Scotsman NM1250R User Manual

INTRODUCTIONTo the owner or user: The service manualyou are reading is intended to provide you,and the maintenance or service technician,with the inf

FOR THE ELECTRICIANCONFORM TO ALL APPLICABLE CODESThe electrical power to the unit issupplied through the junction box atthe rear of the machine.Check

FOR THE ELECTRICIANFAN RELAY KITTo install the KCMR230 fan relay kit whenusing (2) NM1250R icemakers and one 230volt, two circuit remote condenser.///

6. Check phasing of the electrical circuit asfollows:A. The phasing of the wiring MUST now bechecked, as incorrect phasing will result in afailure o

FOR THE INSTALLER: Completed InstallationROOFCUT-AWAYINSULATED PRECHARGEDREFRIGERANT TUBINGA typical installation should generally appearas illustrate

FOR THE INSTALLER: Final Check List1. Is the ice system installedindoors in a location where the airand water temperatures arecontrolled, and where th

START UPPre-Start Inspection1. Remove the front, left, and right sideservice panels.2. Check that the styrofoam shipping blocksunder the gearmotor, on

COMPONENT DESCRIPTIONControl Box: Contains the electrical controlsthat operate the machine.High Pressure Cut Out (control): A manualreset switch sen

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

ELECTRICAL SEQUENCERefer the wiring diagram as needed.If the machine is switched off at the masterswitch, but is otherwise ready to go, switchingthe m

OPERATIONWaterWater enters the machine through the 3/8"male flare at the rear of the cabinet, goes tothe water reservoir which it enters through

The NM1250R is designed to fit the followingScotsman storage bins:B590 and extensions (with bin top KBT18)HTB500 or BH500BH800 using bin top KBT15BH10

OPERATION: Beginning at the compressor, the refrigerant502 is compressed into a high temperaturegas. The discharge line directs this gas to theconden

OPERATION: RefrigerationLOW CONDENSING TEMPERATUREThe refrigeration system under low condenserair temperatures is much the same as it isunder higher t

OPERATION: RefrigerationPUMP DOWNDuring the pump down cycle (usually initiatedby the circuit board de-energizing the liquidline valve) the discharge g

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

ICEMAKER MAINTENANCE:////////////////////////////WARNING/////////////////////////////Disconnect electrical power before begining./////////////////////

////////////////////////////WARNING/////////////////////////////Disconnect electrical power before begining.//////////////////////////////////////////

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

G. Check: The gear motor, if it will not run, the compressor will not run. If no power to it: Check:the indicator lights on the circuit board, the bi

STATUS: GEARMOTOR OPERATES, COMPRESSOR DOES NOTA. Check the pump down control switch.1. This pressure switch opens at 6-10 psig, and closes at 16-20 p

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

Installation Limitations:This ice system is designed to be installed indoors,in a controlled environment:Min MaxAir Temperature 500F 1000FWater Tempe

SERVICE DIAGNOSIS: Condition - Low Ice ProductionI. STATUS: EVERYTHING IS OPERATINGA. Check the condenser for dirt. Clean as required. Check the head

WATER RESERVOIR1. Shut off the water supply to the icemaker.2. Remove front panel and reservoir cover.3. To remove float only, pry the mountingflange

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

To Remove the Auger:Turn off the water to the machine, and unclipthe evaporator drain hose, pull it down anddrain the evaporator 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 willhave to be pulled away

To Reassemble the Evaporator and Auger1. After the gearmotor has been inspected,fasten the evaporator to the gear motor, besure that the number of shi

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

WATER SHEDSHIMSCENTRIFUGALSWITCHDRIVE MOTORMOTOR BEARINGSHAFT SEAL1ST GEAR ANDBEARINGS2ND GEAR ANDBEARINGSGASKETGEARCASEGEARCASE COVER,OUTPUT SHAFT,OU

INSTRUCTIONS FOR USING TESTER MODEL FC1 (Optional, order part no. A33942-001)(These instructions assume that the unit will not run, and prior investi

Water Level1. Unplug "water sen" connector from controlboard.2. Plug "water sen" connector from Scotsmantester into circuit boar

1/2" MALE QUICK CONNECTCOUPLING FOR USE WITH RT625OR RT640 PRECHAGED LINE SETLIQUID LINE 3/8" MALE QUICK CONNECTCOUPLING FOR USE WITH RT625

Location:After uncrating and inspection, the unitis ready for installation. It is importantthat the machine be installed in alocation where it has en

FOR THE INSTALLER: Remote Condenser InstallationLocation:Limited to a 40 foot or a 25 foot length ofprecharged refrigerant tubing connecting theicemak

COUPLING INSTRUCTIONS///////////////////////////CAUTION//////////////////////////////The couplings on the sets of precharged linesare self sealing whe

////////////////////////////WARNING/////////////////////////// ELECTRICAL POWER MUST BE OFFWHEN CONNECTING WIRES/////////////////////////////////////

FOR THE PLUMBERCONFORM TO ALL APPLICABLE CODESWater InletThe recommended water supply is cold water.Use 3/8" O.D. copper tubing, connect to the3