SERIES 322 ICE CUBE MACHINE Service/Installation Guide Part No. 166240008 March 17, 1995 THIS DOCUMENT CONTAINS IMPORTANT INFORMATION This Manual must be read and understood before installing or operating this equipment Ó IMI CORNELIUS INC; 1995 PRINTED IN U.S.
TABLE OF CONTENTS Page SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3 ELECTRICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PLUMBING CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . UNPACKING . . . . . . . . . . .
TABLE OF CONTENTS (cont’d) Page FLOODING TXV - PRODUCT SYMPTOMS . . . . . . . . . . . . . . . . . . . . . . . . . . . WATER REGULATING VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 21 SERVICE STEM VALVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MOISTURE CONTAMINATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . COMPRESSOR CONTACTOR . . . . . . . . . . . . . . . . . .
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. Understand Signal Words A signal word - DANGER, WARNING, OR CAUTION is used with the safety-alert symbol. DANGER identifies the most serious hazards. Safety signs with signal word DANGER or WARNING are typically near specific hazards.
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SPECIFICATIONS 322 SERIES 15.00 C 22.00 A 7.00 AIR IN E 23.50 21.00 D 5.00 23.50 FRONT 14.75 F 11.25 1.00 2.00 .75 2.75 2.25 OPENING 16.38 5.00 6 FT ELECTRICAL CORD B 22.00 NOTE: MUST USE 20 AMP RECEPTACLE A B C D E F WATER INLET PUMP OUT DRAIN ELECTRICAL CONNECTION CONDENSATE DRAIN CONDENSER (WATER OUT)(W/C ONLY) CONDENSER (WATER IN)(W/C ONLY) ill 140 Net Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122 lbs. Shipping Weight . . . . . . . . . . . . . . . . .
LEVELING 1. 1. If legs are used, adjust the leveling legs of the storage bin until the unit is level and all four(4) legs are in sold contact with the floor. Leveling is very important to obtain proper draining and to maintain the proper level in the water pump pan of the ice cuber. Note: If the bin is to be installed flush to the floor, the bin must be sealed to floor with an approved mastic such as Dow R.T.V. #732, 734, or G.E. #102, 108. This is an N.S.F.
Diagram 2 MAKE ELECTRICAL POWER SUPPLY CONNECTION Requirements: 115V/60 Hz 1 ph., 230V/60 Hz. 1 ph., or 220V/50 Hz. 1 ph when used. Refer to serial plate for minimum circuit ampacity and maximum time delay fuse size. All wiring must conform to national and local electrical codes. MAKE PLUMBING CONNECTIONS Water supply -- (install per local codes) (See diagram 3). The water inlet connection to the unit is a 3/8”male flare connection located at the rear of the ice machine.
NOTE: TAKE CARE NOT TO KINK OR COLLAPSE VINYL TUBING. POWER CORD (322 UNIT ONLY) STRAINER WATER (NON-DIRECTIONAL) SERVICE VALVES 50 PSI MAX. WATER PRESSURE WATER SUPPLY ICE MAKING WATER SUPPLY WC CONDENSER DUMP VALVE DRAIN VENT DRAIN WC CONDENSER DRAIN PIPE DRAIN CONDENSATION VENT OPEN TRAPPED OR VENTED DRAIN BIN DRAIN TYPICAL INSTALLATION: ALL ELECTRICAL & PLUMBING MUST BE DONE PER LOCAL CODES.
SUPPORT WEB ADJUST HERE RESERVOIR 1/4” WATER LEVEL FLOAT ASSEMBLY ILL023 WARNING: Ice maker will not operate properly when water supply temperature is below 50_F. or above 100_F. Water supply flowing pressure must not exceed 50 PSI. STARTING THE UNIT After the ice cuber has been unpacked and leveled and all plumbing and electrical connections have been made, start the unit, and check for proper operation.
Also check to see if the float valve is functioning properly and the correct water level is being maintained. Adjust if necessary. 2. Check the refrigerant circuit by making sure that the condenser fan is running. (This will be evident by air noise) Is the compressor running? (Feel the casing for vibration). Is the evaporator getting cold? 3. Check bin--harvest switch operation. )See procedure in manual).
Re--check per above procedure. SANITIZING AND CLEANING PROCEDURE 1. Remove front panel to gain access to the on--off clean switch. 2. Push switch to “Clean”and allow the ice on the evaporator to release or melt away. ELECTRICAL BOX SWITCH, DUMP SWITCH, ON/OFF/CLEAN WATER PUMP ILL063 3. Remove ice from storage bin. 4. If lime scale is present add 2 oz. of “Lime--A--Way”or “Calgon NickelSafe Ice Machine Cleaner”directly into water reservoir. Circulate for not longer than 10 minutes.
WATER TREATMENT Depending on the water source for the ice maker, water treatment may be necessary to prevent calcium or lime scale deposits, bad taste and odor, chlorine problems, as well as slime growth. If these conditions exist, contact your Cornelius Distributor or Dealer for information on water treatment systems Cornelius offers.
AVERAGE OPERATING CHARACTERISTICS AC322 IP Units FREEZE CYCLE HARVEST CYCLE AMBIENT TEMP _F WATER TEMP _F HEAD PRESSURE Psig SUCTION PRESSURE Psig CYCLE TIME Min:Sec HEAD PRESSURE Psig SUCTION PRESSURE Psig CYCLE TIME Min:Sec AVERAGE ICE WEIGHT lb/Cycle AVERAGE ICE WEIGHT lb/Day 70 50 167 25 9.6 133 94 .7 2.4 333 80 70 198 28 13.3 135 97 .7 3.0 305 90 70 229 31 15.5 152 110 .6 3.0 270 90 80 231 31 16.5 154 111 0.6 3.0 249 100 70 259 33 18.
166240008 12 3/17/95 WATER PUMP WATER DUMP VALVE WATER FLOAT VALVE REFRIGERATION AND WATER SYSTEMS MODELS AC322 S HOT GAS SOLENOID VALVE FAN MOTOR COMPRESSOR LOW SIDE SERVICE VALVE HEAT EXCHANGER HIGH SIDE SERVICE VALVE THERMOSTATIC EXPANSION VALVE EVAPORATOR FAN BLADES FILTER/DRIER AIR COOLED CONDENSER
3/17/95 13 166240008 S HOT GAS SOLENOID VALVE HIGH SIDE SERVICE VALVE THERMOSTATIC EXPANSION VALVE EVAPORATOR REFRIGERATION AND WATER SYSTEMS MODELS WC322 WATER PUMP WATER DUMP VALVE S WATER FLOAT VALVE COMPRESSOR LOW SIDE SERVICE VALVE PRESSURE SWITCH HEAT EXCHANGER WATER INLET FILTER/DRIER WATER-COOLED CONDENSER WATER REGULATING VALVE
DUMP CYCLE SUPPORT WEB ADJUST HERE RESERVOIR 1/4” WATER LEVEL FLOATASSEMBLY ILL023 1. With the proper water level in the water pan, start the water pump to circulate the water. Check that the float will return water level to original setting and stop inlet water. 2. Push the manual dump switch -- allow dump action to drain the water pan. When you release the momentary switch, the pump will stop and the float will return the water level back to its original setting and shut off the water supply. 3.
ADJUSTING BRIDGE THICKNESS TOP ROW 3/8I- 5/8IDIMPLE CENTER 1/8IBRIDGE BOTTOM 2 ROWS 3/16I- 1/4IBRIDGE BRIDGE 1/8I(0.32 CM) For optimum ice production and maximum cube separation, the ice connecting the individual cubes should be a minimum of 1/8I(.32cm) thick at the center area of the ice waffle. It is normal for the ice slab to be slightly thicker at the bottom and taper off in a slight wedge pattern at the top.
Cycle time (CT) = freeze time plus harvest time, in minutes and seconds. 1440 divided by CT = number of cycles per 24 hours. Measure weight of ice from one cycle in pounds and fractions of a pound. Example: Weight/cycle x cycles/day = total production/24 hrs. Compare to the production tables * If water cooled, be certain water regulator valve is set to maintain 225/235 PSI head pressure. Water Dump Valve D-15 D-13 YL RH Evap. Switch D-14 Contactor RH Evap. Water Pump YL LH Evap.
STATUS INDICATOR D6 D10 D11 D12 D13 D14 D5 D15 Green LED Yellow LED Green LED Green LED Yellow LED Green LED Red LED Green LED Condenser Fan Left Water Curtain Hot Gas Valve Water Pump Right Water Curtain Compressor Contactor Error Dump Valve Curtain Open D13 Yellow LED off Right evaporator curtain open. D10 Yellow LED off Left evaporator curtain open. Pre-Chill Mode D6 Green LED (on or off) Condenser fan cycles on & off depending upon condenser temperature.
CIRCUIT BOARD DIAGNOSIS Turn the power switch OFF, and center position. Disconnect the proximity switches and thermistors from the circuit board. Remove a sleeve jumper from the options terminal and place it on terminals 4 and 5 of the test plug. Turn the power switch to the “ON”position and remove the sleeve jumper from terminals 4 and 5. The LED indicators will cycle “on”for approximately 2 seconds each in the following sequence. 1.
COMPONENT FUNCTION TEST PLUG Board manufactures check point. DO NOT ATTEMPT ANY VOLTAGE CHECKS AT THESE PINS. SENSORS Condenser sensor (white) and suction line sensor (brown) are thermistors rated 1k ohm at room temperature. S Condenser sensor signals the circuit board for fan cycling and also serves as the high temperature safety shut down. The red “Error LED”will flash on and off every second, during high temperature safety shut down. Product is functionally shut down.
VOLTAGE SELECTOR SWITCH 1. Selector bar in center position, switch is open. Product is inoperative. 2. Selector bar in down position, selection is for 115 VAC. 3. Selector bar in up position, selection is for 230 VAC. SENSOR [THERMISTOR] DIAGNOSIS Sensors Condenser or suction line -- Turn Cuber power switch OFF. Disconnect sensor plug from board. Use digital multimeter set for D.C. Voltage. Turn power switch ON. Connect leads of meter across the two pins of the sensor being checked. Meter should read 2.
1. The condenser and fan blade are clean and have proper operating conditions. 2. Water supply to the product is correct and flow over the evaporator is correct. 3. Cuber refrigerant charge is correct. 4. TXV sensing bulb is properly located and secured to the suction line and correctly insulated. 5. Hot gas valve(s) are not leaking and/or seeping through. Starving TXV - Product Symptoms 1. Suction pressure lower than normal for the operating conditions. 2. Ice production lower than normal and/or none. 3.
The water regulating valve must close off condenser water flow completely during the “hot gas”harvest cycle. There should be no discharge water flowing out of the condenser during the harvest cycle. Should the valve fail to close during the harvest mode, the condenser will continue to condense the compressor discharge vapor needed for the harvest cycle and this will result in long harvest times.
Readings in the range listed below 100 Meg-Ohm would be an indicator that the system being tested may have a contamination problem. Where does the problem come from? As an example, the filter drier may become saturated and hold large percentages of moisture and the system function without a problem until such time as the product operating conditions change. Should the room temperature increase, or the condenser plug-up etc.
Current -For the current type, contacts are normally open. The start contacts close by the high current draw from the locked rotor condition with only the run winding in the circuit. As the contacts close, the start capacitor and the start winding is energized and the compressor starts. At approximately 80% of its operating speed the current draw drops off, the relay contacts open removing the start winding and start capacitor from the circuit.
Leak Detection The new non-chlorine based refrigerants [HP - 62/R 404A] require special leak detection devices other than what has been standard for the CFC’s. While the instruments for leak detection are different, the processes have not changed. Basics to remember: 1. Look for signs of oil when you visually start your leak check process. Oil is carried with the refrigerant. If the oil has leaked out so will the refrigerant. 2. Refrigerant vapor is heavier than air.
The system should be evacuated to approximately 200/250 microns. Then perform a 5 minute holding test. You may expect a low grade loss of the vacuum as normal. However, a rapid rise to normal atmospheric pressure would signal a system leak is present and must be located and repaired before recharging the product. A slower pressure rise to approximately 1500 microns would signal moisture still present in the refrigeration system.
Chemical analysis is the key requirement to the definition of “Reclaim”. Regardless of the purity levels reached by a re-processing method, the refrigerant is not “reclaimed”unless it has been chemically analyzed and meets ARI Standard. CONDENSER FAN CYCLING CONTROL The condenser fan on air-cooled cubers is cycled by the circuit board.
CORNELIUS LIMITED COMMERCIAL WARRANTY PLAN TO THE ORIGINAL OWNER OF A CORNELIUS COMMERCIAL CUBE ICEMAKER This warranty applies to Icemakers installed within the United States, Canada, Mexico and Puerto Rico only. For warranty information outside the U.S., Canada, Mexico and Puerto Rico, contact your nearest IMI Cornelius Sales Office. PARTS WARRANTY PERIOD IMI CORNELIUS INC.
IMI CORNELIUS INC.
