145
11. Using a tubing cutter, cut the suction and discharge lines
in an area of the manifold that can be reconnected with a
coupling.
12. Carefully remove the compressor from the unit. All com-
pressors must be lifted by the lifting rings. Use care and
extreme caution when lifting and moving compressors.
13. The replacement compressor will come with an oil
charge. If the compressor will be mounted in a tandem or
trio compressor circuit, the oil must be drained below the
connection point. Be sure to measure the amount of oil re-
moved and replace it with new oil once the assembly is
complete. In tandem compressor applications, while con-
necting the oil equalizer line, it is recommended that the
compressor be tipped back approximately 12 degrees
from the horizontal to move the oil away from the fitting
so any remaining oil moves away from the oil equalizer
connection point.
14. Before moving the compressor into its final location, in-
stall the mounting grommets on the compressor.
15. Carefully move the compressor into place on the unit.
All compressors must be lifted by the lifting rings. Use
care and extreme caution when lifting and moving com-
pressors.
16. Secure the compressor using the mounting hardware re-
moved in Step 10. Tighten mounting hardware to torque
values listed in Table 65.
17. Using new fittings and tubing, reconnect the suction and
discharge lines. In tandem compressor circuits, the oil
equalizer line for the new compressor should be as close
to the original as possible. Make the connections using
proper service techniques. In trio compressor circuits, re-
connect the oil equalizer line. Be sure to use a new O ring
to make the connection. Proper torque values are listed in
Table 65.
18. Replace the liquid line filter drier.
19. If the compressor failure was as a result of a motor burn,
install a suction line filter drier. This device must be re-
moved after 72 hours.
20. Leak check all braze connections and repair if necessary.
21. Evacuate the circuit using proper service techniques.
22. Knock the same holes out of the new compressor junction
box, if required, and install the cable connectors from the
old compressor.
23. Install the crankcase heater on the compressor as de-
scribed in the section Crankcase Heater Mounting on
page 146 and wire the crankcase heater as described in
the same section. Crankcase heater position is critical to
proper operation.
24. For compressors with the motor protection module, wire
the power wiring and control wiring as shown in Fig. 168.
Be sure the correct motor protection module is installed.
Copeland replacement compressors can be shipped with
one of two motor protection modules, Kriwan or Core-
Sense communication module. Replacement compres-
sors shipped with Kriwan motor protection modules are
shipped with two solid-state motor protection modules. A
120/240-volt module is installed and a 24-volt module is
shipped with the compressor. Replacement compressors
with CoreSense modules are shipped with a voltage spe-
cific solid-state motor protection module. The 38AP units
require the 24-volt module be field installed. Failure to in-
stall the 24-volt module will result in a compressor failure
alarm. For compressors without a motor protection mod-
ule, install the motor plug by hand only. See Fig. 167.
Table 65 — Compressor Fastener Recommended
Torque Values
WARNING
All compressors must be lifted by the lifting rings. Use care
and extreme caution when lifting and moving compressors
to avoid personal injury and equipment damage.
NOTE: See wire color codes in
Crankcase Heater Wiring sec-
tion, page 146.
Fig. 168 — Compressor Junction Box With Motor
Protection Module
Fig. 169 — Digital Unloader Solenoid Valve
CAUTION
The molded electrical plug should be installed by hand to
properly seat the plug on the electrical terminals. To avoid
damage, the plug should not be struck with a hammer or
any other device.
FASTENER RECOMMENDED TORQUE
COMPRESSOR SLED
MOUNTING BOLTS
7 to 10 ft-lb (9.5 to 13.5 N-m)
COMPRESSOR MOUNTING
BOLTS
7 to 10 ft-lb (9.5 to 13.5 N-m)
COMPRESSOR POWER
CONNECTIONS
24 to 28 in.-lb (2.7 to 3.2 N-m)
COMPRESSOR GROUND
TERMINAL CONNECTION
14 to 18 in.-lb (1.6 to 2.0 N-m)
TRIO COMPRESSOR
ASSEMBLY OIL EQUALIZER
CONNECTION
74 to 81 ft-lb (100 to 110 N-m)
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