
1F
TB30
WATER
PUMP
(73)
ICE THICKNESS PROBE
TB30
(81)
(98)
(58)
TB37
(64)
(75)
DUMP
SOLENOID
5
NOTE: The ice machine cannot
initiate a harvest cycle until a 6minute freeze lock has expired.
(80)
(76)
3
When sufficient ice has formed, the
water flow (not the ice) contacts the
ice thickness probes. After
approximately 7 seconds of continual
contact, a harvest cycle is initiated.
(79)
2
1
After six minutes the water inlet valve
is locked out and can not add
additional water.
(22)
WATER
VALVE
OFF
(66)
(62)
VIEW FOR WIRING
ICE
INTERNAL WORKING
VIEW
68
66
67
62
CLEAN
69
(49)
COMPRESSOR
R
CONTACTOR
CONTACTS
TB35
*OVERLOAD
(47)
S
RUN CAPACITOR
(46)
(48)
(42)
R
R
(50)
TB30
C
(45)
L1
(51)
TB33
PTCR
(52)
TERMINATES AT
PIN CONNECTION
(53)
TB34
(F2)
(F1)
TB30
REMOTE
FAN MOTOR
REMOTE CONDENSER
SV1648-4
RUN CAPACITOR
Figure 6-11. Remote — Freeze
Table 6-11. Remote Models
4. Freeze (Until 7 Seconds of Water Contact with Ice Thickness Probe)
Toggle Switch
Bin Switch
Control Board Relays
#1
Water Pump
#2
Water Fill Valve
#3
Harvest Solenoid
Harvest Pressure Regulating (HPR) Solenoid
#4
Water Dump Valve
#5
Contactor Coil
Liquid Line Solenoid
Compressor
Condenser Fan Motor
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-Out
Main Fuse (On Control Board)
Part No. 80-1100-3
ICE
Closed
Closed / ON
Cycles / ON then OFF
Open / OFF
Open / OFF
Open / OFF
Closed / ON
Energized
ON
ON
Closed
Closed
6-13
Electrical System
Section 6
Harvest Sequence
SEE SERIAL PLATE FOR VOLTAGE
L2 (N)
L1
(20)
5. WATER PURGE
The water pump continues to run,
and the water dump valve energizes
for 45 seconds to purge the water in
the sump trough. The water fill valve
energizes (turns on) and deenergizes (turns off) strictly by time.
The water fill valve energizes for the
last 15 seconds of the 45-second
water purge. The water purge must
be at the factory setting of 45
seconds for the fill valve to energize
during the last 15 seconds of the
Water Purge. If set at less than 45
seconds the water fill valve does not
energize during the water purge.
TB32
TB35
(55)
(60)
HIGH PRES
CUTOUT
(78)
(79)
2
(77)
4
HARVEST
SOLENOID
1
(80)
(75)
(76)
3
DUMP
SOLENOID
5
(57)
TB31
TRANS.
FUSE (7A)
(99)
(59)
1C
(83)
(82)
LIQUID LINE
SOLENOID
WATER LEVEL PROBE
WATER LEVEL
(62)
BIN SWITCH LIGHT
(63)
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
TOGGLE SWITCH
(66)
TB30
TB30
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
1G
NOT USED
BIN SWITCH
(74)
CONTACTOR
COIL
(56)
1F
TB30
WATER
PUMP
(73)
ICE THICKNESS PROBE
TB30
(81)
(98)
(58)
TB37
(64)
(22)
WATER
VALVE
HPR
SOLENOID
(61)
(68)
(69)
(67)
NOTE: After the 45 second water
purge, the water fill valve, water
pump and dump valve de-energize.
(Refer to “Water Purge Adjustment”
on Page 3-3 for details.) The harvest
valve and HPR solenoid also open at
the beginning of the water purge to
divert hot refrigerant gas into the
evaporator.
(21)
OFF
(66)
(62)
VIEW FOR WIRING
ICE
INTERNAL WORKING
VIEW
68
66
67
62
CLEAN
69
(49)
COMPRESSOR
R
CONTACTOR
CONTACTS
TB35
*OVERLOAD
(47)
S
RUN CAPACITOR
(46)
(48)
(42)
R
R
(50)
TB30
C
(45)
L1
(51)
TB33
PTCR
(52)
TERMINATES AT
PIN CONNECTION
(53)
TB34
(F2)
(F1)
TB30
REMOTE
FAN MOTOR
REMOTE CONDENSER
SV1648-5
RUN CAPACITOR
Figure 6-12. Remote — Water Purge
Table 6-12. Remote Models
5. Water Purge (45 Seconds)
Toggle Switch
Bin Switch
Control Board Relays
#1
Water Pump
#2
Water Fill Valve
#3
Harvest Solenoid
Harvest Pressure Regulating (HPR) Solenoid
#4
Water Dump Valve
#5
Contactor Coil
Liquid Line Solenoid
Compressor
Condenser Fan Motor
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-Out
Main Fuse (On Control Board)
6-14
ICE
Closed
Closed / ON
Cycles / OFF then ON
Closed / ON
Closed / ON
Closed / ON
Closed / ON
Energized
ON
ON
Closed
Closed
Part No. 80-1100-3
Section 6
Electrical System
6. HARVEST
SEE SERIAL PLATE FOR VOLTAGE
L2 (N)
L1
The harvest valve(s) and HPR
solenoid valve remain open, allowing
refrigerant gas to warm the
evaporator. This causes the cubes to
slide, as a sheet, off the evaporator
and into the storage bin.
(21)
(20)
TB32
TB35
(55)
HPR
SOLENOID
(61)
(60)
HIGH PRES
CUTOUT
(77)
4
HARVEST
SOLENOID
(80)
(75)
(76)
3
DUMP
SOLENOID
5
(57)
TB31
TRANS.
FUSE (7A)
(99)
(59)
1C
(83)
(82)
LIQUID LINE
SOLENOID
WATER LEVEL PROBE
WATER LEVEL
(62)
BIN SWITCH LIGHT
(63)
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
TOGGLE SWITCH
(68)
(69)
(67)
(66)
TB30
TB30
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
1G
NOT USED
BIN SWITCH
(74)
CONTACTOR
COIL
(56)
1F
TB30
WATER
PUMP
(73)
ICE THICKNESS PROBE
TB30
(81)
(98)
(58)
TB37
(64)
(79)
(78)
2
1
The sliding sheet of cubes swings the
water curtain out, opening the bin
switch. This momentary opening and
closing of the bin switch terminates
the Harvest Cycle and returns the ice
machine to the Freeze Cycle (steps
3-4).
(22)
WATER
VALVE
OFF
(66)
(62)
VIEW FOR WIRING
ICE
INTERNAL WORKING
VIEW
68
66
67
62
CLEAN
69
(49)
COMPRESSOR
R
CONTACTOR
CONTACTS
TB35
*OVERLOAD
(47)
S
RUN CAPACITOR
(46)
(48)
(42)
R
R
(50)
TB30
C
(45)
L1
(51)
TB33
PTCR
(52)
TERMINATES AT
PIN CONNECTION
(53)
TB34
(F2)
(F1)
TB30
REMOTE
FAN MOTOR
REMOTE CONDENSER
SV1648-6
RUN CAPACITOR
Figure 6-13. Remote — Harvest
Table 6-13. Remote Models
6. Harvest (Until Bin Switch Activation)
Toggle Switch
Bin Switch
Control Board Relays
#1
Water Pump
#2
Water Fill Valve
#3
Harvest Solenoid
Harvest Pressure Regulating (HPR) Solenoid
#4
Water Dump Valve
#5
Contactor Coil
Liquid Line Solenoid
Compressor
Condenser Fan Motor
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-Out
Main Fuse (On Control Board)
Part No. 80-1100-3
ICE
Closed
Open / OFF
Open / OFF
Closed / ON
Closed / ON
Open / OFF
Closed / ON
Energized
ON
ON
Closed
Closed
6-15
Electrical System
Section 6
Automatic Shut-Off
SEE SERIAL PLATE FOR VOLTAGE
L2 (N)
L1
7. AUTOMATIC SHUT-OFF
If the storage bin is full at the end of a
harvest cycle, the sheet of cubes fails
to clear the water curtain and holds it
open. After the water curtain is held
open for 7 seconds, the ice machine
shuts off.
(21)
(20)
TB32
TB35
(55)
HPR
SOLENOID
(61)
(60)
HIGH PRES
CUTOUT
(78)
(77)
4
HARVEST
SOLENOID
(75)
DUMP
SOLENOID
5
(57)
TB31
TRANS.
FUSE (7A)
(99)
(59)
1C
(83)
(82)
LIQUID LINE
SOLENOID
WATER LEVEL PROBE
WATER LEVEL
(62)
BIN SWITCH LIGHT
(63)
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
TOGGLE SWITCH
(68)
(69)
(67)
(66)
TB30
TB30
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
1G
NOT USED
BIN SWITCH
(74)
CONTACTOR
COIL
(56)
1F
TB30
WATER
PUMP
(73)
ICE THICKNESS PROBE
TB30
(81)
(98)
(58)
TB37
NOTE: The ice machine must remain
off for 3 minutes before it can
automatically restart.
(80)
(76)
3
(64)
(79)
2
1
The ice machine remains off until
enough ice is removed from the
storage bin to allow the sheet of
cubes to drop clear of the water
curtain. As the water curtain swings
back to the operating position, the bin
switch closes and the ice machine
restarts.
(22)
WATER
VALVE
OFF
(66)
(62)
VIEW FOR WIRING
ICE
INTERNAL WORKING
VIEW
68
66
67
62
CLEAN
69
(49)
COMPRESSOR
R
CONTACTOR
CONTACTS
TB35
*OVERLOAD
(47)
S
RUN CAPACITOR
(46)
(48)
(42)
R
R
(50)
TB30
C
(45)
L1
(51)
TB33
PTCR
(52)
TERMINATES AT
PIN CONNECTION
(53)
TB34
(F2)
(F1)
TB30
REMOTE
FAN MOTOR
REMOTE CONDENSER
SV1648-7
RUN CAPACITOR
Figure 6-14. Remote — Automatic Shut-Off
Table 6-14. Remote Models
7. Automatic Shut-Off (Until Bin Switch Closes)
Toggle Switch
Bin Switch
Control Board Relays
#1
Water Pump
#2
Water Fill Valve
#3
Harvest Solenoid
Harvest Pressure Regulating (HPR) Solenoid
#4
Water Dump Valve
#5
Contactor Coil
Liquid Line Solenoid
Compressor
Condenser Fan Motor
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-Out
Main Fuse (On Control Board)
6-16
ICE
Open
Open / OFF
Open / OFF
Open / OFF
Open / OFF
Open / OFF
Open / OFF
De-energized
ON
ON
Closed
Closed
Part No. 80-1100-3
Section 6
Electrical System
Wiring Diagrams
The following pages contain electrical wiring diagrams. Be sure you are referring to the correct diagram for the ice
machine which you are servicing.
! Warning
Always disconnect power before working on
electrical circuitry.
WIRING DIAGRAM LEGEND
The following symbols are used on all of the wiring diagrams:
*
Internal Compressor Overload
(Some models have external compressor overloads)
**
Fan Motor Run Capacitor
(Some models do not incorporate fan motor run capacitor)
TB
Terminal Board Connection
(Terminal board numbers are printed on the actual terminal board)
( )
Wire Number Designation
(The number is marked at each end of the wire)
—>>—
Multi-Pin Connection
(Electrical Box Side) —>>— (Compressor Compartment Side)
Part No. 80-1100-3
6-17
Electrical System
Section 6
Q200/Q280/Q320 - SELF CONTAINED - 1 PHASE WITH TERMINAL BOARD
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
L1
SEE SERIAL PLATE FOR VOLTAGE
(21)
(20)
(61)
WATER
VALVE
(60)
(55)
TB32
2
TB35
(77)
(80)
HARVEST
SOLENOID
4
1
HIGH PRES
CUTOUT
(76)
3
5
(75)
(81)
DUMP
SOLENOID
(57)
TB31
(99)
(98)
TRANS.
(58)
TB37
(59)
TERMINATES AT
PIN CONNECTION
(73)
1C
WATER LEVEL PROBE
TB30
TB30
WATER
PUMP
FUSE (7A)
ICE THICKNESS PROBE
L2 (N)
(22)
(56)
1F
(74)
TB30
CONTACTOR
COIL
TB30
CLEAN LIGHT
NOT USED
1G
LOW D.C.
VOLTAGE
PLUG
WATER LEVEL LIGHT
BIN SWITCH LIGHT
(62)
(63)
(64)
BIN SWITCH
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
TOGGLE SWITCH
(68)
(67)
(69)
OFF
(66)
(66)
VIEW FOR WIRING
ICE
(62)
68
INTERNAL WORKING
VIEW
66
67
62
CLEAN
69
(49)
TB30
COMPRESSOR
(47)
R
CONTACTOR
CONTACTS
TB35
*OVERLOAD
S
(50)
TB30
C
PTCR
(48)
(42)
L1
(51)
TB33
(52)
(85)
(86)
FAN CYCLE CONTROL
(53)
TB34
FAN MOTOR
(AIR COOLED ONLY)
TB30
RUN CAPACITOR**
SV1654
6-18
Part No. 80-1100-3
Section 6
Electrical System
Q280/Q370 - SELF CONTAINED - 1 PHASE WITHOUT TERMINAL BOARD
L2 (N)
SEE SERIAL PLATE FOR VOLTAGE
(20)
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
L1
(21)
(22)
WATER
VALVE
(61)
(60)
(89)
(55)
(77)
2
HIGH PRES
CUTOUT
3
(76)
1
(88)
(80)
HARVEST
SOLENOID
4
5
(75)
(81)
DUMP
SOLENOID
FUSE (7A)
(99)
(98)
(57)
TRANS.
WATER
PUMP
(58)
(59)
TERMINATES AT
PIN CONNECTION
ICE THICKNESS PROBE
1C
WATER LEVEL PROBE
1F
NOT USED
1G
CONTACTOR
COIL
(56)
CLEAN LIGHT
(42)
LOW D.C.
VOLTAGE
PLUG
BIN SWITCH LIGHT
(62)
(63)
(64)
BIN SWITCH
(74)
WATER LEVEL
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
(68)
(67)
ICE
66
(69)
OFF
(66)
(66)
VIEW FOR
WIRING
62
69
CLEAN
(62)
68
67
COMPRESSOR
R
CONTACTOR
CONTACTS
OVERLOAD INTERNAL
{230V 50/60 HZ}
S
C
(47)
S
R
(49)
L1
C
(48)
5
2
4
1
(46)
(51)
POTENTIAL
RELAY
(44)
START
CAPACITOR
COMPRESSOR
TERMINAL LAYOUT
VIEWED FROM END
OF COMPRESSOR
(45)
(50)
(85)
(86)
FAN MOTOR
(AIR COOLED ONLY)
FAN CYCLE CONTROL
RUN CAPACITOR**
SV3018
Part No. 80-1100-3
6-19
Electrical System
Section 6
Q320 - SELF CONTAINED - 1 PHASE WITHOUT TERMINAL BOARD
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
SEE SERIAL PLATE FOR VOLTAGE
DIAGRAM SHOWN DURING FREEZE CYCLE
L1
L2 (N)
(20)
WATER
VALVE
(61)
(55)
(89)
(60)
2
4
(77)
1
(88)
(80)
HARVEST
SOLENOID
3
HIGH PRES
CUTOUT
(22)
(21)
(75)
(76)
5
DUMP
SOLENOID
(57)
(99)
(98)
TRANS.
(81)
WATER
PUMP
TERMINATES AT
PIN CONNECTION
(59)
FUSE (7A)
ICE THICKNESS PROBE
(58)
1C
WATER LEVEL PROBE
(56)
1F
CLEAN LIGHT
1G
NOT USED
LOW D.C.
VOLTAGE
PLUG
(42)
(74)
WATER LEVEL
BIN SWITCH LIGHT
(62)
BIN SWITCH
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(63)
(64)
CONTACTOR
COIL
(65)
TOGGLE SWITCH
(68)
(69)
(67)
VIEW FOR WIRING
68
ICE
66
OFF
(66)
CLEAN
67
62
69
(62)
(49)
COMPRESSOR
(47)
S
R
C
CONTACTOR
CONTACTS
(50)
*OVERLOAD
PTCR
(48)
L1
FAN MOTOR
(AIR COOLED ONLY)
(51)
(85)
(86)
FAN CYCLE CONTROL
RUN CAPACITOR**
COMPRESSOR
(49)
(47)
RUN CAPACITOR
R
R
OVERLOAD
(50)
(46)
(48)
(45)
PTCR
SV2070
6-20
Part No. 80-1100-3
Section 6
Electrical System
Q420/Q450/Q600/Q800/Q1000 - SELF CONTAINED 1 PHASE WITH TERMINAL BOARD
CAUTION: DISCONNECT POWER BEFORE WORKING
SEE SERIAL PLATE FOR VOLTAGE
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
L1
L2 (N)
(61)
TB35
WATER
VALVE
(60)
HIGH PRES
CUTOUT
(22)
(21)
(20)
(55)
TB32
(77)
2
(80)
HARVEST
SOLENOID
4
1
(76)
3
(57)
FUSE (7A)
TB30
WATER
PUMP
(58)
TB37
(59)
TERMINATES AT
PIN CONNECTION
(73)
ICE THICKNESS PROBE
CONTACTOR
COIL
(56)
NOT USED
(64)
TB30
1F
1G
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
WATER LEVEL LIGHT
(62)
BIN SWITCH LIGHT
(63)
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
BIN SWITCH
(65)
(67)
(66)
(74)
TB30
1C
WATER LEVEL PROBE
TB30
(99)
(98)
TB31
TRANS.
(75)
(81)
DUMP
SOLENOID
5
TOGGLE SWITCH
(68)
ICE
VIEW FOR WIRING
68
(69)
INTERNAL WORKING
VIEW
OFF
(66)
(62)
66
67
62
CLEAN
69
(49)
COMPRESSOR
(47)
R
CONTACTOR
CONTACTS
TB35
(42)
*OVERLOAD
RUN CAPACITOR
R
R
S
(46)
(50)
TB30
C
(45)
(48)
L1
(51)
PTCR
(52)
(85)
(86)
TB33
(53)
TB34
FAN CYCLE CONTROL
TB30
RUN CAPACITOR**
FAN MOTOR
(AIR COOLED ONLY)
SV1646
Part No. 80-1100-3
6-21
Electrical System
Section 6
Q420/Q450/Q600/Q800/Q1000 - SELF CONTAINED 1 PHASE WITHOUT TERMINAL BOARD
CAUTION: DISCONNECT POWER BEFORE WORKING
L1
L2 (N)
ON ELECTRICAL CIRCUITRY.
SEE SERIAL PLATE FOR VOLTAGE
DIAGRAM SHOWN DURING FREEZE CYCLE
(20)
(61)
(55)
(89)
HIGH PRES
CUTOUT
2
(77)
4
(88)
(22)
(21)
WATER
VALVE
HARVEST
SOLENOID
(60)
3
1
(80)
(76)
(75)
DUMP
SOLENOID
5
(57)
TRANS.
(98)
(81)
(99)
WATER
PUMP
FUSE (7A)
(59)
TERMINATES AT
PIN CONNECTION
(58)
ICE THICKNESS PROBE
1C
CONTACTOR
COIL
(56)
1F
WATER LEVEL PROBE
LOW D.C.
VOLTAGE
PLUG
1G
NOT USED
(74)
CLEAN LIGHT
WATER LEVEL
(62)
BIN SWITCH
(64)
BIN SWITCH LIGHT
(63)
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
TOGGLE SWITCH
(68)
(69)
(67)
(66)
VIEW FOR WIRING
ICE
68
OFF
66
CLEAN
67
62
(62)
69
(49)
COMPRESSOR
(50)
S
R
(42)
(50)
(47)
CONTACTOR
CONTACTS
*Overload
C
(48)
L1
(45)
(46)
PTCR
(51)
(85)
(86)
FAN MOTOR
(AIR COOLED ONLY)
FAN CYCLE CONTROL
RUN CAPACITOR**
6-22
SV2071
Part No. 80-1100-3
Section 6
Electrical System
Q800/Q1000 - SELF CONTAINED - 3 PHASE WITH TERMINAL BOARD
SEE SERIAL PLATE FOR VOLTAGE
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
L1
L2
L3
DIAGRAM SHOWN DURING FREEZE CYCLE
TB35
WATER
VALVE
(61)
(60)
HIGH PRES
CUTOUT
(77)
2
HARVEST
SOLENOID
4
1
(55)
(76)
5
DUMP
SOLENOID
(57)
TB31
FUSE (7A)
(80)
(75)
3
TRANS.
TB30
(81)
(99)
(98)
TB30
WATER
PUMP
(58)
TB37
(59)
ICE THICKNESS PROBE
TERMINATES AT
PIN CONNECTION
(73)
(74)
TB30
1C
(56)
CONTACTOR
COIL
TB30
1F
WATER LEVEL PROBE
1G
NOT USED
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
WATER LEVEL LIGHT
(62)
BIN SWITCH LIGHT
(63)
(64)
(22)
(21)
(20)
TB32
BIN SWITCH
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
(67)
(66)
TOGGLE SWITCH
(68)
ICE
(69)
OFF
(66)
(62)
VIEW FOR WIRING
68
INTERNAL WORKING
VIEW
66
62
CLEAN
67
69
(96)
TB30
(42)
TB35
L3
L2
L1
TB33
(52)
(85)
(86)
(53)
TB34
FAN MOTOR
(AIR COOLED ONLY)
TB30
FAN CYCLE CONTROL
T2
COMPRESSOR
RUN CAPACITOR**
T3 T1
SV1647a
Part No. 80-1100-3
6-23
Electrical System
Section 6
Q800/Q1000 - SELF CONTAINED - 3 PHASE WITHOUT TERMINAL BOARD
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
SEE SERIAL PLATE FOR VOLTAGE
L3
L2
L1
(20)
(89)
(61)
HIGH PRES
CUTOUT
(60)
2
(88)
(77)
HARVEST
SOLENOID
4
3
(76)
5
DUMP
SOLENOID
(57)
FUSE (7A)
(59)
CONTACTOR
COIL
(56)
1F
NOT USED
WATER LEVEL
(62)
BIN SWITCH LIGHT
(63)
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
(67)
TOGGLE SWITCH
(68) ICE
(66)
OFF
VIEW FOR WIRING
68
66
(69)
62
(62) CLEAN
L2
(74)
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
1G
L3
TERMINATES AT
PIN CONNECTION
(58)
1C
(64)
(99)
WATER
PUMP
ICE THICKNESS PROBE
(75)
(81)
(98)
TRANS.
BIN SWITCH
(80)
1
(42)
WATER LEVEL PROBE
(22)
(21)
WATER
VALVE
(55)
67
69
L1
FAN MOTOR
(AIR COOLED ONLY)
CONTACTOR
CONTACTS
(51)
T2
(85)
(86)
FAN CYCLE CONTROL
RUN CAPACITOR**
T3
T1
SV2072
6-24
Part No. 80-1100-3
Section 6
Electrical System
Q1300/Q1800 - SELF CONTAINED - 1 PHASE WITH TERMINAL BOARD
SEE SERIAL PLATE FOR VOLTAGE
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
L1
L2(N)
WATER
VALVE
(21)
(20)
(22)
(55)
TB32
RH HARVEST
SOLENOID
TB35
(61)
(88)
HIGH PRES
CUTOUT
(87)
(60)
(77)
2
4
LH HARVEST
SOLENOID
1
(75)
(76)
3
(57)
(98)
TB31
TRANS.
TB30
(81)
DUMP
SOLENOID
5
(99)
TB30
WATER
PUMP
FUSE (7A)
(58)
TB37
ICE THICKNESS PROBE
(80)
1C
(59)
TERMINATES AT
PIN CONNECTION
(73)
(74)
TB30
1F
CONTACTOR
COIL
(56)
WATER LEVEL PROBE
TB30
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
1G
AUCS DISPENSE TIME
WATER LEVEL LIGHT
(62)
BIN SWITCH LIGHT
(63)
(64)
BIN SWITCH
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
TOGGLE SWITCH
(68)
(67)
(66)
VIEW FOR WIRING
ICE
68
(69)
INTERNAL WORKING
VIEW
OFF
(66)
(62)
66
67
62
CLEAN
69
CRANKCASE HEATER
(94)
(95)
TB35
TB30
(49)
COMPRESSOR
(47)
R
CONTACTOR
CONTACTS
*OVERLOAD
RUN CAPACITOR
R
(46)
R
(50)
CONTACTOR
CONTACTS
C
(48)
(42)
TB35
S
(45)
(96)
L2
L1
(51)
PTCR
(52)
(85)
(86)
(53)
TB30
(44)
TB34
TB33
FAN CYCLE CONTROL
RUN CAPACITOR**
FAN MOTOR
(AIR COOLED ONLY)
SV1652
Part No. 80-1100-3
6-25
Electrical System
Section 6
Q1300/Q1600/Q1800 - SELF CONTAINED - 1 PHASE WITHOUT TERMINAL BOARD
CAUTION: DISCONNECT POWER BEFORE WORKING
SEE SERIAL PLATE FOR VOLTAGE
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
L1
L2 (N)
(20)
WATER
VALVE
(55)
(89)
(22)
(21)
(61)
HIGH PRES
CUTOUT
(60)
(77)
2
(88)
(80)
HARVEST
SOLENOID
4
3
1
5
(75)
(76)
DUMP
SOLENOID
(81)
(98)
(99)
(42)
(57)
TRANS.
WATER
PUMP
FUSE (7A)
(59)
1C
ICE THICKNESS PROBE
(58)
CONTACTOR
COIL
1F
(56)
WATER LEVEL PROBE
AUCS DISPENSE TIME
BIN SWITCH
(64)
CLEAN LIGHT
1G LOW D.C.
VOLTAGE
PLUG
(74)
WATER LEVEL LIGHT
(62)
BIN SWITCH LIGHT
(63)
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
TOGGLE SWITCH
(68)
(67)
(69)
(66)
(62)
VIEW FOR WIRING
68
ICE
OFF
66
CLEAN
62
67
69
CRANKCASE HEATER
(95)
(94)
COMPRESSOR
(49)
S
(47)
R
*OVERLOAD
TERMINATES AT
PIN CONNECTION
RUN CAPACITOR
(50)
(46)
C
(48)
(96)
(45)
L1
L2
CONTACTOR
CONTACTS
CONTACTOR
CONTACTS
PTCR
(51)
(85)
(86)
FAN MOTOR
(AIR COOLED ONLY)
FAN CYCLE CONTROL
RUN CAPACITOR**
SV2075
6-26
Part No. 80-1100-3
Section 6
Electrical System
Q1300/Q1800 - SELF CONTAINED - 3 PHASE WITH TERMINAL BOARD
SEE SERIAL PLATE FOR VOLTAGE
L2 L1
L3
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
(20)
WATER
VALVE
(21)
(22)
TB32
TB35
RH HARVEST
SOLENOID
(61)
HIGH PRES
CUTOUT
(88)
2
4
(76)
(57)
TB31
(58)
TB37
(59)
ICE THICKNESS PROBE
1F
(56)
WATER LEVEL PROBE
1G
AUCS DISPENSE TIME
TB30
TERMINATES AT
PIN CONNECTION
(74)
(73)
1C
TB30
TB30
(99)
WATER
PUMP
(98)
TRANS.
FUSE (7A)
(75)
(81)
DUMP
SOLENOID
5
TB30
CONTACTOR
COIL
TB30
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
WATER LEVEL LIGHT
(62)
BIN SWITCH LIGHT
(63)
BIN SWITCH
(80)
LH HARVEST
SOLENOID
3
(55)
N - 50HZ
ONLY
(77)
1
(64)
(87)
(60)
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
(67)
(66)
(66)
TOGGLE SWITCH
(68)
ICE
(69)
OFF
(62)
VIEW FOR WIRING
68
INTERNAL WORKING
VIEW
62
CLEAN
CRANKCASE HEATER
(95)
66
69
(94)
TB35
67
TB30
(96)
TB30
(42)
NOTE: WIRE (96) IS NOT USED ON 50HZ
TB35
L3
L2
L1
TB33
(52)
(85)
(86)
FAN CYCLE CONTROL
T2
COMPRESSOR
(53)
TB34
FAN MOTOR
(AIR COOLED ONLY)
RUN CAPACITOR**
TB30
SV1653
T3 T1
Part No. 80-1100-3
6-27
Electrical System
Section 6
Q1300/Q1600/Q1800 - SELF CONTAINED - 3 PHASE WITHOUT TERMINAL BOARD
SEE SERIAL PLATE FOR VOLTAGE
L3
L2 L1
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
(89)
(20)
(21)
WATER
VALVE
(55)
RH HARVEST
SOLENOID
(88)
(61)
(88)
(60)
HIGH PRES
CUTOUT
2
(77)
4
(42)
3
1
(76)
(57)
N - 50HZ
ONLY
(75)
DUMP
SOLENOID
TRANS.
(87)
(80)
LH HARVEST
SOLENOID
5
(22)
(98)
(81)
(99)
WATER
PUMP
FUSE (7A)
(59)
ICE THICKNESS PROBE
TERMINATES AT
PIN CONNECTION
(58)
1C
CONTACTOR
COIL
(56)
1F
WATER LEVEL PROBE
BIN SWITCH
(64)
CLEAN LIGHT
1G LOW D.C.
VOLTAGE
PLUG
AUCS DISPENSE TIME
WATER LEVEL LIGHT
(62)
BIN SWITCH LIGHT
(63)
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
TOGGLE SWITCH
(68)
ICE
(69)
OFF
(66)
(67)
(62)
CLEAN
VIEW FOR WIRING
68
66
62
(95)
67
69
(94)
CRANKCASE HEATER
NOTE: WIRE (96) IS NOT USED ON 50HZ
L3
L2
(96)
L1
CONTACTOR
CONTACTS
FAN MOTOR
(AIR COOLED ONLY)
(51)
(85)
(86)
FAN CYCLE CONTROL
T2
RUN CAPACITOR**
T3
T1
COMPRESSOR
SV3008
6-28
Part No. 80-1100-3
Section 6
Electrical System
Q450/Q600/Q800/Q1000 - REMOTE - 1 PHASE WITH TERMINAL BOARD
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
L1
SEE SERIAL PLATE FOR VOLTAGE
L2 (N)
(21)
(20)
(22)
WATER
VALVE
TB32
(55)
HPR
SOLENOID
(61)
TB35
(60)
HIGH PRES
CUTOUT
(78)
(79)
2
(77)
4
HARVEST
SOLENOID
(80)
1
(75)
(76)
3
5
(57)
TB31
FUSE (7A)
(99)
(98)
TRANS.
(58)
(59)
(83)
(82)
LIQUID LINE
SOLENOID
(74)
(73)
1C
1G
(64)
TB30
1F
NOT USED
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
WATER LEVEL LIGHT
(62)
BIN SWITCH LIGHT
(63)
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
BIN SWITCH
(65)
TOGGLE SWITCH
(68)
(67)
VIEW FOR WIRING
ICE
(69)
OFF
(66)
(66)
TB30
CONTACTOR
COIL
(56)
WATER LEVEL PROBE
TB30
WATER
PUMP
TB37
ICE THICKNESS PROBE
TB30
(81)
DUMP
SOLENOID
(62)
68
INTERNAL WORKING
VIEW
66
67
62
CLEAN
69
(49)
COMPRESSOR
R
CONTACTOR
CONTACTS
TB35
*OVERLOAD
(47)
S
RUN CAPACITOR
(46)
(50)
TB30
C
(48)
(42)
R
R
(45)
L1
(51)
PTCR
(52)
TERMINATES AT
PIN CONNECTION
TB33
(53)
TB34
(F2)
(F1)
TB30
REMOTE
FAN MOTOR
REMOTE CONDENSER
RUN CAPACITOR
Part No. 80-1100-3
SV1648
6-29
Electrical System
Section 6
Q450/Q600/Q800/Q1000 - REMOTE - 1 PHASE WITHOUT TERMINAL BOARD
CAUTION: DISCONNECT POWER BEFORE WORKING
SEE SERIAL PLATE FOR VOLTAGE
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
L1
L2 (N)
(20)
(89)
(55)
(21)
(22)
WATER
VALVE
HPR
SOLENOID
(61)
(78)
HIGH PRES
CUTOUT
(79)
2
(88)
(60)
4
(88)
(80)
HARVEST
SOLENOID
1
3
(77)
DUMP
SOLENOID
5
(81)
(57)
(99)
TRANS.
(42)
(98)
WATER
PUMP
FUSE (7A)
(59)
(83)
(82)
LIQUID LINE
SOLENOID
(58)
1C
CONTACTOR
COIL
ICE THICKNESS PROBE
(56)
1F
CLEAN LIGHT
WATER LEVEL PROBE
LOW D.C.
VOLTAGE
PLUG
1G
AUCS DISPENSE TIME
(74)
WATER LEVEL LIGHT
BIN SWITCH LIGHT
(62)
BIN SWITCH
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(63)
(64)
(75)
(65)
TOGGLE SWITCH
(68)
(67)
(66)
(69)
VIEW FOR WIRING
ICE
68
OFF
66
(62) CLEAN
67
62
COMPRESSOR
(49)
R
(47)
69
(94)
RUN CAPACITOR
S
R
(46)
CONTACTOR
CONTACTS
*OVERLOAD
R
(50)
C
(48)
(45)
L1
PTCR
(51)
F1
F2
REMOTE
FAN MOTOR
REMOTE CONDENSER
RUN CAPACITOR**
6-30
SV2073
Part No. 80-1100-3
Section 6
Electrical System
Q800/Q1000 -REMOTE - 3 PHASE WITH TERMINAL BOARD
SEE SERIAL PLATE FOR VOLTAGE
L3 L2 L1
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
HPR
SOLENOID
(60)
HIGH PRES
CUTOUT
(78)
(79)
HARVEST
SOLENOID
(80)
(77)
2
4
1
DUMP
SOLENOID
5
(57)
TB31
TRANS.
FUSE (7A)
(98)
(81)
(99)
WATER
PUMP
(58)
TB37 (59)
TB30
TB30
(82)
(83)
LIQUID LINE
SOLENOID
ICE THICKNESS PROBE
(73)
1C
(56)
(74)
CONTACTOR
COIL
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
1G
AUCS DISPENSE TIME
WATER LEVEL LIGHT
(62)
BIN SWITCH LIGHT
(63)
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
BIN SWITCH
(65)
TB30
TB30
1F
WATER LEVEL PROBE
(64)
(75)
(76)
3
(55)
(22)
WATER
VALVE
(61)
TB32
TB35
(21)
(20)
TOGGLE SWITCH
(68)
ICE
(67)
(69)
OFF
(66)
(62)
VIEW FOR WIRING
INTERNAL WORKING
VIEW
68
66
62
CLEAN
67
69
(96)
TB30
(42)
TB35
L3
L2
(F1)
(F2)
L1
TB30
CONTACTOR
CONTACTS
TB33
T2
(52)
TERMINATES AT
PIN CONNECTION
(53)
TB34
REMOTE
FAN MOTOR
COMPRESSOR
T3 T1
REMOTE CONDENSER
SV1649
RUN CAPACITOR
Part No. 80-1100-3
6-31
Electrical System
Section 6
Q800/Q1000 -REMOTE - 3 PHASE WITHOUT TERMINAL BOARD
SEE SERIAL PLATE FOR VOLTAGE
L3 L2 L1
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
(21)
(22)
WATER
VALVE
(20)
(55)
(89)
(61)
(60)
HIGH PRES
CUTOUT
(88)
HPR
SOLENOID
(78)
2
(77)
4
HARVEST
SOLENOID
3
1
(42)
(98)
(57)
TRANS.
(59)
1F
(67)
(66)
TOGGLE SWITCH
(68) ICE
(69)
OFF
(62)
L3 L2
L1
CONTACTOR
CONTACTS
(56)
CONTACTOR
COIL
(74)
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(65)
(85)
(82)
BIN SWITCH LIGHT
(63)
(64)
(83)
(58)
WATER LEVEL LIGHT
(62)
BIN SWITCH
(99)
CLEAN LIGHT
1G LOW D.C.
VOLTAGE
PLUG
NOT USED
(75)
LIQUID LINE
SOLENOID
1C
WATER LEVEL PROBE
(81)
WATER
PUMP
FUSE (7A)
ICE THICKNESS PROBE
(80)
(76)
DUMP
SOLENOID
5
(79)
INTERNAL WORKING
VIEW
VIEW FOR WIRING
68
66
CLEAN
67
62
69
(F1)
(F2)
(51)
REMOTE
FAN MOTOR
T2
REMOTE CONDENSER
T3
T1
COMPRESSOR
RUN CAPACITOR
SV2074
6-32
Part No. 80-1100-3
Section 6
Electrical System
Q1300/Q1800 - REMOTE - 1 PHASE WITH TERMINAL BOARD
SEE SERIAL PLATE FOR VOLTAGE
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
WATER
VALVE
(21)
(20)
L2 (N)
(22)
HPR
SOLENOID
L1
RH HARVEST
SOLENOID
(55)
TB32
TB35
(61)
HIGH PRES
CUTOUT
(78)
(79)
(88)
(87)
(60)
(77)
2
4
LH HARVEST
SOLENOID
1
(80)
(75)
(76)
3
DUMP
SOLENOID
5
(57)
TB31
(98)
(99)
TRANS.
(58)
TB37
LIQUID LINE
SOLENOID
(74)
(73)
1C
1F
TB30
CONTACTOR
COIL
(56)
WATER LEVEL PROBE
(82)
(83)
(59)
ICE THICKNESS PROBE
TB30
1G
AUCS DISPENSE TIME
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
WATER LEVEL LIGHT
(62)
BIN SWITCH LIGHT
(63)
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
BIN SWITCH
(65)
VIEW FOR WIRING
TOGGLE SWITCH
(68)
(67)
(66)
ICE
68
(69)
INTERNAL WORKING
VIEW
OFF
(66)
66
CRANKCASE HEATER
(95)
67
62
CLEAN
(62)
TB35
TB30
WATER
PUMP
FUSE (7A)
(64)
TB30
(81)
69
(94)
TB30
(49)
COMPRESSOR
(47)
R
*OVERLOAD
CONTACTOR
CONTACTS
(42)
TB35
RUN CAPACITOR
S
R
R
(46)
(50)
CONTACTOR
CONTACTS
C
(48)
(45)
(96)
L1
L2
(51)
TB33
PTCR
(52)
TERMINATES AT
PIN CONNECTION
(53)
TB30
(44)
(F2)
TB34
(F1)
REMOTE
FAN MOTOR
REMOTE CONDENSER
RUN CAPACITOR
Part No. 80-1100-3
SV1650
6-33
Electrical System
Section 6
Q1300/Q1600/Q1800 - REMOTE - 1 Phase Without Terminal Board
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
SEE SERIAL PLATE FOR VOLTAGE
L2 (N)
(20)
(21)
(22)
WATER
VALVE
HPR
SOLENOID
L1
(89)
(78)
(79)
(88)
(87)
RH HARVEST
SOLENOID
(55)
(61)
HIGH PRES
CUTOUT
(77)
2
(80)
LH HARVEST
SOLENOID
(60)
4
(88)
1
(76)
3
(57)
TRANS.
(98)
(99)
WATER
PUMP
TB37
FUSE (7A)
(59)
1C
ICE THICKNESS PROBE
(82)
(83)
LIQUID LINE
SOLENOID
(58)
1F
CONTACTOR
COIL
(56)
WATER LEVEL PROBE
CLEAN LIGHT
1G LOW D.C.
VOLTAGE
PLUG
AUCS DISPENSE TIME
(75)
(81)
DUMP
SOLENOID
5
WATER LEVEL LIGHT
(74)
BIN SWITCH LIGHT
(62)
BIN SWITCH
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(63)
(64)
(65)
TOGGLE SWITCH
(68)
(67)
OFF
(66)
(62)
INTERNAL WORKING
VIEW
68
COMPRESSOR
67
66
CLEAN
62
CRANKCASE HEATER
(95)
(42)
VIEW FOR WIRING
ICE
(69)
69
(94)
(F2)
(49)
RUN CAPACITOR
R
S
(47)
(46)
*OVERLOAD
CONTACTOR
CONTACTS
R
R
(96)
(50)
CONTACTOR
CONTACTS
C
(48)
(45)
L1
L2
(44)
PTCR
(51)
(F1)
(F2)
REMOTE
FAN MOTOR
REMOTE CONDENSER
SV2076
RUN CAPACITOR
6-34
Part No. 80-1100-3
Section 6
Electrical System
Q1300/Q1800 - REMOTE - 3 PHASE WITH TERMINAL BOARD
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
WATER
VALVE
(21)
(22)
SEE SERIAL PLATE FOR VOLTAGE
(20)
L3
L2
N - 50HZ
ONLY
HPR
SOLENOID
L1
(78)
(79)
(88)
(87)
2
(77)
4
LH HARVEST
SOLENOID
(80)
RH HARVEST
SOLENOID
TB32
TB35
(61)
HIGH PRES
CUTOUT
(60)
1
(55)
3
(76)
5
DUMP
SOLENOID
(57)
TB31
TB30
TB30
WATER
PUMP
(58)
TB37
(59)
(82)
LIQUID LINE
SOLENOID
(74)
(83)
ICE THICKNESS PROBE
(73)
1C
1F
(56)
CONTACTOR
COIL
AUCS DISPENSE TIME
(64)
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
WATER LEVEL LIGHT
(62)
BIN SWITCH LIGHT
(63)
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
BIN SWITCH
(65)
(67)
(66)
(66)
TOGGLE SWITCH
(68)
ICE
(69)
OFF
(62)
VIEW FOR WIRING
68
INTERNAL WORKING
VIEW
66
67
62
CLEAN
CRANKCASE HEATER
(95)
TB35
TB30
TB30
WATER LEVEL PROBE
1G
TB30
(99)
(98)
TRANS.
FUSE (7A)
(75)
(81)
69
(94)
TB30
(96)
(42)
TB35
L3
L2
TB30
NOTE: WIRE (96) IS NOT USED ON 50HZ
(F1)
L1
CONTACTOR
CONTACTS
(51)
T2
(F2)
TB33
(52)
TERMINATES AT
PIN CONNECTION
(53)
TB34
REMOTE
FAN MOTOR
COMPRESSOR
T3 T1
REMOTE CONDENSER
RUN CAPACITOR
SV1651
Part No. 80-1100-3
6-35
Electrical System
Section 6
Q1300/Q1600/Q1800 - REMOTE - 3 PHASE WITHOUT TERMINAL BOARD
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
SEE SERIAL PLATE FOR VOLTAGE
L3
L2
DIAGRAM SHOWN DURING FREEZE CYCLE
(21)
(22)
WATER
VALVE
(20)
N - 50 HZ
ONLY
HPR
SOLENOID
L1
(79)
(78)
(89)
(55)
LH HARVEST
SOLENOID
(61)
(77)
2
4
(88)
(60)
RH HARVEST
SOLENOID
3
1
(76)
5
(42)
(57)
(59)
1F
(83)
LOW D.C.
VOLTAGE
PLUG
CONTACTOR
COIL
CLEAN LIGHT
WATER LEVEL LIGHT
(74)
(62)
BIN SWITCH LIGHT
(63)
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(64)
(65)
(82)
LIQUID LINE
SOLENOID
(56)
1G
BIN SWITCH
(75)
(99)
(58)
1C
NOT USED
(81)
(98)
WATER
PUMP
FUSE (7A)
WATER LEVEL PROBE
(80)
DUMP
SOLENOID
TRANS.
ICE THICKNESS PROBE
(87)
(88)
HIGH PRES
CUTOUT
TOGGLE SWITCH
(68)
(67)
(69)
VIEW FOR WIRING
ICE
OFF
(66)
(62)
INTERNAL WORKING
VIEW
67
62
CLEAN
(95)
68
66
69
(94)
NOTE: WIRE (96) IS NOT USED ON 50HZ
(96)
(96)
(F1)
L3
L2
L1
CONTACTOR
CONTACTS
(F2)
(51)
REMOTE
FAN MOTOR
T2
T3
T1
REMOTE CONDENSER
COMPRESSOR
RUN CAPACITOR
SV2077
6-36
Part No. 80-1100-3
Section 6
Electrical System
THIS PAGE INTENTIONALLY LEFT BLANK
Part No. 80-1100-3
6-37
Electrical System
Section 6
Component Specifications and Diagnostics
MAIN FUSE
BIN SWITCH
Function
Function
The control board fuse stops ice machine operation if
electrical components fail causing high amp draw.
Movement of the water curtain controls bin switch
operation. The bin switch has two main functions:
1. Terminating the harvest cycle and returning the ice
machine to the freeze cycle.
Specifications
The main fuse is 250 Volt, 7 amp.
This occurs when the bin switch is opened and
closed again within 7 seconds during the harvest
cycle.
Check Procedure
! Warning
High (line) voltage is applied to the control board
(terminals #55 and #56) at all times. Removing the
control board fuse or moving the toggle switch to
OFF will not remove the power supplied to the
control board.
1. If the bin switch light is on with the water curtain
closed, the fuse is good.
! Warning
2. Automatic ice machine shut-off.
If the storage bin is full at the end of a harvest cycle,
the sheet of cubes fails to clear the water curtain and
holds it open. After the water curtain is held open for
7 seconds, the ice machine shuts off. The ice
machine remains off until enough ice is removed
from the storage bin to allow the sheet of cubes to
drop clear of the water curtain. As the water curtain
swings back to the operating position, the bin switch
closes and the ice machine restarts, provide the
three-minute delay has expired.
Disconnect electrical power to the entire ice
machine before proceeding.
2. Remove the fuse. Check the resistance across the
fuse with an ohm meter.
Reading
Open (OL)
Closed (O)
Result
Replace fuse
Fuse is good
Important
The water curtain must be ON (bin switch(s) closed)
to start ice making.
Specifications
The bin switch is a magnetically operated reed switch.
The magnet is attached to the lower right corner of the
water curtain. The switch is attached to the evaporatormounting bracket.
The bin switch is connected to a varying D.C. voltage
circuit. (Voltage does not remain constant.)
NOTE: Because of a wide variation in D.C. voltage, it is
not recommended that a voltmeter be used to check bin
switch operation.
6-38
Part No. 80-1100-3
Section 6
Check Procedure
1. Set the toggle switch to OFF.
2. Watch the bin switch light on the control board.
3. Move the water curtain toward the evaporator. The
bin switch must close. The bin switch light “on”
indicates the bin switch has closed properly.
Move the water curtain away from the evaporator. The
bin switch must open. The bin switch light “off” indicates
the bin switch has opened properly.
Electrical System
Water Curtain Removal Notes
The water curtain must be on (bin switch closed) to start
ice making. While a freeze cycle is in progress, the water
curtain can be removed and installed at any time without
interfering with the electrical control sequence.
If the ice machine goes into harvest sequence while the
water curtain is removed, one of the following will
happen:
•
Water curtain remains off:
When the harvest cycle time reaches 3.5 minutes
and the bin switch is not closed, the ice machine
stops as though the bin were full.
•
Water curtain is put back on:
If the bin switch closes prior to reaching the 3.5minute point, the ice machine immediately returns to
another freeze sequence prechill.
OHM Test
1. Disconnect the bin switch wires to isolate the bin
switch from the control board.
2. Connect an ohmmeter to the disconnected bin
switch wires.
3. Cycle the bin switch open and closed numerous
times by opening and closing the water curtain.
NOTE: To prevent misdiagnosis:
•
Always use the water curtain magnet to cycle the
switch (a larger or smaller magnet will affect switch
operation).
•
Watch for consistent readings when the bin switch is
cycled open and closed (bin switch failure could be
erratic).
Part No. 80-1100-3
6-39
Electrical System
Section 6
COMPRESSOR ELECTRICAL DIAGNOSTICS
Determine if the Compressor is Seized
The compressor will not start or will trip repeatedly on
overload.
Check the amp draw while the compressor is trying to
start.
Check Resistance (Ohm) Values
COMPRESSOR DRAWING LOCKED ROTOR
NOTE: Compressor windings can have very low ohm
values. Use a properly calibrated meter.
The two likely causes of this are:
Perform the resistance test after the compressor cools.
The compressor dome should be cool enough to touch
(below 120°F/49°C) to assure that the overload is closed
and the resistance readings will be accurate.
•
Defective starting component
•
Mechanically seized compressor
To determine which you have:
1. Install high and low side gauges.
SINGLE PHASE COMPRESSORS
2. Try to start the compressor.
1. Disconnect power from the cuber and remove the
wires from the compressor terminals.
3. Watch the pressures closely.
A. If the pressures do not move, the compressor is
seized. Replace the compressor.
2. The resistance values must be within published
guidelines for the compressor. The resistance
values between C and S and between C and R,
when added together, should equal the resistance
value between S and R.
3. If the overload is open, there will be a resistance
reading between S and R, and open readings
between C and S and between C and R. Allow the
compressor to cool, then check the readings again.
THREE PHASE COMPRESSORS
1. Disconnect power from the cuber and remove the
wires from the compressor terminals.
2. The resistance values must be within published
guidelines for the compressor. The resistance
values between L1 and L2, between L2 and L3, and
between L3 and L1 should all be equal.
3. If the overload is open, there will be open readings
between L1 and L2, between L2 and L3, and
between L3 and L1. Allow the compressor to cool,
then check the readings again.
B. If the pressures move, the compressor is turning
slowly and is not seized. Check the capacitors
and start relay.
COMPRESSOR DRAWING HIGH AMPS
The continuous amperage draw on start-up should not
be near the maximum fuse size indicated on the serial
tag.
The voltage when the compressor is trying to start must
be within ±10% of the nameplate voltage.
Diagnosing Capacitors
•
If the compressor attempts to start, or hums and trips
the overload protector, check the starting
components before replacing the compressor.
•
Visual evidence of capacitor failure can include a
bulged terminal end or a ruptured membrane. Do not
assume a capacitor is good if no visual evidence is
present.
•
A good test is to install a known good substitute
capacitor.
•
Use a capacitor tester when checking a suspect
capacitor. Clip the bleed resistor off the capacitor
terminals before testing.
Check Motor Windings to Ground
Check continuity between all three terminals and the
compressor shell or copper refrigeration line. Scrape
metal surface to get good contact. If continuity is
present, the compressor windings are grounded and the
compressor should be replaced.
6-40
Part No. 80-1100-3
Section 6
Electrical System
PTCR DIAGNOSTICS
Compressor Start Sequence
What is a PTCR?
PTCR’s provide additional starting torque by increasing
the current in the auxiliary (start) winding during starting.
The PTCR is wired across the run capacitor (in series
with the start winding).
A PTCR (or Positive Temperature Coefficient Resistor) is
made from high-purity, semi-conducting ceramics.
A PTCR is useful because of its resistance versus
temperature characteristic. The PTCR has a low
resistance over a wide (low) temperature range, but
upon reaching a certain higher temperature, its
resistance greatly increases, virtually stopping current
flow. When the source of heat is removed, the PTCR
returns to its initial base resistance.
In severe duty cycles, it can be used to repeatedly
switch (virtually stop) large currents at line voltages.
PTCR’s have been used for many years in millions of
HVAC applications. In place of using the conventional
start relay/start capacitor, a simple PTCR provides the
starting torque assistance to PSC (Permanent Split
Capacitor) single-phase compressors, which can
equalize pressures before starting.
1. It is important for the refrigerant discharge and
suction pressures to be somewhat equalized prior to
the compressor starting. To assure equalization of
pressures the harvest valve (and HPR valve on
remotes) will energize for 45 seconds prior to
compressor starting. The harvest valve (and HPR
valve on remotes) remains on for an additional 5
seconds while the compressor is starting.
2. When starting the compressor, the contactor closes
and the PTCR, which is at a low resistance value,
allows high starting current to flow in the start
winding.
3. The current passing through the PTCR causes it to
rapidly heat up, and after approximately .25-1
second it abruptly “switches” to a very high
resistance, virtually stopping current flow through it.
4. At this point the motor is up to speed and all current
going through the start winding will now pass
through the run capacitor.
5. The PTCR remains hot and at a high resistance as
long as voltage remains on the circuit.
6. It is important to provide time between compressor
restarts to allow the PTCR to cool down to near its
initial temperature (low resistance). When the
contactor opens to stop the compressor, the PTCR
cools down to its initial low resistance and is again
ready to provide starting torque assistance. To
assure the PTCR has cooled down, during an
automatic shut-off, the Q model ice machines have a
built-in 3-minute off time before it can restart.
Part No. 80-1100-3
6-41
Electrical System
Section 6
Q-Model Automatic Shut-Off and Restart
Troubleshooting PTCR’s
When the storage bin is full at the end of a harvest cycle,
the sheet of cubes fails to clear the water curtain and will
hold it open. After the water curtain is held open for 7
seconds, the ice machine shuts off. To assure the PTCR
has cooled, the ice machine remains off for 3 minutes
before it can automatically restart.
WHY A GOOD PTCR MAY FAIL
TO START THE COMPRESSOR
The ice machine remains off until enough ice has been
removed from the storage bin to allow the ice to fall clear
of the water curtain. As the water curtain swings back to
operating position, the bin switch closes and the ice
machine restarts, provided the three-minute delay period
is complete.
L1
L2
CONTACTOR
CONTACTS
C
R
For example, if the PTCR is properly cooled, say 60°F
(15.6°C) when the compressor starts, it will take .25 to
1.0 seconds before its temperature reaches 260°F
(126.6°C), and current flow is stopped.
If the PTCR is still warm, say 160°F (71.1°C) when the
compressor starts, it will take only .125 to .50 seconds
before its temperature reaches 260°F (126.6°C), and
current flow is stopped. This decreased time may be
insufficient to start the compressor.
A good PTCR may be too hot to operate properly at
start-up because:
RUN CAPACITOR
R
The PTCR must be cooled before attempting to start the
compressor, otherwise the high starting torque may not
last long enough.
R
•
The ice machine’s 3-minute delay has been
overridden. Opening and closing the service
disconnect or cycling the toggle switch from OFF to
ICE will override the delay period.
•
The control box temperature is too high. Though
rare, very high air temperatures (intense sunlight,
etc.) can greatly increase the temperature of the
control box and its contents. This may require a
longer off time to allow the PTCR to cool.
•
The compressor has short-cycled, or the compressor
overload has opened. Move the toggle switch to OFF
and allow the compressor and PTCR to cool.
S
COMPRESSOR
SV1506
PTCR
Figure 6-15. During Start-Up (First .25 - 1.0 Seconds)
L2
L1
CONTACTOR
CONTACTS
C
R
RUN CAPACITOR
R
Continued on next page …
R
S
COMPRESSOR
PTCR
SV1507
Figure 6-16. After Start-Up
(Current Flows Through Run Capacitor)
6-42
Part No. 80-1100-3
Section 6
Electrical System
There are other problems that may cause compressor
start-up failure with a good PTCR in a new, properly
wired ice machine.
•
The voltage at the compressor during start-up is too
low.
Manitowoc ice machines are rated at ±10% of
nameplate voltage at compressor start-up. (Ex: An
ice machine rated at 208-230 should have a
compressor start-up voltage between 187 and 253
volts.)
•
The compressor discharge and suction pressures
are not matched closely enough or equalized.
These two pressures must be somewhat equalized
before attempting to start the compressor. The
harvest valve (and HPR valve on remotes) energizes
for 45 seconds before the compressor starts, and
remains on 5 seconds after the compressor starts.
Make sure this is occurring and the harvest valve
(and HPR solenoid) coil is functional before
assuming that the PTCR is bad.
Model
Q200
Q280
Q320
Q420
Q450
Q600
Q800
Q1000
Q1300
Q1600
Q1800
Room
Manitowoc
Cera-Mite
Temperature
Part Number Part Number
Resistance
8505003
305C20
22-50 Ohms
8504993
305C19
18-40 Ohms
8504913
305C9
8-22 Ohms
CHECKING THE PTCR
! Warning
Disconnect electrical power to the entire ice
machine at the building electrical disconnect box
before proceeding.
SV1540
1. Visually inspect the PTCR. Check for signs of
physical damage.
Figure 6-17. Manitowoc PTCR’s 8505003 & 8504993
NOTE: The PTCR case temperature may reach 210°F
(100°C) while the compressor is running. This is normal.
Do not change a PTCR just because it is hot.
2. Wait at least 10 minutes for the PTCR to cool to
room temperature.
3. Remove the PTCR from the ice machine.
4. Measure the resistance of the PTCR as shown
below. If the resistance falls outside of the
acceptable range, replace it.
SV1541
Figure 6-18. Manitowoc PTCR 8504913
Part No. 80-1100-3
6-43
Electrical System
Section 6
ICE/OFF/CLEAN TOGGLE SWITCH
CONTROL BOARD RELAYS
Function
Function
The switch is used to place the ice machine in ICE, OFF
or CLEAN mode of operation.
The control board relays energize and de-energize
system components.
Specifications
Specifications
Double-pole, double-throw switch. The switch is
connected into a varying low D.C. voltage circuit.
Relays are not field replaceable. There are five relays on
the control board:
Check Procedure
NOTE: Because of a wide variation in D.C. voltage, it is
not recommended that a volt meter be used to check
toggle switch operation.
1. Inspect the toggle switch for correct wiring.
2. Isolate the toggle switch by disconnecting all wires
from the switch, or by disconnecting the Molex
connector and removing wire #69 from the toggle
switch.
Relay
#1
#2
#3
#4
#5
Controls
Water Pump
Water Inlet Valve
Harvest Valve / HPR Valve (Remotes)
Water Dump Valve
Contactor (Self-Contained)
Contactor / Liquid Line Solenoid (Remotes)
3. Check across the toggle switch terminals using a
calibrated ohm meter. Note where the wire numbers
are connected to the switch terminals, or refer to the
wiring diagram to take proper readings.
Switch Setting
ICE
CLEAN
OFF
Terminals
66-62
67-68
67-69
66-62
67-68
67-69
66-62
67-68
67-69
Ohm Reading
Open
Closed
Open
Closed
Open
Closed
Open
Open
Open
4. Replace the toggle switch if ohm readings do not
match all three switch settings.
6-44
Part No. 80-1100-3
Section 6
Electrical System
ELECTRONIC CONTROL BOARD
AC LINE VOLTAGE
ELECTRICAL
PLUG (NUMBERS
MARKED ON
WIRES)
CLEAN LIGHT
YELLOW
WATER LEVEL
PROBE LIGHT
GREEN
MAIN FUSE (7A)
BIN SWITCH
LIGHT GREEN
AUTOMATIC
CLEANING
SYSTEM (AuCS)
ACCESSORY PLUG
HARVEST LIGHT/
SAFETY LIMIT
CODE LIGHT
RED
ICE THICKNESS
PROBE (3/16''
CONNECTION)
1C
WATER LEVEL
PROBE
1F
JUMPER USED
ON Q1300/Q1600/
Q1800 ONLY
1G
67
68
62
DC LOW VOLTAGE
ELECTRICAL PLUG
(NUMBERS
MARKED ON
WIRES)
63
65
SV1588
Figure 6-19. Control Board
Part No. 80-1100-3
6-45
Electrical System
Section 6
General
Inputs
Q-Model control boards use a dual voltage transformer.
This means only one control board is needed for both
115V and 208-230V use.
The control board, along with inputs, controls all
electrical components, including the ice machine
sequence of operation. Prior to diagnosing, you must
understand how the inputs affect the control board
operation.
Safety Limits
In addition to standard safety controls, such as the high
pressure cut-out, the control board has built-in safety
limits.
These safety limits protect the ice machine from major
component failures. For more information, see “Safety
Limits” on Page 7-13.
Refer to specific component specifications (inputs),
wiring diagrams and ice machine sequence of operation
sections for details.
As an example, refer to “Ice Thickness Probe” on the
next page for information relating to how the probe and
control board function together.
This section will include items such as:
6-46
•
How a harvest cycle is initiated
•
How the harvest light functions with the probe
•
Freeze time lock-in feature
•
Maximum freeze time
•
Diagnosing ice thickness control circuitry
Part No. 80-1100-3
Section 6
Electrical System
Ice Thickness Probe (Harvest Initiation)
MAXIMUM FREEZE TIME
HOW THE PROBE WORKS
The control system includes a built-in safety which will
automatically cycle the ice machine into harvest after 60
minutes in the freeze cycle.
Manitowoc’s electronic sensing circuit does not rely on
refrigerant pressure, evaporator temperature, water
levels or timers to produce consistent ice formation.
As ice forms on the evaporator, water (not ice) contacts
the ice thickness probe. After the water completes this
circuit across the probe continuously for 6-10 seconds, a
harvest cycle is initiated.
ICE THICKNESS CHECK
The ice thickness probe is factory-set to maintain the ice
bridge thickness at 1/8" (3.2 mm).
NOTE: Make sure the water curtain is in place when
performing this check. It prevents water from splashing
out of the water trough.
1. Inspect the bridge connecting the cubes. It should
be about 1/8" (3.2 mm) thick.
2. If adjustment is necessary, turn the ice thickness
probe adjustment screw clockwise to increase
bridge thickness, or counterclockwise to decrease
bridge thickness.
NOTE: Turning the adjustment 1/3 of a turn will change
the ice thickness about 1/16" (1.5 mm).
SV1730A
ADJUSTING SCREW
Figure 6-20. Ice Thickness Probe
HARVEST/SAFETY LIMIT LIGHT
1/8” ICE BRIDGE THICKNESS
This light’s primary function is to be on as water contacts
the ice thickness probe during the freeze cycle, and
remain on throughout the entire harvest cycle. The light
will flicker as water splashes on the probes.
SV1208
Figure 6-21. Ice Thickness Check
The light’s secondary function is to continuously flash
when the ice machine is shut off on a safety limit, and to
indicate which safety limit shut off the ice machine.
Make sure the ice thickness probe wire and the bracket
do not restrict movement of the probe.
FREEZE TIME LOCK-IN FEATURE
Ice Thickness Probe Cleaning
The ice machine control system incorporates a freeze
time lock-in feature. This prevents the ice machine from
short cycling in and out of harvest.
1. Mix a solution of Manitowoc ice machine cleaner
and water (2 ounces of cleaner to 16 ounces of
water) in a container.
The control board locks the ice machine in the freeze
cycle for six minutes. If water contacts the ice thickness
probe during these six minutes, the harvest light will
come on (to indicate that water is in contact with the
probe), but the ice machine will stay in the freeze cycle.
After the six minutes are up, a harvest cycle is initiated.
This is important to remember when performing
diagnostic procedures on the ice thickness control
circuitry.
2. Soak ice thickness probe in container of cleaner/
water solution while disassembling and cleaning
water circuit components (soak ice thickness probe
for 10 minutes or longer).
To allow the service technician to initiate a harvest cycle
without delay, this feature is not used on the first cycle
after moving the toggle switch OFF and back to ICE.
3. Clean all ice thickness probe surfaces including all
plastic parts (do not use abrasives). Verify the ice
thickness probe cavity is clean. Thoroughly rinse ice
thickness probe (including cavity) with clean water,
then dry completely. Incomplete rinsing and
drying of the ice thickness probe can cause
premature harvest.
4. Reinstall ice thickness probe, then sanitize all ice
machine and bin/dispenser interior surfaces.
Part No. 80-1100-3
6-47
Electrical System
Section 6
DIAGNOSING ICE THICKNESS CONTROL CIRCUITRY
Ice Machine Does Not Cycle Into Harvest When Water Contacts The Ice Thickness Control Probe
Step 1 Bypass the freeze time lock-in feature by moving the ICE/OFF/CLEAN switch to OFF and back to ICE. Wait
until the water starts to flow over the evaporator.
Step 2 Clip the jumper wire leads to the ice thickness probe and any cabinet ground.
ICE THICKNESS PROBE
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST/SAFETY LIMIT LIGHT
EVAPORATOR
GROUND
SV3010
JUMPER WIRE
SV1588A
Figure 6-22. Step 2
Step 2 Jumper wire connected from probe to ground
Monitoring of Harvest Light
Correction
The harvest light comes on, and 6-10 seconds later, ice
The ice thickness control circuitry is functioning properly. Do
machine cycles from freeze to harvest.
not change any parts.
The harvest light comes on but the ice machine stays in the
The ice thickness control circuitry is functioning properly. The
freeze sequence.
ice machine is in a six-minute freeze time lock-in. Verify step 1
of this procedure was followed correctly.
The harvest light does not come on.
Proceed to Step 3, below.
Step 3 Disconnect the ice thickness probe from the control board at terminal 1C. Clip the jumper wire leads to
terminal 1C on the control board and any cabinet ground. Monitor the harvest light.
ICE THICKNESS PROBE
CLEAN LIGHT
WATER LEVEL LIGHT
EVAPORATOR
BIN SWITCH LIGHT
JUMPER WIRE
HARVEST/SAFETY LIMIT LIGHT
1C
GROUND
SV3011
SV1588G
Figure 6-23. Step 3
Step 3 Jumper wire connected from control board terminal 1C to ground
Monitoring of Harvest Light
Correction
The harvest light comes on, and 6-10 seconds later, ice
The ice thickness probe is causing the malfunction.
machine cycles from freeze to harvest.
The harvest light comes on but the ice machine stays in the
The control circuitry is functioning properly. The ice machine is
freeze sequence.
in a six-minute freeze time lock-in (verify step 1 of this
procedure was followed correctly).
The harvest light does not come on.
The control board is causing the malfunction.
6-48
Part No. 80-1100-3
Section 6
Electrical System
Ice Machine Cycles Into Harvest Before Water Contact With The Ice Thickness Probe
Step 1 Bypass the freeze time lock-in feature by moving the ICE/OFF/CLEAN switch to OFF and back to ICE. Wait
until the water starts to flow over the evaporator, then monitor the harvest light.
Step 2 Disconnect the ice thickness probe from the control board at terminal 1C.
ICE THICKNESS PROBE
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST/SAFETY LIMIT LIGHT
SV3011
SV1588
Figure 6-24. Step 2
Step 2 Disconnect probe from control board terminal 1C.
Monitoring of Harvest Light
Correction
The harvest light stays off and the ice machine remains in the
The ice thickness probe is causing the malfunction.
freeze sequence.
Verify that the Ice Thickness probe is adjusted correctly.
The harvest light comes on, and 6-10 seconds later, the ice
The control board is causing the malfunction.
machine cycles from freeze to harvest.
Part No. 80-1100-3
6-49
Electrical System
Section 6
Water Level Control Circuitry
FREEZE CYCLE CIRCUITRY
WATER LEVEL PROBE LIGHT
Manitowoc’s electronic sensing circuit does not rely on
float switches or timers to maintain consistent water
level control. During the freeze cycle, the water inlet
valve energizes (turns on) and de-energizes (turns off) in
conjunction with the water level probe located in the
water trough.
The water level probe circuit can be monitored by
watching the water level light. The water level light is on
when water contacts the probe, and off when no water is
in contact with the probe. The water level light functions
any time power is applied to the ice machine, regardless
of toggle switch position.
During the first 45 seconds of the Freeze Cycle:
•
The water inlet valve is on when there is no water in
contact with the water level probe.
•
The water inlet valve turns off after water contacts
the water level probe for 3 continuous seconds.
•
The water inlet valve will cycle on and off as many
times as needed to fill the water trough.
After 45 seconds into the Freeze Cycle:
The water inlet valve will cycle on, and then off one more
time to refill the water trough. The water inlet valve is
now off for the duration of the freeze sequence.
HARVEST CYCLE CIRCUITRY
The water level probe does not control the water inlet
valve during the harvest cycle. During the harvest cycle
water purge, the water inlet valve energizes (turns on)
and de-energizes (turns off) strictly by time. The harvest
water purge adjustment dial may be set at 15, 30 or 45
seconds.
CONTROL BOARD
SV1616
HARVEST
WATER PURGE
ADJUSTMENT
30
45
Figure 6-25. Freeze Cycle Water Level Setting
During the freeze cycle, the water level probe is set to
maintain the proper water level above the water pump
housing. The water level is not adjustable. If the water
level is incorrect, check the water level probe for
damage (probe bent, etc.). Repair or replace the probe
as necessary.
15
SV1617
WATER INLET VALVE SAFETY SHUT-OFF
In the event of a water level probe failure, this feature
limits the water inlet valve to a six-minute on time.
Regardless of the water level probe input, the control
board automatically shuts off the water inlet valve if it
remains on for 6 continuous minutes. This is important to
remember when performing diagnostic procedures on
the water level control circuitry.
6-50
NOTE: The water purge must be at the factory setting
of 45 seconds for the water inlet valve to energize during
the last 15 seconds of the Water Purge. If set at 15 or 30
seconds the water inlet valve will not energize during the
harvest water purge.
Part No. 80-1100-3
Section 6
Electrical System
DIAGNOSING FREEZE CYCLE POTABLE WATER
LEVEL CONTROL CIRCUITRY
Problem: Water Trough Overfilling During The
Freeze Cycle
Step 2 Wait until the freeze cycle starts
(approximately 45 seconds, the freeze cycle starts when
the compressor energizes) then connect a jumper from
the water level probe to any cabinet ground.
Step 1 Start a new freeze sequence by moving the ICE/
OFF/CLEAN toggle switch to OFF, then back to ICE.
Important
This restart must be done prior to performing
diagnostic procedures. This assures the ice
machine is not in a freeze cycle water inlet valve
safety shut-off mode. You must complete the entire
diagnostic procedure within 6 minutes of starting.
Important
For the test to work properly you must wait until the
freeze cycle starts, prior to connecting the jumper
wire. If you restart the test you must disconnect the
jumper wire, restart the ice machine, (step 1) and
then reinstall the jumper wire after the compressor
starts.
YELLOW
GR EE N
GR EE N
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
R ED
HARVEST/SAFETY LIMIT LIGHT
1C
1F
GR O U N D
JUMP ER
SV1621a
Figure 6-26. Step 2
Is water flowing into the
water trough?
no
Step 2 Jumper wire connected from probe to ground
The Water Inlet Valve
The Water Level Light is:
Solenoid Coil is:
on
De-Energized
yes
on
De-Energized
yes
off
Energized
Cause
This is normal operation.
Do not change any parts.
The water inlet valve is
causing the problem.
Proceed to step 3.
Continued on next page …
Part No. 80-1100-3
6-51
Electrical System
Section 6
Problem: Water Trough Overfilling During The
Freeze Cycle (continued)
Step 3 Allow ice machine to run. Disconnect the water
level probe from control board terminal 1F, and connect
a jumper wire from terminal 1F to any cabinet ground.
1
Remember if you are past 6 minutes from starting, the
ice machine will go into a freeze cycle water inlet valve
safety shut-off mode, and you will be unable to complete
this test. If past 6 minutes you must restart this test by
disconnecting the jumper wire, restarting the ice
machine, (step 1) and then reinstalling the jumper wire to
terminal 1F, after the compressor starts.
YELLOW
GREEN
WATER LEVEL LIGHT
GREEN
BIN SWITCH LIGHT
RED
G R O U ND
JUMPER
CLEAN LIGHT
HARVEST/SAFETY LIMIT LIGHT
1C
1F
SV1588b
Figure 6-27. Step 3
Is water flowing into
the water trough?
no
yes
yes
6-52
Step 3 Jumper wire connected from control board terminal 1F to ground
The Water Level
The Water Inlet Valve
Cause
Light is:
Solenoid Coil is:
The water level probe is causing the problem.
on
De-Energized
Clean or replace the water level probe.
off
Energized
The control board is causing the problem.
on
De-Energized
The water fill valve is causing the problem.
Part No. 80-1100-3
Section 6
Electrical System
Problem: Water Will Not Run Into The Sump Trough
During The Freeze Cycle
Step 1 Verify water is supplied to the ice machine, and
then start a new freeze sequence by moving the ICE/
OFF/CLEAN toggle switch to OFF then back to ICE.
Step 2 Wait until the freeze cycle starts (approximately
45 seconds, the freeze cycle starts when the
compressor energizes), and then refer to chart.
Important
This restart must be done prior to performing
diagnostic procedures. This assures the ice machine
is not in a freeze cycle water inlet valve safety shutoff mode. You must complete the entire diagnostic
procedure within 6 minutes of starting.
Is water flowing into
the water trough?
yes
no
Step 2 Checking for normal operation
The Water Level
The Water Inlet Valve
Cause
Light is:
Solenoid Coil is:
off
Energized
This is Normal Operation don’t change any parts
on or off
Energized Or De-Energized
Proceed to step 3
Step 3 Leave the ice machine run, then disconnect the
water level probe from control board terminal 1F.
Important
For the test to work properly you must wait until the
freeze cycle starts, prior to disconnecting the water
level probe. If you restart the test you must
reconnect the water level probe, restart the ice
machine, (step 1) and then disconnect the water
level probe after the compressor starts.
YELLOW
DISCONNECT
WATER LEVEL
PROBE FROM
TERMINAL 1F
CLEAN LIGHT
GREEN
WATER LEVEL LIGHT
GREEN
BIN SWITCH LIGHT
RED
HARVEST/SAFETY LIMIT
LIGHT
1C
1F
SV1621G
SV1588
Figure 6-28. Step 3
Is water flowing into
the water trough?
yes
no
no
Part No. 80-1100-3
Step 3 Disconnect water level probe from control board terminal 1F
The Water Level
The Water Inlet Valve
Cause
Light is:
Solenoid Coil is:
off
Energized
The water level probe is causing the problem.
Clean or replace the water level probe.
off
Energized
The water inlet valve is causing the problem.
on or off
De-Energized
The control board is causing the problem.
6-53
Electrical System
Section 6
Diagnosing An Ice Machine That Will Not Run
! Warning
High (line) voltage is applied to the control board
(terminals #55 and #56) at all times. Removing
control board fuse or moving the toggle switch to
OFF will not remove the power supplied to the
control board.
Step
1
2
3
4
5
6
7
Check
Verify primary voltage supply to ice
machine.
Verify the high-pressure cutout is closed.
Verify control board fuse is OK.
Verify the bin switch functions properly.
Verify ICE/OFF/CLEAN toggle switch
functions properly.
Verify low DC voltage is properly
grounded.
Replace the control board.
Notes
Verify that the fuse or circuit breaker is closed.
The H.P.C.O. is closed if primary power voltage is present at terminals
#55 and #56 on the control board.
If the bin switch light functions, the fuse is OK.
A defective bin switch can falsely indicate a full bin of ice.
A defective toggle switch may keep the ice machine in the OFF mode.
Loose DC wire connections may intermittently stop the ice machine.
Be sure Steps 1-6 were followed thoroughly. Intermittent problems are
not usually related to the control board.
NOTE: Refer to wiring diagram on Page 6-55 for component and sequence identification.
6-54
Part No. 80-1100-3
Section 6
Electrical System
Q0420/Q0450/Q0600/Q0800/Q1000 - SELF CONTAINED 1 PHASE WITH TERMINAL BOARD
CAUTION: DISCONNECT POWER BEFORE WORKING
SEE SERIAL PLATE FOR VOLTAGE
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
L1
L2 (N)
1
(61)
TB35
WATER
VALVE
(60)
HIGH PRES
CUTOUT
(77)
2
(80)
HARVEST
SOLENOID
4
2
(22)
(21)
(20)
(55)
TB32
1
(76)
3
(57)
FUSE (7A)
TB30
WATER
PUMP
(58)
TB37
3
(59)
TERMINATES AT
PIN CONNECTION
(73)
ICE THICKNESS PROBE
(64)
TB30
1F
1G
4
CLEAN LIGHT
LOW D.C.
VOLTAGE
PLUG
WATER LEVEL LIGHT
(62)
BIN SWITCH LIGHT
(63)
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
BIN SWITCH
(65)
(67)
6
(66)
TOGGLE SWITCH
(68)
ICE
(66)
(47)
R
(42)
66
67
62
CLEAN
69
(49)
COMPRESSOR
*OVERLOAD
68
INTERNAL WORKING
VIEW
OFF
5
CONTACTOR
CONTACTS
VIEW FOR WIRING
(69)
(62)
TB35
CONTACTOR
COIL
(56)
NOT USED
(74)
TB30
1C
WATER LEVEL PROBE
TB30
(99)
(98)
TB31
TRANS.
(75)
(81)
DUMP
SOLENOID
5
RUN CAPACITOR
R
R
S
(46)
(50)
TB30
C
(45)
(48)
L1
(51)
PTCR
(52)
(85)
(86)
TB33
(53)
TB34
FAN CYCLE CONTROL
TB30
RUN CAPACITOR**
Part No. 80-1100-3
FAN MOTOR
(AIR COOLED ONLY)
SV2071
6-55
Electrical System
Section 6
THIS PAGE INTENTIONALLY LEFT BLANK
6-56
Part No. 80-1100-3
Section 7
Refrigeration System
Sequence of Operation
SELF-CONTAINED AIR OR WATER -COOLED MODELS
EVAPORATOR
HEAT
EXCHANGER
EXPANSION VALVE
HARVEST SOLENOID VALVE
X
AIR OR WATER
CONDENSER
COMPRESSOR
STRAINER
DRIER
RECEIVER
(WATER COOLED ONLY)
HIGH PRESSURE VAPOR
HIGH PRESSURE LIQUID
LOW PRESSURE LIQUID
LOW PRESSURE VAPOR
SV1569
Figure 7-1. Self-Contained Prechill and Freeze Cycle
(Models Q200/Q280/Q320/Q370/Q420/Q450/Q600/Q800/Q1000)
Prechill Refrigeration Sequence
Freeze Cycle Refrigeration Sequence
No water flows over the evaporator during the prechill.
The refrigerant absorbs heat (picked up during the
harvest cycle) from the evaporator. The suction pressure
decreases during the prechill.
The refrigerant absorbs heat from water running over the
evaporator surface. The suction pressure gradually
drops as ice forms.
Part No. 80-1100-3
7-1
Refrigeration System
Section 7
E V A P O R A TO R
HEAT
EXCH A N G E R
EXPANSION VALVE
HARVEST SOLENOID VALVE
COMPRESSOR
STRAINER
AIR OR WATER
CONDENSER
DRI ER
RECEIVER
( WA T E R C O O L E D O N L Y )
HIGH PRESSURE VAP O R
HIGH PRESSURE LIQUID
LOW PRESSURE LIQUID
LOW PRESSURE VAPOR
SV1570
Figure 7-2. Self-Contained Harvest Cycle (Models Q200/Q280/Q320/Q370/Q420/Q450/Q600/Q800/Q1000)
Harvest Cycle Refrigeration Sequence
Hot gas flows through the energized harvest valve,
heating the evaporator. The harvest valve is sized to
allow the proper amount of refrigerant into the
evaporator. This specific sizing (along with the proper
system refrigerant charge) assures proper heat transfer,
without the refrigerant condensing and slugging the
compressor.
7-2
Part No. 80-1100-3
Section 7
Refrigeration System
REMOTE MODELS
EVAPORATOR
HEAT
EXCHANGER
EXPANSION VALVE
STRAINER
X
COMPRESSOR
HARVEST SOLENOID VALVE
REMOTE
CONDENSER
CHECK VALVE
LIQUID
LINE
SOLENOID
VALVE
HARVEST PRESSURE
REGULATING VALVE
HEAD
PRESSURE
CONTROL
VALVE
X
DRIER
H.P.R. SOLENOID
VALVE
R
CHECK VALVE
B
C
RECEIVER
SERVICE
VALVE
RECEIVER
HIGH PRESSURE VAPOR
HIGH PRESSURE LIQUID
LOW PRESSURE LIQUID
LOW PRESSURE VAPOR
SV1566
Figure 7-3. Remote Pre-Chill and Freeze Cycle (Models Q450/Q600/Q800/Q1000)
Prechill Refrigeration Sequence
Freeze Cycle Refrigeration Sequence
No water flows over the evaporator during the prechill.
The refrigerant absorbs heat (picked up during the
harvest cycle) from the evaporators. The suction
pressure decreases during the prechill.
The refrigerant absorbs heat from the water running over
the evaporator surface. The suction pressure gradually
drops as ice forms.
Part No. 80-1100-3
The headmaster control valve maintains discharge
pressure in ambient temperatures below 70°F (21.1°C).
(See “Headmaster Control Valve” on Page 7-30.)
7-3
Refrigeration System
Section 7
EVAPORATOR
HEAT
EXCHANGER
EXPANSION VALVE
STRAINER
COMPRESSOR
HARVEST SOLENOID VALVE
REMOTE
CONDENSER
CHECK VALVE
LIQUID
LINE
SOLENOID
VALVE
HEAD
PRESSURE
CONTROL
VALVE
HARVEST PRESSURE
REGULATING VALVE
DRIER
RECEIVER
SERVICE
VALVE
B
H.P.R. SOLENOID
VALVE
R
CHECK VALVE
C
RECEIVER
HIGH PRESSURE VAPOR
HIGH PRESSURE LIQUID
LOW PRESSURE LIQUID
LOW PRESSURE VAPOR
SV1567
Figure 7-4. Remote Harvest Cycle (Models Q450/Q600/Q800/Q1000)
Harvest Cycle Refrigeration Sequence
Hot gas flows through the energized harvest valve,
heating the evaporator. The harvest valve is sized to
allow the proper amount of hot gas into the evaporator.
This specific harvest valve sizing, along with the harvest
pressure regulating (H.P.R.) system, assures proper
heat transfer, without the hot gas condensing to liquid
and slugging the compressor.
The harvest pressure regulating (H.P.R.) valve helps
maintain the suction pressure during the harvest cycle.
(See “H.P.R. System” on Page 7-27.)
7-4
Part No. 80-1100-3
Section 7
Refrigeration System
EVAPORATOR
HEAT
EXCHANGER
EXPANSION VALVE
STRAINER
X
COMPRESSOR
HARVEST SOLENOID VALVE
REMOTE
CONDENSER
CHECK VALVE
X
LIQUID
LINE
SOLENOID
VALVE
HEAD
PRESSURE
CONTROL
VALVE
HARVEST PRESSURE
REGULATING VALVE
DRIER
X
RECEIVER
SERVICE
VALVE
H.P.R. SOLENOID
VALVE
B
R
CHECK VALVE
C
RECEIVER
LIQUID/VAPOR EQUALIZED TO AMBIENT CONDITIONS
SV1568
Figure 7-5. Remote Automatic Shut-Off (Models Q450/Q600/Q800/Q1000)
Automatic Shut-Off
The compressor and liquid line solenoid valve are deenergized simultaneously when the contactor contacts
open.
During the off cycle, the check valve prevents refrigerant
from migrating back into the high side, and the liquid line
solenoid prevents refrigerant from migrating back into
the low side. This protects the compressor from
refrigerant migration during the off cycle, preventing
refrigerant slugging upon start-up.
Part No. 80-1100-3
7-5
Refrigeration System
Section 7
Q1300/Q1600/Q1800 REFRIGERATION TUBING SCHEMATICS
EVAPORATOR
HEAT
EXCHANGE
HARVEST
SOLENOID VALVE
EXPANSION VALVE
x
x
EXPANSION VALVE
HARVEST
SOLENOID VALVE
STRAINER
COMPRESSOR
AIR OR WATER COOLED
CONDENSER
DRIER
RECEIVER
SV1512
Figure 7-6. Q1300/Q1600/Q1800 Self-Contained Air- or Water-Cooled Models
NOTE: The refrigeration sequence for self-contained
dual expansion valve ice machines is identical to selfcontained single expansion valve ice machines. See
Pages 7-1 and 7-2 for sequence of operation.
7-6
Part No. 80-1100-3
Section 7
Refrigeration System
EVAPORATOR
HEAT
EXCHANGE
EXPANSION VALVE
x
x
EXPANSION VALVE
HARVEST
SOLENOID VALVE
HARVEST
SOLENOID VALVE
X
COMPRESSOR
STRAINER
LIQUID
LINE
SOLENOID
VALVE
REMOTE
CONDENSER
CHECK VALVE
DRIER
HARVEST PRESSURE
REGULATING VALVE
RECEIVER
SERVICE
VALVE
X
HEAD
PRESSURE
CONTROL
VALVE
B
R
CHECK VALVE
C
H.P.R. SOLENOID
VALVE
RECEIVER
SV1513
Figure 7-7. Q1300/Q1600/Q1800 Remote Models
NOTE: The refrigeration sequence for remote dual
expansion valve ice machines is identical to remote
single expansion valve ice machines. See Pages 7-3,
7-4 and 7-5 for sequence of operation.
Part No. 80-1100-3
7-7
Refrigeration System
Operational Analysis (Diagnostics)
GENERAL
When analyzing the refrigeration system, it is important
to understand that different refrigeration component
malfunctions may cause very similar symptoms.
Also, many external factors can make good refrigeration
components appear bad. These factors can include
improper installation, or water system malfunctions such
as hot incoming water supply or water loss.
The following two examples illustrate how similar
symptoms can result in a misdiagnosis.
1. An expansion valve bulb that is not securely
fastened to the suction line and/or not insulated will
cause a good expansion valve to flood. If a service
technician fails to check for proper expansion valve
bulb mounting, he may replace the expansion valve
in error.
The ice machine now functions normally. The
technician erroneously thinks that the problem was
properly diagnosed and corrected by replacing the
expansion valve. Actually, the problem (loose bulb)
was corrected when the technician properly
mounted the bulb of the replacement expansion
valve.
Section 7
2. An ice machine that is low on charge may cause a
good expansion valve to starve. If a service
technician fails to verify the system charge, he may
replace the expansion valve in error.
During the replacement procedure, recovery,
evacuation and recharging are performed correctly.
The ice machine now functions normally. The
technician erroneously thinks that the problem was
properly diagnosed and corrected by replacing the
expansion valve.
The service technician’s failure to check the ice
machine for a low charge condition resulted in a
misdiagnosis and the needless replacement of a
good expansion valve.
When analyzing the refrigeration system, use the
Refrigeration System Operational Analysis Table. This
table, along with detailed checklists and references, will
help prevent replacing good refrigeration components
due to external problems.
The service technician’s failure to check the
expansion valve bulb for proper mounting (an
external check) resulted in a misdiagnosis and the
needless replacement of a good expansion valve.
7-8
Part No. 80-1100-3
Section 7
BEFORE BEGINNING SERVICE
Ice machines may experience operational problems only
during certain times of the day or night. A machine may
function properly while it is being serviced, but
malfunctions later. Information provided by the user can
help the technician start in the right direction, and may
be a determining factor in the final diagnosis.
Ask these questions before beginning service:
•
•
Refrigeration System
2. Refer to the appropriate 24 Hour Ice Production
Chart. (These charts begin on Page 7-33.) Use the
operating conditions determined in Step 1 to find
published 24 hour ice production: ______
3. Perform an actual ice production check. Use the
formula below.
__________
1.
When does the ice machine malfunction? (night, day,
all the time, only during the freeze cycle, etc.)
2.
When do you notice low ice production? (one day a
week, every day, on weekends, etc.)
Minutes in 24
Hours
3.
Weight of One
Harvest
•
Can you describe exactly what the ice machine
seems to be doing?
•
Has anyone been working on the ice machine?
•
Is anything (such as boxes) usually stored near or on
the ice machine which could obstruct airflow around
the machine?
•
During “store shutdown,” is the circuit breaker, water
supply or air temperature altered?
•
Is there any reason why incoming water pressure
might rise or drop substantially?
ICE PRODUCTION CHECK
The amount of ice a machine produces directly relates to
the operating water and air temperatures. This means
an ice machine in a 70°F (21.1°C) room with 50°F
(10.0°C) water produces more ice than the same model
ice machine in a 90°F (32.2°C) room with 70°F (21.1°C)
water.
1. Determine the ice machine operating conditions:
Air temp. entering condenser:
_______ °
Air temp. around ice machine:
_______ °
Water temp. entering sump trough: _______ °
+
Freeze Time
1440
__________
__________
=
Harvest Time
÷
__________
=
Total Cycle Time
x
__________
__________
Total Cycle Time
__________
Cycles Per Day
=
Cycles Per Day
__________
Actual 24 Hour Ice
Production
Important
Times are in minutes.
Example: 1 min., 15 sec. converts to 1.25 min.
(15 seconds ÷ 60 seconds = .25 minutes)
Weights are in pounds.
Example: 2 lb., 6 oz. converts to 2.375 lb.
(6 oz. ÷ 16 oz. = .375 lb.)
Weighing the ice is the only 100% accurate
check. However, if the ice pattern is normal and the
1/8" thickness is maintained, the ice slab weights
listed with the 24 Hour Ice Production Charts may
be used.
4. Compare the results of step 3 with step 2. Ice
production is normal when these numbers match
closely. If they match closely, determine if:
•
another ice machine is required.
•
more storage capacity is required.
•
relocating the existing equipment to lower the
load conditions is required.
Contact the local Manitowoc distributor for
information on available options and accessories.
Part No. 80-1100-3
7-9
Refrigeration System
Section 7
INSTALLATION/VISUAL INSPECTION CHECKLIST
Possible Problem
Ice machine is not level
Improper clearance around
top, sides and/or back of ice
machine
Air-cooled condenser filter is
dirty
Ice machine is not on an
independent electrical circuit
Water filtration is plugged (if
used)
Water drains are not run
separately and/or are not
vented
Remote condenser line set is
improperly installed
7-10
Corrective Action
Level the ice machine
Reinstall according to the
Installation Manual
Clean the condenser filter
and/or condenser
Reinstall according to the
Installation Manual
Install a new water filter
Run and vent drains
according to the Installation
Manual
Reinstall according to the
Installation Manual
WATER SYSTEM CHECKLIST
A water-related problem often causes the same
symptoms as a refrigeration system component
malfunction.
Example: A water dump valve leaking during the freeze
cycle, a system low on charge, and a starving TXV have
similar symptoms.
Water system problems must be identified and
eliminated prior to replacing refrigeration components.
Possible Problem
Water area (evaporator) is
dirty
Water inlet pressure not
between 20 and 80 psi
Incoming water temperature
is not between 35°F (1.7°C)
and 90°F (32.2°C).
Water filtration is plugged (if
used)
Water dump valve leaking
during the freeze cycle
Vent tube is not installed on
water outlet drain
Hoses, fittings, etc., are
leaking water
Water fill valve is stuck open
Water is spraying out of the
sump trough area
Uneven water flow across the
evaporator
Water is freezing behind the
evaporator
Plastic extrusions and
gaskets are not secured to
the evaporator
Water does not flow over the
evaporator (not trickle)
immediately after the prechill
Corrective Action
Clean as needed
Install a water regulator valve
or increase the water
pressure
If too hot, check the hot water
line check valves in other
store equipment
Install a new water filter
Clean/replace dump valve as
needed
See Installation Instructions
Repair/replace as needed
Clean/replace as needed
Stop the water spray
Clean the ice machine
Correct the water flow
Remount/replace as needed
Clean/replace water level
probe as needed
Part No. 80-1100-3
Section 7
Refrigeration System
ICE FORMATION PATTERN
2. Extremely Thin at Evaporator Outlet
Evaporator ice formation pattern analysis is helpful in ice
machine diagnostics.
There is no ice, or a considerable lack of ice formation
on the outlet of the evaporator (tubing outlet).
Analyzing the ice formation pattern alone cannot
diagnose an ice machine malfunction. However, when
this analysis is used along with Manitowoc’s
Refrigeration System Operational Analysis Table, it can
help diagnose an ice machine malfunction.
Examples: No ice at all on the outlet of the evaporator,
but ice forms on the intlet half of the evaporator. Or, the
ice at the outlet of the evaporator reaches 1/8" to initiate
a harvest, but the intlet of the evaporator already has
1/2" to 1" of ice formation.
Improper ice formation can be caused by any number of
problems.
Example: An ice formation that is “extremely thin on
outlet” could be caused by a hot water supply, a dump
valve leaking water, a faulty water fill valve, a low
refrigerant charge, etc.
Important
ICE
OUTLET
Keep the water curtain in place while checking the
ice formation pattern to ensure no water is lost.
1. Normal Ice Formation
Ice forms across the entire evaporator surface.
ICE
At the beginning of the freeze cycle, it may appear that
more ice is forming on the intlet of the evaporator than
on the outlet. At the end of the freeze cycle, ice
formation on the outlet will be close to, or just a bit
thinner than, ice formation on the intlet. The dimples in
the cubes at the outlet of the evaporator may be more
pronounced than those on the intlet. This is normal.
The ice thickness probe must be set to maintain the ice
bridge thickness at approximately 1/8". If ice forms
uniformly across the evaporator surface, but does not
reach 1/8" in the proper amount of time, this is still
considered normal.
INLET
SV1576
Figure 7-8. Extremely Thin Ice Formation at
Evaporator Outlet
Part No. 80-1100-3
7-11
Refrigeration System
Section 7
3. Extremely Thin at Evaporator Inlet
5. No Ice Formation
There is no ice, or a considerable lack of ice formation
on the intlet of the evaporator (tubing inlet). Examples:
The ice at the outlet of the evaporator reaches 1/8" to
initiate a harvest, but there is no ice formation at all on
the intlet of the evaporator.
The ice machine operates for an extended period, but
there is no ice formation at all on the evaporator.
Important
The Q1300 Q1600 and Q1800 model machines
have left and right expansion valves and separate
evaporator circuits. These circuits operate
independently from each other. Therefore, one may
operate properly while the other is malfunctioning.
Example: If the left expansion valve is starving, it
may not affect the ice formation pattern on the entire
right side of the evaporator.
OUTLET
ICE
OUTLET
OUTLET
INLET
INLET
SV1571
INLET
SV1575
Figure 7-9. Extremely Thin Ice Formation at
Evaporator Inlet
Figure 7-11. Q1300/Q1600/Q1800 Evaporator Tubing
4. Spotty Ice Formation
There are small sections on the evaporator where there
is no ice formation. This could be a single corner, or a
single spot in the middle of the evaporator. This is
generally caused by loss of heat transfer from the tubing
on the back side of the evaporator.
OUTLET
ICE
SV1577
INLET
Figure 7-10. Spotty Ice Formation
7-12
Part No. 80-1100-3
Section 7
Refrigeration System
SAFETY LIMITS
Control Board with Orange Label
General
When a safety limit condition is exceeded for 3
consecutive cycles the control board enters the limit into
memory and the ice machine continues to run. Use the
following procedures to determine if the control board
contains a safety limit indication.
In addition to standard safety controls, such as high
pressure cut-out, the control board has two built in safety
limit controls which protect the ice machine from major
component failures. There are two control boards with
different safety limit sequences. Original production
control boards have a black micro-processor. Current
production and replacement control boards have an
orange label on the control board microprocessor.
Safety Limit #1: If the freeze time reaches 60 minutes,
the control board automatically initiates a harvest cycle.
Control Board with black microprocessor
If 3 consecutive 60-minute freeze cycles occur, the ice
machine stops.
Control Board with orange label on microprocessor.
1. Move the toggle switch to OFF.
2. Move the toggle switch back to ICE.
3. Watch the harvest light. If a safety limit has been
recorded, the harvest light will flash one or two
times, corresponding to safety limit 1 or 2.
When a safety limit condition is exceeded (6 consecutive
cycles for Safety Limit #1 or 500 cycles for Safety Limit
#2) the ice machine stops and the harvest light on the
control board continually flashes on and off. Use the
following procedures to determine which safety limit has
stopped the machine.
If 6 consecutive 60-minute freeze cycles occur, the ice
machine stops.
1. Move the toggle switch to OFF.
Safety Limit #2: If the harvest time reaches 3.5
minutes, the control board automatically returns the ice
machine to the freeze cycle.
3. Watch the harvest light. It will flash one or two times,
corresponding to safety limit 1 or 2 to indicate which
safety limit stopped the ice machine.
Control Board with black microprocessor
If three consecutive 3.5 minute harvest cycles occur, the
ice machine stops.
2. Move the toggle switch back to ICE.
After safety limit indication, the ice machine will restart
and run until a safety limit is exceeded again.
Control Board with orange label on microprocessor.
If 500 consecutive 3.5 minute harvest cycles occur, the
ice machine stops.
Safety Limit Indication
Control Board with Black Microprocessor
When a safety limit condition is exceeded for 3
consecutive cycles the ice machine stops and the
harvest light on the control board continually flashes on
and off. Use the following procedures to determine
which safety limit has stopped the ice machine.
1. Move the toggle switch to OFF.
2. Move the toggle switch back to ICE.
After safety limit indication, the ice machine will restart
and run until a safety limit is exceeded again.
Part No. 80-1100-3
Orange Label
3. Watch the harvest light. It will flash one or two times,
corresponding to safety limits 1 and 2, to indicate
which safety limit stopped the ice machine.
7-13
Refrigeration System
Section 7
Analyzing Why Safety Limits May Stop the Ice
Machine
According to the refrigeration industry, a high percentage
of compressors fail as a result of external causes. These
can include: flooding or starving expansion valves, dirty
condensers, water loss to the ice machine, etc. The
safety limits protect the ice machine (primarily the
compressor) from external failures by stopping ice
machine operation before major component damage
occurs.
The safety limit system is similar to a high pressure cutout control. It stops the ice machine, but does not tell
what is wrong. The service technician must analyze the
system to determine what caused the high pressure cutout, or a particular safety limit, to stop the ice machine.
The safety limits are designed to stop the ice machine
prior to major component failures, most often a minor
problem or something external to the ice machine. This
may be difficult to diagnose, as many external problems
occur intermittently.
Example: An ice machine stops intermittently on safety
limit #1 (long freeze times). The problem could be a low
ambient temperature at night, a water pressure drop, the
water is turned off one night a week, etc.
When a high pressure cut-out or a safety limit stops the
ice machine, they are doing what they are supposed to
do. That is, stopping the ice machine before a major
component failure occurs.
Refrigeration and electrical component failures may also
trip a safety limit. Eliminate all electrical components and
external causes first. If it appears that the refrigeration
system is causing the problem, use Manitowoc’s
Refrigeration System Operational Analysis Table, along
with detailed charts, checklists, and other references to
determine the cause.
The following checklists are designed to assist the
service technician in analysis. However, because there
are many possible external problems, do not limit your
diagnosis to only the items listed.
7-14
Part No. 80-1100-3
Section 7
Refrigeration System
Safety Limit #1
Refer to page 7-13 for control board identification and safety limit operation.
Control Board with Black Microprocessor - Freeze Time exceeds 60 minutes for 3 consecutive freeze cycles
or
Control Board with Orange Label on Microprocessor - Freeze time exceeds 60 minutes for 6 consecutive freeze
cycles.
Possible Cause
Improper installation
Water system
Electrical system
Restricted condenser
air flow (air-cooled models)
Restricted condenser water flow (water-cooled models)
Refrigeration system
SAFETY LIMIT NOTES
•
Because there are many possible external problems,
do not limit your diagnosis to only the items listed in
this chart.
•
A continuous run of 100 harvests automatically
erases the safety limit code.
•
The control board will store and indicate only one
safety limit – the last one exceeded.
Part No. 80-1100-3
Check/Correct
See “Installation/Visual Inspection Checklist” on Page 7-10
Low water pressure (20 psi min.)
High water pressure (80 psi max.)
High water temperature (90°F/32.2°C max.)
Clogged water distribution tube
Dirty/defective water fill valve
Dirty/defective water dump valve
Defective water pump
Ice thickness probe out of adjustment
Harvest cycle not initiated electrically
Contactor not energizing
Compressor electrically non-operational
High inlet air temperature (110°F/43.3°C max.)
Condenser discharge air recirculation
Dirty condenser filter
Dirty condenser fins
Defective fan cycling control
Defective fan motor
Low water pressure (20 psi min.)
High water temperature (90°F/32.2°C max.)
Dirty condenser
Dirty/defective water regulating valve
Water regulating valve out of adjustment
Non-Manitowoc components
Improper refrigerant charge
Defective head pressure control (remotes)
Defective harvest valve
Defective compressor
TXV starving or flooding (check bulb mounting)
Non-condensables in refrigeration system
Plugged or restricted high side refrigerant lines or component
•
If the toggle switch is moved to the OFF position and
then back to the ICE position prior to reaching the
100-harvest point, the last safety limit exceeded will
be indicated.
•
If the harvest light did not flash prior to the ice
machine restarting, then the ice machine did not stop
because it exceeded a safety limit.
7-15
Refrigeration System
Section 7
Safety Limit #2
Refer to page 7-13 for control board identification and safety limit operation.
Control Board with Black Microprocessor - Harvest time exceeds 3.5 minutes for 3 consecutive harvest cycles.
or
Control Board with Orange Label on Microprocessor - Harvest time exceeds 3.5 minutes for 500 consecutive
harvest cycles.
Possible Cause
Improper installation
Water system
Electrical system
Refrigeration system
SAFETY LIMIT NOTES
•
Because there are many possible external problems,
do not limit your diagnosis to only the items listed in
this chart.
•
A continuous run of 100 harvests automatically
erases the safety limit code.
•
The control board will store and indicate only one
safety limit – the last one exceeded.
7-16
Check/Correct
See “Installation/Visual Inspection Checklist” on Page 7-10
Water area (evaporator) dirty
Dirty/defective water dump valve
Vent tube not installed on water outlet drain
Water freezing behind evaporator
Plastic extrusions and gaskets not securely mounted to the
evaporator
Low water pressure (20 psi min.)
Loss of water from sump area
Clogged water distribution tube
Dirty/defective water fill valve
Defective water pump
Ice thickness probe out of adjustment
Ice thickness probe dirty
Bin switch defective
Premature harvest
Non-Manitowoc components
Water regulating valve dirty/defective
Improper refrigerant charge
Defective head pressure control valve (remotes)
Defective harvest pressure control (HPR) valve (remotes)
Defective harvest valve
TXV flooding (check bulb mounting)
Defective fan cycling control
•
If the toggle switch is moved to the OFF position and
then back to the ICE position prior to reaching the
100-harvest point, the last safety limit exceeded will
be indicated.
•
If the harvest light did not flash prior to the ice
machine restarting, then the ice machine did not stop
because it exceeded a safety limit.
Part No. 80-1100-3
Section 7
Refrigeration System
3. Perform an actual discharge pressure check.
ANALYZING DISCHARGE PRESSURE
DURING FREEZE OR HARVEST CYCLE
Procedure
1. Determine the ice machine operating conditions:
Air temp. entering condenser
Air temp. around ice machine
Water temp. entering sump trough
______
______
______
2. Refer to Operating Pressure Chart for ice machine
being checked. (These charts begin on Page 7-33.)
Use the operating conditions determined in step 1 to
find the published normal discharge pressures.
Freeze Cycle _______
Beginning of Cycle
Middle of Cycle
End of Cycle
Freeze
Cycle PSIG
__________
__________
__________
Harvest
Cycle PSIG
__________
__________
__________
4. Compare the actual discharge pressure (step 3) with
the published discharge pressure (step 2).
The discharge pressure is normal when the actual
pressure falls within the published pressure range for the
ice machine’s operating conditions.
Harvest Cycle_______
Freeze Cycle Discharge Pressure High Checklist
Possible Cause
Improper installation
Restricted condenser air flow (air-cooled models)
Restricted condenser water flow (water-cooled
models)
Improper refrigerant charge
Other
Check/Correct
See “Installation/Visual Inspection Checklist” on Page 7-10
High inlet air temperature (110°F/43.3°C max.)
Condenser discharge air recirculation
Dirty condenser filter
Dirty condenser fins
Defective fan cycling control
Defective fan motor
Low water pressure (20 psi min.)
High inlet water temperature (90°F/32.2°C max.)
Dirty condenser
Dirty/defective water regulating valve
Water regulating valve out of adjustment
Overcharged
Non-condensables in system
Wrong type of refrigerant
Non-Manitowoc components in system
High side refrigerant lines/component restricted (before mid-condenser)
Defective head pressure control valve (remote models)
Freeze Cycle Discharge Pressure Low Checklist
Possible Cause
Improper installation
Improper refrigerant charge
Water regulating valve (water-cooled condensers)
Other
Check/Correct
See “Installation/Visual Inspection Checklist” on Page 7-10
Undercharged
Wrong type of refrigerant
Out of adjustment
Defective
Non-Manitowoc components in system
Defective head pressure control valve (remote models)
Defective fan cycle control
NOTE: Do not limit your diagnosis to only the items listed in the checklists.
Part No. 80-1100-3
7-17
Refrigeration System
Section 7
NOTE: Analyze discharge pressure before analyzing
suction pressure. High or low discharge pressure may
be causing high or low suction pressure.
ANALYZING SUCTION PRESSURE
DURING FREEZE CYCLE
The suction pressure gradually drops throughout the
freeze cycle. The actual suction pressure (and drop rate)
changes as the air and water temperatures entering the
ice machine change. This affects freeze cycle times.
To analyze and identify the proper suction pressure drop
throughout the freeze cycle, compare the published
suction pressure to the published freeze cycle time.
“Operating Pressure” and “Freeze Cycle Time” charts
can be found later in this section.
Procedure
Step
1. Determine the ice machine operating
conditions.
2A. Refer to “Cycle Time” and “Operating
Pressure” charts for ice machine model being
checked. Using operating conditions from Step
1, determine published freeze cycle time and
published freeze cycle suction pressure.
Example Using QY0454A Model Ice Machine
Air temp. entering condenser:
90°F/32.2°C
Air temp. around ice machine:
80°F/26.7°C
Water temp. entering water fill valve:
70°F/21.1°C
Published freeze cycle time:
13.7 - 14.1 minutes
Published freeze cycle suction pressure:
55-36 PSIG
Published Freeze Cycle Time (minutes)
1
3
5
7
9
12 14
2B. Compare the published freeze cycle time
and published freeze cycle suction pressure.
Develop a chart.
55 52
48
44
41
38
36
Published Freeze Cycle Suction Pressure (psig)
3. Perform an actual suction pressure check at
the beginning, middle and end of the freeze
cycle. Note the times at which the readings are
taken.
4. Compare the actual freeze cycle suction
pressure (Step 3) to the published freeze cycle
time and pressure comparison (Step 2B).
Determine if the suction pressure is high, low
or acceptable.
7-18
Beginning of freeze cycle:
Middle of freeze cycle:
End of freeze cycle:
Time Into
Freeze Cycle
1 minutes
7 minutes
14 minutes
Published
Pressure
55 PSIG
44 PSIG
36 PSIG
59 PSIG at 1 minute
48 PSIG at 7 minutes
40 PSIG at 14 minutes
Actual
Pressure
59 PSIG
48 PSIG
40 PSIG
Result
High
High
High
Part No. 80-1100-3
Section 7
Refrigeration System
Freeze Cycle Suction Pressure High Checklist
Possible Cause
Improper installation
Discharge pressure
Improper refrigerant charge
Other
Check/Correct
See “Installation/Visual Inspection Checklist” on Page 7-10
Discharge pressure is too high, and is affecting low side
(See “Freeze Cycle Discharge Pressure High Checklist” on Page 7-16)
Overcharged
Wrong type of refrigerant
Non-Manitowoc components in system
H.P.R. solenoid leaking
harvest valve stuck open
TXV flooding (check bulb mounting)
Defective compressor
Freeze Cycle Suction Pressure Low Checklist
Possible Cause
Improper installation
Discharge pressure
Improper refrigerant charge
Other
Check/Correct
See “Installation/Visual Inspection Checklist” on Page 7-10
Discharge pressure is too low, and is affecting low side
(See “Freeze Cycle Discharge Pressure Low Checklist” on Page 7-16)
Undercharged
Wrong type of refrigerant
Non-Manitowoc components in system
Improper water supply over evaporator (See “Water System Checklist” on page 7-10)
Loss of heat transfer from tubing on back side of evaporator
Restricted/plugged liquid line drier
Restricted/plugged tubing in suction side of refrigeration system
TXV starving
NOTE: Do not limit your diagnosis to only the items
listed in the checklists.
Part No. 80-1100-3
7-19
Refrigeration System
SINGLE EXPANSION VALVE ICE MACHINES COMPARING EVAPORATOR INLET AND
OUTLET TEMPERATURES
NOTE: This procedure will not work on the dual
expansion valve Q1300 Q1600 and Q1800 ice
machines.
The temperatures of the suction lines entering and
leaving the evaporator alone cannot diagnose an ice
machine. However, comparing these temperatures
during the freeze cycle, along with using Manitowoc’s
Refrigeration System Operational Analysis Table, can
help diagnose an ice machine malfunction.
The actual temperatures entering and leaving the
evaporator vary by model, and change throughout the
freeze cycle. This makes documenting the “normal” inlet
and outlet temperature readings difficult. The key to the
diagnosis lies in the difference between the two
temperatures five minutes into the freeze cycle. These
temperatures must be within 7° of each other.
Section 7
Use this procedure to document freeze cycle inlet and
outlet temperatures.
1. Use a quality temperature meter, capable of taking
temperature readings on curved copper lines.
2. Attach the temperature meter sensing device to the
copper lines entering and leaving the evaporator.
Important
Do not simply insert the sensing device under the
insulation. It must be attached to and reading the
actual temperature of the copper line.
3. Wait five minutes into the freeze cycle.
4. Record the temperatures below and determine the
difference between them.
5. Use this with other information gathered on the
Refrigeration System Operational Analysis Table to
determine the ice machine malfunction.
______________
______________
Inlet Temperature
Outlet Temperature
_______________
Difference
Must be within 7° at 5
minutes into freeze cycle
7-20
Part No. 80-1100-3
Section 7
Refrigeration System
HARVEST VALVE TEMPERATURE CHECK
NOTE: This procedure requires checking both harvest
valves on dual expansion valve Q1300 and Q1800 ice
machines.
General
A harvest valve requires a critical orifice size. This
meters the amount of hot gas flowing into the evaporator
during the harvest cycle. If the orifice is even slightly too
large or too small, long harvest cycles will result.
A too-large orifice causes refrigerant to condense to
liquid in the evaporator during the harvest cycle. This
liquid will cause compressor damage. A too-small orifice
does not allow enough hot gas into the evaporator. This
causes low suction pressure, and insufficient heat for a
harvest cycle.
Refer to the Parts Manual for proper valve application. If
replacement is necessary, Use only “original” Manitowoc
replacement parts.
Harvest Valve Analysis
Symptoms of a harvest valve remaining partially open
during the freeze cycle can be similar to symptoms of
either an expansion valve or compressor problem. The
best way to diagnose a harvest valve is by using
Manitowoc’s Ice Machine Refrigeration System
Operational Analysis Table.
Use the following procedure and table to help determine
if a harvest valve is remaining partially open during the
freeze cycle.
1. Wait five minutes into the freeze cycle.
3. Feel the compressor discharge line.
! Warning
The inlet of the harvest valve and the compressor
discharge line could be hot enough to burn your
hand. Just touch them momentarily.
4. Compare the temperature of the inlet of the harvest
valves to the temperature of the compressor
discharge line.
Findings
The inlet of the
harvest valve is cool
enough to touch and
the compressor
discharge line is hot.
Comments
This is normal as the discharge line
should always be too hot to touch and
the harvestharvest valve inlet,
although too hot to touch during
harvest, should be cool enough to
touch after 5 minutes into the freeze
cycle.
The inlet of the
This is an indication something is
harvest valve is hot wrong, as the harvest valve inlet did
and approaches the not cool down during the freeze cycle.
temperature of a hot If the compressor dome is also entirely
compressor
hot, the problem is not a harvest valve
discharge line.
leaking, but rather something causing
the compressor (and the entire ice
machine) to get hot.
Both the inlet of the This is an indication something is
harvest valve and
wrong, causing the compressor
the compressor
discharge line to be cool to the touch.
discharge line are
This is not caused by a harvest valve
cool enough to
leaking.
touch.
2. Feel the inlet of the harvest valve(s).
Important
Feeling the harvest valve outlet or across the
harvest valve itself will not work for this comparison.
The harvest valve outlet is on the suction side (cool
refrigerant). It may be cool enough to touch even if
the valve is leaking.
Part No. 80-1100-3
7-21
Refrigeration System
Section 7
DISCHARGE LINE TEMPERATURE ANALYSIS
Procedure
General
Connect a temperature probe on the compressor
discharge line with-in 6" of the compressor and insulate.
Knowing if the discharge line temperature is increasing,
decreasing or remaining constant can be an important
diagnostic tool. Maximum compressor discharge line
temperature on a normally operating ice machine
steadily increases throughout the freeze cycle.
Comparing the temperatures over several cycles will
result in a consistent maximum discharge line
temperature.
Ambient air temperatures affect the maximum discharge
line temperature.
Higher ambient air temperatures at the condenser =
higher discharge line temperatures at the compressor.
Lower ambient air temperatures at the condenser =
lower discharge line temperatures at the compressor.
Regardless of ambient temperature, the freeze cycle
discharge line temperature will be higher than 160°F
(71.1°C) on a normally operating ice machine.
Observe the discharge line temperature for the last three
minutes of the freeze cycle and record the maximum
discharge line temperature.
Discharge Line Temperature Above 160°F (71.1°C) At
End Of Freeze Cycle:
Ice machines that are operating normally will have
consistent maximum discharge line temperatures above
160°F (71.1°C).
Discharge Line Temperature Below 160°F (71.1°C) At
End Of Freeze Cycle
Ice machines that have a flooding expansion valve will
have a maximum discharge line temperature that
decreases each cycle.
Verify the expansion valve sensing bulb is 100%
insulated and sealed airtight. Condenser air contacting
an incorrectly insulated sensing bulb will cause
overfeeding of the expansion valve.
Verify the expansion valve sensing bulb is positioned
and secured correctly.
7-22
Part No. 80-1100-3
Section 7
Refrigeration System
THIS PAGE INTENTIONALLY LEFT BLANK
Part No. 80-1100-3
7-23
Refrigeration System
HOW TO USE THE REFRIGERATION SYSTEM
OPERATIONAL ANALYSIS TABLES
General
These tables must be used with charts, checklists and
other references to eliminate refrigeration components
not listed on the tables and external items and problems
which can cause good refrigeration components to
appear defective.
The tables list five different defects that may affect the
ice machine’s operation.
NOTE: A low-on-charge ice machine and a starving
expansion valve have very similar characteristics and
are listed under the same column.
NOTE: Before starting, see “Before Beginning Service”
on Page 7-9 for a few questions to ask when talking to
the ice machine owner.
Procedure
Step 1 Complete the “Operation Analysis” column.
Read down the left “Operational Analysis” column.
Perform all procedures and check all information listed.
Each item in this column has supporting reference
material to help analyze each step.
While analyzing each item separately, you may find an
“external problem” causing a good refrigerant
component to appear bad. Correct problems as they are
found. If the operational problem is found, it is not
necessary to complete the remaining procedures.
Step 2 Enter check marks (√) in the small boxes.
Each time the actual findings of an item in the
“Operational Analysis” column matches the published
findings on the table, enter a check mark.
Example: Freeze cycle suction pressure is determined
to be low. Enter a check mark in the “low” box.
Step 3 Add the check marks listed under each of the
four columns. Note the column number with the highest
total and proceed to “Final Analysis.”
NOTE: If two columns have matching high numbers, a
procedure was not performed properly and/or supporting
material was not analyzed correctly.
7-24
Section 7
Final Analysis
The column with the highest number of check marks
identifies the refrigeration problem.
COLUMN 1 - HARVEST VALVE LEAKING
A leaking harvest valve must be replaced.
COLUMN 2 - LOW CHARGE/TXV STARVING
Normally, a starving expansion valve only affects the
freeze cycle pressures, not the harvest cycle pressures.
A low refrigerant charge normally affects both pressures.
Verify the ice machine is not low on charge before
replacing an expansion valve.
1. Add refrigerant charge in 2 to 4 oz. increments as a
diagnostic procedure to verify a low charge. If the
problem is corrected, the ice machine is low on
charge. Find the refrigerant leak.
The ice machine must operate with the nameplate
charge. If the leak cannot be found, proper
refrigerant procedures must still be followed Change
the liquid line drier. Then, evacuate and weigh in the
proper charge.
2. If the problem is not corrected by adding charge, the
expansion valve is faulty.
On dual expansion valve ice machines, change only
the TXV that is starving. If both TXV’s are starving,
they are probably good, and are being affected by
some other malfunction, such as low charge.
COLUMN 3 - TXV FLOODING
A loose or improperly mounted expansion valve bulb
causes the expansion valve to flood. Check bulb
mounting, insulation, etc., before changing the valve. On
dual expansion valve machines, the service technician
should be able to tell which TXV is flooding by analyzing
ice formation patterns. Change only the flooding
expansion valve.
COLUMN 4 - COMPRESSOR
Replace the compressor and start components. To
receive warranty credit, the compressor ports must be
properly sealed by crimping and soldering them closed.
Old start components must be returned with the faulty
compressor.
Part No. 80-1100-3
Section 7
Refrigeration System
REFRIGERATION SYSTEM OPERATIONAL ANALYSIS TABLES
Q, J and B Model Single Expansion Valve
This table must be used with charts, checklists and other references to eliminate
refrigeration components not listed on the table and external items and problems,
which can cause good refrigeration components to appear defective.
Operational Analysis
Ice Production
Installation and Water
System
Ice Formation Pattern
Safety Limits
Refer to “Analyzing Safety
Limits” to eliminate all nonrefrigeration problems.
Freeze Cycle
Discharge Pressure
_____
______
______
1 minute Middle
End
into cycle
Freeze Cycle
Suction Pressure
_____
______
______
1 minute Middle
End
Wait 5 minutes into the freeze
cycle.
Compare temperatures of
evaporator inlet and
evaporator outlet.
Inlet
____ ° F (° C)
Outlet
____ ° F (° C)
Difference ____ ° F (° C)
Wait 5 minutes into the freeze
cycle.
Compare temperatures of
compressor discharge line
and harvest valve inlet.
Discharge Line Temperature
Record freeze cycle discharge
line temperature at the end of
the freeze cycle
1
2
3
4
Air-Temperature Entering Condenser_____________
Water Temperature Entering Ice Machine_________
Published 24 hour ice production________________
Calculated (actual) ice production_______________
NOTE: The ice machine is operating properly if the ice fill patterns is normal and ice production is within 10% of charted
capacity.
All installation and water related problems must be corrected before proceeding with chart.
Ice formation is extremely
thin on outlet of evaporator
-orNo ice formation on the
entire evaporator
Ice formation is extremely
thin on outlet of evaporator
-orNo ice formation on entire
evaporator
Ice formation normal
-orIce formation is extremely
thin on inlet of evaporator
-orNo ice formation on entire
evaporator
Ice formation normal
-orNo ice formation on entire
evaporator
Stops on safety limit:
1
Stops on safety limit:
1
Stops on safety limit:
1 or 2
Stops on safety limit:
1
If discharge pressure is High or Low refer to freeze cycle high or low discharge pressure problem checklist to eliminate
problems and/or components not listed on this table before proceeding.
If suction pressure is High or Low refer to freeze cycle high or low suction pressure problem checklist to eliminate problems
and/or components not listed on this table before proceeding.
Suction pressure is High
Suction pressure is Low or
Normal
Suction pressure is High
Suction pressure is High
Inlet and outlet
within 7°
of each other
Inlet and outlet
not within 7°
of each other
-andInlet is colder than outlet
Inlet and outlet
within 7°
of each other
-orInlet and outlet
not within 7°
of each other
-andInlet is warmer than outlet
Inlet and outlet
within 7°
of each other
The harvest valve inlet is
Hot
-andapproaches the temperature
of a Hot compressor
discharge line.
The harvest valve inlet is
Cool enough to hold hand
on
-andthe compressor discharge
line is Hot.
The harvest valve inlet is
Cool enough to hold hand
on
-andthe compressor discharge
line is Cool
enough to hold hand on.
The harvest valve inlet is
Cool enough to hold hand
on
-andthe compressor discharge
line is Hot.
Discharge line temperature
160°F (71.1°C)
or higher
at the end of the freeze
cycle
Discharge line temperature
160°F (71.1°C)
or higher
at the end of the freeze
cycle
Discharge line temperature
less than
160°F (71.1°C)
at the end of the freeze
cycle
Discharge line temperature
160°F (71.1°C)
or higher at the end of the
freeze cycle
Harvest Valve Leaking
Low On Charge
-OrTXV Starving
TXV Flooding
Compressor
_________°F (°C)
Final Analysis
Enter total number of boxes
checked in each column.
Part No. 80-1100-3
7-25
Refrigeration System
Section 7
Q and J Model Dual Expansion Valve
This table must be used with charts, checklists and other references to eliminate
refrigeration components not listed on the table and external items and problems,
which can cause good refrigeration components to appear defective.
Operational Analysis
Ice Production
Ice Formation Pattern
Left side _____________
___________________
Right side ___________
___________________
1
2
3
4
Air-Temperature Entering Condenser____________
Water Temperature Entering Ice Machine_________
Published 24 hour ice production________________
Calculated (actual) ice production________________
NOTE: The ice machine is operating properly if the ice production
and ice formation pattern is normal and ice production is within 10% of charted capacity.
Ice formation is
Ice formation is
Ice formation normal
Ice formation normal
extremely thin on
extremely thin on
-or-oroutet of one side of
outlet of one or both
Ice formation is
No ice formation on
evaporator
sides of evaporator
extremely thin on inlet
entire evaporator
-or-orof one side of
No ice formation on
No ice formation on
evaporator
one side of
entire evaporator
-orevaporator
No ice formation on
entire evaporator
Stops on safety limit:
Stops on safety limit:
Stops on safety limit:
Stops on safety limit:
1
1
1 or 2
1
Safety limits
Refer to “Analyzing Safety
Limits” to eliminate problems
and/or components not listed
on this table
Freeze Cycle
If discharge pressure is High or Low refer to a freeze cycle high or low discharge pressure
DISCHARGE pressure
problem checklist to eliminate problems and/or components not listed on this table before
_____
______
______
proceeding.
1 minute Middle
End
into cycle
Freeze Cycle
If suction pressure is High or Low refer to a freeze cycle high or low suction pressure problem
SUCTION pressure
checklist to eliminate problems and/or components not listed on this table before proceeding.
_____
______
______
Suction pressure is
Suction pressure is
Suction pressure is
Suction pressure is
Beginning Middle
End
High
Low or Normal
High
High
Harvest Valve
One harvest valve
Both harvest valve
Both harvest valve
Both harvest valve
Wait 5 minutes into the freeze
inlet is Hot
inlets are
inlets are Cool
inlets are Cool
cycle.
-andCool enough
enough
enough
Compare temperatures of
approaches the
to hold hand on
to hold hand on
to hold hand on
compressor discharge line
temperature of a Hot
-and-and-andand both harvest valve inlets.
compressor
the compressor
the compressor
the compressor
discharge line.
discharge line is Hot.
discharge line is
discharge line is Hot.
Cool enough
to hold hand on.
Discharge Line Temperature
Discharge line
Discharge line
Discharge line
Discharge line
Record freeze cycle discharge
temperature
temperature
temperature
temperature
line temperature at the end of
160°F (71.1°C)
160°F (71.1°C)
less than
160°F (71.1°C)
the freeze cycle
160°F (71.1°C)
or higher
or higher
or higher
at
the
end
of
the
at
the
end of the
at the end of the
at the end of the
freeze cycle
freeze cycle
_________°F (°C)
freeze cycle
freeze cycle
Final Analysis
Enter total number of boxes
checked in each column.
7-26
Harvest Valve
Leaking
Low On Charge
-OrTXV Starving
TXV Flooding
Compressor
Part No. 80-1100-3
Section 7
Refrigeration System
Figure 7-13. H.P.R. Valve
HARVEST PRESSURE REGULATING
(H.P.R.) SYSTEM
Remotes Only
GENERAL
The harvest pressure regulating (H.P.R.) system
includes:
•
Harvest pressure regulating solenoid valve (H.P.R.
solenoid). This is an electrically operated valve which
opens when energized, and closes when deenergized.
INLET
OUTLET
FLOW
SV1427
Figure 7-12. H.P.R. Solenoid
•
Harvest pressure regulating valve (H.P.R. valve).
This is a non-adjustable pressure regulating valve
which modulates open and closed, based on the
refrigerant pressure at the outlet of the valve. The
valve closes completely and stops refrigerant flow
when the pressure at the outlet rises above the valve
setting.
INLET
SV3053
OUTLET
Part No. 80-1100-3
7-27
Refrigeration System
Section 7
FREEZE CYCLE
The H.P.R. system is not used during the freeze cycle.
The H.P.R. solenoid is closed (de-energized), preventing
refrigerant flow into the H.P.R. valve.
HARVEST CYCLE
During the harvest cycle, the check valve in the
discharge line prevents refrigerant in the remote
condenser and receiver from backfeeding into the
evaporator and condensing to liquid.
The H.P.R. solenoid is opened (energized) during the
harvest cycle, allowing refrigerant gas from the top of the
receiver to flow into the H.P.R. valve. The H.P.R. valve
modulates open and closed, raising the suction pressure
high enough to sustain heat for the harvest cycle,
without allowing refrigerant to condense to liquid in the
evaporator.
In general, harvest cycle suction pressure rises, then
stabilizes in the range of 75-100 psig (517-758 kPA).
Exact pressures vary from model to model. These can
be found in the “Operational Refrigerant Pressures”
charts, beginning on Page 7-32.
7-28
Part No. 80-1100-3
Section 7
HPR DIAGNOSTICS
Steps 1 through 4 can be quickly verified without
attaching a manifold gauge set or thermometer.
All questions must have a yes answer to continue
the diagnostic procedure.
1. Liquid line warm?
(Body temperature is normal)
If liquid line is warmer or cooler than body
temperature, refer to headmaster diagnostics.
2. Ice fill pattern normal?
Refer to “Ice Formation Pattern” if ice fill is not
normal.
3. Freeze time normal?
(Refer to Cycle Times/Refrigerant Pressures/24
Hour Ice Production Charts)
Refrigeration System
6. Freeze cycle Head Pressure 220 psig or higher?
If the head pressure is lower than 220 psig refer to
headmaster diagnostics.
7. Freeze cycle Suction Pressure normal?
Refer to analyzing suction pressure if suction
pressure is high or low.
8. Discharge line temperature is 160°F (71.1°C) or
higher at end of freeze cycle?
If less than 160°F (71.1°C) check expansion valve
bulb mounting and insulation.
9. Harvest cycle suction and discharge pressures are
lower than indicated in the cycle times/refrigerant
pressures/24 hour ice production chart?
Replace Harvest Pressure Regulating system (HPR
Valve and HPR solenoid valve).
Shorter freeze cycles - Refer to headmaster
diagnostics.
Longer freeze cycles - Refer to water system
checklist, then refer to Refrigeration Diagnostic
Procedures.
4. Harvest time is longer than normal and control board
indicates safety limit #2?
(Refer to Cycle Times/Refrigerant Pressures/24
Hour Ice Production Charts)
Connect refrigeration manifold gauge set to the
access valves on the front of the ice machine, and a
thermometer thermocouple on the discharge line
within 6" of the compressor (insulate thermocouple).
5. Establish baseline by recording suction and
discharge pressure, discharge line temperature and
freeze & harvest cycle times. (Refer to section 7
“Operational Analysis” for data collection detail).
Part No. 80-1100-3
7-29
Refrigeration System
Section 7
Diagnosing
HEADMASTER CONTROL VALVE
Manitowoc remote systems require headmaster control
valves with special settings. Replace defective
headmaster control valves only with “original” Manitowoc
replacement parts.
Operation
The R404A headmaster control valve is non adjustable.
At ambient temperatures of approximately 70°F (21.1°C)
or above, refrigerant flows through the valve from the
condenser to the receiver inlet. At temperatures below
this (or at higher temperatures if it is raining), the head
pressure control dome’s nitrogen charge closes the
condenser port and opens the bypass port from the
compressor discharge line.
In this modulating mode, the valve maintains minimum
head pressure by building up liquid in the condenser and
bypassing discharge gas directly to the receiver.
1. Determine the air temperature entering the remote
condenser.
2. Determine if the head pressure is high or low in
relationship to the outside temperature. (Refer to the
proper “Operational Pressure Chart” later in this
section.) If the air temperature is below 70°F
(21.1°C), the head pressure should be modulating
about 225 PSIG.
3. Determine the temperature of the liquid line entering
the receiver by feeling it. This line is normally warm;
“body temperature.”
4. Using the information gathered, refer to the chart
below.
NOTE: A headmaster that will not bypass, will function
properly with condenser air temperatures of
approximately 70°F (21.1°C) or above. When the
temperature drops below 70°F (21.1°C), the headmaster
fails to bypass and the ice machine malfunctions. Lower
ambient conditions can be simulated by rinsing the
condenser with cool water during the freeze cycle.
Symptom
Valve not maintaining pressures
Probable Cause
Non-approved valve
Discharge pressure extremely high;
Liquid line entering receiver feels hot
Discharge pressure low; Liquid line
entering receiver feels extremely cold
Discharge pressure low; Liquid line
entering receiver feels warm to hot
Valve stuck in bypass
Corrective Measure
Install a Manitowoc Headmaster control
valve with proper setting
Replace valve
Valve not bypassing
Replace valve
Ice machine low on charge
See “Low on Charge Verification” on
7-30
Page 7-31
Part No. 80-1100-3
Section 7
Refrigeration System
LOW ON CHARGE VERIFICATION
FAN CYCLE CONTROL VS. HEADMASTER
The remote ice machine requires more refrigerant
charge at lower ambient temperatures than at higher
temperatures. A low on charge ice machine may
function properly during the day, and then malfunction at
night. Check this possibility.
A fan cycle control cannot be used in place of a
headmaster. The fan cycle control is not capable of
bypassing the condenser coil and keeping the liquid line
temperature and pressure up.
If you cannot verify that the ice machine is low on
charge:
1. Add refrigerant in 2 lb. increments, but do not
exceed 6 lbs.
2. If the ice machine was low on charge, the
headmaster function and discharge pressure will
return to normal after the charge is added. Do not let
the ice machine continue to run. To assure operation
in all ambient conditions, the refrigerant leak must
be found and repaired, the liquid line drier must be
changed, and the ice machine must be evacuated
and properly recharged.
This is very apparent when it rains or the outside
temperature drops. When it rains or the outside
temperature drops, the fan begins to cycle on and off. At
first, everything appears normal. But, as it continues
raining or getting colder, the fan cycle control can only
turn the fan off. All the refrigerant must continue to flow
through the condenser coil, being cooled by the rain or
low outside temperature.
This causes excessive sub-cooling of the refrigerant. As
a result, the liquid line temperature and pressure are not
maintained for proper operation.
3. If the ice machine does not start to operate properly
after adding charge, replace the headmaster.
Part No. 80-1100-3
7-31
Refrigeration System
Section 7
Pressure Control Specifications and
Diagnostics
FAN CYCLE CONTROL
HIGH PRESSURE CUT-OUT (HPCO) CONTROL
Function
Stops the ice machine if subjected to excessive highside pressure.
(Self-Contained Air-Cooled Models Only)
Function
Cycles the fan motor on and off to maintain proper
operating discharge pressure.
The fan cycle control closes on an increase, and opens
on a decrease in discharge pressure.
Specifications
The HPCO control is normally closed, and opens on a
rise in discharge pressure.
Specifications
Cut-out:
450 psig ±10
Cut-in:
Manual or automatic reset
(Must be below 300 psig to reset).
Check Procedure
Model
Q200/Q280
Q320/Q370/Q420
Q450/Q600
Q800/Q1000
Q1300/ Q1800
Cut-In (Close)
Cut-Out (Open)
250 psig ±5
200 psig ±5
275 psig ±5
225 psig ±5
1. Set ICE/OFF/CLEAN switch to OFF, (Manual reset
HPCO reset if tripped).
2. Connect manifold gauges.
3. Hook voltmeter in parallel across the HPCO, leaving
wires attached.
1. Verify fan motor windings are not open or grounded,
and fan spins freely.
4. On water-cooled models, close the water service
valve to the water condenser inlet. On self-contained
air-cooled and remote models, disconnect the fan
motor.
2. Connect manifold gauges to ice machine.
5. Set ICE/OFF/CLEAN switch to ICE.
3. Hook voltmeter in parallel across the fan cycle
control, leaving wires attached.
6. No water or air flowing through the condenser will
cause the HPCO control to open because of
excessive pressure. Watch the pressure gauge and
record the cut-out pressure.
Check Procedure
4. Refer to chart below.
At:
above cut-in
below cut-out
Reading Should Be:
0 volts
line voltage
Fan Should Be:
running
off
! Warning
If discharge pressure exceeds 460 psig and the
HPCO control does not cut out, set ICE/OFF/
CLEAN switch to OFF to stop ice machine
operation.
Replace the HPCO control if it:
7-32
•
Will not reset (below 300 psig)
•
Does not open at the specified cut-out point
Part No. 80-1100-3
Section 7
Refrigeration System
Cycle Time/24 Hour Ice Production/
Refrigerant Pressure Charts
Q200 SERIES
Q200 SERIES
NOTE: These characteristics may vary depending on
operating conditions.
Self-Contained Water-Cooled
Self-Contained Air-Cooled
NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Freeze Time + Harvest Time = Total Cycle Time
Cycle Times
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
11.5-13.5
13.8-16.1
16.1-18.7
19.8-23.0
13.8-16.1
15.6-18.2
18.6-21.6
23.6-27.4
15.2-17.8
17.0-19.8
20.5-23.8
25.5-29.6
Harvest
Time
1.0-2.5
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
11.5-13.5
12.0-14.1
12.6-14.7
13.1-15.4
12.8-15.0
13.5-15.7
14.1-16.5
14.8-17.3
14.5-16.9
15.2-17.8
16.1-18.7
17.0-19.8
Harvest
Time
1-2.5
Times in minutes
24 Hour Ice Production
Times in minutes
24 Hour Ice Production
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Air Temp.
Around Ice
Machine
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
270
230
200
165
230
205
175
140
210
190
160
130
Air Temp.
Around Ice
Machine
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Freeze Cycle
Harvest Cycle
Air Temp.
Entering Discharge Suction Discharge Suction
Condenser Pressure Pressure Pressure Pressure
°F/°C
PSIG
PSIG
PSIG
PSIG
195-260
60-28
120-190
85-110
50/10.0
70/21.1
195-260
60-28
120-190
85-110
80/26.7
210-270
65-28
160-190
90-110
90/32.2
240-290
70-30
190-210
100-120
100/37.8
270-330
70-35
220-240
120-140
110/43.3
310-390
85-40
250-270
120-150
Suction pressure drops gradually throughout the freeze cycle
50/10.0
70/21.1
90/32.2
270
260
250
240
245
235
225
215
220
210
200
190
Based on average ice slab weight of 2.44 - 2.81 lb
Regular cube derate is 7%
Based on average ice slab weight of 2.44 - 2.81 lb
Regular cube derate is 7%
Operating Pressures
Water Temperature °F/°C
Condenser
Water
Consumption
Gal/24 hours
90/32.2 Air Temperature
Around Ice Machine
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
240
480
2100
Water regulating valve set to maintain 230 PSIG discharge pressure
Operating Pressures
Freeze Cycle
Harvest Cycle
Air Temp.
Around Ice Discharge Suction Discharge Suction
Machine
Pressure Pressure Pressure Pressure
°F/°C
PSIG
PSIG
PSIG
PSIG
225-235
60-28
170-200
90-110
50/10.0
70/21.1
225-235
60-28
170-200
90-110
80/26.7
225-240
60-28
175-205
90-110
90/32.2
225-245
65-30
175-205
90-115
100/37.8
225-250
70-32
180-210
90-115
110/43.3
225-260
75-34
185-215
90-120
Suction pressure drops gradually throughout the freeze cycle
Part No. 80-1100-3
7-33
Refrigeration System
Section 7
Q280 SERIES
Q280 SERIES
Self-Contained Air-Cooled
Self-Contained Water-Cooled
NOTE: These characteristics may vary depending on
operating conditions.
NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Cycle Times
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
10.6-12.5
11.5-13.5
12.6-14.7
14.5-16.9
11.8-13.8
12.8-15.0
14.1-16.5
16.5-19.3
12.6-14.7
13.8-16.1
15.2-17.8
18.0-21.0
Harvest
Time
1.0-2.5
Times in minutes
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
10.6-12.5
10.8-12.7
11.0-13.0
11.3-13.2
12.0-14.1
12.3-14.4
12.6-14.7
12.8-15.0
12.3-14.4
13.8-16.1
14.1-16.5
14.5-16.9
Harvest
Time
1-2.5
Times in minutes
24 Hour Ice Production
24 Hour Ice Production
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Air Temp.
Around Ice
Machine
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
290
270
250
220
265
245
225
195
250
230
210
180
Based on average ice slab weight of 2.44 - 2.81 lb
Regular cube derate is 7%
Operating Pressures
Freeze Cycle
Air Temp.
Discharg
Entering
Suction
e
Condenser
Pressure
Pressure
°F/°C
PSIG
PSIG
50/10.0
195-250
60-20
70/21.1
195-250
60-20
80/26.7
220-280
60-26
90/32.2
250-310
66-30
100/37.8
280-350
70-32
110/43.3
310-390
85-40
Harvest Cycle
Discharg
Suction
e
Pressure
Pressure
PSIG
PSIG
150-190
70-90
150-190
70-90
180-220
70-90
190-220
80-100
220-250
80-110
250-270
80-120
Suction pressure drops gradually throughout the freeze cycle
Air Temp.
Around Ice
Machine
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
290
285
280
275
260
255
250
245
255
230
225
220
Based on average ice slab weight of 2.44 - 2.81 lb
Regular cube derate is 7%
Condenser
Water
Consumption
Gal/24 hours
90/32.2 Air Temperature
Around Ice Machine
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
250
490
3400
Water regulating valve set to maintain 230 PSIG discharge pressure
Operating Pressures
Air Temp.
Freeze Cycle
Harvest Cycle
Around
Discharge Suction Discharge Suction
Ice
Pressure Pressure Pressure Pressure
Machine
PSIG
PSIG
PSIG
PSIG
°F/°C
225-235
60-28
190-200
75-90
50/10.0
70/21.1
225-235
60-28
190-200
80-90
80/26.7
225-240
60-28
190-200
80-90
90/32.2
225-245
62-28
190-200
80-90
100/37.8
225-250
62-30
190-200
80-90
110/43.3
225-260
64-32
195-205
80-95
Suction pressure drops gradually throughout the freeze cycle
7-34
Part No. 80-1100-3
Section 7
Refrigeration System
Q320 SERIES
Q320 SERIES
Self-Contained Air-Cooled
Self-Contained Water-Cooled
NOTE: These characteristics may vary depending on
operating conditions.
NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Cycle Times
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
12.2-13.9
13.6-15.5
16.1-18.4
19.7-22.3
13.1-14.9
14.8-16.817.7-20.2
22.0-25.0
14.2-16.2
16.1-18.4
19.7-22.3
25.0-28.3
Harvest
Time
1-2.5
Times in minutes
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
12.6-14.4
13.1-14.9
13.6-15.5
14.2-16.2
13.6-15.5
14.2-16.2
14.8-16.8
15.4-17.6
15.4-17.6
16.1-18.4
16.9-19.2
17.7-20.2
Harvest
Time
1-2.5
Times in minutes
24 Hour Ice Production
24 Hour Ice Production
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Air Temp.
Around Ice
Machine
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
310
280
240
200
290
260
220
180
270
240
200
160
Based on average ice slab weight of 2.94 - 3.31lb
Regular cube derate is 7%
Operating Pressures
Freeze Cycle
Harvest Cycle
Air Temp.
Discharg
Entering
Suction Discharge Suction
e
Condenser
Pressure Pressure Pressure
Pressure
°F/°C
PSIG
PSIG
PSIG
PSIG
50/10.0
200-250
50-36
150-180
75-90
70/21.1
200-250
50-36
160-190
80-100
80/26.7
220-280
50-36
170-200
90-110
90/32.2
230-320
54-38
180-220
90-120
100/37.8
270-360
56-40
200-250
95-140
110/43.3
280-380
58-42
210-260
95-150
Suction pressure drops gradually throughout the freeze cycle
Air Temp.
Around Ice
Machine
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
300
290
280
270
280
270
260
250
250
240
230
220
Based on average ice slab weight of 2.94 - 3.31 lb
Regular cube derate is 7%
Condenser
Water
Consumption
Gal/24 hours
90/32.2 Air Temperature
Around Ice Machine
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
270
560
3200
Water regulating valve set to maintain 230 PSIG discharge pressure
Operating Pressures
Air Temp.
Around Ice
Machine
°F/°C
50/10.0
70/21.1
80/26.7
90/32.2
100/37.8
110/43.3
Freeze Cycle
Harvest Cycle
Discharg
Suction Discharge Suction
e
Pressure Pressure Pressure
Pressure
PSIG
PSIG
PSIG
PSIG
225-235
50-36
160-180
80-110
225-235
50-36
170-190
85-115
225-240
50-36
170-200
85-115
225-250
50-36
170-210
90-120
225-260
52-36
170-210
90-120
225-265
54-36
175-215
95-125
Suction pressure drops gradually throughout the freeze cycle
Part No. 80-1100-3
7-35
Refrigeration System
Section 7
Q370 SERIES
Q370 SERIES
Self-Contained Air-Cooled
Self-Contained Water-Cooled
NOTE: These characteristics may vary depending on
operating conditions.
NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Cycle Times
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
10.3-11.7
11.3-12.9
12.9-14.7
14.5-16.5
11.7-13.4
12.6-14.4
13.9-15.8
16.1-18.4
12.6-14.4
13.9-15.8
15.4-17.6
17.3-19.7
Harvest
Time
1-2.5
Times in minutes
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
10.3-11.7
10.6-12.1
11.0-12.5
11.3-12.9
11.0-12.5
11.3-12.9
11.7-13.4
12.2-13.9
12.2-13.9
12.6-14.4
13.1-14.4
13.6-15.5
Harvest
Time
1-2.5
Times in minutes
24 Hour Ice Production
24 Hour Ice Production
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Air Temp.
Around Ice
Machine
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
360
330
295
265
320
300
275
240
300
275
250
225
Based on average ice slab weight of 2.94 - 3.31lb
Air Temp.
Around Ice
Machine
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
360
350
340
330
340
330
320
310
310
300
290
280
Based on average ice slab weight of 2.94 - 3.31lb
Operating Pressures
Freeze Cycle
Harvest Cycle
Air Temp.
Discharg
Entering
Suction Discharge Suction
e
Condenser
Pressure Pressure Pressure
Pressure
°F/°C
PSIG
PSIG
PSIG
PSIG
50/10.0
200-250
60-34
145-165
75-95
70/21.1
215-250
60-36
150-170
85-100
80/26.7
250-290
65-38
165-185
90-110
90/32.2
260-330
70-40
175-195
100-120
100/37.8
300-380
80-41
195-220
130-150
110/43.3
310-390
80-42
200-225
135-155
Condenser
Water
Consumption
Gal/24 hours
90/32.2 Air Temperature
Around Ice Machine
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
220
490
3700
Water regulating valve set to maintain 230 PSIG discharge pressure
Operating Pressures
Air Temp.
Around Ice
Machine
°F/°C
Suction pressure drops gradually throughout the freeze cycle
50/10.0
70/21.1
80/26.7
90/32.2
100/37.8
110/43.3
Freeze Cycle
Harvest Cycle
Discharg
Suction Discharge Suction
e
Pressure Pressure Pressure
Pressure
PSIG
PSIG
PSIG
PSIG
225-235
60-32
150-170
85-100
225-235
60-33
150-170
85-105
225-240
65-36
155-175
90-110
225-240
68-38
155-175
90-110
235-260
75-40
175-200
100-120
240-265
85-40
185-205
105-125
Suction pressure drops gradually throughout the freeze cycle
7-36
Part No. 80-1100-3
Section 7
Refrigeration System
Q420/450 SERIES
Q420/450 SERIES
Self-Contained Air-Cooled
Self-Contained Water-Cooled
NOTE: These characteristics may vary depending on
operating conditions.
NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Cycle Times
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
9.7-11.4
10.9-12.8
12.3-14.4
14.5-17.0
10.9-12.8
12.3-14.4
14.1-16.5
16.5-19.2
12.0-14.0
13.3-15.6
15.5-18.0
18.3-21.3
Harvest
Time
1-2.5
Times in minutes
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
9.9-11.7
10.1-11.9
10.4-12.2
10.6-12.5
11.4-13.4
11.7-13.7
12.0-14.0
12.3-14.4
12.6-14.8
13.0-15.2
13.3-15.6
13.7-16.0
Harvest
Time
1-2.5
Times in minutes
24 Hour Ice Production
24 Hour Ice Production
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Air Temp.
Around Ice
Machine
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
530
480
430
370
480
430
380
330
440
400
350
300
Based on average ice slab weight of 4.12 - 4.75lb
Regular cube derate is 7%
Operating Pressures
Freeze Cycle
Harvest Cycle
Air Temp.
Discharg
Entering
Suction Discharge Suction
e
Condenser
Pressure Pressure Pressure
Pressure
°F/°C
PSIG
PSIG
PSIG
PSIG
50/10.0
195-260
45-30
150-170
75-90
70/21.1
200-260
47-33
165-180
80-100
80/26.7
230-265
50-35
165-185
80-100
90/32.2
260-290
55-36
190-210
90-110
100/37.8
290-340
60-38
215-235
105-125
110/43.3
195-260
45-30
235-255
125-140
Suction pressure drops gradually throughout the freeze cycle
Air Temp.
Around Ice
Machine
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
520
510
500
490
460
450
440
430
420
410
400
390
Based on average ice slab weight of 4.12 - 4.75 lb.
Regular cube derate is 7%
Condenser
Water
Consumption
Gal/24 hours
90/32.2 Air Temperature
Around Ice Machine
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
400
740
2400
Water regulating valve set to maintain 230 PSIG discharge pressure
Operating Pressures
Air Temp.
Around Ice
Machine
°F/°C
50/10.0
70/21.1
80/26.7
90/32.2
100/37.8
110/43.3
Freeze Cycle
Harvest Cycle
Discharg
Suction Discharge Suction
e
Pressure Pressure Pressure
Pressure
PSIG
PSIG
PSIG
PSIG
235-245
50-35
165-180
85-100
235-245
50-35
165-180
85-100
235-245
50-35
165-180
85-100
235-245
52-35
165-180
85-100
235-245
52-35
165-185
85-100
240-250
55-36
165-185
85-100
Suction pressure drops gradually throughout the freeze cycle
Part No. 80-1100-3
7-37
Refrigeration System
Section 7
Q450 SERIES
Q600 SERIES
Remote
Self-Contained Air-Cooled
NOTE: These characteristics may vary depending on
operating conditions.
NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Cycle Times
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Entering
Condenser
°F/°C
-20/-28.9 to
70/21.1
80/26.7
90/32.2
100/37.8
110/43.3
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
10.6-12.5
12.0-14.0
13.3-15.6
10.9-12.8
11.1-13.1
12.0-14.0
13.3-15.6
12.3-14.4
12.6-14.8
13.7-16.0
15.5-18.0
13.7-16.0
14.1-16.5
15.5-18.0
17.6-20.6
Harvest
Time
1-2.5
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
7.1-8.4
7.8-9.2
8.6-10.1
9.5-11.2
7.8-9.2
8.6-10.1
9.5-11.2
10.6-12.5
8.6-10.1
9.5-11.2
10.4-12.2
12.0-14.0
Harvest
Time
1-2.5
Times in minutes
24 Hour Ice Production
Times in minutes
24 Hour Ice Production
Air Temp.
Entering
Condenser
°F/°C
-20/-28.9 to
70/21.1
80/26.7
90/32.2
100/37.8
110/43.3
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
490
440
400
480
470
440
400
430
420
390
350
390
380
350
310
Based on average ice slab weight of 4.12- 4.75lb
Regular cube derate is 7%
Ratings with JC0495 condenser, dice or half dice cubes
Operating Pressures
Freeze Cycle
Harvest Cycle
Air Temp.
Discharg
Entering
Suction Discharge Suction
e
Condenser
Pressure Pressure Pressure
Pressure
°F/°C
PSIG
PSIG
PSIG
PSIG
-20/-28.9 to
225-245
50-32
175-190
85-100
50/10.0
70/21.1
230-250
50-32
175-190
85-100
80/26.7
240-260
52-32
180-195
85-100
90/32.2
245-270
54-35
185-200
85-100
100/37.8
280-310
57-37
190-205
90-105
110/43.3
290-325
64-39
190-205
95-110
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
690
640
590
540
640
590
540
490
590
540
500
440
Based on average ice slab weight of 4.12- 4.75lb
Regular cube derate is 7%
Operating Pressures
Freeze Cycle
Harvest Cycle
Air Temp.
Discharg
Entering
Suction Discharge Suction
e
Condenser
Pressure Pressure Pressure
Pressure
°F/°C
PSIG
PSIG
PSIG
PSIG
50/10.0
195-260
42-22
155-180
75-95
70/21.1
220-290
44-22
160-185
85-100
80/26.7
220-305
52-22
160-190
90-110
90/32.2
250-325
52-23
175-195
95-115
100/37.8
280-355
54-30
195-210
95-125
110/43.3
300-385
56-32
200-225
100-135
Suction pressure drops gradually throughout the freeze cycle
Suction pressure drops gradually throughout the freeze cycle
7-38
Part No. 80-1100-3
Section 7
Refrigeration System
Q600 SERIES
Q600 SERIES
Self-Contained Water-Cooled
Remote
NOTE: These characteristics may vary depending on
operating conditions.
NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Cycle Times
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Around Ice
Machine
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
7.4-8.7
7.5-8.9
7.8-9.2
7.9-9.4
8.2-9.7
8.4-9.9
8.7-10.3
8.9-10.5
9.5-11.2
9.7-11.4
9.9-11.7
10.1-11.9
Harvest
Time
1-2.5
Times in minutes
24 Hour Ice Production
Air Temp.
Around Ice
Machine
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
50/10.0
70/21.1
90/32.2
670
660
640
630
610
600
580
570
540
530
520
510
90/32.2 Air Temperature
Around Ice Machine
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
600
1250
6800
Water regulating valve set to maintain 230 PSIG discharge pressure
Operating Pressures
Air Temp.
Around Ice
Machine
°F/°C
50/10.0
70/21.1
80/26.7
90/32.2
100/37.8
110/43.3
50/10.0
70/21.1
90/32.2
7.9-9.4
8.9-10.5
9.5-11.2
8.0-9.4
8.1-9.5
8.4-9.9
8.9-10.5
9.0-10.6
9.1-10.7
9.5-11.2
10.1-11.9
9.6-11.3
9.7-11.4
10.1-11.9
10.9-12.8
Harvest
Time
1-2.5
24 Hour Ice Production
Based on average ice slab weight of 4.12 - 4.75 lb
Regular cube derate is 7%
Gal/24 hours
Freeze Time
Water Temperature °F/°C
Times in minutes
Water Temperature °F/°C
Condenser
Water
Consumption
Air Temp.
Entering
Condenser
°F/°C
-20/-28.9 to
70/21.1
80/26.7
90/32.2
100/37.8
110/43.3
Freeze Cycle
Discharg
Suction
e
Pressure
Pressure
PSIG
PSIG
225-235
46-25
225-235
46-26
225-235
48-26
225-240
48-26
225-245
50-28
225-250
52-28
Harvest Cycle
Discharg
Suction
e
Pressure
Pressure
PSIG
PSIG
140-184
80-102
148-184
82-104
154-186
86-108
154-190
86-108
162-194
86-112
165-200
86-115
Air Temp.
Entering
Condenser
°F/°C
-20/-28.9 to
70/21.1
80/26.7
90/32.2
100/37.8
110/43.3
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
630
570
540
625
620
600
570
565
560
540
510
535
530
510
480
Based on average ice slab weight of 4.12- 4.75 lb
Regular cube derate is 7%
Ratings with JC0895 condenser, dice or half dice cubes
Operating Pressures
Freeze Cycle
Air Temp.
Discharg
Entering
Suction
e
Condenser
Pressure
Pressure
°F/°C
PSIG
PSIG
-20/-28.9 to
220-250
42-26
50/10.0
70/21.1
225-260
44-26
80/26.7
245-265
46-26
90/32.2
250-265
48-26
100/37.8
265-295
52-26
110/43.3
300-335
52-28
Harvest Cycle
Discharg
Suction
e
Pressure
Pressure
PSIG
PSIG
152-170
75-100
155-172
156-174
157-174
158-176
158-176
82-100
82-100
84-100
84-100
84-105
Suction pressure drops gradually throughout the freeze cycle
Suction pressure drops gradually throughout the freeze cycle
Part No. 80-1100-3
7-39
Refrigeration System
Section 7
Q800 SERIES
Q800 SERIES
Self-Contained Air-Cooled
Self-Contained Water-Cooled
NOTE: These characteristics may vary depending on
operating conditions.
NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Cycle Times
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
8.9-10.2
9.3-10.7
10.3-11.9
12.1-13.8
9.7-11.1
10.2-11.7
11.4-13.1
13.3-15.2
10.3-11.9
10.9-12.5
12.3-14.1
14.4-16.5
Harvest
Time
1-2.5
Times in minutes
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
8.7-10.1
8.9-10.2
9.0-10.3
9.1-10.5
9.5-11.0
9.7-11.1
9.8-11.3
10.0-11.5
10.9-12.5
11.0-12.7
11.2-12.9
11.4-13.1
Harvest
Time
1-2.5
Times in minutes
24 Hour Ice Production
24 Hour Ice Production
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Air Temp.
Around Ice
Machine
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
800
770
700
610
740
710
640
560
700
670
600
520
Based on average ice slab weight of 5.75- 6.50 lb
Regular cube derate is 7%
Operating Pressures
Freeze Cycle
Air Temp.
Discharg
Entering
Suction
e
Condenser
Pressure
Pressure
°F/°C
PSIG
PSIG
50/10.0
220-280
31-18
70/21.1
220-280
32-18
80/26.7
225-280
36-20
90/32.2
260-295
38-22
100/37.8
300-330
40-24
110/43.3
320-360
44-26
Harvest Cycle
Discharg
Suction
e
Pressure
Pressure
PSIG
PSIG
135-180
65-90
140-180
70-90
140-180
70-95
150-200
80-100
210-225
80-100
210-240
85-120
Suction pressure drops gradually throughout the freeze cycle
Air Temp.
Around Ice
Machine
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
810
800
790
780
750
740
730
720
670
660
650
640
Based on average ice slab weight of 5.75- 6.50lb
Regular cube derate is 7%
Condenser
Water
Consumption
Gal/24 hours
90/32.2 Air Temperature
Around Ice Machine
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
640
1420
6000
Water regulating valve set to maintain 230 PSIG discharge pressure
Operating Pressures
Air Temp.
Around Ice
Machine
°F/°C
50/10.0
70/21.1
80/26.7
90/32.2
100/37.8
110/43.3
Freeze Cycle
Discharg
Suction
e
Pressure
Pressure
PSIG
PSIG
225-235
33-20
225-235
34-20
225-235
34-20
225-235
36-22
225-235
36-22
225-240
38-24
Harvest Cycle
Discharg
Suction
e
Pressure
Pressure
PSIG
PSIG
160-185
65-85
165-185
70-85
165-185
70-85
165-185
70-85
165-185
70-85
170-190
75-90
Suction pressure drops gradually throughout the freeze cycle
7-40
Part No. 80-1100-3
Section 7
Refrigeration System
Q800 SERIES
Q1000 SERIES
Remote
Self-Contained Air-Cooled
NOTE: These characteristics may vary depending on
operating conditions.
NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Cycle Times
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Entering
Condenser
°F/°C
-20/-28.9 to
70/21.1
80/26.7
90/32.2
100/37.8
110/43.3
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
9.5-11.0
10.6-12.2
11.6-13.4
9.7-11.1
9.8-11.3
10.6-12.2
11.9-13.6
10.8-12.4
11.0-12.6
11.9-13.6
13.4-15.4
11.9-13.6
12.1-13.8
13.2-15.1
14.7-16.9
Harvest
Time
1-2.5
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
9.9-10.6
10.2-11.0
10.9-11.7
12.1-13.0
10.6-11.4
11.2-12.0
11.9-12.8
13.2-14.1
11.3-12.2
11.9-12.8
12.8-13.7
14.2-15.2
Harvest
Time
1-2.5
Times in minutes
24 Hour Ice Production
Times in minutes
24 Hour Ice Production
Air Temp.
Entering
Condenser
°F/°C
-20/-28.9 to
70/21.1
80/26.7
90/32.2
100/37.8
110/43.3
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
750
685
630
740
730
685
620
675
665
620
555
620
610
565
510
Based on average ice slab weight of 5.75- 6.50lb
Regular cube derate is 7%
Ratings with JC0895 condenser, dice or half dice cubes
Operating Pressures
Freeze Cycle
Air Temp.
Discharg
Entering
Suction
e
Condenser
Pressure
Pressure
°F/°C
PSIG
PSIG
-20/-28.9 to
220-250
30-22
50/10.0
70/21.1
225-250
32-22
80/26.7
240-260
33-22
90/32.2
255-265
34-22
100/37.8
275-295
38-24
110/43.3
280-320
40-26
Harvest Cycle
Discharg
Suction
e
Pressure
Pressure
PSIG
PSIG
180-200
65-90
190-200
190-205
195-205
200-210
200-225
70-90
70-90
70-90
70-90
75-100
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
980
950
900
820
920
880
830
760
870
830
780
710
Based on average ice slab weight of 7.75 - 8.25lb
Regular cube derate is 7%
Operating Pressures
Freeze Cycle
Air Temp.
Discharg
Entering
Suction
e
Condenser
Pressure
Pressure
°F/°C
PSIG
PSIG
50/10.0
220-280
38-18
70/21.1
220-280
40-18
80/26.7
225-280
42-20
90/32.2
260-295
42-22
100/37.8
300-330
42-24
110/43.3
320-360
44-24
Harvest Cycle
Discharg
Suction
e
Pressure
Pressure
PSIG
PSIG
135-180
65-90
140-180
70-90
140-180
70-95
150-200
80-100
210-225
80-100
210-240
85-120
Suction pressure drops gradually throughout the freeze cycle
Suction pressure drops gradually throughout the freeze cycle
Part No. 80-1100-3
7-41
Refrigeration System
Section 7
Q1000 SERIES
Q1000 SERIES
Self-Contained Water-Cooled
Remote
NOTE: These characteristics may vary depending on
operating conditions.
NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Cycle Times
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Around Ice
Machine
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
10.0-10.7
10.1-10.9
10.2-11.0
10.4-11.1
10.6-11.4
10.8-11.6
10.9-11.7
11.0-11.8
12.1-13.0
12.3-13.2
12.5-14.3
12.6-14.4
Harvest
Time
1-2.5
Times in minutes
24 Hour Ice Production
Air Temp.
Around Ice
Machine
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
50/10.0
70/21.1
90/32.2
970
960
950
940
920
910
900
890
820
810
800
790
90/32.2 Air Temperature
Around Ice Machine
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
750
1500
6200
Water regulating valve set to maintain 230 PSIG discharge pressure
Operating Pressures
Air Temp.
Around Ice
Machine
°F/°C
50/10.0
70/21.1
80/26.7
90/32.2
100/37.8
110/43.3
50/10.0
70/21.1
90/32.2
10.5-11.3
11.3-12.2
12.1-13.0
10.7-11.5
10.8-11.6
11.5-12.3
12.3-13.2
11.5-12.3
11.6-12.5
12.5-13.4
13.4-14.3
12.3-13.2
12.5-13.4
13.4-14.3
14.4-15.5
Harvest
Time
1-2.5
24 Hour Ice Production
Based on average ice slab weight of 7.75- 8.25lb
Regular cube derate is 7%
Gal/24 hours
Freeze Time
Water Temperature °F/°C
Times in minutes
Water Temperature °F/°C
Condenser
Water
Consumption
Air Temp.
Entering
Condenser
°F/°C
-20/-28.9 to
70/21.1
80/26.7
90/32.2
100/37.8
110/43.3
Freeze Cycle
Discharg
Suction
e
Pressure
Pressure
PSIG
PSIG
225-235
36-18
225-235
38-18
225-235
40-18
225-235
40-20
225-235
40-20
225-240
42-20
Harvest Cycle
Discharg
Suction
e
Pressure
Pressure
PSIG
PSIG
160-185
65-85
165-185
70-85
165-185
70-85
165-185
70-85
165-185
70-85
170-190
75-90
Air Temp.
Entering
Condenser
°F/°C
-20/-28.9 to
70/21.1
80/26.7
90/32.2
100/37.8
110/43.3
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
930
870
820
915
906
860
810
860
850
800
750
810
800
750
700
Based on average ice slab weight of 7.75- 8.25lb
Regular cube derate is 7%
Ratings with JC1095 condenser, dice or half dice cubes
Operating Pressures
Freeze Cycle
Harvest Cycle
Air Temp.
Discharg
Entering
Suction Discharge Suction
e
Condenser
Pressure Pressure Pressure
Pressure
°F/°C
PSIG
PSIG
PSIG
PSIG
-20/-28.9 to
220-250
40-22
180-200
65-90
50/10.0
70/21.1
225-250
40-22
190-200
70-90
80/26.7
240-260
42-22
190-205
70-90
90/32.2
255-265
44-22
195-205
70-90
100/37.8
275-295
44-24
200-210
70-90
110/43.3
280-320
46-26
200-225
75-100
Suction pressure drops gradually throughout the freeze cycle
Suction pressure drops gradually throughout the freeze cycle
7-42
Part No. 80-1100-3
Section 7
Refrigeration System
Q1300 SERIES
Q1300 SERIES
Self-Contained Air-Cooled
Self-Contained Water-Cooled
NOTE: These characteristics may vary depending on
operating conditions.
NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Cycle Times
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
9.4-10.5
9.9-11.1
11.0-12.3
12.3-13.7
9.9-11.1
10.6-11.8
11.5-12.8
13.2-14.7
10.9-12.2
11.6-12.9
12.8-14.2
14.7-16.3
Harvest
Time
1-2.5
Times in minutes
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
9.0-10.1
9.1-10.1
9.2-10.3
9.4-10.5
9.8-10.9
9.8-11.0
10.0-11.2
10.1-11.3
11.4-12.6
11.6-12.9
12.0-13.3
12.2-13.6
Harvest
Time
1-2.5
Times in minutes
24 Hour Ice Production
24 Hour Ice Production
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Air Temp.
Around Ice
Machine
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
1320
1260
1150
1040
1260
1190
1110
980
1160
1100
1010
890
Based on average ice slab weight of 10.0- 11.0 lb
Regular cube derate is 7%
Operating Pressures
Freeze Cycle
Air Temp.
Discharg
Entering
Suction
e
Condenser
Pressure
Pressure
°F/°C
PSIG
PSIG
50/10.0
220-280
40-20
70/21.1
220-280
40-20
80/26.7
220-280
42-22
90/32.2
245-300
48-26
100/37.8
275-330
50-26
110/43.3
280-360
52-28
Harvest Cycle
Discharg
Suction
e
Pressure
Pressure
PSIG
PSIG
140-170
65-80
145-170
70-80
150-185
70-80
160-190
70-85
160-210
70-90
165-225
75-100
Suction pressure drops gradually throughout the freeze cycle
Air Temp.
Around Ice
Machine
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
1370
1360
1340
1320
1280
1270
1250
1240
1120
1100
1070
1050
Based on average ice slab weight of 10.0 - 11.0 lb
Regular cube derate is 7%
Condenser
Water
Consumption
Gal/24 hours
90/32.2 Air Temperature
Around Ice Machine
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
1150
2220
7400
Water regulating valve set to maintain 240 PSIG discharge pressure
Operating Pressures
Air Temp.
Around Ice
Machine
°F/°C
50/10.0
70/21.1
80/26.7
90/32.2
100/37.8
110/43.3
Freeze Cycle
Harvest Cycle
Discharg
Suction Discharge Suction
e
Pressure Pressure Pressure
Pressure
PSIG
PSIG
PSIG
PSIG
235-245
40-18
150-180
70-80
235-245
40-18
150-180
70-80
235-245
40-20
150-180
70-80
235-250
42-20
150-180
70-80
235-255
44-20
150-180
70-80
240-265
46-20
150-180
70-80
Suction pressure drops gradually throughout the freeze cycle
Part No. 80-1100-3
7-43
Refrigeration System
Section 7
Q1300 SERIES
Q1600 SERIES
Remote
Self-Contained Water-Cooled
NOTE: These characteristics may vary depending on
operating conditions.
NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Cycle Times
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Entering
Condenser
°F/°C
-20/-28.9 to
70/21.1
80/26.7
90/32.2
100/37.8
110/43.3
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
9.9-11.1
10.9-12.2
11.7-13.0
10.0-11.2
10.1-11.3
10.8-12.0
11.7-13.0
11.0-12.3
11.1-12.4
11.8-13.2
12.9-14.3
11.1-12.4
10.7-11.9
12.8-14.2
13.8-15.4
Harvest
Time
1-2.5
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
7.2-8.1
7.3-8.2
7.4-8.2
7.4-8.3
8.0-9.0
8.1-9.1
8.2-9.1
8.4-9.4
8.9-9.9
9.2-10.2
9.6-10.7
9.7-10.8
Harvest
Time
1-2.5
Times in minutes
24 Hour Ice Production
Times in minutes
24 Hour Ice Production
Air Temp.
Entering
Condenser
°F/°C
-20/-28.9 to
70/21.1
80/26.7
90/32.2
100/37.8
110/43.3
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
1260
1160
1090
1250
1240
1170
1090
1150
1140
1080
1000
1140
1180
1010
940
Based on average ice slab weight of 10.0- 11.0 lb
Ratings with JC1395 condenser, dice or half dice cubes
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
70/21.1
50/10.0
70/21.1
90/32.2
1650
1635
1625
1620
1650
1510
1500
1490
1450
1510
1390
1350
1300
1290
1390
Based on average ice slab weight of 13.0 -14.12 lb
Condenser
Water
Consumption
Gal/24 hours
Operating Pressures
Water Temperature °F/°C
90/32.2 Air Temperature
Around Ice Machine
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
1400
2235
6500
Water regulating valve set to maintain 240 PSIG discharge pressure
Freeze Cycle
Air Temp.
Discharg
Entering
Suction
e
Condenser
Pressure
Pressure
°F/°C
PSIG
PSIG
-20/-28.9 to
220-250
40-22
50/10.0
70/21.1
240-260
40-22
80/26.7
240-270
41-22
90/32.2
250-290
42-22
100/37.8
280-320
46-22
110/43.3
310-360
48-24
Harvest Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
135-170
75-95
140-180
140-190
140-200
140-210
140-220
80-95
80-95
80-95
80-95
85-100
Suction pressure drops gradually throughout the freeze cycle
Operating Pressures
Freeze Cycle
Air Temp.
Entering Discharge Suction
Condenser Pressure Pressure
°F/°C
PSIG
PSIG
-20/-28.9 to
235-245
48-24
50/10.0
70/21.1
235-265
52-26
80/26.7
235-270
52-26
90/32.2
235-280
52-28
100/37.8
240-285
52-28
110/43.3
240-290
54-28
Harvest Cycle
Discharge Suction
Pressure Pressure
PSIG
PSIG
145-170
70-90
150-175
150-175
155-180
155-180
155-185
70-90
75-95
75-95
80-100
80-100
Suction pressure drops gradually throughout the freeze cycle
7-44
Part No. 80-1100-3
Section 7
Refrigeration System
Q1600 SERIES
Q1800 SERIES
Remote
Self-Contained Air-Cooled
NOTE: These characteristics may vary depending on
operating conditions.
NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Cycle Times
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Entering
Condenser
°F/°C
-20 to 70
-29 to 21.1
90/32.2
100/37.8
110/43.3
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
7.5-8.4
8.2-9.2
9.0-10.1
8.0-8.9
8.4-9.3
9.2-10.3
8.6-9.6
9.2-10.2
10.0-11.2
9.2-10.3
9.7-10.8
10.4-11.6
Harvest
Time
1 - 2.5
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
8.5-9.3
9.0-9.9
9.6-10.5
10.6-11.6
9.4-10.3
9.8-10.8
10.4-11.5
11.5-12.6
9.9-10.9
10.5-11.5
11.1-12.2
12.4-13.6
Harvest
Time
1-2.5
Times in minutes
Times in minutes
24 Hour Ice Production
24 Hour Ice Production
Air Temp.
Entering
Condenser
°F/°C
-20 to 70
-29 to 21.1
90/32.2
100/37.8
110/43.3
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
1600
1478
1370
1523
1460
1343
1425
1350
1250
1340
1290
1213
Based on average ice slab weight of 13.0- 14.12lb
Ratings with JC1895 condenser, dice or half dice cubes
Operating Pressures
Freeze Cycle
Harvest Cycle
Air Temp.
Discharg
Entering
Suction Discharge Suction
e
Condenser
Pressure Pressure Pressure
Pressure
°F/°C
PSIG
PSIG
PSIG
PSIG
-20 to 50/-29
220-255
52-26
100-120
70-85
to 10.0
70/21.1
250-270
56-28
110-120
75-90
80/26.7
250-275
56-28
110-120
75-90
90/32.2
255-285
56-28
110-120
80-90
100/37.8
270-310
56-30
115-130
80-95
110/43.3
305-350
58-32
120-135
80-100
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
1880
1780
1690
1550
1720
1650
1570
1440
1640
1560
1480
1350
Based on average ice slab weight of 13.0 - 14.12lb
Regular cube derate is 7%
Operating Pressures
Freeze Cycle
Harvest Cycle
Air Temp.
Discharg
Entering
Suction Discharge Suction
e
Condenser
Pressure Pressure Pressure
Pressure
°F/°C
PSIG
PSIG
PSIG
PSIG
50/10.0
220-280
40-20
155-190
60-80
70/21.1
220-280
40-20
160-190
65-80
80/26.7
230-290
42-20
160-190
65-80
90/32.2
260-320
44-22
185-205
70-90
100/37.8
300-360
46-24
210-225
75-100
110/43.3
320-400
48-26
215-240
80-100
Suction pressure drops gradually throughout the freeze cycle
Suction pressure drops gradually throughout the freeze cycle
Part No. 80-1100-3
7-45
Refrigeration System
Section 7
Q1800 SERIES
Q1800 SERIES
Self-Contained Water-Cooled
Remote
NOTE: These characteristics may vary depending on
operating conditions.
NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Cycle Times
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Around Ice
Machine
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
8.7-9.6
9.0-9.9
9.1-10.1
9.2-10.1
9.6-10.5
9.6-10.6
9.7-10.7
9.8-10.7
10.8-11.9
10.8-11.9
10.9-12.0
11.1-12.1
Harvest
Time
1-2.5
Times in minutes
24 Hour Ice Production
Air Temp.
Around Ice
Machine
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
50/10.0
70/21.1
90/32.2
1840
1780
1760
1750
1690
1680
1670
1660
1520
1520
1510
1490
Based on average ice slab weight of 13.0- 14.12lb
Regular cube derate is 7%
Gal/24 hours
90/32.2 Air Temperature
Around Ice Machine
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
2000
2670
7750
Water regulating valve set to maintain 240 PSIG discharge pressure
Operating Pressures
Air Temp.
Around Ice
Machine
°F/°C
50/10.0
70/21.1
80/26.7
90/32.2
100/37.8
110/43.3
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
9.1-10.0
9.8-10.8
10.7-11.7
9.3-10.2
9.5-10.5
10.1-11.1
11.0-12.1
10.1-11.1
10.3-11.4
11.1-12.2
12.1-13.2
10.9-12.0
11.1-12.2
11.9-13.0
12.7-13.9
Harvest
Time
1-2.5
Times in minutes
Water Temperature °F/°C
Condenser
Water
Consumption
Air Temp.
Entering
Condenser
°F/°C
-20/-28.9 to
70/21.1
80/26.7
90/32.2
100/37.8
110/43.3
Freeze Cycle
Discharg
Suction
e
Pressure
Pressure
PSIG
PSIG
235-245
36-20
235-245
38-20
235-245
40-20
235-250
42-22
235-255
44-22
235-260
46-22
Harvest Cycle
Discharg
Suction
e
Pressure
Pressure
PSIG
PSIG
170-190
65-80
170-190
65-80
170-190
65-80
175-190
65-80
175-190
65-80
175-190
65-80
24 Hour Ice Production
Air Temp.
Entering
Condenser
°F/°C
-20/-28.9 to
70/21.1
80/26.7
90/32.2
100/37.8
110/43.3
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
1770
1650
1540
1735
1700
1620
1500
1615
1580
1480
1380
1510
1480
1400
1320
Based on average ice slab weight of 13.0 - 14.12lb
Regular cube derate is 7%
Ratings with JC1895 condenser, dice or half dice cubes
Operating Pressures
Freeze Cycle
Harvest Cycle
Air Temp.
Discharg
Entering
Suction Discharge Suction
e
Condenser
Pressure Pressure Pressure
Pressure
°F/°C
PSIG
PSIG
PSIG
PSIG
-20/-28.9 to
220-250
38-24
160-180
60-80
50/10.0
70/21.1
220-260
40-24
170-180
60-80
80/26.7
250-270
48-24
175-190
70-90
90/32.2
250-280
50-24
180-200
80-90
100/37.8
270-300
52-28
205-215
80-95
110/43.3
300-350
54-28
205-230
80-100
Suction pressure drops gradually throughout the freeze cycle
Suction pressure drops gradually throughout the freeze cycle
7-46
Part No. 80-1100-3
Section 7
Refrigeration System
Refrigerant Recovery/Evacuation and Recharging
NORMAL SELF-CONTAINED MODEL PROCEDURES
SELF-CONTAINED RECOVERY/EVACUATION
Refrigerant Recovery/Evacuation
1. Place the toggle switch in the OFF position.
Do not purge refrigerant to the atmosphere. Capture
refrigerant using recovery equipment. Follow the
manufacturer’s recommendations.
2. Install manifold gauges, charging cylinder/scale, and
recovery unit or two-stage vacuum pump.
MANIFOLD SET
Important
Manitowoc Ice, Inc. assumes no responsibility for
the use of contaminated refrigerant. Damage
resulting from the use of contaminated refrigerant is
the sole responsibility of the servicing company.
OPEN
LOW SIDE
SERVICE
VALVE
BACKSEATED
OPEN
BACKSEATED
HIGH SIDE
SERVICE
VALVE
Important
Replace the liquid line drier before evacuating and
recharging. Use only a Manitowoc (O.E.M.) liquid
line filter drier to prevent voiding the warranty.
CONNECTIONS
1. Suction side of the compressor through the suction
service valve.
2. Discharge side of the compressor through the
discharge service valve.
VACUUM PUMP/
RECOVERY UNIT
OPEN
CLOSED
SV1404A
Figure 7-14. Recovery/Evacuation Connections
3. Open (backseat) the high and low side ice machine
service valves, and open high and low side on
manifold gauges.
4. Perform recovery or evacuation:
A. Recovery: Operate the recovery unit as directed
by the manufacturer’s instructions.
B. Evacuation prior to recharging: Pull the system
down to 250 microns. Then, allow the pump to
run for an additional half hour. Turn off the pump
and perform a standing vacuum leak check.
NOTE: Check for leaks using a halide or electronic leak
detector after charging the ice machine.
5. Refer to Charging Procedures.
Part No. 80-1100-3
7-47
Refrigeration System
Section 7
2. Close the vacuum pump valve, the low side service
valve, and the low side manifold gauge valve.
Self-Contained Charging Procedures
Important
The charge is critical on all Manitowoc ice
machines. Use a scale or a charging cylinder to
ensure the proper charge is installed.
1. Be sure the toggle switch is in the OFF position.
4. Open the charging cylinder and add the proper
refrigerant charge (shown on nameplate) through
the discharge service valve.
5. Let the system “settle” for 2 to 3 minutes.
6. Place the toggle switch in the ICE position.
MANIFOLD SET
LOW SIDE
SERVICE
VALVE
3. Open the high side manifold gauge valve, and
backseat the high side service valve.
CLOSED
OPEN
FRONTSEATED
BACKSEATED
7. Close the high side on the manifold gauge set. Add
any remaining vapor charge through the suction
service valve (if necessary).
NOTE: Manifold gauges must be removed properly to
ensure that no refrigerant contamination or loss occurs.
HIGH SIDE
SERVICE
VALVE
8. Make sure that all of the vapor in the charging hoses
is drawn into the ice machine before disconnecting
the charging hoses.
A. Run the ice machine in freeze cycle.
B. Close the high side service valve at the ice
machine.
CHARGING
CYLINDER
VACUUM PUMP/
RECOVERY UNIT
D. Open the high and low side valves on the
manifold gauge set. Any refrigerant in the lines
will be pulled into the low side of the system.
CLOSED
OPEN
SV1404B
Figure 7-15. Charging Connections
C. Open the low side service valve at the ice
machine.
E. Allow the pressures to equalize while the ice
machine is in the freeze cycle.
F. Close the low side service valve at the ice
machine.
Remove the hoses from the ice machine and install the
caps.
7-48
Part No. 80-1100-3
Section 7
Refrigeration System
NORMAL REMOTE MODEL PROCEDURES
Refrigerant Recovery/Evacuation
Do not purge refrigerant to the atmosphere. Capture
refrigerant using recovery equipment. Follow the
manufacturer’s recommendations.
Important
Manitowoc Ice, Inc. assumes no responsibility for
the use of contaminated refrigerant. Damage
resulting from the use of contaminated refrigerant is
the sole responsibility of the servicing company.
NOTE: Manitowoc recommends using an access valve
core removal and installation tool on the discharge line
quick-connect fitting. This permits access valve core
removal. This allows for faster evacuation and charging,
without removing the manifold gauge hose.
REMOTE RECOVERY/EVACUATION
1. Place the toggle switch in the OFF position.
2. Install manifold gauges, charging cylinder/scale, and
recovery unit or two-stage vacuum pump.
3. Open (backseat) the high and low side ice machine
service valves.
4. Open the receiver service valve halfway.
Important
Replace the liquid line drier before evacuating and
recharging. Use only a Manitowoc (O.E.M.) liquid
line filter drier to prevent voiding the warranty.
CONNECTIONS
Important
Recovery/evacuation of a remote system requires
connections at four points for complete system
evacuation. See the drawing on next page.
5. Open high and low side on the manifold gauge set.
6. Perform recovery or evacuation:
A. Recovery: Operate the recovery unit as directed
by the manufacturer’s instructions.
B. Evacuation prior to recharging: Pull the system
down to 250 microns. Then, allow the pump to
run for an additional hour. Turn off the pump and
perform a standing vacuum leak check.
NOTE: Check for leaks using a halide or electronic leak
detector after charging the ice machine.
7. Refer to Charging Procedures.
Make these connections:
•
Suction side of the compressor through the suction
service valve.
•
Discharge side of the compressor through the
discharge service valve.
•
Receiver outlet service valve, which evacuates the
area between the check valve in the liquid line and
the pump down solenoid.
•
Access (Schrader) valve on the discharge line quickconnect fitting, located on the outside of the
compressor/evaporator compartment. This
connection evacuates the condenser. Without it, the
magnetic check valves would close when the
pressure drops during evacuation, preventing
complete evacuation of the condenser.
Part No. 80-1100-3
7-49
Refrigeration System
Section 7
EV A PO RAT O R
HEAT E X CHANGER
EX PANSIO N
V A LV E
x
H O T GAS
SO LEN O ID
V A LV ES
LO W SIDE
SER V ICE V A LV E
(BAC K SEATED )
C O M PRESS O R
STRAINER
HAR V EST
PRESS U RE
SO LEN O ID
V A LV E
CHEC K
V A LV E
x
HAR V EST
PRESS U RE
REG U LATING
V A LV E
x
HIGH SIDE
SER V ICE V A LV E
(BAC K SEATED )
LIQU ID
LINE
SO LEN O ID
DISCHARGE LINE
QU ICK CO NNECT
SCHRAEDER FITTING
DRIER
RE M O TE CO NDENSER
RECEI V ER
SER V ICE V A LV E
1/2 O PEN
B
CHEC K V A LV E
R
C
HEAD PRESS U RE
C O NTR O L V A LV E
M ANIFO LD SET
O PEN
TEE
O PEN
O PEN
V AC UU M PU M P/
REC O V ER Y U NIT
SCA LE
C LO SED
SV1461
Figure 7-16. Recovery/Evacuation Connections
7-50
Part No. 80-1100-3
Section 7
Remote Charging Procedures
1. Be sure the toggle switch is in the OFF position.
2. Close the vacuum pump valve, the low and high side
service valves (frontseat), and the low side manifold
gauge valve.
Refrigeration System
NOTE: Backseat the receiver outlet service valve after
charging is complete and before operating the ice
machine. If the access valve core removal and
installation tool is used on the discharge quick-connect
fitting, reinstall the Schraeder valve core before
disconnecting the access tool and hose.
3. Open the charging cylinder and add the proper
refrigerant charge (shown on nameplate) into the
system high side (receiver outlet valve and
discharge lines quick-connect fitting).
6. Run the ice machine in freeze cycle.
4. If the high side does not take the entire charge,
close the high side on the manifold gauge set, and
backseat (open) the low side service valve and
receiver outlet service valve. Start the ice machine
and add the remaining charge through the low side
(in vapor form) until the machine is fully charged.
9. Open the high and low side valves on the manifold
gauge set. Any refrigerant in the lines will be pulled
into the low side of the system.
5. Ensure all vapor in charging hoses is drawn into the
machine, then disconnect the manifold gauges.
Part No. 80-1100-3
7. Close the high side service valve at the ice machine.
8. Open the low side service valve at the ice machine.
10. Allow the pressures to equalize while the ice
machine is in the freeze cycle.
11. Close the low side service valve at the ice machine.
12. Remove the hoses from the ice machine and install
the caps.
7-51
Refrigeration System
Section 7
EV A PO RAT O R
HEAT E X CHANGER
EX PANSIO N
V A LV E
H O T GAS
SO LEN O ID
V A LV ES
x
LO W SIDE
SER V ICE V A LV E
(BAC K SEATED )
STRAINER
C O M PRESS O R
HAR V EST
PRESS U RE
SO LEN O ID
V A LV E
CHEC K
V A LV E
x
HAR V EST
PRESS U RE
REG U LATING
V A LV E
x
HIGH SIDE
SER V ICE V A LV E
(BAC K SEATED )
LIQU ID
LINE
SO LEN O ID
DISCHARGE LINE
QU ICK CO NNECT
SCHRAEDER FITTING
DRIER
RE M O TE CO NDENSER
RECEI V ER
SER V ICE V A LV E
1/2 O PEN
B
CHEC K V A LV E
R
C
HEAD PRESS U RE
C O NTR O L V A LV E
M ANIFO LD SET
TEE
C LO SED
O PEN
C LO SED
SCA LE
V AC UU M PU M P/
REC O V ER Y U NIT
SV1462
O PEN
Figure 7-17. Remote Charging Connections
7-52
Part No. 80-1100-3
Section 7
Refrigeration System
SYSTEM CONTAMINATION CLEAN-UP
General
This section describes the basic requirements for
restoring contaminated systems to reliable service.
Important
Manitowoc Ice, Inc. assumes no responsibility for
the use of contaminated refrigerant. Damage
resulting from the use of contaminated refrigerant is
the sole responsibility of the servicing company.
If either condition is found, or if contamination is
suspected, use a Total Test Kit from Totaline or a similar
diagnostic tool. These devices sample refrigerant,
eliminating the need to take an oil sample. Follow the
manufacturer’s directions.
If a refrigerant test kit indicates harmful levels of
contamination, or if a test kit is not available, inspect the
compressor oil.
1. Remove the refrigerant charge from the ice
machine.
2. Remove the compressor from the system.
Determining Severity Of Contamination
3. Check the odor and appearance of the oil.
System contamination is generally caused by either
moisture or residue from compressor burnout entering
the refrigeration system.
4. Inspect open suction and discharge lines at the
compressor for burnout deposits.
Inspection of the refrigerant usually provides the first
indication of system contamination. Obvious moisture or
an acrid odor in the refrigerant indicates contamination.
5. If no signs of contamination are present, perform an
acid oil test.
Check the chart below to determine the type of cleanup
required.
Contamination/Cleanup Chart
Symptoms/Findings
Required Cleanup Procedure
No symptoms or suspicion of contamination
Normal evacuation/recharging procedure
Moisture/Air Contamination symptoms
Refrigeration system open to atmosphere for longer than 15
minutes
Mild contamination cleanup procedure
Refrigeration test kit and/or acid oil test shows contamination
Leak in water-cooled condenser
No burnout deposits in open compressor lines
Mild Compressor Burnout symptoms
Oil appears clean but smells acrid
Mild contamination cleanup procedure
Refrigeration test kit or acid oil test shows harmful acid content
No burnout deposits in open compressor lines
Severe Compressor Burnout symptoms
Oil is discolored, acidic, and smells acrid
Severe contamination cleanup procedure
Burnout deposits found in the compressor and lines, and in
other components
Part No. 80-1100-3
7-53
Refrigeration System
Mild System Contamination Cleanup Procedure
Section 7
Severe System Contamination Cleanup Procedure
1. Replace any failed components.
1. Remove the refrigerant charge.
2. If the compressor is good, change the oil.
2. Remove the compressor.
3. Replace the liquid line drier.
3. Disassemble the harvest solenoid valve. If burnout
deposits are found inside the valve, install a rebuild
kit, and replace manifold strainer, TXV and harvest
pressure regulating valve.
NOTE: If the contamination is from moisture, use heat
lamps during evacuation. Position them at the
compressor, condenser and evaporator prior to
evacuation. Do not position heat lamps too close to
plastic components, or they may melt or warp.
4. Wipe away any burnout deposits from suction and
discharge lines at compressor.
5. Sweep through the open system with dry nitrogen.
Important
Dry nitrogen is recommended for this procedure.
This will prevent CFC release.
4. Follow the normal evacuation procedure, except
replace the evacuation step with the following:
A. Pull vacuum to 1000 microns. Break the vacuum
with dry nitrogen and sweep the system.
Pressurize to a minimum of 5 psi.
B. Pull vacuum to 500 microns. Break the vacuum
with dry nitrogen and sweep the system.
Pressurize to a minimum of 5 psi.
C. Change the vacuum pump oil.
D. Pull vacuum to 250 microns. Run the vacuum
pump for 1/2 hour on self-contained models, 1
hour on remotes.
Important
Refrigerant sweeps are not recommended, as they
release CFC’s into the atmosphere.
6. Install a new compressor and new start components.
7. Install a suction line filter-drier with acid and
moisture removal capability (P/N 89-3028-3). Place
the filter drier as close to the compressor as
possible.
8. Install an access valve at the inlet of the suction line
drier.
9. Install a new liquid line drier.
Continued on next page …
NOTE: You may perform a standing vacuum test to
make a preliminary leak check. You should use an
electronic leak detector after system charging to be sure
there is no leak.
5. Charge the system with the proper refrigerant to the
nameplate charge.
6. Operate the ice machine.
7-54
Part No. 80-1100-3
Section 7
Refrigeration System
10. Follow the normal evacuation procedure, except
replace the evacuation step with the following:
Important
Dry nitrogen is recommended for this procedure.
This will prevent CFC release.
REPLACING PRESSURE CONTROLS WITHOUT
REMOVING REFRIGERANT CHARGE
This procedure reduces repair time and cost. Use it
when any of the following components require
replacement, and the refrigeration system is operational
and leak-free.
•
Fan cycle control (air-cooled only)
•
Water regulating valve (water-cooled only)
•
High pressure cut-out control
B. Change the vacuum pump oil.
•
High side service valve
C. Pull vacuum to 500 microns. Break the vacuum
with dry nitrogen and sweep the system.
Pressurize to a minimum of 5 psi.
•
Low side service valve
A. Pull vacuum to 1000 microns. Break the vacuum
with dry nitrogen and sweep the system.
Pressurize to a minimum of 5 psi.
Important
D. Change the vacuum pump oil.
This is a required in-warranty repair procedure.
E. Pull vacuum to 250 microns. Run the vacuum
pump for 1/2 hour on self-contained models, 1
hour on remotes.
1. Disconnect power to the ice machine.
NOTE: You may perform a standing vacuum test to
make a preliminary leak check. You should use an
electronic leak detector after system charging to be sure
there is no leak.
11. Charge the system with the proper refrigerant to the
nameplate charge.
12. Operate the ice machine for one hour. Then, check
the pressure drop across the suction line filter-drier.
A. If the pressure drop is less than 1 psi, the filterdrier should be adequate for complete cleanup.
B. If the pressure drop exceeds 1 psi, change the
suction line filter-drier and the liquid line drier.
Repeat until the pressure drop is acceptable.
13. Operate the ice machine for 48-72 hours. Then,
remove the suction line drier and change the liquid
line drier.
14. Follow normal evacuation procedures.
2. Follow all manufacturer’s instructions supplied with
the pinch-off tool. Position the pinch-off tool around
the tubing as far from the pressure control as
feasible. (See the figure on next page.) Clamp down
on the tubing until the pinch-off is complete.
! Warning
Do not unsolder a defective component. Cut it out of
the system. Do not remove the pinch-off tool until
the new component is securely in place.
3. Cut the tubing of the defective component with a
small tubing cutter.
4. Solder the replacement component in place. Allow
the solder joint to cool.
5. Remove the pinch-off tool.
6. Re-round the tubing. Position the flattened tubing in
the proper hole in the pinch off tool. Tighten the
wingnuts until the block is tight and the tubing is
rounded. (See the drawing on next page.)
NOTE: The pressure controls will operate normally once
the tubing is re-rounded. Tubing may not re-round
100%.
Part No. 80-1100-3
7-55
Refrigeration System
Section 7
SV1406
Figure 7-18. Using Pinch-Off Tool
7-56
Part No. 80-1100-3
Section 7
Refrigeration System
TOTAL SYSTEM REFRIGERANT CHARGES
FILTER-DRIERS
The filter-driers used on Manitowoc ice machines are
manufactured to Manitowoc specifications.
The difference between Manitowoc driers and off-theshelf driers is in filtration. Manitowoc driers have dirtretaining filtration, with fiberglass filters on both the inlet
and outlet ends. This is very important because ice
machines have a back-flushing action which takes place
during every harvest cycle.
These filter-driers have a very high moisture removal
capability and a good acid removal capability.
The size of the filter-drier is important. The refrigerant
charge is critical. Using an improperly sized filter-drier
will cause the ice machine to be improperly charged with
refrigerant.
Listed below are the recommended O.E.M. field
replacement driers:
Model
Self-Contained Air
and Water Cooled
Q200 /Q280/Q320
Q370/Q420/Q450
Q600/Q800/Q1000
Remote Air Cooled
Q450/Q600
Q800/Q1000
All Condenser
Type
Q1300/Q1600
Q1800
Suction Filter
Drier
Size
UK-032S
Important
This information is for reference only. Refer to the
ice machine serial number tag to verify the system
charge. Serial plate information overrides
information listed on this page.
Series
Q200
Q210
Q280
Q320
Q370
End
Connection
Size
Part
Number
1/4"
89-3025-3
Q420/Q450
Q600
UK-083S
3/8"
89-3027-3
Q800
UK-083S
3/8"
89-3027-3
Q1000
UK-165S
5/8"
89-3028-3
Suction Filter used when cleaning up severely contaminated systems
Important
Driers are covered as a warranty part. The drier
must be replaced any time the system is opened for
repairs.
Q1300
Q1600
Q1800
Version
Air-Cooled
Water-Cooled
Air-Cooled
Water-Cooled
Air-Cooled
Water-Cooled
Air-Cooled
Water-Cooled
Air-Cooled
Water-Cooled
Air-Cooled
Water-Cooled
Remote
Air-Cooled
Water-Cooled
Remote
Air-Cooled
Water-Cooled
Remote
Air-Cooled
Water-Cooled
Remote
Air-Cooled
Water-Cooled
Remote
Water-Cooled
Remote
Air-Cooled
Water-Cooled
Remote
Charge
18 oz.
15 oz.
15 oz
11 oz
18 oz
15 oz
20 oz.
16 oz.
20 oz.
17 oz.
24 oz.
22 oz.
6 lb.
28 oz.
22 oz.
8 lb.
36 oz.
25 oz.
8 lb.
38 oz.
32 oz.
9.5 lb.
48 oz.
44 oz.
12.5 lb. *
46 oz.
15 lb.*
56 oz.
46 oz.
15 lb.*
*For remote line sets with lengths between 50' and 100' refer to
chart on Page 2-13
NOTE: All ice machines on this list are charged using
R-404A refrigerant.
Part No. 80-1100-3
7-57
Refrigeration System
Section 7
REFRIGERANT DEFINITIONS
Reclaim
Recover
To reprocess refrigerant to new product specifications
(see below) by means which may include distillation. A
chemical analysis of the refrigerant is required after
processing to be sure that product specifications are
met. This term usually implies the use of processes and
procedures available only at a reprocessing or
manufacturing facility.
To remove refrigerant, in any condition, from a system
and store it in an external container, without necessarily
testing or processing it in any way.
Recycle
To clean refrigerant for re-use by oil separation and
single or multiple passes through devices, such as
replaceable core filter-driers, which reduce moisture,
acidity and particulate matter. This term usually applies
to procedures implemented at the field job site or at a
local service shop.
Chemical analysis is the key requirement in this
definition. Regardless of the purity levels reached by a
reprocessing method, refrigerant is not considered
“reclaimed” unless it has been chemically analyzed and
meets ARI Standard 700 (latest edition).
New Product Specifications
This means ARI Standard 700 (latest edition). Chemical
analysis is required to assure that this standard is met.
7-58
Part No. 80-1100-3
Section 7
Refrigeration System
REFRIGERANT RE-USE POLICY
3. Recovered or Recycled Refrigerant
Manitowoc recognizes and supports the need for proper
handling, re-use, and disposal of, CFC and HCFC
refrigerants. Manitowoc service procedures require
recapturing refrigerants, not venting them to the
atmosphere.
•
Must be recovered or recycled in accordance
with current local, state and federal laws.
•
It is not necessary, in or out of warranty, to reduce or
compromise the quality and reliability of your customers’
products to achieve this.
Must be recovered from and re-used in the same
Manitowoc product. Re-use of recovered or
recycled refrigerant from other products is not
approved.
•
Recycling equipment must be certified to ARI
Standard 740 (latest edition) and be maintained
to consistently meet this standard.
•
Recovered refrigerant must come from a
“contaminant-free” system. To decide whether
the system is contaminant free, consider:
Important
Manitowoc Ice, Inc. assumes no responsibility for
use of contaminated refrigerant. Damage resulting
from the use of contaminated, recovered, or
recycled refrigerant is the sole responsibility of the
servicing company.
– Type(s) of previous failure(s)
– Whether the system was cleaned, evacuated
and recharged properly following failure(s)
Manitowoc approves the use of:
– Whether the system has been contaminated
by this failure
1. New Refrigerant
•
– Compressor motor burnouts and improper
past service prevent refrigerant re-use.
Must be of original nameplate type.
2. Reclaimed Refrigerant
•
Must be of original nameplate type.
•
Must meet ARI Standard 700 (latest edition)
specifications.
Part No. 80-1100-3
– Refer to “System Contamination Cleanup” to
test for contamination.
4. “Substitute” or “Alternative” Refrigerant
•
Must use only Manitowoc-approved alternative
refrigerants.
•
Must follow Manitowoc-published conversion
procedures.
7-59
Refrigeration System
HFC REFRIGERANT QUESTIONS AND ANSWERS
Manitowoc uses R-404A and R-134A HFC refrigerants
with ozone depletion potential (ODP) factors of zero
(0.0). R-404A is used in ice machines and reach-in
freezers and R-134A is used in reach-in refrigerators.
1. What compressor oil does Manitowoc require for
use with HFC refrigerants?
Manitowoc products use Polyol Ester (POE) type
compressor oil. It is the lubricant of choice among
compressor manufacturers.
2. What are some of the characteristics of POE oils?
They are hygroscopic, which means they have the
ability to absorb moisture. POE oils are 100 times
more hygroscopic than mineral oils. Once moisture
is absorbed into the oil, it is difficult to remove, even
with heat and vacuum. POE oils are also excellent
solvents, and tend to “solvent clean” everything
inside the system, depositing material where it is not
wanted.
3. What do these POE oil characteristics mean to me?
You must be more exacting in your procedures. Take
utmost care to prevent moisture from entering the
refrigeration system. Refrigeration systems and
compressors should not be left open to the
atmosphere for more than 15 minutes. Keep oil
containers and compressors capped at all times to
minimize moisture entry. Before removing the
system charge to replace a faulty component, be
sure you have all of the needed components at the
site. Remove new system component plugs and
caps just prior to brazing. Be prepared to connect a
vacuum pump immediately after brazing.
7-60
Section 7
4. Are there any special procedures required if a POE
system is diagnosed with a refrigerant leak?
For systems found with positive refrigerant system
pressure, no special procedures are required.
For systems found without any positive refrigerant
pressure, assume that moisture has entered the
POE oil. After the leak is found and repaired, the
compressor oil must be changed. The compressor
must be removed and at least 95% of the oil drained
from the suction port of the compressor. Use a
“measuring cup” to replace the old oil with exactly
the same amount of new POE oil, such as Mobil
EAL22A.
Remember, care must be taken to prevent moisture
from getting into the refrigeration system during
refrigeration repairs.
5. How do I leak-check a system containing HFC
refrigerant?
Use equipment designed for HFC detection. Do not
use equipment designed for CFC detection. Consult
leak detection equipment manufacturers for their
recommendations. Also, standard soap bubbles will
work with HFC refrigerants.
6. Does Manitowoc use a special liquid line filter-drier
with HFC refrigerants?
Yes. Manitowoc uses an ALCO “UK” series filterdrier for increased filtration and moisture removal.
During a repair, Manitowoc recommends installing
the drier just before hooking up a vacuum pump.
Continued on next page …
Part No. 80-1100-3
Section 7
7. Is other special equipment required to service HFC
refrigerants?
No. Standard refrigeration equipment such as
gauges, hoses, recovery systems, vacuum pumps,
etc., are generally compatible with HFC refrigerants.
Consult your equipment manufacturer for specific
recommendations for converting existing equipment
to HFC usage. Once designated (and calibrated, if
needed) for HFC use, this equipment should be
used specifically with HFC refrigerants only.
Part No. 80-1100-3
Refrigeration System
8. Do I have to recover HFC refrigerants?
Yes. Like other refrigerants, government regulations
require recovering HFC refrigerants.
9. Will R-404A or R-134A separate if there is a leak in
the system?
No. Like R-502, the degree of separation is too small
to detect.
10. How do I charge a system with HFC refrigerant?
The same as R-502. Manitowoc recommends
charging only liquid refrigerant into the high side of
the system.
7-61
Refrigeration System
Section 7
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7-62
Part No. 80-1100-3
Section 7
Refrigeration System
THIS PAGE INTENTIONALLY LEFT BLANK
Part No. 80-1100-3
7-63
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