Carrier 26H - Manual (Page 31)

Carrier S E R V I C E 26H
6. Remove the compressor terminal box cover
and disconnect the compressor motor connec­
tions. Mark connections so they may be cor­
rectly reconnected to the replacement com­
pressor.
7. Remove the cotter pins and castellated nuts
from the top of the compressor mounting bolts.
8. Lift the compressor from the unit.
9. Seal all openings on the compressor to pre­
vent moisture from entering prior to repair or
exchange.
10. If compressor failed due to motor burnout, see
"Replacement After Motor Burnout ".
11. Install the replacement compressor. Place
new gaskets between all shutoff valves and
the compressor flanges.
12. Make sure the oil level in the replacement
compressor approximates oil level in the
compressor removed.
13. After completing the piping and wiring, evacu­
ate and purge the replacement compressor as
described in Section 3.
14. Backseat all valves and start unit.
15. After operating for at least 2 cycles, check
the refrigerant charge as described in Sec­
tion 4.
16. Check for leaks. Use a halide torch, soap
bubble method or both.
REPLACEMENT AFTER MOTOR BURNOUT
When a hermetic motor compressor burns out, the
stator winding insulation decomposes - forming
carbon, water and acid. To prevent contamination
of the refrigerant system by these products of com­
bustion, the refrigerant circuit must be cleaned
when installing a new compressor.
The procedure for cleaning the system is as follows:
1. Disconnect water supply line and. drain the
water from the condenser, to prevent con­
denser freeze-up during purging.
2. Purge refrigerant charge.
3. Remove strainer-drier from liquid line,
liquid line for 1/4" SAE connections.
Flare
4. Install Sporlan Catch-.'\11 Type C-162 Strainer-
Drier. The 1/4" liquid line coming from near
bottom of condenser should be fastened to the
inlet side of the Sporlan Catch-All. Direction
of arrow should be pointing upwards.
5. Install new compressor.
6. Evacuate the entire system as described in
Section 8 and add refrigerant as described in
Section 4.
The Sporlan Catch-All can be left in the refrigerant
circuit. In addition to drying the refrigerant in the
system, the molded, porous core of the Catch-All
will catch all scale, solder particles, carbon,
sludge, dirt or any other foreign matter with negli­
gible pressure drop.
7. LIQUID-SUCTION INTERCHANGER AND
ACCUMULATOR REPLACEMENT
26H3
a. Open the disconnect switch.
b. Remove all panels.
c. Slowly bleed the system to the stmosphere as
described in Section 8.
d. Front seat both the suction and the discharge
valves.
e. Unscrew the flare nut at the suction service
valve.
f. Unscrew the flare nut attaching the capillary to
the drier and loosen the clamp holding the capil­
lary adapter to the frame.
g. Unsweat the capillary at the top of the evapo­
rator. The evaporator shroud will not telescope
the way it does on the 26H5. Be careful when
using a torch near the evaporator as the evapo­
rator tubes are soft soldered to the freezing
columns.
h. Unsweat the suction line at the evaporator.
Refer to sections 8 and 4 for evacuating and
recharging instructions.
31 26H-57PD