Liquid Line Solenoid Valve Replacement (R-134a System Only)

Parent topic: Refrigeration Maintenance

Removal

  1. Close the liquid line service valve and pump down the low side to -35 kPa, -0.35 bar, 10 in. vacuum. Break the vacuum with nitrogen between 10 and 20 kPa, 0.10 and 0.20 bar, 1 and 3 psig.

  2. Turn the unit On-Off switch OFF. Disconnect electrical connections to liquid line solenoid.

    Note In most cases, only the coil requires replacement. No other repair is possible on the liquid line solenoid.

  3. Unsolder the liquid line connections from the valve.

  4. Remove the valve from the unit.

Installation

  1. Clean the tubes for soldering.

  2. Place the new valve in position and solder the connections.

      Notice
    • Equipment Damage
    • Use a heat sink, P/N 204-584, or wrap the vibrasorber with wet rags to prevent damaging the vibrasorber.

  3. Release a small amount of refrigerant from the receiver tank to pressurize the liquid line. Check for leaks (see “Refrigerant Leak Test Procedure” in the Refrigeration Maintenance chapter of this manual).

  4. If no leaks are found, recover the leak test gas (see “Refrigerant Recovery” in the Refrigeration Maintenance chapter of this manual).

  5. Evacuate the low side (see “Evacuation and Cleanup of the Refrigeration System” in the Refrigeration Maintenance chapter of this manual).

  6. Reconnect the electrical wires to the valve.

  7. Open the liquid line service valve and place the unit in operation. Check the refrigerant charge and add refrigerant as required.