Panasonic R410A Service Manual page 36

6. Charging Compressor Oil
Vacuum pump
(3) Charging compressor oil into outdoor unit
Connect the lower valve to the low-pressure sensor outlet (with Schrader-type, push-to-release valve) in the
outdoor unit to be oil-charged, and then connect the high-pressure sensor outlet (with push-to-release valve) to
1
the upper valve via the manifold gauge valves (at Hi-pressure gauge side). In addition, connect the gas line
service port (with push-to-release valve) to the DPR (Discharge Pressure Regulator). Carry out the connection
work quickly to avoid letting air enter.
2
CAUTION
Low-pressure outlet port
3
(For ø5/16" connector)
4
5
6
Manifold
gauge
Lo Hi
The hoses may be subject to internal pressure from the refrigerant inside the outdoor
unit. A Schrader-type, push-to-release valve is provided at each connection port.
Since the DPR valve opens at pressures of 362.6 psi and above, be sure to connect
the DPR to the gas line service port (low-pressure side).
Liquid tube service port
(For ø5/16" connector)
Gas tube service port
(For ø5/16" connector)
Open to run,
then close to stop
Upper side valve
Close to stop
Lower side valve
Fig. 2-10
Close to stop
Manifold
gauge
Lo Hi
Close to stop
Fig. 2-11
2 - 14
Mini VRF SYSTEM
Outdoor Unit Repair Procedures
Oil
DPR
Upper side
valve
Lower side
valve