Panasonic U-10MF1E8, Руководство по обслуживанию

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3-WAY SYSTEM
Outdoor Unit Repair Procedures
2
8. Charging Compressor Oil
(2) Charging compressor oil into oil-charging tank
Connect a piece of pipe to the lower valve and then insert the other end deeply into the bottom of the oil
container. Make sure you avoid letting any air be sucked into the tube. Next, run the vacuum pump and open the
manifold gauge valves, then open the upper and lower valves to begin charging oil into the charging tank.
Fig. 14
When the predetermined amount of oil has been charged into the oil-charging tank, immediately close the lower
valve and start the vacuum pump to reduce the pressure below -101 kPa (-755 mmHg, 5 Torr). Then close the
upper valve and stop the vacuum pump.
Do this operation quickly because compressor oil easily absorbs moisture
from the air.
(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
the upper valve via the manifold gauge valves (at Hi-pressure gauge side). In addition, connect the suction 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.
• 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 2.5 MPa and above, be sure to
connect the DPR to the suction line service port (low-pressure side).
Fig. 15
CAUTION
CAUTION
Manifold gauge
Lo Hi
Vacuum pump
First close the lower and then,
this one before stopping.
Upper valve
Lower valve
Close this valve before stopping.
Oil
Manifold gauge
Lo Hi
High-pressure outlet port
(For 7.94mm-dia. connector)
Low-pressure
outlet port
(For 7.94mm-
dia. connector)
Suction tube service port
(For 7.94mm-dia. connector)
DPR
Upper valve
Lower valve
Close to stop
Close to stop
SM830188-00̲3WAY.indb 17 SM830188-00̲3WAY.indb 17 2011/03/01 11:55:55 2011/03/01 11:55:55