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F. Removal and Replacement of Hot Gas Valve
CAUTION
Always use a copper tube of the same diameter and length when replacing the
hot gas lines; otherwise performance may be reduced.
IMPORTANT
Always install a new drier every time the sealed refrigeration system is opened.
Do not replace the drier until after all other repair or replacement has been
made.
1) Turn off the power supply.
2) Remove the panels.
3) Recover the refrigerant and store it in an approved container.
4) Remove the screw and the solenoid.
5) Disconnect the hot gas valve or line valve using brazing equipment.
6) Install the new valve, with nitrogen gas flowing at a pressure of 3 to 4 psig (.21 to .28 bar).
WARNING
Always protect the valve body by using a damp cloth to prevent the valve from
overheating. Do not braze with the valve body exceeding 121°C.
7) Install the new drier.
8) Check for leaks using nitrogen gas at 140 psig (9.65 bar) and soap bubbles.
9) Evacuate the system and charge it with refrigerant. See the nameplate for the required
refrigerant charge.
10) Cut the leads of the solenoid allowing enough lead length to reconnect using closed
end connectors.
11) Connect the new solenoid leads.
12) Attach the solenoid to the valve body, and secure it with a screw.
