Trane R Series, Installation Operation & Maintenance

Page: 145 / 188

RLC-SVX07A-EN 145
Refrigerant Charging
2. Close the discharge service valve.
3. Before closing the liquid line service valve, attach a manifold gauge set to
the liquid line valve backseat port.
4. Close the liquid line service valve.
5. Attach the inlet of a liquid transfer pump to the manifold gauge set and
the outlet to the 1/4” angle valve, located between the EXV and the evap-
orator. This will transfer the liquid refrigerant.
6. Remove the liquid transfer pump. Attach the inlet of a recovery system to
the manifold gauge set and the outlet to the 1/4” angle valve, located
between the EXV and the evaporator. Remove all of the vapor from the
high side of the system.
7. Complete all necessary repairs.
8. Evacuate the high side through the access port on the liquid line service
valve that has the manifold gauge set attached to it.
9. Open all of the valves and run the unit. Verify the refrigerant charge by
measuring the subcooling and monitor the sightglass.