Scotsman CMS1202, Service Manual

Page 1: ...s Specifications 2 Location Assembly 3 Stacking 4 For the Electrician 5 For the Plumber 6 Final Check List 7 Initial Start Up 8 Freeze Cycle Operation 10 Harvest Cycle Operation 11 Component Description 12 Cleaning 15 Adjustments 17 System Specifications 19 Service Diagnosis 20 Removal and Replacement 23 Parts Lists and Wiring Diagrams are located in the center of this manual printed on yellow pap...

Page 2: ...ice storage bin 48 wide model BH900 and with adaptors the following Scotsman ice storage bins BH1000 use KBT21 BH1360 When stacking onto another CMS1202 or a CMS1402 use kit KSCMS48 The normal finish for the machine is enamel sandalwood An optional stainless steel panel kit SPKCMS1402 can be field installed It contains a stainless steel top left side panel an overlay right side panel and front pan...

Page 3: ...hine Do NOT push the bin into postion instead lift it there Pushing a bin may damage the legs and leg mounts Level the bin in both the front to rear and side to side directions by adjusting the leg levelers Select a well ventilated location for air cooled models Note Air cooled models blow air from front to back 3 Inspect the bin top mounting gasket which should be flat with no wrinkles to provide...

Page 4: ... bottom one and align the two cabinets Use of a mechanical lift is recommended for this step At the back of the two icemakers bolt the upper icemaker cabinet to the lower icemaker cabinet using the mounting straps and bolts from the hardware package A stacking kit is required to interconnect the CMS ice level controls A different stacking kit is required to stack a CMS machine onto a CM model EVAP...

Page 5: ... under starting conditions Low voltages can cause erratic operation and may be responsible for serious damage to the icemaker Electrical connections are made at the rear of the icemaker inside the junction box All external wiring should conform to the national state and local electrical code requirements Usually an electrical permit and services of a licensed electrician will be required ELECTRICA...

Page 6: ...the local plumbing code Install a vertical open vent on drain line high point to insure good draining The ideal drain receptacle is a trapped and vented floor drain Recommended bin drain is 5 8 inch O D copper tubing and should be vented and run separately Insulation for high humidity areas is recommended Terminate drains above the drain receptacle with the proper air gap per local code The ice ma...

Page 7: ...made 8 Is the water supply line shut off valve installed and electrical wiring properly connected 9 Check all refrigerant lines and conduit lines to guard against vibration or rubbing and possible failure 10 Have the bin and cabinet been wiped clean 11 Has the Manufacturers Registration form been properly filled out Check for correct model and serial numbers from Serial nameplate then mail the com...

Page 8: ... distributors are properly seated at the top of the evaporators and that water is flowing over all cube cells Note Some water spray from the evaporators is normal when the machine is new The spray will quit after a few cycles 9 When the sump has filled move the compressor ON OFF toggle switch to the ON position 10 On air cooled models the fan motors will begin to blow warm air out the back of the ...

Page 9: ...set screw on the cam rotating the shaft so that the opening between the cams increases or decreases retightening the set screw when the cams are in the desired position More of an opening between the cams more harvest time An adjustment of the cube size control may be needed after the harvest time has be changed Check cube size again 14 Check Bin Ice Level Control With the icemaker in a harvest cy...

Page 10: ...and the water inlet solenoid valve are CLOSED When the ice cubes are partially formed the cube size control sensing bulb attached to the suction line will CLOSE and connect power to the timer motor The timer then controls the remainder of the freezing cycle The timer will keep the icemaker operating in the freezing cycle for a selected length of time This will give the ice cubes time to fully form...

Page 11: ...e by the warming effect of the hot gas condensing in each evaporator plate and the water cascading over the ice cubes The released ice cubes drop into the ice storage bin below At the end of the harvest cycle the timer cam will push in the microswitch actuator arm If there is no ice close to the bin level control s transducer a whole new cycle will begin If there is ice within 8 of the base of the...

Page 12: ...h harvest cycle and to prevent short cycling on the bin thermostat control Timer Timer Switch Assembly The timer cam is controlled by the cube size control The outer surface or large diameter lobe of the timer cam determines the timer cycle for finish freezing of the ice cubes while the inner surface or small diameter lobe determines the time cycle for the harvest cycle When the microswitch button...

Page 13: ... When set at FULL it will not allow the machine to fill the bin any closer to the ice machine than about 8 and it will not work if the distance to the bottom of the bin is greater than 8 feet Because it uses sound waves a slight ticking sound can be heard coming from the bottom of the machine There are two parts to the control the circuit board and the level control switch BIN ICE LEVEL SELECTOR S...

Page 14: ...ter to all cells of the evaporator plates The water pump pumps water from the sump up the vertical tygon tube to the tee From there water is channeled through the water manifold to the water distributors above each evaporator plate and from six holes within each distributor water flows to the cells of each side of the evaporator plates Gravity flow returns the unfrozen excess portion of water to t...

Page 15: ...he reservoir drain cap and drain the cleaning solution from the sump Replace the drain cap 12 Rotate the shaft of the timer and switch assembly CLOCKWISE to the harvest position low part of the cam against microswitch Move the WASH OFF ICE switch to the ICE position to start the Harvest cycle If after completing this procedure one or more evaporator plates does not have a full flow of water for ea...

Page 16: ... solution of 4 ounces of Scotsman Ice Machine Cleaner to 4 pints of hot 950 F to 1100 F water 2 Using rubber gloves dip a nylon scouring pad into the cleaning solution and scrub the scale off of the liner 3 After all the scale has been removed rinse all of the surfaces inside the bin with clean potable water To sanitize the bin and ice machine interior Use an approved sanitizer and follow the dire...

Page 17: ...e cube size control check other possible causes for cube size problems refer to Service Diagnosis section DO NOT perform adjustment when a new cube size control is installed until the control bulb has been properly installed in the tube well and the icemaker has been through a complete freezing and harvest cycle Adjustment of the cube size control is available to change the cubes to the correct si...

Page 18: ...equire a corresponding adjustment of the cube size control Rotating the shaft of the timer cam clockwise will allow putting the machine into either the freezing cycle or harvest cycle as required in the cleaning instructions To Adjust The Timer Switch Assembly The length of the harvest cycle can be changed by loosening the set screw on the cam and then rotating the shaft so that the opening betwee...

Page 19: ... Interior Height 8 from the base of the ice machine CHARACTERISTICS This machine uses R22 AIR COOLED Freeze cycle Average Discharge Pressure at 900 700 280 240 PSIG Average Suction Pressure at the end of Freeze 22 20 PSIG Average Freeze cycle time 17 minutes Average Amps 13 single phase 7 8 3 phase Harvest Cycle Average Discharge Pressure at 900 700 120 130 PSIG Average Suction Pressure during har...

Page 20: ...harge Air intake temperature too high air cooled Reduce room temperature Sump covers out of position Re position sump covers Cubes too small Adjust cube size Cube size control stuck open Replace cube size control Runs makes no ice Pump problem or water leak in reservoir Check water system and pump Water inlet valve either lets in no water or leaks through Replace inlet water valve Low refrigerant ...

Page 21: ...em Purge system evacuate and weigh in nameplate charge Poor air circulation or extreme hot location Relocate the cabinet or provide ventilation Overcharge of refrigerant Evacuate and weigh in nameplate charge Cube size too big unit runs out of water before harvest Adjust cube size control Inlet water valve leaks thru Replace valve Hot gas valve leaks thru At the end of the freeze cycle there shoul...

Page 22: ...ct electrical power and test ice machine circuit by attaching a jumper wire between bin thermostat posts on circuit board part no 12 1912 01 the circuit board with the timer on it Reconnect power If machine does not start go back to machine circuit If machine starts disconnect electrical power remove jumper wire and reconnect electrical power Then go to E E Transducer or ice level board assembly d...

Page 23: ...attachment for the left water distributor tube and notch also that the distributor manifold connections at the top center of each evaporator plate is snug against the top of the plate Cube Size Control To remove the cube size control 1 Remove front panel 2 Remove cover from control box 3 Trace capillary tube from the cube size control to the refrigerant suction line 4 Remove the coiled capillary t...

Page 24: ...hut OFF water supply to machine 2 Loosen and remove outlet water line from the inlet water solenoid valve assembly 3 Remove screws and pull the water solenoid valve out to gain access 4 Pull electrical cord from solenoid coil terminals 5 Remove inlet water fitting from the water solenoid valve To replace the inlet water valve assembly reverse the removal procedures Bin Ice Level Control Circuit Bo...