Scotsman Ice NME654 Removal and Replacement Evaporator, Heat sink the TXV body when unsweating or

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NME454, 654 & FME504, 804

REMOVAL AND REPLACEMENT: Evaporator

To Replace the Evaporator:

 

To Reassemble the Evaporator and Auger

(Assuming all the steps for removal of the thrust

1. After the gearmotor has been inspected, fasten

bearing, breaker, auger, and water seal have been

the evaporator to the gear motor, be sure that the

performed.)

 

number of shims indicated on the gear case cover

1.

Recover the refrigerant from the ice maker.

is in place between the gearcase cover and the

2.

Unsweat the refrigerant connections:

drip pan gasket. Torque the bolts to 110 inch

pounds.

a) At the thermostatic expansion valve outlet.

2. Lower the auger into the evaporator barrel,

 

 

 

Heat sink the TXV body when unsweating or

slightly turning it to match up with the drive end. Do

Not Drop Into the Evaporator.

resweating the adjacent tubing.

 

 

3. Complete the reassembly by reversing the

 

 

 

b) At the suction line at the joint about 3" from the

disassembly for the breaker & thrust bearing

assembly.

evaporator.

 

 

 

3.

Remove the evaporator.

 

 

4.

Unsweat the drier from the liquid line.

 

5.

After installing a new water seal in the new

 

evaporator (see “To Replace the Water Seal”)

 

sweat in the new evaporator at the old tubing

 

connections.

 

 

6.

Install an new drier in the liquid

 

 

line.

 

ICE SWEEP

7.

Evacuate the system until

ICE CHUTE

 

 

 

dehydrated, then weigh in the

EVAPORATOR

 

nameplate charge. Check for leaks.

 

8. Install auger, breaker, breaker bearing assembly, and ice discharge

chute in reverse order of

BREAKER

 

disassembly. See “To Reassemble

 

Evaporator and Auger”

 

AUGER

BEARING

NME Components

Shown, FME similar.

January 2007

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Contents Introduction NME454, 654 & FME504Installation Limitations For the InstallerNME654 Dispenser Applications Fuse Charge Ampacity Size 404ASample BIN and Machine Combinations Water Limitations LocationAirflow Notice For the Installer LocationUse only ¾ rigid tubing For the PlumberFor the Electrician Final Check List Initial Start UP There are no Adjustments to MAKE, so replace the panelsComponent Description Low Pressure Cut Out SwitchNME454, 654 & FME504 AutoSentry Control Board On/Off mode Switch Manual control forControl BOX Components Start Up Electrical SequenceShut Down Control Board Protection DevicesWater Level The correct water level should be Operation WaterOperation Refrigeration Refrigeration SchematicOperation Performance Sanitizing Cleaning & SanitizingICE Making System In place cleaning Sensor Maintenance Hazardous Moving Parts AIR Cooled MaintenanceClean the air cooled condenser At least two times per year Bearing MaintenanceOff Auger Maintenance Symptom Possible Cause Probable Correction Service DiagnosisSymptom Possible Cause Probable Correction Control System Diagnostics BIN Controls Ice Level Sensors Removal and Replacement Bin Controls To Remove the Breaker Bearing Assembly Removal and Replacement Bearing And BreakerTo Remove the Auger Removal and Replacement AugerAuger is Stuck,To Replace the Water Seal Removal and Replacement Water SealTo Remove the Water Seal Resweating the adjacent tubing Removal and Replacement EvaporatorHeat sink the TXV body when unsweating or Removal and Replacement Gear Reducer and Motor Instructions for Liquid Charging R-404A Refrigeration System ServiceAccess Valves To use If the machine is off, not making ice What to do Before Calling for Service
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