Scotsman CU50 - Manuals

Water Quality All water, including potable water supplied bymunicipalities, contains some impurities orminerals. Water absorbs impurities from the air asrain and/or as it flows through the ground. Some ofthe impurities are solid particles, these are knownas suspended solids, and a fine particle filt...

Door swing change The door can be attached to open with hinges onthe left or right. Retain all screws for re-use. To change: 1. Remove top hinge pin from hinge. 2. Tilt top of door away from cabinet and lift dooroff bottom hinge. 3. Remove two screws and top hinge. 4. Remove plugs or screws from low...

Installation Notes Sealing to floor: In some cases the base of the icemachine must be sealed to the floor to meet localcode. Food grade silastic sealant such asScotsman part number 19-0529-01 isrecommended. Place the machine in the intended location. Turnthe leg levelers in until the bottom of the u...

Installation: Water & Drain The recommended water supply tubing is ¼ inchOD copper. Stainless steel flex or reinforced PVCtube may also be used. Install an easily accessibleshut-off valve between the supply and the unit. Thisshut-off valve should not be installed behind theunit. Note: Do not use...

Gravity Drain Caution: Restrictions in the drain system to themachine will cause water to back up into the icestorage bin and melt the ice. Gravity drain tubingmust be vented, have no kinks and slope to thebuilding drain. Air gaps are typically required bylocal code. 1. Place the ice machine in fron...

Electrical The ice machine is supplied with a power cord. Donot remove the grounding pin from the cord’s plug.Do not use extension cords. Follow all codes.Connect the machine to its own 115 volt, 15 ampcircuit. 1. If the electrical outlet for the ice maker isbehind the unit, plug in the unit. 2. Pos...

Cube Size Adjustment The cube size can be adjusted by changing theamount of freeze cycle time. This is done by abutton press sequence. Note: There is only one correct cube size. See theillustrations. To adjust cube size: 1. Shut the machine off: If it's off on bin full pressand release the On/Off bu...

Harvest Time Adjustment The harvest time can be adjusted so that all the iceharvests during the cycle, plus a few secondsextra. This is done by a button press sequence. Note: Do not set harvest time shorter than theactual time it takes to release all the cubes. To adjust Harvest Time: 1. Shut the ma...

Control Settings Automatic water purge enable / disable The control is set at the factory to automaticallyselect the proper amount of water purge. If desired,that can be disabled, and a typical purge amountused. To disable Automatic purge selection: 1. Press and hold the On/Off button until the unit...

Use No special instructions are needed for use. Justtake as much ice as you need, the machine willreplace it. A scoop is provided, and it can be storedin the machine using the loop of tubing on the rightside as a holder. The machine can be shut off anytime by justpushing and releasing the On/Off but...

How to clean the condenser and winterize. Condenser cleaning The condenser is like the radiator on a car, it hasfins and tubes that can become clogged with dirtand lint. To clean: 1. Remove the kickplate and front service panel. 2. Locate the condenser surface. 3. Vacuum the surface, removing all du...

How to remove scale from the ice making system. 1. Scoop out all of the ice, either discard it or saveit in an ice chest or cooler. 2. Press and HOLD the On/off button in for 3seconds until the Green light goes out. 3. Press and HOLD the both the Clean-Reset andOn/Off buttons for 5 seconds. The Time...

System Information Overall: • Refrigerant: 8 oz R-134a • Compressor: Hermetic, 1300 BTUH, • Condenser: Forced draft • Fan blade: 5 blade, 7 inch • Evaporator: Inverted, 24 cube cells. Coppercups attached to continuous serpentine • Metering device: Cap tube • Defrost method: Hot gas bypass with water...

Water System The controller uses a Water Sensor to check forthe presence of water in the reservoir and tomeasure the conductivity of the water. The water sensor consists of two stainless steelprobes located in a holder next to the water pump. The probes sense the conductivity of the water.The higher...

Components March 2010 Page 19 CU50Service Manual Control Panel, Bin Light and Curtain Evaporator Platen Scoop and Thermostat Bracket Evaporator and Controller Condenser and Bin Thermostat Inlet Water Solenoid Valve Model and Serial Tag Location

Controller The controller is located at the front of the unit,under the top panel. It is powered by a 12 volt transformer. It has 5indicator lights: • Compressor - Light is ON if compressor is powered • Water - Light is ON if inlet water solenoid valve is powered • Hot Gas - Light is ON when Hot Gas...

Performance Information Ice per cycle: 1 lb Water drained / cycle: Varies by harvest cyclelength and purge setting. Typical amounts are @70/50 = 52 oz. @ 90/70 = 13 oz Compressor amps: 2.6 - 3.2 March 2010 Page 21 CU50Service Manual Freeze Cycle, Minutes Air Temperature 100 90 80 70 60 50 WaterTempe...

Refrigeration System March 2010 Page 22 CU50Service Manual Suction Pressure -10 0 10 20 30 40 50 60 70 T ime PSI G Discharge Pressure 50 60 70 80 90 100 110 120 130 140 150 Time PSIG

Thermistor Values March 2010 Page 23 CU50Service Manual 0· · · · 85325 1· · · · 82661 2· · · · 80090 3· · · · 77607 4· · · · 75210 5· · · · 72896 6· · · · 70660 7· · · · 68501 8· · · · 66415 9· · · · 64400 10 · · · 62453 11 · · · 60571 12 · · · 58752 13 · · · 56995 14 · · · 55296 15 · · · 53653 16 ·...

Service Diagnosis No Ice Problem Likely Cause Probable Solution No power to unit Power disconnected Check breaker or fuse. Reset orreplace, restart and check No power to controller Transformer open Replace transformer Shut down on maximumwater fill time - water lightflashing Water shut off Restore w...

Removal and Repair Bin Thermostat 1. Disconnect electrical power. 2. Remove service panel. 3. Remove back panel. Note: If unit is built in it must be pulled out tochange the bin thermostat. 4. Pull cap tube out from the back of the icestorage bin and cap tube holder. 5. Remove two screws and the bin...

Removal and Repair Evaporator Thermistor Note: If unit is built in it must be pulled out tochange the evaporator thermistor. 1. Shut machine off. If unit was making ice,manually harvest the ice. 2. Disconnect electrical power. 3. Remove top panel. 4. Remove cover from controller box. 5. Disconnect t...

Removal and Repair - Cabinet Removal Certain components require the removal of thecabinet for repair access. 1. If the machine is in a freeze mode, perform amanual harvest. 2. Remove all ice. 3. Drain reservoir. 4. Remove service panel and kick plate. 5. Remove back panel. 6. Disconnect electrical p...

Refrigeration Service This ice machine use R-134a type refrigerant.There are specific rules for handling thatrefrigerant. To check for system pressures, add a field suppliedclamp-on type service valve as a temporary meansof system access. After diagnosis and before finalrepair, replace the clamp-on ...