Manitowoc | CVD1375 | Service manual | Manitowoc CVD1375 Service manual

Q Model
QuietQube® Ice Machines
with CVD® Technology
Models Q0600C/Q0800C/Q1000C
Q1400C/QDUALC
IB0600C/IB0800C/IB1000C
Service
Manual
Thank you for selecting a Manitowoc Ice Machine, the dependability leader in ice making equipment and related products.
With proper installation, care and maintenance, your new Manitowoc Ice Machine will provide you with many years of
reliable and economical performance.
This manual is updated as new information and models
are released. Visit our website for the latest manual.
www.manitowocice.com
Part Number 80-1206-3
5/2005
Safety Notices
Procedural Notices
As you work on a QuietQube®-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 QuietQube®-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.
Read These Before Proceeding:
! Caution
! 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.
Proper installation, care and maintenance are
essential for maximum ice production and troublefree operation of you Manitowoc Ice Machine.
Read and understand this manual. It contains
valuable care and maintenance information. If you
enounter problems not covered by this manual, do
not proceed, contact Manitowoc Ice, Inc. We will be
happy to provide assistance.
Important
Routine adjustments and maintenance procedures
outlined in this manual are not covered by the
warranty.
We reserve the right to make product improvements at any time.
Specifications and design are subject to change without notice.
Table of Contents
Section 1
General Information
Model Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Read a Model Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Condensing Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ice Cube Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model/Serial Number Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Owner Warranty Registration Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty Coverage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Labor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Authorized Warranty Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1-1
1-1
1-1
1-2
1-3
1-3
1-3
1-3
1-3
1-3
1-3
1-3
1-3
Section 2
Installation Instructions
Ice Machine Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q0600C/Q0800C/Q1000C Ice Machines . . . . . . . . . . . . . . . . . . . . . . . . . . .
IB0800C Ice Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IB0600c Ice Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IB1000C Ice Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SU1000C Ice Machines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q1400C Ice Machines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
QDUALC Ice Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Condensing Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CVD0675/CVD0875/CVD1075/CVD1285/CVD1375/CVD1475 Air-Cooled .
CVD1875/CVD2075 Air-Cooled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CVD1476 Water-Cooled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Location of Ice Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ice Machine Head Section Clearance Requirements . . . . . . . . . . . . . . . . . . . .
Stacking Two Ice Machines on a Single Storage Bin . . . . . . . . . . . . . . . . . . . .
Securing the Ice Machine to the Dispenser
IB0600C/IB0800C/IB1000C Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical ICe Beverage on a Dispenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Location of CVD Condensing Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Condensing Unit Clearance Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Condensing Unit Heat of Rejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leveling the Ice Storage Bin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air-Cooled Baffle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse/Circuit Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minimum Circuit Ampacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Part No. 80-1206-3
2-1
2-1
2-1
2-1
2-1
2-2
2-2
2-2
2-3
2-3
2-3
2-3
2-4
2-4
2-4
2-4
2-5
2-6
2-6
2-6
2-7
2-7
2-8
2-8
2-8
2-8
2-8
1
Table of Contents (continued)
Electrical Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
QuietQube® Ice Machine Head Section Electrical Wiring Connections . . . . .
QuietQube® Ice Machine Head Section 115/1/60 or 208-230/1/60 . . . . . . .
QuietQube® Ice Machine Head Section 230/1/50 . . . . . . . . . . . . . . . . . . . . .
For United Kingdom Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Electrical Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CVD Condensing Unit
208-230/1/60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
208-230/3/60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
230/1/50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ice Machine Head Section Water Supply and Drains . . . . . . . . . . . . . . . . . . . .
Potable Water Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Potable Water Inlet Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Drain Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Cooled Condenser Water Supply and Drains . . . . . . . . . . . . . . . . . . . . .
Condenser Water Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Cooled Condenser Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Condensing Unit Drain Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigeration System Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Usage With Non-Manitowoc Condensing Units . . . . . . . . . . . . . . . . . . . . . . .
Refrigeration Line Set Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A. Line Set Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B. Line Set Rise or Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C. Suction Line Oil Traps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic Bin Thermostat Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-9
2-10
2-10
2-10
2-10
2-11
Component Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ice Machine Head Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CVD Condensing Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operational Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ice Thickness Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Harvest Sequence Water Purge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interior Cleaning and Sanitizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manitowoc’s Patented Cleaning or Sanitizing Technology . . . . . . . . . . . . . .
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 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal from Service/Winterization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CVD 1476 Water Cooled Condensing Unit . . . . . . . . . . . . . . . . . . . . . . . . . .
AuCS Accessory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1
3-1
3-3
3-4
3-4
3-4
3-5
3-5
3-6
3-6
3-6
3-7
3-8
3-8
3-9
3-10
3-20
3-20
3-20
3-20
2-11
2-11
2-11
2-12
2-12
2-12
2-12
2-13
2-13
2-13
2-13
2-14
2-14
2-15
2-15
2-15
2-15
2-16
2-21
2-21
Section 3
Maintenance
2
Part No. 80-1206-3
Table of Contents (continued)
Section 4
Ice Machine Sequence of Operation
Q0600C/IB0600C/Q0800C/IB0800C/Q1000C/IB1000C/SU1000C . . . . . . . . . . .
Initial Start-Up or Start-Up After Automatic Shut-Off . . . . . . . . . . . . . . . . . . .
Freeze Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Harvest Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Shut-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q1400C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Initial Start-Up or Start-Up After Automatic Shut-Off . . . . . . . . . . . . . . . . . . .
Freeze Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Harvest Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Shut-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
QDUALC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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
4-3
4-3
4-4
4-4
4-4
4-4
4-5
Section 5
Water System Ice Making Sequence of Operation
Q0600C/IB0600C/Q0800C/IB0800C/Q1000C/IB1000C/QDUALC . . . . . . . . . . .
Initial Start-Up or Start-Up After Automatic Shut-Off . . . . . . . . . . . . . . . . . . .
Freeze Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Inlet Valve Safety Shut-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Harvest Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Shut-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q1400C/SU1000C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Initial Start-Up or Start-Up After Automatic Shut-Off . . . . . . . . . . . . . . . . . . .
Freeze Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Harvest Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Shut-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-1
5-1
5-1
5-1
5-2
5-2
5-3
5-3
5-3
5-4
5-4
Energized Parts Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q0600C/IB0600C/Q0800C/IB0800C/Q1000C/IB1000c/SU1000C . . . . . . . .
Q1400C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
QDUALC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Diagram Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ice Machine Head Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ice Machine Head Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Condensing Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic Control Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1
6-1
6-2
6-3
6-4
6-4
6-5
6-6
6-10
6-12
Section 6
Electrical System
Part No. 80-1206-3
3
Table of Contents (continued)
Component Specifications and Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic Bin Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bin Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ICE/OFF/CLEAN Toggle Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How The Probe Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 Water Level Control Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnosing An Ice Machine That Will Not Run . . . . . . . . . . . . . . . . . . . . . . . . .
Ice Machine Head Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnosing A Condensing Unit That Will Not Run . . . . . . . . . . . . . . . . . . . . . .
Condensing Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compressor Electrical Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-13
6-13
6-14
6-14
6-16
6-16
6-18
6-19
6-19
6-20
6-22
6-22
6-22
6-22
6-22
6-23
6-26
6-26
6-26
6-26
6-27
QuietQube® Tubing Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q0600C/Q0800C/Q1000C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IB0600C/IB0800C/IB1000C/SU1000C . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Q1400C/QDUALC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigeration System Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigeration System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Before Beginning Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ice Production Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation/Visual Inspection Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water System Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ice Formation Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Analyzing Discharge PressureDuring Freeze or Harvest Cycle . . . . . . . . . .
Analyzing Suction Pressure During Freeze Cycle . . . . . . . . . . . . . . . . . . . . .
Analyzing Freeze Cycle Suction Line Temperature . . . . . . . . . . . . . . . . . . .
Cool Vapor Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigeration Component Diagnostic Chart . . . . . . . . . . . . . . . . . . . . . . . . . .
Headmaster Control Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure Control Specifications and Diagnostics . . . . . . . . . . . . . . . . . . . . . .
Water Regulating Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fan Cycle Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Pressure Cutout (LPCO) Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High Pressure Cut-Out (HPCO) Control . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-1
7-1
7-2
7-3
7-4
7-4
7-4
7-6
7-6
7-7
7-7
7-8
7-10
7-15
7-16
7-18
7-19
7-20
7-23
7-27
7-27
7-27
7-28
7-28
Section 7
Refrigeration System
4
Part No. 80-1206-3
Table of Contents (continued)
Cycle Time/24 Hour Ice Production/Refrigerant Pressure Charts . . . . . . . . .
Q0600C/CVD0675 Series Remote Air Cooled . . . . . . . . . . . . . . . . . . . . . . .
IB0600C/CVD0675 Series Remote Air Cooled . . . . . . . . . . . . . . . . . . . . . . .
Q0800C/CVD0875 Series Remote Air Cooled . . . . . . . . . . . . . . . . . . . . . . .
IB0800C/CVD0875 Series Remote Air Cooled . . . . . . . . . . . . . . . . . . . . . . .
Q1000C/CVD1075/CVD1285 Series Remote Air Cooled . . . . . . . . . . . . . . .
IB1000C/CVD1075/CVD1285 Series Remote Air Cooled . . . . . . . . . . . . . .
SU1000C/CVD1075/CVD1285 Series Remote Air Cooled . . . . . . . . . . . . . .
Q1400C/CVD1475 Series Remote Air Cooled . . . . . . . . . . . . . . . . . . . . . . .
Q1400C/CVD1476 Series Remote Water Cooled . . . . . . . . . . . . . . . . . . . .
QDUALC/CVD1875 Series Remote Air Cooled . . . . . . . . . . . . . . . . . . . . . .
QDUALC/CVD2075 Series Remote Air Cooled . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Recovery/Evacuation and Recharging . . . . . . . . . . . . . . . . . . . . .
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Recovery Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charging Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Contamination Clean-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing Pressure Controls Without Removing Refrigerant Charge . . . . .
Filter-Driers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total System Refrigerant Charges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Re-Use Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Part No. 80-1206-3
7-29
7-30
7-30
7-31
7-31
7-32
7-32
7-33
7-34
7-34
7-35
7-35
7-36
7-36
7-36
7-37
7-38
7-38
7-41
7-43
7-44
7-44
7-45
5
Table of Contents (continued)
6
Part No. 80-1206-3
Section 1
General Information
Model Numbers
How to Read a Model Number
This manual covers the following models:
Ice Machine Head Section
QR0670C
QD0672C
QY0674C
IB0624YC
IB0622DC
QR0870C
QD0872C
QY0874C
IB0824YC
IB0822DC
QR1070C
QD1072C
QY1074C
IB1024YC
IB1022DC
SU1024YC/SerVend
UC300 Dispenser
QR1470C
QD1472C
QY1474C
QRDUALC
QDDUALC
QYDUALC
CVD® Condensing Unit*
9 REMOTE
AIR-COOLED
CVD675
CVD675
CVD875
CVD875
CVD1075
CVD1285
# CUBE SIZE
CONDENSER TYPE
0
1
2
3
4
5
AIR-COOLED
WATER-COOLED
AIR-COOLED
WATER-COOLED
AIR-COOLED
WATER-COOLED
REGULAR
REGULAR
DICE
DICE
HALF-DICE
HALF-DICE
Q Y 0674 C
ICE MACHINE
MODEL
ICE MACHINE
SERIES
ICE CUBE SIZE
R REGULAR
D DICE
Y HALF DICE
CONDENSER TYPE
A
W
N
C
SELF-CONTAINEDAIR-COOLED
SELF-CONTAINEDWATER-COOLED
REMOTE AIR-COOLED
CVD REMOTE AIR-COOLED
SV3106
Remote Condensing Unit
CVD1075
CVD1285
CVD1375
CVD1475
CVD1476
CVD1875
CVD2075
CVD 0675 3
CONDENSING
UNIT MODEL
CONDENSING
UNIT SERIES
3 PHASE
SV3107
Ice Cube Sizes
For 3 phase electrical option: add the number “3” to the
end of model number (CVD06753).
! Warning
PERSONAL INJURY POTENTIAL
Do not operate equipment that has been misused,
abused, neglected, damaged, or altered/modified
from that of original manufactured specifications.
SV3105
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
Important
! Warning
When installing with non-Manitowoc ice storage
systems or Manitowoc F style bins. Manitowoc
QuietQube® ice machines require the ice storage
bin, to incorporate an ice deflector.
Prior to using a non-Manitowoc ice storage system
with Manitowoc ice machines, contact the
manufacturer to assure their ice deflector is
compatible with Manitowoc ice machines.
Part No. 80-1206-3
The ice machine sequence of operation for QuietQube®
ice machines will differ. Verify the correct sequence of
operation is followed for the model you are working on.
Important
The SU1024YC is designed for installation on a SerVend
UC-300 dispenser only. Refer to the SerVend UC-300
Installation, Use and Care Manual for dimensions,
installation requirements and additional cleaning/
sanitizing procedures.
1-1
General Information
Section 1
Model/Serial Number Location
These numbers are required when requesting
information from your local Manitowoc distributor,
service representative, or Manitowoc Ice, Inc.
The model and serial number are listed on the OWNER
WARRANTY REGISTRATION CARD. They are also
listed on the MODEL/SERIAL NUMBER DECAL affixed
to the ice machine head section and condensing unit.
Both model/serial numbers must be referenced to obtain
warranty or service information.
Q0600C/Q0800C/Q1000C
Condensing Unit
MODEL /
SERIAL
NUMBERS
DECAL
(ICE
MACHINE)
SV1600A
INSIDE FRONT COVER
(ICE MACHINE HEAD
SECTION)
SV1746
MODEL / SERIAL NUMBERS DECAL
(CVD CONDENSING UNIT)
MODEL /
SERIAL
NUMBERS
DECAL
(BIN)
CVD1476
SV1749
Q1400C/QDUALC
MODEL / SERIAL
NUMBERS DECAL
(RIGHT SIDE OF
ICE MACHINE
ELECTRICAL
CONTROL BOX)
MODEL / SERIAL
NUMBERS DECAL
(CVD CONDENSING
UNIT)
SV3077
SU1024YC/SerVend UC-300 Dispenser
IB0600C/IB0800C/IB1000C
SV3092
INSIDE FRONT COVER
(ICE MACHINE HEAD
SECTION)
1-2
SV1770A
SV3088
MODEL / SERIAL
NUMBERS DECAL
(ICE MACHINE HEAD
SECTION)
MODEL / SERIAL
NUMBERS DECAL
(ICE MACHINE HEAD
SECTION)
SV3003
Part No. 80-1206-3
Section 1
General Information
Owner Warranty Registration Card
EXCLUSIONS
GENERAL
The following items are not included in the ice machine’s
warranty coverage:
Warranty coverage begins the day the ice machine is
installed.
Important
Complete and mail the OWNER WARRANTY
REGISTRATION CARD as soon as possible to
validate the installation date.
If the OWNER WARRANTY REGISTRATION CARD is
not returned, Manitowoc will use the date of sale to the
Manitowoc Distributor as the first day of warranty
coverage for your new ice machine.
Warranty Coverage
GENERAL
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. Normal maintenance, adjustments and cleaning as
outlined in this manual.
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
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.
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.
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.
NOTE: If the dealer you purchased the ice machine from
is not authorized to perform warranty service; contact
your Manitowoc distributor or Manitowoc Ice, Inc. for the
name of the nearest authorized service representative.
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. 80-1206-3
SERVICE CALLS
Normal maintenance, adjustments and cleaning as
outlined in this manual are not covered by the warranty.
If you have followed the procedures listed in this manual,
and the ice machine still does not perform properly, call
your Local Distributor or the Service Department at
Manitowoc Ice, Inc.
1-3
General Information
Section 1
THIS PAGE INTENTIONALLY LEFT BLANK
1-4
Part No. 80-1206-3
Section 2
Installation Instructions
Ice Machine Dimensions
Q0600C/Q0800C/Q1000C ICE MACHINES
Ice Machine
Q0600C
Q0800C
Q1000C
Important
Dimension H
21.5 in (54.6 cm)
26.5 in (67.3 cm)
29.5 in (74.9 cm)
Failure to follow these installation guidelines may
affect warranty coverage.
IB0600C ICE MACHINE
22”
(55.8 CM)
24.5”
(62.23 CM)
30”
(76.2 CM)
13”
(33 CM)
3”
(7.62 CM)
H
8”
(20.3 CM)
21”
(54.6 CM)
22”
(56 CM)
19.5”
(48.9 CM)
5.5”
(14 CM)
3”
(7.62 CM)
10”
(25.4 CM)
4.5”
(11.4 CM)
SV1752
5.9”
(15 CM)
5.5”
(14 CM)
2.13”
(5.4 CM)
IB0800C ICE MACHINE
IB1000C ICE MACHINE
22”
(55.8 CM)
22”
(55.8 CM)
3”
(7.62 CM)
21.8”
(55.4 CM)
5.5”
(14 CM)
3”
(7.62 CM)
3”
(7.62 CM)
30.5”
(77.47 CM)
26”
(66 CM)
5.5”
(14 CM)
3”
(7.62 CM)
12.7”
(32.26 CM)
5.9”
(15 CM)
14”
(35.56 CM)
Part No. 80-1206-3
SV3093
14”
(35.56 CM)
5.13”
(13.03 CM)
26.5”
(67.31 CM)
8.25”
(21 CM)
8.25”
(21 CM)
17.25”
(243.81 CM)
5.9”
(15 CM)
SV3093
8.25”
(21 CM)
SV3093
14”
(35.56 CM)
2-1
Installation Instructions
Section 2
SU1000C ICE MACHINES
The SU1024YC is designed for installation on a SerVend
UC-300 dispenser only. Refer to the Servend UC-300
Installation Use and Care Manual for exterior
dimensions.
Q1400C ICE MACHINES
12”
(30.48 cm)
24.5”
(62.23 cm)
30”
(76.2 cm)
42”
(106.68 cm)
6.87”
(17.45 cm)
5.37”
(13.64 cm)
3.24”
(8.23 cm)
19”
(48.26 cm)
24”
(60.96 cm)
14.77”
(37.52 cm)
20.96”
(53.24 cm)
SV3003
21.21”
(53.87 cm)
2.02”
(5.13 cm)
SV1766
QDUALC ICE MACHINE
30”
(76.2 cm)
6.87”
(17.45 cm)
29.5”
(74.93 cm)
3.24”
(8.23 cm)
5.37”
(13.64 cm)
2.09”
(5.31 cm)
1.68”
(4.27 cm)
2”
(5.08 cm)
26.54”
(67.4 cm)
26.76”
(67.97 cm)
2.02”
(5.14 cm)
SV1766
19.77”
(50.22 cm)
2-2
Part No. 80-1206-3
Section 2
Installation Instructions
Condensing Unit Dimensions
CVD1476
CVD0675/CVD0875/CVD1075/CVD1285/CVD1375/CVD1475
Water-Cooled
Air-Cooled
24.13”
(53.7 CM)
34”
(86.4 CM)
21.87”
(55.5 CM)
24.53”
(62.3 CM)
25.75”
(65.4 CM)
20.64”
(52.4 CM)
14.5”
(36.8 CM)
FRONT VIEW
14.5”
(36.8 CM)
4.26”
(10.8 CM)
9.5”
(24.1 CM)
12.6”
(32 CM)
10.75”
(27.3 CM)
8.54”
(21.6 CM)
8.70”
(22.1 CM)
SV1758
SV3076
CVD1875/CVD2075
Air-Cooled
26”
(66.04 CM)
52.5”
(133.35 CM)
11.5”
(28.58 CM)
6.5”
(16.5 CM)
26”
(66.04 CM)
10.25”
(26.04 CM)
13.5”
(34.3 CM)
10”
(25.4 CM)
FRONT VIEW
14.5”
(36.8 CM)
8”
(20.32 CM)
5”
(12.7 CM)
9”
10”
5.25”
(13.34 CM)
Part No. 80-1206-3
PT1307
2-3
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.
Ice Machine Head Section Clearance
Requirements
Q0600C/Q0800C/Q1000C/Q1400C/QDUALC:
Top/Sides 5” (127 mm) is recommended for efficient
operation and servicing. There is no minimum clearance
required.
Back 1” (25.4 mm) required when routing electrical inlet,
water inlet and refrigeration tubing out of the top of the
unit.
5” (127 mm) required when routing all connections out
the back.
IB0600C/IB0800C/IB1000C:
Top 2” (51 mm) required clearance for cleaning
procedures and servicing.
Back 5” (127 mm) required when routing all connections
out the back.
Sides 8” (203 mm) required for servicing.
SU1000C/SerVend UC-300:
Top 40” (101.6 cm) required clearance for cleaning
procedures and servicing.
Back 12” (30.5 cm) required for cleaning procedures
and servicing.
! Caution
The ice machine head section 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”.
Section 2
Stacking Two Ice Machines on a Single
Storage Bin
Q0600C/Q0800C/Q1000C Ice Machines:
A stacking kit is required for stacking two ice machines.
Installation instructions are supplied with the stacking kit.
IB0600C/IB0800C/IB1000C/Q1400C/QDUAL:
Ice Beverage, Q1400C and QDUAL ice machines
cannot be stacked. However an adapter is available that
allows two Q1400C or QDUALC ice machines to be
placed side by side on a 60” Manitowoc F style bin.
Securing the Ice Machine to the Dispenser
IB0600C/IB0800C/IB1000C Only
Important
Manitowoc Ice/Beverage Ice Machines require an
adapter for mounting. Adapters are not included
with the ice machine, dispenser or bin and must be
ordered separately. When a non-Manitowoc adapter
is used, verify the adapter is compatible with
Manitowoc Ice/Beverage Ice Machines prior to
installation.
Standard with IB ice machines and packaged in head
section is the dispenser thermostat kit, K-00209. It is
required that this kit be installed with all IB ice machines.
The thermostat kit must be installed before the adapter
and ice machine head section is installed.
The purpose of the thermostat kit is to reduce machine
overfill and condensation problems in high humidity
locations. It is recommended that bin level control be
used on all dispenser applications with timed agitation to
allow for better agitation in the bin.
The ice machine and adapter plate must be secured to
the dispenser to prevent tipping.
•
Two holes are located in the front bottom rail of the
ice machine, to allow attachment to the adapter
plate.
•
The adapter cover must be secured to the dispenser
to prevent ice from dislodging the cover during
agitation.
! Warning
The ice machine and adapter plate must be secured
to the dispenser to prevent tipping.
2-4
Part No. 80-1206-3
Section 2
Installation Instructions
TYPICAL ICE BEVERAGE ON A DISPENSER
Important
DO NOT REMOVE the label on bin adapters. The
retainer clips and brackets must be used.
1. Install bin level thermostat bracket.
2. Set adapter on dispenser. Position the adapter so
that the front flange of the adapter will be up against
the front lip of the dispenser. Adapter may have to
be moved towards the back of the dispenser.
3. Using the slotted holes in the adapter as a template,
drill four (4) 9/64” diameter holes at the bottom of the
slots. Note: Do not drill deeper than 1/4” past the
sheet metal. Use a drill stop!
4. Fasten the adaptor to dispenser using the four (4) #8
screws supplied with the adaptor kit.
5. Set the ice machine on top of the adapter. Align
holes in ice machine front angle with threaded
bosses on the adapter.
BIN
COVER
6. Secure the ice machine to the adaptor with two (2)
#8-32 screws supplied with the kit.
7. Set the bin cover on the adapter, move backwards
until the cover hits the stop, and lower the plastic
cover insuring that the latch locks.
8. To remove the bin cover, twist the knob, lift up, and
pull forward.
PLACE A LARGE FILLET OF
FOOD GRADE RTV INSIDE
EDGE ALONG BOTH SIDES
WHERE ADAPTER
TOUCHES BIN
SV3121
ADAPTER
SCREWS
SV3120
DEFLECTOR MUST
STAY IN PLACE
SV3122
Part No. 80-1206-3
2-5
Installation Instructions
Location of CVD Condensing Unit
The location selected for the CVD Condensing Unit must
meet the following criteria. If any of these criteria are not
met, select another location.
•
The air temperature must be at least -20°F (-28.9°C)
but must not exceed 130°F (54.4°C).
•
CVD1476 Only - The air temperature must be at
least 50°F (10°C) but must not exceed 110°F (43°C).
•
CVD1875/CVD2075 Only - The air temperature must
be at least -20°F (-28.9°C) but must not exceed
120°F (48.9°C).
•
The location must not allow exhaust fan heat and/or
grease to enter the condenser.
•
The location must not obstruct airflow through or
around the condensing unit. Refer to the chart below
for clearance requirements.
Section 2
Condensing Unit Heat of Rejection
Series
Condensing Unit
CVD675
CVD875
CVD1075
CVD1285
CVD1475
CVD1476
CVD1875
CVD2075
Heat of Rejection*
Air Conditioning**
Peak
9,000
13,900
12,400
19,500
16,000
24,700
19,000
28,000
24,000
35,500
24,000
35,500
28,000
42,000
39,000
53,000
B.T.U./Hour
Because the heat of rejection varies during the ice making cycle,
the figure shown is an average.
QuietQube® ice machine head sections add an
insignificant amount of load to a conditioned space.
Condensing Unit Clearance Requirements
Top/Sides
There is no minimum clearance required, although 6”
(152 mm) is recommended for efficient operation and
servicing only.,
Front/Back
48” (122 cm)
CVD1476 ONLY
Top - 5” (127 mm) is recommended for efficient
operation and servicing only.
Front/Back/Sides - 12” (305 mm)
2-6
Part No. 80-1206-3
Section 2
Installation Instructions
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
Air Baffle
SV1606
Leveling Leg and Foot
Part No. 80-1206-3
2-7
Installation Instructions
Section 2
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.
VOLTAGE
The maximum allowable voltage variation is ±10% of the
rated voltage at ice machine start-up (when the electrical
load is highest).
MINIMUM CIRCUIT AMPACITY
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 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.
2-8
Part No. 80-1206-3
Section 2
Installation Instructions
Electrical Requirements
QuietQube® Ice Machine Head Section
Ice Machine
Q0600C IB0600C
Q0800C IB0800C
Q1000C IB1000C
SU1000C (UC-300 Dispenser)
Q1400C QDUALC
Voltage
Phase
Cycle
Maximum Fuse/
Circuit Breaker
Total Amps
115/1/60
208-230/1/60
230/1/50
15 amp
15 amp
15 amp
1.1
0.6
0.6
Important
The QuietQube® Ice Machine Head Section and
CVD Condensing Unit are wired independently from
each other.
CVD® Condensing Unit
Condensing Unit
CVD0675
CVD0875
CVD1075
CVD1285
CVD1475
CVD1476
CVD1875
CVD2075
Part No. 80-1206-3
Voltage Phase
Cycle
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
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
208-230/1/60
208-230/3/60
230/1/50
208-230/1/60
208-230/3/60
230/1/50
Maximum Fuse/Circuit
Breaker
15
15
15
20
15
20
25
20
25
25
20
25
35
25
35
30
20
40
30
40
50
40
50
Minimum Circuit Amps
9.6
7.3
9.0
11.7
8.2
11.3
15.6
10.6
13.8
14.7
10.6
11.7
19.6
14.1
19.8
15.3
10.8
24.3
16.1
23.2
27.1
19.9
29.9
2-9
Installation Instructions
Section 2
QuietQube® Ice Machine Head Section Electrical Wiring Connections
! 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.
Though wire nuts are shown in the drawings, the ice
machine field wiring connections may use either
wire nuts or screw terminals.
QUIETQUBE® ICE MACHINE HEAD SECTION
115/1/60 OR 208-230/1/60
QUIETQUBE® ICE MACHINE HEAD SECTION
230/1/50
L1
L1
N
N
GROUND
GROUND
L1
L1
N=115V
OR
L2=208-230V
GROUND
ICE MACHINE
CONNECTIONS
TO SEPARATE
FUSE/BREAKER.
DISCONNECT ALL
POLES.
SV1191
GROUND
ICE MACHINE
CONNECTIONS
SV1258
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.
2-10
Part No. 80-1206-3
Section 2
Installation Instructions
Remote Electrical Wiring Connections
CVD CONDENSING UNIT
208-230/3/60
! 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.
Though wire nuts are shown in the drawings, the ice
machine field wiring connections may use either
wire nuts or screw terminals.
L1
L1
L2
L2
L3
L3
GROUND
CVD CONDENSING UNIT
208-230/1/60
CONDENSING
UNIT
CONNECTIONS
GROUND
TO SEPARATE
FUSE/BREAKER
SV1190
L1
L1
CVD CONDENSING UNIT
230/1/50
L2
L1
GROUND
L1
GROUND
N
CONDENSING UNIT
CONNECTIONS
TO SEPARATE
FUSE/BREAKER
SV1258
N
GROUND
CONDENSING UNIT
CONNECTIONS
GROUND
TO SEPARATE
FUSE/BREAKER.
DISCONNECT ALL
POLES.
SV1191
Part No. 80-1206-3
2-11
Installation Instructions
Ice Machine Head Section Water Supply
and Drains
POTABLE WATER SUPPLY
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.
Section 2
DRAIN CONNECTIONS
Follow these guidelines when installing drain lines to
prevent drain water from flowing back into the ice
machine and storage bin:
•
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. The ice machine drain requires an 18”
vent.
•
Drains must have a union or other suitable means to
allow in place disconnection from the ice machine
when servicing is required.
•
The SU1024YC is designed for installation on a
SerVend UC300 dispenser only. Refer to the
SerVend UC300 Installation, Use and Care Manual
for additional drain requirements.
•
A 3’ service loop or disconnect (union) must be
installed at the ice machine head section on Ice
Beverage models.
POTABLE WATER INLET LINES
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.
Float Valve - 80 psig (551.5 kPA)
Water Inlet Valve - 90 psig (620.4 kPA)
•
Install a water shut-off valve for ice making potable
water.
•
Insulate water inlet lines to prevent condensation.
2-12
Part No. 80-1206-3
Section 2
Installation Instructions
Water Cooled Condenser Water Supply and
Drains
CONDENSER WATER SUPPLY
Local water conditions may require treatment of the
water to inhibit scale formation, filter sediment, and
remove chlorine odor and taste.
WATER COOLED CONDENSER LINES
Follow these guidelines to install water lines:
•
Contact your distributor if your water pressure is
greater than 150 psig (1034 kPA). A special order
condensing unit is available that allows water
pressure up to 350 psig (2413 kPA).
•
Install a shutoff valve (inlet and outlet on cooling
tower or closed loop circuits) to allow isolation of the
water system.
•
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 8 psig (55 kPA) between
the condenser water inlet and outlet.
•
Water exiting the condenser must no exceed 110°F
(43.3°C).
CONDENSING UNIT DRAIN CONNECTIONS
The condensing unit drain is provided to remove any
condensate produced by the suction accumulator.
Condensate amounts will vary depending on
temperature and humidity.
•
The condensing unit must be level front to back and
side to side to allow the condensate to drain.
•
Drain lines must have a 1.5-inch drop per 5 feet of
run (2.5 cm per meter), and must not create traps.
•
Drain termination must meet applicable costs.
! Warning
Water pressure at the condenser cannot exceed
150 psig (1034 kPA) with the standard water
regulating valve. Contact your distributor if your
water pressure is greater than 150 psig (1034 kPA).
A special order condensing unit is available that
allows water pressure up to 350 psig (2413 kPA).
Part No. 80-1206-3
2-13
Installation Instructions
Section 2
Refrigeration System Installation
QuietQube®
Ice Machine
Q1000C
IB1000C
SU1000C/UC300
Q1400C
Q0600C
IB0600C
Q0800C
IB0800C
QDUALC
Remote Single
Circuit
Condenser
CVD1075
CVD1285
CVD1475
CVD1476
Factory Equipment Refrigeration Amounts
ICE MACHINE HEAD SECTION
Line Set*
RC-20
RC-30
RC-50
CVD675
CVD875
CVD875
RC-21
RC-31
RC-51
CVD1875
CVD2075
RC-22
RC-32
RC-52
Line Set
Suction Line
Liquid Line
Insulation
Thickness
RC 20/30/50
3/4 inch
(19.1 mm)
5/8 inch
(15.9 mm)
1/2 inch
(12.7 mm)
3/8 inch
(9.5 mm)
1/2”(13mm)
Suction Line
1/4” (7mm)
Liquid Line
7/8 inch
(22.2 mm)
5/8 inch
(15.9 mm)
3/4” (19mm)
Suction Line
1/4” (7mm)
Liquid Line
RC 21/31/51
RC 22/32/52
USAGE WITH NON-MANITOWOC
CONDENSING UNITS
Manitowoc CVD Condensing Units are specifically
designed for usage with a QuietQube® Ice Machine
Head Section. Non-Manitowoc condensing units will not
operate a QuietQube® Ice Machine Head Section.
SU1000C/Servend UC-300 Dispenser
Refrigeration system installation must meet the
requirements and follow the procedures listed in this
section.
! Warning
Installation of a QuietQube® Condensing Unit may
require the use of special equipment for placement.
Trained and qualified personnel are required for
proper rigging and lifting.
2-14
Q0600C/IB0600C/Q0800C/IB0800C/Q1000C/IB1000C/
SU1000C/Q1400C
Each ice machine head section ships from the factory
with a R-404A refrigerant charge appropriate for the
entire system operation. The serial tag on the ice
machine indicates the refrigerant charge. The refrigerant
charge is sufficient to operate the ice machine in
ambient temperatures between -20°F (-28.9°C) and
130°F (54.4°C)*. With line set lengths of up to 100 feet
(30.5 m).
*CVD1476: -50°F to 110°F (-46°C to 43°C)
QDUALC
Each QDUALC ice machine head section ships from the
factory with an R-404A refrigerant charge appropriate for
installations with up to 50’ of refrigeration tubing. The
serial tag on the ice machine indicates the refrigerant
charge. For line set runs longer than 50’ 1 lb. of
additional refrigerant must be added for each 10’ of line
set run. 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 feet (30.5 m).
! Warning
The ice machine head section contains the refrigerant
charge. Installation and brazing 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.
! Caution
Never add more than nameplate charge to the
refrigeration system for any application.
! Caution
The 60-month compressor warranty (including the
36-month labor replacement warranty) will not apply if
the Manitowoc Ice Machine and Manitowoc CVD
Condensing Unit are 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.
Part No. 80-1206-3
Section 2
Installation Instructions
Refrigeration Line Set Installation
B. LINE SET RISE OR DROP
GENERAL
Refrigeration line set installations consist of vertical and
horizontal line set distances between the ice machine
and the condensing unit. The following guidelines,
drawings and calculation methods must be followed to
assure proper oil return and CVD condensing unit/ice
machine operation
35’ (10.7 M)
MAX.
DISTANCE
! Warning
The following instructions are provided as a general
overview of a typical QuietQube® installation. Refer
to the Installation, Use and Care Manual for each
specific model for step by step installation
instructions.
Step 1 Verify Ice Machine and CVD Condensing
Unit Locations Are Within Guidelines.
Prior to installation of the ice machine head section and
CVD condensing unit be sure that the distance between
then is within the line set routing guidelines outlined in
this manual.
Roof/Wall Penetration
If required, cut a 3-inch (76.2 mm) circular hole in the
wall or roof for routing of refrigeration tubing. A qualified
person must perform all roof penetrations.
SV1751
35 feet (10.7 m) Rise: The maximum distance the CVD
condensing unit can be above the ice machine.
15’ (4.5 M)
MAX.
DISTANCE
Step 2 Route Refrigeration Tubing
Properly route refrigeration tubing between the ice
machine head section and the CVD condensing unit.
A. LINE SET LENGTH
100 feet (30.5 m) Length: The maximum measured
length the line set can be.
SV1750
15 feet (4.5 m) Drop: The maximum distance the CVD
condensing unit can be below the ice machine.
Important
QuietQube® ice machines will not function with line
sets greater than 100 feet (30.5 m). Do not attempt to
go beyond this distance and add refrigerant charge to
compensate!
Part No. 80-1206-3
2-15
Installation Instructions
Section 2
C. SUCTION LINE OIL TRAPS
! Caution
Do not form unwanted traps in refrigeration lines.
Never coil excess refrigeration tubing.
Service Loop
A service loop in the line set permits easy access to the
ice machine for cleaning and service.
A service loop is an installation requirement on Ice
Beverage Ice Machines. (IB0600C/IB0800C/IB1000C)
0 to 20 feet (0 to 6.1 m) Rise: The ice machine head
section has one oil trap built in which allows for a
maximum condenser rise of 20 feet (6.1 m) without
additional traps in the suction line.
21 to 35 feet (6.4 to 10.7 m) Rise: The suction line
requires an additional Oil Trap (“S” type) to be installed.
Install the trap as close as possible to midpoint between
the ice machine head section and CVD condensing unit.
S-Trap Kits are available from Manitowoc (refer to chart).
SERVICE LOOP
SV3088
21’ OR MORE
RISE
ADDITIONAL
TRAP KIT
REQUIRED
SV1751
•
The supplied service loop is an installation
requirement. Excess tubing length must be
sufficient to allow 180° rotation of the ice
machine.
•
A service loop is not considered an oil trap.
•
The service loop is not included when calculating
length, rise or drop of the tubing run.
•
Do not use hard rigid copper for the service loop.
! 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.
Step 3 Lengthening or Reducing Line Set Lengths
! Caution
SV1760
Manitowoc S-Trap Kit
Model
S-Trap Kit
Number
Tubing Size
Q0600C
IB0600C
Q0800C
IB0800C
K00172
5/8 inch
(15.9 mm)
Q1000C
IB1000C
SU1000C
Q1400C
K00166
3/4 inch
(19.1 mm)
QDUALC
K000164
7/8 inch
(22.2 mm)
2-16
Do not form unwanted traps in refrigeration lines.
Never coil excess refrigeration tubing.
When the line set required shortening or lengthening, do
so before connecting the line set to the ice machine
head section or the CVD condensing unit.
Part No. 80-1206-3
Section 2
Installation Instructions
Step 4 Connecting the line set.
To prevent oxidation of the copper, purge line set and
condensing unit with dry nitrogen while brazing.
Connect The Line Set To The Ice Machine Head
Section
! Warning
The ice machine head section contains refrigerant
charge. The ice machine head section contains three
(3) refrigeration valves that must remain closed until
proper installation of the line sets is completed.
The line set shut off valves at the back of the ice
machine must remain closed and be protected from heat
during the brazing process. Wrap the valves in a wet rag
or other type of heat sink prior to brazing. Cool braze
joint with water immediately after brazing to prevent heat
migration to the valve.
Connect The Line Set To The CVD Condensing Unit
The compressor oil rapidly absorbs moisture. Be
prepared to complete line set installation and start your
evacuation process in order to minimize the time the
compressor is exposed to the atmosphere. (Maximum
amount of time the system can be exposed to the
atmosphere is 15 minutes). The line set can be routed
for entry through the front or left side of the condensing
unit.
•
Remove knockout for preferred location.
•
Insert supplied plastic bushings in knockout holes to
prevent tubing from contacting sheet metal.
•
Use the supplied 90° elbows to route tubing.
•
Cut the tubing ends of the suction and liquid lines
and braze the line sets to the condensing unit.
SUCTION
FILTER
SUCTION
LINE
VALVES MUST REMAIN
CLOSED AND BE
PROTECTED FROM
HEAT WHEN BRAZING
(WRAP WITH WET RAG)
Q600C/Q800C/Q1000C
SHOWN
MINIMIZE THE TIME THE REFRIGERATION
SYSTEM IS EXPOSED TO THE ATMOSPHERE
(15 MINUTES MAXIMUM)
SV2085
SV1757
! Warning
The condensing unit ships from the factory
pressurized with a 50/50 mixture of nitrogen/helium.
Bleed off pressure from both suction and liquid line
access ports prior to cutting into refrigeration lines.
LIQUID
LINE
SUCTION
LINE
Part No. 80-1206-3
SV3077
CVD1476
2-17
Installation Instructions
Section 2
Step 5 Pressure Test and Evacuate The Line Set
and CVD Condensing Unit
Schrader valve core removal tools that allow for removal
and installation of the valve cores without removing
manifold gauge set hoses are recommended to
decrease the evacuation time.
Leave the line set shut off valves closed (front seated).
Pressure test the line sets and CVD condensing unit
with 150 psig of dry nitrogen. Add nitrogen at the line set
shut off valves located at the back of the ice machine.
Complete the pressure test, verify no leaks are present
and remove the nitrogen from the system before
connecting the vacuum pump. Connect a vacuum pump
to both of the line set shut off valves located at the back
of the ice machine head section. Evacuate to 250
microns (or less). To completely evacuate the CVD
condensing unit, continue the evacuation for 30 minutes
after reaching the 500 micron point.
Step 6 Open The Valves Prior To Starting The Ice
Machine.
A. Slowly backseat (open-turn counterclockwise)
the suction line shut off valve.
B. Slowly backseat (open-turn counterclockwise)
the liquid line shut off valve.
C. Slowly backseat (open-turn counterclockwise)
the receiver service valve.
NOTE: You will not hear refrigerant flow when the valves
are opened. Refrigerant will not flow until the toggle
switch is placed in the ice position and the liquid line
solenoid valve opens.
ALTERNATE CONNECTIONS AT
CONDENSING UNIT SCHRADER VALVES
USE ALLEN WRENCH TO OPEN
(TURN COUNTERCLOCKWISE)
LIQUID AND SUCTION LINE
SHUT OFF VALVES
SV1762
OPEN SUCTION AND LIQUID LINE SHUT OFF VALVES
Q0600C/Q0800C/Q1000C
SV2085
If required, the line set and condensing unit can be
evacuated from the schrader valves located in the CVD
condensing unit. Schrader valve core removal tools (that
allow for putting the cores back in without removing
vacuum pump hoses) must be used if evacuating from
the condensing unit side.
Isolate the vacuum pump from the line set shut off
valves and/or condensing unit access ports prior to
proceeding. Open refrigeration system shut off valves.
The suction line, liquid line and receiver service valves
are closed during shipment and installation.
USE ALLEN WRENCH TO OPEN
(TURN COUNTERCLOCKWISE)
LIQUID AND SUCTION LINE SHUT
OFF VALVES
SV1769C
OPEN SUCTION AND LIQUID LINE SHUT OFF VALVES
Q1400C/QDUALC
CONNECT
VACUUM PUMP TO
LINE SET SHUT
OFF VALVES
USE ALLEN WRENCH
TO OPEN (TURN
COUNTERCLOCKWISE)
LIQUID AND SUCTION
LINE SHUT OFF
VALVES
SV1757
2-18
SV3051
OPEN SUCTION AND LIQUID LINE SHUT OFF VALVES
IB0600C/IB0800C/IB1000C
Part No. 80-1206-3
Section 2
Installation Instructions
Verify O-ring in schrader valve caps are intact and
reinstall on shut off valves to prevent refrigerant leakage.
Replace shut off valve access caps and torque to the
following specifications.
Torque Value’s
Stem
18-20 ft. lbs.
Caps
12-15 ft. lbs.
Schrader Core
1.5-3 in. lbs.
Replace cap on receiver service valve and tighten.
Leak check the new line set connections at the ice
machine head section, condensing unit and S trap as
well as all factory joints throughout the entire system.
Disconnect power to the CVD condensing unit. Place the
ICE/OFF/CLEAN toggle switch into the ICE position.
This allows the low side and high side pressures to
equalize. Place the ICE/OFF/CLEAN toggle switch in the
OFF position. Connect power to the CVD condensing
unit and allow system to pump down.
Step 8 Insulation Requirements
To prevent condensation the entire suction line including
the shut-off valve must be insulated. All insulation must
be airtight and sealed at both ends.
The following insulation requirements prevent
condensation at 90°F (32.2°C) ambient 90% Relative
Humidity. If higher humidity is expected, increase
insulation thickness.
The entire suction line set, including the suction service
valve located on the back of the ice machine requires:
TURN
COUNTERCLOCKWISE
RECEIVER SERVICE VALVE CAP
(TURN COUNTERCLOCKWISE
TO REMOVE)
Step 7 Leak Check The Refrigeration System
SV1756
Open Receiver Service Valve
There is a liquid line solenoid valve at the outlet of the
receiver; refrigerant will not flow to the condensing unit
until the ice machine head section is started. Connect
power to both the ice machine head section and the
CVD condensing unit. Place the ICE/OFF/CLEAN toggle
switch into the ICE position, this will allow refrigerant to
enter the line set and condensing unit.
Suction Line
Liquid Line
Min. Insulation
Thickness
3/4 inch
(19.1 mm)
1/2 inch
(12.7 mm)
5/8 inch
(15.9 mm)
3/8 inch
(9.5 mm)
1/2”(13mm)
Suction Line
1/4” (7mm)
Liquid Line
7/8 inch
(22.2 mm)
5/8 inch
(15.9 mm)
Important
All refrigeration valve caps must be reinstalled to
prevent future refrigeration leaks.
Part No. 80-1206-3
3/4” (19mm)
Suction Line
1/4” (7mm)
Liquid Line
Important
To prevent condensation the entire suction line
including the shut off valve must be insulated. All
insulation must be airtight and sealed at both ends.
The minimum requirements are for conditions at or
below 90% humidity and 90°F (32.2°C) ambient.
When higher humidity will be experienced, insulation
wall thickness will need to be increased.
2-19
Installation Instructions
Section 2
Suction Shut Off Valve Insulation
The pre-formed suction shut-off valve insulation is
located in the plastic bag taped to the water curtain.
A. Verify valve and schrader caps are tightened to
specifications (see Step 6).
PRE-FORMED
INSULATION
TIGHTEN VALVE CAPS
TO SPECIFICATIONS
SV3084
3 Phase Scroll Compressor Rotation
CVD2075 Only
A trained and qualified technician must verify
compressor rotation at equipment startup or compressor
warranty will be void. Incorrect rotation of a scroll
compressor can be identified by:
•
Noisy compressor operation
•
Elevated suction pressure
•
Low discharge pressure
•
Compressor trips on overload protector
To change compressor rotation, reverse (exchange
locations) any two incoming power supply leads.
Test run ice machine in the freeze and harvest cycles,
then place toggle switch in OFF position and verify
condensing unit cycles off.
B. Place insulation over schrader valve cap and left
side of valve. Position the tab between the
mounting bracket and rear panel.
PLACE TAB BETWEEN
VALVE BODY AND PANEL
SV3085
C. Fold insulation and hold against right hand side
of valve while securing with electrical tape. Seal
the line set insulation to the shut off valve
insulation with electrical tape.
FOLD INSULATION OVER
RIGHT SIDE OF VALVE AND
SECURE WITH
ELECTRICAL TAPE
SV3086
2-20
Part No. 80-1206-3
Section 2
Installation Instructions
Electronic Bin Thermostat Instructions
POSITIONING
1. Remove screws.
2. Remove backing on 2 sided tape.
3. Rotate and position vertically. Re-install both
screws.
FINAL
POSITION
SHIPS
HORIZONTAL
TO PROTECT
PROBE
Bin Thermostat Location
CONTROL
LOCATION
Control Location
Part No. 80-1206-3
2-21
Installation Instructions
Section 2
THIS PAGE INTENTIONALLY LEFT BLANK
2-22
Part No. 80-1206-3
Section 3
Maintenance
Component Identification
ICE MACHINE HEAD SECTION
Q0600C/Q0800C/Q1000C
COOL
VAPOR
VALVE
DISTRIBUTION
TUBE
LIQUID
LINE SOLENOID
VALVE
WATER
INLET
VALVE
EVAPORATOR
FLOW CLAMP USED
ON REGULAR SIZE
CUBE ONLY
ICE THICKNESS
PROBE
RECEIVER
SERVICE
VALVE
RECEIVER
SUCTION LINE
SHUT-OFF VALVE
WATER DUMP
VALVE
WATER PUMP
DRAIN
HOSE
WATER CURTAIN
LIQUID LINE
SHUT-OFF VALVE
ICE/OFF.CLEAN
SWITCH
WATER TROUGH
SV1754
SV1605
ICE MACHINE HEAD SECTION
IB0600C/IB0800C/IB1000C
ELECTRICAL
COMPARTMENT
ELECTRICAL
COMPARTMENT
OFF/ICE/CLEAN
TOGGLE
SWITCH
WATER
DISTRIBUTION TUBE
SHUT OFF
VALVES
RECEIVER
SERVICE
VALVE
DISCHARGE
LINE
CHECK
VALVE
iCE
THICKNESS
PROBE
WATER
INLET
VALVE
LIQUID
LINE
DRYER
DUMP
VALVE
WATER
CURTAIN
LIQUID LINE
SOLENOID
VALVE
WATER
TROUGH
RECEIVERS
SV3087
Part No. 80-1206-3
COOL
VAPOR
VALVE
SV3051a
3-1
Maintenance
Section 3
ICE MACHINE HEAD SECTION
SU1000C - SERVEND UC-300 DISPENSER
WATER
DISTRIBUTION
TUBE
RECEIVER
SERVICE VALVE
SHUT-OFF VALVES
OFF/ICE/CLEAN
TOGGLE
SWITCH
COOL VAPOR
SOLENOID
VALVE
WATER
PUMP
ELECTRICAL
COMPARTMENT
DUMP
VALVE
WATER
CURTAIN
ICE
THICKNESS
PROBE
WATER FLOAT
VALVE
WATER
TROUGH
WATER PUMP /
FLOAT VALVE
ACCESS PANELS
SV2080
LIQUID LINE
SOLENOID
VALVE
SV2081
ICE MACHINE HEAD SECTION
Q1400C/QDUALC
EVAPORATOR
WATER
PUMP
DISTRIBUTION
TUBE
SUCTION LINE
SHUT-OFF
VALVE
LIQUID LINE
SHUT-OFF
VALVE
COOL
VAPOR
VALVE
WATER
DUMP VALVE
RECEIVER
SERVICE
VALVE
WATER
CURTAIN
WATER
TROUGH
RECEIVER
SV1780
3-2
LIQUID LINE
SOLENOID
VALVE
SV1770RH
Part No. 80-1206-3
Section 3
Maintenance
ICE MACHINE HEAD SECTION
CVD CONDENSING UNIT
Q1400C/QDUALC
CVD0675/CVD0875/CVD1075/CVD1285/CVD1475
ACCESS
VALVES
ICE
THICKNESS
PROBE
CONDENSER
FAN MOTOR
AIR
CONDENSER
ELECTRICAL
COMPARTMENT
ICE/OFF/CLEAN
TOGGLE
WITCH
LIQUID LINE AND
SUCTION LINE
CONNECTION
POINTS
FLOAT VALVE
(WATER INLET)
COOL VAPOR
VALVE
HEAD
PRESSURE
CONTROL
VALVE
SUCTION
ACCUMULATOR
COMPRESSOR
SV2085
SV1770LH
CVD CONDENSING UNIT
CVD CONDENSING UNIT
CVD1476
CVD1875/CVD2075
LIQUID LINE
AND
SUCTION LINE
CONNECTION
POINTS
ACCESS
VALVES
HEAD PRESSURE
CONTROL VALVE
CONDENSER
FAN MOTOR
ELECTRICAL
COMPARTMENT
AIR
CONDENSER
ELECTRICAL
COMPARTMENT
HEAD PRESSURE
CONTROL VALVE
WATER
REGULATING
VALVE
SUCTION
ACCUMULATOR
WATER
COOLED
CONDENSER
COMPRESSOR
SUCTION
ACCUMULATOR
COMPRESSOR
PT1306A
PT1382
Part No. 80-1206-3
LIQUID LINE
AND
SUCTION LINE
CONNECTION
POINTS
CVD1875 Shown - CVD2075 has same layout with
two condenser fan motors
3-3
Maintenance
Section 3
Operational Checks
WATER LEVEL
GENERAL
Q1400C/SU1000C
Manitowoc ice machines are factory-operated and
adjusted before shipment. Normally, a newly installed ice
machine does 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: Routine adjustments and maintenance
procedures outlined in this manual are not covered by
the warranty.
Important
CVD2075 Condensing Units
A scroll compressor must be operated for a
minimum break in period of 72 hours before full ice
production capacity will be reached.
1. Check the water level while the ice machine is in the
freeze mode and the water pump is running. The
correct water level is:
•
Q1400C - 1/8” - 1/2” (3-12.5 mm)
•
SU1000C - 1/8” - 1/4” (3-6.35 mm)
2. The float valve is factory set for the proper water
level. If adjustments are necessary:
A. SU1000C Only-Remove the thumbscrews and
access panels from the float valve/water pump
chimney (located behind the evaporator).
B. Loosen the two screws on the float valve
bracket.
C. Raise or lower the float valve assembly as
necessary then tighten the screws.
D. If further adjustment is required, carefully bend
the float arm to achieve the correct water level.
WATER PUMP
IMPELLER
HOUSING
WATER LEVEL
Q0600C/Q0800C/Q1000C/QDUALC
The water level sensor 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.
SV1616
Q1400C Shown
WATER LEVEL
IB0600C/IB0800C/IB1000C
The water level sensor is set to maintain the proper
water level above the water pump housing. The water
level is not adjustable. Correct water level is
approximately 2.5” (63.5 mm). If the water level is
incorrect, check the water level probe for damage (probe
bent, etc.). Repair or replace the probe as necessary.
WATER
LEVEL
PROBE
SV1616A
Water Level Probe
3-4
WATER
LEVEL
SV3090
Part No. 80-1206-3
Section 3
Maintenance
ICE THICKNESS CHECK
HARVEST SEQUENCE WATER PURGE
After a harvest cycle, inspect the ice cubes in the ice
storage bin. The ice thickness probe is factory-set to
maintain the ice bridge thickness at 1/8" (3.2 mm).
Q0600C/IB0600C/Q0800C/IB0800C/
Q1000C/IB1000C/QDUAL
NOTE: Make sure the water curtain is in place when
performing this check. It prevents water from splashing
out of the water trough.
The harvest sequence water purge adjustment may only
be used when the ice machine is hooked up to special
water systems, such as a de-ionized water treatment
system.
1. Inspect the bridge connecting the cubes. It should
be about 1/8" (3.2 mm) thick.
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.
2. If adjustment is necessary, turn the ice thickness
probe adjustment screw clockwise to increase
bridge thickness, 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).
ADJUSTING SCREW
•
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.
1/8” ICE BRIDGE THICKNESS
CONTROL
BOARD
WATER PURGE
ADJUSTMENT
SV3114
Ice Thickness Check
30
45
3. Make sure the ice thickness probe wire and the
bracket do not restrict movement of the probe.
15
SV1617
Water Purge Adjustment
Part No. 80-1206-3
3-5
Maintenance
Section 3
Interior Cleaning and Sanitizing
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.
NOTE: The SU1024YC is designed for installation
on a SerVend UC-300 dispenser only. Refer to the
SerVend UC-300 Installation, Use and Care Manual
for dispenser cleaning/sanitizing procedures.
3-6
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 biofilm. The active ingredient in AlpahSan
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 releas of silver not only protects
against undesired discoloration of the plastice, but also
will last the life of the plastice part. Although AlphaSan
helps prevent biofilm build up it does not eliminate the
need for periodic cleaning and maintenance. AlphaSan
has no adverse efect on the taste of the ice or beverage.
Part No. 80-1206-3
Section 3
Maintenance
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 “Sanitizing Procedure” for removal of
algae and slime. To initiate a cleaning cycle using
Manitowoc’s Patented Cleaning Technology use the
following procedure.
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.
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.
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, the
CLEAN light will turn off and an ice making
sequence will start automatically.
! Caution
Never use anything to force ice from the evaporator.
Damage may result.
Important
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.
QuietQube® Model
Q0600C IB0600C
Q0800C IB0800C
IB1000C SU1000C
Q1400C
Q1000C QDUALC
Amount of Cleaner
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. This entire cycle lasts approximately 25
minutes.
After the toggle switch is moved to the ICE position,
opening the curtain (bin switch) will interrupt the
cleaning sequence. The sequence will resume from
the point of interruption when the curtain (bin
switch) closes.
*
The Q1400C ice machine control board does not
energize a clean light.
** The Q1400C ice machine control board cannot
perform Step 7 and must remain in the CLEAN
position until the clean cycle is finished. Moving the
toggle switch to the ICE position will initiate a freeze
cycle.
NOTE: The SU1024YC is designed for installation
on a SerVend UC-300 dispenser only. Refer to the
SerVend UC-300 Installation, Use and Care Manual
for dispenser cleaning/sanitizing procedures.
NOTE: Periodic cleaning must be performed on adjacent
surface areas not contacted by the water distribution
system.
Part No. 80-1206-3
3-7
Maintenance
Section 3
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 7 Wait about two minutes or until water starts to
flow over the evaporator.
Step 8 Add the proper amount of Manitowoc Ice
Machine sanitizer to the water trough.
QuietQube® Model
Q600C/Q800C/Q1000C/IB600C
IB800C/IB1000C/Q1400C
QDUALC
! Caution
Never use anything to force ice from the evaporator.
Damage may result.
! Warning
Disconnect electric power to the ice machine (and
dispenser if applicable) at the electric switch box
before proceeding.
Step 2 Remove the water curtain, water distribution
tube, and the components you want to clean or sanitize.
Disassemble the water distribution tube. See the
following pages for removal/disassembly procedures for
these parts.
Step 9 The ice machine will automatically time out a
ten minute sanitizing cycle, followed by six rinse cycles,
and stop. The Clean light* will turn off to indicate the
Cleaning cycle is completed. This entire cycle lasts
approximately 30 minutes.
Step 10 Move toggle switch from CLEAN to OFF, then
back to CLEAN. Repeat steps 7, 8 and 9.
Step 11 When the sanitizing process stops, move the
toggle switch to ICE position.
Important
After the toggle switch is moved to the ICE position,
opening the curtain (bin switch) will interrupt the
sanitizing sequence. The sequence will resume
from the point of interruption when the curtain (bin
switch) closes.
Step 3 Mix a solution of water and sanitizer.
Solution Type
Sanitizer
Water
6 gal. (23 l)
Mixed With
4 oz. (118 ml) sanitizer
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)
Amount of Sanitizer
3 ounces (90 ml)
3.5 ounces (104 ml)
7.5 ounces (222 ml)
*
The Q1400C ice machine control board does not
energize a clean light.
NOTE: The SU1024YC is designed for installation
on a SerVend UC-300 dispenser only. Refer to the
SerVend UC-300 Installation, Use and Care Manual
for dispenser cleaning/sanitizing procedures.
C. Evaporator plastic parts
D. Water Distribution tube exterior and interior
surfaces. Remove water distribution tube Orings then sanitize o-rings and distribution tube
PROCEDURE TO CANCEL A CLEANING OR
SANITIZING CYCLE AFTER IT HAS STARTED
E. Water pump discharge tubing
F. Exterior plastic of water pump
Move the toggle switch to the OFF position. The cycle is
canceled.
G. Ice thickness probe and water level probe
If more than 45 seconds into cycle:
H. Bin or dispenser
Step 1 Move toggle switch to OFF position.
If less than 45 seconds into cycle:
Step 5 Rinse all sanitized areas with clear water.
Step 2 Move toggle switch to ICE position.
Step 6 Install the removed parts, restore power and
place 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 Move toggle switch to OFF position.
The cycle is canceled.
3-8
Part No. 80-1206-3
Section 3
Maintenance
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.
Periodic maintenance must be performed that includes
cleaning of sanitizing the bin (or dispenser) and adjacent
surface areas, which cannot be contacted by the water
distribution system.
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
Never use anything to force ice from the evaporator.
Damage may result.
! 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®.
•
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**
When the automatic cleaning (or sanitizing) cycle is
complete (approximately 25 minutes), ice making
resumes automatically, and the “Harvest Count” is
reset to zero.
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.
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.
C. When the cleaning or sanitizing cycle is
completed, the clean light will turn off and an ice
making sequence will start automatically.
*
The Q1400C ice machine control board does not
energize a clean light.
** The Q1400C ice machine control board cannot
perform Step 7 and must remain in the CLEAN
position until the clean cycle is finished. Moving the
toggle switch to the ICE position will initiate the rinse
cycles. The six rinse cycles must be completed
before a freeze cycle can be initiated.
Part No. 80-1206-3
3-9
Maintenance
Section 3
REMOVAL OF PARTS FOR CLEANING/SANITIZING
4. Use a soft-bristle brush or sponge (NOT a wire
brush) to carefully clean the parts.
! Warning
Disconnect electric power to the ice machine at the
electric switch box before proceeding.
! Warning
Wear rubber gloves and safety goggles (and/or face
shield) when handling Ice Machine Cleaner or
Sanitizer.
! 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.
1. Turn off the water supply to the ice machine at the
water service valve.
2. Remove the water curtain and the components you
want to clean or sanitize. See the following pages for
removal procedures for these parts.
! 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.
9. Verify the ice thickness probe is properly adjusted.
3. Soak the removed part(s) in a properly mixed
solution.
Solution Type
Cleaner
Sanitizer
3-10
Water
1 gal. (4 l)
4 gal. (15 l)
Mixed With
16 oz (500 ml) cleaner
1 oz (30 ml) sanitizer
Part No. 80-1206-3
Section 3
Maintenance
Splash Shield
IB0600C/IB0800C/IB1000C
Splash Shield
Q1400C/QDUAL
1. Pull forward on left and right nylatch connectors
until disengaged from ice machine (connectors
remain attached to splash shield).
2. Remove panel from front of ice machine by lifting
forward and up.
NYLATCH CONNECTORS
PULL FORWARD TO
DISENGAGE
SV1771A
Important
Splash Shield must be reinstalled to prevent water
leakage.
Part No. 80-1206-3
1. Remove quarter turn connector from the right side
of splash shield.
2. Gently bow the center of the splash shield and lift up
and forward to remove.
2. BOW IN CENTER
AND REMOVE
1. REMOVE 1/4 TURN
THUMBSCREW
SV3089
Important
Splash Shield must be reinstalled to prevent water
leakage.
3-11
Maintenance
Section 3
Ice Thickness Probe
Water Curtain
1. Gently flex the curtain in the center and remove it
from the right side.
1. Compress the side of the ice thickness probe near
the top hinge pin and remove it from the bracket.
DISCONNECT
WIRE LEAD
STEP 1
COMPRESS
HINGE PIN TO
REMOVE
STEP 2
SV1213
Water Curtain Removal
ICE
THICKNESS
PROBE
SV1591
2. Slide the left pin out.
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.
! Warning
Disconnect the electric power to the ice machine at
the electric service switch box.
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.
3-12
Part No. 80-1206-3
Section 3
Maintenance
Water Pump
Water Pump
Q0600C/Q0800C/Q1000C/Q1400C/QDUALC
IB0600C/IB0800C/IB1000C
! Warning
! Warning
Disconnect the electric power to the ice machine at
the electric service switch box and turn off the water
supply.
Disconnect the electric power to the ice machine at
the electric service switch box and turn off the water
supply.
1. Remove water level probe; screw and water trough.
1. Disconnect the water pump power cord.
2. Note position of water pump outlet, and then
disconnect vinyl hose from the pump outlet.
POWER
CORD
WATER
PUMP
LOOSEN
SCREWS
3. Rotate the thumbscrew that secures the pump to the
bulkhead 1/4 turn clockwise.
4. Rotate the water pump assembly 1/4 turn
counterclockwise.
5. Lower the pump assembly into the evaporator
compartment.
6. Disconnect the water pump power cord.
7. Remove water pump assembly from ice machine.
1/4 TURN
FASTENER
SV1618
(Q0600C/Q0800C/Q1000C SHOWN)
2. Disconnect the hose from the pump outlet.
3. Loosen the screws securing the pump mounting
bracket to the bulkhead.
PUMP
OUTLET
4. Lift the pump and bracket assembly off the screws.
WATER
PUMP
SV3091
Part No. 80-1206-3
3-13
Maintenance
Section 3
Water Distribution Tube
Water Pump
SU1000C/SerVend UC-300 Dispenser
! Warning
! Warning
Disconnect the electric power to the ice machine at
the electric service switch box and turn off the water
supply.
Disconnect the electrical power to the ice machine
at the electrical disconnect before proceeding.
1. Remove the clamp from the vinyl water hose on the
right side of the distribution tube.
1. Remove top and back access panels from the water
pump chimney.
2. Disconnect the water pump power cord.
3. Disconnect the hose from the pump outlet.
4. Loosen the screws securing the pump-mounting
bracket to the bulkhead.
2
3
1. LIFT UP
2. SLIDE BACK
3. SLIDE TO RIGHT
1
DISTRIBUTION
TUBE
THUMBSCREW
5. Lift the pump and bracket assembly off the screws.
LOCATING
PIN
LOOSEN
SCREWS AND
LIFT PUMP
THUMBSCREW
SV1620
Water Distribution Tube Removal
2. Loosen the two thumbscrews which secure the
distribution tube.
SU1024YC - Loosen the three thumbscrews, which
secure the distribution tube.
3. Lift the right side of the distribution tube up, and then
rotate it backward and to the right until the left side
of the distribution tube disengages the thumbscrew.
REMOVE
PANELS
! Caution
SV2081
Do not force this removal. Be sure the locating tab is
clear before rotating the distribution tube back.
4. Pull the vinyl hose off the distribution tube.
5. 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.
3-14
Part No. 80-1206-3
Section 3
Maintenance
Water Level Probe
Water Level Probe
Q0600C/Q0800C/Q1000C/QDUALC
IB0600C/IB0800C/IB1000C
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.
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
! Warning
Disconnect the electrical power to the ice machine
at the electrical disconnect before proceeding.
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.
2. If complete removal is required, remove the top
cover, left and right side panels and control box
cover. Disconnect the wire lead from the control
board inside the electrical control box.
SCREW
REMOVE
SCREW
WATER
LEVEL
PROBE
WATER
LEVEL
PROBE
WATER
TROUGH
WIRE
LEAD
ICE
MACHINE
SIDE
PANEL
SV3090
SV1621
Ice Beverage Series Water Level Probe
Water Level Probe Removal
Part No. 80-1206-3
3-15
Maintenance
Section 3
Water Trough Removal
IB0600C/IB0800C/IB1000C
Float Valve
Q1400C/SU1000C
! Warning
! Warning
Disconnect the electrical power to the ice machine
at the electrical disconnect before proceeding.
Disconnect the electrical power to the ice machine
at the electrical disconnect before proceeding.
1. Turn off the water supply to the ice machine at the
water service valve.
1. Remove water level probe screw to avoid damaging
the water level probe during water trough removal.
2. Turn the splash shield counterclockwise one or two
turns.
2. Remove the quarter turn fasteners (turn
counterclockwise) securing the trough in place.
COMPRESSION
FITTING
3. Pull forward on the water trough until the rear pins
disengage from the water trough.
WATER INLET
TUBE
4. Lift up and forward on the front of the water trough
while allowing the rear of the water trough to drop.
ON/OFF SLIDE
SWITCH
5. Remove the water trough from the ice machine.
FILTER
SCREEN
AND CAP
SPLASH
SHIELD
SV1217
Float Valve Removal
3. Pull the float valve forward and off the mounting
bracket.
4. Disconnect the water inlet tube from the float valve
at the compression fitting.
1
2
5. Remove the filter screen and cap for cleaning.
3
(PINS LOCATED BEHIND WATER TROUGH)
3-16
SV3089A
Part No. 80-1206-3
Section 3
Maintenance
Water Trough Removal
Q1400C/QDUALC
Water Trough Removal
SU1000C/SerVend UC-300 Dispenser
! Warning
! Warning
Disconnect the electrical power to the ice machine
at the electrical disconnect before proceeding.
Disconnect the electrical power to the ice machine
at the electrical disconnect before proceeding.
1. Remove the quarter turn fasteners (turn
counterclockwise) securing the trough in place.
1. Remove the front splash shield, water pump and
float valve from the ice machine.
2. Pull forward on the water trough until the rear pins
disengage from the water trough.
2. Remove the quarter turn fasteners (turn
counterclockwise) securing the trough in place.
3. Lift up and forward on the front of the water trough
while allowing the rear of the water trough to drop.
3. Lift up and forward on the front of the water trough
while allowing the rear of the water trough to drop.
4. Remove the water trough from the ice machine.
4. Remove the water trough from the ice machine.
1
2
(PINS LOCATED BEHIND WATER TROUGH)
SV3005
REMOVE THE TWO
1/4 TURN FASTENERS
BY TURNING
COUNTERCLOCKWISE
SV1771B
Part No. 80-1206-3
3-17
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.
• If the dump valve is leaking, remove,
disassemble and clean it.
• If the dump valve is not leaking, do not remove
it. Instead, follow the “Cleaning Procedure”.
SV3108
Follow the procedure below to remove the dump valve.
Dump Valve Removal
! 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.
Important
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
SV3109
Dump Valve Disassembly
3-18
Part No. 80-1206-3
Section 3
Maintenance
Water Inlet Valve
Q0600C/IB0600C/Q0800C/IB0800C/
Q1000C/IB1000C/QDUALC
The water inlet valve normally does not require removal
for cleaning. Follow the instructions below to determine if
removal is necessary.
1. Set the ICE/OFF/CLEAN switch to OFF. Locate the
water inlet valve (in the water 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.
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.
Removal
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, when a shut off valve is
installed before the water inlet valve.
3. Remove, clean, and install the filter screen.
Part No. 80-1206-3
3-19
Maintenance
Section 3
Removal from Service/Winterization
GENERAL
Special precautions must be taken if the ice machine
head section is to be removed from service for an
extended period of time or exposed to ambient
temperatures of 32°F (0°C) or below.
CVD 1476 WATER COOLED CONDENSING UNIT
1. Place the ice machine toggle switch into the OFF
position.
2. “Front seat” (shut off) the receiver service valve.
Hang a tag on the switch as a reminder to open the
valve before restarting.
3. Perform steps 1-6 in previous column.
! Caution
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.
4. Disconnect the incoming water and drain lines from
the water-cooled condenser.
5. Insert a large screwdriver between the bottom spring
coils of the water regulating valve. Pry upward to
open the valve.
Follow the applicable procedure below.
1. Place the ice machine toggle switch into the OFF
position.
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. Place the toggle switch in the ICE position, then wait
45 seconds for the water fill solenoid valve to
energize. Blow compressed air through the
incoming water supply in the rear of the ice machine
until no more water comes out of the inlet water line.
7. Make sure water is not trapped in any of the water
lines, drain lines, distribution tubes, etc.
SV1624
Pry Open the Water Regulating Valve
6. Hold the valve open and blow compressed air
through the condenser until no water remains.
AUCS® Accessory
Refer to the AuCS® Accessory manual for winterization
of the AuCS® Accessory.
3-20
Part No. 80-1206-3
Section 4
Ice Machine Sequence of Operation
Q0600C/IB0600C/Q0800C/IB0800C
Q1000C/IB1000C/SU1000C
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 cool vapor solenoid 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
Ice Machine Head Section: The liquid line solenoid
valve starts after the 45 second water purge, and it
remains on throughout the entire Freeze and Harvest
Sequences. The cool vapor solenoid valve remains on
for 5 seconds during initial compressor start-up and then
shuts off.
The water fill valve is energized at the same time as the
liquid line solenoid valve.
FREEZE SEQUENCE
3. Prechill
The compressor is on for 30 seconds prior to water flow,
to prechill the evaporator. The water fill valve remains on
until the water level probe is satisfied.
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.
Continued on next page …
CVD Condensing Unit: When the refrigerant pressure
is high enough to close the low-pressure control, (after
cool vapor valve energizes in step 1) the contactor coil is
energized and the compressor starts. The compressor
and fan cycling control* are supplies with power
throughout the entire Freeze and Harvest Sequences.
When the refrigerant pressure is high enough to close
the fan cycling pressure control the condenser fan motor
starts.
* The Q0600C & IB0600C ice machines do not use a
fan cycling control. 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.
Part No. 80-1206-3
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) for
the last 15 seconds of the 45-second water purge.
Ice Machine Section: 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” for details.)
The cool vapor solenoid valve also opens at the
beginning of the water purge to divert refrigerant gas into
the evaporator.
When the refrigerant pressure is low enough to open the
fan cycling pressure control* the condenser fan motor
stops.
* The Q0600C & IB0600C ice machines do not use a
fan cycle control, therefore the condenser fan motor
will continue to run in the harvest cycle.
6. Harvest
The cool vapor solenoid valve 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.
CVD Condensing Unit: The liquid line solenoid valve
closes, allowing the refrigeration system to pump down.
when the refrigerant pressure is low enough to open the
fan cycling pressure control* the condenser fan motor
stops. When the refrigerant pressure is low enough to
open the low pressure control, the contactor coil is deenergized and the compressor stops.
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.
* The Q0600C & IB0600C ice machines do not use a
fan cycle control, therefore the condenser fan motor
will energize and de-energize with the compressor.
The momentary opening and re-closing of the bin switch
terminates the harvest sequence and returns the ice
machine to the freeze sequence (steps 3-4).
4-2
Part No. 80-1206-3
Section 4
Ice Machine Sequence of Operation
Ice Making Sequence of Operation
Q1400C
INITIAL START-UP OR START-UP AFTER
AUTOMATIC SHUT-OFF
1. Water Purge
Before the refrigeration system 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.
HARVEST SEQUENCE
4. 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. After the 45 second water purge, the water
pump and dump valve de-energizes.
FREEZE SEQUENCE
Both cool vapor solenoid valves also open at the
beginning of the water purge to divert refrigerant gas into
the evaporator.
2. Prechill
5. Harvest
Ice Machine Head Section: The liquid line solenoid
valve energize after the 45 second water purge and
remains on throughout the entire ice making Freeze and
Harvest Sequences. The liquid line solenoid is
energized for 30 seconds prior to water flow. This allows
the refrigeration system to start-up and prechills the
evaporator.
The cool vapor solenoid valves remain open and the
refrigerant gas warms each evaporator causing the
cubes to slide as a sheet, off the evaporator and into the
storage bin. The ice may fall first from either the right or
the left evaporator, or both at the same time. The sliding
sheet of cubes swings the water curtain out, opening the
corresponding bin switch.
CVD Condensing Unit: When the refrigerant pressure
is high enough to close the low pressure switch, the
contactor coil is energized and the compressor and
condenser fan motor (CVD1475 only) start. They are
supplied with power throughout the entire Freeze and
Harvest Sequences. The fan motor (CVD1475 only) is
wired through a fan cycle pressure control, therefore it
may cycle on and off.
The momentary opening and closing of the bin switch
de-energizes relay#2 (right) or #3 (left). Opening relay
#2 or #3 de-energizes the corresponding cool vapor
solenoid valve for the remainder of the Harvest
Sequence. The momentary opening and closing of both
bin switches terminates the Harvest Sequence and
returns the ice machine to the Freeze Sequence (steps
2-3).
3. Freeze
AUTOMATIC SHUT-OFF
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.
6. Automatic Shut-Off
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.
Ice Machine Head Section: When the storage bin is full
at the end of a harvest sequence, the sheet of cubes
fails to clear either one or both water curtains. After one
or both water curtains are held open for 7 seconds, all
five relays are held open the ice machine shuts off.
CVD Condensing Unit: When the refrigerant pressure
is low enough to open the low-pressure switch, the
contactor coil is de-energized and the compressor and
condenser fan motor (CVD1475 Only) stop.
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(s). As the water curtain(s) swing
back to the operating position, the bin switch re-closes
and the ice machine restarts (steps 1 - 2).Both curtains
must be closed to start an ice making sequence.
Part No. 80-1206-3
4-3
Ice Machine Sequence of Operation
Section 4
Ice Making Sequence of Operation
QDUALC
INITIAL START-UP OR START-UP AFTER
AUTOMATIC SHUT-OFF
1. Water Purge
Before the refrigeration system 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 solenoid valves are also
energized during the water purge, although they stay on
for an additional 5 seconds (50 seconds total on time)
then shuts off.
2. Refrigeration System Start-Up
Ice Machine Head Section: The liquid line solenoid
valve energizes after the 45 second water purge and
remains on throughout the entire Freeze and Harvest
Sequences. The harvest solenoid valves remains on for
5 seconds during initial compressor start-up and then
shuts off.
When sufficient ice has formed, the water flow (not the
ice) contacts the ice thickness probe. After
approximately 10 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.
HARVEST SEQUENCE
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 for the last
15 seconds of the 45 second water purge. After the
45 second water purge, the water pump and dump
solenoid valve de-energize. The harvest solenoids open
at the beginning of water purge.
6. Harvest
CVD Condensing Unit: When the refrigerant pressure
is high enough to close the low pressure control, (after
the cool vapor valves energize in step 1) the contactor
coil is energized and the compressor starts. The
compressor and fan cycling control are supplied with
power throughout the entire Freeze and Harvest
Sequences. When the refrigerant pressure is high
enough to close the fan cycling pressure control the
condenser fan motor starts.
The harvest solenoid valves remain open and the
refrigerant warms each evaporator causing the cubes to
slide as a sheet, off the evaporator and into the storage
bin. The ice may fall first from either the right or the left
evaporator, or both at the same time. The sliding sheet
of cubes swings the water curtain out, opening the
corresponding bin switch, which causes relay #5 or #6 to
open. Opening relay #5 or #6 de-energizes the
corresponding harvest solenoid valve for the remainder
of the Harvest Sequence. The momentary opening and
re-closing of both bin switches terminates the Harvest
Sequence and returns the ice machine to the Freeze
Sequence (steps 3-4).
FREEZE SEQUENCE
6a. Water Assist Harvest Feature
3. Prechill
Typical duration of a harvest sequence is less than 2.5
minutes when the harvest sequence time reaches 4
minutes the following occurs:
The water fill valve is energized at the same time as the
liquid line solenoid valve.
The liquid line solenoid is energized for 30 seconds prior
to water flow. This allows the refrigeration system to start
up and prechill the evaporator. The water fill valve
remains energized until the water level sensor is
satisfied.
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 one more time to refill the water trough as
needed.
4-4
4 minutes into a Harvest Sequence. The water fill valve
will energize to fill the trough with water.
5 minutes into a Harvest Sequence. The water pump will
energize and flow water over the evaporators.
The water fill valve and water pump remain on until all
bin switches have been activated, or until the 7 minute
Harvest Sequence time limit is reached.
Part No. 80-1206-3
Section 4
Ice Machine Sequence of Operation
AUTOMATIC SHUT-OFF
7. Automatic Shut-Off
Ice Machine Head Section: When the storage bin is full
at the end of a harvest sequence, the sheet of cubes
fails to clear either one or both water curtains. After one
or both water curtains are held open for 7 seconds the
ice machine shuts off.
CVD Condensing Unit: When the refrigerant pressure
is low enough to open the low-pressure switch, the
contactor coil is de-energized and the compressor and
condenser fan motor stop.
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(s). As the water curtain(s) swing
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. Both curtains must be
closed to start an ice making sequence.
Part No. 80-1206-3
4-5
Ice Machine Sequence of Operation
Section 4
THIS PAGE INTENTIONALLY LEFT BLANK
4-6
Part No. 80-1206-3
Section 5
Water System Ice Making Sequence of Operation
Q0600C/IB0600C/Q0800C/IB0800C/
Q1000C/IB1000C/QDUALC
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.
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
FREEZE CYCLE
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
Water Flow Over the Evaporator
Part No. 80-1206-3
5-1
Water System Ice Making Sequence of Operation
•
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.
5. After the 45-second purge, the water pump and
water dump valve de-energize.
NOTE: The control board has an adjustable water purge
in the harvest cycle. This permits a 15, 30 or 45 second
purge cycle. Adjusting the purge time to less than 45
seconds eliminates the 15 second flush time.
QDUALC Only
Water Assist Harvest Feature
Typical duration of a harvest sequence is less than 2.5
minutes when the harvest sequence time reaches 4
minutes the following occurs:
Section 5
4 Minutes into a Harvest Sequence:
The water fill valve will energize to fill the trough with
water.
•
5 Minutes into a Harvest Sequence:
The water pump will energize and water will flow over
the evaporators. The water fill valve and water pump
remain on until all bin switches have been activated.
•
7 Minutes into a Harvest Sequence:
The maximum harvest time is 7 minutes at which
point the control board check bin switch position.
Both bin switches closed - The ice machine starts a
Prechill cycle.
One or both bin switches open - The ice machine
starts and Automatic Shut-off sequence.
AUTOMATIC SHUT-OFF
There is no water flow during an automatic shut-off.
WATER INLET VALVE
TO DISTRIBUTION TUBE
WATER PUMP
WATER DUMP VALVE
TO DRAIN
SV1677
Water Flow Down the Drain
5-2
Part No. 80-1206-3
Section 5
Water System Ice Making Sequence of Operation
Q1400C/SU1000C
FREEZE CYCLE
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.
2. To pre-chill the evaporator, there is no water flow
over the evaporator for the first 30 seconds of the
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.
TO DISTRIBUTION TUBE
WATER PUMP
WATER DUMP VALVE
TO DRAIN
SV1456
Water Flow Over the Evaporator
Part No. 80-1206-3
5-3
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.
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.
NOTE: The control board for SU1000C has an
adjustable water purge in the harvest cycle. This permits
a 15, 30 or 45 second purge cycle. Adjusting the purge
time to less than 45 seconds eliminates the 15 second
flush time.
TO DISTRIBUTION TUBE
WATER PUMP
WATER DUMP VALVE
TO DRAIN
SV1456
Water Flow Down the Drain
5-4
Part No. 80-1206-3
Section 6
Electrical System
Energized Parts Charts
Q0600C/IB0600C/Q0800C/IB0800C/Q1000C/IB1000C/SU1000C
Ice Making
Sequence Of
Operation
1
Control Board Relays
2
3
4
Water
Pump
Water Fill
Valve
On
Off
On
On
Off
Open/
Closed2
On3
45 Seconds
Off
On
On
Off
On
Closed
On3
5 Seconds
Off
Off
On
Closed
On3
30 Seconds
Off
May cycle On/
Off during first
45 sec.
----------Cycles On,
then Off 1
more time
Contactor
Coil
Compressor/
Condenser
Fan Motor
Length
Of Time
Cool
Vapor
Valve
START-UP 1
1. Water Purge
2. Refrigeration
System
Start-Up
FREEZE
SEQUENCE
3. Pre-Chill
Water
Dump
Valve
5
Liquid
Line
Solenoid
Valve
Condensing Unit
LPC*
Contactor
Off
Off
On
Closed
On3
Until 7 sec.
water contact
with ice
thickness probe
30 sec. Off,
15 sec. On
On
On
On
Closed
On3
Factory-set at
45 Seconds
Off
Off
On
Off
On
Closed
On3
Off
Off
Off
Off
Off
Open
Off
4. Freeze
On
HARVEST
SEQUENCE
5. Water Purge
On
6. Harvest
7. AUTOMATIC
SHUT-OFF
Bin switch
activation
Until bin switch
re-closes
*Low Pressure Control (close on pressure increase).
1. Initial Start-Up or Start-Up After Automatic Shut-Off
2. Contactor Coil energizes in Water Purge when suction pressure exceeds 22 psig.
3. The fan motor is wired through a fan cycle pressure control, therefore, it may cycle on and off. Q0600C & IB0600C ice machines do not use a fan
cycle control, therefore the condenser fan motor will be energized anytime the contactor is closed.
SU1000C - A float valve replaces the water inlet valve. The float adds water anytime the water level drops below the float valve set point.
Safety Timers
The control board has the following non-adjustable safety timers:
Freeze Sequence:
•
The ice machine is locked in the Freeze Sequence 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.
Harvest Sequence:
•
The maximum harvest time is 3.5 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. If the bin switch is closed, the
ice machine will go to the Freeze Sequence.
Part No. 80-1206-3
6-1
Electrical System
Section 6
Energized Parts Charts
Q1400C
Ice Making
Sequence Of
Operation
1
Water
Pump
START-UP 1
1. Water Purge
FREEZE
SEQUENCE
2. Pre-Chill
Control Board Relays
2
3
4
Cool
Cool Vapor
Water
Vapor
Valve
Dump
Valve
Valve
(Right)
(Left)
5
Condensing Unit
LPC*
Contactor
Liquid
Line
Solenoid
Valve
Contactor
Coil
Compressor/
Condenser
Fan Motor
Length
Of Time
On
Off
Off
On
Off
Open
Off
45 Seconds
Off
Off
Off
Off
On
Closed
On2
30 Seconds
3. Freeze
On
Off
Off
Off
On
Closed
On2
Until 7 sec.
water contact
with ice
thickness
probe
HARVEST
SEQUENCE
4. Water Purge
On
On
On
On
On
Closed
On2
Factory-set at
45 Seconds
5. Harvest
Off
On
On
Off
On
Closed
On2
6. AUTOMATIC
SHUT-OFF
Off
Off
Off
Off
Off
Open
Off
Bin switch
activation
Until bin switch
re-closes
*Low Pressure Control (close on pressure increase).
1. Initial Start-Up or Start-Up After Automatic Shut-Off
2. CVD1375/CVD1475 ONLY - The fan motor is wired through a fan cycle pressure control, therefore, it may cycle on and off.
Safety Timers
The control board has the following non-adjustable safety timers:
Freeze Sequence:
•
The ice machine is locked in the Freeze Sequence 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.
Harvest Sequence:
•
The maximum harvest time is 3.5 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. If the bin switch is closed, the
ice machine will go to the Freeze Sequence.
6-2
Part No. 80-1206-3
Section 6
Electrical System
Energized Parts Charts
QDUALC
Ice Making
Sequence Of
Operation
1
2
Control Board Relays
3
4
5
Liquid
Cool
Dump
Line
Vapor
Solenoid Solenoid
Valve 1
Valve
6
Condensing Unit
LPC*
Contactor
Cool
Vapor
Valve 2
Contactor
Coil
Compressor/
Condenser
Fan Motor
Length
Of
Time
Water
Pump
Water Fill
Valve
On
Off
On
Off
On
On
Closed
On
45 Sec.
Off
On
Off
On
On
On
Closed
On2
5 Sec.
Off
On until
Water
Sensed
Off
On
Off
Off
Closed
On2
30 Sec.
START-UP 1
1. Water Purge
2. Refrigeration
System
Start-Up
FREEZE
SEQUENCE
3. Pre-Chill
4. Freeze
On
Cycles Off
then On
1more
time
HARVEST
SEQUENCE
5. Water Purge
On
30 sec.
Off,
15 sec. On
On
On
On
On
Closed
On2
6. Harvest
Off
Off
Off
On
On
On
Closed
On2
7. AUTOMATIC
SHUT-OFF
Off
Off
Off
Off
Off
Off
Open
Off
Off
On
Off
Off
Closed
On2
Until 10
sec.
water
contact
with ice
thickness
probe
Factoryset at 45
Seconds
Bin
switch
activation
Until bin
switch recloses
*Low Pressure Control (close on pressure increase).
1. Initial Start-Up or Start-Up After Automatic Shut-Off
2. Contactor Coil energizes in Water Purge when suction pressure exceeds 22 psig.
3. The fan motor is wired through a fan cycle pressure control, therefore, it may cycle on and off.
Safety Timers
The control board has the following non-adjustable safety timers:
Freeze Sequence:
•
The ice machine is locked in the Freeze Sequence 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.
Harvest Sequence:
•
The maximum harvest time is 7 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. If the bin switch is closed, the ice
machine will go to the Freeze Sequence.
Part No. 80-1206-3
6-3
Electrical System
Section 6
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)
( )
Wire Number Designation
(The number is marked at each end of the wire)
—>>—
Multi-Pin Connection
(Electrical Box Side) —>>— (Compressor Compartment Side)
6-4
Part No. 80-1206-3
Section 6
Electrical System
ICE MACHINE HEAD SECTION
Q0600C/IB0600C/Q0800C/IB0800C/Q1000C/IB1000C
115V/60Hz/1Ph 230V/60Hz/1Ph 230V/50Hz/1Ph
(Diagram Shown During Freeze Cycle)
WATER VALVE
SEE SERIAL PLATE FOR VOLTAGE
(21)
(20)
L2 (N)
(22)
L1
GROUND
(61)
COOL VAPOR
VALVE
(60)
3
(77)
4
(80)
2
1
(76)
DUMP VALVE
5
(81)
WATER PUMP
(57)
(98)
TRANS
(9)
FUSE (7A)
(55)
(58)
(56)
1C
ICE THICKNESS PROBE
(83)
(8)
LIQUID LINE
SOLENOID
(97)
1F
WATER LEVEL PROBE
1G
LOW DC
VOLTAGE
PLUG
WATER LIGHT
BIN SWITCH LIGHT
(62)
BIN SWITCH
(64)
HARVEST LIGHT/
SAFETY LIMIT CODE
(63)
(65)
(68)
(67)
(66)
(75)
CLEAN LIGHT
(69)
TOGGLE SWITCH
ICE
OFF
(62) CLEAN
INTERNAL
WORKING
VIEW
(68)
(66)
(62)
(67)
(69)
SV3094
Part No. 80-1206-3
6-5
Electrical System
Section 6
ICE MACHINE HEAD SECTION
IB0600C/IB0800C/IB1000C with Electronic Bin Thermostat
115V/60Hz/1Ph 230V/60Hz/1Ph 230V/50Hz/1Ph
(Diagram Shown During Freeze Cycle)
WATER VALVE
SEE SERIAL PLATE FOR VOLTAGE
(21)
(20)
L2 (N)
(22)
L1
GROUND
(61)
COOL VAPOR
VALVE
(60)
3
(77)
4
(80)
2
DUMP VALVE
1
(76)
5
WATER PUMP
(57)
(9)
(98)
TRANS
(81)
FUSE (7A)
(55)
(58)
(8)
LIQUID LINE
SOLENOID
(56)
1C
ICE THICKNESS PROBE
(83)
(97)
1F
WATER LEVEL PROBE
1G
LOW DC
VOLTAGE
PLUG
WATER LIGHT
BIN SWITCH LIGHT
(62)
BIN SWITCH
(64)
HARVEST LIGHT/
SAFETY LIMIT CODE
(63)
(65)
(68)
(67)
(69)
(66)
TOGGLE SWITCH
ICE
OFF
(62) CLEAN
(WHITE)
INTERNAL
WORKING
VIEW
(68)
(66)
(62)
(67)
(69)
BIN THERMOSTAT
CONTROL
C
(RED)
(75)
CLEAN LIGHT
NC
240V C
115V
THERMISTOR
(BLUE)
SV3094
(BROWN)
*240V Machines Connect
Brown to 240V and Common (C)
6-6
Part No. 80-1206-3
Section 6
Electrical System
SU1000C
115V/60Hz/1Ph 230V/60Hz/1Ph 230V/50Hz/1Ph
(Diagram Shown During Freeze Cycle)
SEE SERIAL PLATE FOR VOLTAGE
L2 (N)
L1
GROUND
(61)
COOL VAPOR
VALVE
(60)
3
(77)
(80)
4
2
DUMP VALVE
1
5
(76)
(75)
(82)
(81)
WATER PUMP
(57)
(98)
TRANS
(9)
FUSE (7A)
(58)
(55)
(83)
LIQUID LINE
SOLENOID
1C
ICE THICKNESS PROBE
(56)
1F
(75)
NOT USED
LOW DC
VOLTAGE
PLUG
(62)
(63)
(65)
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE
(68)
TOGGLE SWITCH
(67)
(66)
(80)
(97)
CLEAN LIGHT
1G
BIN SWITCH
(81)
(69)
(62)
ICE
OFF
CLEAN
INTERNAL
WORKING
VIEW
(68)
(66)
(62)
(67)
(69)
SV3006
Part No. 80-1206-3
6-7
Electrical System
Section 6
Q1400C
115V/60Hz/1Ph 230V/60Hz/1Ph 230V/50Hz/1Ph
(Diagram Shown During Freeze Cycle)
SEE SERIAL PLATE FOR VOLTAGE
L2 (N)
COOL VAPOR
VALVE
(LEFT)
L1
GROUND
(61)
(91)
(60)
3
(77)
(20)
COOL VAPOR
VALVE
(RIGHT)
(92)
4
2
1
DUMP VALVE
(81)
(76)
5
(57)
TRANS
(82)
WATER PUMP
(98)
(99)
(83)
(80)
FUSE (7A)
(58)
LIQUID LINE
SOLENOID
1C
ICE THICKNESS PROBE
(56)
(97)
1B
RESISTOR
1A
(80)
(75)
LOW DC
VOLTAGE
PLUG
RIGHT CURTAIN
LEFT CURTAIN
(62)
(63)
HARVEST LIGHT/
SAFETY LIMIT CODE
(65)
BIN SWITCH
(LEFT)
(93)
(68)
(67)
BIN SWITCH
(RIGHT)
(66)
TOGGLE SWITCH
INTERNAL
ICE
WORKING
(69) OFF
VIEW
CLEAN
(62)
VIEW
FOR
WIRING
(68)
(66)
(62)
(67)
(69)
SV3095
6-8
Part No. 80-1206-3
Section 6
Electrical System
QDUALC
115V/60Hz/1Ph 230V/60Hz/1Ph 230V/50Hz/1Ph
(Diagram Shown During Freeze Cycle)
L1
L2 (N)
(75)
(82)
(56)
GROUND
(97)
(58)
WATER PUMP
(57)
(99)
(98)
(20)
(60)
WATER FILL
SOLENOID
2
1
(55)
(92)
(22)
3
4
(81)
(76)
DUMP
SOLENOID
5
6
(83)
LIQUID LINE
SOLENOID
(62)
(80)
(77)
COOL VAPOR
VALVE 2
ICE THICKNESS PROBE
(61)
(91)
WATER LEVEL PROBE
COOL VAPOR
VALVE 1
(19)
(1)
(23)
(24)
(22)
(2)
CLEAN
OFF
CURTAIN
SWITCH 1
ICE
(20
CURTAIN
SWITCH 2
SV3075
Part No. 80-1206-3
6-9
Electrical System
Section 6
CONDENSING UNIT
CVD0675/CVD0875/CVD1075/CVD1285/CVD1475/CVD1476/CVD1875/CVD2075
208-230V/60Hz/1Ph or 230V/50Hz/1Ph
(Diagram Shown During Freeze Cycle)
L1
GROUND
L2 (N)
COMPRESSOR
CRANKCASE
HEATER
(94)
(95)
(74)
(96)
HIGH
PRESSURE
CUTOUT
CONTACTOR
COIL
LOW
PRESSURE
SWITCH
FAN MOTOR
(85)
CONTACTOR
CONTACTS
(97)
FAN CYCLE
CONTROL
CONTACTOR
CONTACTS
RUN CAPACITOR
FAN MOTOR
*CVD675.CVD1476 DO
NOT HAVE A FAN
CYCLE CONTROL
*CVD1476 DOES NOT
HAVE A FAN MOTOR
FAN CYCLE
CONTROL
RUN CAPACITOR
(49)
COMPRESSOR
RUN CAPACITOR
S
C
(47)
R
(46)
(45)
R
(44)
(48)
*OVERLOAD
(43)
*CONDENSING UNITS
WITH TWO FANS ONLY
5
2
RELAY
S
1
START
CAPACITOR
SV3096
6-10
Part No. 80-1206-3
Section 6
Electrical System
CVD0675/CVD0875/CVD1075/CVD1285/CVD1475/CVD1476/CVD1875/CVD2075
208-230V/60Hz/3Ph
(Diagram Shown During Freeze Cycle)
L1
L3
L2
COMPRESSOR
CRANKCASE
HEATER
(94)
(95)
*CVD1475 & CVD2075 DO NOT USE A
COMPRESSOR CRANKCASE HEATER
(96)
HIGH PRESSURE
CUTOUT
L1
LOW PRESSURE
SWITCH
CONTACTOR
COIL
(74)
L2 L3
CONTACTOR
T3
COMPRESSOR
FAN MOTOR
T2
T1
FAN CYCLE
CONTROL
(85)
(97)
*CVD675, CVD1476 DO NOT HAVE A FAN CYLE CONTROL
*CVD1476 DOES NOT HAVE A FAN MOTOR
RUN CAPACITOR
FAN MOTOR
FAN CYCLE
CONTROL
RUN CAPACITOR
*CONDENSING
UNIT WITH TWO
FANS ONLY
SV3104
Part No. 80-1206-3
6-11
Electrical System
Section 6
Electronic Control Boards
AC LINE VOLTAGE
ELECTRICAL PLUG
AC LINE VOLTAGE
ELECTRICAL PLUG
7 AMP FUSE
Green
R-BIN SWITCH
LIGHT
Green
L-BIN SWITCH
LIGHT
AuCS PLUG
Red
ICE THICKNESS
PROBE
MAIN FUSE
HARVEST LIGHT/
SAFETY LIMIT
CODE LIGHT
1C
1B
DUAL
1A
WATER LEVEL
PROBE
SINGLE
SINGLE OR DUAL
EVAPORATOR ICE
MACHINE SETTING
AuCS PLUG
CLEAN LIGHT
Green
WATER LEVEL
PROBE LIGHT
Green
BIN SWITCH
LIGHT
HARVEST LIGH
SAFETY LIMIT
CODE LIGHT
Red
ICE THICKNESS PROBE
(3/16” CONNECTION)
1C
1F
1G
WATER LEVEL PROBE
DC LOW VOLTAGE
ELECTRICAL PLUG
SV1587
DC LOW VOLTAGE
ELECTRICAL PLUG
Yellow
SV1588
Q0600C/IB0600C/Q0800C/IB0800C/
Q1000C/IB1000C/SU1000C
Q1400C
AC LINE VOLTAGE
ELECTRICAL PLUG
MAIN FUSE
COOL VAPOR
SOLENOID PLUG
0
WATER PURGE
SETTING
ICE THICKNESS PROBE
CLEAN LIGHT
HARVEST LIGHT
WATER LEVEL LIGHT
WATER FILL LIGHT
LIQUID LINE SOLENOID LIGHT
DUMP VALVE LIGHT
WATER PUMP LIGHT
45
CURTAIN SWITCH 2 LIGHT
COOL VAPOR SOLENOID 2 LIGHT
CURTAIN SWITCH 1 LIGHT
WATER LEVEL PROBE
COOL VAPOR SOLENOID 1 LIGHT
ICE/OFF/CLEAN
SWITCH PLUG
CURTAIN
SWITCH
PLUG
SV1587A
QDUALC
6-12
Part No. 80-1206-3
Section 6
Electrical System
Component Specifications and Diagnostics
Three-Minute Delay
CONTROL BOARD
Q0600C/IB0600C/Q0800C/IB0800C/
Q1000C/IB1000C/SU1000C/QDUALC
All QuietQube® control boards incorporate the following
features. Refer to “Sequence of Operation” for additional
information specific to your model.
Harvest/Safety Limit Light
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. 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.
The three-minute delay is initiated whenever the ice
machine cycles off (automatic shut-off) on a full bin.
The delay period starts when a water curtain is open for
7 continuous seconds in the harvest cycle.
•
If the 3-minute delay period has expired, closure of
the water curtain will initiate an immediate start-up of
a freeze sequence.
•
If the water curtain closes before the 3-minute delay
period has expired, the ice machine will start a freeze
sequence immediately after the 3-minute delay
period expires.
•
The 3-minute delay period is over-ridden when the
toggle switch is moved to the OFF position, then
back to ICE.
Freeze Time Lock-In Feature
The ice machine control system incorporates freeze time
lock-in feature. This prevents the ice machine from short
cycling in and out of harvest. The control board locks the
ice machine in the freeze cycle for six minutes. If the
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.
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.
Maximum Freeze Time
The control system includes a built-in safety that will
automatically cycle the ice machine into harvest after 60
minutes in the freeze cycle.
Safety Limits
There are two safety limits that protect the ice machine if
the freeze or harvest cycles are outside of their
guidelines.
Part No. 80-1206-3
Inputs
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. 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” in the component specification
section of this manual for information relating to how the
probe and control board functions together.
Control Board Relays
The control board relays energize and de-energize
system components.
Relays are not field replaceable.
QDUALC Water Assist Harvest
Typical duration of a harvest sequence is less than 2.5
minutes, when the harvest sequence time reaches 4
minutes the following occurs: 4 minutes into a Harvest
Sequence. The water fill valve will energize to fill the
trough with water. 5 minutes into a Harvest Sequence.
The water pump will energize and water will flow over
the evaporators. The water fill valve and water pump
remain on until all bin switches have been activated, or
until the 7 minute Harvest Sequence time limit is
reached.
6-13
Electrical System
Section 6
ELECTRONIC BIN THERMOSTAT
Function
The temperature control opens the bin switch circuit
when ice contacts the sensor. When ice no longer
contacts the sensor, the circuit closes and the ice
machine starts.
Specifications
Setpoint Range: -30 to 212°F (-34 - 100°C)
CONTROL
LOCATION
KEYPAD
JUMPER
LOCATION
RED LEAD
SENSOR
PROBE
P5
P5
BLACK
LEAD
SENSOR
PROBE
MATCH
WIRING
TO ICE
MACHINE
VOLTAGE
RED LEAD
BIN SWITCH
or TOGGLE
SWITCH
WIRE
240V COM 115V
NC
C
NO
WHITE LEAD
BIN SWITCH
or TOGGLE
SWITCH
WIRE
Inside of Bin Thermostat Control
Setting Control Setpoint Value
To view and adjust setpoint, follow these steps:
Control Location
1. Press MENU until the display flashes SP.
CONTROL SETTINGS
Verify control is set properly before proceeding..
Display
SP
DIF
ASD
OFS
SF
Function
Set Point
Differential
Anti-Short Cycle Delay
Temperature Offset
Sensor Failure Mode
Preset Settings
40
1
1
0
1
Positioning the Touchpad Jumper
The P5 jumper position determines if the touchpad is
locked or unlocked. The control is factory locked; to
unlock move the jumper from one pin to two pins.
6-14
2. Press MENU again to display the existing setpoint
value.
3. Press Up or Down (arrows) to change the setpoint
value.
4. Press MENU again to save the new value. The
display returns to the sensed temperature.
NOTE: If no setup entry is made for 30 seconds, the
control reverts to the normal temperature display.
Important
If MENU is not pressed after changing the setpoint
value, the control reverts to the previously
programmed setpoint value.
Part No. 80-1206-3
Section 6
Electrical System
Differential, Anti-Short Cycle Delay, Temperature
Offset, or Sensor Failure Operation
To set or verify the Differential, Anti-Short Cycle Delay,
Temperature Offset or Sensor Failure Operation use the
following method.
Factory Preset Temperature Control Code Settings as
follows:
1. Press and hold MENU until the display changes to
flashing SP.
2. Press up and down (arrows) repeatedly until the
desired function is displayed.
3. Press MENU to display the function’s current value.
4. Press up and down (arrows) until the desired value
is displayed.
D. If the voltage reading is not within the required
range, check the power source and input power
wires for problems.
2. Fault Codes
If the LCD displays an alarm or fault code (SF or EE):
Fault Code
Definition
SF flashing
Open
alternately with OP temperature
sensor or sensor
wiring
SF flashing
Shorted
alternately with SH temperture
sensor or sensor
wiring
EE
Program failure
5. Press MENU to save the new value. The display
returns to the sensor temperature.
NOTE: If no setup entry is made for 30 seconds, the
control reverts to the temperature display.
NOTE: Any saved control settings are non-volatile and
remain in the control’s memory during power
interruptions.
Check Procedure
! Warning
Line voltage is present inside control. Contact with
line voltage can cause serious injury or death.
Solution
See Step 3. Cycle
power to reset
control.
See Step 3. Cycle
power to reset
control.
Reset the control
by pressing MENU.
If problem persists,
replace the control.
3. Check for proper operation.
NOTE: Perform Steps 1 and 2 before performing this
step.
A. Disconnect the load from the output relay
terminals.
B. Reconnect the sensor leads and supply power
to the control.
C. Replace the cover.
D. Check the control settings for proper values.
If the control system does not function properly, verify
that the control is wired and set up properly. If the
problem persists use the following procedures to
determine the cause of the problem.
Important
Follow these troubleshooting procedures in the
order presented. Do not skip any of the steps in the
procedures.
1. Check the proper voltage to the control.
E. Press and hold MENU until SP appears.
F. Press up and down (arrows) to change the
setpoint temperature above and below the
sensor temperature until the relay energizes and
de-energizes.
G. If the output relay does not perform as indicated
replace the control.
H. If proper operation of the control is verified,
reconnect the load.
A. Remove the cover, loosen the four cover
screws.
B. Use an AC voltmeter to check the voltage
between the common and 120V or 240V
terminals.
C. The voltage must be between102 and 132 volts
for 120V applications, 177 and 264 volts for 208/
230V applications.
Part No. 80-1206-3
6-15
Electrical System
Section 6
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.
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
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
This occurs when the bin switch is opened and
closed again within 7 seconds during the harvest
cycle.
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.
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.
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.
4. 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.
6-16
Part No. 80-1206-3
Section 6
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. 80-1206-3
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.
6-17
Electrical System
Section 6
ICE/OFF/CLEAN TOGGLE SWITCH
ICE/OFF/CLEAN TOGGLE SWITCH
Q0600C/IB0600C/Q0800C/IB0800C/
Q1000C/IB1000C/SU1000C/Q1400C
QDUALC
Function
The switch is used to place the ice machine in ICE, OFF
or CLEAN mode of operation.
Function
The switch is used to place the ice machine in ICE, OFF
or CLEAN mode of operation.
Specifications
Double-pole, double-throw switch. The switch is
connected into a varying low D.C. voltage circuit.
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.
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.
Specifications
Single-pole, single-throw switch. The switch is
connected into a varying low D.C. voltage circuit.
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.
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
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.
6-18
ICE
CLEAN
OFF
Terminals
23-20
23-24
23-19
20-23
20-24
20-19
23-24
23-19
23-20
Ohm Reading
Open
Closed
Closed
Open
Closed
Closed
Open
Open
Open
4. Replace the toggle switch if ohm readings do not
match all three switch settings.
Part No. 80-1206-3
Section 6
Electrical System
Ice Thickness Probe Cleaning
Ice Thickness Probe (Harvest Initiation)
HOW THE PROBE WORKS
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.
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.
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). The starting
point before final adjustment is approximately a 3/16”
gap. Place a 1/4” drill bit across the evaporator, then
adjust the ice thickness probe until the metal T touches
the drill bit. Test run and adjust until a 1/8” connecting
bridge is obtained
ADJUSTING SCREW
1/8” ICE BRIDGE
THICKNESS
SV3114
Ice Thickness Check
Make sure the ice thickness probe wire and the bracket
do not restrict movement of the probe.
Part No. 80-1206-3
6-19
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
1C
GROUND
SV3010
JUMPER WIRE
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
GROUND
CLEAN LIGHT
JUMPER
WIRE
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST/SAFETY LIMIT LIGHT
EVAPORATOR
1C
SV1588G
SV3011
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.
6-20
Part No. 80-1206-3
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
EVAPORATOR
1C
SV3011
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. 80-1206-3
6-21
Electrical System
Section 6
Water Level Control Circuitry
FREEZE CYCLE CIRCUITRY
WATER LEVEL PROBE LIGHT
Q0600C/IB0600C/Q0800C/IB0800C
Q1000C/IB1000C/QDUALC
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.
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.
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.
SV1616A
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.
CONTROL BOARD
HARVEST
WATER PURGE
ADJUSTMENT
30
45
15
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.
6-22
SV1617
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. 80-1206-3
Section 6
Electrical System
DIAGNOSING WATER LEVEL CONTROL
CIRCUITRY
Q0600C/IB0600C/Q0800C/IB0800C/Q1000C/IB1000C/QDUAL
Problem: Water Trough Overfilling During The
Freeze Cycle
Step 1 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) then connect a jumper from
the water level probe to any cabinet ground.
Important
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.
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.
YELLOW
GREEN
GREEN
RED
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST/SAFETY LIMIT LIGHT
1C
1F
GROUND
JUMPER
SV1621A
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. 80-1206-3
6-23
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.
GROUND
Yellow
CLEAN LIGHT
Green
WATER LEVEL LIGHT
Green
BIN SWITCH LIGHT
JUMPER WIRE
Red
SV1588G
HARVEST/SAFETY LIMIT LIGHT
1C
1F
1G
SV1588
Step 3
Is water flowing into
the water trough?
NO
YES
YES
6-24
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. 80-1206-3
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.
CLEAN LIGHT
DISCONNECT
WATER LEVEL
PROBE FROM
TERMINAL 1F
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST/SAFETY LIMIT LIGHT
SV1621G
SV1588
Step 3
Is water flowing into
the water trough?
Yes
No
No
Part No. 80-1206-3
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.
6-25
Electrical System
Section 6
Diagnosing An Ice Machine That Will Not
Run
Diagnosing A Condensing Unit That Will
Not Run
ICE MACHINE HEAD SECTION
CONDENSING UNIT
Q0600C/IB0600C/Q0800C/IB800C/
Q1000C/IB1000C/SU1000C/Q1400C/QDUALC
CVD0675/CVD0875/CVD1075/CVD1285/
CVD1475/CVD1875/CVD2075
! 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.
If the water pump is energized but no ice is produced
refer to condensing unit will not run.
1. Verify primary voltage is supplied to ice machine
head section and the fuse/circuit breaker is closed.
2. Verify control board fuse is okay. If the bin switch or
water level probe light functions, the fuse is okay.
If the ice machine water pump is not energized refer to
“Ice Machine Head Section Will Not Run”.
1. Verify primary voltage is supplied to ice machine
condensing unit and the fuse/circuit breaker is
closed.
2. Verify the high-pressure cutout and low-pressure
cutouts are closed. The HPCO and LPCO are
closed if primary line voltage is present at the
contactor coil terminals.
3. Verify line voltage is present at the contactor coil.
4. Verify the contactor contacts are closed and line
voltage is present across all lines.
5. Refer to compressor diagnostics.
3. Verify all bin switches function properly. A defective
bin switch can falsely indicate a full bin of ice.
4. Verify ICE/OFF/CLEAN toggle switch functions
properly. A defective toggle switch may keep the ice
machine in the OFF mode.
5. Verify low DC voltage is properly grounded. Loose
DC wire connections may intermittently stop the ice
machine.
6. Replace the control board.
Be sure Steps 1-5 were followed thoroughly. Intermittent
problems are not usually related to the control board.
6-26
Part No. 80-1206-3
Section 6
Electrical System
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.
SINGLE PHASE COMPRESSORS
1. Disconnect power from the condensing unit and
remove the wires from the compressor terminals.
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 condensing unit and
remove the wires from the compressor terminals.
•
Defective starting component
•
Mechanically seized compressor
To determine which you have:
1. Install high and low side gauges.
2. Try to start the compressor.
3. Watch the pressures closely.
A. If the pressures do not move, the compressor is
seized. Replace the compressor.
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.
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.
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.
Part No. 80-1206-3
6-27
Electrical System
Section 6
Diagnosing Start Components
If the compressor attempts to start, or hums and trips the
overload protector, check the start components before
replacing the compressor.
CAPACITOR
•
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.
RELAY
The relay has a set of contacts that connect and
disconnect the start capacitor from the compressor start
winding. The contacts on the relay are normally closed
(start capacitor in series with the start winding). The
relay senses the voltage generated by the start winding
and opens the contacts as the compressor motor starts.
The contacts remain open until the compressor is deenergized.
! Warning
Disconnect electrical power to the condensing unit
before proceeding.
Relay Operation Check
1. Disconnect wires from relay terminals.
2. Verify the contacts are closed. Measure the
resistance between terminals 1 and 2. No continuity
indicates open contacts. Replace the relay.
3. Check the relay coil. Measure the resistance
between terminals 2 and 5. Not resistance indicates
an open coil. Replace the relay.
6-28
Part No. 80-1206-3
Section 7
Refrigeration System
QuietQube® Tubing Schematic
Q0600C/Q0800C/Q1000C
Condensing Unit
SUCTION LINE
FILTER
COMPRESSOR
CONDENSER
ACCUMULATOR
HEAD
PRESSURE
CONTROL
VALVE
S TRAP
REQUIRED
21’ OR
GREATER
RISE
Ice Machine Head Section
SUCTION
SHUT-OFF
VALVE
LIQUID LINE
SHUT-OFF
VALVE
EVAPORATOR
HEAT EXCHANGER
TXV
COOL VAPOR VALVE
LLSV
DRIER
CHECK VALVE
RECEIVER
SERVICE
VALVE
Part No. 80-1206-3
RECEIVER
SV3099
7-1
Refrigeration System
Section 7
IB0600C/IB0800C/IB1000C/SU1000C
Condensing Unit
SUCTION LINE
FILTER
COMPRESSOR
CONDENSER
HEAD
PRESSURE
CONTROL
VALVE
ACCUMULATOR
S TRAP
REQUIRED
21’ OR
GREATER
RISE
Ice Machine Head Section
SUCTION
SHUT-OFF
VALVE
LIQUID LINE
SHUT-OFF
VALVE
EVAPORATOR
HEAT EXCHANGER
TXV
COOL VAPOR VALVE
LLSV
DRIER
CHECK VALVE
RECEIVER
SERVICE
VALVE
RECEIVERS
7-2
SV3098
Part No. 80-1206-3
Section 7
Refrigeration System
Q1400C/QDUALC
Condensing Unit
SUCTION FILTER
COMPRESSOR
CONDENSER
ACCUMULATOR
CVD1476 ONLY
WATER REGULATING
VALVE
HEAD
PRESSURE
CONTROL
VALVE
CVD1476 ONLY
CONDENSER WATER
OUTLET
S TRAP
REQUIRED
21’ OR
GREATER
RISE
Ice Machine Head Section
SUCTION
SHUT-OFF
VALVE
LIQUID LINE
SHUT-OFF
VALVE
HEAT EXCHANGER
EVAPORATOR
EVAPORATOR
TXV
LLSV
COOL
VAPOR
VALVE
COOL
VAPOR
VALVE
DRIER
RECEIVER
SERVICE
VALVE
CHECK VALVE
RECEIVER
Part No. 80-1206-3
SV3097
7-3
Refrigeration System
Refrigeration System Diagnostics
Section 7
REFRIGERATION SYSTEM OPERATION
The refrigerant enter the ice machine head section and
is store in the receiver. Liquid refrigerant leaves the
receiver through a dip tube and passes through the line
drier and liquid line solenoid valve. The refrigerant then
passes through the heat exchanger where the liquid is
sub-cooled before delivery to the TXV. The liquid
refrigerant passes through the expansion valve orifice
and enters the evaporator as a low pressure saturated
vapor. As the refrigerant leaves the evaporator and
passes through the heat exchanger absorbing additional
heat from the liquid line. The suction vapor returns to the
condensing unit, passes through the suction
accumulator and enters the compressor.
Freeze Cycle
Harvest Cycle
The compressor sends high pressure, high temperature
gas to the condenser.
The head pressure control valve bypasses the
condenser and sends compressor discharge gas directly
to the receiver. The discharge gas keeps the receiver
warm and the refrigerant pressure up as liquid
refrigerant is boiled off the receiver. Vapor from the top
of the receiver flows through the cool vapor valve and
condenses in the evaporator. The change of state of the
refrigerant from vapor to liquid releases the heat
necessary for the harvest cycle. The refrigerant returns
to the condensing unit and enters the suction
accumulator. Vapor refrigerant is returned to the
compressor.
GENERAL
Verify the water and electrical systems are functioning
properly before diagnosing the refrigeration system or
it’s components.
A dirty evaporator increases the length of the harvest
cycle and will cause the ice machine to shut off on safety
limit #2. All Manitowoc ice machines must have their
evaporator(s) cleaned first, if safety limit #2 is in
memory.
Air-Cooled Models - Discharge pressure will exceed the
fan cycle control cut in set point and the condenser fan
motor(s) energizes. The condenser removes heat and
the refrigerant condenser to a high pressure liquid. The
head pressure control valve will modulate to maintain
the correct head pressure and refrigerant temperature.
Water-Cooled Models - The head pressure control valve
modulates from the bypass position to the non-bypass
position as the head pressure exceeds its set point. The
condenser removes heat and the refrigerant condenses
to a high pressure liquid. The water regulating valve will
modulate to maintain the correct head pressure and
refrigerant temperature.
7-4
Part No. 80-1206-3
Section 7
Refrigeration System
Suction Accumulator Operation
Refrigerant Charge
Liquid refrigerant collects in the suction accumulator
during the harvest cycle and is removed during the
freeze cycle. The liquid refrigerant is returned to the
compressor through a screen and orifice in the suction
accumulator J tube. Passing the liquid through the orifice
causes a pressure drop; the liquid flashes to a vapor and
creates a refrigeration affect. It is normal to see frost on
the accumulator, suction line and compressor suction
port in the freeze cycle. The suction accumulator
empties within the first 6 minutes of the freeze cycle.
When the refrigeration affect ends (liquid refrigerant has
been removed), the suction line between the
accumulator and compressor will increase in
temperature. The suction line temperature increases 20
plus degrees 2 minutes after the liquid has been
removed. The time needed to remove the liquid
refrigerant will vary with the ambient temperature and
the length of the harvest cycle. Higher ambient
temperatures = shorter harvest cycles, faster removal of
liquid refrigerant from the accumulator and greater
suction line temperature increases.
Refrigerant charge on QuietQube® ice machines is very
important. Overcharged or undercharged machines will
normally fail in the harvest cycle (produces even sheets
of ice, but will not harvest).
Part No. 80-1206-3
•
Undercharged ice machines run out of liquid
refrigerant in the receiver during harvest. This
increases the harvest cycle time and results in a
safety limit #2 failure.
•
Overcharged ice machines sub cool the liquid
refrigerant in the receiver during the freeze cycle.
resulting in a refrigerant boil off rate in the harvest
cycle that is too low. This increases the harvest cycle
time and results in a safety limit #2 failure.
•
When you are replacing refrigeration system
components, verify refrigerant charge is correct by
weighing amount recovered. Incorrect refrigerant
charge will result in component misdiagnosis.
7-5
Refrigeration System
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:
•
•
Section 7
2. Refer to the appropriate 24 Hour Ice Production
Chart. 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 (21.2°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 (21.2°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.
7-6
Part No. 80-1206-3
Section 7
Refrigeration System
INSTALLATION/VISUAL INSPECTION CHECKLIST
Possible Problem
Ice machine is not level
Condenser is dirty
Water filtration is plugged (if
used)
Water drains are not run
separately and/or are not
vented
Line set is improperly
installed
Corrective Action
Level the ice machine
Clean the condenser
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
Part No. 80-1206-3
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
7-7
Refrigeration System
Section 7
ICE FORMATION PATTERN
IB1000C ONLY
Evaporator ice formation pattern analysis is helpful in ice
machine diagnostics.
Tubing routing for the IB1000C evaporator is different.
The evaporator outlet is at the bottom of the evaporator.
Extremely Thin at the Evaporator Outlet will first be
visible at the bottom and then the right side of the
evaporator. Extremely Thin at the Evaporator Inlet will
first be visible several inches above the bottom of the
evaporator.
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.
Improper ice formation can be caused by any number of
problems.
v
Example: An ice formation that is “extremely thin at the
evaporator 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
Keep the water curtain in place while checking the
ice formation pattern to ensure no water is lost.
OUTLET
Evaporator Tubing Routing
Q0600C/IB0600C/Q0800C/IB0800C/Q1400C/QDUALC
Routing of the tubing on the back of the evaporator
determines the ice fill pattern failure mode. The
evaporator outlet tubing does not exit directly at the top
of the evaporator, but exits several inches below the top
of the evaporator. Extremely Thin at the Evaporator
Outlet will first be visible several inches below the top of
the evaporator. Extremely Thin at the Evaporator Inlet
will first be visible at the bottom of the evaporator.
OUTLET
OUTLET
INLET
SV3102
SV3103
Thin at Outlet
Thin at Inlet
SV3101
1. Normal Ice Formation
Ice forms across the entire evaporator surface.
At the beginning of the freeze cycle, it may appear that
more ice is forming at the evaporator inlet, than at the
evaporator outlet. At the end of the freeze cycle, ice
formation at the outlet will be close to, or just a bit thinner
than, ice formation at the inlet. The dimples in the cubes
at the outlet of the evaporator may be more pronounced
than those at the inlet. 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.
Refer to Ice Thickness Probe Adjustment.
INLET
INLET
SV1576
Thin at Outlet
7-8
SV1575
Thin at Inlet
Part No. 80-1206-3
Section 7
Refrigeration System
Important
The Q1400C & QDUALC 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.
2. Extremely Thin at Evaporator Outlet
There is no ice, or a considerable lack of ice formation at
the evaporator outlet.
Examples: No ice at all at the evaporator outlet, but ice
forms on the rest of the evaporator. Or, the ice at the
evaporator outlet reaches 1/8" to initiate a harvest, but
the rest of the evaporator already has
1/2" to 1" of ice formation.
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. Refer to
Evaporator Tubing Routing on the previous page to
determine your specific model’s tubing configuration.
This is generally caused by loss of heat transfer from the
tubing on the back side of the evaporator or insufficient
water flow.
5. No Ice Formation
The ice machine operates for an extended period, but
there is no ice formation at all on the evaporator.
Possible Causes: Water fill/float valve, water pump,
starving expansion valve, low refrigerant charge,
compressor, etc.
Possible Causes: Water loss, low on refrigerant, starving
TXV, hot water supply, faulty water fill valve, float valve,
etc.
3. Extremely Thin at Evaporator Inlet
There is no ice, or a considerable lack of ice formation at
the evaporator inlet. Examples: The ice at the
evaporator outlet reaches 1/8" to initiate a harvest, but
there is no ice formation at all on the evaporator inlet.
Possible Causes: Insufficient water flow, flooding TXV,
leaking cool vapor valve, etc.
Part No. 80-1206-3
7-9
Refrigeration System
Section 7
SAFETY LIMITS
Safety Limit Stand-By Mode:
General
(QDUALC ONLY)
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. The microprocessor
chip can identify the control boards. Current production
control boards have an orange label on the control board
microprocessor. The earlier version does not have the
orange label.
The first time a safety limit shut down occurs, (three
consecutive long freeze or harvest cycles) the ice
machine will turn off for 60 minutes (Stand-by Mode).
During the Stand-by Mode the harvest light will be
flashing continuously and a safety limit indication can be
viewed. After 60 minutes the ice machine will
automatically restart to see if the problem re-occurs. If
the same safety limit is reached a second time (three
more consecutive long freeze or harvest cycles) the ice
machine will initiate a safety limit shut down and remain
off until it is manually restarted. During a safety limit shut
down the harvest light will be flashing continuously.
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
If 6 consecutive 60-minute freeze cycles occur, the ice
machine stops.
Safety Limit #2: If the harvest time reaches 3.5
minutes, the control board automatically returns the ice
machine to the freeze cycle.
Control Board With Black Microprocessor
If 3 consecutive 3.5 minute harvest cycles occur, the ice
machine stops.
Control Board With Orange Label On Microprocessor
If 500 consecutive 3.5 minute harvest cycles occur, the
ice machine stops.
7-10
Part No. 80-1206-3
Section 7
Refrigeration System
Safety Limit Indication
Control Board with Black Microprocessor
Control Board with Orange Label on 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.
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.
1. Move the toggle switch to OFF.
1. Move the toggle switch to OFF.
2. Move the toggle switch back to ICE.
2. Move the toggle switch back to ICE.
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.
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.
After safety limit indication, the ice machine will restart
and run until a safety limit is exceeded again.
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.
1. Move the toggle switch to OFF.
2. Move the toggle switch back to ICE.
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.
Orange Label
After safety limit indication, the ice machine will restart
and run until a safety limit is exceeded again.
Part No. 80-1206-3
SV1588G
7-11
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.
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 Component Diagnostic Chart, 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.
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.
7-12
Part No. 80-1206-3
Section 7
Refrigeration System
Safety Limit #1
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
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. 80-1206-3
Check/Correct
See “Installation/Visual Inspection Checklist”
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 float valve (SU1000C/Q1400C only)
Dirty/defective water dump valve
Defective water pump
Loss of water from sump area
Ice thickness probe out of adjustment
Harvest cycle not initiated electrically
Contactor not energizing
Compressor electrically non-operational
Restricted condenser air flow
High inlet air temperature (130°F/54.4°C max.)
Condenser discharge air re-circulation
Dirty condenser fins
Defective fan motor
Low water pressure (20 psig min.)
High water temperature (90°F/32.2°C max)
Dirty condenser
High pressure control defective
Non-Manitowoc components
Low refrigerant charge
Defective head pressure control
Defective cool vapor valve
Defective compressor
TXV flooding (check bulb mounting)
TXV starving
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.
7-13
Refrigeration System
Section 7
Safety Limit #2
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.
QDUALC ONLY - Harvest cycle time exceeds 7 minutes for 3 consecutive harvest cycles.
Possible Cause
Improper installation
Water system
Electrical system
Refrigeration system
Check/Correct
See “Installation/Visual Inspection Checklist”
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
Dirty/defective float valve (Q1400C Only)
Ice thickness probe out of adjustment (premature harvest)
Ice thickness probe dirty
Bin switch defective
Non-Manitowoc components
Improper (low or overcharge) refrigerant charge
Defective head pressure control valve
Defective cool vapor valve
Defective fan cycling control (CVD0675/CVD1476 do not have
a fan cycle control)
CVD1476 Only - Water inlet valve is incorrectly adjusted or will
not close during harvest cycle.
SAFETY LIMIT NOTES
SAFETY LIMIT STAND-BY MODE
•
(QDUAL ONLY)
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.
•
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.
7-14
The first time a safety limit shut down occurs, the ice
machine turns off for 60 minutes (Stand By Mode). The
ice machine will then automatically restart to see if the
problem re-occurs. During the Stand By Mode the
harvest light will be flashing continuously and a safety
limit indication can be viewed. If the same safety limit is
reached a second time (the problem has re-occurred 3
more consecutive time) the ice machine will initiate a
safety limit shut down and remain off until it is manually
restarted. During a safety limit shut down the harvest
light will be flashing continuously.
Part No. 80-1206-3
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 Cycle Times/24 Hour Ice Production/
Refrigeration Pressure Chart for ice machine being
checked.
Use the operating conditions determined in step 1 to
find the published normal discharge pressures.
Freeze Cycle _______
Harvest Cycle_______
1 Minute into 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. It is normal for the
discharge pressure to be higher at the beginning of the
freeze cycle (when load is greatest), then drop through
out the freeze cycle.
Freeze Cycle Discharge Pressure High Checklist
Possible Cause
Improper installation
Restricted condenser air flow (air-cooled models)
Improper refrigerant charge
Other
Check/Correct
See “Installation/Visual Inspection Checklist”
High inlet air temperature
Condenser discharge air recirculation
Dirty condenser fins
Defective fan cycling control (CVD675/CVD1476 do not have a fan
cycle control)
Defective fan motor
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
Water inlet valve is incorrectly adjusted (CVD1476 only)
Freeze Cycle Discharge Pressure Low Checklist
Possible Cause
Improper installation
Improper refrigerant charge
Other
Check/Correct
See “Installation/Visual Inspection Checklist”
Undercharged
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)
Defective fan cycle control (CVD675/CVD1476 do not have a fan cycle
control)
Water inlet valve is incorrectly adjusted (CVD1476 only)
NOTE: Do not limit your diagnosis to only the items listed in the checklists.
Part No. 80-1206-3
7-15
Refrigeration System
Section 7
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.
NOTE: Analyze discharge pressure before analyzing
suction pressure. High or low discharge pressure may
be causing high or low suction pressure.
To analyze and identify the proper suction pressure drop
throughout the freeze cycle, compare the published
suction pressure to the published freeze cycle time.
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.
2B. Compare the published freeze cycle time
and published freeze cycle suction pressure.
Develop a chart.
(in the example, the proper suction pressure
should be approximately 38 psig at 6 minutes;
34 psig at 8 minutes; etc.
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.
7-16
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
2 ssss4 ss ss6 ss s8s s10 sss12
sssssssssssssssss52 sss47sss43sss38sss 34sss 29sss25
Published Freeze Cycle Suction Pressure (psig)
Beginning of freeze cycle:
Middle of freeze cycle:
End of freeze cycle:
Time Into
Freeze Cycle
1 minutes
7 minutes
14 minutes
Published
Pressure
52 PSIG
38 PSIG
25 PSIG
59 PSIG at 1 minute
48 PSIG at 6 minutes
40 PSIG at 12 minutes
Actual
Pressure
59 PSIG
48 PSIG
40 PSIG
Result
High
High
High
Part No. 80-1206-3
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”
Discharge pressure is too high, and is affecting suction pressure
(See “Freeze Cycle Discharge Pressure High Checklist”
Overcharged
Wrong type of refrigerant
Non condensables in system
Non-Manitowoc components in system
Cool vapor valve leaking
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”
Discharge pressure is too low, and is affecting suction pressure (See “Freeze Cycle
Discharge Pressure Low Checklist”)
Undercharged
Wrong type of refrigerant
Non-Manitowoc components in system
Improper water supply over evaporator (See “Water System Checklist” )
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. 80-1206-3
7-17
Refrigeration System
ANALYZING FREEZE CYCLE SUCTION LINE
TEMPERATURE
Suction line temperature cannot diagnose an ice
machine. However, comparing this temperature during
the freeze cycle, along with using Manitowoc’s
Refrigeration System Operational Analysis Table, can
help diagnose an ice machine malfunction.
The actual temperature of the suction line varies by
model, and will change throughout the freeze cycle. This
makes documenting the “normal” suction line
temperature difficult. The key to the diagnosis is
observing the compressor suction line temperature
during the last three minutes of the freeze cycle.
Section 7
Use this procedure to document freeze cycle suction line
temperatures.
1. Use a quality temperature meter, capable of taking
temperature readings on curved copper lines.
2. Attach the temperature meter thermocouple to the
copper suction line within 6” of the shut-off valves.
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. Monitor the suction line temperature during the last
three minutes of the freeze cycle and record the low
event.
4. Use this with other information gathered on the
Refrigeration Component Analysis Chart to
determine the ice machine malfunction.
5. Verify refrigerant amount is correct by weight when
recovering refrigerant and replacing a TXV. Grossly
overcharged QuietQube® ice machine in ambient
temperatures below 70°F will have a suction line
temperature below 10°F.
______________
______________
Inlet Temperature
Outlet Temperature
_______________
Difference
Must be within 7°F at 5
minutes into freeze cycle
7-18
Part No. 80-1206-3
Section 7
Refrigeration System
COOL VAPOR VALVE
Analysis
General
The valve can fail in two positions:
The cool vapor valve is an electrically operated valve
that opens when energized, and closes when deenergized.
•
Valve will not open in the harvest cycle.
•
Valve remains open during the freeze cycle.
Normal Operation
The valve is de-energized (closed) during the freeze
cycle and energized (open) during the harvest cycle.
The valve is positioned between the receiver and the
evaporator and performs two functions:
1. Prevents refrigerant from entering the evaporator
during the freeze cycle.
The cool vapor valve is de-energized (closed)
preventing refrigerant flow from the receiver into the
evaporator.
2. Allows refrigerant vapor to enter the evaporator in
the harvest cycle.
During the harvest cycle, the cool vapor valve is
energized (open) allowing refrigerant gas from the
top of the receiver to flow into the evaporator. The
refrigerant changes state (from a vapor to a liquid)
and gives up latent heat. This heat is absorbed by
the evaporator and allows release of the ice slab. In
general, harvest cycle suction pressure rises, then
stabilizes in the range of 65-125 psig (448-861 kPA).
Exact pressures vary according to ambient temperature
and ice machine model. Harvest pressures can be found
in the “Cycle Time/24 Hour Ice Production/Refrigerant
Pressure Charts”.
Part No. 80-1206-3
VALVE WILL NOT OPEN IN THE HARVEST CYCLE
Although the circuit board has initiated a harvest cycle,
suction and discharge pressures remain unchanged
from the freeze cycle. The ice machine will remain in the
harvest cycle for 3.5 minutes, (7 minutes QDUALC) then
initiate a new freeze cycle. After three consecutive
harvest cycles of 3.5 minutes. (7 minutes QDUALC) the
ice machine will stop on a safety limit #2.
VALVE REMAINS OPEN IN THE FREEZE CYCLE:
Symptoms of a cool vapor valve remaining partially open
during the freeze cycle can be similar to symptoms of an
expansion valve or compressor problem. Symptoms are
dependent on the amount of leakage in the freeze cycle.
A small amount of leakage will cause increased freeze
times and an ice fill pattern that is normal.
As the amount of leakage increases the length of the
freeze cycle increases and the amount of ice on the
bottom of the evaporator decreases.
A small amount of leakage will cause an audible
indication as the vapor passes through the valve. As the
size of the leak increases the audible indication
becomes more apparent.
Refer to the Parts Manual for proper valve application.
When replacement is necessary, use only “original”
Manitowoc replacement parts.
7-19
Refrigeration System
REFRIGERATION COMPONENT
DIAGNOSTIC CHART
General
All electrical and water related problems must be
corrected before these chats will work properly. These
tables must be used with charts, checklists and other
references to eliminate refrigeration components not
listed and external items and problems that will cause
good refrigeration components to appear defective.
The tables list four different defects that may affect the
ice machine’s operation.
Procedure
Step 1 Complete each item individually in the
“Operation Analysis” column.
Enter check marks in the 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.
Perform the procedures and check all information listed.
Each item in this column has supporting reference
material.
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 Add the check marks listed under each of the
four columns. Note the column number with the highest
total and proceed to “Final Analysis.”
Section 7
Final Analysis
The column with the highest number of check marks
identifies the refrigeration problem.
COLUMN 1 - COOL VAPOR VALVE LEAKING
A leaking cool vapor valve must be replaced.
COLUMN 2 - LOW CHARGE/TXV STARVING
Normally, a starving expansion valve only affects the
freeze cycle suction, discharge pressure and ice fill
pattern. A low refrigerant will first affect the harvest cycle
pressures. As more refrigerant is lost the freeze cycle
pressures and fill pattern are affected. Verify the ice
machine is not low on charge before replacing an
expansion valve. Weigh the refrigerant when it is
recovered and verify the amount recovered matches the
ice machine model/serial plate amount.
COLUMN 3 - REFRIGERANT OVERCHARGE OR 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.
Verify refrigerant amount is correct by weighing
recovered refrigerant before replacing a TXV. 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
soldered closed to prevent oil leakage in transit. Old
start components must be returned with the faulty
compressor.
NOTE: If two columns have matching high numbers, a
procedure was not performed properly and/or supporting
material was not analyzed correctly.
7-20
Part No. 80-1206-3
Section 7
Refrigeration System
REFRIGERATION COMPONENT DIAGNOSTIC CHART
Single Expansion Valve
Q0600C/IB0600C/Q0800C/IB0800C/Q1000C/IB1000C/SU1000C
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
Cool Vapor Valve
Suction Line Temperature
Attach a temperature probe on
the suction line with-in 6” of the
shut-off valve outlet.
Record the low event at the
end of the freeze cycle.
Final Analysis
Enter total number of boxes
checked in each column.
Part No. 80-1206-3
1
2
3
4
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
or
No ice formation on the top
of the evaporator
Ice formation normal
-orIce formation is extremely
thin at the evaporator outlet
-orNo ice formation on entire
evaporator
Ice formation normal
-orIce formation is extremely
thin at the evaporator inlet
or
No ice formation on entire
evaporator
Ice formation normal
-orNo ice formation on entire
evaporator
Stops on safety limit:
1 or 2
Stops on safety limit:
1 or 2
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
Normal or High
Suction pressure is
High
Audible refrigerant flow
through valve in freeze cycle
No audible refrigerant flow
through valve in freeze cycle
No audible refrigerant flow
through valve in freeze cycle
No audible refrigerant flow
through valve in freeze cycle
Suction line temperature at
the suction shut-off valve is
greater than 10°F(-12.2°C)
at the end of the freeze
cycle.
Suction line temperature at
the suction shut-off valve is
greater than 10°F (-12.2°C)
at the end of the freeze
cycle
Suction line temperature at
the suction shut-off valve is
less than 10°F (-12.2°C)
at the end of the freeze
cycle
Suction line temperature at
the suction shut-off valve is
greater than 10°F (-12.2°C)
at the end of the freeze
cycle
Cool Vapor Valve Leaking
Low On Charge
-OrTXV Starving
Refrigerant Overcharge
-OrTXV Flooding
Compressor
7-21
Refrigeration System
Section 7
Dual Expansion Valve - Q1400C/QDUALC
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 ___________
___________________
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
Cool Vapor Valve
Suction Line Temperature
Attach a temperature probe on
the suction line with-in 6” of the
shut-off valve outlet.
Record the low event at the
end of the freeze cycle.
Final Analysis
Enter total number of boxes
checked in each column.
7-22
1
2
3
4
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 is
Ice formation normal
extremely thin at the
normal on both
normal on both
-oroutlet of one
evaporators
evaporators
No ice formation on
evaporator
-or-orboth evaporators
-orIce formation is
Ice formation is
No ice formation on
extremely thin on
extremely thin on inlet
top of one evaporator outlet of one or both
of one evaporator
evaporators
or
or
No ice formation on
No ice formation on
one evaporator
one or both
evaporators
Stops on safety limit:
Stops on safety limit:
Stops on safety limit:
Stops on safety limit:
1 or 2
1 or 2
1 or 2
1
If discharge pressure is High or Low refer to a 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
Normal or High
Suction pressure is
High
Audible refrigerant flow
through left or right valve in
freeze cycle
No audible refrigerant flow
through left or right valve in
freeze cycle
No audible refrigerant flow
through left or right valve in
freeze cycle
No audible refrigerant flow
through left or right valve in
freeze cycle
Suction line temperature at
the suction shut-off valve is
greater than 10°F(-12.2°C)
at the end of the freeze
cycle.
Suction line temperature at
the suction shut-off valve is
greater than 10°F (-12.2°C)
at the end of the freeze
cycle
Suction line temperature at
the suction shut-off valve is
less than 10°F (-12.2°C)
at the end of the freeze
cycle
Suction line temperature at
the suction shut-off valve is
greater than 10°F (-12.2°C)
at the end of the freeze
cycle
Cool Vapor Valve Leaking
Low On Charge
-OrTXV Starving
Refrigerant Overcharge
-OrTXV Flooding
Compressor
Part No. 80-1206-3
Section 7
Refrigeration System
HEADMASTER CONTROL VALVE
Harvest Cycle Operation
Function
During the harvest cycle the cool vapor valve opens and
allows refrigerant from the top of the receiver tank to
enter the evaporator. The refrigerants change of state
(from vapor to liquid in the evaporator) releases the heat
necessary for the harvest cycle.
The headmaster control valve maintains the correct
discharge pressure and liquid line temperature in the
freeze and harvest cycles.
Manitowoc QuietQube® systems require headmaster
control valves with special settings. Replace defective
headmaster control valves only with “original” Manitowoc
replacement parts.
Freeze Cycle Operation
AIR-COOLED MODELS
During low ambient conditions, it is normal for the head
pressure control valve to hunt (head pressure may
fluctuate up and down) on CVD condensing units.
Hunting varies by model an ambient, but generally
settles out within the first 6 minutes of the freeze cycle.
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 controls nitrogen dome charge starts to
modulate (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 liquid line.
Important
Head pressure settings will vary depending on the
QuietQube® model being worked on.
WATER-COOLED MODELS
The water regulating valve setting is higher than the
head pressure control valve set point. All refrigerant is
directed through the condenser and the water regulating
valve maintains the correct head pressure.
Opening the cool vapor valve causes a drop in
discharge pressure.
AIR-COOLED MODELS
The discharge pressure will drop below the condenser
fan cycling control setpoint and the condenser fan motor
cycles off (at ambient temperatures above 110°F (-43°C)
the condenser fan motor remains energized).
WATER-COOLED MODELS
The discharge pressure will drop below the water
regulating valve setpoint and the water regulating valve
will close.
ALL CVD MODELS
The head pressure control valve cycles into a complete
bypass position (stopping all refrigerant flow through the
condenser).
The warm discharge gas adds heat to the receiver in the
harvest cycle. Without this additional heat the head
pressure would continue to drop as liquid refrigerant
boils off in the receiver.
Example: A service technician removes refrigerant vapor
from a cylinder by boiling off the liquid refrigerant. A
refrigeration effect is created as the refrigerant changes
state from a liquid to a vapor. The cylinder cools and the
refrigerant pressure drops. To maximize flow and
maintain pressure the technician places the cylinder in
warm water.
A head pressure control valve that will not completely
bypass in the harvest cycle will result in longer harvest
cycles with lower than normal suction pressure and
safety limit #2 trips.
Refer to the “Cycle Times/24 Hour Ice Production/
Refrigerant Pressure Charts” for the model being worked
on, to obtain the correct harvest cycle pressure range.
Part No. 80-1206-3
7-23
Refrigeration System
Section 7
Diagnosing Air Cooled Condensing Units
FREEZE CYCLE
1. Determine the air temperature entering the
condenser.
2. Determine if the head pressure is high or low in
relationship to the outside temperature. (Refer to the
proper “Operational Pressure Chart”) If the air
temperature is below 70°F (21.1°C), the head
pressure control will modulate to maintain the
correct liquid line temperature and head pressure.
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.
Rinsing the condenser with cool water during the freeze
cycle will simulate lower ambient conditions.
Freeze Cycle Headmaster Control Valve Failure List
CVD0875/CVD1075/CVD1285/CVD1475/CVD1875/CVD2075
Symptom
Valve not maintaining pressures
Probable Cause
Non-approved valve
Discharge pressure extremely high;
Liquid line entering receiver feels hot
Fan cycling control cycles condenser fan
motor, Liquid line entering receiver
fluctuates between warm and cold.
Discharge pressure low; Liquid line
entering receiver feels warm to hot
Fan cycling control cycles condenser fan
motor, 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
Refer to “Low on Charge Verification”
Ice machine low on charge
Refer to “Low on Charge Verification”
Freeze Cycle Headmaster Control Valve Failure List
CVD0675
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”
7-24
Part No. 80-1206-3
Section 7
Refrigeration System
Procedure
Diagnosing Air Cooled Condensing Units
HARVEST CYCLE
The headmaster control valve diverts the compressor
discharge gas to the ice machine receiver in the harvest
cycle. All refrigerant flow through the condenser in the
harvest cycle stops. Symptoms of a headmaster valve
that will not seat 100% closed (completely bypass the
condenser) in the harvest cycle are:
•
Freeze cycle suction and discharge pressure are
normal.
•
The control board indicates safety limit #2. The
failure seems to be temperature related. Example:
The ice machine may function correctly at
temperatures above 32°F (0°C) but fails at
temperatures below 32°F (0°C).
•
Harvest cycle suction pressure is low.
•
Harvest cycle discharge pressure is normal or
slightly low.
R
! Warning
The compressor discharge line and the liquid line to
the receiver could be hot enough to burn your hand.
Touch them momentarily only.
3. At the start of the harvest cycle feel the compressor
discharge line and the liquid line to the ice machine
receiver at the headmaster valve. The temperature
of both lines will be highest at the beginning of the
harvest cycle and then decrease. Compare the lines
for the first 30 seconds of the harvest cycle and then
refer to the chart below.
CVD0675/CVD0875/CVD1075/CVD1285/CVD1475/
CVD1476/CVD1875/CVD2075
COMPRESSOR
DISCHARGE
LINE
No Flow
LIQUID LINE TO
ICE MACHINE
RECEIVER
2. Allow the ice machine to run a normal freeze cycle
(do not initiate an early harvest cycle).
Harvest Cycle Headmaster Control Valve Failure List
Step 3 Details
Grasp Here with Hands to Compare Temperatures
Flow
t
n
a
ger
e f ri
1. Freeze cycle operation must be normal before
diagnosing the headmaster in the harvest cycle.
(Refer to Cycle Times/24 hr. Ice Production/
Refrigerant Pressure Chart).
Finding
Temperature of the
compressor discharge line
and the liquid line to the ice
machine receiver feel the
same.
The compressor discharge
line is noticeable warmer than
the liquid line to the ice
machine receiver.
Comments
The headmaster is
functioning correctly.
Headmaster valve is not
bypassing 100%. Replace
headmaster valve.
LIQUID LINE
FROM
CONDENSER
SV3100
Part No. 80-1206-3
7-25
Refrigeration System
Section 7
Diagnosing Water Cooled Condensing Unit
REFRIGERANT CHARGE VERIFICATION
FREEZE CYCLE
QuietQube® remote ice machines require the correct
amount of refrigerant (name plate charge) to operate
correctly at all ambient conditions.
The water regulating valve maintains the freeze cycle
discharge pressure. Refer to water regulating valve
diagnostics.
HARVEST CYCLE
The headmaster control valve diverts the compressor
discharge gas to the ice machine receiver in the harvest
cycle. All refrigerant flow through the condenser in the
harvest cycle stops. Symptoms of a headmaster valve
that will not seat 100% closed in the harvest cycle
(completely bypass the condenser) are:
•
Freeze cycle suction and discharge pressure are
normal.
•
The control board indicates safety limit 2.
•
Harvest cycle suction pressure is low.
•
Harvest cycle discharge pressure is normal or high
(water regulating valve attempts to maintain
240 psig)
An ice machine with an over or under charge of
refrigerant may function properly at higher ambient
temperatures and fails at lower ambient temperatures.
Symptoms of incorrect refrigerant charge are:
•
Works during the day and then malfunctions at night.
•
Safety limit #2 in control board memory.
•
Harvest cycle suction pressure is low.
When refrigerant charge is suspected, verify by
recovering the refrigerant, weighing and comparing to
the nameplate amount. Refer to “Refrigerant Recovery/
Evacuation” at the end of this section for recovery
procedures.
Problem
Undercharge
Headmaster Control Valve Failure List
CVD1476
Problem
Cause
Freeze Cycle
Valve not maintaining
The water regulating valve
discharge pressure.
maintains the freeze cycle
discharge pressure.
Discharge pressure
Verify water regulating valve
extremely high; Liquid line
is set and/or operating
entering receiver feels hot.
correctly. Headmaster valve
is stuck in bypass.
Discharge pressure low,
Ice machine low on charge.
Liquid line entering receiver
Refer to “Low on Charge
feels warm to hot.
Verification.”
Harvest Cycle
Discharge pressure normal or Headmaster valve not
high, Liquid line entering
bypassing, Refer to “ Harvest
receiver feels warm, suction Cycle Headmaster Control
pressure is low.
Valve Failure List” for
diagnostic procedure.
7-26
Overcharge
Symptom
Safety limit #2 in control board memory.
Harvest cycle suction pressure is low.
Harvest cycle discharge pressure is
low.
Liquid line entering receiver feels warm
to hot in the freeze cycle.
Depending on the amount of refrigerant
loss, the ice machine may harvest for
one or two cycles when restarted after
an “Automatic Shut-Off” (ice machine
pumped down and shut off on low
pressure control).
Safety limit #2 in control board memory.
Harvest cycle suction pressure is low.
Harvest cycle discharge pressure is
normal.
Freeze cycle time, suction and
discharge pressure are normal and the
ice machine will not harvest. The sheet
of ice cubes show little or no sign of
melting when removed from the
evaporator after the harvest cycle has
been completed. (If the cubes are
melted you have a release problem,
clean the ice machine).
Part No. 80-1206-3
Section 7
Pressure Control Specifications and
Diagnostics
Refrigeration System
FAN CYCLE CONTROL
WATER REGULATING VALVE
CVD0875/CVD1075/CVD1285/CVD1475/
CVD1875/CVD2075
Function
Function
The water regulating valve maintains the freeze cycle
discharge pressure. The valve setting for the CVD1476
condensing unit is 240 psig.
1. Determine if the head pressure is high or low (refer
to Operational Pressure Chart”)
Energizes and de-energizes the condenser fan motor.
The condenser fan motor typically will be on in the
freeze cycle and off in the harvest cycle. Cycling allows
the discharge gas to bypass the condenser (through the
headmaster valve) and enter the receiver. This will
maintain the receiver temperature as the liquid
refrigerant is boiled off in the harvest cycle.
2. Verify the condenser water meets specifications
(refer to section 2 for specifications).
The fan cycle control closes on an increase, and opens
on a decrease in discharge pressure.
3. Adjust valve to increase or decrease discharge
pressure (if discharge pressure remains high refer to
“Headmaster Control Valve Diagnostics” before
replacing valve).
Specifications
Check Procedure
4. Determine the temperature of the liquid line entering
the receiver by feeling it. This line is normally warm;
“body temperature”.
5. Using the information gathered, refer to the chart
below.
Problem
Cause
Freeze Cycle
Valve not maintaining
Valve incorrectly set, dirty or
discharge pressure
defective.
Adjust valve to 240 psig,
clean or replace valve.
Discharge pressure extremely Water regulating valve
high; Liquid line entering
incorrectly set or not opening.
receiver feels hot
Verify Head Pressure Control
Valve operation before
changing water regulating
valve.
Discharge pressure low,
Ice machine low on charge.
Liquid line entering receiver
Refer to “Refrigerant Charge
feels warm to hot
Verification”
Part No. 80-1206-3
Model
CVD0875
CVD1075
CVD1285
CVD1475
CVD1875
CVD2075
Cut-In (Close)
Cut-Out (Open)
250 psig ±5
200 psig ±5
250 psig ±5
200 psig ±5*
275 psig ±5
225 psig ±5*
*The CVD2075 has two fans and two fan cycling controls.
Check Procedure
1. Verify fan motor windings are not open or grounded,
and fan spins freely.
2. Connect manifold gauges to ice machine.
3. Hook voltmeter in parallel across the fan cycle
control, leaving wires attached.
4. Refer to chart below.
FCC SETPOINT: Reading Should Be:
above cut-in
0 volts
below cut-out
line voltage
Fan Should Be:
running
off
7-27
Refrigeration System
Section 7
LOW PRESSURE CUTOUT (LPCO) CONTROL
HIGH PRESSURE CUT-OUT (HPCO) CONTROL
CVD0675/CVD0875/CVD1075/CVD1285/CVD1475/
CVD1476/CVD1875/CVD2075
CVD0675/CVD0875/CVD1075/CVD1285/CVD1475/
CVD1476/CVD1875/CVD2075
Function
Function
Energizes and de-energizes the contactor coil when
suction pressure rises above or falls below setpoint.
Stops the ice machine if subjected to excessive highside pressure.
The LPCO control is closed at pressures above setpoint
and opens at pressures below setpoint.
The HPCO control is normally closed, and opens on a
rise in discharge pressure.
Specifications
Specifications
Cut-out: 7 psig+3
Cut-out:
450 psig ±10
Cut-in: 22 psig+3
Cut-in:
Automatic reset
(must be below 300 psig to reset).
Check Procedure
1. Connect manifold gauges at suction an discharge
access valves at the condensing unit.
Check Procedure
1. Set ICE/OFF/CLEAN switch to OFF.
2. Set ICE/OFF/CLEAN switch to OFF.
2. Disconnect power to condensing unit.
3. The liquid line solenoid valve will de-energize and
the suction pressure will begin to decrease. The lowpressure control will open at the listed specification.
3. Connect manifold gauges on condensing unit
access valves.
4. Use the manifold gauge set to increase suction
pressure. Feed refrigerant from the high side access
valve to the low side access valve. Add refrigerant in
small increments to allow the low side pressure to
be monitored. The low-pressure control will close at
the listed specification.
5. Replace the LPCO control if it:
•
Will not close at the specified set point.
•
Does not open at the specified set point.
4. Hook voltmeter in parallel across the HPCO, leaving
wires attached.
5. Reconnect condensing unit.
6. Set ICE/OFF/CLEAN switch to ICE, block
condensing unit with cardboard (or similar object).
7. No 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.
! 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.
8. Replace the HPCO control if it:
7-28
•
Will not reset (below 300 psig)
•
Does not open at the specified cut-out point
Part No. 80-1206-3
Section 7
Refrigeration System
Cycle Time/24 Hour Ice Production/
Refrigerant Pressure Charts
These charts are used as guidelines to verify correct ice
machine operation. Accurate collection of data is
essential to obtain the correct diagnosis.
•
Refer to “OPERATIONAL ANALYSIS CHART” for the
list of data that must be collected for refrigeration
diagnostics. This list includes: before beginning
service, ice production check, installation/visual
inspection, water system checklist, ice formation
pattern, safety limits, suction line temperature check,
cool vapor valve analysis, discharge and suction
pressure analysis.
•
Ice production checks that are within 10% of the
chart are considered normal. This is due to variances
in water and air temperature. Actual temperatures
will seldom match the chart exactly.
•
Zero out manifold gauge set before obtaining
pressure readings to avoid misdiagnosis.
•
All pressure readings are taken at the ice machine
head section. Pressures taken at the condensing unit
will vary with line set length.
•
Discharge and suction pressure are highest at the
beginning of the cycle. Suction pressure will drop
throughout the cycle. Verify the pressures are within
the range indicated.
•
During low ambient conditions, it is normal for the
head pressure control valve to hunt (fluctuate up and
down) on CVD condensing units. Hunting varies by
model and ambient temperature, but generally
settles out within the first 6 minutes of the freeze
cycle.
Part No. 80-1206-3
7-29
Refrigeration System
Section 7
Q0600C/CVD0675 SERIES REMOTE AIR COOLED
IB0600C/CVD0675 SERIES REMOTE 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
80/26.7
90/32.2
100/37.8
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
7.8-9.3
8.8-10.4
9.5-11.2
8.0-9.4
8.6-10.2
9.7-11.4
8.9-10.5
9.8-11.5
11.0-12.9
9.7-11.2
10.6-12.5
12.0-14.0
Harvest
Time
.75-2.5
Times in minutes
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
7.8-9.3
8.8-10.4
9.5-11.2
8.0-9.4
8.6-10.2
9.7-11.4
8.9-10.5
9.8-11.5
11.0-12.9
9.7-11.2
10.6-12.5
12.0-14.0
Harvest
Time
.75-2.5
Times in minutes
24 Hour Ice Production
24 Hour Ice Production
Air Temp.
Entering
Condenser
°F/°C
-20 to 70/
-29 to 21.1
80/26.7
90/32.2
100/37.8
Air Temp.
Entering
Condenser
°F/°C
-20 to 70/
-29 to 21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
635
575
540
625
585
530
570
525
475
530
490
440
Based on average ice slab weight of 4.12 - 4.75 lb
Regular cube derate is 7%
Operating Pressures
Air Temp.
Entering
Condenser
°F/°C
-20 to 70/
-29 to 21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
635
575
540
625
585
530
570
525
475
530
490
440
Based on average ice slab weight of 4.12 - 4.75 lb
Regular cube derate is 7%
Operating Pressures
Freeze Cycle
Harvest Cycle
Air Temp.
Entering Discharge Suction Discharge Suction
Condenser Pressure Pressure Pressure Pressure
°F/°C
PSIG
PSIG
PSIG
PSIG
260-215
46-26
140-185
75-95
-20 to50/
-29 to10.0
70/21.1
270-220
51-26
150-190
80-100
80/26.7
285-225
56-27
155-195
80-105
90/32.2
295-235
59-28
165-200
85-105
100/37.8
340-260
60-30
180-210
85-112
110/43.3
385-300
65-34
195-230
90-120
Freeze Cycle
Harvest Cycle
Air Temp.
Entering Discharge Suction Discharge Suction
Condenser Pressure Pressure Pressure Pressure
°F/°C
PSIG
PSIG
PSIG
PSIG
260-215
46-26
140-185
75-95
-20 to50/
-29 to10.0
70/21.1
270-220
51-26
150-190
80-100
80/26.7
285-225
56-27
155-195
80-105
90/32.2
295-235
59-28
165-200
85-105
100/37.8
340-260
60-30
180-210
85-112
110/43.3
385-300
65-34
195-230
90-120
Suction pressure drops gradually throughout the freeze cycle
It is normal for the head pressure control valve to fluctuate up and
down (refer to headmaster diagnostics). Depending on ambient
temperature, low event during hunting may be below published
discharge pressures.
Suction pressure drops gradually throughout the freeze cycle
It is normal for the head pressure control valve to fluctuate up and
down (refer to headmaster diagnostics). Depending on ambient
temperature, low event during hunting may be below published
discharge pressures.
7-30
Part No. 80-1206-3
Section 7
Refrigeration System
Q0800C/CVD0875 SERIES REMOTE AIR COOLED
IB0800C/CVD0875 SERIES REMOTE 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
80/26.7
90/32.2
100/37.8
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
9.4-10.8
10.5-12.1
11.4-13.1
9.5-11.0
10.3-11.9
11.2-12.9
10.7-12.3
11.2-12.9
12.3-14.1
11.4-13.1
12.1-13.8
13.3-15.2
Harvest
Time
.75-2.5
Times in minutes
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
9.4-10.8
10.5-12.1
11.4-13.1
9.5-11.0
10.3-11.9
11.2-12.9
10.7-12.3
11.2-12.9
12.3-14.1
11.4-13.1
12.1-13.8
13.3-15.2
Harvest
Time
.75-2.5
Times in minutes
24 Hour Ice Production
24 Hour Ice Production
Air Temp.
Entering
Condenser
°F/°C
-20 to 70/
-29 to 21.1
80/26.7
90/32.2
100/37.8
Air Temp.
Entering
Condenser
°F/°C
-20 to 70/
-29 to 21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
760
690
640
750
700
650
680
650
600
640
610
560
Based on average ice slab weight of 5.75 - 6.50 lb
Regular cube derate is 7%
Operating Pressures
Air Temp.
Entering
Condenser
°F/°C
-20 to 70/
-29 to 21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
760
690
640
750
700
650
680
650
600
640
610
560
Based on average ice slab weight of 5.75 - 6.50 lb
Regular cube derate is 7%
Operating Pressures
Freeze Cycle
Harvest Cycle
Air Temp.
Entering Discharge Suction Discharge Suction
Condenser Pressure Pressure Pressure Pressure
°F/°C
PSIG
PSIG
PSIG
PSIG
260-215
40-22
140-185
75-95
-20 to50/
-29 to10.0
70/21.1
270-220
40-23
150-190
80-95
80/26.7
285-225
47-24
155-195
80-95
90/32.2
295-235
52-25
165-200
85-100
100/37.8
340-260
56-26
180-210
85-112
110/43.3
385-300
60-28
195-230
90-115
Freeze Cycle
Harvest Cycle
Air Temp.
Entering Discharge Suction Discharge Suction
Condenser Pressure Pressure Pressure Pressure
°F/°C
PSIG
PSIG
PSIG
PSIG
260-215
40-22
140-185
75-95
-20 to50/
-29 to10.0
70/21.1
270-220
40-23
150-190
80-95
80/26.7
285-225
47-24
155-195
80-95
90/32.2
295-235
52-25
165-200
85-100
100/37.8
340-260
56-26
180-210
85-112
110/43.3
385-300
60-28
195-230
90-115
Suction pressure drops gradually throughout the freeze cycle
It is normal for the head pressure control valve to fluctuate up and
down (refer to headmaster diagnostics). Depending on ambient
temperature, low event during hunting may be below published
discharge pressures.
Suction pressure drops gradually throughout the freeze cycle
It is normal for the head pressure control valve to fluctuate up and
down (refer to headmaster diagnostics). Depending on ambient
temperature, low event during hunting may be below published
discharge pressures.
Part No. 80-1206-3
7-31
Refrigeration System
Section 7
Q1000C/CVD1075/CVD1285 SERIES
REMOTE AIR COOLED
IB1000C/CVD1075/CVD1285 SERIES
REMOTE 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
80/26.7
90/32.2
100/37.8
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
9.9-10.6
10.8-11.6
11.8-12.6
10.1-10.9
10.6-11.4
11.6-12.5
10.9-11.7
11.5-12.3
12.6-13.5
12.1-13.0
12.8-13.7
14.0-15.0
Harvest
Time
.75-2.5
Times in minutes
Freeze Time
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
9.9-10.6
10.8-11.6
11.8-12.6
10.1-10.9
10.6-11.4
11.6-12.5
10.9-11.7
11.5-12.3
12.6-13.5
12.1-13.0
12.8-13.7
14.0-15.0
Harvest
Time
.75-2.5
Times in minutes
24 Hour Ice Production
24 Hour Ice Production
Air Temp.
Entering
Condenser
°F/°C
-20 to 70/
-29 to 21.1
80/26.7
90/32.2
100/37.8
Air Temp.
Entering
Condenser
°F/°C
-20 to 70/
-29 to 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
910
840
960
920
850
900
860
790
820
780
720
Based on average ice slab weight of 7.75 - 8.25 lb
Regular cube derate is 7%
Operating Pressures
Air Temp.
Entering
Condenser
°F/°C
-20 to 70/
-29 to 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
910
840
960
920
850
900
860
790
820
780
720
Based on average ice slab weight of 7.75 - 8.25 lb
Regular cube derate is 7%
Operating Pressures
Freeze Cycle
Harvest Cycle
Air Temp.
Entering Discharge Suction Discharge Suction
Condenser Pressure Pressure Pressure Pressure
°F/°C
PSIG
PSIG
PSIG
PSIG
-20 to50/
260-215
40-22
140-185
80-95
-29 to10.0
70/21.1
270-220
42-24
150-190
85-95
80/26.7
285-225
48-24
155-195
85-95
90/32.2
295-235
52-25
165-195
85-100
100/37.8
340-260
55-25
180-205
85-112
110/43.3
385-300
60-27
195-225
90-118
Freeze Cycle
Harvest Cycle
Air Temp.
Entering Discharge Suction Discharge Suction
Condenser Pressure Pressure Pressure Pressure
°F/°C
PSIG
PSIG
PSIG
PSIG
-20 to50/
260-215
40-22
140-185
80-95
-29 to10.0
70/21.1
270-220
42-24
150-190
85-95
80/26.7
285-225
48-24
155-195
85-95
90/32.2
295-235
52-25
165-195
85-100
100/37.8
340-260
55-25
180-205
85-112
110/43.3
385-300
60-27
195-225
90-118
Suction pressure drops gradually throughout the freeze cycle
It is normal for the head pressure control valve to fluctuate up and
down (refer to headmaster diagnostics). Depending on ambient
temperature, low event during hunting may be below published
discharge pressures.
Suction pressure drops gradually throughout the freeze cycle
It is normal for the head pressure control valve to fluctuate up and
down (refer to headmaster diagnostics). Depending on ambient
temperature, low event during hunting may be below published
discharge pressures.
7-32
Part No. 80-1206-3
Section 7
Refrigeration System
SU1000C/CVD1075/CVD1285 SERIES
REMOTE AIR COOLED
NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Entering
Condenser
°F/°C
-20 to 70/
-29 to 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
9.9-10.6
10.8-11.6
11.8-12.6
10.1-10.9
10.6-11.4
11.6-12.5
10.9-11.7
11.5-12.3
12.6-13.5
12.1-13.0
12.8-13.7
14.0-15.0
Harvest
Time
.75-2.5
Times in minutes
24 Hour Ice Production
Air Temp.
Entering
Condenser
°F/°C
-20 to 70/
-29 to 21.1
80/26.7
90/32.2
100/37.8
Water Temperature °F/°C
50/10.0
70/21.1
90/32.2
970
870
790
950
910
820
860
820
740
780
740
670
Based on average ice slab weight of 7.75 - 8.25 lb
Regular cube derate is 7%
Operating Pressures
Freeze Cycle
Harvest Cycle
Air Temp.
Entering Discharge Suction Discharge Suction
Condenser Pressure Pressure Pressure Pressure
°F/°C
PSIG
PSIG
PSIG
PSIG
-20 to50/
260-215
40-22
140-185
80-95
-29 to10.0
70/21.1
270-220
42-22
150-190
85-95
80/26.7
275-230
48-22
155-195
85-95
90/32.2
290-260
52-22
165-195
85-100
100/37.8
325-270
55-24
180-205
85-112
110/43.3
360-300
60-27
195-225
95-118
Suction pressure drops gradually throughout the freeze cycle
It is normal for the head pressure control valve to fluctuate up and
down (refer to headmaster diagnostics). Depending on ambient
temperature, low event during hunting may be below published
discharge pressures.
Part No. 80-1206-3
7-33
Refrigeration System
Section 7
Q1400C/CVD1475 SERIES
REMOTE AIR COOLED
Q1400C/CVD1476 SERIES
REMOTE 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 to 70/
-28.9 to 21.1
90/32.2
100/37.8
110/43.3
Freeze Time
Water Temperature °F/°C
Harvest
Time
50/10.0
70/21.1
90/32.2
11.1-12.6
12.6-14.4
14.4-16.4
11.3-12.9
12.2-13.9
13.5-15.4
12.9-14.7
14.1-16.0
15.8-17.9
14.8-16.8
16.1-18.3
16.3-18.5
.75-2.5
Air Temp.
Entering
Condenser
°F/°C
35 to 70/
1.6 to 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
10.7-12.7
12.4-14.7
14.6-17.3
10.8-12.9
10.9-13.0
10.9-13.0
12.5-14.9
12.6-15.0
12.7-15.0
14.7-17.4
14.8-17.5
14.9-17.6
Harvest
Time
.75-2.5
Times in minutes
Times in minutes
24 Hour Ice Production
24 Hour Ice Production
Air Temp.
Entering
Condenser
°F/°C
-20 to 70/
-28.9 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
1375
1225
1085
1350
1260
1150
1200
1110
1000
1060
980
970
Based on average ice weight of one harvest cycle 12.00-13.5 lb
(6.00-6.75 lb. per evaporator)
Operating Pressures
Freeze Cycle
Harvest Cycle
Air Temp.
Entering Discharge Suction Discharge Suction
Condenser Pressure Pressure Pressure Pressure
°F/°C
PSIG
PSIG
PSIG
PSIG
260-215
42-22
140-185
75-95
-20 to50/
-29 to10.0
70/21.1
275-220
42-24
150-190
75-95
80/26.7
285-225
43-25
155-195
85-95
90/32.2
290-235
44-26
160-195
85-100
100/37.8
335-260
46-28
170-200
85-115
110/43.3
385-310
50-30
180-210
95-125
Suction pressure drops gradually throughout the freeze cycle
It is normal for the head pressure control valve to fluctuate up and
down (refer to headmaster diagnostics). Depending on ambient
temperature, low event during hunting may be below published
discharge pressures.
Air Temp.
Entering
Condenser
°F/°C
35 to 70/
1.6 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
1420
1245
1070
1400
1395
1390
1230
1225
1220
1065
1060
1055
Based on average ice weight of one harvest cycle 12.00-14.0 lb
(6.00-7.00 lb. per evaporator)
Condenser Water Consumption
Condenser 90/32.2 Air Temperature Around Ice Machine
Water Temperature °F/°C
Water
Consumption
50/10.0
70/21.1
90/32.2
Gal/24 hours
1200
2100
4000
Water regulating valve set to maintain 240 psig discharge
pressure
Operating Pressures
Freeze Cycle
Harvest Cycle
Air Temp.
Entering Discharge Suction Discharge Suction
Condenser Pressure Pressure Pressure Pressure
°F/°C
PSIG
PSIG
PSIG
PSIG
265-235
48-28
150-170
70-90
35 to 70/
1.6 to 21.1
80/26.7
265-235
48-28
150-170
70-90
90/32.2
265-235
48-28
150-170
70-90
100/37.8
270-235
49-29
160-180
70-90
110/43.3
275-235
50-30
160-180
75-95
Suction pressure drops gradually throughout the freeze cycle
7-34
Part No. 80-1206-3
Section 7
Refrigeration System
QDUALC/CVD1875 SERIES REMOTE AIR COOLED
QDUALC/CVD2075 SERIES REMOTE 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
10.8-11.6
11.9-12.7
12.8-13.7
12.0-12.9
13.1-14.0
14.9-16.0
13.1-14.0
14.3-15.4
16.2-17.4
14.2-15.22
15.7-16.8
17.4-18.6
Harvest
Time
.75-2.5
Air Temp.
Entering
Condenser
°F/°C
-20 to 70/
-29 to 21.1
Freeze Time
Water Temperature °F/°C
90/32.2
100/37.8
110/43.3
50/10.0
70/21.1
90/32.2
9.7-10.4
10.9-11.7
11.6-12.5
10.1-10.8
11.3-12.1
12.0-12.9
10.8-11.6
12.0-12.9
12.9-13.8
12.0-12.9
12.5-13.4
13.9-14.9
Harvest
Time
.75-2.5
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
1820
1670
1560
1650
1530
1360
1530
1410
1260
1420
1300
1180
Based on average ice slab weight of 15.50-16.50 lb
Regular cube derate is 7%
Operating Pressures
Freeze Cycle
Harvest Cycle
Air Temp.
Entering Discharge Suction Discharge Suction
Condenser Pressure Pressure Pressure Pressure
°F/°C
PSIG
PSIG
PSIG
PSIG
-20 to50/
260-215
42-22
140-185
65-85
-29 to10.0
70/21.1
275-220
42-24
150-190
70-90
80/26.7
285-250
43-25
155-195
70-95
90/32.2
310-265
44-26
160-195
70-100
100/37.8
370-300
46-28
170-200
85-115
110/43.3
395-335
50-30
180-210
90-120
Suction pressure drops gradually throughout the freeze cycle
It is normal for the head pressure control valve to fluctuate up and
down (refer to headmaster diagnostics). Depending on ambient
temperature, low event during hunting may be below published
discharge pressures.
Part No. 80-1206-3
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
2000
1800
1700
1930
1750
1650
1810
1650
1550
1650
1590
1450
Based on average ice slab weight of 15.50-16.50 lb
Regular cube derate is 7%
Operating Pressures
Air Temp.
Entering
Condenser
°F/°C
-20 to50/
-29 to10.0
70/21.1
80/26.7
90/32.2
100/37.8
110/43.3
Freeze Cycle
Discharge
Suction
Pressure Pressure
PSIG
PSIG
Harvest Cycle
Discharge
Suction
Pressure Pressure
PSIG
PSIG
260-215
38-15
130-175
50-70
270-220
280-250
290-255
320-265
360-300
42-16
45-17
48-17
52-18
55-19
140-185
160-205
180-210
180-215
185-220
65-85
65-85
70-85
75-90
85-100
Suction pressure drops gradually throughout the freeze cycle
It is normal for the HPC valve to fluctuate up and down (refer to
headmaster diagnostics). Depending on ambient temperature, low
event during hunting may be below published discharge pressures.
Important
CVD2075 Condensing Units
A scroll compressor must be operated for a
minimum break period of 72 hours before full ice
production capacity will be reached.
7-35
Refrigeration System
Section 7
Refrigerant Recovery/Evacuation and Recharging
Do not purge refrigerant to the atmosphere. Capture
refrigerant using recovery equipment. Follow the
manufacturer’s recommendations.
REFRIGERANT RECOVERY CONNECTIONS
Recovery/Evacuation
1. Place the toggle switch in the OFF position and
disconnect all power to the ice machine and
condensing unit.
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.
2. Install manifold gauges, charging scale, and
recovery unit or two-stage vacuum pump.
3. Open receiver service valve halfway.
4. Open high and low side on the manifold gauge set.
5. Perform recovery or evacuation:
Important
A. Recovery: Operate the recovery unit as directed
by the manufacturer’s instructions.
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.
B. Evacuation prior to recharging: Evacuate to 250
microns. Then, allow the pump to run for an
additional hour. Turn off the pump and perform a
standing vacuum leak check.
CONNECTIONS
Manifold gauge sets must utilize low loss fittings to
comply with U.S. Government rules and regulations.
6. Refer to Charging Procedures
Make these connections:
.
•
Suction side of the compressor through the suction
shut-off valve.
•
Discharge side of the compressor through the liquid
shut-off valve.
CONNECTIONS MUST
BE MADE AT THREE
POINTS FOR COMPLETE
REFRIGERANT
RECOVERY ON ALL
QuietQube® MODELS
•
Receiver service valve, which evacuates the area
between the check valve in the liquid line and the
liquid line solenoid valve.
! Warning
Recovery/evacuation of a QuietQube® remote
system requires connections at three points for
complete system recovery/evacuation. A check
valve is located in the ice machine head section
between the liquid line shut-off valve and the
receiver. The check valve prevents refrigerant
migration from the receiver to the condensing unit in
the off cycle. Connections must be made at three
points (receiver service valve, suction line and liquid
line) to allow recovery and evacuation of the entire
system.
SV1770
Refrigerant Recovery Connections
(Q1400C Shown)
! Warning
The receiver service valve (located in the ice
machine head section) must be accessed during
refrigerant recovery to allow complete removal of
the refrigerant charge.
7-36
Part No. 80-1206-3
Section 7
Refrigeration System
CHARGING PROCEDURES
1. Verify the ICE/OFF/CLEAN toggle switch is in the
OFF position.
2. Close the vacuum pump valve and the low side
manifold gauge valve.
3. Open the charging cylinder and add the proper
refrigerant charge (shown on nameplate) into the
system high side (receiver service valve and
discharge line shut off valve).
4. If the high side does not take the entire charge,
close the high side on the manifold gauge set. Start
the ice machine and add the remaining charge
through the valves on the back of ice making head
or through valves on suction filter, not through low
side service port on condenser as it connects
directly into compressor. Compressor damage can
result.
5. Ensure all refrigerant in the charging hoses is drawn
into the low side of the system, then disconnect the
manifold gauges.
Part No. 80-1206-3
6. Run the ice machine in freeze cycle.
7. Close the receiver service valve in the ice machine
head section.
8. Disconnect the manifold gauge set from the liquid
line shut-off valve.
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.
10. Allow the pressures to equalize while the ice
machine is in the freeze cycle.
11. Disconnect the manifold gauge set from the suction
line shut-off valve.
12. Install and torque all valve caps.
NOTE: Check for refrigerant leaks after all valve caps
have been installed.
7-37
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.
Section 7
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
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
7-38
Part No. 80-1206-3
Section 7
Refrigeration System
Mild System Contamination Cleanup Procedure
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 and suction filter.
3. Cut copper tubing at the outlet of the cool vapor
valve. If burnout deposits are found inside the
tubing, replace the cool vapor valve, TXV and head
pressure control 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.
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.
4. Wipe away any burnout deposits from suction and
discharge lines at compressor.
5. Sweep through the open system with dry nitrogen.
Important
Refrigerant sweeps are not recommended, as they
release CFC’s into the atmosphere.
6. Install a new compressor and new start components.
7. Replace existing suction line filter drier in front of
accumulator.
8. Install a new liquid line drier.
Continued on next page …
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.
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 are no leaks.
5. Charge the system with the proper refrigerant to the
nameplate charge.
6. Operate the ice machine.
Part No. 80-1206-3
7-39
Refrigeration System
Section 7
9. 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.
A. Pull vacuum to 1000 microns. Break the vacuum
with dry nitrogen and sweep the system.
Pressurize to a minimum of 5 psi.
B. Change the vacuum pump oil.
C. Pull vacuum to 500 microns. Break the vacuum
with dry nitrogen and sweep the system.
Pressurize to a minimum of 5 psi.
D. Change the vacuum pump oil.
E. Pull vacuum to 250 microns. Run the vacuum
pump for 1 hour.
10. Charge the system with the proper refrigerant to the
nameplate charge.
11. 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 2 psi, the filterdrier should be adequate for complete cleanup.
B. If the pressure drop exceeds 2 psi, change the
suction line filter-drier and the liquid line drier.
Repeat until the pressure drop is acceptable.
12. Operate the ice machine for 48-72 hours. Then,
remove the suction line drier and change the liquid
line drier.
13. Follow normal evacuation procedures.
7-40
Part No. 80-1206-3
Section 7
Refrigeration System
REPLACING PRESSURE CONTROLS WITHOUT
REMOVING REFRIGERANT CHARGE
3. Cut the tubing of the defective component with a
small tubing cutter.
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.
4. Solder the replacement component in place. Allow
the solder joint to cool.
•
Fan cycle control
•
Water regulating valve
•
High pressure cut-out control
•
High side service valve
•
Low side service valve
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%.
Important
This is a required in-warranty repair procedure.
1. Disconnect power to the ice machine.
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.
Part No. 80-1206-3
7-41
Refrigeration System
Section 7
SV1406
Using Pinch-Off Tool
7-42
Part No. 80-1206-3
Section 7
Refrigeration System
FILTER-DRIERS
Suction Line Filter Drier
Liquid Line Filter Drier
The suction filter traps particulate only and does not
contain a desiccant. The filter needs replacement when:
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.
A Manitowoc filter-drier have a very high moisture
removal capability and a good acid removal capacity.
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:
Liquid Line Driers
Model
Q0600C
IB0600C
Q0800C
IB0800C
Q1000C
IB1000C
SU1000C
Q1400C
QDUALC
End
Connection
Size
Drier
Size
Part
Number
UK-082S
1/4"
89-3024-3
UK-083S
UK-163S
3/8"
3/8"
89-3027-3
89-5816-3
1. The pressure drop across the drier exceeds 2 psig.
2. The total system refrigerant charge has escaped
and the refrigeration system has been exposed to
the atmosphere.
3. A compressor is replaced.
4. Refrigeration system contains contaminants.
Listed below is the recommended OEM field
replacement filter:
Suction Line Filters
Model
CVD0675
CVD0875
CVD1075
CVD1285
CVD1475
CVD1476
CVD1875
CVD2075
Drier
Size
End
Connection
Size
Part
Number
ASF35S5
5/8"
82-5030-3
ASF45S6
3/4"
82-5026-3
ASF45S7
7/8"
82-5027-3
Important
The liquid line drier is covered as a warranty part.
The liquid line drier must be replaced any time the
system is opened for repair.
Part No. 80-1206-3
7-43
Refrigeration System
Section 7
TOTAL SYSTEM REFRIGERANT CHARGES
REFRIGERANT DEFINITIONS
Recover
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.
Model
Q0600C
IB0600C
Q0800C
IB0800C
Q1000C
IB1000C
SU1000C
Q1400C
QDUALC
Condensing Unit
Refrigerant
Charge
(lbs./oz.)
CVD6750
11 lbs. / 176 oz.
CVD875
12 lbs. / 192 oz.
11 lbs. / 176 oz.
CVD1075
CVD1285
12 lbs. / 192 oz.
CVD1475
CVD1476
CVD1875
CVD2075
12.5 lbs. / 200 oz
19 lbs. / 304 oz.
NOTE: All ice machines on this list are charged using
R-404A refrigerant.
Total charge listed is for line set lengths up to 100 feet.
QDUALC Only
Line sets over 50 feet ad 1 lb. for each additional 10 feet
of line set
7-44
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.
Reclaim
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.
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.
Part No. 80-1206-3
Section 7
Refrigeration System
REFRIGERANT RE-USE POLICY
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.
It is not necessary, in or out of warranty, to reduce or
compromise the quality and reliability of your customers’
products to achieve this.
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.
3. Recovered or Recycled Refrigerant
•
Must be recovered or recycled in accordance
with current local, state and federal laws.
•
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:
– 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. 80-1206-3
– 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.
7-45
Refrigeration System
Section 7
THIS PAGE INTENTIONALLY LEFT BLANK
7-46
Part No. 80-1206-3
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
© 2004 Manitowoc Ice, Inc.
Litho in U.S.A.
Download PDF