Service manual

6-9
T-294-01
6.8 COMPRESSOR -- MODEL 06DR
WARNING
Make sure power to the unit is OFF and
power plug disconnected before replacing
the compressor.
NOTES
S The compressor should not operate in a
vacuum greater than 500 mm Hg (20 inches
Hg).
S The service replacement compressor is
sold withoutterminalboxandcover.C ustom er
should retain the original terminal box, cover,
andhighpressureswitchforuseon
replacement compressor.
S Check oil level in service replacement
compressor. (Refer to sections 2.2 and 6.11. )
S A compressor terminal wiring kit must be
ordered as a separate item when ordering
replacement compressor. Appropriate
installation instructions are included with kit.
S Refer to Table 6-7 and Table 6-8 for
applicable compressor wear limits and torque
values.
S Refer to Figure 6-37 for charts on
compressor pressure-temperature.
6.8.1 Removal and Replacement of Compressor
a. Removethe protectiveguard fromlowersectionof
the unit.
b. Remove all refrigerant using a refrigerant recovery
system. (Refer to section 6. 4)
c. Locate the compressor junction box. Remove
wiring. Disconnect wiring from compressor
terminals and remove compressor junction box.
d. Remove bolts from suction and discharge flanges.
e. Remove compressor plate mounting bolts.
f. Remove compressor and mounting plate. Refer to
section 2.2 for weight of compressor.
g. Remove high pressure switch (HPS) from
compressor and check operation of switch (refer to
section 6.13.2).
h. Remove compressor mounting bolts from
mounting plate and install mounting plate on
replacement compressor.
123
4
5
6
78
10
11
12
13
14
15
9
1. Discharge Flange
2. High Side Pressure Connection
3. Low Side Pressure Connection
4. Suction Flange
5. Motor End Cover
6. Serial/Model No. Plate
7. Crankcase Heater (Optional)
8. Bottom Plate
9. Sight Glass
10. Oil Drain Plug
11. Bearing Head
12. Oil Pump
13. Oil Fill Plug (Refer to section 6.11)
14. Cylinder Head
15. Valve Plate
Figure 6-6. Compressor -- Model 06DR
i. Installreplacement compressorterminal wiringkit,
following instructions included with kit.
j. Install high pressure switch on compressor.
k. Install compressor and m ounting plate in unit.
l. Connect junction box(es) to compressor and
connect all wiring per wiring diagram. Install
junction box cover(s).
m. Install new gaskets on suction and discharge
flanges.
n. Installmountingboltsinserviceportandtorquetoa
value of 2.77 to 4.15 mkg (20-30 ft/lb).
o. Install a new filter-drier. (Refer to section 6.12)
p. Attach manifold gauge set (with hand valves near
vacuum pump) to the liquid line and suction line
process tubes. Dehydrateand evacuate compressor
to500m i crons(75.9cmHgvacuum=29.90inches
Hgvacuum).T urnoffvalvesonbothhosestopump.
q. Fullybackseat(open)bothhandvalvesofmanifold
gauge set.