Scotsman NSE650 User Manual Download Page 27 | Manualshive

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ICE SWEEP

AUGER

EVAPORATOR

BREAKER

BEARING

WATER

SEAL

RETAINING

RING

DRIP PAN

GASKET

WATER SHED

GEARMOTOR

ASSEMBLY

SEAL(S)

O-RING

CAP SCREW

O-RING

WATER

SHED

LIP SEAL

BREAKER

COVER

O-RING

AUGER STUD

REMOVAL AND REPLACEMENT: Evaporator

NSE650

August 1993

Page 27

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Summary of Contents for NSE650

Page 1: ...6 START UP 7 COMPONENT DESCRIPTION 8 ELECTRICAL SEQUENCE 11 OPERATION Water 12 OPERATION Refrigeration 13 TECHNICAL CHARACTERISTICS 14 MAINTENANCE AND CLEANING 15 SERVICE DIAGNOSIS Condition No Ice Be...

Page 2: ...ne air or water cooled All kits legs and information required for the specific job Max Fuse Size Refrigerant Charge R 404a Model Number NSE650AE 1A NSE650WE 1A Dimensions w o legs H x W x D 37 5 x 38...

Page 3: ...clog sooner than course ones It may be necessary to add a course filter ahead of the fine filter to prolong filter life 2 Check with a water treatment specialist for a water test and recommendations...

Page 4: ...ve to control it It is connected to a 3 8 FPT condenser inlet at the back of the cabinet The water pressure to all lines must always be above 20 psig and below 80 psig Drains Air Cooled Models There a...

Page 5: ...y The machine requires a solid chassis to earth ground wire The ice maker should be connected to its own electrical circuit so it would be individually fused Voltage variation must remain within desig...

Page 6: ...Have all the plumbing connections been made and checked for leaks 4 Has the machine been leveled 5 Is there a minimum of 6 clearance at the back and left side of the machine for proper service access...

Page 7: ...n and warm water will be discharged into the drain 5 The unit should soon be making ice if desired the low side pressure can be checked it should be 34 psig or 4 psig The suction line temperature at t...

Page 8: ...f Will shut the machine off it there is none Ice Discharge Chute Directs the ice produced by the evaporator into the storage bin Ice Level Sensor An electronic eye it senses the presence of ice in the...

Page 9: ...ns off and for the compressor Transformer Supplies low voltage to the circuit board Low Pressure Cut Out Switch A manual reset control that shuts off the ice machine when the low side pressure drops b...

Page 10: ...being where the two seal faces meet Ice Sweep A plastic cap with fingers It revolves with the auger to sweep the ice into the ice chute Breaker Where the ice is compressed and much of the extra water...

Page 11: ...ts down Shut Down consists of The compressor relay opens The compressor contactor opens The compressor stops The auger motor is run by the circuit board for 2 more minutes clearing out ice in the evap...

Page 12: ...enters the fitting at the rear goes to the water regulating valve then to the water cooled condenser and down the drain The storage bin has a separate drain tube and drain fitting EVAPORATOR DRAIN WAT...

Page 13: ...nt depending upon the temperature of the evaporator warmer evaporators get more refrigerant and colder evaporators get less At the evaporator the refrigerant enters an area of relatively low pressure...

Page 14: ...ir cooled 245 PSIG water cooled Typical Gearmotor Amp Draw 3 1 3 6 Typical Compressor Amp Draw 8 5 to 9 1 Typical Superheat 7 to 9 degrees Water Level Sensor Thermistor in the reservoir Bin Control El...

Page 15: ...hould be between 90 115 degrees F 8 Slowly pour the cleaning solution into the water reservoir until it is full Wait 15 minutes then switch the master switch to ON 9 As the ice maker begins to use wat...

Page 16: ...at least two times per year A Check the bearing by removing the ice chute cover unscrewing the ice sweep removing the water shed unscrewing the breaker cover unscrewing the auger stud Inspect the ass...

Page 17: ...screw and remove ice sweep 5 Remove ice chute from evaporator 6 Remove 4 allen screws holding breaker to evaporator 7 Pull up to remove auger After the auger has been removed allow the auger to dry if...

Page 18: ...k for a Thermostatic Expansion Valve that does not open if defective replace it Replace the drier evacuate and weigh in the nameplate charge E Check the high pressure cut out if closed go to F if open...

Page 19: ...light on the tester should be ON if not replace the circuit board If the bin full light on the tester is ON move the tester switch to bin empty the light on the tester should go OFF and the bin empty...

Page 20: ...oil is open replace the contactor 3 Check the auger drive motor centrifugal switch If when the drive motor is running contact 4 black wire removed has no power and all of the above switches have been...

Page 21: ...ater leaks replace the water seal if found to be leaking 3 Check the low side pressure normal is about 34 psig If low assume a refrigerant leak locate repair and recharge If no leak the TXV may be res...

Page 22: ...aker 9 Reverse to reassemble BIN CONTROLS Ice Level Sensors 1 Disconnect electrical power 2 Remove front panel 3 Remove control box cover 4 Locate ice chute at the base of the chute in front of and be...

Page 23: ...ck for rust rough spots and damage a The bearing is pressed into the breaker to remove the bearing and replace it an arbor press is needed b Replace lower seals before installing new bearing in breake...

Page 24: ...up remove breaker from evaporator e If the auger is stuck use a slide hammer type puller to pull on the auger at the threaded hole The size of that hole is 5 8 18 Inspect the auger the critical areas...

Page 25: ...with the auger must also be replaced Remove the old part from the auger and clean the mounting area 4 Place a small bead of food grade silastic sealant such as 732 RTV or Scotsman part number 19 0529...

Page 26: ...ew drier in the liquid line 7 Evacuate the system until dehydrated then weigh in the nameplate charge Check for leaks 8 Install auger breaker breaker bearing assembly and ice discharge chute in revers...

Page 27: ...AKER BEARING WATER SEAL RETAINING RING DRIP PAN GASKET WATER SHED GEARMOTOR ASSEMBLY SEAL S O RING CAP SCREW O RING WATER SHED LIP SEAL BREAKER COVER O RING AUGER STUD REMOVAL AND REPLACEMENT Evaporat...

Page 28: ...rings They are likely to be fine if the oil is If there is evidence of water in the oil rusty bearings and gears the oil having a creamy white appearance oil level too high carefully inspect the beari...

Page 29: ...chine must meet ARI spec 700 88 Reclaim programs are available through most refrigerant wholesalers Access Valves To use the access valves Remove the cap from the stem use a 3 16 allen wrench to check...

Page 30: ...repaired This system has a critical charge it must be recharged with the correct amount of refrigerant as listed on the nameplate of the ice machine or performance will suffer Anytime the refrigerati...

Page 31: ...hes reset 1 Unplug photo trans and LED connectors from the circuit board 2 Plug photo trans and LED connectors from the tester into the circuit board a Move the bin full switch on the tester to Full T...

Page 32: ...board should go ON If not replace the circuit board b Move the water switch on the tester to the Water position The No Water light on the board should go OFF If not replace the circuit board If the li...

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