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10. For Heat Pump Units remove the capillary tube
only.
11. For Heat/Cool Units the filter drier is installed in
the liquid line, in place of the strainer. Trim the
saved liquid line tube from Step 9, to be 1.5 in. long
(saving the crimped portion), and braze it into the
filter drier, Part No. KH43LG060. See Figure 39.
For Heat Pump Units: A suction line filter drier
(Part No. Sporlan C-164S) is used and is installed
between the reversing valve and the com-
pressor accumulator. There are several suction
tube configurations and the suction line filter drier
will be field piped and brazed into the suction
tube for your unit. See Figure 40 for a general instal-
lation view.
12. Remove the grommets from the existing compressor
and install them onto the new compressor.
13. Install the new compressor and the new capillary
assembly (the correct capillary may be obtained
from Carrier RCD), into the unit.
14. Leak check the unit with 150 psi of nitrogen
pressure.
15. For 52S units, the system should be evacuated from
the high side to the low side to a minimum of
200 microns of mercury. This evacuation removes
residual moisture from the system prior to charging.
16. For Heat Pump Units: Recharge unit to the name-
plate refrigerant charge using a charging cylinder.
For Cooling Only and Heat/Cool Units: Add
one ounce of refrigerant to the nameplate charge to
compensate for the size of the liquid line drier.
17. Pinch off each access valve on the process tubes, in
2 places, using a pinch off tool such as Imperial tool
#105-FF or Robinair Tool #12294. Release any re-
frigerant pressure trapped in the access valve by
depressing the valve core, then confirm that no
R-22 is leaking past the pinch off tool location. Cut
the access valve stem of the process tube above
the top crimp and braze the top of each process tube
to ensure the system is sealed, (leave the pinch off
tool in place until after the brazing process is
complete).
18. Reassemble the unit by reversing steps1-9.
19. Connect the compressor wires and energize the unit
to verify operation.
Ⅲ REFRIGERANT CHARGING — Every mechanical
refrigeration system that is opened for servicing must
be accurately charged before it is returned to service.
Run the compressor ONLY after charging the system
with refrigerant. The compressor should never be
operated on air!
It is important to remember that recovered and/or re-
cycled refrigerant may only be recharged into the system
from which it was initially recovered, or another one
owned by the same customer. Charge level is important.
Charge units only as recommended by manufacturer.
FIGURE 39 — INSTALLED FILTER DRIER
FIGURE 40 — SUCTION LINE FILTER DRIER
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