Removal and replacement: evaporator – Scotsman NME454 User Manual
Page 29
To Replace the Evaporator:
(Assuming all the steps for removal of the thrust
bearing, breaker, auger, and water seal have been
performed.)
1. Recover the refrigerant from the ice maker.
2. Unsweat the refrigerant connections:
a) At the thermostatic expansion valve outlet.
Heat sink the TXV body when unsweating or
resweating the adjacent tubing.
b) At the suction line at the joint about 3" from the
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.
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 reverse order of
disassembly. See “To Reassemble
Evaporator and Auger”
To Reassemble the Evaporator and Auger
1. After the gearmotor has been inspected, fasten
the evaporator to the gear motor, be sure that the
number of shims indicated on the gear case cover
is in place between the gearcase cover and the
drip pan gasket. Torque the bolts to 110 inch
pounds.
2. Lower the auger into the evaporator barrel,
slightly turning it to match up with the drive end. Do
Not Drop Into the Evaporator.
3. Complete the reassembly by reversing the
disassembly for the breaker & thrust bearing
assembly.
NME454, 654 & FME504, 804
January 2007
Page 29
ICE SWEEP
AUGER
EVAPORATOR
BREAKER
BEARING
ICE CHUTE
NME Components
Shown, FME similar.
REMOVAL AND REPLACEMENT: Evaporator