Scotsman NM952 Service Manual

INTRODUCTIONTo the owner or user: The service manual you arereading is intended to provide you, and themaintenance or service technician, with theinfo

COMPONENT DESCRIPTION: Control BoxContactor: A definite purpose contactorconnecting the compressor and the remotecondenser fan motor to the power su

COMPONENT DESCRIPTIONEvaporator: A refrigerated vertical tube filled withwater and containing a water seal and auger.Auger: A solid stainless steel

ELECTRICAL SEQUENCERefer the wiring diagram as needed.If the machine is switched off at the master switch,but is otherwise ready to go, switching the

OPERATION: WaterWater enters the machine through the 3/8" maleflare at the rear of the cabinet, goes to a strainerand then to the water reservoir

OPERATION: RefrigerationBeginning at the compressor, the refrigerant iscompressed into a high temperature gas. Thedischarge line directs this gas to

MAINTENANCE AND CLEANING//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

1. The bin control uses devices that sense light,therefore they must be kept clean enough so thatthey can “see”. At least twice a year, remove thebin

5. Clean the air cooled condenser.The air flow on this model is from front to back, sothe inside of the machine will have to be availableto clean the

In some areas, the water supply to the ice makerwill contain a high concentration of minerals, andthat will result in an evaporator and augerbecoming

SERVICE DIAGNOSIS: Condition - No Ice Being ProducedSTATUS: NOTHING OPERATESA. Check: Voltage to the unit, restore it if there is none. Compare to the

FOR THE INSTALLERThe NM952 is designed to fit the followingScotsman storage bins:B90 and extensions (with bin top KBT18)BH800 using bin top KBT15 (one

SERVICE DIAGNOSIS: Condition - No Ice Being ProducedSTATUS: NOTHING OPERATESH. Check: The gear motor, if it will not run, the compressor will not run.

STATUS: GEARMOTOR OPERATES, COMPRESSOR DOES NOTA. Check the compressor relay.The relay is on the circuit board, if it does not supply power to the con

SERVICE DIAGNOSIS: Condition - Low Ice ProductionSTATUS: EVERYTHING IS OPERATINGA. Check the air cooled condenser for dirt. Clean as required. Check

WATER RESERVOIR1. Shut off the water supply to the ice maker.2. Remove front panel and reservoir cover.3. To remove float only, pry the mounting flang

REMOVAL AND REPLACEMENT: Bearing And BreakerNote: Removal of the auger, water seal,evaporator and gearmotor must begin at the top ofthe assembly.1. Re

To Remove the Auger:Turn off the water to the machine, and unclip theevaporator drain hose, pull it down and drain theevaporator into the bin or a con

To Remove the Water Seal: (Assuming all steps to remove the auger havebeen performed.)1. The gearmotor/evaporator assembly will have tobe exposed.2. R

To Replace the Evaporator:(Assuming all the steps for removal of the thrustbearing, breaker, auger, and water seal have beenperformed.)1. Discharge th

To Remove and Repair the GearmotorAssembly:(Assuming that the procedures throughremoval of the water seal have beenperformed.)1. Remove the electrical

Removal and Replacement: Refrigeration SystemGeneral:••Scotsman recommends that any work on therefrigeration system only be done when it iscertain tha

FOR THE INSTALLERScotsman Ice Systems are designed andmanufactured with the highest regard for safetyand performance. They meet or exceed thestandards

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Water Level1. Unplug “water sen” connector from controlboard.2. Plug “water sen” connector from Scotsmantester into circuit board.a. Move “water” sw

FOR THE INSTALLER: LocationTWO UNITS ON ONE BINALLOW ROOMFOR AIRCIRCULATIONAND SERVICEACCESSDO NOT STACK ANYTHING INFRONT OF THE MACHINE(S)NM952August

FOR THE PLUMBERCONFORM TO ALL APPLICABLE CODESWater InletAir Cooled Models: The recommended watersupply is clean, cold water. Use 3/8" O.D. copp

FOR THE ELECTRICIANCONFORM TO ALL APPLICABLE CODESThe electrical power to the unit is supplied throughthe junction box at the rear of the machine.Chec

FOR THE INSTALLERFinal Check List1. Is the ice system installed indoors in a locationwhere the air and water temperatures arecontrolled, and where the

START UPPre-Start Inspection1. Remove the front and side service panels.2. Check that the styrofoam shipping blocks havebeen removed.3. Inspect the i

COMPONENT DESCRIPTIONControl Box: Contains the electrical controls thatoperate the machine.High Pressure Cut Out Switch: A manual resetswitch sensing