Cornelius WM600 Operating instructions

Installation/Owner’s Manual
ICE MAKER
(WM600 AND CM600)
IMPORTANT:
TO THE INSTALLER.
It is the responsibility of the Installer to
ensure that the water supply to the Ice
Maker is provided with protection against
backflow by an air gap as defined in
ANSI/ASME A112. 1.2-1979; or an approved
vacuum breaker or other such method as
proved effective by test.
Water pipe connections and fixtures
directly connected to a potable water
supply shall be sized, installed, and
maintained according to Federal, State,
and Local laws.
PRINTED IN U.S.A
IMI CORNELIUS INC; 1998–2003
IMI CORNELIUS INC gOne Cornelius Place gAnoka, MN 55303-6234
Telephone [phone] Facsimile [phone]
Part No. 630460082
March 3, 2003
Revision: B
THIS DOCUMENT CONTAINS IMPORTANT INFORMATION
This Manual must be read and understood before installing or operating this equipment

i630460082
TABLE OF CONTENTS
Page
SPECIIFICATIONS 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DESCRIPTION 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSTALLATION INSTRUCTIONS 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REMOVE ICE MAKER FROM CARTON: 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CABINET REMOVAL 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PREPARATION OF INSTALLATION SITE 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WATER INLET HOOK–UP: 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRICAL SUPPLY 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AUGER ENGAGEMENT 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INITIAL START UP, CHECKS AND ADJUSTMENT INSTRUCTIONS 5. . . . . . . . .
GUIDE TO SERVICE 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ICE MAKER CLEANING AND SANITIZING PROCEDURES 6. . . . . . . . . . . . . . . . .
MAINTENANCE 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MONTHLY 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
QUARTERLY 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SEMI-ANNUALLY 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WATER LEVEL CONTROL 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WATER LEVEL CONTROL OPERATION 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PURPOSE OF WATER LEVEL CONTROL 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TO REPLACE WATER LEVEL CONTROL 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TO REPLACE WATER LEVEL SAFETY SWITCH 8. . . . . . . . . . . . . . . . . . . . . . . . .
ICE LEVEL CONTROL 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REFRIGERATION SYSTEMS 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REFRIGERATION SYSTEM ADJUSTMENTS 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EXPANSION VALVE 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADJUSTMENT AND TROUBLESHOOTING 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADJUSTMENT AND TROUBLESHOOTING 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TEMPERATURE/PRESSURE CHART 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CONDENSER MODULATING VALVE (WATER COOLED ONLY) 10. . . . . . . . . . . .
CONDENSER MODULATING VALVE REMOVAL 11. . . . . . . . . . . . . . . . . . . . . . . . . .
GEAR MOTOR 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING GEAR MOTORS 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THE GEARMOTOR WILL NOT RUN 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THE GEARMOTOR STARTS BUTS TRIPS REPEATEDLY ON THE
OVERLOAD PROTECTOR 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THE MOTOR RUNS BUT OUTPUT SHAFT DOES NOT ROTATE 13. . . . . . . . . . . .
OVERLOAD CHECK: 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MOTOR CHECK: 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSTALLATION AND SHAFT SEAL REPLACEMENT 14. . . . . . . . . . . . . . . . . . . . . . .
AUGER & EXTRUDING HEAD REMOVAL 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TO REPLACE BEARINGS 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING COMPRESSOR 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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TABLE OF CONTENTS (cont’d)
Page
ELECTRICAL CHECKOUT 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OVERLOAD CHECK 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMPRESSOR CHECK 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CAPACITOR CHECK 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SAFETY CONTROLS 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GUIDE TO GOOD ICE 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING CHART –ICEMAKER NOT OPERATING 19. . . . . . . . . . . . . . . .
WARRANTY 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LIST OF FIGURES
FIGURE 2. AUGER ASSEMBLY 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 3. ADJUSTMENT SCREW 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 4. OUTPUT SHAFT 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 5. SHAFT SEAL REPLACEMENT 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 6. EXTRUDING HEAD 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 7. AUGER 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 8. UPPER NUT AND BEARING 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 9. ELECTRICAL BOX 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 10. GEAR MOTOR THERMAL OVERLOAD 17. . . . . . . . . . . . . . . . . . . . . . .
FIGURE 11. TROUBLESHOOTING CHART 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 14. MOUNTING TEMPLATE 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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SAFETY INFORMATION
Recognize Safety Information
This is the safety-alert symbol. When you see this
symbol on our machine or in this manual, be alert to
the potentially of personal injury.
Follow recommended precautions and safe operating
practices.
DANGER
Understand Signal Words
A signal word - DANGER, WARNING, OR CAUTION
is used with the safety-alert symbol. DANGER identi-
fies the most serious hazards.
Safety signs with signal word DANGER or WARNING
are typically near specific hazards. WARNING
General precautions are listed on CAUTION safety
signs. CAUTION also calls attention to safety mes-
sages in this manual. CAUTION
Follow Safety Instructions
Carefully read all safety messages in this manual and on your machine safety signs. Keep safety signs in
good condition. Replace missing or damaged safety signs. Learn how to operate the machine and how to
use the controls properly. Do not let anyone operate the machine without instructions. Keep your machine in
proper working condition. Unauthorized modifications to the machine may impair function and/or safety and
affect the machine life.
CAUTION: Very high discharges pressure is present in system. Quick disconnects on your
gages will minimize danger and loss of refrigerant.
CAUTION: Unit requires separate electrical line. See instruction manual for proper fuse
size.
WARNING: There must be adequate clearance around ice maker. Allow minimum 6”air
intake and 4”air exhaust for air exhaust and panel removal.
NOTE: Unit must be installed per local plumbing and electrical codes. See Installation manual for
unit requirements. Failure to do so may cause damage to unit, which would void unit warranty.
NOTE: Using any parts other than genuine factory manufactured parts relieves the manufacturer of all
liability.
NOTE: Manufacturer reserves the right to change specifications at any time.

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SPECIIFICATIONS
Model WM (Wall Model) 600 and CM (Counter Model) 600
Compressor 3/4 H.P. (R404 Refrigerant)
Voltage 115 VAC, 60 Hz, Single Phase
Current Draw 16 Amps
Circuit Breaker or Fuse Size 20 Amp Maximum Time Delay
DESCRIPTION
Models WM600 and CM600 Ice Makers are self-contained wall mount and counter style Units which automati-
cally make hard compressed-style ice and store it in a sealed hopper for sanitary dispensing.
INSTALLATION INSTRUCTIONS
IMPORTANT: An Everpure Model 9320–42 Systems IV Model DB900 ice maker quality water treatment
unit MUST BE INSTALLED in the water supply line to the Ice Maker. Failure to do so may result in poor
quality ice, low production output, and may cause premature failure of the Ice Maker evaporator and
void the extended evaporator warranty.
This Ice Maker is provided with a stainless–steel evaporator designed to last the life of the product.
But, some of the chemicals in treated and untreated water, specifically chlorine and sulphur (sulphide),
have the ability to attack stainless–steel and cause premature failure. An initial investment in proper
water treatment will pay for itself in increased production, quality, and long life of the product.
REMOVE ICE MAKER FROM CARTON:
1. Keep Unit in the upright position, remove carton and pallet from the Unit and inspect the unit for damage.
Upon inspection of the unit, if any damage is found, file a claim with the carrier immediately.
2. Locate the Startup Card either on the outside of the container or on the plastic liner. Fill in the proper infor-
mation and send one copy to the factory and the other copy to the Distributor. The postage is prepaid.
CABINET REMOVAL
1. Unscrew and remove the front panels for electrical and start–up access.
2. Remove shipping tape from the storage hopper cover and the agitator in storage hopper.
PREPARATION OF INSTALLATION SITE
1. For maximum efficiency and ice output, select a location for your ice maker where it will not be exposed to
sunlight, excessive heat or reflected radiation (preferably in a room with a temperature of 70°F to 80°F).
The icemaker normally will not function properly in temperatures below 65°F. The area surrounding the ice
maker should be well ventilated. (Consult Figure ???? for proper airflow clearance). WM600 –Two (2)
mounting brackets are supplied for securing the Unit to a wall.
CM600 –Consult Figure 1B and 1C for dimensions for mounting the Unit to the counter. Note that the Unit
must be level for proper operation.
2. The Unit must be sealed to the counter. Locate the desired position for the Unit, then mark the outline
dimensions on the counter.

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3. Apply a continuous bead of NSF listed silastic sealant (Dow 732 or equal) approximately 1/4–inch inside of
the Unit outline dimensions. Then, position the Unit on the counter within the outline dimensions. All excess
sealant must be wiped away immediately.
IMPORTANT: The WM600 with a full ice storage hopper weighs 450 pounds. Make sure that the
mounting surface is adequately reinforced to support this weight.
The mounting hole dimensions for the brackets are shown in Figure 1A. Use these dimensions to locate the Unit
at the desired height on the wall.
IMPORTANT: Provide support for the Unit until all eight (8)–mounting bolts are installed. Do not hang
the Unit from the top mounting angle bracket only while installing the lower angle.
WATER INLET HOOK–UP:
1. Water Inlet –The fitting is a 1/4”–in. compression fitting located at the bottom of the Unit. Connect water
supply with a 1/4–inch or larger copper or flexible tubing.
2. Water Pressure –Unless otherwise specified, the Unit is designed to operate on a water pressures be-
tween 10 P.S.I. and 90 P.S.I. (NOTE: for pressures above 90 P.S.I; a water pressure regulator must
be installed).
3. Water Cooled Condensers –The inlet uses a 3/8–inch compression fitting. Use a separate 3/8–inch or
larger water line.
4. Filter Conditioners are recommended on supply lines to the Ice Makers. Never run the water supply to
the water cooled condenser through a Filter/Conditioner. It uses up the cartridge unnecessarily and a satu-
rated cartridge can starve the Ice Maker causing premature component damage. Separate water supplies
are recommended.
WM600 –Connect a 1–1/4 inch IPS (or equal) drain line to the1–1/4 inch diameter P–trap at the lower
bottom of the Unit. The line must pitch downward to an open drain and must contain no traps or improper
drainage will result.
CM600 –Connect two (2) 3/4–inch IPS (or equal) drain lines to the 3/4–inch threaded drain connections at
the lower rear of the Unit. These lines must pitch downward to an open drain and must contain no traps or
improper drainage will result. For water–cooled Units, a third 3/4–inch FPT drain fitting is provided for the
condenser drain (see Figure 1B).
NOTE: The Unit must be installed per local plumbing codes.
ELECTRICAL SUPPLY
1. Power Access –Is provided by way of a 7/8–inch diameter hole located on the lower left side of the Unit.
Route incoming power in conduit, to the Ice Maker electrical control box. Make connections to wires pro-
vided in the control box and the ground lug/screw.
2. Fused Line –Should be a dedicated circuit checked and sized according to the electrical rating shown on
the Unit nameplate.
NOTE: The Unit must be installed per local electrical codes.
AUGER ENGAGEMENT
Be certain that the auger is fully engaged to the lower drive and that the extruding head is fully engaged to the
evaporator.

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INITIAL START UP, CHECKS AND ADJUSTMENT INSTRUCTIONS
NOTE: Do not start the Unit before completing the previous Installation steps.
Turn on the water supply and main power switch (located on top of the electrical box).
NOTE: If the Unit will not start, be sure the water reservoir is full. The low water safety control must be
properly adjusted to start and shut down the Unit. If the water level drops below the bottom of the res-
ervoir, the Unit must shut down. Adjustment is made by moving the magnet up or down.
FIGURE 1. FLOAT ADJUSTMENT
Water Level Control Adjustment –If necessary, adjust the float by bending the float arm up or down as need-
ed. Push the float assembly down until the Unit stops running. Release the float and the Unit will restart. Keep
water in the reservoir at the level line while the Unit is in operation (See Figure 1).
Low Water Safety Control –Adjust the magnet by bending the magnet arm as shown in Figure 1 to shut down
the Unit if the water level drops below the line on the side of the reservoir.
Bin Control –Remove four clips from top of the bin cover and lift cover so the bin control switch can be manu-
ally lifted until the Unit shuts down. Release the plate and unit will restart
Dispense Switch and Mechanism –By depressing the dispense switch, the dispense mechanism door on the
storage bin will open, and the agitator will rotate counterclockwise.
NOTE: If any of these checks or adjustments cannot be achieved, refer to Troubleshooting Section of
this manual or call our Technical Support Center for assistance.

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GUIDE TO SERVICE
IMPORTANT: Prventive maintenance can increase the trouble-free life of your Ice Maker. Failure to
perform preventive maintenance could void your equipment warranty.
ICE MAKER CLEANING AND SANITIZING PROCEDURES
IMPORTANT: Do not use any of the ice made during cleaning operations.
Clean and sanitize ice storage area when cleaning Ice Maker.
1. Turn Ice Maker off.
2. Shut off water supply.
3. Remove ice from storage bin.
4. Mix approved cleaner (2 gallons as directed). Recommended cleaner: Calgon Corp. or Virginia Chemicals,
ice machine cleaner. Mixture: 3–1/3 ounces per gallon water. Do not use nickel safe cleaners.
5. Turn Ice Maker on and add cleaner solution to water level control (float reservoir) until 2 gallons have been
used.
6. Turn on water supply and operate Ice Maker for 15 minutes.
7. Turn Ice Maker off. Remove and discard all ice.
8. Sanitize using household liquid bleach (50 ppm chlorine). Mixture: 1 fluid ounce per gallon room tempera-
ture water. Allow a two minute exposure time.
9. Sanitize pre–cleaned inside areas of storage bin liner, door frame, door, as well as all exposed surfaces of
the evaporator assembly and the bin shutoff assembly with sanitizing solution. Allow to air dry.
MAINTENANCE
Preventative Maintenance can increase the trouble-free life of your Ice Maker. Many Authorized IMI Service
Agencies offer service contracts. Contact your local distributor for further information.
MONTHLY
1. Clean the condenser coil. Use a brush, vacuum cleaner, or blow from inside the coil with air or CO2gas.
2. Inspect the water feed reservoir at least once a month until a definite pattern for cleaning and sanitizing
has been established.
QUARTERLY
This is the maximum period of time between cleaning and sanitizing the Ice Maker. In addition to recommended
monthly procedure, and if a more frequent cleaning and sanitizing pattern has not been established, the Ice
Maker must be cleaned and sanitized quarterly.
SEMI-ANNUALLY
Semi-annually, in addition to all previously established service procedures, perform the following:
1. Check for water leaks; tube connections, water fittings, and the lower icemaker water seal.

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2. Check the drain tubes for clogs and ”aged”tubes. Replace if tubes are stained or brittle.
FIGURE 2. AUGER ASSEMBLY
3. Check for signs of condensation. Clean where necessary and replace insulation properly.
4. Check safety circuits for proper operation.
5. Check refrigeration system (see REFRIGERATION SYSTEMS section of this manual).
6. Check Unit for abnormal noise. Tighten machine and cabinet screws, if necessary.
7. Check white upper bearings on auger assembly (see Figure 2). If bearing are less than 1/16-inch thick,
replace the bearings.
WATER LEVEL CONTROL
WATER LEVEL CONTROL OPERATION
When water is introduced through the inlet fitting, the float rises (see Figure 1). The float pushes against a lever
that in turn, forces the poppet assembly against the inlet fitting valve seat that seals the water off. Before the
water inlet is sealed, the safety switch is operated. In the event of a water failure, the float would drop down and
operate the safety switch to shut off the Unit.
If water level control will not shut off and seal at level as indicated, be sure inlet pressure does not exceed rec-
ommended factory operating range.
Under ordinary circumstances, the water level control adjustment should not be necessary providing the control
was properly adjusted when the Unit was installed or relocated (see “Water Level Control Adjustment ”in
“INSTALLATION INSTRUCTIONS”SECTION of this manual). If however, the water level control becomes inop-
erative, repair or replace the control.
PURPOSE OF WATER LEVEL CONTROL
1. To automatically maintain the proper water level in the evaporator when the Unit is operating and making
ice.
2. A safety switch is operated in the event of an interruption in the water supply.The switch shuts off the elec-
trical power to the Ice Maker and it’s refrigeration system. The switch will reset as soon as the cause of
the water failure has been corrected and the proper water level in the Ice Maker has again been reached.
3. The transparent bowl not only provides a visible check of the water level, but also is a good guide to the
internal conditions which exist within the Ice Maker assembly itself (see cleaning procedure).

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TO REPLACE WATER LEVEL CONTROL
1. Shut off the water supply. Shut off the main power switch or unplug the Ice Maker from electrical outlet.
2. Remove flexible tubing from bottom of the water level control, then drain water from the water level control
and evaporator.
3. Remove flexible tubing at bottom of the water level bowl connected to the overflow.
4. Hold water inlet fitting with proper tool to prevent it from rotating when disconnecting the water inlet.
5. Remove wing nut holding the water control to its mounting bracket. The control can be removed by lifting it
straight up.
TO REPLACE WATER LEVEL SAFETY SWITCH
1. Shut off main power switch or unplug the Ice Maker from electrical outlet.
2. Unplug Molex connector connecting switch to the electrical box.
3. Remove two screws anchoring the water level safety switch to the bottom of the water level control mount-
ing bracket.
ICE LEVEL CONTROL
The ice level control assembly is secured to the top of the ice storage container cover. When the switch
assembly is down, due to lack of ice in the ice storage container, an electrical impulse is sent to the compressor
to start the ice making cycle. As ice level increases in the ice storage container, the switch assembly is pushed
back. When the ice storage container is full, it de-actuates the switch which stops the compressor and the ice
making cycle.

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REFRIGERATION SYSTEMS
REFRIGERATION SYSTEM ADJUSTMENTS
A complete understanding of the Ice Maker and the hermetic refrigeration system is necessary before any
adjustments are made. The refrigeration technician must use high and low side pressure readings, water and air
temperatures, plus general conditions of cleanliness to assess the refrigeration system status when making any
adjustments.
All Ice Maker products are tested and adjusted at the factory prior to shipment where the ambient temperature
ranges from 65°F to 90°F, depending on the season of the year.
Whenever a new Ice Maker is initially installed and started, it is imperative that the start-up operator make the
following checks and readjustments for local conditions.
EXPANSION VALVE
You will find a thermal expansion valve on IMI Ice Makers, which is used to control the amount of refrigerant
flowing through the evaporator. Improperly installed or defective expansion valves may cause low production,
soft ice, squeaking from evaporator, and excessive load inside the evaporator.
By using the general refrigeration trouble shooting along with the pressure charts, you can easily determine
whether or not the expansion valve is working properly.
ADJUSTMENT AND TROUBLESHOOTING
ADJUSTMENT AND TROUBLESHOOTING
When troubleshooting the expansion valve, you must:
1. Be sure you have adequate water flowing into the evaporator, a clean and properly ventilated condenser,
and the system is properly charged and free of any restrictions. Also be sure compressor is operating prop-
erly.
2. Take reservoir water temperature and air temperature from the condenser inlet and determine at what
pressure the Ice Maker should be operating. On Ice Makers equipped with a thermostatic valve, there is
NO adjustment. If the correct pressure cannot be obtained, be sure the system has time to stabilize (10–15
minutes).
3. Be sure the sensing bulb is located at the outlet side of the evaporator (about 3–4 inches away from the
evaporator) and be sure to insulate well and clamp tightly to tubing. If the system pressures are still not
adequate, take second water and air temperature reading and go over other parts of the system for pos-
sible problems. If proper refrigerant charge is questionable, evacuate the refrigeration system and recharge
to nameplate specifications. Leak check the refrigeration system. If the expansion valve still malfunctions
replace the valve.
Use general refrigeration system practices when replacing and recharging the unit. After new valve is in place,
go through previous monitored adjustments and troubleshooting to be sure valve is functioning properly.
NOTE: On water-cooled Units, adjust the condenser modulating valve before troubleshooting the
expansion valve.
CAUTION: Very high discharge pressure is present in the refrigeration system. Quick
disconnects on your gages will minimize Danger and loss of refrigerant. Comply with
federal regulations for reclaiming refrigerant.

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TEMPERATURE/PRESSURE CHART
REFRIGERANT TYPE
R404A
+10 LB
DISCHARGE PRESSURE
WATER TEMPERATURE
AIR TEMPERATURE 40 65 90
50–174 177 180
60–202 205 208
70–230 233 236
80–265 269 272
90–300 304 307
100–328 334 340
NOTE: The thermostatic expansion valve is non-adjustable on all models
CONDENSER MODULATING VALVE (Water Cooled Only)
The reason for using a water modulating valve is to supply the correct amount of water to the condenser to
maintain the proper operating pressure in the refrigeration system high side. The flow of water through the valve
is increased as the high side pressure rises and decreases as high side pressure lowers.
FIGURE 3. ADJUSTMENT SCREW
To calibrate the amount of water flow with the refrigeration system high side pressure, turn adjustment screw
located on end of the valve opposite the bellows (see Figure 3). Turn adjustment screw counterclockwise to
raise opening point. Opening point of valve should be set to maintain proper operating pressure in refrigeration
system high side. Refer to TEMPERATURE/PRESSURE CHART. Closing point of valve should be set low
enough to close valve during compressor stand by periods.

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NOTE: Cold water will absorb more heat faster than warm water. The water flow will therefore automati-
cally increase as inlet temperature increases.
CONDENSER MODULATING VALVE REMOVAL
1. Disconnect power to unit, shut off water supply to condenser, then reclaim refrigerant from system.
2. Remove inlet water line from Condenser modulating Valve. Also remove tube from refrigerant high side
line.
3. Remove Condenser Modulating Valve and bracket from unit.
4. Remove valve from bracket.
5. Replace Condenser Modulating Valve by reversing Steps 2 thru 4, then pull system into vacuum.
6. Recharge unit with refrigerant per nameplate.
7. Turn power and water on to the unit.
8. With unit operating, adjust modulating valve to proper setting.
9. Go through a complete system check.
GEAR MOTOR
The gear motor is equipped with a start relay and a manual reset overload. When current is applied, the relay
energizes and completes the circuit to the start winding. The motor reaches a predetermined speed and the
relay drops out, disconnecting the start winding. The run winding remains in the circuit as long as current is ap-
plied.
The purpose of the overload is to automatically shut off the motor in the event of a mechanical bind of the trans-
mission, an overload condition within the evaporator, or an electrical malfunction. It does this by sensing amper-
age draw. If the motor stalls the start relay would energize and stay energized. The amperage would surge to 5
to 6 times greater than normal draw. In this event, the overload would shut off the transmission in 4 to 8 sec-
onds.
If the motor is subjected to an abnormal load, but does not reach stall condition, the overload will react, but over
a greater period of time. The reaction time depends upon the amperage to which it is subjected.
The overload, through the safety circuit, also shuts off the compressor.
Refer to Troubleshooting Guide.

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TROUBLESHOOTING
IMPORTANT: Only qualified personnel should service internal components or electrical wiring.
TROUBLESHOOTING GEAR MOTORS
Basically, Gear motor problems can be narrowed down to three areas of checkout.
THE GEARMOTOR WILL NOT RUN
1. No voltage to the transmission terminals –check external circuit.
2. Low voltage –check voltage supply.
3. Problems in the gear motor electrical circuit. See Figure 4
THE GEARMOTOR STARTS BUTS TRIPS REPEATEDLY ON THE
OVERLOAD PROTECTOR
1. Voltage –high or low voltage can cause the overload to trip.
2. High Gear motor amperage draw, see Specification Chart for ratings and Troubleshooting Guide.
FIGURE 4. OUTPUT SHAFT
THE MOTOR RUNS BUT OUTPUT SHAFT DOES NOT ROTATE
Replace defective gear motor.
CAUTION: Be sure unit is disconnected from the power source. Disconnect the
transmission cable.
OVERLOAD CHECK:
1. Allow motor to cool and reset overload if necessary.
2. Remove motor end bell and stator, if necessary.
3. Check terminals 1 and 3 on overload. No continuity replace overload. Use a volt–ohm meter. See Figures 4
and 5.
MOTOR CHECK:
The resistance readings on the windings will be between 5 to 25 ohms. A meter capable of these low readings
must be used. The Start Relay cover must be removed. NOTE: Gear motor and related components can be
checked from Pin Connector. See Figures 5 and 6.

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If no continuity on start or run winding test, replace stator. If continuity on grounded motor test, replace stator.
INSTALLATION AND SHAFT SEAL REPLACEMENT
(See Figure 5)
1. Place shaft seal locator seat over gear motor output shaft, embossed side down, and push down until shaft
seal seat rests flush on top of gear motor.
2. Place rubber coated ceramic seal (important: ceramic face up) over output shaft and push down until seal
rests on top of the shaft seal seat. (Lubricate rubber on ceramic seal with [#06195] rubber lubricant.)
3. Place shaft seal with carbon face down(spring up) over output shaft and push (gently) downward until seal
rests on carbon face of the output shaft seal.
4. Push down on the washer compressing the spring on the output shaft seal. While holding the seals (down)
in place slide the E–ring into the groove on the output shaft.
FIGURE 5. SHAFT SEAL REPLACEMENT
FIGURE 6. EXTRUDING HEAD
FIGURE 7. AUGER
E–RING
WASHER, PLAIN FLAT
SHAFT SEAL
MOUNT, SHAFT SEAL
SEAT, SHAFT SEAL
GEARMOTOR
BEARING DELRIN
ANTI–ROTATION
RIB–3 PLACES
AUGER NUT
BEARING NYLON
GROOVE
EXTRUDING
HEAD
AUGER
“D”DRIVE

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AUGER & EXTRUDING HEAD REMOVAL
FIGURE 8. UPPER NUT AND BEARING
The upper bearings located on top of the auger is used to absorb the force between the auger and extruding
head.
The bearings are 3/32”thick. When they wear below 1/16”they should be replaced. Bearings to be in-
spected for wear during quarterly maintenance. See Figure 8.
TO REPLACE BEARINGS
1. Dispense all ice from unit.
2. Disconnect unit from electrical power.
3. Remove panels.
4. Unplug Dispense Motor and Ice Level Switch.
5. Remove four screws holding dispense cover in place.
6. Remove dispense cover assembly.
7. Use an open end wrench on auger nut connected to bearing and turn counterclockwise to remove assem-
bly.
8. Remove worn bearings. Replace with new bearings and then reinstall assembly.
NOTE: If auger turns with nut, remove cover on top of gear motor stator and hold rotor while loosen-
ing nut.
9. Reconnect power to icemaker.
TROUBLESHOOTING COMPRESSOR
Basically the compressor problems can be narrowed down to three areas of checkout–
1. THE COMPRESSOR WILL NOT RUN
A. No voltage to the compressor terminals –check circuit.
B. Low voltage –below 90% of nameplate rated voltage.
C. Problems in the compressor electrical circuit. See Electrical Checkout instructions.
2. THE COMPRESSOR STARTS BUT TRIPS REPEATEDLY ON THE OVERLOAD PROTECTOR
A. Check for proper fan operation and clean condenser.
B. Check the compressor suction and discharge pressures.

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C. Voltage –The voltage should be within 10% of the rated nameplate voltage.
D. High compressor amperage draw, it should never exceed 120% of the rated nameplate amperage.
See Electrical Checkout Instructions.
3. THE COMPRESSOR RUNS BUT WILL NOT REFRIGERATE
A. Check the compressor suction and discharge pressures. See TEMPERATURE/PRESSURE CHART.
ELECTRICAL CHECKOUT
FIGURE 9. ELECTRICAL BOX
1. Be sure the unit is disconnected from the power source. Remove the compressor electrical box cover.
Check for obvious damage and loose wires.
2. Disconnect the fan motor leads. Since capacitors store energy, short the capacitor with a screwdriver. This
will prevent shocks.
3. Disconnect the compressor terminal wires.
OVERLOAD CHECK
(See Figure 4)
4. Using a volt–ohm meter check the continuity across the overload, contacts #1 & #3. If none, wait for unit to
cool down and try again. If still no continuity, the overload protector is defective and should be replaced.
COMPRESSOR CHECK
(See Figure 9)
The resistance readings on the windings will be between 0.25 and 10.00 ohms, a meter capable of these low
readings must be used.
5. Check between ”C”& ”R.”Replace compressor if there is no continuity as the run windings are open.
6. Check between ”C”& ”S.”Replace the compressor if there is no continuity as the start windings are open.
7. Check between ”C”& ”R”, or ”S”and shell of the compressor. If there is continuity re-
place the compressor as the motor is grounded.
8. Check between screw terminal on the overload and ”C”on the compressor. Check and repair the lead or
connections if there is no continuity.
CAPACITOR CHECK
9. Check or replace start capacitor, disconnect bleed resistor before checking for shorted capacitor.

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10. Check or replace run capacitor (if supplied) check or shorted capacitor or either terminal grounded to case.
SAFETY CONTROLS
FIGURE 10. GEAR MOTOR THERMAL OVERLOAD
Your Icemaker unit has several safety and control devices incorporated into its design.
WARNING: None of the below described devices should ever be ”bypassed”to allow the
unit to function.
The safety and control system shut–off devices are:
1. Low water shut off reed switch located in icemaker float assembly. (Automatic reset type).
2. Gear motor thermal overload, manual reset type (red button on motor). See Figure 10.
3. Compressor thermal overload, automatic reset type.
4. Main service switch located on top of the control box.
5. Hopper shut–off.
6. High pressure cut out (water cooled only).
WARNING: Do not reset gear motor overload if ice is present in the evaporator.