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NU130
Service
Compressor replacement.
Note: If built in the unit will need to be pulled out.
1
Shut off water supply
2
Disconnect power supply or unplug unit
3
Uninstall unit and pull out as needed for side
and back access.
4
Remove all panels and door:
•
Back panel including drain and power supply
panels.
•
Side service panel
•
Kickplate
•
Top panel
5
Go through all steps to remove drain pump
and/or fan motor.
6
Remove drain hose from unit.
7
Obtain or make an 11" prop from 3/4" PVC or
similar.
8
Remove 2 screws (at back) holding base to
side panels
9
Remove screws holding strut to base
10 Remove screw holding left side panel to base
11 Loosen BUT DO NOT REMOVE
two screws at front holding side
panels to base
12 Lift back of unit up and support
with the 11" prop.
Prop
Strut
Step10
July 2011
Page 20
Note: Placing it over the leg leveler and next to the
strut works the best.
13 Add temporary refrigeration system access
valves to the discharge and suction sides of the
refrigeration system.
14 Recover the refrigerant.
15 Remove the four hair pins securing compressor
to chassis.
16 Disconnect wires, overload and and relay from
compressor.
17 Push back suction line insulation.
18 Unsweat the discharge and suction
connections at the compressor.
19 Remove the compressor from the unit.
20 Remove dryer from unit.
21 Attach permanent schrader access valves to
unit.
22 Attach dry nitrogen supply to access valves,
purge at about 1 lb pressure during brazing.
23 Install new dryer.
24 Install new compressor. Install at least 3 of the
hair pins to secure the compressor. The fourth
is optional.
25 Make all braze connections needed to seal
system.
26 Remove nitrogen supply. Evacuate system to
at least 300 microns.
27 Weigh in nameplate charge.
28 Reconnect all wires, components and panels
removed to access compressor.
29 Reinstall unit. Operate unit and test.
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