Thermo King MD-MT - Receiver Tank Pressure Solenoid Valve (RTPS) Service; Purge Valve (PV) Service Procedures

Refrigeration Service Operations
124
Receiver Tank Pressure
Solenoid Valve (RTPS)
Removal
1. Pump down the low side and equalize the
pressure in the high side to slightly positive.
2. Remove the coil from the valve.
3. Unsolder the hot gas lines from the valve, and
remove the valve from the unit.
Installation
1. Clean the tubes for soldering.
2. Remove the coil from the valve, and place the
valve in position.
3. Solder the inlet and outlet connections. After
the valve cools, install the coil on the valve.
4. Pressurize the refrigeration system and test for
leaks.
5. If no leaks are found, evacuate the system.
6. Open the refrigeration valves and run the unit.
Check the refrigerant charge and the
compressor oil.
Purge Valve (PV)
NOTE: Valves that have nylon seats must be
disassembled before soldering.
Removal
1. Remove the refrigerant charge.
2. Remove the coil and disassemble the valve.
3. Unsolder the refrigeration lines from the
valve, and remove the valve from the unit.
Installation
1. Clean the tubes for soldering.
2. Remove the coil, disassemble the valve, and
place the valve in position.
3. Solder the inlet and outlet connections. After
the valve cools, assemble the valve and install
the coil.
4. Pressurize the refrigeration system and test for
leaks.
5. If no leaks are found, evacuate the system.
6. Recharge the unit with the proper refrigerant.
CAUTION: Use a heat sink or wrap the
valve with wet rags to prevent damage.
CAUTION: Use a heat sink or wrap the
valve with wet rags to prevent damage.
CAUTION: Use a heat sink or wrap the
valve with wet rags to prevent damage.
CAUTION: Use a heat sink or wrap the
valve with wet rags to prevent damage.