Service Manual - CMS1402

CMS1402INTRODUCTIONTo the owner or user: This service manual isintended to provide you and the maintenance orservice technician with the information needed toinstall, start up, clean, maintain and service thisice system. Table of Contents 2Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3For the Installer 4Location & Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Stacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6For the Electrician . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7For the Plumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Final Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Initial Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Freeze Cycle Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Harvest Cycle Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20System Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Removal and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Parts Lists and Wiring Diagrams are located in thecenter of this manual, printed on yellow paper.September 1993 Page 1

CMS1402 Scotsman Ice Systems are designed and manufactured with the highest regard for safetyFOR THE INSTALLER and performance. They meet or exceed the standards of U.L., N.S.F., and C.S.A.The CMS1402B will fit the following Scotsman ice Scotsman assumes no liability or responsibility ofstorage bin (48\" wide): BH900, and with adaptors, any kind for products manufactured by Scotsmanonto the following Scotsman ice storage bins: that have been altered in any way, including the use of any parts and/or other components not •BH1000 (with KBT21) or BH1360; specifically approved by Scotsman. Scotsman reserves the right to make designand it will stack (with kits) onto the following ice changes and/or improvements at any time.machines: Specifications and designs are subject to change without notice. •CMS1202, or CMS1402 (use KSCMS48). Air CooledThe stacking kit includes gaskets and trim strip.The normal finish for the machine is enamelsandalwood. An optional stainless steel panel kit(SPKCMS48) can be field installed. It contains astainless steel top, left side panel, an overlay rightside panel, and front panels. Note: \"B\" model’s have two front panels, production began early 1992. Water CooledModel Number Dimensions (w/o bin) Basic Electrical Minimum Circuit Maximum Refrigerant Condenser W\" x D\" x H\" Ampacity* Fuse Size Charge TypeCMS1402AE-3B 48 x 243⁄8 x 271⁄2 208-230/60/3 20.2 20 60 oz. R-22 AirCMS1402WE-3B 48 x 243⁄8 x 271⁄2 208-230/60/3 19.5 20 64 oz. R-22 WaterCMS1402AE-32B 48 x 243⁄8 x 271⁄2 208-230/60/1 31 30 60 oz. R-22 AirCMS1402WE-32B 48 x 243⁄8 x 271⁄2 208-230/60/1 30.3 30 64 oz. R-22 Water* Minimum Circuit Ampacity is used to determine wire size and type per the National Electric Code. If thenumbers listed above are not the same as the nameplate, go by the nameplate.This ice system is designed to be installed indoors, in a controlled environment.Air Temperature MINIMUM MAXIMUMWater Temperature 500F. 1000F. 400F. 1000F.Water Pressure 20 psi 80 psi September 1993 Page 2

CMS1402FOR THE INSTALLER: Location & AssemblyLocation: ICE MACHINE AND BIN ASSEMBLYAfter uncrating and inspection, the unit is ready for SHIPPINGinstallation. It is important that the machine be BRACKETSinstalled in a location where it has enough spacearound it to be accessible for service. A minimumof 6\" must be allowed at the back for air circulationon air cooled models. Try to avoid hot, dirty andcrowded locations. Be sure that the location for themachine is within the envrionmental limitations.Storage Bin:Tip the storage bin on its back, using parts of thecarton to protect the exterior finish. Install thecasters, use a heavy duty leg kit if stacking two icemachines on one bin.1. Arrange for proper electric, water and drain.See instructions for the plumber and for theelectrician.2. Single ice machine on bin: Use legs packed withthe bin. After mounting the legs position the icestorage bin in the selected location:Two ice machines on a bin require stacking kitKSCMS48. Use heavy duty leg kt KLP6 whenstacking onto the BH900.Note: Allow enough space to the left and back toservice the machine. Do NOT push the bin intopostion, instead, lift it there. Pushing a bin maydamage the legs and leg mounts.Level the bin in both the front to rear and side toside directions by adjusting the leg levelers.Stacked units use non-adjustable legs, and mustbe leveled with shims. Select a well ventilatedlocation for air cooled models.Note: Air cooled models blow air from front to back.3. Inspect the bin top mounting gasket whichshould be flat, with no wrinkles, to provide a goodwater seal when the cuber is installed on top of thebin.Ice Maker:Install the modular cuber on top of the bin using When alignment and leveling are completed,care to be sure a good seal is made between the tighten the bolts to secure the mounting straps.two cabinets. Use of a mechancial lift isrecommended. Align the holes in the bottom rear Remove the front panels, and remove theof the cabinet to mate with the two mounting holes evaporator shipping brackets and hardware.on the top rear of the bin.Use bolts and straps found on the back of theicemaker to secure the ice machine to the bin.September 1993 Page 3

CMS1402FOR THE INSTALLER: Location & AssemblyStacking Instructions (The top removed from the lower icemaker will no longer have any function.)A stacking kit, KSCMS48, is required tointerconnect the ice level controls, seal the A stainless steel bracket (from the kit) must befreezing compartments, and to retain the top attached to the top of the bottom machine beforeedges of the bottom unit’s front panels. the units are stacked.Follow the installation instructions of the stacking Place strips of gasket material (from the stackingkit, but in general: kit) on the top edges of the bottom unit’s freezing compartment.Use heavy duty legs (kit KLP6). Carefully lift the uncrated top unit onto the bottomWhen stacking two units, remove the top panel one and align the two cabinets. Use of aand the evaporator cover from the lower icemaker. mechanical lift is recommended for this step.STACKING 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. Add the relay box to interconnect the two ice machine’s bin control circuits. STAINLESS STEEL PANEL RETAINING BRACKET EVAPORATOR COVER September 1993 Page 4

FOR THE ELECTRICIAN CMS1402SEE NAMEPLATE for current requirements to Electrical connections are made at the rear ofdetermine wire size to be used for electrical the icemaker, inside the junction box.hookup. The cuber requires a solid chassis to All external wiring should conform to thechassis earth ground wire. See Wiring Diagram. national, state and local electrical codeBe certain the cuber is connected to its own requirements. Usually an electrical permit andelectrical circuit and individually fused. Voltage services of a licensed electrician will bevariation should not exceed ten percent of the required.nameplate rating, even under starting conditions.Low voltages can cause erratic operation and GROUND SCREWmay be responsible for serious damage to theicemaker. DETAIL OF JUNCTION BOX HAND DISCONNECT SWITCHJUNCTION BOXELECTRICAL CONNECTIONS, WATER COOLED ELECTRICAL CONNECTIONS, AIR COOLEDSeptember 1993 Page 5

CMS1402 CONNECTIONS:FOR THE PLUMBER All drains are gravity type and must have a minimum of 1/4-inch fall per foot on horizontalFOLLOW ALL LOCAL CODES: runs. The drains to be installed to conform with the local plumbing code. Install a vertical open vent onThe recommended water supply line is a 3/8-inch drain line high point to insure good draining. TheO.D. copper tubing with a minimum operating ideal drain receptacle is a trapped and vented floorpressure of 20 PSIG and a maximum of 80 PSIG. drain. Recommended bin drain is 5/8 inch O.D. copper tubing and should be vented and runConnect to cold water supply line with standard separately. Insulation for high humidity areas isplumbing fittings, with shut off valve installed in an recommended.accessible place between thewater supply and thecuber. ln some cases a plumber will be required. Water Cooled models require another inlet connection to the condenser, and another drain forWater Limitations: the condenser. The drain must be separate from the bin drain.An ice machine is a food manufacturing plant, ittakes in a raw material, water, and turns it inot a Bin Drain: The bin drains from the bottom, andfood product, ice. The purity of the water is very needs no vent unless there is a long horizontal run.important in obtaining pure ice and in maximizingproduct life. It is generally better to filter the water, Terminate drains above the drain receptacle withalthough there is no one filter that will cure all the proper air gap per local code.water problems. A good filter combined with apolyphosphate feeder gives about the best overall The ice machine sump drain is 3/4\" FPT. Thereperformance. must be a vent at this connection for proper sump drainage.Cold, potable water must be supplied to the waterinlet fitting. AIR COOLED WATER COOLEDOPTIONAL CONNECTIONS CONNECTIONSFILTER 3/8\" MALE SUMP DRAIN MUST CONDENSER CONDENSER INLET DRAIN FLARE BE VENTEDPOTABLE HAND SHUT OFF WATER VALVE SUPPLY 3/4\" FPT AIR GAP AIR GAP VENT BIN BETWEEN BETWEEN DRAIN DRAINDRAIN LINES LINES AND AND BUILDING DRAIN BUILDING DRAIN WATER SUPPLY AND DRAIN CONNECTION September 1993 Page 6

FINAL CHECK LIST CMS14021. Is the cabinet in a room where ambient 8. Is the water supply line shut off valve installedtemperatures are within the minimum and and electrical wiring properly connected?maximum temperatures specified? 9. Check all refrigerant lines and conduit lines, to2. Is there at least six inches clearance at the left guard against vibration or rubbing and possibleand back sides of the cabinet for proper air failure.circulation? (Air Cooled models) 10. Have the bin and cabinet been wiped clean?3. Has water supply pressure been checked toinsure a minimum of 20 PSIG and a maximum of 11. Has the Manufacturers Registration form been80 PSIG operating pressure? properly filled out? Check for correct model and serial numbers from Serial nameplate, then mail4. Is the cabinet level? the completed card to the SCOTSMAN factory.5. Check that any shipping material has been 12. Has the owner/user been given the Serviceremoved from inside the cabinet. Manual and instructed how to operate and maintain the icemaker?6. Check that the reservoir is properly secured tothe bottom of the evaporator plates. 13. Has the owner been given the name and telephone number of the authorized SCOTSMAN7. Have all electrical, water and drain connections Service Agency serving him?been made? LEVEL ASSEMBLYSUMPDRAINHAND SHUT OFF VALVE WATER COOLED DRAINHAND SHUT BINOFF VALVE DRAIN OPTIONAL FILTER FINAL INSTALLATION September 1993 Page 7

CMS1402INITIAL START UP1. Remove the front panels by removing screws atthe base and pulling out.2. Remove two screws and the control box cover. FRONT VIEW OF TIMER3. Check that the two switches on the control box, ACTUATOR MICROSWITCHthe ICE-OFF-WASH rocker switch and the BUTTONCOMPRESSOR ON-OFF toggle switch are in theOFF position.4. OPEN the water supply line shut off valve.5. Switch the electrical power to the machine ON. CAM6. Inside the control box is the shaft of the timerand the switch assembly. Rotate the shaft of thetimer until the actuator arm on the microswitchdrops off outer cam into cam slot. See “Front Viewof Timer”.7. Move the ICE-OFF-WASH rocker switch to the HARVESTICE position. PORTION8. Check the water fill cycle: For several minutes FREEZEthe inlet water valve will be open and water will PORTIONflow into the reservoir. Near end of the fill cycle,water should be overflowing the reservoir anddraining thru the reservoir drain. If at the end of thefill cycle the reservoir is not full, repeat step 6.Check that the sump covers are snapped in place.Check that the water distributors are properly CONTROL BOXseated at the top of the evaporators, and thatwater is flowing over all of the cube cells.Note: Some water may spray from the evaporatorsis normal when the machine is new. The spray willstop after a few batches of ice.9. When the sump has filled, move the compressorON-OFF toggle switch, to the ON position.10. On air cooled models the fan motors will beginto blow warm air out the back of the machine.Water cooled models will begin to flow warm waterout of the condenser drain.Note: To optimize the balance between ice CUBE SIZEproduction and water use, the freeze cycle CONTROLdischarge pressure must be 220 P.S.I.G. Checkthe discharge pressure and adjust the waterregulating valve to obtain 220 P.S.I.G. discharge.11. Check operation of the freezing cycle: Ice will TIMERbegin to form from the top of the evaporators to the ON/OFF/WASH SWITCHbottom. After the first cycle freezing time will range ICE LEVEL CONTROLbetween 12 and 15 minutes. Longer time fortemperatures above 70oF. and shorter timerequired when temperatures are below 70oF.Average complete cycle time is about 16 minutes. September 1993 Page 8

INITIAL START UP CMS140212. After an ice harvest check Cube Size. CUBE SIZE DIAGRAMThere is just enough water available in the JUST RIGHTreservoir to make one full sized batch of cubes.The water pump may pick up some air at the end When the cubes are the correct size, they will beof the freezing cycle, so at the end of freeze some connected together vertically, and drop off in strips.bubbles in the pump discharge hose is normal. Ifthe water pump stops pumping water before the The batch weight will be about 13.5 to 14.5 lb.end of freeze, the cube size control may be set too Note: If the cubes at the bottom rows of somecold, or the water system may be leaking water. evaporators are smaller than others, the size difference does not affect capacity or performance. However, thereCompare cube size to the \"Cube Size Diagram\" should be some ice in all cells. If not, contact the Factory.To adjust cube size, locate cube size control on the TOO SMALLfront of the control box. Rotate the adjustmentscrew one eighth of a turn: CAMS •Clockwise for larger ice cubes •COUNTER Clockwise for smaller ice cubesObserve size of the ice in the next ice cubeharvest and repeat the adjustment until the correctice cube size is achieved.13. Check harvest time. There must be enoughtime in the harvest cycle to defrost all the cubes,but not an excessive amount that will wastecapacity. The length of the harvest cycle isdetermined by the timer cam positions.If needed, adjust the harvest time so there areabout 15 seconds of harvest time left after the lastcube has fallen from the evaporators.Because harvest time varies with the water and air SETtemperatures at the ice machine, colder air and SCREWwater will result in faster ice making, but requiremore time for harvest. Do NOT adjust harvesttime too short or the machine will not harvestall the ice.The harvest time is set by: loosening the set screw ADJUSTMENT OF THE TIMERon the timer cam, rotating the shaft until theopening between the cams is either increased or The bin level control has two postions: Full anddecreased, and retightening the set screw. More of Partial. Full is about 8\" from the bottom of thean opening between the high parts of the two transducer socket. Note: The unit will make onecams = more harvest time. batch of ice when full if switched Off and then On.An adjustment of the cube size control may be 15. Wash out the bin with clean, potable water.needed after the harvest time has been changed.Check cube size again. 16. Replace all covers, panels and screws.14. Check Bin Ice Level Control: With the 17. Fill out the Warranty Registration andicemaker in the harvest cycle, place something Customer Evaluation form and send it in. Explainsolid directly below the transducer socket (located to the owner/user the significant specifications,in the base to the left of the evaporators). The operation, and maintenance requirements of themachine will then switch off at the END OF THE ice machine. Inform the owner of the name andHARVEST CYCLE. Within seconds after removal telephone number of the local authorizedof the obstruction, the icemaker will restart. SCOTSMAN Distributor, or service agency. September 1993 Page 9

CMS1402 INLET WATER DISTRIBUTION WATERFREEZING CYCLE OPERATION VALVE RESERVOIR WATER SCHEMATICWater from the sump assembly is pumped to the DRAINwater distributor system at the top of eachevaporator plate. From the water distributor thewater cascades by gravity over all cells of the plateand to the sump assembly below.At the beginning of the freezing cycle, the electricalcircuit is completed to the compressor and thewater pump. The water pump operatescontinuously, through both the freezing cycle andthe harvest cycle.During the freezing cycle, the hot gas solenoidvalve and the water inlet solenoid valve areCLOSED. When the ice cubes are partiallyformed, the cube size control (sensing bulbattached to the suction line) will CLOSE, andconnect power to the timer motor. The timer thencontrols the remainder of the freezing cycle. Thetimer will keep the icemaker operating in thefreezing cycle for a selected length of time. Thiswill give the ice cubes time to fully form. afterwhich, the timer will switch the icemaker into theharvest cycle, through the contacts of the timerassembly microswitch. HOT GAS VALVECONDENSER FAN MOTOR WATER MANIFOLD EVAPORATOR WATER INLET VALVEDISCHARGE COMPRESSOR ACCUMULATOR WATER PUMP RESERVOIR LINE REFRIGERATION SCHEMATIC September 1993 Page 10

CMS1402HARVEST CYCLE - HOT GAS BYPASSWhen the timer switches the icemaker into the WATERharvest cycle, the finish relay is de-energized, and DISTRIBUTIONthe hot gas valve and inlet water valve OPEN.Then high pressure, high temperature gas INLETrefrigerant being discharged from the compressor WATERis diverted from the condenser through the hot gas VALVEsolenoid valve into each evaporator plate. Duringthis cycle, the refrigerant bypasses the condenser. DRAIN RESERVOIRBoth the compressor and the water pump areoperating. WATER SCHEMATICThe finished ice cubes are released from the sidesof each evaporator plate by the warming effect ofthe hot gas condensing in each evaporator plateand the water cascading over the ice cubes. Thereleased ice cubes drop into the ice storage binbelow. At the end of the harvest cycle, the timercam will push in the microswitch actuator arm. Ifthere is no ice close to the bin level control’stransducer, a whole new cycle will begin. If there isice within 8\" of the base of the machine (when thebin level control is set for full) the icemaker willshut OFF. FAN MOTOR HOT GAS VALVE WATER MANIFOLDCONDENSER EVAPORATOR WATER WATER PUMP INLET VALVEDISCHARGE COMPRESSOR ACCUMULATOR RESERVOIR LINE REFRIGERATION SCHEMATIC September 1993 Page 11

CMS1402 Timer - Timer & Switch AssemblyCOMPONENT DESCRIPTION The timer cam is controlled by the cube size control. The outer surface, or large diameter lobeCube Size Control of the timer cam, determines the timer cycle for finish freezing of the ice cubes, while the innerThis reverse acting thermostat controls the length surface, or small diameter lobe, determines theof the freezing cycle. It is sensing the temperature time cycle for the harvest cycle.of the suction line. When the suction line gets coldenough, the cube size control closes (on When the microswitch button is pushed in there istemperature fall) and starts the timer. A change in power connected to the coil of the relay, and theeither ambient air or incoming water temperature unit is in the freeze cycle. When the microswitchwill affect the efficiency of the refrigeration system, button is released, the power to the relay isand this will vary the length of time it takes the stopped, and the unit goes into harvest. Theevaporator to reach the temperature at which the microswitch is actuated by a cam assemblycube size control is preset to close. See CUBE directly connected to the timer motor.SIZE ADJUSTMENT BEFORE attempting toadJust the control. One complete rotation of the cam will take eight minutes. Harvest is preset at three and one halfRelay minutes, but is adjustable.The multi-function, three pole, double throw, High Pressure Safety Controlplug-in relay is inserted into a receptacle on theprinted circuit board in the control box. The relay This is a manual reset control that shuts down thefunctions in part to by-pass the bin thermostat icemaker, should the discharge pressure evercontrol to prevent the icemaker from shutting OFF, reach 450 PSIG (air cooled) or 350 PSIG (waterwhen the bin thermostat opens during the freezing cooled). Found below the control box.cycle. The bypass action ensures full-sized icecubes with each harvest cycle and prevents shortcycling on the bin thermostat control.CONTROL BOX CUBE SIZE CONTROL RELAY TIMER AND MICROSWITCH ICE/OFF/WASH SWITCH BIN ICE LEVEL SELECTOR SWITCH September 1993 Page 12

CMS1402COMPONENT DESCRIPTIONBin Level ControlThis electronic control uses sound waves to Because it uses sound waves, a slight “ticking”measure the distance between the bottom of the sound can be heard coming from the bottom of theice machine and the top of the ice in the bin. It is machine.designed to control the machine’s ice production to There are two parts to the control, the circuitmaintain that distance. board, and the level control switch.The control is adjustable so that the ice machinewill maintain a certain height of ice. When set atFULL it will not allow the machine to fill the bin anycloser to the ice machine than about 8\", and it willnot work if the distance to the bottom of the bin isgreater than 8 feet. THE USER CAN SELECT THEBIN ICE ICE/OFF/WASH SWITCH AMOUNT OF ICE TO BELEVEL MAINTAINED IN THE BIN.SELECTORSWITCH SOUND WAVES FULL PARTIAL September 1993 Page 13

CMS1402 WATER DISTRIBUTORSCOMPONENT DESCRIPTIONWater Inlet Solenoid ValveThe water inlet solenoid valve fills the sumpassembly with water. Extra water overflows out theoverflow standpipe of the sump. This action fillsand rinses the sump during each harvest cycle.The flow rate is 1 g.p.m.Water Distribution SystemThe water distribution system functions to evenlysupply water to all cells of the evaporator plates.The water pump pumps water from the sump upthe vertical tygon tube to the tee. From there wateris channeled through the water manifold to thewater distributors, above each evaporator plate,and from six holes within each distributor, waterflows to the cells of each side of the evaporatorplates. Gravity flow returns the unfrozen excessportion of water to the sump reservoir forrecirculation.Hot Gas Solenoid ValveThe hot gas solenoid valve opens only during theharvest cycle, to divert the hot discharge gas fromthe compressor, by passing the condenser andcapillary tube, for direct flow to the evaporatorplates to release ice cubes from the ice cubemolds.Fan PressuSreUMCPonStTrAolN-DAPiIrP-CEooled Models only.ln both freeze and harvest cycles, the fan pressurecontrol functions to maintain a minimum dischargepressure by cycling the fan on and off. Theapproximate C.I. is 210 PSIG and C.O. is 193PSIGO. PTIONAL WATER FILTERStrainerA water strainer is located in the potable inlet waterVltHihnAeAeLNwVbDeaEtfeorresttrhaeinwear tfererqinuleent tslyo.lenoid valve. Clean SUMPPUMPCOMPONENT LOCATION DRAIN CAP September 1993 Page 14

CMS1402CLEANING/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////A Scotsman Ice System represents a sizable investment of time and money in any company’s business. Inorder 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./////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////CLEANING: ICEMAKER 7. Pour the cleaning solution into the reservoir until1. Remove screws and the front panel. full.2. Switch the compressor switch to OFF. Switch 8. Move the WASH/OFF/ICE switch to the WASH position. Electrical Shock Hazard. 9. Let the unit operate for 30 minutes. Electrical shock can cause personal injury. During the wash cycle, if the machine runs out of Cleaning procedures are solution, mix 2 more gallons of solution per step 6, done with the power ON. refill the sump and continue the wash cycle for the remainder of the 30 minutes.the WASH/OFF/ICE switch to OFF. 10. Move the WASH/OFF/ICE switch to the OFF3. Remove the control box cover, and rotate the position.shaft of the timer and switch assemblyCLOCKWISE advancing to the freezing cycle. 11. Remove the reservoir drain cap and drain the(Beginning of the higher part of the cam against cleaning solution from the sump. Replace the drainthe microswitch). cap.4. Open the ice storage bin door and empty the bin 12. Rotate the shaft of the timer and switchof ice. assembly CLOCKWISE to the harvest position (low part of the cam against microswitch). Move5. Remove the hose clamp, rubber cap and drain the WASH/OFF/ICE switch to the ICE position toall the water from the sump assembly into a start the Harvest cycle.container. If, after completing this procedure, one or moreReplace the rubber cap and hose clamp. evaporator plates does not have a full flow of water for each vertical column of cubes, shut down the operation and remove and clean all water distributor manifolds. Reinstall the water distributor manifolds.6. Mix 24 ounces of Scotsman Ice Machine Note: Thie ice making portion of the water systemCleaner with 2 gallons of warm (950F. - 1150F.) should be sanitized after cleaning by repeatingwater. steps 2-12, except substitute an approved sanitizing solution for the cleaning solution. Scotsman Ice Machine 13. Move the compressor ON-OFF switch to the Cleaner contains acids. ON position to start the icemaking process. These compounds may cause burns. ////////////////////////////////CAUTION////////////////////////////////// If swallowed, DO NOT DO NOT use ice produced from the cleaning induce vomiting. Give solution. Be sure none remains in the bin. large amounts of water or milk. Call Physician /////////////////////////////////////////////////////////////////////////////////// immediately. In case of external contact, flush 14. Check the next ice cube harvest to be sure that with water. the ice cubes are clear and the acid taste is gone. KEEP OUT OF THE 15. Add hot water to the bin to melt the ice. REACH OF CHILDREN. 16. Replace all panels. September 1993 Page 15

CMS1402 CLEANING AIR COOLED CONDENSER CONDENSERCLEANING MUST BEAIR COOLED CONDENSER CLEAN1. Disconnect electrical power. FILTER The fan blade can 3. After all the scale has been removed, rinse all of cause personal injury. the surfaces inside the bin with clean, potable Disconnect power water. before begining to clean condenser. To sanitize the bin and ice machine interior.2. Remove front panel. Use an approved sanitizer and follow the directions and warnings of that sanitizer or use the3. Clean or replace the air filter. following instructions for use of household bleach, if it meets local codes:4. Check to see that the inside of the condenser isclean; light should be visible through the fins. If not 1. Mix a sanitizing solution of 1 ounce ofclean the internal parts by vacuum, pressure household bleach to 2 gallons of water.washer and/or coil cleaner. 2. Using clean rubber gloves and a clean cloth,ICE STORAGE BIN wipe all interior surfaces of the ice machine and ice storage bin with the santizing solution.The interior liner of the bin is in contact with a food Immerse any small parts in the sanitizing solutionproduct: ice. The storage bin must be cleaned and wash the parts, flushing the solutionregularly to maintain a sanitary environment. thoroughly in, over and through all parts andOnce a week cleaning with soap and water, a hot surfaces of the parts being cleaned.water rinse and an air dry is a basic procedure. 3. Allow to air dry.Scale that may form on the plastic liner can beremoved by scrubbing the surface with a mixtureof Scotsman Ice Machine Cleaner and hot water.Remove any scale prior to sanitizing.To Remove Scale:1. Mix a cleaning solution of 4 ounces of ScotsmanIce Machine Cleaner to 4 pints of hot (950F. to1100F.) water.2. Using rubber gloves, dip a nylon scouring padinto the cleaning solution, and scrub the scale offof the liner. 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. In case of external contact, flush with water. KEEP OUT OF THE REACH OF CHILDREN.September 1993 Page 16

ADJUSTMENTS CMS1402Adjustment Of The Cube Size Control 2. Rotate the adjusting knob one-eighth of a turn COUNTER Clockwise.//////////////////////////////CAUTION//////////////////////////////////// 3. Observe size of ice cubes in next ice cube harvest and, if needed, adjust again until correctBEFORE adjusting the cube size control, check ice cube size is achieved.other possible causes for cube size problems,refer to Service Diagnosis section. DO NOTperform adjustment when a new cube size controlis installed until the control bulb has been properlyinstalled in the tube well, and the icemaker hasbeen through a complete freezing and harvestcycle.///////////////////////////////////////////////////////////////////////////////Adjustment of the cube size control is available tochange the cubes to the correct size, see INITIALSTART UP.To produce LARGER sized ice cubes:1. Locate the cube size control, on the front of thecontrol box.2. Rotate the adjusting knob one-eighth of a turnClockwise.3. Observe sAizDeJUofSiTcMeEcNubTeOsFinTHneExWt iAceTEcRubeharvest and, if neReEdGeUd,LrAeTpIeNaGt sVtAeLpV2Eabove untilcorrect ice cube size is achieved.To produce SMALLER sized ice cubes:1. Locate the cube size control, on the front of thecontrol box. September 1993 Page 17

CMS1402 To Adjust The Timer & Switch Assembly: The length of the harvest cycle can be changed byADJUSTMENTS loosening the set screw on the cam, and then rotating the shaft so that the opening between theAdjustment Of The Timer & Switch Assembly cams change. More of an opening between the cams = more harvest time. The harvest time may Electrcial power present be reduced if not needed. This will yield more ice in the control box can per day. cause personal injury. TIMER Disconnect power before begining to CAM adjust timer. ADJUSTING TIMEROne complete revolution of the cam on the timertakes eight minutes. The normal setting is threeand a half minutes, as set at the factory.lt is important that the length of the harvest cycleallow enough time for all the ice cubes to fall fromthe evaporator. Too short of a time will cause theevaporator to freeze up and stop ejecting ice intothe bin. Too much time wastes icemaking capacity,energy and water. Adjustment of the harvest cyclemay require a corresponding adjustment of thecube size control. Rotating the shaft of the timercam clockwise will allow putting the machine intoeither the freezing cycle or harvest cycle, asrequired in the cleaning instructions. MICROSWITCH CLOSE UP VIEW OF TIMER SWITCH ACTUATOR CAMSeptember 1993 Page 18

CMS1402SYSTEM SPECIFICATIONSThe following numbers can be used as a guideline . There will be some variation from unit to unit.Typical Cycle Time •14-16 minutes @ 70oF. air and 50oF. water; 17-18 minutes @ 90oF. air and 70oF. water.Typical Harvest Ice Weight •13-14 lbs.Typical Low Side Pressure •20-21 PSIG @ 70oF. air and 50oF. water •21-22 PSIG @ 90oF. air and 70oF. waterTypical Freeze Cycle Discharge Pressure •Air cooled: 280-240 PSIG @ 90oF. air/70oF. water; 210 PSIG @70oF. air/50oF. water by end of freeze. •Water Cooled = 220 PSIGRefrigerant Charge •Air Cooled = 60 ounces of R-22 •Water Cooled = 64 ounces of R-22Harvest Time •Preset at 3.5 minutes, may be adjusted to suit local conditionsTypical Suction Pressure in Harvest •60-70 PSIG @ 70oF. air and 50oF. water •70-80 PSIG @ 90oF. air and 70oF. waterTypical Discharge Pressure in Harvest •100-110 PSIG @ 70oF. air and 50oF. water •120-130 PSIG @ 90oF. air and 70oF. water.Typical Compressor Amp DrawSingle phase •Beginning freeze = 13-14, End of Freeze = 11-12, Harvest = 16-17Three phase •Three phase amps vary between 8 and 12High Pressure Cut Out •High pressure safety, (air cooled) Manual reset, cut out at 450 PSIG •High pressure safety, (water cooled), Manual reset, cut out at 350 PSIGFan Pressure Switch •210 PSIG cut in, 193 PSIG cut outCompressor •Copeland CRL3-0350-PFV-270 (single phase) •Copeland CRL3-0350-TF5-270 (three phase)Ice Level Control •Maximum Range = 8 feet •Partial Fill Setting:= 21\" - 22\" from the base of the ice machineTimer •1 revolution takes 8 minutesCube Size Control •Cut In adjustable between 0oF. and +250F. September 1993 Page 19

CMS1402SERVICE DIAGNOSIS: Electrical and/or AdjustmentsSYMPTOM POSSIBLE CAUSE PROBABLE FIXNothing operates Bin level control holding machine off Bin is full - use some ice.Makes thick ice/freezes up Check ice level control circuit, seeRuns, makes no ice page 22.Long freeze cycle No Power Reconnect powerCubes too smallCubes too large High pressure control open Reset, check machine High temperature cut out open Hot gas valve leaks thru, replace P. C. Board Open Replace board Master switch open Test/replace Timer contacts open Replace timer Harvest cycle too short Adjust timer Water inlet valve restricted Clean or replace valve Low water pressure Check water filter or supply Hot gas valve defective Replace hot gas valve Water reg. valve (water cooled) leaks Replace water reg. valve through Low refrigerant charge Locate leak, repair, replace drier, evacuate and weigh in nameplate charge. Air intake temperature too high (air Reduce room temperature cooled) Sump covers out of position Re-position sump covers Cubes too small Adjust cube size Cube size control stuck open Replace cube size control Pump problem or water leak in Check water system and pump reservoir Water inlet valve either lets in no Replace inlet water valve water or leaks through Low refrigerant charge Locate leak, repair, replace drier, evacuate and weigh in nameplate charge. Timer stuck Replace timer Relay does not energize; unit stuck in Replace relay harvest Water inlet valve leaks through Replace inlet water valve Dirty condenser Clean condenser Air intake temp. too high Reduce room temperature Water temperature too high Advise user Cube size set wrong adjust cube size Cubes size control stuck closed Replace cube size control Water inlet valve leaks through Replace inlet water valve and adjust cube size control September 1993 Page 20

CMS1402SERVICE DIAGNOSIS: Refrigeration and/or MechanicalSYMPTOM POSSIBLE CAUSE PROBABLE FIXPoor harvest Too short harvest time Check and adjust harvest time Restriction of incoming water Check supply, filter, strainer and valveUnit cycles off during freeze or Hot gas valve does not open Check for power to the coil, check forharvest not opening, replaceLow capacity Not enough refrigerant Locate leak, repair, replace drier, evacuate and weigh in nameplateUnit runs out of water Cube size too small charge.Unit shuts off before bin is full Hi temperature switch opens and Adjust with cube size controlUnit does not shut off closes Hot gas valve leaks thru, replace it Loose connection on PC board High head pressure, from dirty Check and replace P C board condenser, faulty fan motor, or fan Clean condenser, repair fan motor or control control Non condensable gas in the system Purge system, evacuate and weigh in Poor air circulation or extreme hot nameplate charge location Relocate the cabinet; or provide Overcharge of refrigerant ventilation Evacuate and weigh in nameplate Cube size too big, unit runs out of charge water before harvest Adjust cube size control Inlet water valve leaks thru Hot gas valve leaks thru Replace valve At the end of the freeze cycle there Reservoir leaks should be frost on the evaporator end Inlet water valve restricted of the hot gas tubes, if not replace the Short harvest cycle hot gas valve Water pressure too low Repair leak Something blocking transducer Clean or replace valve Transducer is wet Adjust timer Check supply Control set on partial Remove blockage Ice level control failiure Remove transducerand shake screen Timer stuck; does not turn dry. Set control to full. Check circuit, see next page. Replace timer September 1993 Page 21

CMS1402SERVICE DIAGNOSIS: Ice Level Control CircuitCONDITION DETERMINE CAUSE PROBABLE CORRECTIONIce Machine does not run, it haspower to it, the high pressure control A. Listen for a ticking sound from If no noise, go to C. If there is ais closed, the on/off switch is set to transducer. noise, check for a light on the boardON. (models built after 4/93). If there is a light on, check relay contacts N.O.Machine runs, makes ice, switches and COM. The contacts should beon and off, but ice level cannot be CLOSED. If closed, go to D. If not,controlled. replace the board. If light is off, orMachine runs, but will not shut off. prior model, go to B. B. Remove front panel(s), twist If the inside of the transducer (above transducer 1/4 turn and pull out. DO screen) was wet, replace it. Set bin NOT UNPLUG with power level to FULL and aim at an object connected. Examine the transducer, about 1-3 feet away. Machine should the inside must be clean and dry. restart, if not go to D. C. Check power to bin level control Should be 12 volts from transformer, board. if not replace transformer. If there is power go to D. D. Disconnect electrical power and If machine does not start go back to test ice machine circuit by attaching a machine circuit. If machine starts, jumper wire between bin thermostat disconnect electrical power, remove posts on circuit board part no. jumper wire and reconnect electrical 12-1912-01 (the circuit board with the power. Then go to E. timer on it). Reconnect power. E. Transducer or ice level board Replace transducer. Set bin level to assembly defective. FULL and aim at an object about 1-3 feet away. Machine should restart. If this does not repair unit, replace the board. Ice level switch may be defective. On Replace ice level switch boards with a light, check by moving switch & watching light. Board relay stuck closed. Check If COM and N.O. are closed when relay. power is off, replace board. If open, go to B above.PARTIAL VIEW PLUG - IN Electrical Shock Hazard OF CIRCUIT RELAY Can Cause Personal Injury. BOARD Disconnect Power Before 12-1912-01 BIN THERMOSTAT Servicing. Bin Thermostat Posts at TIMER September 1993 Line Voltage. Page 22 POSTS MENTIONED IN “D” ABOVE

REMOVAL AND REPLACEMENT CMS1402Water Distributor Tubes And Manifold Tubes Cube Size ControlTo remove the water distributor tube and manifold To remove the cube size control:tube:1. Remove the front panel. Electrical Shock Hazard.2. Slide the water distributor tube to the front about Electrical shock can1/8-inch along the top of the evaporator plate, until cause personal injury.the water distributor tube can be unsnapped from Disconnect powerthe flexible notch and lifted upward. before begining to service components DISTRIBUTOR TUBE 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 tube bulb from the tube well on the suction line. 5. Remove electrical leads from the cube size control. NOTCH IN CONTROL BOX3. Unsnap and disconnect water distributor tubes REMOVAL OF THE CUBE SIZEfrom the water manifold section. To replace the CUBE SIZE CONTROL CONTROLwater distributor tubes and manifold tubes, reversethe removal procedure. BE SURE the notches in 6. Remove screws and pull the capillary tubethe water manifold tubes properly engage the through the notch in the back of the control box.alignment keys in the tee. BE SURE the water Remove the cube size control. To replace the cubedistributor tube is securely fastened at the notch at size control, reverse the removal procedure.both sides of the evaporator plate. Check identicalattachment for the left water distributor tube andnotch; also, that the distributor/manifoldconnections at the top center of each evaporatorplate is snug against the top of the plate.September 1993 Page 23

CMS1402 Inlet Water Solenoid Valve Assembly To remove the inlet water solenoid valve assembly:REMOVAL AND REPLACEMENT 1. Shut OFF water supply to machine. 2. Loosen and remove outlet water line from the Electrical Shock inlet water solenoid valve assembly. Hazard. Electrical shock can INLET WATER VALVE cause personal injury. Disconnect power before begining to service componentsWater Pump STRAINER1. Remove front panel. 3. Remove screws and pull the water solenoid valve out to gain access.2. Unplug water pump electrical connection. 4. Pull electrical cord from solenoid coil terminals. 5. Remove inlet water fitting from the water3. Drain water reservoir. solenoid valve. To replace the inlet water valve assembly, reverse the removal procedures.4. Use corbin clamp pliers to loosen and slide Bin Ice Level Control Circuit Boardcorbin clamps on hoses away from pump. 1. Disconnect Electrical Power before removing circuit board.5. Remove screws retaining pump to bracket. 2. Remove front panel. 3. Remove control box cover.6. Pull pump out of ice machine. 4. Remove wires from circuit board connections. 5. Unlock circuit board fasteners by twisting 1/27. Reverse to reassemble. turn. 6. Pull circuit board of off fastener posts.8. Replace front panel. 7. Reverse to reassemble, refer to wiring diagram as needed.8. Reconnect electrical power.Transducer1. Disconnect electrical power BEFORE removingtransducer.2. Remove the front panel and locate thetransducer socket.3. Twist inner portion of transducercounter-clockwise and push up gently.4. Unplug transducer and remove from themachine.5. Reverse steps 1-4 to reassemble.September 1993 Page 24

REFRIGERATION SERVICE CMS1402General: •If gauges must be used, use very short hoses. •Scotsman recommends that any work on the Minimal refrigerant discharged into the hoses equals minimal refrigerant discharged into the refrigeration system only be done when it is air. certain that the system needs repair. •If hi side pressure must be checked, use a •Refrigerant should not be added except as a quick connect at the end of the discharge hose way to determine the proper operation of the to minimize the release of refrigerant, J/B product. If the system was low on refrigerant, Industires part number A33000 works well. there is a leak, and it must be found and repaired. •Scotsman’s schrader valve caps must be •Although this system uses R-22, it should not tightened to 70 inch - pounds to insure that the valves will not leak. be wasted to the atmosphere, but reclaimed. •If using recycled refrigerant, it must meet ARI •This system has a critical charge, it must be spec 700 or have been cleaned by a machine recharged with the correct amount of refrigerant capable of attaining ARI spec 700. as listed on the nameplate of the ice machine, or performance will suffer. If the refrigeration system must be serviced, the quality of service must insure that there will not be •Anytime the refrigeration system has been a repeat failure, as repeat failures will cause refrigerant to be discharged into the air by the opened, the dryer should be replaced. failure or when the failure is corrected: •When brazing the tubing connections to the hot •If there has been a compressor burn out, check gas valve or thermostatic expansion valve, the for acid in the oil. If acid is indicated, extra steps component must be protected by heat sink must be taken to clean up the system. material. •Never use refrigerant, such as R-11, to cleanSpecifically: up or flush out a refrigeration system. WhenRecover, reclaim or recycle refrigerant. The system clean-up is required, the use of suctionmethod chosen is up to the service company. line filter-dryers and liquid line filter-dryers areThere are various mechanical devices that may be recommended.used to recycle refrigerant at the field level,however, Scotsman requires that any refrigerant •Always replace the dryer when repairing a leakplaced into a Scotsman ice machine meet ARIspec 700. Reclaim programs are available thru or replacing a refrigeration component.most refrigerant wholesalers. •Evacuate the system with a good vacuumUse conservation minded service procedures: pump to 500 microns or less. If the triple •Refrain from checking refrigeration pressures evacuation method is used, the vacuum should be broken each time with dry nitrogen, not without reason. There are many ways to refrigerant. Evacuation must be from both sides determine the proper operation of a Scotsman of the system. ice machine without using refrigerant gauges. Visual inspection of the water system, •Weigh in or measure in the nameplate charge. observation of the ice formation, amp draw, voltage, and other techniques will lead to proper Recharge into the high side. diagnosis. Scotsman also recommends that, at the time of initial start up, gauges not be used. •Check for leaks with a high quality, electronic •If gauges must be used, do not always check leak detector. Halide torches will not locate the very small leaks. the high side pressure. If the condenser is clean and seems to be operating correctly, it most •Scotsman’s schrader valve caps must be likely is. The low side pressure is much more important on an ice machine than is the high tightened to 70 inch - pounds to insure that the side. valves will not leak. If an ice machine is to be discarded and still contains refrigerant, Scotsman recommends that the refrigerant be recovered, reclaimed, or recycled so that it is not discharged into the air.September 1993 Page 25