Carrier 52S manual REFRIGERANT CHARGING Ð Every mechanical, Ð Installed Filter Drier

10.For Heat Pump Units remove the capillary tube only.

11.For Heat/Cool Units the ®lter 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 ®lter drier, Part No. KH43LG060. See Figure 39.

For Heat Pump Units: A suction line ®lter 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 con®gurations and the suction line ®lter drier will be ®eld 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 con®rm 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 steps 1 - 9.

19.Connect the compressor wires and energize the unit to verify operation.

REFRIGERANT CHARGING Ð 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 Ð INSTALLED FILTER DRIER

FIGURE 40 Ð SUCTION LINE FILTER DRIER

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