Evaporator - Scotsman NM650 Service Manual

NM650
REMOVAL AND REPLACEMENT: Evaporator
///////////////////////////////////////////////////////////////////////////WARNING////////////////////////////// //////////////////////////////////
Disconnect electrical power before begining removal procedures.
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To Replace the Evaporator:
(Assuming all the steps for removal of the
thrust bearing, breaker, auger, and water seal
have been performed.)
1. Discharge the refrigerant from the ice
maker.
2. Unsweat the refrigerant connections:
a) At the thermostatic expansion valve outlet.
//////////////////////////////CAUTION///////////////////////////
Heat sink the TXV body when unsweating
or resweating the adjacent tubing.
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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"
ICE CHUTE
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.
BEARING
BREAKER
January, 1991
Page 28
ICE SWEEP

EVAPORATOR

AUGER