Manitowoc MULTIPLEX 11M Specifications

Manitowoc MULTIPLEX 11M Specifications
Soda Systems & SuperChil™
Refrigeration Units
Technician’s
Handbook
This manual is updated as new information and models
are released. Visit our website for the latest manual.
www.manitowocfsg.com
America’s Quality Choice in Refrigeration
Part Number STH12 9/10
Safety Notices
As you work on Manitowoc equipment, be sure to pay
close attention to the safety notices in this handbook.
Disregarding the notices may lead to serious injury
and/or damage to the equipment.
Throughout this handbook, you will see the following
types of safety notices:
! 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.
! Caution
Text in a Caution box alerts you to a situation in
which you could damage the equipment. Be sure
to read the Caution statement before proceeding,
and work carefully.
Procedural Notices
As you work on Manitowoc equipment, be sure to read
the procedural notices in this handbook. These notices
supply helpful information which may assist you as
you work.
Throughout this handbook, you will see the following
types of procedural notices:
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
Proper installation, care and maintenance are
essential for maximum performance and troublefree operation of your Manitowoc equipment. If
you encounter problems not covered by this
handbook, do not proceed, contact Manitowoc
Foodservice Group. We will be happy to provide
assistance.
Important
Routine
adjustments
and
maintenance
procedures outlined in this handbook are not
covered by the warranty.
! Warning
PERSONAL INJURY POTENTIAL
Do not operate equipment that has been misused,
abused, neglected, damaged, or altered/modified
from that of original manufactured specifications.
We reserve the right to make product
improvements at any time. Specifications and
design are subject to change without notice.
Table of Contents
General Information
Model Numbers . . . . . . . . . . . . . . . . . . . . . 9
How to Read a Model Number . . . . . . . . . 10
Accessories . . . . . . . . . . . . . . . . . . . . . . . 10
Special Applications . . . . . . . . . . . . . . . . 11
Model/Serial Number Location . . . . . . . . 11
Warranty Information . . . . . . . . . . . . . . . . 11
Installation
Pre-installation Checklist . . . . . . . . . . . . . 13
Top Mounted Ice Maker Installations . . . 15
S250-M Dimensions . . . . . . . . . . . . . . . . . 16
MII-250 Dimensions . . . . . . . . . . . . . . . . . 18
MII-302 Dimensions . . . . . . . . . . . . . . . . . 20
MII-250 Installation Kit . . . . . . . . . . . . . . . 22
MII-302 Installation Kit . . . . . . . . . . . . . . . 23
Refrigeration Units . . . . . . . . . . . . . . . . . . 25
Safe Installation Dos and Don’ts . . . . . . . 28
Location Requirements . . . . . . . . . . . . . . 30
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Plumbing/Water Supply . . . . . . . . . . . . . . 38
Preparing Ice Bank – Non-ERC . . . . . . . . 39
Preparing Ice Bank with ERC . . . . . . . . . 41
Component Identification
Typical System . . . . . . . . . . . . . . . . . . . . . 43
Connections . . . . . . . . . . . . . . . . . . . . . . . 44
Maintenance
Maintenance Schedule . . . . . . . . . . . . . . . 49
Cleaning and Sanitizing the Dispensing
Valves and Product Lines . . . . . . . . . . . . 54
Sanitizing . . . . . . . . . . . . . . . . . . . . . . . . . 58
Shipping, Storage and Relocation . . . . . 62
Operation
How the Multiplex Works . . . . . . . . . . . . . 63
Differences Between the TS & SS Units . 64
Equipment Setup Procedure (Non-ERC) 71
Part Number STH12 9/10
5
Start-up (Non-ERC) . . . . . . . . . . . . . . . . .
Sequence of Operation (Non-ERC) . . . .
Start-up (with ERC) . . . . . . . . . . . . . . . . .
Sequence of Operation (with ERC) . . . .
Equipment Setup Procedure (with ERC)
Equipment Close Procedure — All Units
72
74
76
78
82
84
Troubleshooting
Electronic Refrigeration Control (ERC) Model
Error Codes . . . . . . . . . . . . . . . . . . . . . . . 87
Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Problem Cross-reference Guide . . . . . . . 100
CO2 Gas System . . . . . . . . . . . . . . . . . . . 101
Carbonated Water System . . . . . . . . . . . 104
Circulating System . . . . . . . . . . . . . . . . . 111
Compressed Air System . . . . . . . . . . . . . 112
Dispensing Valve and Tower . . . . . . . . . 114
Electrical System . . . . . . . . . . . . . . . . . . . 119
Refrigeration System . . . . . . . . . . . . . . . . 120
Syrup System . . . . . . . . . . . . . . . . . . . . . . 123
Water Booster System . . . . . . . . . . . . . . 125
Water Filter System . . . . . . . . . . . . . . . . . 127
When the Brix is OFF . . . . . . . . . . . . . . . 128
Component Check Procedures
Test Procedures: MPC 64A Timer/Selection
Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Dual Transformers . . . . . . . . . . . . . . . . . 133
New MPC84A Portion Control Board . . . 134
MOVs Field Testing . . . . . . . . . . . . . . . . . 140
Test Procedures: MPC84C Timer/Selection
Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Back-flow Preventer Maintenance . . . . . 144
Head Pressure Control Valve . . . . . . . . . 145
Charging Multiplex Remote Refrigeration
Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Compressor & Remote Condenser . . . . 148
Agitator Condenser . . . . . . . . . . . . . . . . . 149
Carbonation System A or B . . . . . . . . . . 150
Circulation System A or B . . . . . . . . . . . 151
ERC Control Board, Keypad & Display . 152
Programming / Auto Set . . . . . . . . . . . . . 153
6
Part Number STH12 9/10
ERC Component (Output) Connector Layout
154
ERC Sensor (Input) Connector Layout . 154
Component Specifications
Refrigeration Unit Specifications . . . . . . 155
S-250M Specifications . . . . . . . . . . . . . . . 156
MII-302 Specifications . . . . . . . . . . . . . . . 156
Charts
Refrigerant Charge . . . . . . . . . . . . . . . . . . 157
Operating Pressures . . . . . . . . . . . . . . . . 161
McDonald’s Models History . . . . . . . . . . . 163
Sustained Draw Curve Charts . . . . . . . . . 164
Diagrams
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . 167
Soda Wiring Diagrams . . . . . . . . . . . . . . . 185
Super-Chil Wiring Diagrams . . . . . . . . . . 200
Circuit Schematics . . . . . . . . . . . . . . . . . . 212
Ice/Beverage Units Diagrams . . . . . . . . . 231
Part Number STH12 9/10
7
This Page Intentionally Left Blank
8
Part Number STH12 9/10
General Information
Model Numbers
This manual covers the following models:
(A) Air Cooled
(W) Water Cooled
(R) Remote Cooled
2803A04
2803W04
2803R04
2803AX04
2803WX04
2803RX04
2803A04
2803W04
2803R04
11MA04
11MW04
11MR04
11MAX04
11MAW04
11MRX04
11MA04
11MW04
11MR04
42MA04
42MW04
42MR04
42MAX04T
42MWX04T
42MRX04T
44MA04
44MW04
44MR04
44MAX04T
44MWX04T
44MRX04T
44EAX04T
44EWX04T
44ERX04T
50MA04
50MW04
50MR04
50MAX04
50MWX04
50MRX04
50MA04Q/T
50MW04Q/T
50MR04Q/T
SC180A
SC180W
SC180R
SC180AX
SC180WX
SC180RX
SC340A
SC340W
SC340R
SC340AX
SC340WX
SC340RX
SC1000A
SC1000W
SC1000R
SC1000AX
SC1000WX
SC1000RX
SC2000A
SC2000W
SC2000R
SC2000AX
SC2000WX
SC2000RX
Ice/Beverage Dispensers
MII-302
Part Number STH12 9/10
S-250M
9
How to Read a Model Number
Condenser
Type
Model Base
Model Prefix
Model Suffix
11M A 04 x
2803 & SC180 - 1/3 hp
11M & SC340 - 1/2 hp
44M, 42M & SC1000 - 1 hp
44E - 1 hp, TUV Approved
50M & SC2000 - 2.2 hp
Special Configuration
04 - R404a refrigerant
A - Air-cooled
AX - Air-cooled, international
R - Remote
RX - Remote, international
W - Water-cooled
WX - Water-cooled, international
ICE/BEVERAGE MODEL NUMBERS
Model Base
Model Prefix
Model Suffix
S–250–M
S - Ice/Beverage
Dispenser
MII - Ice/Beverage
Dispenser
M - Multiplex
Ice Capacity
Accessories
Depending on store type and location, various optional
equipment (such as CO2 Panel, water filter kit, water
booster kit, etc.) may be added to this system. Install
and connect any optional equipment in the desired
location according to the installation instructions
provided with these kits/equipment.
10
Part Number STH12 9/10
Special Applications
ATTENTION: MARINE INSTALLATIONS
! Warning
This unit is for use on vessels over 66 ft (20 m) in
length. This unit must not be installed in the engine
space of a gasoline-powered ship.
NOTE: This unit must be secured to the vessel during
installation. Models with part numbers beginning with
the letters TS are NOT marine listed.
OUTDOOR APPLICATIONS
TS Multiplex Beverage Recirculating units are
approved and listed by Underwriters Laboratories
(UL). However they are not UL approved for weather
exposure applications. These units must be installed in
areas where adequate protection from the elements is
provided, all other models are ETL listed.
! Warning
Personal Injury Potential
Do not operate equipment that has been misused,
abused, neglected, damaged, or altered/modified
from that of original manufactured specifications.
Model/Serial Number Location
These numbers are required when requesting
information from your local Manitowoc Distributor,
service representative, or Manitowoc Foodservice.
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 unit.
Warranty Information
Consult your local distributor for terms and conditions
of your warranty. Your warranty specifically excludes
all beverage valve brixing, general adjustments,
cleaning, accessories and related servicing.
Part Number STH12 9/10
11
Your warranty card must be returned to activate the
warranty on this equipment. If a warranty card is not
returned, the warranty period can begin when the
equipment leaves the factory.
No equipment may be returned without a written
Return Materials Authorization (RMA). Equipment
returned without an RMA will be refused at the dock
and returned to the sender at the sender’s expense.
Please contact your local distributor for return
procedures.
12
Part Number STH12 9/10
Installation
Pre-installation Checklist
When installing any system, first make sure the major
components are available. Generally the major
components necessary for an installation are:
B-I-B System also:
B-I-B connectors
B-I-B regulator set
B-I-B rack
B-I-B syrup boxes
Bulk Syrup System also:
Syrup connectors for Bulk tank
Gas connectors for Bulk tank
Bulk syrup tanks
Part Number STH12 9/10
13
Post Mix System:
CO2 regulator set
Beverage dispenser
Beverage tubing
CO2 tank
Carbonator
Stepless (Oetiker) clamps
Chain for CO2 tank
Double Check:
Do you have enough space to install the
dispenser or a dispenser and top mounted
cuber?
Does top mounted cuber (if utilized) have a
minimum of 6 inches (15.3 cm) clearance on
all sides?
Is the countertop level?
Can the countertop support the weight of the
dispenser, or the dispenser/cuber
combination plus the weight of the stored
ice?
14
Part Number STH12 9/10
Also consider the location of the following items
before installation:
Water line
Drain
Power outlet
Heating and air conditioning ducts
Top Mounted Ice Maker Installations
Location — Avoid placing the dispenser
and/or ice machine near heat sources such
as radiators, ovens, refrigeration equipment
and direct sunlight.
Clearances — Six inch (15.2 cm) clearance
on all sides of the icemaker is needed.
Front of icemaker to be flush with front of
dispenser — The front of the icemaker must
be flush with the front of the dispenser. When
the icemaker is flush with the front of the
dispenser, some icemakers may overhang at
the back of the dispenser.
Drains — A separate drain line is required
for the ice machine, in addition to a drain line
for the ice/beverage dispenser.
Dispensers require an adapter kit to install
some top-mounted icemakers. Contact your
local distributor for the correct adapter kit.
Part Number STH12 9/10
15
S250-M Dimensions
A
39.81"
(101.1 cm)
B
30.00"
(76.2 cm)
C
9.94"
(25.2 cm)
D
4.44"
(11.3 cm)
E
22.63"
(57.5 cm)
F
28.00"
(71.1 cm)
G
31.13"
(79.1 cm)
H
20.00"
(50.8 cm)
I
27.44"
(69.7 cm)
A
B
C
D
E
F
G
H
I
16
Part Number STH12 9/10
S250-M FOOTPRINT
A
B
D
Maximum
Area for
Cutout
C
I
E
G
Minimum Area
for Cutout
J
H
F
A
B
C
D
E
30.00"
(76.2 cm)
26.00"
(66.0 cm)
8.00"
(20.3 cm)
7.30"
(18.5 cm)
11.00"
(27.9 cm)
F
G
H
I
J
15.00"
(38.1 cm)
20.81"
(52.8 cm)
3.00"
(7.6 cm)
22.81"
(57.9 cm)
31.13"
(79.1 cm)
Part Number STH12 9/10
17
MII-250 Dimensions
Front View
A
B
A
39.00"
(99.1 cm)
B
12.50"
(31.8 cm)
C
30.00"
(76.2 cm)
D
1.50"
(3.8 cm)
E
9.94"
(25.2 cm)
F
13.50"
(34.3 cm)
G
20.00"
(50.8 cm)
H
30.50"
(77.5 cm)
K
28.38"
(72.1 cm)
L
22.50"
(57.2 cm)
M
21.69"
(55.1 cm)
N
1.75"
(4.4 cm)
P
28.44"
(72.2 cm)
C
Back View
D
E
F
G
Bottom View
H
K
L
M
N
18
3/8"-16
Thread
Mounting
Holes for
optional
legs
P
Part Number STH12 9/10
MII-250 FOOTPRINT
A
3/8"-16
Thread
Mounting
Holes for
Optional
Legs
Minimum
area for
Cutout:
Install
conduit to
the back of
opening to
allow
forward
movement
for service
of flex
manifold.
B
Maximum Area
for Cutout
C
D
I
F
H
J
E
3/4" NPT
Fitting
Drainpan
G
A
B
C
D
E
30.00"
(76.2 cm)
26.00"
(66.0 cm)
8.00"
(20.3 cm)
8.00"
(20.3 cm)
11.00"
(27.9 cm)
F
G
H
I
J
12.00"
(30.5 cm)
13.50"
(34.3)
22.00"
(55.9cm)
24.00"
(61.0 cm)
31.00"
(78.7 cm)
Part Number STH12 9/10
19
MII-302 Dimensions
A
B
A
33.25"
(84.5 cm)
B
12.50"
(31.8 cm)
C
42.75"
(108.6 cm)
D
1.38"
(3.5 cm)
E
5.59"
(14.2 cm)
F
9.10"
(23.1 cm)
G
12.16"
(30.9 cm)
H
31.00"
(78.7)
J
15.78"
(40.1 cm)
K
28.78"
(73.1 cm)
L
22.50"
(57.2 cm)
M
0.82"
(2.1 cm)
N
26.97"
(68.5 cm)
O
30.47"
(77.4 cm)
P
33.75"
(85.7 cm)
Q
37.16"
(94.4 cm)
C
L
K
H
D
F
E
M
G
J
N
O
P
Q
20
Part Number STH12 9/10
MII-302 FOOTPRINT
A
B
Maximum Area
for Cutout
C
Minimum area
for Cutout: Install
conduit to the back of
opening to allow forward
movement for service of
flex manifold.
E
D
J
I
F
K
3/4" NPT Fitting
Drainpan
0.50
(1.3)
Cutouts for Extended
Splash Panel Drain Tube
H
G
A
B
C
D
42.75"
(108.6 cm)
38.75"
(98.4 cm)
8.00"
(20.3 cm)
8.00"
(20.3 cm)
E
F
G
H
17.38"
(44.1 cm)
12.00"
(30.5 cm)
8.54"
(21.7 cm)
12.63"
(32.1 cm)
I
J
K
20.50"
(52.1 cm)
24.00"
(61.0 cm)
31.00"
(78.7 cm)
Part Number STH12 9/10
21
MII-250 Installation Kit
Syrup Tubes
to Valves
Carb Water to
Left Manifold
Plain Water to
Left Manifold
Carb Water to
Right Manifold
Plain Water to
Right Manifold
1/2" ID Tubing
from Conduit (5X)
3/8" ID Tubing
from Conduit (7X)
Use Only for
One Conduit
Plain Water
Line
Use Only for
Two Conduit
Carb Water
Line
Countertop
To Conduit
No. Part Number
Description
Qty.
1
00854998
Ell 1/2 x 3/8 Barb SS
2
2
00861304
Splicer 3/8 x 3/8 Barb
7
3
00861306
Splicer 1/2 x 1/2 Barb
3
4
5018595
Splicer Elbow SS 1/2 x 1/2
2
5
5030996
Elbow 1/4 x 3/8 Barb SS
7
6
5030997
Elbow 1/4 x 1/2 Barb SS
1
7
5030998
U-bend 1/2 x 1/2 WI - 1/2 Stem
3
22
Part Number STH12 9/10
MII-302 Installation Kit
Carb Water to
Left Manifold
Plain Water to
Left Manifold
Syrup Tubes
to
Valves
Carb Water
to Right
Manifold
1/2" ID Tubing
from Conduit (9X)
Plain Water
to Right
Manifold
3/8" ID Tubing
from Conduit (7X)
Use Only
for One
Conduit
Plain
Water
Line
Use Only
for Two
Conduit
Carb
Water
Line
Countertop
To Conduit
No. Part Number
Description
Qty.
1
00854998
Ell 1/2 x 3/8 Barb SS
2
2
00861304
Splicer 3/8 x 3/8 Barb
6
3
00861306
Splicer 1/2 x 1/2 Barb
6
4
5011751
Fitting 3/8" Y Barb
1
5
5018595
Splicer Elbow SS 1/2 x 1/2
2
6
5030996
Elbow 1/4 x 3/8 Barb SS
8
7
5030997
Elbow 1/4 x 1/2 Barb SS
4
8
5030998
U-bend 1/2 x 1/2 WI - 1/2 Stem
3
WATER AND SYRUP LINES
This kit facilitates connecting the unit to a 12-16 line
conduit, with one or two carbonated water recirculating
systems, and one or two plain water supply lines, and
maximum 8 syrup product lines.
The unit is shipped with connecting lines terminating
under the unit. It will be necessary to make a 90° turn
Part Number STH12 9/10
23
down through the counter top, to connect to the
conduit. It will also be necessary to fully insulate this
new added section before passing through the counter
top, or before hooking to main conduit.
CARB WATER LINES
• Unit has two carb water lines, one for each flex
manifold.
• Use 2 @ 1/2" x 1/2" elbow and 6-12" of 1/2"
conduit tubing to make connection bend from unit
down through hole in counter top, to mate with
conduit.
• Conduit with only two circulating carb water lines.
• Use two @ 1/2" barb U-bend adapters (invert one)
to connect the two carb circulating lines from
conduit to the two carb water lines from the unit.
Use short 1/2" conduit line to connect the two
U-bends as shown (item #8).
• Conduit with four, two sets of recirculating carb
water lines.
• Use two @ 1/2" barb U-bend adapters, to connect
each set of circulating conduit lines to each carb
water line from unit as shown (8).
PLAIN WATER LINES
• Unit has two plain water lines, one for each flex
manifold.
• Use two @ 3/8" x 1/2" elbows and 6-12" of 1/2"
conduit tubing to make connection bend from unit
down through hole in counter top, to mate with
conduit.
• Conduit with only one plain water line.
• Use one @ 1/2" U-bend adapter, to connect the
two plain water lines to one plain water line from
conduit (item #3).
• Conduit has two plain water lines.
• Use two @ 1/2" straight adapters to connect each
plain water line from unit to each plain water line
from conduit as shown (3).
24
Part Number STH12 9/10
SYRUP LINES
• Unit has eight syrup lines.
• Use seven @ 1/4 x 3/8" and one @ 1/4 x 1/2"
elbows and proper size conduit tubing to make
connection bend from unit down through hole in
counter top, to mate with conduit.
• FULLY INSULATE (no air gaps) and finish with
tape wrap, all these connections from unit, through
90° bend connection and down close to straight
conduit connection. Locate unit properly on
counter, and secure to counter. Finish connections
to conduit with 3/8" x 3/8" and 1/2" x 1/2" straight
barb connectors, and U-bend adapters, as
needed.
• FULLY INSULATE and finish with tape wrap all
these connections to the conduit.
Refrigeration Units
•
•
•
Refrigeration units require stand or 6" (15.2 cm)
legs. Refrigeration unit cannot be placed directly
on floor.
Conduit can be run through floor or ceiling chase.
Syrup supply can be located on stand or adjacent
to refrigeration unit.
CLEARANCES
Control Side (Right)
18" (45.7 cm)
Tower Connection Side (Left)
12" (30.5 cm)
Back Side
6" (15.2 cm)
Ceiling
18" (45.7 cm)
Part Number STH12 9/10
25
REMOTE CONDENSER LINESET REQUIREMENTS
Important
If you have a MAC Multi-Pass condenser please
add three (3) pounds additional charge.
Important
If you exceed the 100ft line set length add
.72oz/ft of line set run (one way) for every foot
over 100ft, to the UNIT charge
1. Both the discharge and liquid remote condensing
lines must be kept to a minimum distance for
maximum performance. All Multiplex systems are
capacity rated to 100 ft (30.5 m) tubing distance
between the compressor and condenser. If you
have another brand condenser, please add
additional charge for the condenser (example: up
to three (3) pounds for a MAC condenser).
2. Any vertical rise 25 ft (7.62 m) or greater must
have a manufactured or installed trap (bend), in
the discharge refrigeration line from the
compressor to the remote condenser. A trap is
necessary for every additional 25 ft (7.62 m)
vertical rise. When excessive vertical rise exists,
this trap allows oil to reach the condenser and
return to the compressor.
26
Part Number STH12 9/10
3. The easiest method to create a trap is to bend the
tubing (smoothly, no kinks) into the trap form.
Discharge Line
Condenser Trap
To the
Condenser
3" (7.6 cm) x 6" (15.2 cm)
Maximum Trap Area
Discharge Line Trap Every
25 Vertical ft. (7.62 m)
Compressor
3 ft (.9 m) (minimum) of Discharge
Line Trap at the Compressor
4. The trap(s) must be of minimum height of 3"
(7.6 cm) and a width of 6" (15.2 cm) to minimize oil
accumulation. The traps can also be bent out of the
refrigeration tubing. Carefully bend the tubing down
12", and then sweep the tubing back up.
5. It is critical that the remote condensing line size
specifications for the specific model be
maintained. The specifications are 1/2" discharge
and 3/8" liquid lines.
Part Number STH12 9/10
27
Safe Installation Dos and Don’ts
! Warning
Read the following warnings before beginning an
installation. Failure to do so may result in
possible death or serious injury.
• Adhere to all National and Local Plumbing
and Electrical Safety Codes.
• Turn OFF incoming electrical service
switches when servicing, installing, or
repairing equipment.
• DO NOT throw or drop a CO2 cylinder.
Secure the cylinder(s) in an upright position
with a chain.
• DO NOT store CO2 cylinders in temperature
above 125°F (51.7°C) near furnaces, radiator
or sources of heat.
! Warning
DO NOT connect the CO2 cylinder(s) directly to
the product container. Doing so will result in an
explosion causing possible death or injury. It is best
to connect the CO2 cylinder(s) to a regulator(s).
! Warning
Carbon Dioxide (CO2) displaces oxygen. Exposure
to a high concentration of CO2 gas causes tremors,
which are followed rapidly by loss of consciousness
and suffocation. If a CO2 gas leak is suspected,
particularly in a small area, immediately ventilate the
area before repairing the leak. CO2 lines and pumps
must not be installed in an enclosed space. An
enclosed space can be a cooler or small room or
closet. This may include convenience stores with
glass door self serve coolers. If you suspect CO2
may build up in an area, venting of the BIB pumps
and/or CO2 monitors must be utilized.
28
Part Number STH12 9/10
•
DO check that all flare fittings are tight. This check
must be performed with a wrench to ensure a
quality seal.
• DO inspect pressure on regulators before starting
up equipment.
• DO protect eyes when working around
refrigerants.
• DO use caution when handling metal surface
edges of all equipment.
• DO handle CO2 cylinders and gauges with care.
Secure cylinders properly against abrasion.
• DO store CO2 cylinder(s) in well ventilated areas.
• DO NOT exhaust CO2 gas (example: syrup pump)
into an enclosed area, including all types of walk-in
coolers, cellars, and closets.
• DO NOT release CO2 gas from old cylinder.
• DO NOT touch refrigeration lines inside units;
some may exceed temperatures of 200°F
(93.3°C).
NOTE: All utility connections and fixtures must be
sized, installed, and maintained in accordance with
Federal, State, and Local codes.
Part Number STH12 9/10
29
30
Model 11M
100 ft / 30 m
Maximum
Conduit Length
Model 44M
250 ft / 80 m
Maximum
Conduit Length
Model 44M
250 ft / 80 m
Maximum
Conduit Length
Model 50M
350 ft / 107 m
Maximum
Conduit Length
Up to 12 gal / 45 L
of syrup/day or
560 drinks/day
(4,000 gal/year)
Up to 21 gal / 79 L
of syrup/day or
980 drinks/day
(7,500 gal/yr)
Up to 32 gal / 121 L
of syrup/day or
1400 drinks/day
(11,500 gal/yr)
Up to 42 gal / 159 L
of syrup/day or
2000 drinks/day
(15,000 gal/yr)
2
Model 50M
350 ft / 107 m
Maximum
Conduit Length
Model 44M
250 ft / 80 m
Maximum
Conduit Length
Model 44M
250 ft / 80 m
Maximum
Conduit Length
Model 11M
100 ft / 30 m
Maximum
Conduit Length
Model 11M
100 ft / 30 m
Maximum
Conduit Length
3
Model 50M
350 ft / 107 m
Maximum
Conduit Length
Model 50M
350 ft / 107 m
Maximum
Conduit Length
Model 44M
250 ft / 80 m
Maximum
Conduit Length
Model 44M
250 ft / 80 m
Maximum
Conduit Length
Model 44M
250 ft / 80 m
Maximum
Conduit Length
4
Model 50M
350 ft / 107 m
Maximum
Conduit Length
Model 50M
350 ft / 107 m
Maximum
Conduit Length
Model 44M
250 ft / 80 m
Maximum
Conduit Length
Model 44M
250 ft / 80 m
Maximum
Conduit Length
Model 44M
250 ft / 80 m
Maximum
Conduit Length
* Care must be taken when selecting the proper refrigeration unit. Above selections are for 75°F
(24°C) conditions, 16 ounce (470 ml) drinks, and average business cycles. Other factors such as
lunch or dinner peak periods, large drinks, or high ambient conditions may require the next larger
size unit. Contact your Manitowoc Company Authorized Distributor or Manitowoc Beverage Systems
(MBS) for more information.
Model 2803
40 ft / 12 m
Maximum
Conduit Length
Up to 6 gal / 3 L
of syrup/day or
280 drinks/day
(2,000 gal/yr)
Number of Dispensing Stations
1
Business Level*
Location Requirements
SODA REFRIGERATION UNIT “QUICK-PICK”
SELECTION CHART
Part Number STH12 9/10
Select a location for the refrigeration unit that meets
the requirements of the building plans, local codes,
and personnel. The unit must be positioned for free
airflow as well as for future service. The following
minimum requirements must be met:
• 100 GPH (379 LTR/hr) potable water supply
Models 2803/11/38; 200 GPH (757 LTR/hr) potable
water supply Models 44/50
• Beverage quality CO2 gas (bulk or bottled supply)
with a minimum 3/8" (.96 cm) line
• One Bag-In-Box (BIB) container of each post mix
syrup flavor.
NOTE: Refer to nameplate on side of refrigeration unit
for voltage and amperage specifications. Make all
electrical connections at the junction box located at the
top rear of unit. Optional equipment may require
additional power supplies.
NOTE: Potable water connections to the equipment
must comply with local plumbing code requirements,
particularly the back-flow prevention requirements.
PLUMBING REQUIREMENTS – GENERAL
Incoming water supply must be provided before
installation of the refrigeration unit and must comply
with local plumbing requirements.
1. A minimum 1" (2.54 cm) water supply line with a
manual shut-off valve must be plumbed at least
6 ft (183 cm) from the unit. The incoming water
supply pressure must not exceed 70 psi static
(4.8 bar) and be no less than 40 psi (2.8 bar)
dynamic. If supply water pressure is greater than
70 psi (5 bar), a water regulator will be required.
2. Locate the drain hose, bracket, and two screws
provided in the installation kit. Attach the drain
hose to the water bath overflow tube located on
the bottom of the refrigeration unit.
Part Number STH12 9/10
31
3. Connect the water manifold supply line, located
on the bulkhead panel in the motor compartment
to the main water supply. The main water supply
shut-off valve must remain in the OFF position. If
a water filter is to be installed, connect the line to
the outlet fitting of the filter. Plumb according to
applicable plumbing codes.
Bracket
Bottom
of Unit
Screw
Drain Hose
Drain Hose Connection
4. When a water cooled condenser is installed, a
copper supply line (not supplied with unit) must be
plumbed to the 3/8" (.965 cm) male flare fitting
installed in the water shut-off assembly. The
shut-off must be placed in the OFF position. A
copper drain line (not supplied) is to be connected
to the outlet fitting of the water cooled condenser
and routed to the floor drain.
32
Part Number STH12 9/10
WATER SUPPLY
1. Use the built in fill valve that is already plumbed
into the unit.
2. An appropriate floor drain is required within 6 ft
(2 m) of the unit.
3. Potable water connections to the equipment must
comply with the basic plumbing code of the
Building Officials and Code Administrators
International, Inc. (BOCA) and the Food Service
Sanitation Manual of the Food and Drug
Administration. Verify local plumbing code
requirements.
Part Number STH12 9/10
33
Electrical
GENERAL
! Warning
All wiring must conform to local, state and
national codes.
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 unit’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.
ELECTRICAL REQUIREMENTS
Refer to unit’s Model/Serial Plate for
voltage/amperage specifications.
34
Part Number STH12 9/10
Part Number STH12 9/10
120/60/1
230/50/1
120/60/1
230/50/1
208-230/60/1
230/50/1
120* /208-230/60/3
230/400/50/3
208-230/60/3
230/400/50/3
2803 &
SC180
11M &
SC340
44M,
42M &
SC1000
50M
SC2000
25.2
11.6
25.2
11.6
20.6
20.6
21.5
10.7
20.3
9.0
Minimum
Circuit Amps
20A
15A
30A
20A
30A
25A
30A
16A
25A
16A
Breaker
2.2 hp
2.0 kW
2.2 hp
2.0 kW
1 hp
1.9 kW
1/2 hp
.97 kW
1/3 hp
.46 kW
Compressor
* Only the model 50M with SS part numbers have 120V components, the TS does not.
Volt/Cycle/Phase
Model
SPECIFICATIONS
35
GROUNDING INSTRUCTIONS
! Warning
The unit must be grounded in accordance with
national and local electrical codes.
This appliance must be grounded. In the event of
malfunction or breakdown, grounding provides a path
of least resistance for electric current to reduce the risk
of electric shock.
NOTE: The refrigeration units are not equipped with a
cord.
! Warning
Improper connection of the equipment-grounding
conductor can result in a risk of electric shock.
The conductor with insulation having an outer
surface that is green with or without yellow stripes
is the equipment grounding conductor. If repair or
replacement of the cord or plug is necessary, do
not connect the equipment-grounding conductor
to a live terminal. Check with a qualified
electrician or serviceman if the grounding
instructions are not completely understood, or if
in doubt as to whether the appliance is properly
grounded. Do not modify the plug provided with
the appliance — if it will not fit the outlet, have a
proper outlet installed by a qualified electrician.
36
Part Number STH12 9/10
! Warning
When
using
electric
appliances,
basic
precautions must always be followed, including
the following:
a. Read all the instructions before using the
appliance.
b. To reduce the risk of injury, close supervision
is necessary when an appliance is used near
children.
c. Do not contact moving parts.
d. Only use attachments recommended or sold
by the manufacturer.
e. Do not use outdoors.
f. For a cord-connected appliance, the
following shall be included:
• Do not unplug by pulling on cord. To
unplug, grasp the plug, not the cord.
• Unplug from outlet when not in use and
before servicing or cleaning.
• Do not operate any appliance with a
damaged cord or plug, or after the
appliance malfunctions or is dropped or
damaged in any manner. Contact the
nearest authorized service facility for
examination, repair, or electrical or
mechanical adjustment.
g. For a permanently connected appliance —
Turn the power switch to the off position
when the appliance is not in use and before
servicing or cleaning.
h. For an appliance with a replaceable lamp —
Always unplug before replacing the lamp.
Replace the bulb with the same type.
i. For a grounded appliance — Connect to a
properly grounded outlet only. See
Grounding Instructions.
Part Number STH12 9/10
37
Plumbing/Water Supply
PLUMBING POTABLE WATER
Model
Required
Water
Pressure
Drain
Connections
Water
Supply
2803 &
SC180
40 – 70 psig
(2.8 – 4.9 bar)
3/4" ID
within 6 ft (2 m)
3/8" ID
EVA Line
11M &
SC340
40 – 70 psig
(2.8 – 4.9 bar)
3/4" ID
within 6 ft (2 m)
3/8" ID
EVA Line
44M,
42M &
SC1000
40 – 70 psig
(2.8 – 4.9 bar)
3/4" ID
within 6 ft (2 m)
1/2" ID
EVA Line
50M
40 – 70 psig
(2.8 – 4.9 bar)
3/4" ID
within 6 ft (2 m)
1/2" ID
EVA Line
SC2000
40 – 70 psig
(2.8 – 4.9 bar)
3/4" ID
within 6 ft (2 m)
1/2" ID
EVA Line
A 1" (2.54 cm) ID copper inlet water line equipped with
a 3/4" (1.905 cm) FPT adapter with shut-off must be
supplied by plumber at rear of equipment. Appropriate
floor drains must be provided within 6 ft (183 cm) of
each unit installed.
NOTE: The carbonator in this unit is provided with a
dual check valve type back-flow preventer, which
conforms to ASSE 1032. The Model 50M & 44M
vented backflow preventer conforms to ASSE 1022.
Potable water connections to the equipment must
comply with the basic plumbing code of the Building
Officials and Code Administrators International, Inc.
(BOCA) and the Food Service Sanitation Manual of
the Food and Drug Administration. Verify local
plumbing code requirements.
38
Part Number STH12 9/10
Preparing Ice Bank – Non-ERC
BUILDING AN ICE BANK
1. At this time, fill the unit water bath tank to the top,
or within 1/2" (1.3 cm) of the top minimum, of the
overflow tube. Use a garden hose or another
water supply to do this.
NOTE: A manual fill valve is incorporated into the
water circuit to the carbonator tank. This valve can be
used to manually add water lost for any reason. Do not
leave this valve ON constantly, only use it for filling and
topping off. The water bath must be drained, flushed,
and refilled every six months.
2. Turn ON the switch labeled “Refrigeration”. Allow
unit to run for about 15 minutes before proceeding
to step 3.
3. Turn ON the switch labeled “Agitator”.
NOTE: Turn this switch OFF to perform any operations
in the water bath area.
With water bath water temperature of 65°F (18°C), ice
will begin to form on the evaporator coils in
approximately 2 hours. The unit will build a full ice
bank in approximately 4 to 6 hours (depending on
ambient water temperature).
Water Bath
Tank
Tab
Clamp
Overflow
Tube
Drain Tube
4. Before turning on the carbonator or circulator
switch, verify that the pump box assembly has
been mounted and connected to the unit and the
appropriate syrup and water has been supplied.
Part Number STH12 9/10
39
5. Turn on the main water supply to the booster
assembly. Verify the booster is plugged in and
that the accumulator tank valve is open. (If the
system has an optional “Out-of-Syrup” device,
verify that it is unplugged.)
6. Verify the pump is running. Place the valve on the
right side of the pump box in the purge position
until all air bubbles have passed through the line.
Turn the valve back to “dispense”. Plug the
Out-of-Syrup device power cord into an
appropriate wall outlet at this time (if supplied).
NOTE: Verify that the pump box holding tank is full
before proceeding.
7. Turn on the circulator and carbonator switches.
The carbonator must run for approximately 1 to 3
minutes and shut off. The circulator must run
continuously. Verify that water is returning to the
water bath through the return bulk head fitting.
Important
Wait until a thin layer of ice has begun to form on
the evaporator before proceeding any further.
8. Go to the tower(s) and brix the valves. Using a
syrup separator and volume cup, adjust the flow
rate of the carbonated water to two fluid ounces
per second. Then, using the separator and a brix
cup, adjust the syrup flow rate for a ratio of
carbonated water to syrup.
40
Part Number STH12 9/10
Preparing Ice Bank with ERC
BUILDING AN ICE BANK
1. At this time, fill the unit water bath tank to the top,
or within 1/2" (1.3 cm) of the top minimum, of the
overflow tube. Use a garden hose or another
water supply to do this.
NOTE: A manual fill valve is incorporated into the
water circuit to the carbonator tank. This valve can be
used to manually add water lost for any reason. Do not
leave this valve ON constantly, only use it for filling and
topping off. The water bath must be drained, flushed,
and refilled every six months.
2. Main power to unit must be on. Power delay of 30
seconds occurs when power applied. “Pd30”
3. Press COMP/AGIT switch on keypad display.
4. Agitator will come on immediately and
compressor delay will start. “Cd99” will count from
180 to 0.
NOTE: Turn this switch OFF to perform any operations
in the water bath area.
With water bath water temperature of 65°F (18°C), ice
will begin to form on the evaporator coils in
approximately 2 hours. The unit will build a full ice
bank in approximately 4 to 6 hours (depending on
ambient water temperature).
Water Bath
Tank
Tab
Clamp
Part Number STH12 9/10
Overflow
Tube
Drain Tube
41
5. Turn on the main water supply to the booster
assembly. Verify the booster is plugged in and
that the accumulator tank valve is open. (If the
system has an optional “Out-of-Syrup” device,
verify that it is unplugged.)
6. Verify the pump is running. Place the valve on the
right side of the pump box in the purge position
until all air bubbles have passed through the line.
Turn the valve back to “dispense”. Plug the
Out-of-Syrup device power cord into an
appropriate wall outlet at this time (if supplied).
NOTE: Verify that the pump box holding tank is full
before proceeding.
7. Turn on the circulator and carbonator. The
carbonator must run for approximately 1 to 3
minutes and shut off. The circulator must run
continuously. Verify that water is returning to the
water bath through the return bulk head fitting.
Important
Wait until a thin layer of ice has begun to form on
the evaporator before proceeding any further.
8. Go to the tower(s) and brix the valves. Using a
syrup separator and volume cup, adjust the flow
rate of the carbonated water to two fluid ounces
per second. Then, using the separator and a brix
cup, adjust the syrup flow rate for a ratio of
carbonated water to syrup to 5 to 1.
42
Part Number STH12 9/10
Component Identification
Typical System
Conduit
Conduit (In Wall)
Air
Compressor
CO2 Panel
Multiplex
Refrigeration
Unit
Water Booster
BIB Pumps
CO2
Tank
6 Valve
Soda
Tower
8 Valve
Soda
Tower
Part Number STH12 9/10
Water
Filters
BIB
Rack
Bag-In-Box
(BIB)
Syrup
43
Connections
MODEL 2803 CONNECTIONS
John Guest Fittings
Right Hand
Opening for
Conduit Supply
Lines
1/4" Plastic
CO2 Line from
Carbonator
Control Switches
Drain Hose
44
Part Number STH12 9/10
MODEL 11M CONNECTIONS
Opening for
Conduit Supply
Lines
Drain Hose
Part Number STH12 9/10
John Guest Fittings
Control Switches
45
MODEL 42, 44, & 50M CONNECTIONS
John Guest Fittings
Opening for
Conduit Supply
Lines
Drain Hose
ERC Controls
46
Control
Switches
(Non-ERC)
Part Number STH12 9/10
ERC CONTROL BOARD OUTPUT CONNENCTIONS
C
R
AGITATIOR
CARB A
CARB B
CIRC A
CIRC
B
L
L/N
EARTH
PLUG THIS PIN
Part Number STH12 9/10
47
48
HPCO SWITCH
COM
+5V DC
OUTPUT
HPCO
12
10
WATER
TS
9
8
TD
DISCHARGE TEMP
WATER BATH TEMP
COM
+5V DC
OUTPUT
SUCTION TEMP
CO2
11
TW
7
TB
6
TA
5
ICE
3
CA A
2
CA B
1
HIGH PROBE
LOW PROBE
GND
HIGH PROBE
LOW PROBE
GND
HIGH PROBE
LOW PROBE
GND
LEVEL PROBE
CIRC A TEMP
CIRC B TEMP
WL
4
ERC CONTROL BOARD INPUT CONNENCTIONS
Part Number STH12 9/10
Maintenance
Maintenance Schedule
This section provides a list of periodic maintenance
tasks and the scheduled frequency required to ensure
the proper operation of your Multiplex dispensing
equipment. To ensure quality beverages, prevent
downtime, and reduce costs, these tasks must be
performed as indicated.
PERIODIC MAINTENANCE FOR SOFT DRINK
EQUIPMENT (LISTED BY MAJOR COMPONENTS)
Dispensing stations
Daily (365 times per year)
• Take temperature of finished drinks. Pour off the
first and take the temperature of the second drink.
The proper temperature of drinks must be 38°F
(4°C) or less.
• Remove nozzles and diffusers from each
dispensing valve. Clean with soap and warm water
(not hot). Rinse with carbonated water and
reinstall.
• Flush all dispenser drains. Pour hot water down
drains at closing.
Beverage conduits
Every 4 months (3 times per year)
• Inspect beverage conduits for damage. Reinsulate and seal any uninsulated areas.
• Inspect floor chases and seal any open chase
ends.
Air compressor
Monthly (12 times per year)
• Drain condensate water from air compressor tank.
Every 4 months (3 times per year)
• Inspect air compressor filter and replace if
clogged. Air filter must be replaced every 6
months.
Part Number STH12 9/10
49
•
•
Inspect air compressor to verify cut-in at 70 psi
(4.8 bar) and cut-out at 90 psi (6.3 bar). Adjust
pressure switch if necessary.
Inspect system for air leaks and repair as required.
Refrigeration unit
Every 4 months (3 times per year)
• Clean the refrigeration unit air-cooled condenser
using a vacuum cleaner. If equipped with watercooled condenser, verify the water discharge
temperature is at 105°F (41°C). Adjust water
modulating valve if necessary.
• Inspect water bath to verify water level is at the top
of stand pipe. If below, add water and repair water
makeup device. If excessive amount of water is
flowing over stand pipe, locate leak within bath and
repair.
• Inspect ice bank within the water bath to verify
proper size ice bank and clarity. Look for uniform,
2" to 4" thick ice bank.
• Drain, clean, and refill water bath.
• Inspect agitator motor and ensure proper
operation.
• Inspect the circulating motor/pump assembly.
Clean strainer and oil motor.
• Inspect the carbonating motor/pump assembly.
Clean strainer and oil motor.
• Inspect entire system for leaks and repair as
required.
Water filters
Every 4 months (3 times per year)
• Verify that incoming water pressure is not less than
40 psi (2.8 bar) or greater than 60 psi (4.1 bar). If
equipped with a water regulator, verify proper
setting of 55 psi (3.8 bar). Adjust if necessary.
• If pressure is low, inspect water filter cartridges to
ensure they are able to supply adequate water
pressure under normal system flow. Replace if
unable to provide minimum 20 psi (1.4 bar) under
load.
50
Part Number STH12 9/10
Syrup supply
Daily (365 times per year)
• Clean general area of syrup hookup with soap and
warm water. Rinse off all soap.
Every 4 months (3 times per year)
• Inspect syrup lines for proper flavor identification
labels. Replace labels if necessary.
• Disconnect syrup containers. Clean connector with
soap and warm water. Rinse with plain water and
reconnect to syrup containers.
CO2 gas supply
Every 4 months (3 times per year)
• Inspect pressure setting at CO2 high pressure
regulator. Verify proper 90 psi (6.3 bar) pressure
setting. Adjust if necessary.
• Inspect pressure setting at syrup pressure
regulators. Verify propter pressure setting. Adjust if
necessary.
• Inspect system for CO2 leaks, repair as required.
PERIODIC MAINTENANCE FOR SOFT DRINK
EQUIPMENT (LISTED BY SCHEDULED
FREQUENCY)
Daily (365 times per year)
• Take temperature of finished drinks. Pour off the
first and take the temperature of the second drink.
The proper temperature of drinks must be 38°F
(4°C) or less.
• Remove nozzles and diffusers from each
dispensing valve. Clean with soap and warm water
(not hot). Rinse with carbonated water and
reinstall.
• Flush all dispenser drains. Pour hot water down
drains at closing.
• Clean general area of syrup hookup with soap and
warm water. Rinse off all soap.
Every 4 months (3 times per year)
• Using Brix cup and syrup separator, check for
proper carbonated water flows (standard flow: 5
oz. in 4 seconds, fast flow: 10 oz. in 4 seconds)
Part Number STH12 9/10
51
•
•
•
•
•
•
•
•
•
•
•
•
•
•
52
and syrup to water ratios at each dispensing
station. Adjust as required.
Inspect beverage conduits for damage. Reinsulate and seal any uninsulated areas.
Inspect floor chases and seal any open chase
ends.
Inspect air compressor filter and replace if
clogged. Air filter must be replaced every 6
months.
Inspect air compressor to verify cut-in at 70 psi
(4.8 bar) and cut-out at 90 psi (6.3 bar). Adjust
pressure switch if necessary.
Inspect system for air leaks and repair as required.
Clean the refrigeration unit air-cooled condenser
using a vacuum cleaner. If equipped with watercooled condenser, verify the water discharge
temperature is at 105°F (41°C). Adjust water
modulating valve if necessary.
Inspect water bath to verify water level is at the top
of stand pipe. If below, add water and repair water
makeup device. If excessive amount of water is
flowing over stand pipe, locate leak within bath and
repair.
Inspect ice bank within the water bath to verify
proper size ice bank and clarity. Look for uniform,
2" to 4" thick ice bank.
Drain, clean, and refill water bath.
Inspect agitator motor and ensure proper
operation.
Inspect the circulating motor/pump assembly.
Clean strainer and oil motor.
Inspect the carbonating motor/pump assembly.
Clean strainer and oil motor.
Inspect entire system for leaks and repair as
required.
Verify that incoming water pressure is not less than
40 psi (2.8 bar) or greater than 60 psi (4.1 bar). If
equipped with a water regulator, verify proper
setting of 55 psi (3.8 bar). Adjust if necessary.
Part Number STH12 9/10
•
•
•
•
•
•
If pressure is low, inspect water filter cartridges to
ensure they are able to supply adequate water
pressure under normal system flow. Replace if
unable to provide minimum 40 psi (1.4 bar) under
load.
Inspect syrup lines for proper flavor identification
labels. Replace labels if necessary.
Disconnect syrup containers. Clean connector with
soap and warm water. Rinse with plain water and
reconnect to syrup containers.
Inspect pressure setting at CO2 high pressure
regulator. Verify proper 90 psi (6.3 bar) pressure
setting. Adjust if necessary.
Inspect pressure setting at syrup pressure
regulators. Verify propter pressure setting. Adjust if
necessary.
Inspect system for CO2 leaks. Repair as required.
Part Number STH12 9/10
53
Cleaning and Sanitizing the Dispensing
Valves and Product Lines
MAINTENANCE SCHEDULE
Every day
Dispensing
valves
Remove nozzles and diffusers and
soak in mild detergent cleaning
solution. Scrub parts with small bristle
brush taking care to clean small
crevices and O-ring grooves. Turn
OFF power to dispensing valves.
Scrub exterior surfaces, including
bottom splash area and actuator
lever, with cleaning solution.
Reassemble diffusers and nozzles.
Wipe dry exterior surfaces before
turning ON power.
Drip pan and
drain hose
Wash with mild detergent. Rinse with
clean water.
Quick
disconnects
Wash with mild detergent. Rinse with
potable water.
Weekly
Outside,
dispenser
cabinet
Wash with clean water and mild
detergent. Wipe dry.
Every 3 months
Syrup
circuits
Sanitize each syrup circuit. See
“Cleaning and Sanitizing Procedure”.
Water bath
Drain, melt ice and clean using
detergent and brush; rinse with
potable water. Do not use water over
140°F (60°C).
Every 6 months
Condenser
Vacuum fins or use soft bristle brush
(scrub brush).
Air purifier
filter (if
equipped)
Replace.
54
Part Number STH12 9/10
CLEANING EQUIPMENT AND SUPPLIES
• Recommended cleaner: Any caustic-base (low
sudsing, non-perfumed, easily rinsed) detergent
solution which provides a minimum 2% sodium
hydroxide. The solution must be prepared in
accordance with the manufacturer’s instructions.
Solution temperature must be between 90°F
(32°C) and 110°F (43°C). Temperatures in excess
of this can cause internal damage to the
dispensing valve components.
• Recommended sanitizer: Any sanitizer which
provides a minimum of 120 parts per million
(120 milligrams per liter) of available chlorine.
Solution temperature must be between 90°F
(32°C) and 110°F (43°C). Temperatures in excess
of this can cause internal damage to the
dispensing valve components.
• Two five gallon (figals) syrup tanks and fittings,
cleaned and sanitized (one for cleaner; one for
sanitizer)
• Containers for cleaner and sanitizer solutions
• Clean, non-abrasive cloths
• Buckets
• Small Brush
• Extra Nozzles
• Extra Jumpers
Part Number STH12 9/10
55
CLEANING AND SANITIZING PROCEDURE
NOTE: Cleaning and sanitizing is not required for
potable water circuits. Potable water lines must remain
connected and operational during the cleaning and
sanitizing procedures for syrup circuits.
! Caution
It is required that the Carbonated Water Lines
remain connected and operational during
cleaning and sanitizing of the syrup circuits.
Sanitizing of the valve without the Carbonated
Water side operation may leave bacteria in the
nozzle, diffuser, and syrup tube.
Cleaning and dispensing valves
1. Disconnect each syrup container from its product
line. Remove product from the lines by purging
with clean warm tap water until syrup has been
fully purged from the product lines and valves.
2. Clean all lines and fittings with cleaning solution
and rinse with clean, room temperature water to
remove all traces of residual product.
Cleaning the product lines
1. To clean each valve product line, attach the valve
product lines to the pressure tank containing the
cleaning solution. Make sure each line is
completely filled. Pressurize the lines by pulsing
the valves.
Pressurizing the product lines
A. For 15 seconds turn dispensing valve ON,
OFF, and then immediately ON again for 15
cycles.
B. Allow the valve to remain flowing for 3
minutes.
C. Repeat pulsing and flowing the valves again
until all cleaning solution has been used.
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Part Number STH12 9/10
! Caution
Do not allow cleaning and sanitizing solutions to
remain in syrup systems longer than
recommended contact time. Exceeding contact
time will result in damage to valve components.
2. Flush the cleaning solution from the lines with
clean water after a minimum of 3 minutes, by
pulsing the valves as described above.
3. Remove the nozzles and the diffuser assemblies
from the valves. Clean with cleaning solution.
Agitate the assemblies to ensure assemblies are
clean. Place them in a container of sanitizing
solution for 15 minutes. Wearing sanitary gloves,
remove the nozzles and diffuser assemblies from
the sanitizing solution. Drain each until dry and
reassemble to the valves.
4. Attach each valve product line to the pressure
tank containing the sanitizing solution. Be sure all
connections are cleaned and sanitized before
connecting to each product line.
5. Pressurize and fill the lines with sanitizing
solution. Make sure lines are completely filled,
Allow the sanitizing solution to flow through each
valve while activating the valves for 15 cycles.
A. Leave valves OFF and allow to stand
pressurized for 30 minutes.
B. Activate the valves for two (2) cycles. Flush
remaining sanitizer continuously through the
valves.
6. Reconnect the syrup containers to their
respective circuits. Prepare the unit for operation.
7. Draw drinks to refill lines and flush the sanitizing
solution from the dispenser. Taste the beverage to
verify that there is no off-taste (chlorine).
Part Number STH12 9/10
57
Sanitizing
BEVERAGE SYSTEM CLEANING
! Warning
Flush sanitizing solution from syrup system.
Residual sanitizing solution left in system could
create a health hazard.
! Warning
When using cleaning fluids or chemicals, rubber
gloves and eye protection must be worn.
Sanitize the beverage system at initial start-up as well
as regularly scheduled cleaning. The drain pan must
be in place under soda valves, to carry away detergent
and sanitizing agents that will be flushed through
valves.
BAG-IN-BOX SYSTEM SANITATION
The procedure below is for the sanitation of one
syrup circuit at a time. Repeat to sanitize
additional circuits.
You will need the following items to clean and sanitize
the Bag-in-Box (BIB) beverage system:
•
Three (3) clean buckets
•
Plastic brush or soft cloth
•
Mild detergent
•
Unscented bleach (5% Na CL O) or
Commercial sanitizer
•
Bag-In-Box bag connector
1. Prepare the following in the buckets:
58
•
Bucket 1 — warm to hot tap water for rinsing.
•
Bucket 2 — mild detergent and warm to hot
water.
Part Number STH12 9/10
•
Bucket 3 — mix a solution of unscented
bleach (5% Na CL O) or commercial sanitizer
and warm to hot water. Mixture should supply
100 PPM available chlorine (1/4 oz. bleach to
1 gallon water).
2. Disconnect the “syrup-line side” of the BIB
connector.
Bag
side
connector
3. Rinse connector with warm tap water.
Part Number STH12 9/10
59
4. Connect syrup connector to BIB connector and
immerse both into Bucket 1. A “bag-side”
connector can be created by cutting the connector
from an empty disposable syrup bag.
5. Draw rinse water through system until clean water
is dispensed. Most beverage valves allow the
syrup side to be manually activated by depressing
the syrup pallet.
6. Connect Bucket 2 to system.
7. Draw detergent solution through system until
solution is dispensed.
8. Repeat steps 2-7 until all syrup circuits contain
detergent solution.
9. Allow detergent solution to remain in the system
for 5 minutes.
10. Connect Bucket 3 to system.
11. Draw sanitizing solution through system until
solution is dispensed.
12. Repeat step 11 until all syrup circuits contain
sanitizer solution.
13. Allow sanitizer solution to remain in system for 15
minutes.
14. Remove nozzles and diffusers from beverage
valves.
15. Scrub nozzles, diffusers and all removable valve
parts (except electrical parts) with a plastic brush
or a soft cloth and the detergent solution.
16. Soak nozzles, diffusers and removable valve
parts (except electrical parts) in sanitizer for 15
minutes.
17. Replace nozzles, diffusers and valve parts.
18. Connect Bucket 1 to system.
19. Draw rinse water through system until no
presence of sanitizer is detected.
20. Attach syrup connectors to BIBs.
21. Draw syrup through system until only syrup is
dispensed.
22. Discard first 2 drinks.
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Part Number STH12 9/10
FIGAL BEVERAGE SYSTEM
1. Prepare the following in three clean Figal tanks:
•
Rinse tank - fill with room temperature tap
water.
•
Detergent tank - mix approved beverage
system cleaner with warm water as directed.
•
Sanitizing tank - mix a solution of unscented
bleach (5% Na CL O) or commercial sanitizer
and warm to hot water. Mixture should supply
100 PPM available chlorine (1/4 oz. bleach to
1 gallon water).
2. Disconnect all product and water lines from
product tanks and remove carbonator.
3. Locate the Figal syrup tank for the circuit to be
sanitized. Remove both quick disconnects from
the Figal syrup tank. Rinse quick disconnects in
tap water.
4. Connect rinse tank to the syrup line. Draw clean
rinse water through the valve until syrup is flushed
from the system.
5. Connect detergent tank to the syrup line and draw
detergent through the valve for two minutes.
Then, allow remaining detergent to stay in the
system for five minutes.
6. Connect rinse tank to the syrup line. Draw clean
rinse water through the valve until detergent is
flushed from the system.
7. Remove valve nozzle and diffuser as shown in
Daily Cleaning instructions. Using a plastic brush
or a soft cloth and warm water, scrub the nozzle,
diffuser, bottom of the dispensing valve and cup
lever, if applicable.
8. Place removable valve parts (EXCEPT solenoids)
in sanitizing solution for 15 minutes.
9. Replace valve diffuser and nozzle on the
beverage valve.
10. Connect sanitizer tank to the syrup line and draw
sanitizer through the valve for two minutes. Allow
sanitizer to remain in the system for a minimum of
15 minutes.
Part Number STH12 9/10
61
11. Reconnect syrup and carbonated water lines.
12. Draw syrup through the lines to rinse the system.
Discard drinks until at least two cups of
satisfactory tasting beverage are dispensed
through the valve.
Shipping, Storage and Relocation
! Caution
Before shipping, storing, or relocating this unit,
syrup systems must be sanitized. After sanitizing,
all liquids (sanitizing solution and water) must be
purged from the unit. A freezing environment
causes residual sanitizing solution or water
remaining inside the unit to freeze, resulting in
damage to internal components.
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Part Number STH12 9/10
Operation
How the Multiplex Works
Model 2803 — a 1/3 HP refrigeration unit that will provide
pre-mix carbonated beverages and chilled carbonated water
for up to 6 gal (3 L) of syrup/day or 280 drinks/day (2,000 gal/yr)
with a 40 ft (12 m) maximum conduit length. This is a remote
refrigeration unit that derives its peak draw capacity from the
reserve ice bank produced from a capillary tube refrigeration
system. This system is controlled to cycle ON and OFF by the
operation of the ice bank control. The sensing bulb that controls
the ice bank is located on an adjustable bracket in the water
bath.
Model 11M — a 1/2 HP refrigeration unit that will provide
premix carbonated beverages and chilled carbonated water for
up to 12 gal (45 L) of syrup/day or 560 drinks/day (4,000
gal/year) with a 100 ft (30 m) maximum conduit length. This is
a remote refrigeration unit that derives its peak draw capacity
from the reserve ice bank produced from a capillary tube
refrigeration system. This system is controlled to cycle ON and
OFF by the operation of the ice bank control. The sensing bulb
that controls the ice bank is located on an adjustable bracket in
the water bath.
Model 42M — a 1 HP refrigeration unit that will provide pre-mix
carbonated beverages and chilled carbonated water for up to
50 gal (190 L) of syrup/day or 3,060 drinks/day (18,200 gal/yr)
with a 250 ft (80 m) maximum conduit length. This refrigeration
unit is a remote refrigeration unit that derives its peak capacity
from the reserve ice bank produced from a TXV system. This
system is controlled to cycle ON and OFF by the operation of
the ice control. The sensing probe that controls the ice bank, is
located on an adjustable bracket in the water bath.
Model 44M — a 1 HP refrigeration unit that will provide pre-mix
carbonated beverages and chilled carbonated water for up to
50 gal (190 L) of syrup/day or 3,060 drinks/day (18,200 gal/yr)
with a 250 ft (80 m) maximum conduit length. This refrigeration
unit is a remote refrigeration unit that derives its peak capacity
from the reserve ice bank produced from a TXV system. This
system is controlled to cycle ON and OFF by the operation of
the ice control. The sensing probe that controls the ice bank, is
located on an adjustable bracket in the water bath.
Part Number STH12 9/10
63
Model 50M — a 2.2 HP Pre-mix refrigeration unit that will
provide pre-mix carbonated beverages and chilled carbonated
water for up to 42 gal (159 L) of syrup/day or 2,000 drinks/day
(15,000 gal/yr) with a 350 ft (107 m) maximum conduit length.
This refrigeration unit is a remote refrigeration unit that derives
its peak capacity from the reserve ice bank produced by the
operation of the compressor. This system is controlled to cycle
ON and OFF by the operation of the ice bank control. The
sensing bulb that controls the ice bank is located on an
adjustable bracket in the water bath.
Differences Between the TS & SS Units
Multiplex soda and water chillers may have three
different series numbers. Starting in 2007 some no
longer begin with an “SS”; they now begin with a “TS”.
Starting in 2008, units with ERC (Electronic
Refrigeration Controls) end with an “E”. The following
shows you how to tell the difference between the TS
version and the SS.
• The TS uses common components from Manitowoc Ice makers
to assist in product and parts availability.
64
Part Number STH12 9/10
• The TS compressor is mounted with bolts instead of studs.
• TS remote and water-cooled back panel connections
are offset to protect fittings.
Part Number STH12 9/10
65
• TS air-cooled condenser comes standard with a filter.
WATER MANIFOLD TS
Two Stainless Steel log style
manifolds
• One regulated supply for
carbonator pumps.
• One unregulated supply for
non-carb drinks and water
bath fill.
Other Connections
• Connections are made in the
water bath compartment.
• Separate plain water manifold
eliminates need to plug off
during installation.
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Part Number STH12 9/10
ELECTRICAL TS
• Electrical compartment has been moved up on the unit to eliminate
water intrusion potential from the pump compartment.
• All components are now 208/230V. This eliminates the need for a
neutral wire.
• New unit has service connections in the electrical compartment.
Allows more room to work and more reliable connection.
• Pump protection switch has been moved to the pump
compartment to eliminate potential leak point in electrical
compartment.
Part Number STH12 9/10
67
WATER BATH ACCESS SS
• Has a round hole in the front and back panels with
no edge trim to protect lines.
• End panel has two ovals in the rear of the panel with
edge trim to help protect conduit lines.
WATER BATH ACCESS TS
• All panels have large oval access holes with interchangeable
covers.
• Front panel has 3 hole cover for water and CO2 line routing.
• Back panel has solid cover.
• End panel has one open cover and one solid cover.
• Open cover provides wide ledge for conduit line protection.
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Part Number STH12 9/10
SERVICE ACCESS SS
• Front panel was solid and did not allow easy access for service.
• Switch panel was mounted flush to end panel.
SERVICE ACCESS TS
• Front panel is split to allow front access to the compressor
compartment.
• Switches are recessed and the edge has trim panel to protect
fingers from sheet metal edges.
Part Number STH12 9/10
69
SERVICE ACCESS TS WITH ERC
LED Display
PGM
SER
CIRC
B
COMP/
AGIT
Service Switch
CARB A
CARB B
CIRC A
CIRC B
Program
Switch
• Service Switch — (SER) switch, press to send ID on power line
network.
• Wink Function — LED flashes “Ion” to indicate wink function. Press
program switch (PGM) to disable wink function.
70
Part Number STH12 9/10
Equipment Setup Procedure (Non-ERC)
1. Ensure that all valve nozzles are attached to the
valves.
2. Observe pressure of CO2 high pressure tank of
500 psi (34 bar) or more, or bulk CO2 tank of
150 psi or more. Primary regulator set at 90 psi
(6 bar) and the secondary regulator set at 35 psi
(2.4 bar).
3. Observe the control panel to verify that all
pressure gauges are set at correct operating
pressures.
4. Check the syrup tanks to make sure a sufficient
number of tanks are connected in series to satisfy
business volume.
5. Clean syrup inlet and outlet quick disconnects at
the same time tanks are replaced. Rinse
disconnects in clean potable water.
Part Number STH12 9/10
71
Start-up (Non-ERC)
1. Fill the refrigeration unit water bath tank with
water to within 1/2" (1.27 cm) of the top of the
overflow tube.
2. Open the manual water shut-off valve to the water
cooled condenser (if applicable).
3. Turn ON the rocker switch labeled “Refrigeration”
to begin building an ice bank.
4. Turn ON the rocker switch labeled “Agitator”.
NOTE: On TS units 3 & 4 are combined into 1 switch.
5. Ice will begin to form on the evaporator coils in
approximately 2 hours.
6. The refrigeration unit will build an ice bank in
approximately 4 to 6 hours.
7. If optional CO2/Water Control Panel has been
installed on the refrigeration unit, refer to the
installation instructions for operation and testing
the circuits for leaks.
8. The carbonation circuits “A” and “B,” as well as
the syrup circuits must be checked for leaks and
possible cross circuits before turning ON the
water supply to carbonator pumps.
9. Turn on main water supply. Set incoming
regulator to 55 psi on the CO2 panel; 25 psi for the
Model 11M root beer system’s internal regulator
(must be lower than CO2 supply pressure). Once
water is supplied to the unit, air needs to be
purged from the carbonator tank. Do so by lifting
press relief valve tab until water comes out of
relief valve.
10. Turn on main CO2 supply. Set regulator initially to
90 – 100 psi. For the Model 11 Root Beer system,
set regulator initially to 26 psi; it can be raised
incrementally to 30 psi if there is excessive
foaming.
11. Set bag-in-box syrup tank push pressure CO2
regulator to 65 – 70 psi. For the Model 11 Root
Beer system, set push pressure CO2 regulator to
35 – 40 psi.
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Part Number STH12 9/10
PLACING THE CARBONATION SYSTEM IN
OPERATION
1. Open the CO2 gas supply valve at CO2 tanks or
bulk tank. Adjust the CO2 pressure to 90 psi
(6.2 bar).
2. Open relief valve on top of the carbonator tank for
4 seconds to bleed off air in tank.
3. Turn ON the water supply to unit.
4. Turn ON the switch labeled “Carbonator Pump”.
Allow carbonator to run and cycle OFF.
5. Activate all valves until a smooth, continuous flow
of carbonated water and non-carbonated water
appear at the valves.
6. Turn ON switch labeled “Circulator”.
7. Allow at least 1 hour before proceeding to
calibration instructions. You may complete the
sanitizing instructions during this period.
Part Number STH12 9/10
73
Sequence of Operation (Non-ERC)
PRE-MIX REFRIGERATION UNIT
Ice Bank Is Required
1. Check water bath for full ice bank.
2. The stabilized water bath operating temperature
must be maintained at 33°F (0.6°C) to 35°F
(1.7°C).
The following is a sequence of operations for the
Multiplex Pre-mix Beverage equipment.
1. Once a drink is dispensed, the following will
occur:
A. For a Syrup Tank System, the Pre-mix syrup
is manually mixed at the store. Pre-mix
beverage is then transferred to a holding tank
for supply to the Multiplex system.
B. For a Bag-In-Box System, pre-mix syrup is
drawn from a Bag-In-Box by means of a gas
driven syrup pump.
2. The carbonator pump (stainless) pulls the 5:1
pre-mix out of the 3 gallon holding tank and injects
it into the pre-mix carbonator tank where the CO2
pressure is 35 psi (2.4 bar) on the tank.
3. The circulator pump runs continuously and
circulates water bath water through the conduit to
provide cooling for all drinks.
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Part Number STH12 9/10
Conduit
Conduit (In Wall)
Air
Compressor
CO2 Panel
Multiplex
Refrigeration
Unit
Water Booster
BIB Pumps
CO2
Tank
6 Valve
Soda
Tower
8 Valve
Soda
Tower
Water
Filters
BIB
Rack
Bag-In-Box
(BIB)
Syrup
Multiplex Pre-mix Beverage System Operation
and Layout
Part Number STH12 9/10
75
Start-up (with ERC)
PLACING EQUIPMENT IN OPERATION
Before placing equipment in operation, verify that all
requirements for roof mounted Remote Condenser
Units (if applicable) have been satisfied. Refer to the
instructions on installing the Remote Condenser.
Verify proper supply power to unit.
1. Fill the refrigeration unit water bath tank with
water to within 1/2" (1.27 cm) of the top of the
overflow tube.
2. Open the manual water shut-off valve to the water
cooled condenser (if applicable). Refer to
“Electronic Control” for control programming
sequence.
3. Press “Comp/Agit” to begin building an ice bank.
4. Ice will begin to form on the evaporator coils in
approximately 2 hours.
5. The refrigeration unit will build an ice bank in
approximately 4 to 6 hours.
6. If optional CO2/Water Control Panel has been
installed on the refrigeration unit, refer to the
installation instructions for operation and testing
the circuits for leaks.
7. The carbonation circuits “A” and “B,” as well as
the syrup circuits must be checked for leaks and
possible cross circuits before turning ON the
water supply to carbonator pumps.
8. Turn on main water supply. Set incoming
regulator to 55 psi on the CO2/Water control
panel. Once water is supplied to the unit, air
needs to be purged from the carbonator tank. Do
so by lifting press relief valve tab until water
comes out of relief valve.
9. Set bag-in-box syrup tank push pressure CO2
regulator to 60 psi.
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Part Number STH12 9/10
PLACING THE SYRUP SYSTEM IN OPERATION
1. Open the CO2 gas supply valve at CO2 tanks or
bulk tank. Adjust the CO2 pressure to 90 psi
(6.2 bar).
2. Open relief valve on top of the carbonator tank for
4 seconds to bleed off air in tank.
3. Verify the water supply to unit is on.
4. Press the switch labeled “Carb A” (and B if
applicable). Allow carbonator to run and cycle
OFF.
5. Press the switch labeled “CIRC A” (and “CIRC B”
if applicable).
6. Activate all vales until a smooth, continuous flow
or carbonated water and non-carbonated water
appear at the valves.
7. Allow at least 1 hour before proceeding to
calibration instructions. You may complete the
sanitizing instructions during this period.
Part Number STH12 9/10
77
Sequence of Operation (with ERC)
ELECTRONIC CONTROL
Prerequisites
• Potable water must be connected to the
carbonator pump circuit.
• The ice bank water bath water must cover the
evaporator. The compressor will not start unless
the ice bank control probes are immersed in water.
• CO2 must be supplied.
Initial Power-up
The control has a 30-second delay when power is
connected, or disconnected and reconnected. The
display will show Pd30 - power delay and 30 seconds
left in the countdown cycle.
Normal Two Circuit Operation
Pressing the COMP/AGIT button will start the water
bath agitator immediately and initiate the 180 second
compressor delay. The display will show Cd99
(compressor delay & 99 seconds) and will start to
count down from 99 seconds after the first 81 seconds
have elapsed. After 180 seconds the compressor and
condenser fan motor energize and the COMP/AGIT
LED flashes. Pressing the CARB A and CARB B
buttons will power the carbonator tank liquid level
control. The corresponding LED flashes to indicate the
pump is running. Pressing the CIRC A & CIRC B
buttons will immediately energize the circulating
pumps and energize the LED constantly. The display
will show the circulating temperature and show the A
circuit. When two circuits are used the readout will
alternate between A and B circuits every 5 seconds.
The compressor and condenser fan will continue to
run until ice contacts the ice bank control probe closest
to the evaporator. When ice contacts the probe, the
COMP/AGIT LED lights constantly and the
compressor and condenser fan motor de-energize.
As the ice bank melts, the ice bank control probe will
lose contact with the ice; the LED will flash and the
compressor and condenser fan motor will restart. This
cycle will repeat as required depending on load.
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Part Number STH12 9/10
Power Interruption
During a power interruption the control will resume
from the point of interruption when power is reapplied
and the time delay expires. Any switches/components
that were energized when power was interrupted will
be energized when power is reapplied.
Error Codes
E1 = Low Water Supply Pressure
E2 = Low CO2 Pressure
E3 = Low Water Level - Water Bath
E4 = High Water Bath Temperature
E5 = High Water Supply Pressure
E6 = High Refrigeration Temperature
E7 = High Ice Bank Size (Probe Sensor 2)
E8 = Long Carb A Run Time
E9 = Long Carb B Run Time
NOTE: Shorted Transducer = "----"
Open Transducer = "===="
Error codes will display until corrected.
CIRC
A
PGM
SER
CIRC
B
COMP/
AGIT
CARB
A
CARB
B
CIRC
A
CIRC
B
Control Programming
SER Switch
• For when optional LON communication network is
connected.
Part Number STH12 9/10
79
PGM Switch
• Used to enter and exit programming modes.
• Press PGM Switch F000 will display
•
•
Press and hold Carb A switch — Display will
indicate Water Bath Temperature
•
Press and hold Circ A switch — Display will
indicate Discharge Temperature
•
Press and hold Circ B switch — Display will
indicate Suction Temperature
Press PGM Switch P000 will display
•
Press and hold Carb A switch — Display will
indicate Water Pressure
•
Press and hold Carb B switch — Display will
indicate CO2 Pressure
Press and hold PGM switch for 3 seconds to save
settings and exit program mode.
Program Mode 1
To enter, press and hold switch for 3 seconds.
• 0001 will display indicating Mode 1
• Wait 3 seconds — C000 will display
• Press and hold Carb A switch — Display will
indicate one of the following:
80
•
CA00 — Low and High Probes are open
(carbonator motor is energized)
•
CA11 — Low and High Probes are closed
(carbonator motor is de-energized)
•
CA01 — Low Probe closed (Motor will still be
on)
Part Number STH12 9/10
•
•
Press and hold Carb B switch — Display will
indicate one of the following:
•
Cb00 — Low and High Probes are open
(carbonator motor is energized)
•
Cb11 — Low and High Probes are closed
(carbonator motor is de-energized)
•
Cb01 — Low Probe closed (Motor will still be
on)
Press and hold COMP/AGIT switch — Display will
indicate one of the following:
•
CL 0 — Water level low
•
CL 1 — Water level OK
Program Mode 2
Add circulation pumps C & D.
• Press PGM button for 3 seconds — Display shows
0001.
• Press PGM button — Display shows 0002
program mode 2.
• Wait 3 seconds — Display shows -002 = Factory
default setting.
•
Pressing CIRC A button
energizes/de-energizes pump A
•
Pressing CIRC B button
energizes/de-energizes pump B
•
Program CIRC C — Press CARB A button –
Display shows -102 = Carb A button
energizes/de-energizes pump C
• Program CIRC D — Press CARB B button Display shows -012 = Carb B button
energizes/de-energizes pump D
Press and hold PGM switch for 3 seconds to save
settings and exit program mode.
Part Number STH12 9/10
81
Program Mode 4
Temporarily cancel display of error codes. Cancelling
the error codes allows circulating glycol temperatures
to be displayed until the error can be corrected.
• Press PGM button for 3 seconds — Display shows
0001.
• Press PGM button three times — Display shows
0004 program mode 4.
• Wait 3 seconds — Display shows -004 = All error
codes will be displayed during run mode.
• Press COMP/AGIT button once — Display shows
---4 = error codes will not be displayed during run
mode.
NOTE: Disconnecting and reconnecting main power
will reset the control board to the factory setting -004 =
Error codes will be displayed in the run mode.
Equipment Setup Procedure (with ERC)
1. Ensure that all valve nozzles are attached to the
valves.
2. Observe pressure of CO2 high pressure tank of
500 psi (34 bar) or more, or bulk CO2 tank of
150 psi or more. Primary regulator set at 90 psi
(6 bar) and the secondary regulator set at 35 psi
(2.4 bar).
3. Observe the control panel to verify that all
pressure gauges are set at correct operating
pressures.
4. Check the syrup tanks or BIB to make sure a
sufficient number of tanks are connected in series
to satisfy business volume.
5. Clean syrup inlet and outlet quick disconnects at
the same time tanks are replaced. Rinse
disconnects in clean potable water.
82
Part Number STH12 9/10
Part Number STH12 9/10
COMPRESSOR
DELAY SHOWS
“Cd99” AND
COUNTS DOWN
TO “Cd00”
POWER UP DELAY
SHOWS “Pd30”
AND COUNTS
DOWN TO “Pd00”
COMPRESSOR
COMES ON AFTER
DELAY, IF
CONTROL CIRCUIT
REQUIRES
YES
COMP/AGIT
SWITCH ON
NORMAL RUN
MODE DISPLAY
SHOWS CIRC
WATER TEMP(S)
OR WATER BATH
TEMP IN BEER
E1 = LOW WATER PRESS
E2 = LOW CO2 PRESS
E3 = LOW WATER BATH LEVEL
E4 = HIGH WATER BATH TEMP
E5 = HIGH WATER PRESS
E6 = HIGH REFRIGERATION TEMP
E7 = LARGE ICE BANK
E8 = LONG CARB A RUN TIME
E9 = LONG CARB B RUN TIME
“===” =OPEN
“___” =SHORT
NO
ERROR CODE
DISPLAYS TILL
CORRECTED
MULTIPLE
ERRORS CYCLE
PGM MODE 4
OVERRIDES
YES
ERROR
CODE(S)
ENTER PROGRAM MODE
EXIT PROGRAM MODE
NO
RESPECTIVE
LED COMES ON
CONSTANT,
FLASHES IF
LOAD CONTROL
CIRCUIT ON
PRESS ANY
SWITCH TO
TURN ON LOAD
OR LOAD
CONTROL
CIRCUIT
PROGRAM MODE 1
PROGRAM MODE 2
PROGRAM MODE 3
PROGRAM MODE 4
PROGRAM MODE
TO ENTER, PRESS AND HOLD PGM SWITCH FOR MINIMUM OF 3 SECONDS. DISPLAY SHOWS “0001”
TO EXIT, PRESS AND HOLD PGM SWITCH FOR MINIMUM OF 3 SECONDS. DISPLAY SHOWS NORMAL RUN MODE
AGITATOR
COMES ON
CONSTANTLY
SUPPLY POWER ON
Multiplex Electronic Refrigeration Control (ERC)
Programming
83
Equipment Close Procedure — All Units
1. Clean the underside of the dispensing tower
around the nozzle area with a clean damp towel.
2. Pour at least 60 oz (1.8 liters) of warm water down
the drain openings.
84
Part Number STH12 9/10
PRESS PGM SWITCH ONCE
PRESS CIRC A SWITCH
TO SHOW WATER LEVEL
PROBE “CL 1” = WATER
“CL 0” = LOW WATER (E3)
PRESS CARB A SWITCH
TO SHOW LLC PROBE
“CA00” = NO WATER
CARB A MOTOR ON
“CA01” = LOW SENSOR
IN WATER, MOTOR ON
“CA11” = LOW & HIGH
SENSOR IN WATER,
MOTOR OFF
REPEAT ABOVE FOR
CARB B SWITCH “CbXX”
PRESS COMP/AGIT
SWITCH TO SHOW ICE
BANK PROBE
“CC11” = NO ICE
COMPRESSOR ON; “CC10”
= ICE ON LOW SENSOR
COMPRESSOR OFF
“CC00” = ICE BANK TOO
LARGE (E7)
“C000” (CONDUCTIVITY)
WAIT 3 SECONDS
DISPLAY SHOWS “C000”
PROGRAM MODE 1
READ CONDUCTIVITY,
TEMPERATURE,
PRESSURE CHANGE
UNITS
PRESS CARB A SWITCH
TO SHOW WATER SUPPLY
PRESSURE
PRESS CARB B SWITCH
TO SHOW CO2 PRESSURE
“P000” (PRESSURE)
PRESS PGM SWITCH ONCE
PRESS CARB A SWITCH
TO SHOW WATER BATH
TEMP
PRESS CIRC A SWITCH TO
SHOW DISCHARGE TEMP
PRESS CIRC B SWITCH TO
SHOW SUCTION TEMP
“F0000” (TEMPERATURE)
PRESS CARB A SWITCH TO
CONVERT CARB A MOTOR
TO CIRC MOTOR
“-102”
PRESS CARB B SWITCH TO
CONVERT CARB B MOTOR
TO CIRC MOTOR
“-112”
PRESS PGM SWITCH ONCE IN
LESS THAN 3 SECONDS
DISPLAY “0002”, WAIT THREE
SECONDS DISPLAY “-002”
PROGRAM MODE 2
PROGRAM ONE OR TWO MORE
CIRCULATING PUMPS
NOTE:
SET POINT =
COMPRESSOR OFF
DIFFERENTIAL IS FIXED
AT 2°F ABOVE SET POINT
COMPRESSOR ON
PRESS CIRC B SWITCH
TO RAISE SET POINT
TEMPERATURE
PRESS CIRC A SWITCH
TO LOWER SET POINT
TEMPERATURE
PRESS COMP/AGIT SWITCH
ONCE, DISPLAY = “1XX3” WHERE
XX=SET POINT TEMPERATURE
(DEFAULT = “1273”)
(DIFFERENTIAL FIXED AT 2°
ABOVE SET POINT)
PRESS PGM SWITCH TWICE
IN LESS THAN 3 SECONDS,
DISPLAY “0003”, WAIT
THREE SECONDS DISPLAY
“-003”
PROGRAM MODE 3
PROGRAM TEMPERATURE
CONTROL OF WATER BATH
(BEER)
WHEN “P000” PRESS
COMP/AGIT SWITCH
ONCE TO CHANGE
PRESSURE UNITS TO
BAR “Fb00”
WHEN “F000” PRESS
COMP/AGIT SWITCH
ONCE TO CHANGE
TEMPERATURE UNITS
TO CENTIGRADE
“FC00”
TO CHANGE UNITS
PRESS COMP/AGIT
SWITCH, DISPLAY
SHOWS “---4”
INDICATING ERROR
CODES WILL BE
DISABLED UNTIL NEXT
POWER ON/OFF
SEQUENCE
PRESS PGM SWITCH
THREE TIMES IN LESS
THAN THREE SECONDS
DISPLAY “0004”, WAIT
THREE SECONDS
DISPLAY “-004”
PROGRAM MODE 4
TEMPORARILY DISABLE
ERRORS
Part Number STH12 9/10
COMPRESSOR
DELAY SHOWS
“Cd99” AND
COUNTS DOWN
TO “Cd00”
COMPRESSOR
COMES ON AFTER
DELAY, IF
CONTROL CIRCUIT
REQUIRES
YES
NO
YES
NO
EXIT PROGRAM MODE
ENTER PROGRAM MODE
E1 = Low Water Suply Pressure
E2 = Low Co2 Pressure
E3 = Low Water Level - Water Bath
E4 = High Water Bath Temperature
E5 = High Water Supply Pressure
E6 = High Refrigeration Temperature
E7 = High Ice Bank Size (Probe Sensor 2)
E8 = Long Carb A Run Time
E9 = Long Carb B Run Time
Shorted Transducer = "----"
Open Transducer = "===="
ERROR
CODE(S)
ERROR CODE
DISPLAYS TILL
CORRECTED
MULTIPLE
ERRORS CYCLE
PGM MODE 4
OVERRIDES
COMP/AGIT
SWITCH ON
NORMAL RUN
MODE
DISPLAY SHOWS
CIRC WATER
TEMP(S) OR
WATER BATH
TEMP IN BEER
MODE
RESPECTIVE
LED COMES ON
CONSTANT,
FLASHES IF
LOAD CONTROL
CIRCUIT ON
PRESS ANY
SWITCH TO
TURN ON LOAD
OR LOAD
CONTROL
CIRCUIT
WAIT 3 SECONDS
DISPLAY SHOWS “C000”
PROGRAM MODE 1
READ CONDUCTIVITY,
TEMPERATURE,
PRESSURE
CHANGE UNITS
PRESS PGM SWITCH ONCE (1)
IN LESS THAN 3 SECONDS
DISPLAY “0002”, WAIT THREE
(3) SECONDS DISPLAY “-002”
PROGRAM MODE 2
PROGRAM ONE (1) OR TWO (2)
MORE CIRCULATING PUMPS
PRESS PGM SWITCH TWICE
(2) IN LESS THAN 3
SECONDS, DISPLAY “0003”,
WAIT THREE (3) SECONDS
DISPLAY “-003”
PROGRAM MODE 3
PROGRAM TEMPERATURE
CONTROL OF WATER BATH
(BEER)
PRESS PGM SWITCH
THREE TIMES (3) IN
LESS THAN 3 SECONDS
DISPLAY “0004”, WAIT
THREE (3) SECONDS
DISPLAY “-004”
PROGRAM MODE 4
TEMPORARILY DISABLE
ERRORS
PROGRAMMODE
TO ENTER, PRESS AND HOLD PGM SWITCH FOR MINIMUM OF 3 SECONDS, DISPLAY SHOWS “0001”
TO CHANGE TO NEXT PROGRAM MODE, PRESS PGM BUTTON SEQUENTIALLY IN LESS THAN 3 SECONDS FROM ENTER (“0002”, ETC)
TO EXIT, PRESS AND HOLD PGM SWITCH FOR MINIMUM OF 3 SECONDS, DISPLAY SHOWS NORMAL RUN MODE
AGITATOR
COMES ON
CONSTANTLY
SUPPLY POWER ON
POWER UP DELAY
SHOWS “Pd30”
AND COUNTS
DOWN TO “Pd00"
MULTIPLEX ELECTRONIC REFRIGERATION
CONTROL (ERC) PROGRAMMING
85
86
Part Number STH12 9/10
PRESS PGM SWITCH
ONCE (1)
PRES CIRC A SWITCH
TO SHOW WATER
LEVEL PROBE
“CL_1” = WATER
“CL_0” = LOW WATER
(E3)
PRESS CARB A SWITCH
TO SHOW LLC PROBE
“CA00” = NO WATER
CARB A MOTOR ON
“CA01”= LOW SENSOR
IN WATER, MOTOR ON
“CA11” = LOW & HIGH
SENSOR IN WATER,
MOTOR OFF
REPEAT ABOVE FOR
CARB B SWITCH “CbXX”
PRESS COMP/AGIT
SWITCH TO SHOW ICE
BANK PROBE
“CC11” = NO ICE
COMPRESSOR ON
“CC10”= ICE ON LOW
SENSOR COMPRESSOR
OFF
“CC00” = ICE BANK TOO
LARGE (E7)
“C000”(CONDUCTIVITY)
PRESS CARB A SWITCH
TO SHOW WATER
SUPPLY PRESSURE
PRESS CARB B
SWITCH TO SHOW CO2
PRESSURE
“P000” (PRESSURE)
PRESS PGM SWITCH
ONCE (1)
PRESS CIRC A SWITCH
TO SHOW
LIQUID LINE TEMP
PRESS CIRC B SWITCH
TO SHOW
SUCTION TEMP
“F000” (TEMPERATURE)
PRESS CARB A SWITCH
TO SHOW WATER BATH
TEMP
PRESS CARB A SWITCH TO
CONVERT CARB A MOTOR
TO CIRC MOTOR
“-102”
PRESS CARB B SWITCH TO
CONVERT CARB B MOTOR
TO CIRC MOTOR
“-112”
NOTE:
SET POINT =
COMPRESSOR OFF
DIFFERENTIAL IS FIXED
AT 2°F ABOVE SET POINT
COMPRESSOR ON
PRESS CIRC B SWITCH
TO RAISE SET POINT
TEMPERATURE
PRESS CIRC A SWITCH
TO LOWER SET POINT
TEMPERATURE
PRESS COMP/AGIT
SWITCH ONCE, DISPLAY
=”1XX3" WHERE XX= SET
POINT TEMPERATURE
(DEFAULT = “1273”)
(DIFFERENTIAL FIXED AT
2° ABOVE SET POINT)
WHEN “P000” PRESS
COMP/AGIT SWITCH
ONCE (1) TO CHANGE
PRESSURE UNITS TO
BAR
“Fb00”
WHEN “F000” PRESS
COMP/AGIT SWITCH
ONCE (1) TO CHANGE
TEMPERATURE UNITS
TO CENTIGRADE
“FC00”
TO CHANGE UNITS
PRESS COMP/AGIT
SWITCH, DISPLAY
SHOWS “---4”
INDICATING ERROR
CODES WILL BE
DISABLED UNTIL
NEXT POWER OFF/ON
SEQUENCE
Troubleshooting
Electronic Refrigeration Control (ERC)
Model Error Codes
•
•
•
•
Error codes will interrupt the temperature display
and stay active until the error is corrected.
If multiple errors are present, the errors will rotate
and display every 5 seconds.
Resetting errors — After correcting the problem,
the respective switch for the error must be cycled
OFF and then ON to reset.
Disconnecting and reconnecting power will erase
all errors.
Error
Code
Error
E1
Low Water Supply Pressure
Lower than 5 psi for 5 Seconds
E2
Low CO2 Pressure
Lower than 10 psi for 5 Seconds
E3
Low Water Level – Water
Bath
Must Cover Top of Evaporator
E4
High Water Bath Temperature
Water Bath Temperature Greater
Than 45°F
E5
High Water Supply Pressure
Water Pressure Greater than
75 psi
E6
High Refrigeration
Temperature
Discharge Line Temperature
Greater than 190°F
E7
High Ice Bank Size
Ice Contacting Center Ice Bank
Probe
E8
Long Carb A Run Time
Energized for 7 Continuous
Minutes
E9
Long Carb B Run Time
Energized for 7 Continuous
Minutes
Part Number STH12 9/10
Cause
87
88
YES
DISPLAY
PRESSURE
>15 PSI
PRESS CARB A
BUTTON TO VERIFY
WATER
PRESSURE“PXXX”
GO INTO PROGRAM
MODE 1 PRESSURE
READOUT “P000”
NORMALLY CAUSED
BY WATER
PRESSURE <5 PSI
FOR 5 SECONDS
MUST STAY ABOVE
10 PSI TO CORRECT
EI
NO
E3
NOTE: THAT
ALL CARB
MOTORS AND
ALL CIRC
MOTORS WILL
GO OFF, WITH
THIS
ERRORCOMPR
ESSOR AND
AGITATOR
STAY ON
E2
E5
YES
DISPLAY
PRESSURE
>20PSI
PRESS CARB B
BUTTON TO VERIFY
CO2 PRESSURE
“PXXX” PSI
GO INTO PROGRAM
MODE 1 PRESSURE
READOUT “P000”
NORMALLY CAUSED
BY CO2 PRESSURE
<10 PSI FOR 5
SECONDS MUST
STAY ABOVE 15 PSI
TO CORRECT
E4
NO
E6
NO
NO
E8
YES/END
E3 ERROR
GOES OFF
ADD WATER TO
WATER BATH
ABOVE LEVEL OF
PROBE TIPS
E7
PRESS CIRC A BUTTON
TO VERIFY
CONDUCTIVITY“CL_X”
GO INTO PROGRAM
MODE 1
CONDUCTIVITY“C000”
YES
VERIFY WATER
LEVEL ABOVE
PROBE TIPS
NORMALLY
CAUSED BY
WATER LEVEL IN
WATER BATH
BELOW PROBE
CONDUCTORS
E9
ERROR CODES E1, E2, & E3 FLOWCHART
Part Number STH12 9/10
Part Number STH12 9/10
89
REPLACE
WATER PRESS
TRANSDUCER
020001992
YES
REPLACE CO2
PRESS
TRANSDUCER
020001992
YES
NO
SUPPLY
PRESSURE
>20PSI
SUPPLY
PRESSURE
>15PSI
NO
VERIFY CO2 SUPPLY
PRESSURE TO UNIT,
>20PSI OR NOT, WITH
ANOTHER GAUGE IN THE
SUPPLY SYSTEM
TROUBLESHOOT
WATER SUPPLY
SYSTEM, TO FIX
LOW WATER
PRESSURE
CONDITION
YES
REPLACE ERC
CIRCUIT BOARD
020001985
E VERIFY INCOMING
WATER SUPPLY
PRESSURE TO UNIT >15
PSI OR NOT WITH
ANOTHER GAUGE IN THE
SUPPLY SYSTEM
REPLACE ERC
CIRCUIT
BOARD
020001985
YES
TROUBLESHOOT
CO2 SUPPLY
SYSTEM, TO FIX
LOW PRESSURE
CONDITION
PULL CARB A OR
B CONNECTOR
OFF ERC, ERROR
GOES AWAY (CAN
USE TEMP)
NO
REPLACE ERC
CIRCUIT BOARD
020001985
YES
REPLACE LEVEL
PROBE 020002143
YES
E3 ERROR GOES
AWAY
= “CL_0"REMOVE
LEVEL PROBE
CONN FROM ERC,
SHORT ERC
LEVEL PROBE
PINS
NO
DISPLAY
CONDUCTIVI
TY= “CL_1”
90
E2
YES
VERIFY TEMP WITH SECOND
THERMOMETERIF STILL
<45°FREPLACE ERC BOARD
020001985
NO
WATER BATH
TEMP DISLAY
>45 °F
GO INTO PROGRAMMING MODE
1, “F000”PRESS CARB A BUTTON
TO SHOW WATER BATH
TEMP“FXXX” °F
NORMALLY CAUSED BY WATER
BATH TEMPERATURE > 45°F
EI
E3
E5
E6
NO
NO
VERIFY PRESSURE WITH
SECOND PRESS GAUGE
YES
WATER PRESS
>75 PSI
GO INTO PROGRAMMING MODE
1, “P000”PRESS CARB A BUTTON
TO SHOW INCOMING WATER
PRESSURE “PXXX” PSI
NORMALLY CAUSED BY WATER
PRESSURE >75 PSI,
E4
E7
E9
YES
LIQUID LINE
TEMP >200°F
VERIFY TEMPERATURE WITH
SECOND TEMP GAUGE
NO
GO INTO PROGRAMMING MODE
1, “F000”PRESS CIRC A BUTTON
TO SHOW LIQUID LINE TEMP
“FXXX” °F
NORMALLY CAUSED BY LIQUID
SIDE TEMPERATURE>200°F
E8
ERROR CODES E4, E5, & E6 FLOWCHART
Part Number STH12 9/10
Part Number STH12 9/10
91
NO
REPLACE WATER BATH
THERMISTOR
020002142
GO TO COMPRESSOR
TROUBLESHOOTING TO FIX
REFRIGERATION SYSTEM
YES
TEMPERATURE
VERIFIED
VERIFY TEMPERATURE
WITH SECOND
THERMOMETER
NO
VERIFY PRESS WITH
SECOND GAUGE, IF
CORRECTREPLACE ERC
BOARD 020001985
REPLACE WATER
PRESSURE TRANSDUCER
020001992
TROUBLE SHOOT WATER
SUPPLY SYSTEM TO FIX.
HIGH WATER PRESS,
REGULATOR BAD, NEEDED
YES
PRESSURE
VERIFIED
YES
TEMPERATURE
VERIFIED
VERIFY TEMP WITH SECOND
THERMOMETERIF STILL <200°F
REPLACE ERC CONTROL
BOARD 020001985
REPLACE DISCHARGE/LIQUID
LINE TEMPERATURE
THERMISTOR 020001991
GO TO COMPRESSOR /
REFRIGERATION SYSTEM
TROUBLESHOOTING
FIRST CHECK FOR
CONDENSER FAILURE OR HOT
GAS BYPASS
NO
92
E2
YES
UN-PLUG CARB B
CONNECTOR FROM ERC (#1)
TO VERIFY CONDUCTIVITY
OK
VERIFY ICE BANK PROBE
INSTALLED
CORRECTLYPLASTIC STEP ON
PROBE AWAY FROM EVAP
NO
PIN #2
COVERED IN
ICE
VERIFY VISUALLY THAT ICE
IS OVER ICE BANK PROBE
PIN #2 (MIDDLE PIN)
NORMALLY CAUSED BY ICE
ON ICE BANK PROBE PIN #2
(MIDDLE PIN)
EI
E3
E5
E6
NO
THEN CHECK FOR PUMP
OUTPUT(32 OZ IN LESS
THAN 20 SEC)
FIX LEAK
YES
LEAK IN
SYSTEM
FIRST CHECK FOR LEAK IN
CARB SYSTEM
NORMALLY CAUSED BY CARB
MOTOR A RUNNING > 7
MINUTES CONTINUOUSLY
E4
E7
E9
SAME AS E8 FOR CARB
B MOTOR/PUMP
E8
ERROR CODES E7, E8, & E9 FLOWCHART
Part Number STH12 9/10
Part Number STH12 9/10
93
YES
REPLACE ICE BANK
PROBE 020002091
YES
“E7” ERROR
GOES AWAY
NO
UN-PLUG ICE BANK PROBE
CONNECTOR (#3) FROM ERC
BOARD
NO
“E7” ERROR
GOES AWAY
REPLACE ERC
CONTROL BOARD IF
PROBLEM CONTINUES
020001985
COMPRESSOR ON TOO
LONGGOTO
COMPRESSOR /
REFRIGERATION
TROUBLESHOOTING
YES
PUMP GOOD
IF “E8” AND/OR “E9”
CONTINUE TO OCCUR
REPLACE ERC CONTROL
BOARD 020001985
RESET ERROR (PUSH CARB A
AND/OR B BUTTON OFF, THEN
ON TO RESET
NO
REPLACE PUMP
94
COMPRESSOR
WILL NOT COME
ON
VERIFY ICE BANK
PROBE TIP #1 IN ICE
COMPRESSOR
WILL STILL NOT
GO OFF
PULL CARB A CONN
TO RESET
CONDUCTIVE
PROBES
NO
COMPRESSOR
WILL STILL NOT
COME ON
VERIFY KEYPAD/DISPLAY GOOD,
SEE KEYPAD / DISPLAY TROUBLE
SHOOTING PAGE 7
COMPRESSOR
WILL NOT GO
OFF
COMPRESSOR
CHECK (LIQUID LINE
TEMP) AND EVAP OUT
TEMP
IF COMPRESSOR
COMES ON AND STILL
NO COOLING, USE
REFRIGERATION
TROUBLESHOOTING
CHECK CONNECTORS
AND WIRING TO FAN /
REMOTE
CONDENSERCHECK
MOTORS
OUTPUT TERMINALS
ARE COMMON TO
COMPRESSOR
OUTPUT TERMINALS
ON ERC
FAN / REMOTE
CONDENSER
REFRIGERATION
SYSTEM
NO/
END
AGITATOR
WILL NOT
COME ON WITH
KEYPAD
BUTTON / LED
REPLACE
YES
AGITATOR
WILL
STILL NOT
GO OFF
VERIFY
YES
AGITATOR
WILL
STILL NOT
COME ON
VERIFY KEYPAD/DISPLAY GOOD,
SEE KEYPAD / DISPLAY TROUBLE
SHOOTING PAGE 7
AGITATOR
WILL NOT GO
OFF WITH
KEYPAD
BUTTON / LED
AGITATOR
COMPONENT TROUBLESHOOTING
Part Number STH12 9/10
Part Number STH12 9/10
95
REPLACE ERC
CONTROL BD
020001985
ELSE
REPLACE ICE
BANK PROBE
020002091
PULL ICE BANK
CONN ON ERC,
COMPRESSOR
SHOULD GO OFF
NO
YES
VERIFY PROPER
VOLTAGE AT
COMPRESSOR
NO
NO
VERIFY VOLTAGE
AT CONTACTOR
COIL
VERIFY VOLTAGE
AT COMP OUTPUT
TERMINALS ON
ERC
VERIFY HPCO
SWITCH
CLOSEDSHORT
CONN 12
SHORT ICE BANK YES
CONNECTOR #3ALL
PINS
PROBES
NO
REPLACE
COMPRESSOR
CHECK
CONNECTO
RS AND
WIRING TO
CONTACTOR
COIL
REPLACE ERC
CONTROL BD
020001985
REPLACE
HPCO
SWITCH
REPLACE ICE
BANK PROBE
REPLACE
CONTACTOR
END
REPLACE
ERC
CONTROL
BOARD02
0001985
REPLACE
AGITATOR
MOTOR
VERIFY WIRING /
CONNECTORS TO
AGITATOR
MOTOR
IF NO
VOLTAGE
REPLACE
ERC
CONTROL
BOARD
020001985
VERIFY
VOLTAGE
ON ERC
AGITATOR
TERMINALS
96
Part Number STH12 9/10
CARB MOTOR
DOES NOT
TURNOFF
“CX00”
CARB
MOTOR
SHOULD BE
ON
YES /
END
YES /
END
VERIFY VOLTAGE
AT CIRC OUTPUT
TERMINALS ON
ERC
VERIFY KEYPAD /
DISPLAY WORKS,
CIRC LED GOES
ON AND OFF
VERIFY NO
“E1” ERROR
CIRC MOTOR
DOES NOT
TURNON
CIRCULATING
SYSTEM A OR B
CIRC MOTOR
DOES NOT
TURNON
FIRSTVERIF
Y PRG
MODE 2 IS
SET TO “002”FOR
BOTH CARB
PUMPS
“CX11”
CARB
MOTOR
SHOULD BE
OFF
PRESS CARB A AND/OR CARB B
BUTTON, VERIFY CARB A AND/OR B
CONDUCTIVITY PROBES
“CX__” X= A OR B
VERIFY NO “E1” ERRORGOTO
PROGRAM MODE 1 CONDUCTIVITY
“C000”
CARB MOTOR
DOES NOT
TURNON
CARBONATOR SYSTEM
A OR B
NO
YES
KEYPAD
BUTTONS NOW
WORK
REPLACE
ERC
CONTROL
BOARD
POWER ERC
OFF, THEN ON,
VERIFY NO
COUNTDOWN
“PdXX”ON
DISPLAY
VERIFY PROPER
VOLTAGE ON
ERC TERMINALS
L1 AND L2
KEYPAD
BUTTON(S) DO
NOT RESPOND,
RESPECTIVE
LEDS DO NOT
COME ON
TURN POWER
OFF THEN ON
TO RESET ERC
ERC POWER
LED NOT ON
KEYPAD /
DISPLAY NOT
WORKING
ERC CONTROL BOARD
AND KEYPAD /
DISPLAY
Part Number STH12 9/10
97
REPLACE ERC
CONTROL BOARD
020001985
CHECK ALL WIRES
AND CONNECTORS
FOR OPEN ON CARB
TANK WIRING
HARNESSCHECK
CARB MOTOR
YES
VOLTAGE
AT ERC
AGIT
OUTPUT
TERMINALS
NO
NO
REPLACE ERC
CONTROL
BOARD
020001985
YES
VOLTAGE
AT ERC
AGIT
OUTPUT
TERMINALS
NO
NO/
END
REPLACE
KEYPAD /
DISPLAY IF
BAD 020001986
ORIF
WIRES/MOTOR
OK, REPLACE
ERC BOARD
020001985
CHECK ALL WIRES
AND
CONNECTORS TO
CIRC MOTOR,
CHECK CIRC
MOTOR
NO
GENERAL NOTE: FOR DISPLAY PROBLEMS, IF
COUNTDOWN OCCURS ON POWER UP, “PdXX”,
THEN DISPLAY IS PROBABLY AT FAULT, NOT
ERC
IF DISPLAY FLASHES ERRATIC
NUMBERS / SYMBOLS, REPLACE
KEYPAD / DISPLAY020001986
REPLACE ERC CONTROL
BOARD 020001985
REPLACE KEYPAD / DISPLAY
020001986
YES
DISPLAY SHOWS
POWER UP
COUNTDOWN“PdXX”
Checklist
If a problem arises during operation of your post mix
soda refrigeration unit, follow the checklist below.
Routine adjustments and maintenance procedures are
not covered by the warranty.
! Warning
Only trained and certified electrical and plumbing
technicians must service this unit. All wiring and
plumbing must conform to national and local
codes.
Problem
Possible Cause
To Correct
Water only
dispensing:
No pressure
Regulator(s) out of
adjustment
Check/adjust regulator(s).
Syrup and CO2 only
dispensing:
Carbonator
Out of CO2
Install fresh tank.
Defective regulator(s)
Check/repair/replace
regulator(s).
CO2 line pinched,
kinked, or obstructed
Check/repair/replace CO2 line.
No power
Check power supply. Plug in
carbonator or reset breaker.
Water supply
Make sure water is turned ON.
Replace water filter.
Check/clean/replace pump
strainer.
Check/clean/repair water check
valve.
Check for frozen water line.
Internal Carbonator unit only.
Defective carbonator
Syrup and plain
water only
dispensing: No
pressure
One valve will not
dispense anything:
Is there power to
the valve?
98
Check/repair/replace carbonator
pump, motor, electrode or liquid
level control.
Out of CO2
Install fresh tank.
HP regulator out of
adjustment
Adjust HP regulator to the proper
setting.
Defective HP
regulator
Check/repair/replace HP
regulator.
CO2 line pinched,
kinked, or obstructed
Check/repair/replace CO2 line.
Broken wire or loose
connection
Replace/repair wire or connector.
Bad microswitch
Replace microswitch.
Part Number STH12 9/10
Problem
Possible Cause
To Correct
Beverage
dispensed is too
sweet:
Is the ratio (brix) of
the drink correct?
Flow control out of
adjustment
Adjust the flow control.
Insufficient soda flow
due to low carbonator
pressure
Adjust CO2 pressure or change
the tank.
Low CO2 pressure
due to leaks
Repair CO2 leaks.
Obstruction in the
water or soda line
Clean out the lines.
Flow control out of
adjustment
Adjust the flow control.
Soda flow too high
Reset CO2 pressure or replace
regulator if necessary.
Obstruction in syrup
line
Clean out the syrup line.
Over carbonation
Check CO2 supply. Reset
pressure or replace regulator is
necessary.
Dirty lines/valves
Clean/sanitize entire system.
Beverage is not
sweet enough:
Is the ratio (brix) of
the drink correct?
Drinks are foaming:
Are system
pressures correct?
Part Number STH12 9/10
99
No carbonated water
X
X
Carbon particles in drink
X
X
X
R
Flat drinks
X
X
R
X
X
X
X
X
R
R
X
Peculiar taste carbonated water
X
Peculiar taste non-carbonated
water
R
X
R
X
Peculiar taste syrup
X
Carb and booster pump noisy
X
R
X
X
R
R
X
Too much syrup
X
R
Too much carbonated water
X
Too much non-carbonated water
X
Foaming
X
R
R
Booster pump/motor won’t cycle
OFF
X
Booster pump/motor won’t cycle
ON
X
X
X
Low pressure CO2 alarm won’t
cycle OFF
X
Water found in primary regulator
X
X
R
Drinks too sweet
Low pressure CO2 alarm won’t
cycle ON
R
R
R
Air compressor operates
excessively
Excessive Carbonation
Water Filter
Water Booster
Syrup
Refrigeration
X
X
No or insufficient syrup
Loss of CO2 gas
Electrical
X
No or insufficient non-carbonated
water
Warm drinks
Dispenser
Compress Air
Circulating
Carbonated
CO2
Problem Cross-reference Guide
Booster pump/motor won’t cycle
OFF
X
Booster pump/motor won’t cycle
ON
X
Product dripping from nozzle
X
Valves will not activate
X
Valves will not shut OFF
X
Unit totally inoperative
X
X - Specific problem listed in section
R - Problem refer to from section with “X”
100
Part Number STH12 9/10
CO2 Gas System
On units not equipped with Air Pump, check all
Probable Causes listed below.
Qualifier
Probable
Cause
If leak occurs while
Change-over valve
is positioned on Air,
follow the “Probable
Causes” (for units
equipped with Air
Pump).
CO2 Tank
leaking.
Use a soap solution around CO2 Tank
valve Stem to locate leaks. If leaks are
present, bubbles will appear. If valve
Stem leaks at Tank, replace CO2
Tank.
CO2 Washer
damaged or
missing.
Use a soap solution around Primary
Regulator Coupling Nut and CO2 Tank
Stem. If bubbles appear, remove
Regulator and replace CO2 Washer
found inside Nut. Secure Regulator to
Tank and check for leaks.
Primary
Regulator
Diaphragm
leaking.
Use a soap solution around Primary
Regulator Adjustment Screw in
Bonnet. If bubbles appear, diaphragm
is leading. Replace Primary Regulator.
Ruptured Line
Assembly or
leaks at
connections.
Use a soap solution around all
connections. If bubbles appear,
tighten loose connections carefully.
A to B
Change-over
Valve leaking.
Use a soap solution around A and B
CO2 Tank Change-over Valve, tighten
if bubbles appear at Connections to
stop leaks.
CO2 Low
Pressure Switch
leaking.
Use a soap solution around Low
Pressure CO2 Switch. If bubbles
appear at pipe, tighten Connection. If
bubbles appear at Terminal end of
Switch - replace Switch.
CO2 Check
valve leaking.
Use a soap solution around Check
valve. If bubbles appear, tighten
Connection to stop leaks.
Back Flow
Preventer stuck
open.
Use a soap solution around Back Flow
Preventer. Tighten if bubbles appear
at connection. If bubbles appear at
Vent Hole on underside of Back Flow
Preventer, clean out or replace Back
Flow Preventer valve and
corresponding Water Check valve.
Carbonator
Tank Relief
valve leaking.
Use a soap solution around Relief
valve. If bubbles appear, replace
Relief valve.
Gas leak at the
syrup system.
Refer to Troubleshooting “Syrup
System” under No syrup or
insufficient syrup in finished drink.
Corrective Action
Loss of CO2
If leak occurs only
while Change-over
valve is positioned
on CO2, refer to
Troubleshooting
“Syrup System”.
Part Number STH12 9/10
101
Qualifier
Probable
Cause
Corrective Action
Flat drinks (lack of carbonation in carbonated water)
Primary Regulator
(less than 500 psi
[34.5 bar]).
CO2 Supply
exhausted (CO2
Tank is
functionally
empty if
pressure reads
less than 500
psi [34.5 bar]).
Verify CO2 Tank pressure is a
minimum of 500 psi (34.5 bar) on the
Primary Pressure Regulator Gauge
marked 0-2000 psi. Replace tank if
necessary.
Primary
Regulator out of
adjustment or
inoperative.
Verify CO2 Primary Regulators are set
at 90 psi (6.3 kg/cm2). Adjust if
necessary. If Regulator will not stay in
adjustment, replace Regulator.
A and B CO2
Tank
Change-over
Valve incorrectly
positioned.
If A and B CO2 Tank Change-over
Valve is positioned on an empty Tank
or halfway between A and B operating
positions, CO2 is not supplied to
Carbonators. Ensure valve handler is
in the “operating” position.
Malfunction of
the
Refrigeration
System.
Refer to Troubleshooting
“Refrigeration System” under Warm
drinks.
Water Filter
restricted.
Refer to Troubleshooting “Water Filter
System” under Peculiar taste.
Malfunction of
the Carbonated
Water System.
Refer to Troubleshooting “Carbonated
Water System” under Flat drinks.
Excessive
carbonation
(foaming).
Primary
Regulators set
too high.
Verify CO2 Primary Regulators are set
at 90 psi (6.3 kg/cm2). Adjust if
necessary. If Regulator will not stay in
adjustment, replace regulator.
Replace.
Low Pressure CO2
Warning light or
buzzer does not
come ON.
Warning lamp or
buzzer burned
out.
Transformer
inoperative.
When CO2 Tank is empty and CO2
warning lamp(s) or buzzer fail, verify
voltage across Transformer. If no
voltage, replace Transformer.
Pressure Switch
defective.
If CO2 Warning lamps or buzzer and
transformer are operative. Pressure
Switch is defective and must be
replaced.
CO2 Supply
adequate (greater
than 500 psi
[34.5 bar]).
102
Part Number STH12 9/10
Qualifier
Probable
Cause
Corrective Action
Flat drinks (lack of carbonation in carbonated water) (continued)
Low Pressure CO2
Warning light or
buzzer does not go
OFF.
Water found in CO2
Regulator and
lines.
Leaks on
system.
If leaks exist on CO2 System, not
enough pressure is maintained to
allow Pressure Switch to cut OFF CO2
Warning light or buzzer. Use a soap
solution to located possible leaks.
Tighten connections carefully.
Primary
Regulator out of
adjustment.
Check CO2 supply. The Primary
Regulators must be set at 90 psi
(6.3 kg/cm2). Adjust if necessary. If
regulator will not stay in adjustment,
replace regulator.
Pressure Switch
inoperative.
Carefully disconnect one wire from the
CO2 Pressure Switch, if CO2 Warning
Lamps go out, the CO2 Pressure
Switch is defective and should be
replaced. Carefully disconnect one
wire from the CO2 Pressure Switch, if
CO2 Warning Lamps go out, the CO2
Pressure Switch is defective and
should be replaced.
CO2 Check
Valve defective.
Turn CO2 OFF at CO2 Tank valve.
Remove top Cover from Remote
Refrigeration Unit. Locate CO2 Check
valve on top of Carbonator Tank.
Remove CO2 line on Inlet side of
Check Valve. If CO2 is present,
escaping from Carbonator Tank, clean
out or replace Check valve.
Part Number STH12 9/10
103
Carbonated Water System
Qualifier
Probable
Cause
Corrective Action
Flat drinks
Malfunctioning of
Refrigeration
System.
Beverages at
dispensing
tower are above
40°F (5°C).
Malfunctioning of
Circulating System.
Beverages at
dispensing tower
are below 40°F
(5°C).
Refer to Troubleshooting
“Refrigeration System” under Warm
drinks.
Refer to Troubleshooting “Circulating
System” under Warm drinks.
CO2 supply
exhausted.
Verify CO2 Tank pressure is a
minimum of 500 psi (35 kg/cm2) on
Primary Pressure Regulator Gauge
marked 0-2000 psi. Switch to full tank
if necessary.
Ensure CO2 Shut-off Valves to
Carbonators are both in the ON
position. Refer to Troubleshooting
“CO2 Gas System” under Flat drinks.
104
Primary CO2
Regulator out of
adjustment or
inoperative.
Verify CO2 Primary Regulators are set
at 90 psi (6.3 kg/cm2). Adjust if
necessary if Regulator will not stay in
adjustment replace Regulator.
Water Regulator
incorrectly
adjusted or
inoperative.
Verify Filtered Water Pressure Gauge
registers 55 psi (3.9 kg/cm2), if higher
than 55 psi, flooding of Carbonator will
occur. To adjust, loosen Locknut, turn
Adjustment Screw clockwise to
increase, counterclockwise to
decrease. If regulator will not respond
to adjustments, replace regulator.
Improper water
treatment.
Verify By-pass handle is in the “filter
operating” position. Ensure Filter
Cartridge is still effective, if necessary
replace Cartridge. Refer to
Troubleshooting “Water Filter System”
Carbonator
Pump worn
(Brass pump).
Dispense Carbonated Water while
listening for carbonator pump and
motor to cycle ON at Refrigeration
Unit. Pumps should operated between
6 to 12 seconds before cycling OFF. If
operating time exceeds 30 seconds
carbonator pump is worn, replace
Pump.
Pressure Relief
Valve is leaking.
Remove top cover from Remote
Refrigeration Unit. Dispense
Carbonated Water until carbonator
Pumps and Motor cycle ON. Observe
Pressure Relief Valves on carbonator
Tank. If water is observed escaping
from either, replace leaking Relief
valve.
Note: Do not confuse the Water Bath
Make-up valve for the carbonator Tank
Relief valves.
Part Number STH12 9/10
Qualifier
Probable
Cause
Corrective Action
Beverages at
Dispensing Tower
are below 40°F
(5°C). (continued)
Back Flow
Preventer.
Remove top cover from Remote
Refrigeration Unit. Use a soap
solution around Back Flow Preventer.
If bubbles appear at Vent Hole or
underside of Back Flow Preventer,
clean or replace Back Flow Preventer
and corresponding Water Check valve
carbonator Tank.
Double Check
valve (water)
stuck open.
With top cover from Remote
Refrigeration Unit removed and
carbonator Pump Switch and Water
turned OFF, loosen water supply line
at inlet side of Double Check valve
Assembly. If CO2 gas escapes from
Check valve, it must be cleaned or
replaced.
Part Number STH12 9/10
105
Qualifier
Probable
Cause
Corrective Action
No carbonated water at any of the dispensing valves
No CO2 gas or
water present at
dispensing valves.
CO2 gas is present
at dispensing
valves but no water.
106
Malfunction of
Refrigeration
System.
Refer to Troubleshooting
“Refrigeration System” under No
carbonated water at any of the
dispensing valves (freeze up).
Malfunction of
Circulating
System.
Refer to Troubleshooting “Circulating
System” under No carbonated water
at any of the dispensing valves.
No power to
carbonator.
Verify toggle switch for Carbonator is
in the ON position and Main Power
Supply is ON.
Water supply
restricted to
carbonator
pump.
Verify water to unit by observing
Filtered Water Pressure Gauge. It
should register 55 psi (3.9 kg/cm2). To
adjust, loosen Locknut, turn
Adjustment Screw clockwise to
increase, counterclockwise to
decrease. If regulator will not respond
to adjustments, replace regulator.
Examine Water Shut-off Valve(s) to
Carbonator and ensure they are in the
ON position.
Water Filter
restricted.
Place Filter By-pass Valve into the
Filter By-pass position. Replace
Cartridge Filter. Reposition valve
handle to “operating” position.
Water Inlet
strainer
clogged.
Remove Filter Screen from Inlet
Strainer in carbonator Pump (Brass),
flush with water to clean and
reassemble.
Liquid Level
Control
defective.
Push Toggle Switch for carbonator
and circulator to the OFF position.
Shut OFF Main Power Supply unit.
Remove electrical Access Panel from
unit. Locate liquid level control. Using
a pair of insulated needle nose pliers,
carefully remove the white wire from
the terminal marked “H” and the black
wire from the terminal marked “L” on
the Liquid Level Control Board.
Position safely to side. Turn ON Main
Power Supply. Push carbonator
Switch to the ON position. If
carbonator pump and motor do not
cycle ON immediately, that Liquid
Level Control is defective. Replace.
Electrode
Assembly
defective.
If Liquid Level Control is operating,
test the Electrode Assembly, refer to
Probable Cause “Liquid Level Control
Defective”. Verify wire leads are dry
and that they are not touching. If not,
replace Electrode.
Part Number STH12 9/10
Qualifier
Probable
Cause
Corrective Action
No carbonated water at any of the dispensing valves (continued)
CO2 gas is present
at Dispensing
Valves but no
water. (continued)
Carbonator
Pump worn
(Brass pump).
Dispense Carbonated Water while
listening for carbonator pump and
motor to cycle ON at Refrigeration
Unit. Pumps should operate between
6 to 12 seconds before cycling OFF. If
operating time exceeds 30 seconds,
carbonator Pumps is worn, replace
Pump.
Motor defective.
If Motor will not operate, verify voltage
across Motor Terminals with voltmeter.
If voltage reads 110 to 120 VAC, the
Motor or Pump is defective. Loosen
the Coupling Clamp with a flat-blade
screwdriver and disengage Pump
from Motor. If Motor still will not
operate with Pump disengaged, Motor
is defective. Replace.
Carbonator
Pump frozen.
Loosen the Coupling Clamp with a
flat-blade screwdriver and disengage
Pump from Motor. By hand, turn the
Coupling Key in back of Pump. If
pump shaft will not spin freely, Pump
is defective and must be replaced.
Part Number STH12 9/10
107
Qualifier
Probable
Cause
Corrective Action
Carbonator pump and motor will not cycle OFF (possibly noisy pump)
Little or no
carbonated water at
dispensing valve.
108
Primary CO2
Regulator
adjusted at
extremely high
pressure.
Verify CO2 Primary Regulators are set
at 90 psi (6.3 kg/cm2). Adjust if
necessary. If regulator will not star in
adjustment, replace regulator.
Water supply to
Carbonator
Pump shut-off
or restricted.
Verify water to unit by observing
Filtered Water Pressure Gauge. It
should register 55 psi (3.9 kg/cm2).
Examine Water Shut-off Valves to
carbonator and ensure they are in the
ON position. Examine Pump Strainer
for restriction. Clean if necessary.
Water Filter
restricted.
Place Filter By-pass valve into the
“Filter By-pass” position. If carbonator
pump and motor immediately cycle
OFF, Filter Cartridge is restricted.
Replace Cartridge.
Back Flow
Preventer or
Double Check
Valve.
Examine Filter Water Pressure
Gauge. If it registers 90 psi (6.3
kg/cm2) CO2 gas is passing from the
carbonator tank and through the Back
Flow Preventer or Double Check
Valve, preventing water from entering
pump. Clean or replace Back Flow
Preventer/Double Check Valve.
Carbonator
Pump worn.
Remove top cover from Remote
Refrigeration Unit. Locate Toggle
Relief Valve on Carbonator Tank and
lift lever to allow CO2 gas to escape
from Tank for 30 seconds. If during
this time Carbonator Pump cycles
OFF, pump is worn and should be
replaced.
Coupling Key
defective.
Loosen the Coupling Clamp with a
flat-blade screwdriver and disengage
Pump from Motor. Examine Coupling
Key in Pump. If defective, replace.
Part Number STH12 9/10
Qualifier
Probable
Cause
Corrective Action
Carbonator pump and motor will not cycle OFF (possibly noisy pump)
(continued)
Carbonated water
at dispensing valve.
Peculiar taste in
carbonated water
only.
Liquid Level
Control
defective.
Shut OFF main power supply to unit
and push Toggle Switch for
Carbonator and Circulator to the OFF
position. Remove Electrical Access
Panel from Refrigeration Unit and
locate Liquid Level Control. Strip a
1-1/2" (3.8 cm) piece of solid strand
wire of insulation to use as a jumper.
Turn main power supply unit ON to
unit. With a pair of insulated pliers,
jump across Terminals marked “G, H
and L” on Liquid Level Control.
Simultaneously, while pushing
corresponding Toggle Switch to
“carbonator” to the ON position. If
carbonator pump and motor continue
to operate after Liquid Level Control
Jumper Wire is in place, Liquid Level
Control is defective, replace.
Electrode
defective.
Examine wire leads to ensure no
breaks in connections. Remove and
clean Electrode with find sand paper
and reinstall.
Note: Reversing Electrode Wire
Leads on either electrode or Liquid
Level Control will cause erratic
operation of carbonator Motor. Refer
to Wiring Diagram.
Water filter
contaminated.
Refer to Troubleshooting “Water Filter
System” under Peculiar taste.
Back Flow
Preventer Valve
leaking or
Double Check
Valve leaking.
Push Toggle Switch for carbonator to
the OFF position. Turn Water Shut-off
Valve to carbonator to the OFF
position. Remove tope cover from
Remote Refrigeration Unit. Carefully
disconnect water line on the outlet
side of the carbonator pump. If water
or CO2 is observed continually
escaping from line, Back Flow
Preventer/Double Check Valve is
leaking. Disassemble, clean, and
replace if necessary.
Caution: Carbonated water must
never be allowed to flow through
materials other than plastic or
stainless steel. (Copper, zinc or
galvanized material is
non-acceptable.)
Carbonated
water flowing
through
materials other
than plastic or
stainless.
Trace carbonated water flow through
system. Ensure no foreign materials
are present. Replace non-acceptable
material if found.
Part Number STH12 9/10
109
Qualifier
Probable
Cause
Corrective Action
Carbonator pump and motor will not cycle OFF (possibly noisy pump)
(continued)
Carbon particles in
furnished drink.
Carbonator Motor
cycles ON and OFF
in short cycles.
110
Malfunction of
Water Filter.
Refer to Troubleshooting “Water Filter
System” under Carbon particles in
finished drinks.
Defective
Carbonator
Pump.
Remove top cover from Refrigeration
Unit. Loosen Coupling Clamp with a
flat-blade screwdriver and disengage
pump from motor. Turn the Coupling
Key by hand, in back of pump. If pump
shaft does not turn freely and/or
Carbon is found in pump, carbon
veins are defective. Replace pump.
Defective
Circulating
Pump.
Refer to Troubleshooting “Circulating
System” under Carbon particles in
finished drinks.
Electrode
Assembly
incorrectly wired
or defective.
Examine wiring diagram found on
Refrigeration Unit. Verify Electrode
wiring leads are on proper terminals of
both Electrode and Liquid Level
Control. If problem still occurs, replace
electrode.
Part Number STH12 9/10
Circulating System
Qualifier
Probable
Cause
Corrective Action
Warm drinks
Drinks warm
throughout the day,
warm all the time.
Malfunction of
Refrigeration
System.
Refer to Troubleshooting
“Refrigeration System” under Warm
drinks (carbonated water
temperature over 40°F [5°C]).
Drinks warm during
periods of low
demand, much
colder during
periods of high
demand.
No power to
Circulating
Motor.
Verify Switch to Circulating Motor is in
the ON position and Main Power
Supply is ON.
Carbon Particles in
finished drink.
Motor defective.
Using a flat-blade screwdriver, loosen
the Coupling Clamp and disengage
Pump from Motor. If Motor will not
operate, verify voltage across Motor
Terminal with voltmeter. If voltage
reads from 110 to 120 VAC, the Motor
is defective and should be replaced.
Circulating
Pump defective
(stainless steel).
Dispense approximately 1 gallon of
carbonated water at dispensing
valves. If temperature of carbonated
water drops, Circulating pump is not
operating. Examine Coupling Key
found between Pump and Motor
Shaft. If coupling key is defective,
replace. If key is operational,
Circulating pump is defective, replace.
Malfunction of
Water Filter.
Refer to Troubleshooting “Water Filter
System” under Carbon particles in
finished drinks.
Malfunction of
Carbonated
Water System.
Refer to Troubleshooting “Carbonated
Water System” under Carbon
particles in finished drinks.
Circulating
Pump defective
(Stainless
Steel).
Remove top cover from Refrigeration
Unit. Loosen Coupling Clamp with a
flat-blade screwdriver and disengage
Pump from Motor. Turn Pump shaft
with screwdriver. If Pump does not
turn freely and/or carbon is found in
Pump, carbon veins in pump are
defective. Replace Circulating Pump.
Malfunction of
Refrigeration
System.
Refer to Troubleshooting
“Refrigeration System” under No
carbonated water at dispensing
valve (freeze up).
Particles
obstructing flow
through
Circulating
Circuit (In-line
Strainer).
Remove top cover from Remote
Refrigeration. Push toggle switch to
carbonator and circulator to the OFF
position. Lift lever on Toggle Relief
valve at top of carbonator Tank until
pressure is completely released.
Remove In-line Strainer Screen. Flush
with clean water and reassemble.
Malfunction of
Carbonating
System.
If CO2 gas is present at the
Dispensing Valves and there is no
water, the problem is in the
Carbonated Water System. Refer to
Troubleshooting “Carbonated Water
System”.
No CO2 gas or
water present at
dispensing valve.
CO2 gas is present
at dispensing
valves but no
carbonated water.
Part Number STH12 9/10
111
Compressed Air System
Until repairs can be made on Compressed Air System,
place Air/CO2 Change-over Valve in the CO2
Operating position.
Qualifier
Probable
Cause
Corrective Action
No syrup
Air Compressor will
not cycle ON and
Air Pressure Gauge
registers 0 psi.
Air Compressor
cycles ON and OFF
and Air Pressure
Gauge readings
range between
70 psi (4.9 kg/cm2)
to 90 psi (6.3
kg/cm2).
112
No power to Air
Compressor.
Verify Toggle Switch to Air
Compressor is in the ON position and
main power supply is ON.
Pressure Switch
defective.
Remove Pressure Switch Cover and
use a voltmeter across Switch to
determine whether “open” or “closed”.
If in “open” position, replace switch.
Motor defective.
Verify voltage across Motor with a
voltmeter, if Motor/Pump assembly will
not operate, it is defective and should
be replaced.
Pump frozen.
Same as above for Motor defective.
Air/CO2
Change-over
Valve placed in
incorrect
position.
Place Air/CO2 Change-over Valve to
the Air or CO2 “operating” position.
Note: If lever is positioned between
Air and CO2 the gas supply is shut
OFF to syrup system.
Malfunction of
Syrup System.
Refer to Troubleshooting “Syrup
System”, under No syrup.
Malfunction of
Refrigeration
System.
Refer to Troubleshooting
“Refrigeration System”, under No
carbonated water at dispensing
valves (freeze up).
Part Number STH12 9/10
Qualifier
Probable
Cause
Air Compressor
operates
excessively.
Leak at Shake
Machine,
Orange Juice
Dispenser or
other optional
equipment.
Turn air supply to Shake Machine to
OFF position. If Air Compressor cuts
out and maintains pressure, leak is at
Shake Machine or Orange Juice
Dispenser. Refer to manufacturer’s
manual for Troubleshooting.
Leak at
Compressed Air
System.
Use a soap solution around all
connections starting from the Air
Motor/Pump assembly to the Low and
Medium Pressure Syrup Regulators. If
bubbles appear, tighten loose
connections carefully.
Automatic Drain
or Petcock
leaking.
Place drain line for bottom of
Automatic Drain or Petcock in cup of
water. If air bubbles appear, Automatic
Drain or Petcock is leaking. Clean
and/or replace as necessary.
Air leak in syrup
system.
Refer to Troubleshooting “Syrup
System” under No syrup, air leak at
syrup system.
Restricted
Germicidal Filter
on Air
Compressor.
Replace Germicidal Filter.
Note: This Filter is not designed to be
cleaned, but must be replaced when
exhausted.
Water in Air
Accumulator
Tank.
Verify Automatic Drain is operating. If
inoperative or defective, replace. If
unit is not equipped with Automatic
Drain use Petcock to remove water
from tank.
Motor/Pump
Assembly
inoperative.
If Motor/Pump assembly operate
without building up to 90 psi
(6.3 kg/cm2) as needed to cycle OFF.
Pump Assembly is defective and must
be replaced.
Pressure Switch
improperly
adjusted or
defective.
Observe Air Pressure Gauge to
ensure proper cycle ON at 70 psi
(4.9 kg/cm2) and cycle off at 90 psi
(6.3 kg/cm2) settings. Refer to
instructions found under Switch cover
for adjusting. If Switch will not respond
to adjustment, replace switch.
Check valve
defective.
While Air Compressor is in the OFF
cycle, use a soap solution around
Head Gasket on Motor/Pump
Assembly. If bubbles appear, replace
Check valve located on the Air
Accumulator Tank.
Contaminated
Germicidal Filter
on Air
Compressor.
Replace Germicidal Filter.
Note: This filter is not designed to be
cleaned, but must be replaced when
exhausted.
Water in Air
Accumulator
Tank.
Drain trapped water from tank by
removing Drain Line from top of
Automatic Drain. Disassemble and
clean Automatic Drain. If unit is not
equipped with automatic drain, use
petcock to remove water from tank.
Water Filter
contaminated.
Refer to Troubleshooting “Water Filter
System” under Peculiar taste.
Corrective Action
No syrup (continued)
Peculiar taste in
finished product.
Part Number STH12 9/10
113
Dispensing Valve and Tower
Qualifier
Probable
Cause
Corrective Action
All corresponding
valves dispensing
no syrup.
Malfunction of
syrup system.
Refer to Troubleshooting “Syrup
System” under No syrup or
insufficient syrup in finished drink.
No syrup at only
one dispensing
valve.
Syrup Shut-off
Valve closed or
partially closed.
Remove top cover from Dispensing
valve or Tower. Locate Syrup Shut-off
Valve on right hand side of Dispensing
valve. Verify shut-off is turned fully
open.
Mounting Block
restricted.
Remove Dispensing valve from
Mounting Block. Place cup over Syrup
outlet on Mounting Block and carefully
open Syrup Shut-off Valve. If little or
no syrup is present, Mounting Block is
restricted. Remove and clean
mounting block. Replace if necessary.
No syrup or insufficient syrup in finished drink
No carbonated
water at half or all
dispensing valves.
114
Flow Control
our of
adjustment or
inoperative.
Readjust Flow Control to proper Brix.
If no response, clean Syrup Flow
Control. Replace if necessary.
Valve Port
restricted.
Clean Syrup valve Port Assembly.
Seat swollen.
Replace Syrup Seat.
Solenoid Coil
defective.
Replace Syrup Solenoid Coil.
Malfunction of
Carbonated
Water System.
Refer to Troubleshooting “Carbonated
Water System” under No carbonated
water at any of the dispensing
valves.
Part Number STH12 9/10
Qualifier
Probable
Cause
Corrective Action
No carbonated water or insufficient carbonated water in finished drink
No Carbonated
Water only at one
dispensing valve.
Carbonated
water Shut-off
Valve closed or
partially closed.
Remove top cover from Dispensing
valve or Tower. Locate Carbonated
Water Shut-off Valve on left hand side
of Dispensing valve. Verify Shut-off
Valve is turned fully open.
Mounting Block
restricted.
Remove Dispensing valve from
Mounting Block. Place cup over
Carbonated Water outlet on Mounting
Block and carefully open Carbonated
Water Shut-off Valve. If little or no
Carbonated Water is present,
Mounting Block is restricted. Remove
and clean mounting block. Replace if
necessary.
Flow Control
our of
adjustment or
inoperative.
Readjust Flow Control to proper Brix
(5 oz in 4 seconds Standard valve,
10 oz in 4 seconds Fast Flow valve). If
no response, clean Carbonated Water
Flow Control. Replace if necessary.
Valve Port
restricted.
Clean Carbonated Water valve Port
Assembly.
Seat swollen.
Replace Carbonated Water Seat.
Solenoid Coil
defective.
Replace Carbonated Water Solenoid
Coil.
Carbonated
Water Switch
defective
(black).
Replaced Carbonated Water Switch.
Part Number STH12 9/10
115
Qualifier
Probable
Cause
Corrective Action
No water or insufficient water in finished drinks
All valves
dispensing
noncarbonated
drinks no water.
Water Shut-off
Valve closed or
partially closed.
Problem occurs at
only one dispensing
valve.
Refer to Troubleshooting “Water
Booster System” under Low or No
Water Pressure at Noncarbonated
Beverages.
Refer to this section on No
carbonated water at only one
dispensing valve in the dispensing
valve.
Too much Syrup,
Carbonated Water
or Water in finished
drink. Problem
occurs at only one
dispensing valve.
Syrup,
carbonated
water, or
noncarbonated
water flow
control out of
adjustment or
inoperative.
Readjust appropriate Flow Control. If
Flow Control does not respond to
adjustment, clean Flow Control.
Replace if necessary. Carbonated
Water Flow rates: (5 oz in 4 seconds
Standard valve, 10 oz in 4 seconds
Fast Flow valve).
Too much syrup in
finished drink. All
valves dispensing
same flavor-too
much syrup.
Malfunction of
syrup system.
Refer to Troubleshooting “Syrup
System” under Drinks too sweet.
Too much water in
finished drink. All
valves dispensing
noncarbonated
drink too much
water.
Malfunction of
water Booster
system.
Refer to Troubleshooting “Water
Booster System” under Qualifier:
Pump and motor cycles ON and
OFF excessively.
Syrup or
Carbonated Water
or Water dripping
from Nozzle.
Valve port
scarred.
Disassemble appropriate Syrup or
Water Assembly. Examine valve Port
for scars or nicks. Replace if
necessary.
Armature Spring
or Retaining
Ring broken.
Disassemble appropriate Syrup or
Water Assembly. Examine Armature,
Spring and Retainer Ring. If damaged,
replace.
Seat scarred or
obstructed.
Disassemble appropriate Syrup or
Water Assembly. Examine Seat, if
scarred, replace. If foreign material is
found in Assembly, remove,
reassemble.
Transformer
inoperative.
Verify wire leads from Transformer
have solid connections. Switch low
voltage lead from Transformer
supplying power to left and right hand
side of Tower. If Valves operate and
the other three do not, Transformer is
defective. Replace.
Dispensing
tower’s ON and
OFF Toggle
defective.
If after switching Leads, the three
valves still do not operate, the ON and
OFF Toggle Switch is defective.
Valves will not
activate when
Selection Panel
pressed. Problem
occurs at two (2) or
three (3)
consecutive Valves
on one (1) tower.
116
Part Number STH12 9/10
Qualifier
Probable
Cause
Corrective Action
No water or insufficient water in finished drinks (continued)
Problem occurs at
all valves on one
(1) dispensing
tower.
No power to
transformer or
transformer
defective.
Verify power with a voltmeter at wall
outlet. Verify power across low voltage
leads on transformer. If 24 volts are
present ON and OFF Toggle Switch is
defective. Replace.
Problem occurs at
only one (1)
dispensing valve.
Dispensing
tower’s ON and
OFF is Switch
defective.
Verify Main Power Supply and power
at Transformer Leads replace ON and
OFF Switch if operative.
Poor connection
on valve Wire
Harness.
Trace wiring on defective valve and
reconnect any loose wires. Clean and
reconnect any corroded connections.
Portion Control
Timer
inoperative.
Replace the problem valve Portion
Control Timer with a known Operative
Timer. If valve then operates, Portion
Control Timer was defective. Replace.
Selection
Switch
inoperative.
Replace defective Portion Control
Timer with operative Timer. If Valves
still will not activate, Selection Panel is
defective. Replace Selection Switch.
Poor connection
at Contact Clips
on Selection
Panel (with
Portion Control
Timer).
Examine Contact Clips on Selection
Panel and ensure proper contact
between Portion Control Timer and
Contact Clips.
Moisture on
Portion Control
Timer or
Contact Clips.
Remove top cover from Dispensing
Tower. Remove all moisture from
Portion Control Timer and Contacts.
Portion Control
Timer
Adjustment
Screw turned
beyond control
limit.
Turn Portion Control Adjustment
Screws on defective valve
counterclockwise 10 complete turns. If
valve shuts off when selection is
pressed, readjust for proper portions.
Valve will not shut
OFF.
Note: Several revolutions may be
necessary to bring control back into
range.
Portion Control
Timer defective.
Verify above probables are not the
problem. Push ON/OFF Switch for
Dispensing Tower to the OFF position.
If valve ceases to dispense when
pushed to ON position, Portion
Control Timer is defective. Replace.
Selection Panel
defective.
Push ON/OF Switch for dispensing
tower to the OFF position. If valve
ceases and then continues to
dispense when switch is pushed in
ON position, Selection Panel is
defective. Replace.
Part Number STH12 9/10
117
Qualifier
Probable
Cause
Corrective Action
No water or insufficient water in finished drinks (continued)
Foaming of finished
products.
Unit totally
inoperative; all
electrical switches
in the ON position.
118
Nozzles, Syrup
Tube Diffusers
dirty.
Remove and clean Nozzle
Assemblies and reassemble.
Warm drinks.
Refer to Troubleshooting
“Refrigeration System” under Warm
drinks.
Incorrect
pressure on
syrup.
Verify pressure supplied to sugar base
products is at 60 psi (4.2 kg/cm2).
Adjust Medium Pressure Regulator if
necessary. Verify pressure supplied to
diet product is at 15 psi (1.1 kg/cm2).
Adjust Low Pressure Regulator if
necessary.
Note: Ensure the Low Pressure
Supply Line has not mistakenly been
switched for a Medium Pressure
Supply Line on the diet tank.
Change-over
Valve Medium
or Low Pressure
is in the wrong
position.
Verify valve Medium to Low Pressure
is in the Low Pressure position for diet
products.
Air or CO2 gas
in syrup line.
Replace empty Syrup Tank. Dispense
Syrup from valve until consistent flow
is achieved and product stabilizes. If
evidence of air is still entering line,
replace Liquid Disconnect which is
allowing air to be drawn into syrup
supply.
Flake ice.
Only cube ice should be used for
carbonated beverages.
Improper
adjustment of
valve.
Ensure carbonated water flow is
properly set (5 oz. in 4 seconds
standard valve, 10 oz in 4 seconds
Fast Flow valve). Ensure Brix is
properly set. Adjust as necessary.
Power failure,
all power to
system is OFF,
or Fuse/Circuit
Breaker is
“open”.
Check Circuit Breaker. Reset.
Examine Time Delay, replace if
necessary.
Part Number STH12 9/10
Electrical System
Qualifier
Probable
Cause
Corrective Action
Fuse/Circuit
Breaker is
open.
Short Circuit or
overload within
unit.
Push Toggle Switches labeled carbonator
and circulator to the OFF position. Push the
Toggle Switches for Booster Pump, Air
Compressor, Agitator and Refrigeration to
the OFF position. Replace fuse(s) and
reset circuit breaker. Push the Toggle
Switches ON in the following sequence as
labeled below, to locate short or overload
within unit, waiting momentarily between
steps. *Agitator *Refrigeration *Carbonator
A and/or B *Circulator A and/or B (after
carbonator Motor Cycles OFF) *Booster
Pump *Air Compressor.
Push the Agitator Toggle Switch in the ON
position. If the fuse/circuit breaker opens,
the trouble is in the Agitator Motor Circuit.
This Circuit must be checked for shorts
and/or overload. If the fuse/circuit breaker
does not open after running about 1
minute, the problem is not in the Agitator
Motor Circuit.
Push the Refrigeration Toggle Switch in the
ON position. If the fuses/circuit breaker
opens, the trouble is in the Refrigeration
Circuit. Refer to wiring diagram for possible
faulty components. Push the carbonator
Toggle Switch A to the ON position. Draw
Carbonated Water from the Dispensing
valve until Pump cycles. If the fuse/circuit
breaker opens, the trouble is in the
carbonator Circuit. Refer to wiring diagram
for possible faulty components.
Push the carbonator Toggle Switch B to the
ON position. Follow procedure above for
carbonator A. Push the Circulator Toggle
Switch A to the ON position. If fuse/circuit
breaker opens, the trouble is in the
Circulator Circuit. Refer to wiring diagram
for possible faulty components. Push the
Circulator Toggle Switch B to the ON
position. Follow procedure above for
Circulator A.
Push the Booster Pump Toggle Switch to
the ON position (allow unit to cycle). If
fuse/circuit breaker opens, the trouble is in
the Booster Pump Circuit. Refer to wiring
diagram for possible faulty components.
Push the Air Compressor Toggle Switch to
the ON position. (Allow unit to cycle). If
fuse/circuit breaker opens, the trouble is in
the Air Compressor Circuit. Refer to wiring
diagram for possible faulty components.
Important Note: Worn out Circuit Breakers
or low voltage are frequently responsible
for shorts and overloads. Contact service
agent to examine possible defective Circuit
Breakers or low voltage.
Part Number STH12 9/10
119
Refrigeration System
Until repairs can be made on unit with no Ice Bank,
push Refrigeration and Agitator Switch to the OFF
position and ice down Bath using ice from Ice Maker.
Qualifier
Probable
Cause
Corrective Action
Warm drinks (carbonated water temperature over 40°F [5°C])
Compressor
operates but no ice
present at water
bath.
Compressor
operates but no ice
present at water
bath.
120
Water Bath
Feeder Valve
inoperative (not
enough water in
bath).
Remove tope cover from Remote
Refrigeration Unit. Verify if water level
is considerably below Stand Pipe. If
so, Water Make-Up valve is
inoperative. Remove, disassemble
and clean out valve. Replace, refill
Bath and allow carbonator to cycle
while inspecting valve to ensure
proper operation. Replace if
necessary.
Water leak
inside bath.
Remove top cover from Remote
Refrigeration Unit. Inspect Water Bath
at Stand Pipe. If considerable water is
observed running over and out the
drain, there is a water leak inside
Bath. The leak causes the Ice Bank to
melt as fast as it’s formed. Drain Bath
to located the leak, repair and refill
bath.
Fan or Motor
inoperative (air
cooled units).
Examine Fan and Motor on Air Cooled
Units at Condenser. If either are found
to be inoperative while compressor is
running, replace inoperative fan or
motor.
Caution: Inoperative Fan and Motor
can cause short cycling of
compressor.
Condenser
restricted.
For Air Cooled Units, clean the
Condenser removing all dust and lint.
On Water Cooled Units: Using a
thermometer verify temperature at
water discharge line. If operating
outside of the 95°F (35°C) to 105°F
(41°C) range, adjust Water Modulating
valve, replace.
Caution: Restricted Condenser can
cause short cycling of compressor.
Excessively
warm room.
Verify the Refrigeration Unit is
operating in a well ventilated area and
that there are no obstructions blocking
Condenser. If so, remove obstructions
if inoperative.
Lack of
Refrigerant
Charge.
Examine Sight Glass. If bubbles
appear while compressor is operating
system is low on charge. Refer to
Serial Plate for proper refrigeration
charge.
Defective
Expansion
valve.
If no bubbles appear in Sight Glass
then examine suction line, frost on the
suction line is a sign of defective
Expansion valve. Replace if
inoperative.
Part Number STH12 9/10
Qualifier
Probable
Cause
Corrective Action
Warm drinks (carbonated water temperature over 40°F [5°C]) (continued)
Compressor
operates with Ice
present at water
bath.
Compressor won’t
operate and no ice
at water bath.
Defective
Agitator Motor
Assembly.
Remove top cover from Remote
Refrigeration Unit. Examine the
Agitator Motor Assembly, ensure
propeller is secured to Agitator and
that the Agitator Switch is in the ON
position, allowing the water in Bath to
be agitated across the cooling coils. If
Motor or Propeller is inoperative,
replace.
Malfunctioning
of Circulating
System.
If ice is present on Evaporator Coil
and Agitator Motor Assembly is
operating the Refrigeration System is
functioning. However, the Circulating
System may not be functioning. Refer
to Troubleshooting “Circulating
System”.
Caution: Always make certain that
proper line voltage is present.
Defective
Switch.
Check to ensure Refrigeration Switch
is in the ON position.
Fuse/Circuit
Breaker open.
Locate Circuit Breaker box and
identify proper breaker for Remote
Refrigeration Unit. Ensure it is in the
ON position by switching OFF and
then ON again. If breaker will not
reset, refer to Troubleshooting
“Electrical System”.
Time Delay
Fuse burned
out.
Inspect Time Delay Fuses at the wall
quick shut-off panel. One of the fuses
may be burned out causing half the
unit to shut down. If this is suspected
replace all of the fuses.
Defective High
Pressure
Control.
Examine High Pressure Control to
ensure wire leads are securely
attached to terminals. If trouble is
suspected with control, replace.
Defective Ice
Bank Control.
Remove Electrical Access Panel and
using a voltmeter across the Ice Bank
Control, verify control is in the “closed”
position. If control is found to be in the
“open” position, that Control should be
replaced.
Defective
Contactor.
Remove Electrical Access Panel. Use
a voltmeter across Contactor Coil. If
current exists across Coil, and
Contactor remains “open”, Contactor
is defective. Replace.
Defective Relay
or Defective
Capacitor or
Defective
Overload.
Examine Relay/Capacitor/Overload to
ensure wire leads are securely
attached to terminals. Replace any
faulty components.
Defective
compressor.
If after checking each of the above
items, you still experience problems,
test compressor for possible defects
or grounding.
Part Number STH12 9/10
121
Qualifier
Probable
Cause
Corrective Action
No carbonated water at any of the dispensing valves
CO2 gas is present
at dispensing
valves but no
Carbonated Water.
Malfunctioning
of Carbonating
System.
No CO2 Gas or
water present at
dispensing valve.
On units equipped
with the “Red”
Refrigeration
Warning Light.
Refrigeration
Warning Light
cycles ON and OFF
with Compressor.
122
If CO2 gas is present at the
Dispensing Valves and there is no
water, the problem is in the
Carbonated Water System. Refer to
Troubleshooting “Carbonated Water
System”.
In a “freeze up” situation, push
Refrigeration and Agitator Toggle
Switches to the OFF position. Drain
water from Bath. Pour lukewarm
(never hot) water over the Product
Coils until thawed. Ice down Water
Bath using ice from Ice Maker until
further repairs can be made.
Defective
Agitator.
Examine the Agitator Motor Assembly.
Ensure Propeller is operating and
secured to Agitator and that the
Agitator Toggle Switch is in the ON
position. If Motor is inoperative,
replace.
Defective Ice
Bank Control.
Remove Electrical Access Panel. Use
a voltmeter across the Ice Bank
Control. Verify Control is in the “open”
position. If Control is stuck in the
“closed” position, the unit will “freeze
up”. Replace Control if necessary. If
unit builds and Ice Bank to the point of
extending into stainless steel coils, the
Ice Bank Control must be replaced.
Defective
Contactor.
Use a voltmeter across Contactor
Coil. If no current is present across
Coil, but Contactor remains “closed”,
Contactor is defective. Replace
defective Contactor.
Defective
Primary Ice
Bank Control.
When the Refrigeration Warning Light
illuminates, the Primary Ice Bank
Control is defective and should be
replaced. The Secondary Control
operates the Compressor until the
Primary Control is replaced.
Note: When the Refrigeration
Compressor cycles ON, Warning Light
will turn OFF. When the Compressor
cycles OFF the light will illuminate.
Part Number STH12 9/10
Syrup System
Qualifier
Probable
Cause
Corrective Action
No syrup or
insufficient syrup in
finished drink.
Syrup Tank is
empty.
Replace Syrup tank and purge air out
of Dispensing Valves affected, until
steady syrup supply is dispensed.
Kinked Syrup
lines.
Examine all exposed Syrup Lines and
relieve any sharp bends or kinks.
Note: Observe all independent lines
from Syrup Tank to Filters for kinks or
bends. Correct as needed.
Low Pressure
Regulator
inoperative.
Low Pressure Regulator controls the
pressure to diet beverages. Verify
pressure is set at 15 psi (1.1 kg/cm2).
To increase, adjust clockwise, to
decrease, adjust counterclockwise. If
regulator does not respond, repair or
replace regulator.
Medium
Pressure
Regulator
inoperative.
Medium Regulator controls the
pressure applied to the sugar based
beverages. Verify pressure is set at 60
psi (4.2 kg/cm2). To increase, adjust
clockwise. To decrease, adjust
counterclockwise. If regulator does
not respond, repair or replace
regulator.
Check Relief
valve restricted.
Disengage Gas Quick Disconnect on
suspected restricted flavor at Syrup
Tank. Depress Poppet valve on
bottom side of Gas Disconnect. If a
low or poor pressure supply is
apparent, replace Check Relief valve.
Gas/Syrup Tank
Plug Valves
inoperative.
Replace Syrup Tank. If this solves the
problem, tag defective tank so bottler
can make necessary repairs. (It is
extremely rare to have inoperative
Tank Plug Valves.)
Quick
Disconnects
(Gas or Syrup)
not fully
engaged on
Syrup Tank.
Disengage Quick Disconnects on one
Tank at a time. Rinse and clean with
warm water. Lubricate the O-ring on
the Syrup Tank Plug with water.
Reattach the Quick Disconnects to the
appropriate Syrup Tank Plug. Gas
Quick Disconnects are gray or have
two key slots. Syrup Quick
Disconnects are black or have three
key slots.
Quick
Disconnect
Valves or Tank
Jumper
inoperative.
Gas Quick Disconnects: Open the
Relief valve on the top of the syrup
tank lid. If the Gas Quick Disconnect is
opening properly, pressure should
continue to bleed from the Gas Relief
valve. If not, replace Gas Quick
Disconnect. Syrup Quick Disconnects:
Open the Dispensing valve (Syrup
Side only) for appropriate flavor.
Dispensing syrup for at least 10
seconds. If CO2/Air pockets appear in
syrup, replace Syrup Quick
Disconnect. If syrup flow is inadequate
or fluctuates during 10 seconds of
flow, replace Syrup Quick
Disconnects.
Part Number STH12 9/10
123
Qualifier
Probable
Cause
Corrective Action
No syrup of
insufficient Syrup in
finished drink.
(continued)
Gas leak at
Syrup System.
Use a soap solution around all
connections, starting from the Low
and Medium Pressure Regulators to
the base of the Syrup Tank Plugs,
observe Quick Disconnects, Tank Cap
and Gasket, Tank Plugs and Syrup
Tank O-rings for leaks. Repair and
replace if necessary.
Syrup Filter
restricted.
Disengage Syrup Quick Disconnect
from the appropriate Syrup Tank.
Relieve pressure at the corresponding
Dispensing valve. Remove the Screw
clamp and the Filter Screen. Wash the
Filter Screen with warm water and
reassemble.
Frozen Syrup
Coil.
Refer to Troubleshooting
“Refrigeration System” under No
carbonated water at any of the
dispensing valves (Freeze up).
Dispensing
valve
inoperative.
Refer to Troubleshooting “Dispensing
Valve and Tower” under No syrup or
insufficient syrup.
Low Pressure
Regulator
inoperative.
Verify Low Pressure Regulator set at
15 psi (1.1 kg/cm2). Adjust Regulator
if necessary. If Regulator will not
respond, repair or replace Regulator.
Medium
Pressure
Regulator
inoperative.
Verify Medium Pressure Regulator set
at 60 psi (4.2 kg/cm2). Adjust
Regulator if necessary. If Regulator
will not respond, repair or replace
Regulator.
Dispensing
valve
inoperative.
Refer to Troubleshooting “Dispensing
Valve and Tower” under Too much
syrup in finished drink.
Contaminated
Syrup.
Replace tank and sanitize the system.
Drinks too sweet.
Peculiar taste.
124
Part Number STH12 9/10
Water Booster System
Qualifier
Probable
Cause
Corrective Action
Low or no water pressure at noncarbonated beverages
Water Booster will
not cycle ON. Both
the pressurized
filter water and
filtered water
pressure register
55 psi (3.8 bar).
Water Booster
cycles ON and OFF
and pressurized
Filtered Water
Gauged readings
range between
65 psi (4.6 kg/cm2)
to 85 psi
(6.0 kg/cm2).
Pump and Motor
will not cycle OFF.
No power to
Water Booster
Pump.
Verify Toggle Switch for “Booster
Pump” is in the ON position and main
power supply is ON.
Pressure Switch
defective.
Remove Pressure Switch Cover and
use a voltmeter across terminals to
determine whether “open” or “closed”.
If in the “open” position, replace
Switch.
Motor defective.
If Motor will not operate, verify voltage
across Motor Terminals with a
voltmeter. If voltage reads from 110 to
120 VAC, the Motor is defective and
should be replaced.
Pump frozen.
Loosen the Coupling Clamp with a
flat-blade screwdriver and disengage
pump from Motor. Turn the Coupling
key by hand, in back of pump. If pump
shaft will not spin freely, Pump is
defective and must be replaced.
Water supply
shut-off after
Booster
System.
Examine Shut-off Valve to “Plain
Water to Unit” and “Water to Coffee
Machine” and ensure both are in the
ON position.
Frozen Water
Coil.
Refer to Troubleshooting
“Refrigeration System” under No
carbonated water at any of the
dispensing valves (freeze up).
Water supply to
Booster Pump
shut OFF.
Examine the Shut-off Valve to Booster
Pump and ensure valve is in the ON
position.
Restricted
Water Filter.
Observe Filter Water Pressure Gauge.
If pressure drops total of 40 psi
(2.8 bar) or more when pump cycles
ON. Replace filter.
Leak on Booster
System Pump
Strainer
obstructed.
Locate water leaks on system and
repair. Remove Pump Strainer at
Brass Booster Pump, flush screen
with water to clean. Reassemble and
position in place. Replace screen if
necessary.
Pump Coupling
Key defective.
Using a flat-blade screwdriver, loosen
Coupling Clamp and disengage Pump
from Motor. Examine Coupling Key, if
rounded off on either end, replace.
Pump defective.
Examine Pressurized Filter Water
Pressure Gauge. If Pump and Motor
continue to operate but fail to build up
to 85 psi (6.0 kg/cm2) in order to cut
off, pump is defective. Replace Pump.
Pressure Switch
improperly
adjusted or
defective.
Observe Pressurized Filtered Water
Pressure Gauge to ensure proper
cycle ON at 65 psi (4.6 kg/cm2) and
cycle OFF at 85 psi (6.0 kg/cm2).
Refer to instructions found under
Switch Cover for adjusting. If Switch
does not respond to adjustment,
replace switch.
Part Number STH12 9/10
125
Qualifier
Probable
Cause
Corrective Action
Low or no water pressure at noncarbonated beverages (continued)
Pump and Motor
cycles ON and OFF
excessively.
Peculiar taste in
Non-carbonated
beverages.
126
Leak on Booster
System.
Locate water leaks on system and
repair.
Check valve
defective.
Observe Filtered Water Pressure
Gauge. If pressure rises and drops
with Pressurized Filtered Water
Gauge, the Water Inlet Check valve
on Pump is defective. Replace Check
valve.
Pressure Switch
improperly
adjusted or
defective.
Observe Pressurized Filtered Water
Pressure Gauge to ensure proper
cycle ON at 65 psi (4.6 kg/cm2) and
cycle OFF at 85 psi (6.0 kg/cm2).
Refer to instructions found under
Switch Cover for adjusting. If Switch
will not respond to adjustment, replace
switch.
Accumulator
Tank pressure
set improperly.
Push Toggle Switch and Water
Shut-off Valve to Booster Pump to the
OFF position. Activate Plain Water
button until water flow ceases. Using a
tire gauge verify a 60 psi (4.2 kg/cm2)
charge on Tank. Recharge if
necessary.
Note: When charging Accumulator
Tank, only AIR should be used.
Accumulator
Tank bladder
ruptured.
Repeat procedures above. If water is
found inside Air Chamber when
verifying pressure charge, bladder is
ruptured. Replace Accumulator Tank.
Motor
overheating.
Using a flat-blade screwdriver, loosen
Coupling Clamp and disengage Pump
from Motor. Turn Coupling Key by
hand, in back of Pump. If Coupling
Key is difficult to turn, it may cause
defective Motor to overheat. Replace
Motor if necessary.
Water Filter
contaminated.
Replace Filter. Refer to
Troubleshooting “Water Filter System”
under Peculiar taste.
Accumulator
Tank bladder
ruptured.
Replace Accumulator Tank. Refer to
“Pump and Motor Cycle ON and OFF
excessively” Accumulator Tank
bladder ruptured.
Malfunction of
Carbonated
Water System.
Refer to Troubleshooting “Carbonated
Water System” under Peculiar taste,
Probable Cause: Back Flow Preventer
leaking.
Part Number STH12 9/10
Water Filter System
Until repairs can be made on the Water Filter, place
valve handle into “filter By-pass” position.
Qualifier
Probable
Cause
Corrective Action
Carbon particles in
finished drink.
Water By-pass
valve is not in
the “filtering”
position.
Verify By-pass valve handle is in the
Filter “operating” position. If particles
continue to appear, filter must be
serviced.
Defective or
damaged seal
on Filter
Cartridge.
Verify O-rings are not twisted or
nicked. Verify Cartridge is solid and
free of cracks. Replace if necessary.
Filter Cartridge
installed without
Inlet Seal.
Remove Cartridge from Canister.
Clean Canister Lid and Shell
assembly. Replace with new Filter
Cartridge, making sure to remove
Water Inlet Seal.
Defective
carbonator
Pump.
Refer to Troubleshooting “Carbonated
Water System”.
Defective
Circulating
Pump.
Refer to Troubleshooting “Circulating
System”.
Restricted
Water Filter.
Observe Filter Water Pressure Gauge.
If pressure drops at total of 40 psi (2.8
bar) or more when pump cycles ON,
replace filter.
Filter Cartridge
installed without
removing Water
Inlet Seal.
Removed Cartridge from Canister.
Clean Canister Lid and Shell
Assembly. Install new Filter Cartridge,
making sure to remove Cartridge Inlet
Seal.
Water supply to
Filer restricted.
Verify water supply is turned ON to
unit. Refer to Troubleshooting
“Carbonated Water System” and
“Water Booster System” for additional
solutions.
Water Filter
contaminated.
Place Filter valve into “Filter By-pass”
position. Replace Filter and reposition
valve handle to “filter operating”
position.
Carbonator and
Water Booster
Pump extremely
noisy.
Peculiar taste.
Part Number STH12 9/10
127
When the Brix is OFF
Air Compressor
70 psi (4.8 bar) ON
90 psi (6.2 bar) OFF
Filtered Water Pressure
Maximum Efficiency
55 psi (3.8 bar)
Service
Filters
CO2 High Pressure
90 psi (6.2 bar)
Drink Temperature
Below 39°F (3.9°C)
128
Part Number STH12 9/10
Bag-In-Box Usage
Medium Syrup
Pressure
60 psi (4.1 bar)
Syrup Tank Usage
Low Syrup
Pressure
Medium Syrup
Pressure
15 psi (1.0 bar)
60 psi (4.1 bar)
Pressurized Filtered Water Pressure (Water Booster)
65 psi (4.5 bar) ON
85 psi (5.9 bar) OFF
Part Number STH12 9/10
129
Problem
Probable
Cause
Solution
Drink too warm.
Refrigeration
switch OFF.
Turn ON refrigeration switch.
Condenser dirty.
Have condenser cleaned.
Condenser
obstructed.
Remove any objects blocking the air
flow in or out of the unit.
Circulator
switch OFF.
Turn ON circulator switch and allow
time for drinks to cool.
Note: If service is required, you can
continue to dispense cold drinks by
completing following this procedure.
1. Turn OFF the compressor switch
and agitator switch.
2. Drain the water from the water
bath. Reinstall the grey plastic
over-flow pipe.
3. Fill water bath with ice from the ice
machine.
4. Monitor frequently. Refill as
needed.
Not enough
carbonation.
Product foaming.
No syrup
dispensed.
No carbonated
water dispensed.
Product has an off
taste.
130
CO2 Shut-off
Valve OFF.
Open Shut-off Valve.
CO2 cylinder
empty.
Switch over to a new cylinder and
dispense carbonated water until
carbonation returns.
Dirty or sanitizer
soaked.
Clean or replace nozzles.
Warm drinks.
See “Drink too warm” under Problem
above.
Empty syrup
container.
Replace syrup container.
Air Compressor
is OFF.
Turn ON and plug-in the Air
Compressor.
Change-over
valve centered.
Position switch totally on either air or
CO2.
Carbonator
turned OFF.
Turn ON carbonator switch.
Water supply
turned OFF.
Turn ON water to the system.
Dirty nozzles.
Clean or replace nozzles.
Out of date
syrup.
Replace with fresh syrup.
Saturated water
filters.
Replace water filters.
Part Number STH12 9/10
Component Check Procedures
Test Procedures: MPC 64A Timer/
Selection Pad
MPC 64 A Timers can be placed in the test mode as
follows:
1. Flip power switch off.
2. While depressing “CAL” button on selection pad,
flip power switch back on.
3. Release “CAL” button when red LED comes on.
Faucets will energize for 2 seconds, each in
sequence, starting with faucet #1 (far left).
Timer is now in the Test Mode. To stop faucets use
one of two procedures:
A. Turn power switch off. This will save the
programmed times, Use this procedure for
testing or sanitizing.
B. Push “CAL” button. All programmed times for
all stations will go to factory default times.
Default times are:
Size #1 1 - 1.5 seconds
Size #2 4 - 4.5 seconds
Size #3 6 - 6.5 seconds
Size #4 8 - 8.5 seconds
PIN IDENTIFICATION
J-7 = Valve 1
J-10 = Valve 4
J-8 = Valve 2
J-11 = Valve 5
J-9 = Valve 3
J-12 = Valve 6
Check for 24 Volts at each solenoid cable connector,
J-7 through J-12, with cables removed.
With cables on, check for 24 VAC across solenoids at
dispensing valve while dispensing respective valve.
J-15 Power to Valves 1,2,3.
J-20 Power to Valves 4,5,6 and microprocessor.
Loss of power at J-15 results on loss of power to
valves 1,2,3.
Loss of power at J-20 results on loss of power to
microprocessor — no valves will work.
Part Number STH12 9/10
131
J-16 Station & Sizes
Revision May 28, 2003
#1 Stop/Fill
#2 Large
#3 Medium
#4 Small
#5 Valve 6 (or nothing on a 5 Valve tower)
#6 Valve 5
#7 Valve 4
#8 Valve 3
#9 Valve 2
#10 Valve 1
#11 Blank
#12 Extra Large
Use a jumper wire to make these connections to
determine if timer is functioning properly.
A. Jump pin 1 to pin 5,6,7,8,9,10. Appropriate
Valve should energize as long as pins are
jumped.
B. Jump pin 12 to pin 5,6,7,8,9,10. Valves
should pour EXTRA LARGE.
C. Jump pin 2 to pin 5,6,7,8,9,10. Valves should
pour LARGE.
D. Jump pin 3 to pin 5,6,7,8,9,10. Valve should
pour MEDIUM.
E. Jump pin 4 to pin 5,6.7,8,9,10. Valves should
pour SMALL.
J-17 CALIBRATION BUTTON & LIGHT
If microprocessor does not go into calibration, remove
connector at J-17. With jumper wire, jump 1st and 2nd
pins on left 3 times in less than 3 seconds. Replace
connector. Calibration light should be on
(microprocessor will be in the calibration mode). White
& White = calibration button. Red & Black = calibration
light. If CAL light does not come on LED is burned out
— replace keyboard.
132
Part Number STH12 9/10
Dual Transformers
*DUAL TRANSFORMERS MUST BE WIRED IN
PHASE*
To determine whether transformers are wired in
phase: With power on, take voltage reading at HOT
wire of each transformer. Reading should be
0 VOLTS*. If you read voltage, transformers are out of
phase. The positions of the wires on one transformer
must be switched.
*Black to White = 24V AC +/-10%
Black to Black = 0 V AC
Part Number STH12 9/10
133
New MPC84A Portion Control Board
A new portion control board, the MPC84A, has been
developed to improve the performance and maintain
the functions and features of the previous MPC64A. In
addition this PC board has passed the very
demanding EMC testing (radio frequency emissions
and interference) for European CE approval, at the UL
labs. The MPC64A has been phased out as of 6/96
and only the MPC84A will be used on new production
and service.
The new board is the same size, same mounting
locations, and uses the same connectors as the
previous board. This article is to explain some minor
differences and features which can be used to your
advantage.
The major difference is with the same size board, the
MPC84A can control up to eight stations (dispensing
valves), with up to four sizes per station. The MPC64A
could only control up to six stations.
The first drawing depicts the connectors on the
MPC64A.
The second drawing depicts the connectors on the
MPC84A.
The Power connectors J15 and J20 (24VAC) are the
same. The Keyboard connectors J16 for touchpad
sizes and J17 for calibration touchpad and light, are
the same.
The MPC 84A adds one more two pin keyboard
connector J1. For an eight station tower, this
connector, along with a separate two wire cable to the
proper Keyboard, provides the two extra stations.
The five pin valve connectors, J7 to J12 on the
MPC64A are changed to two pin connectors, J7 to J14
on the MPC84A. These valve connectors are not
polarized (does not matter how you connect the two
pins) except when the valve has a WATER or SODA
harness.
The calibrating functions of the new portion control
board are the same as the old board.
134
Part Number STH12 9/10
MPC64A Connectors
Part Number STH12 9/10
135
1
3
J15
1
J7
5
LD1
OLD
J8
LD2
J9
1
LD3
J16
LD4
12
1 J17
Model MPC84A
P/N 213373
J10
5
J11
LD5
J20
1
5
J12 LD6
MPC84A Connectors
136
Part Number STH12 9/10
1
3
J15
J7
1
LD1
LD2
NEW
J8
J9
LD3
1
J1
J10
LD4
1
J16
LD5
12
1 J17
Model MPC84A
P/N 216162
J11
5
J12
LD6
J13
LD7
J20
J14
1
5
LD8
FEATURES OF THE NEW MPC84A
• Can control up to 8 stations (valves).
• Hardware isolation and zero switching to minimize
electrical problems.
• Software improvements to noise.
CALIBRATION INSTRUCTIONS
(same as MPC64A)
1. To enter calibrate mode, press calibrate switch
three times in less than three seconds, and red
calibrate light will illuminate.
2. Place volume cup under nozzle of the valve to be
calibrated.
3. Press appropriate size switch and fill volume cup
to a point just short of the calibration mark on the
volume cup.
4. Let foam settle, jog size switch until liquid reaches
the appropriate calibration mark on the volume
cup.
5. To calibrate additional sizes, repeat steps 2 thru 4.
Special Features when in the Calibrate Mode
• To obtain an accurate 4.0 seconds pour from any
valve, press its associated STOP-FILL switch
once.
• To adjust all stations for the same size times, press
any station STOP-FILL switch twice in less than
two seconds, then repeat steps 2 thru 4 at this
station. The resulting times will be copied to all
stations when calibrate mode is exited.
Important
Use this mode, one size adjusts all, only for an
emergency (no time to adjust at all) and
temporarily. Each valve flow rate, ratio, and flow
regulators would have to be perfectly identical for
each valve to duplicate the same volume in the
same portion time.
6. To exit the calibrate mode, press calibrate switch
once and red calibrate light will go out.
Part Number STH12 9/10
137
NOTE: The new MPC84A does not have factory
default set times, like the MPC64A does. If a portion
size or station looses its calibration, the time(s) will go
back to minimum (.5 seconds). This means you can
check the total operation of the MPC84A by initiating
the TEST/CYCLING option, without changing the
calibration times, which could happen with the old
MPC64A.
TEST / CYCLING OPTION
1. Turn the power OFF to the tower/portion control.
2. Hold the calibrate switch ON and turn the power
ON at the same time.
3. The calibrate LED will illuminate, let OFF the
calibrate switch.
4. The dispensing valves will sequence from left to
right, valve #1 ON 4 seconds, then valve #2 ON 4
seconds etc., continuously repeating, until you
turn the power OFF, or press the calibrate button
once. This allows you to see that all valves work.
The keyboard or valve harness would have to be
at fault, if all the circuit board LEDs (LD1-LD8)
illuminate properly, and a valve or valves do not
dispense.
Secondly, this sequencing can be used to purge or
sanitize the system automatically. If you want more
than one valve at a time to dispense automatically for
4.0 seconds, just press station number for number of
valves simultaneously. That is, when in the cycling
sequence press station #2 (counting left to right) for
two valves simultaneous, meaning valve #1 and #2 will
dispense for 4 seconds, then #3 and #4, etc.,
continuously repeating until you turn the power OFF or
press the calibrate button once. If you press the station
#3, then 1 and 2 and 3 stations will dispense
simultaneously, then 4 and 5 and 6, etc. This allows
you to have as many valves purging/sanitizing, as the
drain will allow without overflowing.
RETROFITTING
When using the MPC84A as a service replacement
part, only the valve connectors have to be watched.
The power connectors and the keyboard connectors
138
Part Number STH12 9/10
are the same and go in the same places. The older
5 pin valve connectors will fit on the new board, as
long as you observe that the 5 pin connector goes on
with the two wires aligned to the two pins on the new
board. In case of the WATER and SODA switch
harness, it must be polarized, so reverse (connector
moved 180°) if WATER or SODA does not pour.
Part Number STH12 9/10
139
MOVs Field Testing
Metal Oxide Varistors installed on the water and
carbonated water buttons on, McDonalds style
dispensing towers, are designed to completely absorb
electrical spikes keeping them out of the
microprocessor circuit eliminating complaints of:
• Not holding calibration
• Valves flowing by themselves
• Two valves coming on at the same time, etc.
Multiplex has designed a field test procedure that will
expose a faulty MOV. This procedure will also work on
the older style capacitors.
The field test procedure:
Depress separately both the water and soda water
button rapidly 5 - 6 times. While doing this, watch all
other valves. If you notice any dripping or any other
valve trying to energize, the MOVs need to be
replaced.
NOTE: Factory installed MOVs have heat shrink tubes
on each terminal leg. Always check to make sure that
heat shrink has not slipped down and is insulating the
MOV leg inside the terminal connector.
Insulative
Tubing
MOV
BLK
COM
GRN/WHT
NO
NC
RED
140
Part Number STH12 9/10
Test Procedures: MPC84C Timer/
Selection Board
MPC 84B timers can be placed in the test mode as
follows:
1. Flip power switch OFF.
2. While depressing CAL button on selection pad,
flip power switch ON.
3. Release CAL button when red LED comes on.
Faucets will energize for 4 seconds, each in
sequence, starting with faucet #1 (far left). Timer is
now in the Test Mode. To stop faucets, use one of two
procedures.
• Turn power switch off. This will save the
programmed times. Use this procedure for testing
or sanitizing.
• Push CAL. All programmed times will be saved.
PIN IDENTIFICATION
J-1 = Valve 1
J-6 = Valve 6
J-2 = Valve 2
J-7 = Valve 7
J-3 = Valve 3
J-8 = Valve 8
J-4 = Valve 4
J-9 = Soda
J-5 = Valve 5
J-10 = Water
Check for 24 Volts at each solenoid cable connector,
J-1 through J-8, with cables removed.
With cables on, check for 24VAC across solenoids at
dispensing valve while dispensing respective valve.
J-15 Power to valves 1, 2, 3, 4 and microprocessor
J-20 Power to valves 5, 6, 7, 8 and microprocessor
Loss of power at J-15 results in loss of power to valves
1, 2, 3, and 4.
Loss of power at J-20 results in loss of power to valves
5, 6, 7, and 8.
Part Number STH12 9/10
141
J-16 Station and Sizes:
#1
Stop/Fill
#2
Large
#3
Medium
#4
Small
#5
Valve 6
#6
Valve 5
#7
Valve 4
#8
Valve 3
#9
Valve 2
#10
Valve 1
#11
Blank
#12
Extra Large
J-18 Stations
#1
Valve 7
#2
Valve 8
J-19 Stations and Sizes:
#1
Blank
#2
Valve 2 or 4 Flavor 1
#3
Valve 2 or 4 Flavor 2
#4
No wire
#5
Kid Size (Smallest)
Use a jumper wire to make these connections to
determine if timer is functioning properly.
1. Jump pin 1 on J-16 to pin 5, 6, 7, 8, 9, 10, and
pins 1 and 2 on J-18. Appropriate valve should
energize as long as pins are jumped.
2. Jump pin 12 on J-16 to 5, 6, 7, 8, 9, 10, and pins 1
and 2 on J-18. Valves should pour Extra Large.
3. Jump pin 2 on J-16 to 5, 6, 7, 8, 9, 10, and pins 1
and 2 on J-18. Valves should pour Large.
4. Jump pin 3 on J-16 to 5, 6, 7, 8, 9, 10, and pins 1
and 2 on J-18. Valves should pour Medium.
5. Jump pin 4 on J-16 to 5, 6, 7, 8, 9, 10, and pins 1
and 2 on J-18. Valves should pour Small.
6. Jump pin 5 on J-19 to J-16 pins 5, 6, 7, 8, 9, 10,
and pins 1 and 2 on J-18. Valves should pour Kid
Size.
142
Part Number STH12 9/10
J-17 CALIBRATION BUTTON AND LIGHT
If microprocessor does not go into calibration, remove
connector at J-17. With jumper wire, jump 1st and 2nd
pins on left 3 times in less than 3 seconds. Replace
connector. Calibration light should be on
(microprocessor will be in the calibration mode). White
& white = calibration button. Red & black = calibration
light. If CAL light does not come on, LED is burned out
— replace keyboard.
SECONDARY BOARD PIN IDENTIFICATION
J-1 = Valve 2 Flavor 1
J-2 = Valve 2 Flavor 2
J-3 = Valve 4 Flavor 1
J-4 = Valve 4 Flavor 2
Use a jumper wire to make these connections to
determine if timer is functioning properly.
1. Jump pin 2 or 3 on J-19 and pin 7 or 9 on J-16.
Then jump pin 1 on J-16 to pin 7 or 9 on J-16.
Appropriate valve should energize as long as pins
are jumped.
2. Jump pin 2 or 3 on J-19 and pin 7 or 9 on J-16.
Then jump pin 12 on J-16 to pin 7 or 9 on J-16.
Appropriate valve should pour Extra Large.
3. Jump pin 2 or 3 on J-19 and pin 7 or 9 on J-16.
Then jump pin 2 on J-16 to pin 7 or 9 on J-16.
Appropriate valve should pour Large.
4. Jump pin 2 or 3 on J-19 to pin 7 or 9 on J-16.
Then jump pin 3 on J-16 to pin 7 or 9 on J-16.
Appropriate valve should pour Medium.
5. Jump pin 2 or 3 on J-19 to pin 7 or 9 on J-16.
Then jump pin 4 on J-16 to pin 7 or 9 on J-16.
Appropriate valve should pour Small.
6. Jump pin 2 or 3 on J-19 to pin 5 on J-19. Then
jump pin 5 on J-19 to pin 7 or 9 on J-16.
Appropriate valve should pour Kid Size.
Part Number STH12 9/10
143
Back-flow Preventer Maintenance
The integral carbonator in this unit is equipped with a
back-flow preventer designed to protect the potable
water supply from CO2 contamination.
Important
The back-flow preventer must be checked at
least once every year to confirm that it is
functioning properly.
1. Shut OFF power to unit.
2. Shut OFF potable water supply to unit. Do not
shut OFF CO2 supply.
3. Remove top cover panel of unit and disconnect
inlet fitting from back-flow preventer.
NOTE: The carbonator tank is still pressurized.
4. Observe inlet of backflow preventer #1 check for
any discharge. If there is no discharge, #1 check
is OK. Proceed to step 5. If there is discharge,
proceed to step 6.
5. Disconnect and carefully remove #1 check
assembly. Avoid losing any internal parts.
6. Observe inlet of #2 check for any discharge. If
there is no discharge, #2 check is OK. Proceed to
step 7. If there is discharge, proceed to step 5.
7. Shut OFF CO2 supply and relieve pressure from
carbonator tank.
8. Remove back-flow preventer and install new
backflow preventer. Turn ON CO2 supply and
check for leaks.
9. Check water supply strainer upstream of backflow
preventer. Clean out and/or replace as required.
10. Reconnect water lines and turn water supply ON.
11. Turn ON power to unit.
144
Part Number STH12 9/10
Head Pressure Control Valve
Multiplex remote systems require head pressure
control valves with special settings. Replace defective
head pressure control valves only with “original”
Multiplex replacement parts.
OPERATION
The R404A head pressure control valve is non
adjustable.
At ambient temperatures of approximately 70°F (21°C)
or above, refrigerant flows through the valve from the
condenser to the receiver inlet. At temperatures below
this (or at higher temperatures if it is raining), the head
pressure control dome’s nitrogen charge closes the
condenser port and opens the bypass port from the
compressor discharge line.
In this modulating mode, the valve maintains minimum
head pressure by building up liquid in the condenser
and bypassing discharge gas directly to the receiver.
DIAGNOSING
1. Determine if the coil is clean. Air passes through
the condenser from the bottom up. Verify the coil
is clean by looking from the bottom up. Do not
look down through the fan.
2. Determine the air temperature entering the
remote condenser.
3. Determine if the head pressure is high or low in
relationship to the outside temperature. (Refer to
the proper “Normal Operating Pressures of
Refrigeration Units” in the Charts section.)
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.
NOTE: A head pressure control valve that will not
bypass, will function properly with condenser air
temperatures of approximately 70°F (21°C) or above.
When the temperature drops below 70°F (21°C), the
head pressure control valve fails to bypass and the ice
machine malfunctions. Lower ambient conditions can
Part Number STH12 9/10
145
be simulated by rinsing the condenser with cool water
during the freeze cycle.
Condition
Probable
Cause
Corrective
Measure
Discharge Pressure - High
Liquid Line Temperature - Hot
Valve stuck
in bypass
Replace
valve
Discharge Pressure - Low
Liquid Line Temperature - Cold
Valve not
bypassing
Replace
valve
Discharge Pressure - Low
Liquid Line Temperature - Hot
Ice
Machine
Low on
Charge
Low on
Charge
Verification
FAN CYCLE CONTROL VS. HEAD PRESSURE
CONTROL VALVE
A fan cycle control cannot be used in place of a head
pressure control valve. The fan cycle control is not
capable of bypassing the condenser coil and keeping
the liquid line temperature and pressure up.
This is very apparent when it rains or the outside
temperature drops. When it rains or the outside
temperature drops, the fan begins to cycle on and off.
At first, everything appears normal. But, as it continues
raining or getting colder, the fan cycle control can only
turn the fan off. All the refrigerant must continue to flow
through the condenser coil, being cooled by the rain or
low outside temperature.
This causes excessive sub-cooling of the refrigerant.
As a result, the liquid line temperature and pressure
are not maintained for proper operation.
146
Part Number STH12 9/10
Charging Multiplex Remote Refrigeration Unit
NOTE: System would have been opened for repairs.
Once completed, a vacuum of 500 microns would
have been maintained for 1/2 hour. The proper
procedure for charging the system includes the
reintroduction of all refrigerant that had been
recovered before making the repair.
1. Attach charging hose of gauge manifold to liquid
valve of the recovery cylinder (if no refrigerant
was in the system, and thus, no refrigerant was
recovered, attach charging hose to Refrigerant
cylinder). Open cylinder valve.
2. Place cylinder on charging scale-zero scale.
3. Open high side valve wheel of gauge manifold.
DO NOT ATTEMPT TO CHARGE SYSTEM ON
LOW SIDE—CHARGE IN A LIQUID STATE
ONLY WITH REFRIGERATION SYSTEM OFF.
4. Allow sufficient time for all refrigerant to transfer
from cylinder to refrigeration unit. If necessary, put
cylinder into bucket of hot water to increase the
internal pressure of the cylinder.
5. System total charge is the net result of:
A. Refrigeration Unit charge on nameplate
B. Remote line set length X .72 oz./ft.
C. 90% of condenser volume (cu. ft.) x
Refrigerant (wt./cu ft)
NOTE: Refrigerant weight varies with temperature.
R-404A weighs 72 lb/cu. ft. @ 32°; 62 lb/cu. ft. @ 95°
6. When all refrigerant has been transferred, close
valve wheel of the manifold.
7. Turn refrigeration unit on.
Part Number STH12 9/10
147
Compressor & Remote Condenser
FAN / REMOTE
CONDENSER
REFRIGERATION
SYSTEM
COMPRESSOR
COMPRESSOR
WILL NOT GO
OFF
OUTPUT TERMINALS
ARE COMMON TO
COMPRESSOR
OUTPUT TERMINALS
ON ERC
COMPRESSOR
WILL NOT COME
ON
CHECK CONNECTORS
AND WIRING TO FAN /
REMOTE
CONDENSERCHECK
MOTORS
VERIFY KEYPAD/DISPLAY GOOD,
SEE KEYPAD / DISPLAY TROUBLE
SHOOTING PAGE 7
COMPRESSOR
WILL STILL NOT
GO OFF
VERIFY ICE BANK
PROBE TIP #1 IN ICE
PULL ICE BANK
CONN ON ERC,
COMPRESSOR
SHOULD GO OFF
REPLACE ICE
BANK PROBE
020002091
IF COMPRESSOR
COMES ON AND STILL
NO COOLING, USE
REFRIGERATION
TROUBLESHOOTING
COMPRESSOR
WILL STILL NOT
COME ON
CHECK (LIQUID LINE
TEMP) AND EVAP OUT
TEMP
PULL CARB A CONN
TO RESET
CONDUCTIVE
PROBES
NO
SHORT ICE BANK YES
CONNECTOR #3ALL
PINS
VERIFY HPCO
SWITCH
CLOSEDSHORT
CONN 12
NO
REPLACE ICE
BANK PROBE
REPLACE
HPCO
SWITCH
ELSE
REPLACE ERC
CONTROL BD
020001985
148
VERIFY VOLTAGE
AT COMP OUTPUT
TERMINALS ON
ERC
NO
VERIFY VOLTAGE
AT CONTACTOR
COIL
NO
VERIFY PROPER
VOLTAGE AT
COMPRESSOR
YES
REPLACE ERC
CONTROL BD
020001985
CHECK
CONNECTO
RS AND
WIRING TO
CONTACTOR
COIL
REPLACE
CONTACTOR
REPLACE
COMPRESSOR
Part Number STH12 9/10
Agitator Condenser
AGITATOR
AGITATOR
WILL NOT GO
OFF WITH
KEYPAD
BUTTON / LED
AGITATOR
WILL NOT
COME ON WITH
KEYPAD
BUTTON / LED
VERIFY KEYPAD/DISPLAY GOOD,
SEE KEYPAD / DISPLAY TROUBLE
SHOOTING PAGE 7
NO/
END
AGITATOR
WILL
STILL NOT
GO OFF
YES
REPLACE
ERC
CONTROL
BOARD02
0001985
AGITATOR
WILL
STILL NOT
COME ON
YES
VERIFY
VOLTAGE
ON ERC
AGITATOR
TERMINALS
IF NO
VOLTAGE
REPLACE
ERC
CONTROL
BOARD
020001985
END
VERIFY WIRING /
CONNECTORS TO
AGITATOR
MOTOR
REPLACE
AGITATOR
MOTOR
Part Number STH12 9/10
149
Carbonation System A or B
CARBONATOR SYSTEM
A OR B
CARB MOTOR
DOES NOT
TURNON
CARB MOTOR
DOES NOT
TURNOFF
VERIFY NO “E1” ERRORGOTO
PROGRAM MODE 1 CONDUCTIVITY
“C000”
PRESS CARB A AND/OR CARB B
BUTTON, VERIFY CARB A AND/OR B
CONDUCTIVITY PROBES
“CX__” X= A OR B
“CX00”
CARB
MOTOR
SHOULD BE
ON
YES /
END
NO
VOLTAGE
AT ERC
AGIT
OUTPUT
TERMINALS
YES
CHECK ALL WIRES
AND CONNECTORS
FOR OPEN ON CARB
TANK WIRING
HARNESSCHECK
CARB MOTOR
FIRSTVERIF
Y PRG
MODE 2 IS
SET TO “002”FOR
BOTH CARB
PUMPS
“CX11”
CARB
MOTOR
SHOULD BE
OFF
YES /
END
NO
NO
VOLTAGE
AT ERC
AGIT
OUTPUT
TERMINALS
NO/
END
YES
REPLACE ERC
CONTROL
BOARD
020001985
REPLACE ERC
CONTROL BOARD
020001985
150
Part Number STH12 9/10
Circulation System A or B
CIRCULATING
SYSTEM A OR B
CIRC MOTOR
DOES NOT
TURNON
CIRC MOTOR
DOES NOT
TURNON
VERIFY NO
“E1” ERROR
VERIFY KEYPAD /
DISPLAY WORKS,
CIRC LED GOES
ON AND OFF
VERIFY VOLTAGE
AT CIRC OUTPUT
TERMINALS ON
ERC
CHECK ALL WIRES
AND
CONNECTORS TO
CIRC MOTOR,
CHECK CIRC
MOTOR
REPLACE
KEYPAD /
DISPLAY IF
BAD 020001986
ORIF
WIRES/MOTOR
OK, REPLACE
ERC BOARD
020001985
Part Number STH12 9/10
151
ERC Control Board, Keypad & Display
ERC CONTROL BOARD
AND KEYPAD /
DISPLAY
NO
KEYPAD /
DISPLAY NOT
WORKING
ERC POWER
LED NOT ON
KEYPAD
BUTTON(S) DO
NOT RESPOND,
RESPECTIVE
LEDS DO NOT
COME ON
VERIFY PROPER
VOLTAGE ON
ERC TERMINALS
L1 AND L2
TURN POWER
OFF THEN ON
TO RESET ERC
POWER ERC
OFF, THEN ON,
VERIFY NO
COUNTDOWN
“PdXX”ON
DISPLAY
KEYPAD
BUTTONS NOW
WORK
REPLACE
ERC
CONTROL
BOARD
YES
DISPLAY SHOWS
POWER UP
COUNTDOWN“PdXX”
NO
YES
REPLACE KEYPAD / DISPLAY
020001986
REPLACE ERC CONTROL
BOARD 020001985
IF DISPLAY FLASHES ERRATIC
NUMBERS / SYMBOLS, REPLACE
KEYPAD / DISPLAY020001986
GENERAL NOTE: FOR DISPLAY PROBLEMS, IF
COUNTDOWN OCCURS ON POWER UP, “PdXX”,
THEN DISPLAY IS PROBABLY AT FAULT, NOT
ERC
152
Part Number STH12 9/10
Programming / Auto Set
COMPRESSOR DOES NOT REACT
TO ICE BANK PROBE (SODA &
CHILLER UNITS) OR BEER UNIT
DOES NOT REACT TO WATER
TEMP PROBE
CARB A AND/OR CARB B MOTOR
STAYS ON CONSTANTLY WHEN
RESPECTIVE BUTTON ACTIVATED
INSTEAD OF STOPPING WHEN CARB
TANK IS FULL
GO INTO PROGRAM MODE 2
AND VERIFY CARB PUMP
SETTINGS
GO INTO PROGRAM MODE 3 AND
VERIFY COMPRESSOR CONTROL
SETTING CORRECT“-003” FOR
SODA & CHILLER UNITS(“-1273”
FOR BEER UNIT ONLY)
DISPLAY READS
“-003”
NO
ERC PROGRAM CHECKS ON
EVERY POWER UP, IF GOOD
THERMISTOR(S) (0-200°F)
ARE PLUGGED INTO CIRC A
AND CIRC B CONNECTORS
ON ERC
YES
EXIT, AND GO INTO
PROGRAM MODE
1CONDUCTIVITY
“C001”PRESS CARB A/B
BUTTON
YES
F PROGRAM MODE 3 IS SET
RIGHT FOR SODA / CHILLER UNIT
(“-003”), GO TO COMPRESSOR
TROUBLESHOOTING, IF
COMPRESSOR STILL NOT
COMING ON/OFF WHEN IT
SHOULD
NO
DISPLAY READS “1273”
WHICH IS BEER MODE
ONLYRE-PROGRAM MODE 3
TO ICE BANK PROBE “-003”
BY PRESSING COMP/AGIT
BUTTON ONCE
IF ONLY ONE, (OR NONE)
GOOD THERMISTOR IS
PLUGGED IN, THEN ONLY
THAT CONNECTOR (A OR B)
CIRC TEMPERATURE WILL
DISPLAY (AUTOSET)
DISPLAY READS
“CAOO”
YES
TROUBLE SHOOT CARB
TANK WIRING HARNESS
AND CONNECTORS,
LOOK FOR OPEN
CONNECTION AND
REPAIR / REPLACE
REPROGRAMMING
FIXES PROBLEM
IF TWO CIRCULATING
SYSTEM UNIT, VERIFY BOTH
THERMISTORS ARE GOOD
PRESS CARB A/B
BUTTON, DISPLAY
READS “-002”
NO
ONLY A OR B (OR NONE)
CIRCULATING WATER
TEMPERATURE DISPLAYED ON
KEYPAD, UNIT HAS TWO CIRC
SYSTEM
NO
ONLY ONE CIRC SYSTEM
TEMPERATURE (OR NONE) IS
DISPLAYING ON A TWO CIRC
SYSTEM UNIT
YES
REPEAT FOR CARB B
SYSTEM SETTINGS IF
NECESSARY
IF “CA11” REPLACE ERC
CONTROL 020001985
YES / END
NO
TROUBLE SHOOT ICE BANK
PROBE WIRING AND
CONNECTORS, LOOK FOR
OPEN CONNECTION AND
REPAIR / REPLACESEE
COMPRESSOR
TROUBLESHOOTING IF
Part Number STH12 9/10
IF EITHER OR BOTH “0”
DIGITS IS A “1”, REPROGRAM TO “0” VIA
PROGRAM MODE 2
INSTRUCTIONS
VERIFY CARB A & B
SYSTEMS WORK NOW,
SEE CARB SYSTEM
TROUBLESHOOTING IF
NECESSARY
REPLACE BAD
THERMISTOR(S) 020001991
(NOT MEASURING 0-200°F) OR
GOOD THERMISTOR(S) NOT
PLUGGED IN
VERIFY BOTH GOOD
THERMISTORS ARE
PLUGGED IN, THEN
TURN UNIT POWER
OFF, THEN ON, TO
REGISTER NEW
THERMISTOR(S)
IF NO TEMP DISPLAY
GO TO ERC / DISPLAY
TROUBLESHOOTING
153
ERC Component (Output) Connector Layout
C
AGITATIOR
R
CARB A
CARB B
CIRC A
CIRC
B
L
L/N
EARTH
PLUG THIS PIN
ERC Sensor (Input) Connector Layout
12
HPCO
11
CO2
10
9
8
7
6
5
4
3
WATER
TS
TD
TW
TB
TA
WL
ICE
HPCO SWITCH
COM
+5V DC
OUTPUT
COM
+5V DC
OUTPUT
SUCTION TEMP
DISCHARGE TEMP
WATER BATH TEMP
154
2
1
CA A
CA B
HIGH PROBE
LOW PROBE
GND
HIGH PROBE
LOW PROBE
GND
HIGH PROBE
LOW PROBE
GND
LEVEL PROBE
CIRC A TEMP
CIRC B TEMP
Part Number STH12 9/10
Component Specifications
Refrigeration Unit Specifications
Model
Number of Dispensing Heads
Type of
Container
2803
One 6-valve soda tower
Bag-in-Box
11M
One 6-valve soda tower or up to
three 2-valve root beer towers
Bag-in-Box
44M &
42M
Up to two 8-valve soda towers
Bag-in-Box
50M
Up to two 8-valve soda towers
Bag-in-Box
Super-Chill units do not apply to the above table, they
are only used to chill large amounts of water.
RATINGS
Model
Evaporator Rating
at 20°F (-6.5°C)
Heat Rejection (Max.)
Model
2803
2,500 BTUH
490 kcal/hr
4,500 BTUH
885 kcal/hr
Model
11M
5,150 BTUH
1,159 kcal/hr
8,638 BTUH
1,949 kcal/hr
Models
44M &
42M
9,700 BTUH
2,340 kcal/hr
13,576 BTUH
3,685 kcal/hr
Model
50M
14,900 BTUH
3,310 kcal/hr
20,400 BTUH
4,285 kcal/hr
Part Number STH12 9/10
155
S-250M Specifications
Countertop
Weights
175 lbs./79.5 kgs
Ice Storage
Capacity
up to 250 lbs./ 114 kgs of ice.
Electrical
Requirements
Dispenses: 120V/60Hz/2.8 FLA
Drain
Two 3/4" (1.96 cm) PVC (N.P.T.) drain
fittings. One pre-installed 3/4" (1.96 cm)
PVC fitting extends from drain pan.
A second fitting extends from bin.
Machine
Compatibility
Manual fill or top-mount with compatible
22" and 30" wide ice machines. Contact
factory for baffle and ice wide ice
machines.
Service
Motor, drain and electrical connections
are front serviceable.
MII-302 Specifications
Countertop
Weights
402 lbs. / 182 kgs
Ice Storage
Capacity
300 lbs. / 136 kgs
Electrical
Requirements
Dispenser: 120V/60Hz/3.5 FLA
Drain
Two pre-installed 3/4" (1.9 cm) PVC (N.P.T.) drain
fittings extend from drain pan. Ice bin drains
directly into drain pan for front clean out, no hook
up necessary.
Machine
Compatibility
Manual fill or top-mount with compatible 30" wide
ice machine. Certain top-mounted machines may
reduce storage capacity. Contact distributor or
Manitowoc Foodservice for baffle and ice maker lid
requirements for top-mounted ice machine
applications.
Service
Motor, drain and electrical connections are front
serviceable.
156
Part Number STH12 9/10
Charts
Refrigerant Charge
R-12
MODEL
P/N
16 EUTECTIC
200847
R-12 OZS/GRAMS
10/1304.1
37A
903750
73.6/2086.5
37W
903751
80/2267.9
37R
903753
194/5499.8
37TA
903770
74/2097.8
37TR
903771
172/4876.1
37TW
903772
80/2267.9
38HA
903801
18/510.3
38HW
903803
23/652.1
38HR
903804
98/27782
72AL
904666
49-1389.1
72WR
904667
57/1615.9
72WL
904668
57/1615.9
72LR
904682
151/4280.7
72RR
904683
151/4280.7
37AF
904707
74/2097.8
37RF
904708
172/4876.1
37WF
904709
80/2267.9
50A
905008
46/1304
50RC
905009
134/3798.8
50W
905010
57/1615.9
50HA
905011
36/1020.6
50HW
905012
44/1247.4
50HR
905013
150/4252.4
38A
905210
26/737.1
38R
905211
31/878.8
38W
905223
64/1814.3
51AEUTECTIC
905224
46/1304.1
2803A
902801
8/226.8
2803W
902803
6/170.1
1200A
32/907.2
1200W
36/1020.6
Part Number STH12 9/10
157
R-12 (Continued)
MODEL
P/N
2803W
902805
6/170.1
11AS
903722
12/340.2
37KA
903730
74/2097.8
37KR
903731
172/4876.1
37KW
903732
80/2267.9
38HAC
903806
18/510.3
38HAC
903807
18/510.3
38HAC
903808
18/510.3
39
903939
98/2778.2
39SC
903940
98/2778.2
D4610
904601
67.5/1913.6
37RF-1
904701
172/4876.1
371A
904710
74/2097.8
371R
904711
172/4876.1
371W
904712
80/2267.9
50HA-1
905017/20
36/1020.6
50FW-1
905018/24
44/1247.4
50HR-1
905019/22
150/4252.4
75A
907501
8/226.8
125A
912501
6/170.1
150A
915001
12/340
D4205A
942050/51
16/453.6
2000A
26/737.1
2000W
158
R-12 OZS/GRAMS
31/878.8
44KA
904419
25/708.7
44KR
904420
128/3628.7
44KW
904421
22/623.7 R502
44A
904400
25/708.7
44R
904401
128/3628.7
44R
904405
98/2778.2
44W
904406
22/623.7 R502
Part Number STH12 9/10
R-22
MODEL
P/N
11MA
901106
R-22 OZS/GRAMS
11/312
11MA2C
901108
11/312
150MA-1
915011
11/312
37KA22
903790
64/1814
37KR22
903791
151/4281
37KW22
903792
70/1984
37MA-P
904725
64/1814
37MR-P
904726
151/4281
37MW-P
904727
70/1984
44KA22
904440
47/1332
44KR22
904441
116/3289
44MR-G
904431
116-3289
44MR-P
904500
47/1332
44MW-G
904432
35/992
50MA
905030
42/1191
50MR
905031
140/3969
50MR
905036
140/3969
50MW
905032
52/1474
75A
907511
7/198
HC180
902809
7/198
HC340
901109
11/312
HC340S
901111
11/312
R2803A
902821
7/198
R2803W
902822
7/198
Part Number STH12 9/10
159
R-404A
160
MODEL
P/N
R-404A OZS/GRAMS
11M042C
901125
13.5/383
11MA04
901120
13.5/383
150A04
905121
13.5/383
2803A04
902830
10.5/298
2803A04B
902838
10.5/298
300MA04
930021
57/1616
3610R404C
936116
240/6804
38MA04
903850
39/1106
38MA04B
903859
39/1106
38MW04B
903855
29.5/836
38MW04
903852
26/737
44KA04
904490
57/1616
44KR04
904491
125/3544
44KW04
904492
57/1616
44MA04
904480
57/1616
44MA04E
904416
57/1616
44MR04
904481
125/3544
44MR04E
904417
125/3544
44MW04
904482
57/1616
44MW04E
904418
57/1616
450MA04
945013
113/3203
50MA04
905040
113/3203
50MR04
905041
145/4111
50MR04
905046
145/4111
50MW04
905042
113/3203
75A04
907521
10.5/298
D3610-04
936113
240/6804
D4810R04
948102
240/6804
HC900-04
903856
29/822
HC900S04
903858
29/822
Part Number STH12 9/10
Operating Pressures
33-55
9-20
24-44
9-20
10-100% Ice on
Evaporator
30-50
psig
150
75
psig
psig
130
140
75
75°F Evaporator,
or 80°F Water
psig
psig
Evaporator Pressure
R-404A
R-134A
R-502
R-12
R-22
240-320
130-180
230-300
120-170
90°F Condenser
Ambient
10-100% Ice on
Evaporator
210-280
210-280
110-160
200-260
100-140
75°F Condenser
Ambient
10-100% Ice on
Evaporator
180-240
psig
psig
R-134A
R-22
psig
psig
R-502
psig
R-12
Head Pressure
R-404A
NORMAL OPERATING PRESSURES OF
REFRIGERATION UNITS
1. On system with expansion valve (pressure
limiting) evaporator gets no higher than:
50 psig on R-12
53 psig on R-502
85 psig on R-22
2. Water system head pressure should be manually
set (adjustable water control valve) to maintain
105°F water condenser out temperature.
3. Remote Condenser system head pressure will be
controlled by Low Ambient Control
75 psig on R-12, R-134A
150 psig on R-502, R-22, R-404A
Part Number STH12 9/10
161
2.3-3.8
2.1-3.4
0.6-1.4
10-100% Ice on
Evaporator
1.7-3.0
0.4-1.2
10.3
9
9.7
24°C Evaporator,
or 27°C Water
R-404A
bar
bar
R-134A
R-22
bar
bar
R-502
R-12
Evaporator Pressure
bar
16.5-22.1
8.9-12.4
15.9-20.6
8.3-11.7
90°F Condenser
Ambient
10-100% Ice on
Evaporator
14.5-19.3
bar
14.5-19.3
7.6-11.0
bar
bar
12.4-16.5
bar
13.8-17.9
bar
6.9-9.7
Head Pressure
24°C Condenser
Ambient
10-100% Ice on
Evaporator
R-22
R-12
R-502
R-134A
R-404A
NORMAL OPERATING PRESSURES OF
REFRIGERATION UNITS
1. On system with expansion valve (pressure
limiting) evaporator gets no higher than
3.4 bars on R-12
3.7 bars on R-502
5.9 bars on R-22
2. Water system head pressure should be manually
set (adjustable water control valve) tomaintain
40.5°C water condenser out temperature.
3. Remote Condenser system head pressure will be
controlled by Low Ambient Control
5.2 bars on R-12, R-134A
10.3 bars on R-502, R-22, R-404A
162
Part Number STH12 9/10
Finished Drink
@ 5:1 Brix
Part Number STH12 9/10
44K-404 (R-404A)
50M-04 (R404A)
1995 (late)
1992 (mid)
1995 (mid)
37K-22 (R-22)
1990 (late)
Cold Plate
44K (Kit)
1990 (late)
44K-22 (R-22)
37K (Kit)
1987 (mid)
1992 (mid)
37T (Total PSI)
1982 (late)
1992 (mid)
37
37F (Fast Flow)
1981 (late)
72
36*
1978 (late)
1979 (early)
Twin
1200
1200
1969
1973 (late)
Slow Flow
6 oz. / 4 sec.
5 oz. / 4 sec.
Fast Flow
12 oz. / 4 sec.
10 oz. / 4 sec.
Single
Single
Single
N.A.
Single
Single
Single
Single
Single
Single
Single
Twin
Twin
Baths
Model
Two 100 GPH
One 100 GPH
One 100 GPH
N.A.
Two 100 GPH
One 100 GPH
Two 100 GPH
Two 100 GPH
Two 100 GPH
Two 100 GPH
Two 100 GPH
Two 100 GPH
Two 50 GPH
Two 50 GPH
Circulating
Pump GPH
1/2" ID
1/2" ID
1/2" ID
1/2" ID
1/2" ID
1/2" ID
1/2" ID
1/2" ID
1/2" ID
1/2" ID
1/2" ID
1/2" ID
3/8" ID
3/8" ID
Carb.
Water
Line Size
Fast
Fast
Fast
Fast
Fast
Fast
Fast
Fast
Fast
Slow/Fast
Slow/Fast
Slow/Fast
Slow
Slow
Flow
McDonald’s Models
History
*Only 100 units manufactured.
Soda Only
163
Sustained Draw Curve Charts
Inlet Temperature (°F)
SC180 SUSTAINED DRAW CURVE
Flow Rate (pounds/minute)
Inlet Temperature (°F)
SC340 SUSTAINED DRAW CURVE
Flow Rate (pounds/minute)
164
Part Number STH12 9/10
Inlet Temperature (°F)
SC1000 SUSTAINED DRAW CURVE
Flow Rate (pounds/minute)
Inlet Temperature (°F)
SC2000 SUSTAINED DRAW CURVE
Flow Rate (pounds/minute)
Part Number STH12 9/10
165
This Page Intentionally Left Blank
166
Part Number STH12 9/10
Ref.
Load
Red
Circ.
Control Box
Green
White
Black
Red
White
Symbols
Wire Nut, Small Yellow
Wire Nut, Large Black
Wire Attached to Component
Carbonator
Tank
Green
White
Black
White
Black
Agit.
Carb.
Red
Red
Red
Red
Black
Blue
Green Wire
Equipment Ground
To 204/120 VAC
3 and 4 Wire Supply
Comount Assembly
with Wires
4 x 4 Handi-box
Blue
White
Black
Red
Black
Blue
Red
Contactor
Red
Black
Black
Black
White
White
Black
Black
Black
3 Conductor
Cable
Blue
Ice Bank
Sensor
Black
Black
White
Blue
CO2 Signal
Transformer
Right Hand Unit
Only
24VAC
Air
Compressor
Motor
Water
Booster
Pump
Motor
4 x 2 Handi-box
Fan
Motor
Condenser Stand
Flex
Conduit
Assembly
Black
White
Flex
Conduit
Low
Pressure
Stitch
White
Fan
Motor
Comount
Assembly
with Wires
Compressor
Black
Agitator
Motor
Black
Circulation
Motor
Black
Carbonator
Pump
Motor
White
White
Black
White
White
White
White
Red
Black
Blue
Neutral
Black
Part Number STH12 9/10
Black
White
Red
Green Wire
Equipment
Ground
Metal
Conduit
120VAC
Black
Green
Diagrams
Wiring Diagrams
MODEL 72/72B AIR COOLED 3 PHASE
167
Red
Black
Low CO2
Pressure Switch
24VAC
CO2 Signal
Transformer
High
Pressure
Control
Black
Black
White
Run
Capacitor
Ref.
Black
Flex
Conduit
Assembly
White
White
Black
White
Control Box
Start
Capacitor
Agit.
Black
Black
White
Red
Black
Circ.
Red
White
Red
Black
Flex
Conduit
Assembly
Green
Agitator
Motor
Black
White
Carb.
Contactor
Red
Black
Start
Relay
Red
Black
Red
120VAC
120VAC
Black
Green
Green Wire
Equipment Ground
Metal
Conduit
Red
Water
Booster
Pump
Motor
Alternate Wiring
When the supply voltage is 230/115 VAC, disconnect autotransformer
(0021035) from the circuit.
1. Disconnect incoming power.
2. Remove transformer box cover.
3. Remove wire nut from black lead to H4.
4. Replace wire nut on exposed end of black lead.
5. Remove both red leads from (H1 and X1).
6. Connect red leads together with a wire nut.
7. Replace cover.
Part Number STH12 9/10
Black
Air
Compressor
Motor
Red
Black
Warning:
For 220VAC, rewire
per alternate wiring.
Ice Bank
Sensor
Red
Black
Black
Red
Black
White
Red
Compressor
White
Black
White
Black
Circ.
Motor
White
Condenser Stand
Flex
Conduit
Assembly
White
Black
Flex
Conduit
Transformer
Black
Wire Nut, Small Yellow
Wire Nut, Large Black
Wire Attached to Component
White
Symbols
Carb.
Pump
Motor
Green
White
Black
Load
Metal
Conduit
120VAC
Black
Green
Green Wire
Equipment
Ground
Carbonator
Tank
Cable
Jacket
Assembly
240VAC Output
Transformer (Automatic)
Red
Black
208VAC Input
Flex
Conduit
Liquid Level Control
Red
Black
Red
168
Red
Identified Terminal
Toggle Switch
White
Red
MODEL 72/72B AIR COOLED 1 PHASE
Ref.
Load
Red
Circ.
Control Box
Green
White
Black
Red
White
Symbols
Wire Nut, Small Yellow
Wire Nut, Large Black
Wire Attached to Component
Carbonator
Tank
Green
White
Black
White
Black
Agit.
Carb.
Red
Red
Black
Blue
Green Wire
Equipment Ground
To 204/120 VAC
3 and 4 Wire Supply
Comount Assembly
with Wires
4 x 4 Handi-box
Blue
White
Red
Black
Red
Black
Blue
Red
Contactor
Red
Red
Black
Black
Black
White
White
Black
Black
Blue
3 Conductor
Cable
Black
Ice Bank
Sensor
Black
Black
CO2 Signal
Transformer Right
Hand Unit Only
24VAC
White
Blue
Air
Compressor
Motor
Water
Booster
Pump
Motor
White
Condenser Stand
Flex
Conduit
Assembly
Black
White
Flex
Conduit
Low CO2
Pressure
Stitch
High
Pressure
control
Comount
Assembly
with Wires
Compressor
Black
Agitator
Motor
Black
Carbonator
Pump
Motor
Neutral
White
White
Black
White
White
White
White
Red
Black
Blue
Black
Red
Black
Part Number STH12 9/10
Black
White
Circulation
Motor
Green Wire
Equipment
Ground
Metal
Conduit
120VAC
Black
Green
MODEL 72/72B WATER COOLED 3 PHASE
169
Part Number STH12 9/10
White
“A” Carb.
“A” Circ.
“B” Carb.
“B” Circ.
Black
White
Green
Black
White
White
Blue
White
LLC
“A”
Carb.
Brown
Black
Black
Red
Warning for
37 A/37 W.
High Pressure
Control
Primary
Ice Bank
Control
“A” Circ. “B” Carb. “B” Circ.
Black
White
Blue
“A” Carb.
White
Blue
White
White
Brown
Black
White
Blue
Red
Green
Black
White
Blue
White
White
Black
Red
Green
Black
White
Contactor
Blue
Red
Black
Black
Green
Refrig.
Ice Bank
Control
Warning
Lamp
System
Warning Lamp
on Tower
Agitator
Red
Red
Red
Conduit
Wire
Nut
Pressure
Switch
Green
Secondary
Ice Bank
Control
120V
Transformer
White
Blue
Red
Red
120V
Blue
White
Black
Water
Booster
Pump
Motor
Fan
Field Insulated Wiring
Conduit 3 Wire
with Wires Cord
Compressor
3 Wire Cord
Air
Compressor
Motor
Pressure
Switch
Agitator
Motor
Wire Nut, Large
Wire Nut, Small
Carbonator
Tank “A”
Carbonator
Tank “B”
Remove Condenser
2x4
Branch
Box
Green
Blue
Black
Black
Toggle Switches
In 2 x 4 Branch
Boxes
Pressure
Switch
Syrup
Stand
2 x 4 Branch Box
Conduit Field Connection
White
Conduit with Wire
Black
Black
Red
Red
White
Black
Blue
Red
2 x 4 Branch Boxes
To 120/208 3 Phase
4 Wire, 60 Hz, 30 Amp
Supply or 240 VAC
3 Phase Delta Wire
grounded Center tap.
If 3 Phase Delta Connect
High Wild Leg To Red
Wire.
Green
White
Black
Black
White
White
White
Blue
Black
Red
Black
Blue
White
Conduit with Wire
White
Black
Green
Black
Conduit with Wire
White
White
Black
Green
170
White
Black
Green
Green Screws
Equipment Ground
MODEL 37
Wire Nut
Small
High
Pressure
Control
250 PSI
Primary
Ice
Bank
Control
Blue
White
White
Green
Wire
Equipment
Ground
Blue
Green
Black
Red
Blue
White
Blue
Red
Blue
Refrig.
Warning
Lamp
Model
371AF
Only
Blue
Secondary
Ice Bank
Control
Green
Capacitor
37AF
Fan
Motor
Green
Black
Red
Green
Red
Contactor
To 120/208 3 Phase
4 Wire, 60 Hz, 30 Amp
Supply or 240 VAC
3 Phase Delta Wire
grounded Center tap.
If 3 Phase Delta Connect
High Wild Leg To Red
Wire.
Blue
Black
Black
Red
Brown
Yellow
Yellow
Red
White
Black
Blue
Red
Yellow
Yellow
Green
Black
Red
Blue
Green
Blue
Part Number STH12 9/10
Ground
Screw
Black
Green
Refrig.
Blue
Blue
Green
#11
Relay
Model 371RF
Mac. 8
Condenser
Agitator
Field
Wiring
Agitator
Motor
Red
Black
Blue
Flex
Cond.
Compressor
Green
Black
Black
2 x 4 Handi Box
MODEL 371F
171
White
Wire Nut Large
Wire Nut Small
Blue
White
Red
White
Black
Red
“A” Circ.
“A” Carb.
Blue
“A”
Circ.
LLC
“A” Carb.
Black
“B”
Carb.
Black White
Booster
Pressure
Switch
Black
Preliminary
Ice Bank
Control
High
Pressure
Control
250 PSI
Black
Water
Booster Flex Cond.
White
Pump
Motor
“A”
Carb.
Blue
“B” Circ.
Black
White
Green
Black
White
White
Red
White
Black
White
Green
“B” Carb.
Black
White
Blue
White
Blue
Green
Black
Red
Green/ Yellow
Black
White
Green
White
Blue
Brown
Blue
Black
White
White
Transformer
120V
3 Wire
Cord
Secondary
Ice Bank
Control
Green
Yellow
White
Black
“B” Refrig. Pump
Circ. Warning Booster
Lamp
Black
White
Blue
White
Blue
Red
Contactor
White
Black
White
Brown
37AF Model
Fan 37AF
Motor Only
Air
Comp.
Black
Red
Blue
Black
Black
Red
Red
Green
Yellow
Blue
Red
Mac. 6
Condenser
#9
Relay
Model 37AF
White
Black
Ground
Screw
Green
Yellow
Compressor
Black
White
Load
Air Pump
Pressure
Switch
Compressor
Air
Pump
Motor
Soda
Conduit
CO2
Warning
Lamps on
Tower
Carbonator
Tank “B”
Black
White
Green
Flex
Cond.
3 Wire
Agitator Cord
Motor
Flex Cond.
Refrig.
Blue
Black
Agitator
Red
Green
LLC
“B” Carb.
Black
White
Green/ Yellow
Carbonator
Tank “A”
Black
White
Green
Field
Wiring
Blue
White
Yellow
Yellow
White
Black
Blue
Green
Yellow
Black
Black
172
Red
Black
Blue
To 120/208 3 Phase
2 x 4 Handi Box
4 Wire, 60 Hz, 30 Amp
Yellow
Supply or 240 VAC
Green Yellow
3 Phase Delta Wire
Green
Wire
Green
grounded Center tap.
Black Equipment
Black
If 3 Phase Delta Connect
Ground
Red
Red
High Wild Leg To Red Wire. Blue
Blue
White
Brown
Pressure
Switch
MODEL 37F
Part Number STH12 9/10
Brown
White
Lamp #4
Circ.
Motor
“B”
Note:
Relay Motor Start
Switch
Pressure Switch
Control Relay
Liquid Level Control
Ice Bank Control
Motor
Transformer
Connection Receptacle
Connector Plug
Terminal Strip
Part Number STH12 9/10
Lamp #5
Lamp
#3
Carb.
Motor
“B”
Lamp #2
Circ.
Motor
“A”
Lamp #1
Carb.
Motor
“A”
SW Filter
By-pass
Booster
Air
Pump Compressor
Motor
Motor
Syrup
Stand
IBC
2
Water
Bath
Agit.
Motor
M7
M5
Field
Connections
Refrigeration
Compressor
IBC
1
LLC
“B”
Carb. Tank Carb. Tank
“B”
“A”
High
PS-6 Pressure
Cut-out
Junction Box
With Air Fan
Cooled M8
Only
Control Box
LLC
“A”
With
Remote
Condenser
Only
Remote
Fan
Wht
Blk
Grn
MS
SW
PS
CR
LLC
IBC
M
T
J
P
TS
Grn
Blk
Wht
Neutral
Ground
Note:
On domestic remote and air units,
Wire #T3 goes to wire #T3 on
motor start relay.
Note:
Lamps 6 and 7 are out of CO2 lights
located on the dispensing towers.
Wiring is provided with conduit and
towers.
Lamp #7
Lamp #6
CO2
Panel
MODEL 37T
Conductor Color Codes
Domestic
Export
L1
Black
L1
Black
L2
Red
L2
Brown
L3
Brown
L3
Brown
L4
White
L4
Lt Blue
L5
Grn/Yel
L5
Grn/Yel
Incoming Power – 3 Phase, 4 wire
wiring supplied by installer from
junction box to fan.
Note: all switches shown in their
normal positions.
173
MODEL 37T SCHEMATIC DIAGRAM
Grn/Yel
Wht
Incoming
Power
3 Phase
4 Wire
Blk
MS
Red
MS
Brn
MS
SW 1
SW 2
Refrig. Compressor
M9
CR1
LLC “A”
M8
AJR or Remote
Fan Motor
M1
Carb. “A” Motor
CR1
Circ. “A” Motor
M2
R
SW 3
SW 4
CR2
LLC “B”
Lamp 1
Carb. “B” Motor
M3
CR2
Circ. “B” Motor
M4
R
SW 5
Low Incoming Water
Press Carb. “A”
CR3
PS-4
SW 6
PS-5
Lamp 2
Low Incoming Water
Press Carb. “B”
M5
Booster Pump Motor
R
Low Incoming Water
Press Booster Pump
Lamp 3
M6
Air Comp Motor
M7
Agitator Motor
SW 7
SW 8
IBC-2
IBC-1
PS-6
M5
R
Lamp 4
T1
JI-1
SW-9
Refrig Comp Motor
Start Relay
Primary Ice Bank
Control Failure
Lamp 5
JI-2
A
Filter In By Pass
CR1
Carb “A” Low Press
Relay
PS-1
PS-2
CR2
PS-3
PS-7
CR3
Carb “B” Low Press
Relay
Booster Pump Low
Press Relay
A
Lamp
6
Out of CO2 Tower 1
A
Out of CO2 Tower 2
Lamp 7
J2
99
174
Part Number STH12 9/10
Lamp #4
Tower #2
R fi
ti
Lamp #3
Tower #1
M6
Refrig.
Comp
LLC
“B”
Remote
Fan
With
Remote
Condenser
Only
IBC
2
With Air
High
Cooled Pressure
Only
Cut-out
IBC
1
Carb. Tank Carb. Tank
“B”
“A”
LLC
“A”
24 VAC
CO2
Panel
Agit.
Motor
MS
SW
PS
CR
LLC
IBC
M
TS
Component Legend
Relay Motor Start
Switch
Pressure Switch
Control Relay
Liquid Level Control
Ice Bank Control
Motor
Terminal Strip
Note: Out of CO2 (24 Y) lamps
#3 and #4 located on dispensing
towers wiring supplied with
conduit and towers. For
Schematic wiring see tower
wiring diagram.
Part Number STH12 9/10
Lamp #1
Lamp #2
Circ.
Motor
“B”
Neutral
Ground
Carb.
Motor
“B”
Circ.
Motor
“A”
Carb.
Motor
“A”
All switches shown in their normal position.
2.
Notes:
On domestic remote and air units, wire #13 goes to terminal #T3 on MS (Motor Start Relay).
On Export remote and air unit wire #13 goes to Neutral (TS#11).
MODEL 37K
Conductor Color Codes
Domestic
Export
L1
Black
L1
Black
L2
Red
L2
Brown
L3
Brown
L3
Brown
L4
White
L4
Lt Blue
L5
Grn/Yel
L5
Grn/Yel
Incoming Power – 3 Phase, 4 wire
wiring supplied by installer from
junction box to fan.
175
MODEL 37K SCHEMATIC DIAGRAM
Grn/Yel
Lt. Blu
Blk
Blk
Red
Red
Brn
Brn
Compressor
Grn/Yel
Incoming
Power
3 Phase
4 Wire
Fan Motor
Yellow (Remote)
Blk (Air)
H6
Grn/
Yel
Yellow (Remote)
Brn (Air)
Blk
Brn
Lt. Blu
M1
Grn/
Yel
CR1
Lt. Blu
Blk
Blk
Circ “A”
On/Off
Switch-2
Blk
LLC-A
Grn
Wht
Blk
Carb “A”
On/Off
Switch-1
CR1
Blk
Blk
M2
Lt. Blu
Carb. “A” Motor
Circ. “A” Motor
Grn/
Yel
Low Incoming
Water Press
Warning Light
Carb “A” Motor
Low Press Relay
Carb “B” Motor
Low Press Relay
PS-1
R
Blk
Lt. Blu
CR1
Lt. Blu
Blk
CR2
Grn
Wht
Blk
Carb “B”
On/Off
Switch-3
Brn
Brn
Lt. Blu
M3
Grn/
Yel
CR2
Lt. Blu
Brn
Brn
Circ “B”
On/Off
Switch-4
Brn
LLC-B
CR2
Brn
Brn
M4
Blk
Blk
Circ “B” Motor
M5
Ribbed
Agitator Motor
Grn/Yel
Refrig
On/Off
Switch-6
PS-2
IBC-1
IBC-2
Blk
Blk
Blk
Brn
MS
Blk
Blk
176
Lt. Blu
Grn/
Yel
Agitator
On/Off
Switch-5
Blk
Carb “B” Motor
R
Lt. Blu
Refrig Comp
Motor Start
Relay
Primary I.B.C.
Failure Warning
Light
Part Number STH12 9/10
MODEL 44A & R WIRING DIAGRAM
Agitator
Motor
Carb.
Pump
Motor
Circ.
Pump
Motor
Blk
Carb.
Pump
Motor
Black
Agitator
Black
Ribbed
Conductor
Contactor
Blk
Green
Brn
Blu
Black
Carb. A
Black
Wht
Wht
Wht
Wht
Black
Red
Load
Wht
Blk
Brn
Brn
High Pressure
Limit Switch
Wht (Neutral)
Brn
Refrig.
Brn
Yellow
Yellow
Model
44 R Only
Field
Wire
Black
Circulator
“J” Box
Blk
Start
Line
Brn
Relay
Term
230 VAC
60 Hz
Start
Blu
1 Ph
Cap.
Red
Blk
Run
Cap. Capacitor
Box
(See Cover)
Part Number STH12 9/10
Model
44 A
Only
Brn
Remote
Condenser
Model 44A
Only
Term
Block
Blk
Carb.
Tank
Compressor
Cond.
Fan
Ice Bank
Control
Model 44 A
Only
Brn
Yellow
177
MODEL 44K WIRING DIAGRAM
208-230/60Hz 1 Phase
L1
L2
L3
Lamp 4
R
PS1
SW1
PS2
CR1
Lamp 1 R
IBC2
Low Water
Pressure
IBC1
MS
SW2
M1
Lamp 2
GR
SW3
Agitator
Motor
LLCA
M2
CR1-1
Lamp 3
LLCB
Carb. “A”
R
M3
Carb. “B”
M4
Circ.
Motor
SW4
MS
CR1-2
MS
CL
R
S
Compressor
Start
Relay
PS
Fan Motor
Start Cap
Run Cap
Component Legend
MS
178
Relay Motor Start
SW
Switch ON/OFF
PS
Pressure Switch
CR
Control Relay
LLC
Liquid Level Control
IBC
Ice Bank Control
M
Motor
TS
Terminal Switch
Part Number STH12 9/10
Ribbed
Agit.
Motor
M1
Black
Carbonator
Red
White
Black
Green
Carb.
Motor
“A”
M2
Black
Incoming Power
208/230 I.P. H. (2 Wire)
Green/Yellow (Ground)
Brown
Blue
Remote Fan (Yellow)
Remote Fan (Yellow)
Circ.
Motor
M2
Junction Box
Carb.
Motor
“B”
M2
HS
Brown
Black
Blue
Red
Black
Brown
Green
Red
Black
Relay
Black
Black
Black
CR1
Compressor
Lamp 4
a
d
LLC L
“B” o
Fan
Motor
M5
Circulator
Switch
#4
Carbonator
Switch
#3
Agitator
Switch
#2
Blue
Black
Brown
Air
Comp.
Motor
M6
Black
Blue
Water
Booster
Motor
M7
Blue
Brown
(Optional Air Compressor and Water Booster)
Green/Yellow
Black
Compressor
Switch
#1
High Pressure
Cut-out
Switch/Junction Box (Optional)
Ground
Screw
Start
Run
Capacitor Capacitor
Black
Green
Yellow
a
d
LLC L
“A” o
Blue
Lamp 3
Black
Blue
Red
Ribbed
Lamp 2
Blue
IBC
#2
Brown
Part Number STH12 9/10
Black
Blue
IBC
#1
MODEL 44K22
179
MODEL 44M04 SCHEMATIC DIAGRAM
208-230 1 Phase
SW5
L1
L2
Export Units Only
M6
Water Booster
M7
Air Compressor
SW6
Export Units Only
SW1
PS2
IBC1
IBC2
MS
SW2
Lamp #1
R
G
Agitator
Motor
Lamp #2
M2
Carb. “A”
A
Lamp #3
M3
Carb. “B”
M4
Circ. Motor
M1
SW3
Compressor
LLCA
CR1-1
LLCB
SW4
CR1-2
R
PS1
CR1
MS
MS
Lamp #4
Low Water
Pressure
OL
Start
Relay
R
S
Compressor
Start
Cap
M5
Fan Motor
Run
Cap
Component Legend
MS
180
Relay Motor Start
SW
Switch ON/OFF
PS
Pressure Switch
CR
Control Relay
LLC
Liquid Level Control
IBC
Ice Bank Control
M
Motor
TS
Terminal Switch
Part Number STH12 9/10
I.B.C.
Warning Lamp
(optional)
Brown
Brown
Brown
Brown
High Pressure
Cut-out
Agitator
Motor
Brown
Back up
Ice
Bank
Control
(optional)
Brn
Primary
Ice
Bank
Control
Tank
B
Black
Red
Grn
Blk
Blu
Brown
Blk
Blk
Blk
Wht
Wht
Wht
White
Brown
Brown
Terminal
Block
Contactor
Blk
White
White
Brown
Brown
Black
Black
Brn
Brn
Tank
A
Red
White
Blk
Blk
Black
L.L.C
“A”
Blue
Brown
Brown
Blue
Blue
Brown
White
L.L.C
“B”
Carbonator
Pump
“B”
Circulating
Pump
“B”
Carbonator
Pump
“A”
Circulating
Pump
“A”
Brown
Brown
Brown
Blk
Brown
Blk
Brown
Brown
Black
Black
Black
Black
Fan
Motor
Circ.
Switch
B
Carb.
Switch
B
Circ.
Switch
A
Carb.
Switch
A
Agitator
Switch
Brn
Red
Start
Run
Brn
Compressor
Single Phase Units Only
Brown
Note:
Red wire from contactor to 2 x 4 box and Red wire
from contactor to compressor are not used on single
phase units.
Brown
Black
Compressor
Brn
Blue
Blk
Brown
Brn
Blk
Red
Red
Grn/Yel
Red
2 x 4 Box
Brown
Part Number STH12 9/10
Black
Black
Red
Grn
MODEL 50H
181
Black
Red
Green
MODEL 50M04
120-208/240 60Hz 3 Phase
L1
L3
L2
L4
M1
SW #1
Agitator
Agitator Motor
M2
SW #2
Carb “A”
LLC “A”
Carb Motor “A”
SW #3
Carb “B”
LLC “B”
Carb Motor “B”
M3
Time Delay
Relay
PS-1
Lamp 1
M4
SW #4
Circ “A”
Circ Motor “A”
SW #5
Circ “B”
Circ Motor “B”
M5
CR
SW #6
Refrig
CR
PS-2 IBC “1”
IBC “2”
Control Relay
CR
CR
Lamp 2
M
M
Fan Motor “1” Fan Motor “2”
Compressor
Component Legend
MS
182
Relay Motor Start
SW
Switch ON/OFF
PS
Pressure Switch
CR
Control Relay
LLC
Liquid Level Control
IBC
Ice Bank Control
M
Motor
TS
Terminal Switch
Part Number STH12 9/10
Splice
Blk
Blk
Wht
Blk
Grn/Yel
(Optional use) CO2
Light
OFF-ON
Switch
Blk
Wht
Blk
Red
White
White
S
Red
Blu
Key Board
Blk
Soda Switch
Grn/Yel
Wht
J15
C
o
n
t
r
o
l
W
Wht
Blk
S
Wht
Blk
W
S
J16
W
Blk
Brn
Red
Org
Yel
Grn
Blu
Vio
Gry
Wht
LD4
S
Wht
Blk
LD3
Blk
LD2
LD5
W
J17
S
Wht
Blk
Wht
Blk
t
Wh
t
Wh
Blk
Wht
Wht
Red
Blk
LD1
Red
Part Number STH12 9/10
Blk
W
LD6
S
Red
Blu
24 VAC
W
Blk
Blk
Brn
Red
Org
Yel
Grn
Blu
Vio
Gry
Wht
Blk
Wht
J20
Red
Water Switch
Grn/Yel
Blk
FRONT DRAW TOWER WIRING DIAGRAM
183
Grn/Yel
Soda SW.
Blk
Blu
Red
184
W
W
W
W
S
W
W
Blk
S
Red
S
Rear Keyboard - Rear View
S
S
S
Front Keyboard - Rear View
Blu
Red
Blk
Grn/Yel
Blk
24 VAC
CO2 Pressure SW
On Refrig. Unit
Low
CO2 Lamp
Water SW.
Wht
OFF-ON SW
Low
CO2 Lamp
Ref. Conduit
24 VAC
PASS-THROUGH TOWER WIRING DIAGRAM
Part Number STH12 9/10
Blk
Brn
Part Number STH12 9/10
Blu
Brn
Blk
Wht
Junction Box
ON/OFF
Brn
Circulator/
Carbonator
Blu
ON/OFF
Brn
Refrigeration
Ribbed
Brn
Agitator
Motor
Brn
Load
Blk
Blu
Brn
Blu
Brn
Grn
Ice Bank
Control
Circulator
Motor
Carbonator
Motor
Red
Water Cooled
Only
Liquid Level
Control
Pressure
Switch
Carbonator
Tank
Blu
Brn
Start
Capacitor
Compressor
Fan Motor
(Air Cooled Only)
RIB
O/L
Soda Wiring Diagrams
MODEL 2803 (120V 60 HZ)
185
Term
Block
Blu
Brn
Brn
Blu
Brn
Refrig
ON/OFF
Circulator/
Carbonator
ON/OFF
Brn
Grn
Blk
Brn
Blu
Brn
Ribbed
Junction Box
Ground in
Electrical Box
Load
Blu
Brn
Blu
Brn
Liquid Level
Control
Blk
Red
Blu
Brn
Circulator
Motor
Carbonator
Carbonator Tank
Motor
Ice Bank
Control
Grn
Pressure Switch
(Water Cooled Only)
Agitator
Motor
Start
Capacitor
Fan Motor
(Air Cooled Only)
O/L
Yel
Compressor
Blk
186
Ribbed
Brn
Red
Blu
MODEL 2803 (230V 60 HZ)
Part Number STH12 9/10
Part Number STH12 9/10
Term
Block
Brn
Grn
Blu
ON/OFF
Circulator/
Carbonator
Brn
ON/OFF
Refrig
Brn
Brn
Blu
Brn
Ribbed
Blu
Blk
Junction Box
Load
Agitator
Motor
Blu
Brn
Blu
Brn
Liquid Level
Control
Blk
Red
Pressure Switch
(Water Cooled Only)
Circulator
Motor
Carbonator
Motor
Grn
Ice Bank
Control
Blu
Brn
Fan Motor
(Air Cooled Only)
Carbonator
Tank
Start
Capacitor
O/L
Compressor
Ribbed
Ground in Electrical Box
MODEL 2803 INTERNATIONAL (230V 50 HZ)
187
Blk
MODEL 2803 ELECTRONIC IBC
188
Part Number STH12 9/10
MODEL 11
Carbonator
Motor
Carbonator
Motor
Blu
Blu
Agitator
Motor
Ribbed
Blk
I.B.C.
Brn
Brn
Grn
Red
Blk
Load
LCC
Brn
Grn
Red
Blk
Brn
Blu
Brn
Brn
Carbonator
Tank
Refrigeration
Unit
O/L
Fan
Motor
Blk
Compressor
Relay
Ribbed
Red
Junction
Box
Brn
Brn
Yel
Wht
Circulator
Motor
Brn
Brn
Blk
Term
Export
230 VAC, 50 Hz, 1 Phase
Domestic
120 VAC, 60 Hz, 1 Phase
Blu
Blu
Carbonator
Motor
Brn
Brn
Brn
Agitator
Motor
Red
Blk
Run
Capacitor
Part Number STH12 9/10
Red
Start
Capacitor
189
190
(130)
3
1
5
IBC-1
AGITATOR
SWITCH
SW1
(211)
4
5
1
CARB
SWITCH
SW2
RUN
CAP
(RIBBED)
AGITATOR
MOTOR
(213)
(RED)
START
CAP
R
(371)
C
COMPRESSOR
S
TS-1
CARB
A
(BLK)
(RED)
L
L
H
C
CARB
SWITCH
SW5
(GRN)
(219)
CARB
B
(BLK)
(RED)
(GRN)
SS901125 ONLY
L
L
H
C
(293)
(290)
CARB
MOTOR A
(292)
(293)
CARB
MOTOR B
CIRC
MOTOR
(292)
(L2
MODEL 11M R404A
WIRING DIAGRAM
120V/60Hz/1PH
230V/50Hz/1PH
230V/60Hz/1PH
USED ON MODELS
SS901120
SS901122
SS901139
ONLY
(374)
(291)
N
N
L
CIRCULATOR
SWITCH
SW3
(215)
(370)
N
N
L
LLC-B
LLC-A
(373)
DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
(RED)
(YEL)
(BLK)
(BLK)
2
(RED)
RELAY
CAUTION:
(SMOOTH)
(217)
SENSOR
(BLUE)
(RIBBED)
FAN
MOTOR
(BLK)
(BRN)
REFRIGERATION
SWITCH
SW4
(132)
(BRN)
O/L
(BRN)
8014273
REV 04
(L1)
& N)
MODEL 11 ELECTRONIC IBC
Part Number STH12 9/10
MODEL 42 & 44 ELECTRONIC IBC
Part Number STH12 9/10
191
MODEL 42 & 44 (WITH ERC 50 HZ)
50HZ
192
50HZ
Part Number STH12 9/10
MODEL 42 & 44 (WITH ERC 60 HZ)
60HZ
Part Number STH12 9/10
60HZ
193
MODEL 44 (120V 60 HZ)
L2
L1
SW5
Export Units only
M8
Water Booster
M7
Air Compressor
SW6
Export Units only
SW1
IBC1
PS2
IBC2
MS
SW2
Lamp #1
R
M1
LLCA
SW3
Compressor
G
M2
Agitator Motor
Lamp #2
Carb “A”
CR1-1
LLCB
A
MS
SW4
M4
CR1-2
R
PSI
CR1
MS
MS Start
Lamp #3
Carb “B”
Circ Motor
Lamp #4
Low Water
Pressure
OL
Relay
R
S
Compressor
Start
Cap
MS
Fan Motor Run Cap
Component Legend
MS
194
Relay Motor Start
SW
Switch ON/OFF
PS
Pressure Switch
CR
Control Relay
LLC
Liquid Level Control
IBC
Ice Bank Control
M
Motor
TS
Terminal Switch
Part Number STH12 9/10
Red
Wht
Blk
Grn
Blk
Ribbed
Agitator
Motor
M5
Grn
Part Number STH12 9/10
195
Lamp 1
IBC
#2
Blk
Circulator
Motor
“A”
(M2)
Brn
- Grn/Yel
- Brn
- Blu
-Remote Fan (Yel)
-Remote Fan (Yel)
Circulator
Motor
“B”
(M4)
Incoming Power
208/260 VAC
1 Phase, 2 Wire
Junction
Box
Carbonator
Motor
“B”
(M3)
IBC
#1
MS
Blk
Brn
Red
Blk
Brn
Grn
Red
Blk
G1
Grn
G2
G3
G4
A
Blk
Blk
Relay
Grn/Yel
2
Compressor
A
Grn/Yel
Start
Cap
L
o
a
d
L1 L2
Ribbed
(Air Unit Only)
PS2
Lamp 4
LCC
“B”
Fan
Motor
Blk
CR1
Grn
Red
Wht
Lamp 3
Box Assembly Start
TS1
L1 L2
o
a
d
LCC
“A” L
Lamp 2
Brn
Blk
Red
Note: wires must be
routed through
separate bushing,
High Pressure
Cut-out
PS1
Circulator
SW#4
Carbonator
SW#3
Agitator
SW#2
Compressor
SW#1
MODEL 44 (230V 60 HZ)
MODEL 50 (50 HZ)
Models
50MAX04 TS905053-353
50HZ
50MRX04 TS905054-353
50MWX04 TS905055-353
Caution: Disconnect power before working on
electrical circuitry.
See Serial Plate for Voltage
Shown in the OFF Position
50HZ
Power Supply Block
Terminal Strip
Contactor
Air
Option
Fan
Motor
Remote
Cond
Fan
Motor
(Black)
(Black)
RMT Only
Liquid Line
Solenoid
Refrigeration
Agitator
Switch
IBC
Contactor Coil
HPCO
AGT
Motor
Low Water
Pressure Relay Coil
Low Water Pressure
Switch
(Grn)
Load
(Red)
(Blk)
Carb A
Motor
LLC
Tank
A
LWPR
Carb Motor A
Switch
Circ Motor A
Switch
Circ A
Motor
(Grn)
Load
(Red)
(Blk)
Carb B
Motor
LLC
Tank
B
Circ B
Motor
LWPR
Carb Motor B
Switch
Circ Motor B
Switch
196
Part Number STH12 9/10
MODEL 50 (60 HZ)
Models
50MA04 TS905050-363
50MR04 TS905051-363
50MW04 TS905052-363
50MR04Q/T TS905046-263
60HZ
60HZ
Caution: Disconnect power before working on
electrical circuitry.
Shown in the OFF Position
See Serial Plate for Voltage
Air Option
Contactor
Fan
Motor
Fan
Motor
Remote
Cond
(Black)
(Black)
RMT Only
Liquid Line
Solenoid
Refrigeration
Agitator
Switch
IBC
Sensor
Contactor Coil
HPCO
AGT
Motor
Low Water
Pressure Relay
Coil
Low Water
Pressure Switch
(Grn)
(Red)
Load
(Blk)
Carb A
Motor
LLC A
Tank
A
LWPR
Carb Motor A
Switch
Circ Motor A
Switch
Circ A
Motor
(Grn)
(Red)
Load
(Blk)
Carb B
Motor
LLC B
Tank
B
Circ B
Motor
LWPR
Carb Motor B
Switch
Circ Motor B
Switch
Part Number STH12 9/10
197
MODEL 50 (WITH ERC 50 HZ)
Models
50HZ
50HZ
Caution: Disconnect power before working on
electrical circuitry.
Shown in the OFF Position
See Serial Plate for Voltage
Power Supply Block
Terminal Strip
Jumper
Air
Option
Contactor
Fan
Motor
Remote
Cond
Fan
Motor
(Black)
(Black)
RMT Only
Liquid Line
Solenoid
Contactor Coil
AGT
Motor
C
R
Agitator
Carb
A
Carb
A
Carb A
Carb A
Circ
A
Circ A
Circ
B
Circ B
P/N 0705-101
L L/N Earth
198
Ice Probe
Carb A Probe
Carb B Probe
Water Pressure
Suction Temp
Discharge Temp
Waterbath Temp
Circ B Temp
Circ A Temp
Level Probe
HPCO
P/N 020001986
CO2 Pressure
P/N 020001985
Part Number STH12 9/10
MODEL 50 (WITH ERC 60 HZ)
Models
60HZ
60HZ
Caution: Disconnect power before working on
electrical circuitry.
See Serial Plate for Voltage
Shown in the OFF Position
Air Option
Contactor
Fan
Motor
Remote
Cond
Fan
Motor
(Black)
(Black)
RMT Only
Liquid Line
Solenoid
Contactor Coil
AGT
Motor
C
R
Agitator
Carb
A
Carb
A
Carb A
Carb A
Circ
A
Circ A
Circ
B
Circ B
P/N 0705-101
L L/N Earth
Part Number STH12 9/10
Ice Probe
Carb A Probe
Carb B Probe
Suction Temp
Discharge Temp
Waterbath Temp
Circ B Temp
Circ A Temp
Level Probe
Water Pressure
HPCO
P/N 020001986
CO2 Pressure
P/N 020001985
199
Super-Chil Wiring Diagrams
MODEL SC180 (120 VAC)
L1
L2
SW4
Optional
Circulator
Motor
M
SW1
PS
IBC
MS
SW2
M1
Start Relay
MS
MS
Agitator
Motor
M5
Fan
OL
R
S
Compressor
Run Cap
Start Cap
Component Legend
200
L1
Line 1
L2
Neutral
M
Motor
MS
Contactor
PS
Pressure Switch
IBC
Ice Bank Control
Part Number STH12 9/10
MODEL SC180 ELECTRONIC IBC
Part Number STH12 9/10
201
MODEL SC340 (120 VAC)
L1
L2
SW4
Optional
Circulator
Motor
M
M1
SW1
Fan
Compressor
IBC
O/L
Start
SW2
M2
Agitator
Motor
Component Legend
202
L1
Line 1
L2
Neutral
M
Motor
MS
Contactor
PS
Pressure Switch
IBC
Ice Bank Control
Part Number STH12 9/10
MODEL SC340 (120 VAC)
Part Number STH12 9/10
203
MODEL SC900 & SC1000
204
Part Number STH12 9/10
MODEL SC1000 (230 VAC)
L1
L2
Agitator
Motor
M1
SW1
IBC
Compressor
O/L
Start
M2
120 Volt, 60 Hz, 1 Phase Domestic
230 Volt, 50 Hz, 1 Phase Export
Fan
Component Legend
L1
Line 1
L2
Neutral
M
Motor
MS
Contactor
PS
Pressure Switch
IBC
Ice Bank Control
Part Number STH12 9/10
205
MODEL SC1000 ELECTRONIC IBC
206
Part Number STH12 9/10
MODEL SC1000 (WITH ERC 50 HZ)
50HZ
Part Number STH12 9/10
50HZ
207
MODEL SC1000 (WITH ERC 60 HZ)
60HZ
208
60HZ
Part Number STH12 9/10
MODEL SC2000 (50 HZ)
Models
SC2000AX TS905063-353
SC2000RX TS905064-353
50HZ
50HZ
SC2000WX TS905065-353
Caution: Disconnect power before working on
electrical circuitry.
See Serial Plate for Voltage
Shown in the OFF Position
Power Supply Block
Remote
Cond
Contactor
Fan
Motor
Fan
Motor
(Black)
(Black)
Air Option
RMT Only
Liquid Line
Solenoid
Refrigeration
Agitator
Switch
Contactor Coil
IBC
Sensor
HPCO
Agt
Motor
Circ Motor A
Switch
Circ
Motor A
Optional
Terminal
Strip
Part Number STH12 9/10
209
MODEL SC2000 (60 HZ)
60HZ
Models
SC2000A TS905060-363
SC2000R TS905061-363
SC2000W TS905062-363
Caution: Disconnect power before working on
electrical circuitry.
See Serial Plate for Voltage
60HZ
Shown in the OFF Position
Air Option
Contactor
Fan
Motor
Remote
Cond
Fan
Motor
(Black)
(Black)
RMT Only
Liquid Line
Solenoid
Refrigeration
Agitator
Switch
Contactor Coil
IBC
Sensor
HPCO
Agt
Motor
Circ Motor A
Switch
Circ
Motor A
Optional
210
Terminal
Strip
Part Number STH12 9/10
Splice
Blk
Blk
Wht
Blk
Grn/Yel
(Optional use) CO2
Light
OFF-ON
Switch
Blk
Wht
Blk
Red
White
White
S
Red
Blu
Key Board
Blk
Soda Switch
Grn/Yel
Wht
J15
C
o
n
t
r
o
l
W
Wht
Blk
S
Wht
Blk
W
S
J16
W
Blk
Brn
Red
Org
Yel
Grn
Blu
Vio
Gry
Wht
LD4
S
Wht
Blk
LD3
Blk
LD2
LD5
W
J17
S
Wht
Blk
Wht
Blk
t
Wh
t
Wh
Blk
Wht
Wht
Red
Blk
LD1
Red
Part Number STH12 9/10
Blk
W
LD6
S
Red
Blu
24 VAC
W
Blk
Blk
Brn
Red
Org
Yel
Grn
Blu
Vio
Gry
Wht
Blk
Wht
J20
Red
Water Switch
Grn/Yel
Blk
WIRING DIAGRAM FRONT DRAW TOWER
211
212
Refrigeration Unit
6
5
4
3
2
1
Syrup BIB
Carbonator
Tank
Circulating
Water Coil
Circulating
Water Pump
1 2 3 4 5 6
Dispensing Tower
Syrup
Coil
From
Syrup
Tanks
To
Tower
3/8" Barb x
3/8" Tube
3/8" Barb x
3/8" Tube
Circuit Schematics
PLUMBING CIRCUIT DIAGRAMS — MODEL 2803
Part Number STH12 9/10
PLUMBING CIRCUIT DIAGRAMS — MODEL 11M
ROOT BEER
Single Tower Plumbing
Installation Kit
(020001441)
020001403
Pressurized
Filtered
Water Supply
00861302
Primary
Carb
Pump
Carb
Tank
Circ
Pump
Part Number STH12 9/10
213
Model 11M Root Beer Dual Tower Plumbing
Installation Kit
(020001441)
020001403
00861302
Tee Kit
(020001411)
Pressurized
Filtered
Water
Supply
Primary
Carb
Pump
Carb
Tank
Circ
Pump
214
Part Number STH12 9/10
Model 11M Root Beer Three Tower Plumbing
Installation Kit
(020001441)
020001403
00861302
Tee Kit
(020001411)
Tee Kit
(020001411)
Primary
Carb
Pump
Carb
Tank
Circ
Pump
Part Number STH12 9/10
Pressurized
Filtered
Water
Supply
215
216
To Ice
Machine
To Coffee
Machine
Legend
Accumulator
Tank
(optional)
Phosphate
Feeder
(optional)
— Check Valve, Ball
— Type
— Check Valve,
— Vent to Atmosphere
— Pressure Relief Valve
— 3-way Ball Valve
— Electric Solenoid
— Valve
— Manual Ball Valve
Fine Filters
(optional)
Optional Pressure
Regulator
(55 psi [3.8 bar])
High
Pressure
Switch
H
Booster
Tank
Cooling
Coil
Booster Module
Replacement Line Coarse Filter
(optional)
Low
Pressure
Gauge
Tower
Tower
Tower
Primary
Water Supply
To Optional
Water Cooled
Condenser
Cooling
Coil
Cooling
Coil
Optional Constant Water
Pressure Booster Module
Carbonator
Tank
Circulator
Pump
High
Pressure Constant Pressure
Booster Pump
Gauge
Low
Pump
Pressure
Switch
L
To
Plain Water
Valve
Primary
Carbonator
Filtered Water
Pressure Gauge
PLUMBING CIRCUIT DIAGRAMS — MODEL 44M
Pressurized Water Circuit Diagram
Part Number STH12 9/10
Pre-mix Plumbing — Six Valve Towers with
Connection at Center Island
NOTE: Other plumbing configurations are possible.
Check tower installation manual before making
connections.
Single Tower System
Drive-thru or
Center Island Tower
6
A
5
A
4
A
3
A
2
A
6
5
4
3
2
1
6
5
4
3
2
1
1
W
Syrup Cooling
Coils
Syrup Filters
(#2 through #11
optional)
6
5
4
3
2
1
6
5
4
3
2
1
Syrup Tanks
Part Number STH12 9/10
217
Two Tower System
with Connection at Center Island
Self Serve or
Center Island Tower
6
A
5
A
4
A
3
A
2
A
6
5
4
3
2
1
6
5
4
3
2
1
1
W
Drive-thru Tower
6
A
6
5
A
5
4
A
4
3
3
A
2
2
A
1
W
1
Syrup Cooling
Coils
Syrup Filters
(#2 through #11
optional)
6
5
4
3
2
1
6
5
4
3
2
1
Syrup Tanks
218
Part Number STH12 9/10
Three Tower System
with Connection at Center Island
Optional
Self Serve Tower
6
A
6
5
A
5
4
A
4
3
3
A
2
2
A
1
1
W
Self Serve Tower
6
A
5
A
4
A
3
A
2
A
6
5
4
3
2
1
6
5
4
3
2
1
1
W
Drive-thru Tower
6
A
6
5
A
5
4
A
4
3
3
A
2
2
A
1
W
1
Syrup Cooling
Coils
Syrup Filters
(#2 through #11
optional)
6
5
4
3
2
1
6
5
4
3
2
1
Syrup Tanks
Part Number STH12 9/10
219
Pre-mix Plumbing — Eight Valve Towers with
Connection at Center Island
Single Tower System
Drive-thru or
Center Island Tower
8
A
6
A
7
A
5
A
4
A
3
A
2
A
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
1
W
Syrup Cooling
Coils
Syrup Filters
(#2 through #11
optional)
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
Syrup Tanks
220
Part Number STH12 9/10
Two Tower System
with Connection at Center Island
Self Serve or
Center Island Tower
Drive-thru Tower
8
A
7
A
6
A
5
A
4
A
3
A
2
A
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
1
W
8
A
7
A
8
6
A
7
6
5
A
5
4
A
4
3
3
A
2
2
A
1
W
1
Syrup Cooling
Coils
Syrup Filters
(#2 through #11
optional)
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
Syrup Tanks
Part Number STH12 9/10
221
Three Tower System
with Connection at Center Island
Self Serve or Center
Island Tower
Self Serve or
Center Island Tower
8
A
8
A
7
A
8
6
A
7
6
5
A
5
4
A
4
3
3
A
2
2
A
1
1
W
7
A
6
A
5
A
4
A
3
A
2
A
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
1
W
Drive-thru Tower
8
A
7
A
8
6
A
7
6
5
A
5
4
A
4
3
3
A
2
2
A
1
W
1
Syrup Cooling
Coils
Syrup Filters
(#2 through #11
optional)
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
Syrup Tanks
222
Part Number STH12 9/10
Carbonated Water Plumbing — Six Valve Towers
with Connection at Unit
Supplies Carbonated Water to Diet Drink and Provides
Conduit Cooling for Products
Single Tower System with Connection at Unit
Drive-thru or
Center Island Tower
6
A
5
A
4
A
3
A
2
A
1
W
8
9
W
8
9
W
Primary
Carbonator
Pump
Carbonator
Tank
Water
Feeder
Part Number STH12 9/10
Pressurized
Filtered
Water Supply
Circulator
Pump
223
Two Tower System with Connection at Unit
Self Serve or
Center Island Tower
6
A
5
A
4
A
3
A
2
A
Drive-thru Tower
6
A
1
W
8
9
W
8
9
W
8
Primary
Carbonator
Pump
Carbonator
Tank
Water
Feeder
224
5
A
9
4
A
3
A
2
A
1
W
W
Pressurized
Filtered
Water Supply
Circulator
Pump
Part Number STH12 9/10
Three Tower System with Connection at Unit
Self Serve or
Center Island
Self Serve or
Tower (optional)
Drive-thru Tower
Center Island Tower
6
A
5
A
4
A
3
A
2
A
1
W
8
9
8
9
6
A
W
8
9
5
A
4
A
3
A
6
A
1
W
5
A
W
8
W
Pressurized
Filtered
Water Supply
Primary
Carbonator
Pump
Carbonator
Tank
Water
Feeder
2
A
Circulator
Pump
9
4
A
3
A
2
A
1
W
W
Carbonated Water
Circuit
Legend (Water)
Plain Water
Carbonated Water
Part Number STH12 9/10
225
Carbonated Water Plumbing — Eight Valve Towers
with Connection at Unit
Single Tower System with Connection at Unit
Drive-thru or
Center Island Tower
8
A
7
A
6
A
5
A
4
A
3
A
2
A
1
W
8
9
W
8
9
W
Primary
Carbonator
Pump
Carbonator
Tank
Water
Feeder
226
Pressurized
Filtered
Water Supply
Circulator
Pump
Part Number STH12 9/10
Two Tower System with Connection at Unit
Self Serve or
Center Island Tower
8
A
7
A
6
A
5
A
4
A
3
A
Drive-thru Tower
2
A
1
W
8
9
W
8
9
W
Primary
Carbonator
Pump
Carbonator
Tank
Water
Feeder
Part Number STH12 9/10
8
A
7
A
6
A
8
9
W
5
A
4
A
3
A
2
A
1
W
Pressurized
Filtered
Water Supply
Circulator
Pump
227
Three Tower System with Connection at Unit
Self Serve or
Center Island
Self Serve or
Tower (optional) Center Island Tower
Drive-thru Tower
8
A
7
A
6
A
5
A
4
A
3
A
2
A
1
W
8
9
W
8
8
9
W
Primary
Carbonator
Pump
Carbonator
Tank
Water
Feeder
8
A
7
A
6
A
5
A
9
4
A
3
A
2
A
1
W
8
A
7
A
6
A
5
A
W
Circulator
Pump
4
A
3
A
2
A
1
W
8
9
W
Pressurized
Filtered
Water Supply
Carbonated Water
Circuit
Legend (Water)
Plain Water
Carbonated Water
228
Part Number STH12 9/10
Legend
Part Number STH12 9/10
To Ice
Machine
To Coffee
Machine
Phosphate
Feeder
Cooling Coil
Fine Filters
High
Pressure
Switch
H
Booster
Tank
Cooling Coil
To Water Cooled
Booster Module Coarse
Condenser
Replacement Line Filter
By-pass (Export only)
Low Pressure
Gauge
L
Cooling Coil
Carbonator Tank “B” Cooling Coil
Circulator
Pump “B”
Pump
Carbonator Tank “A”
Circulator
Pump “A”
Pump
To Danish Steamer
To Filet Bun Steamer
Syrup Tray Wash
Constant Pressure
High
Booster Pump
Pressure
Gauge
Low
Pump
Pressure
Switch
Carbonator
Pump “B”
Cooling Coil
To Plain
Water Valve
Pump
Low
Pressure
Switch
L
Pump
Carbonator
Pump “A”
Low Pressure
Regulator
Filtered Water
Pressure Gauge
By-pass (Export only)
Optional Pressure Regulator Set
at 55 psi (3.8 bar)
Required with Booster Module
Accumulator
Tank
— Pressure Relief
— Valve
— Check Valve,
— Ball Type
— Check Valve,
— Vent to Atmosphere
— 3-way Ball Valve
— Electric Solenoid
— Valve
— Manual Ball Valve
Primary
Water Supply
Optional Constant Water
Pressure Booster Module
Dispensing
Tower
Dispensing Tower
Dispensing
Tower
PLUMBING CIRCUIT DIAGRAMS — MODEL 50M
Pressurized Water Circuit Diagram
229
230
Optional
CO2 Tank Optional Bulk
“B” CO2 Tank Set at
90-100 psi (6.2-6.9 bar)
Shake
Machine
A
CO2 Shut-off to
Carbonator Tank
Shake Machine
Shut-off Valve
Carbonator
Tank “B”
— Connection for
— Manual 3-way Ball
— Check Valve, Ball
— Manual Shut-off Valve
Legend
Carbonator
Tank “A”
Sugar Base Lines & Disconnects
Sugar Free Line & Disconnect
Low Pressure
Regulator
Set at 15 psi
(1 bar)
Medium Pressure Regulator
Set at 60 psi (4.1 bar)
B
Optional
CO2 Change-over Valve
Optional
Air/CO2
Changeover
Valve
Sugar Base Lines & Disconnects
Optional
Air Compressor Pressure Switch
“ON” = 70 psi (4.8 bar)
“OFF” = 90 psi (6.2 bar)
Optional
CO2 Tank
“A”
Optional CO2 Regulators
Set at 90-100 psi
(6.2-6.9 bar)
CO2 Gas and Compressed Air Circuit Diagram
Part Number STH12 9/10
Ice/Beverage Units Diagrams
SERVEND RECOMMENDED PLUMBING
S-250M Plumbing Diagram
1
2
3
4
Left Flex
Manifold
5
6
7
8
Right Flex
Manifold
Manifold: Change to carbonated or non-carbonated
water.
1. Rotate plunger 180° using a 5/32" Allen wrench.
2. Pull plunger out to get non-carbonated water.
3. Push plunger in to get carbonated water.
4. Turn plunger back 180° to lock.
Part Number STH12 9/10
231
Right Flex
Manifold
Not in Use
Left Flex
Manifold
Not in Use
MII-250 Plumbing Diagram
Manifold: Change to carbonated or non-carbonated
water.
1. Rotate plunger 180° using a 5/32" Allen wrench.
2. Pull plunger out to get non-carbonated water.
3. Push plunger in to get carbonated water.
4. Turn plunger back 180° to lock.
232
Part Number STH12 9/10
MII-302 Plumbing Diagram
Left Flex
Manifold
Right Flex
Manifold
Manifold: Change to carbonated or non-carbonated
water (S2-SII only).
1. Rotate plunger 180° using a 5/32" Allen wrench.
2. Pull plunger out to get non-carbonated water.
3. Push plunger in to get carbonated water.
4. Turn plunger back 180° to lock.
For assistance call (812) 246-7000
Part Number STH12 9/10
233
This Page Intentionally Left Blank
234
Part Number STH12 9/10
Manitowoc Foodservice
2100 Future Drive
Sellersburg, IN 47172, USA
Ph: 812-246-7000 Fax: 812-246-7024
Visit us online at: www.manitowocfsg.com
© 2010 Manitowoc
Part Number STH12 9/10
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