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9) Remove the drier, then place the new drier in position.
11) Remove plugs from the suction, discharge, and process pipes.
12) Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG.
See "V.A.2. Brazing."
13) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of
refrigerant to the system (if using an electronic leak detector), and then raise the
pressure using nitrogen gas (140 PSIG). DO NOT use R-134a as a mixture with
pressurized air for leak testing.
14) Evacuate the system, and charge it with refrigerant. See "V.A.3. Evacuation and
Recharge (R-134a)." See the nameplate for the required refrigerant charge.
15) Connect and secure the compressor electronic unit to the new compressor.
16) Replace the panels in their correct positions.
17) Plug the unit back in. Move the power switch to the "ON" position.
18) Close the front panel.
C. Removal and Replacement of Compressor Electronic Unit
CAUTION! Do not attempt to repair the compressor electronic unit.
1) Raise the front panel, then move the power switch to the "OFF" position and unplug the
unit.
2) Remove the rear panel.
3) Loosen the 2 screws securing the compressor electronic unit to the compressor. See
Fig. 3. Remove the electronic unit from the compressor.
4) Remove the wire cover from the compressor electronic unit, then disconnect the wires
from the compressor electronic unit.
5) Remove the wire cover from the new compressor electronic unit and connect the wires.
Replace and secure the wire cover.
6) Secure the new electronic unit to the compressor.
7) Replace the rear panel in its correct position.
8) Plug the unit back in. Move the power switch to the "ON" position.
9) Close the front panel.
Variable Speed Compressor
Compressor Electronic Unit
Fig. 3
Electronic Unit
Mounting Screws
