CMS1202R INTRODUCTION To the owner or user: This service manual is intended to provide you and the maintenance or service technician with the information needed to install, start up, clean, maintain and service this ice system. Table of Contents Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 For the Installer Location & Assembly Stacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CMS1202R FOR THE INSTALLER The CMS1202R will fit the following Scotsman ice storage bins: A remote condenser and precharged tubing kit are required to assemble this ice system. • BH900 • BH1000 (with bin top KBT21) • BH1360 The normal finish for the machine is enamel sandalwood. An optional stainless steel panel kit (SPKCM1402) can be field installed. It contains a stainless steel top, left side panel, an overlay right side panel, and front panel.
CMS1202R FOR THE INSTALLER: Location & Assembly Location: After uncrating and inspection, the unit is ready for installation. It is important that the machine be installed in a location where it has enough space around it to be accessible for service. Try to avoid hot, dirty and crowded locations. Be sure that the location for the machine is within the envrionmental limitations. Storage Bin: Tip the storage bin on its back, using parts of the carton to protect the exterior finish.
CMS1202R FOR THE INSTALLER: Location & Assembly Stacking Instructions When stacking two units, remove the top panel and the evaporator cover from the lower icemaker. (The top removed from the lower icemaker will no longer have any function.) Carefully lift the uncrated top unit onto the bottom one and align the two cabinets. Use of a mechanical lift is recommended for this step.
CMS1202R FOR THE INSTALLER: Remote Condenser Locate the condenser as near as possible to the interior location of the ice maker. Precharged Line Routing Location of the condenser is limited by the specific length of precharged refrigerant tubing supplied for the application. The pre-charged tubing connects the icemaker to the remote condenser. The condenser must be above the ice maker. Do not connect precharged tubing until all routing and forming of the tubing is complete.
CMS1202R FOR THE INSTALLER: Coupling Instructions ////////////////////////////////CAUTION///////////////////////////////// The couplings on the sets of precharged lines are self sealing when installed properly. Carefully follow the instructions: //////////////////////////////////////////////////////////////////////////////// Initial Connections: 1. Remove the protector caps and plugs. Wipe the seats and threaded surfaces with a clean cloth to be certain that no foreign matter remains on them.
CMS1202R FOR THE ELECTRICIAN SEE NAMEPLATE for current requirements to determine wire size to be used for electrical hookup. When the cuber and the remote condenser are connected, each must be grounded to the other using the ground screws provided in the respective junction boxes. The cuber then requires a solid chassis to chassis earth ground wire. See Wiring Diagram. Be certain the cuber is connected to its own electrical circuit and individually fused.
CMS1202R FOR THE PLUMBER The recommended water supply line is a 3/8-inch O.D. copper tubing with a minimum operating pressure of 20 PSIG and a maximum of 80 PSIG. Connect to cold water supply line with standard plumbing fittings, with shut off valve installed in an accessible place between the water supply and the cuber. ln some cases a plumber will be required. Water Limitations: An ice machine is a food manufacturing plant, it takes in a raw material, water, and turns it into a food product, ice.
CMS1202R FINAL CHECK LIST 1. Is the cabinet in a room where ambient temperatures are within the minimum and maximum temperatures specified? 2. Is there clearance at the left and back sides of the cabinet for service access? 3. Has water supply pressure been checked to insure a minimum of 20 PSIG and a maximum of 80 PSIG operating pressure? 4. Is the cabinet level? 5. Check that any shipping material has been removed from inside the cabinet. FINAL INSTALLATION 6.
CMS1202R INITIAL START UP Before Start Up: FRONT VIEW OF TIMER 1. Check that the ICE-OFF-WASH rocker switch and the Compressor ON-OFF switch are in the OFF position. 2. Switch on the electrical power. Electrical power must be supplied to the ice machine for 12 hours before starting the compressor for the first time. The crankcase heater will now warm up the compressor’s oil. The oil is warmed to evaporate any refrigerant that may have collected in it.
CMS1202R INITIAL START UP 9. Check operation of the freezing cycle: Ice will begin to from from the top of the evaporators down. After the first cycle, freezing time will range between 12 and 15 minutes. Longer time for temperatures above 70oF. and shorter time required when temperatures are below 70oF. Average complete cycle time is about 16 minutes. CUBE SIZE DIAGRAM JUST RIGHT 10. After an ice harvest, check Cube Size.
CMS1202R FREEZING CYCLE OPERATION Water from the sump assembly is pumped to the water distributor system at the top of each evaporator plate. From the water distributor the water cascades by gravity over all cells of the plate and to the sump assembly below. At the beginning of the freezing cycle, the electrical circuit is completed to the compressor and the water pump. The water pump operates continuously, through both the freezing cycle and the harvest cycle.
CMS1202R HARVEST CYCLE - HOT GAS BYPASS When the timer switches the icemaker into the harvest cycle, high pressure, high temperature gas refrigerant being discharged from the compressor is diverted from the condenser through the hot gas solenoid valve into each evaporator plate. During this cycle, the refrigerant bypasses the condenser.
CMS1202R COMPONENT DESCRIPTION Cube Size Control Timer - Timer & Switch Assembly This reverse acting thermostat controls the length of the freezing cycle. It is sensing the temperature of the suction line. When the suction line gets cold enough, the cube size control closes (on temperature fall) and starts the timer.
CMS1202R COMPONENT DESCRIPTION Bin Level Control This electronic control uses sound waves to measure the distance between the bottom of the ice machine and the top of the ice in the bin. It is designed to control the machine’s ice production to maintain that distance. The control is adjustable so that the ice machine will maintain a certain height of ice.
CMS1202R COMPONENT DESCRIPTION Water Inlet Solenoid Valve Hot Gas Solenoid Valve The water inlet solenoid valve fills the sump assembly with water and excess water overflows out the standpipe and down the drain. This action fills and rinses the sump during each harvest cycle. The flow rate is 1 g.p.m.
CMS1202R CLEANING ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// A Scotsman Ice System represents a sizable investment of time and money in any company’s business. In order to receive the best return for that investment, it MUST receive periodic maintenance. Maintenance and Cleaning should be scheduled at a minimum of twice per year.
CMS1202R CLEANING Remote Condenser To remove scale: 1. Shut off the ice machine. 1. Mix a cleaning solution of 4 ounces of Scotsman Ice Machine Cleaner to 4 pints of hot (950 F. to 1100F.) water. The fan blade can cause personal injury. Disconnect power before beginning to clean condenser. Scotsman Ice Machine Cleaner contains acids. These compounds may cause burns. If swallowed, DO NOT induce vomiting. Give large amounts of water or milk. Call Physician immediately.
CMS1202R SYSTEM SPECIFICATIONS The following numbers can be used as a guideline. There will be some variation from unit to unit. Typical Cycle Time • 17 minutes @ 70oF. air and 50oF. water; 20 minutes @ 90oF. air and 70oF. water. Typical Harvest Ice Weight • 13-14 lbs. Typical Low Side Pressure • 21-22 PSIG @ 70oF. air and 50oF. water • 24 PSIG @ 90oF. air and 70oF. water Typical Freeze Cycle Discharge Pressure • 250 - 210 PSIG Refrigerant Charge • 256 ounces of R-22 Harvest Time • Preset at 3.
CMS1202R ADJUSTMENTS To Adjust The Timer & Switch Assembly: MICROSWITCH Electrical power present in the control box can cause personal injury. Disconnect power before beginning to adjust timer. Adjustment Of The Timer & Switch Assembly One complete revolution of the cam on the timer takes eight minutes. The normal setting is three and one-half minutes, as set at the factory. lt is important that the length of the harvest cycle allow enough time for all the ice cubes to fall from the evaporator.
CMS1202R SERVICE DIAGNOSIS: Water SYMPTOM POSSIBLE CAUSE PROBABLE FIX No ice is made Inlet water valve will not open or is dirty Clean inlet screen, check coil, replace valve if required No water being pumped over evaporators. Check pump motor, replace pump if motor will not run. No water in reservoir, check inlet water valve, check reservoir for leak.
CMS1202R SERVICE DIAGNOSIS: Electrical and/or Adjustments SYMPTOM POSSIBLE CAUSE PROBABLE FIX Machine does not operate No power Reconnect power High pressure control open Reset, check machine High temperature cut out open Hot gas valve leaks thru, replace P. C.
CMS1202R SERVICE DIAGNOSIS: Refrigeration and/or Mechanical SYMPTOM POSSIBLE CAUSE PROBABLE FIX Poor harvest Hot gas valve does not open Check for power to the coil, check for not opening, replace Head pressure control valve does not Replace head pressure control valve. maintain enough head pressure.
CMS1202R SERVICE DIAGNOSIS: Bin Ice Level Control CONDITION DETERMINE CAUSE PROBABLE CORRECTION Ice Machine does not run, it has power to it, the high pressure control is closed, the on/off switch is set to ON (the compressor will not operate until the liquid line valve opens, but the pump should be working if there is no ice in the bin). A. Listen for a ticking sound from transducer. If no noise, go to C. If there is a noise, check for a light on the board (models built after 4/93).
CMS1202R REMOVAL AND REPLACEMENT Cube Size Control To remove the cube size control: Electrical Shock Hazard. Electrical shock can cause personal injury. Disconnect power before beginning to service components. 1. Remove front panel. 2. Remove cover from control box. 3. Trace capillary tube, from the cube size control to the refrigerant suction line. NOTCH IN BACK OF CONTROL BOX Water Distributor Tubes And Manifold Tubes To remove the water distributor tube and manifold tube: 1. Remove the front panel. 2.
CMS1202R REMOVAL AND REPLACEMENT Inlet Water Solenoid Valve Assembly To remove the inlet water solenoid valve assembly: Electrical Shock Hazard. Electrical shock can cause personal injury. Disconnect power before beginning to service components. 1. Shut 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. INLET WATER VALVE Water Pump 1. Remove front panel. 2.
CMS1202R REMOVAL AND REPLACEMENT Thermostatic Expansion Valve Hot Gas or Liquid Line Valve. 1. Before replaceing this valve, be certain that the valve is the cause of the problem, and cannot be adjusted. 1. Before replaceing this valve, be certain that the valve is the cause of the problem. 2. Remove the front panel. 3. Dischargeand recover the refrigerant. 3. Discharge and recover the refrigerant. 4. Unplug the coil of the valve. 4.
