Johnson Controls YVAHP0721CW Series, Service Manual

Page: 311 / 416

SM-16007
4-27
MAINTENANCE
TURN OFF all power source switches.
Tool Adjustable Wrench
(8) Cover the hole of (L) brazing for return oil circuit using tape.
Connect a charging hose to (M) brazing for oil separator outlet. Then, charge nitrogen (22 psi (0.15
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separator, applying pressure.
NOTE:
In an instance where the unit has two return oil circuits and two oil separators, collect the refrigerant oil
from one oil separator and then from the other.
(9) Stop charging nitrogen after the refrigerant oil has completely been collected and connect the return oil
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collected from (C) access port for recovering refrigerant oil.
NOTE:
If replacing the return oil circuit only, procedures (8) and (9) are not required.
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port and recharge the refrigerant. After recharging, open the stop valves.
NOTES:
1. Use a clean charging hose.
2. Charge the refrigerant oil in a short amount of time (within approximately 20 minutes).
Use a container with a small opening so that the refrigerant oil will not absorb moisture from the
atmosphere.
(K) Oil Separator
(M) Brazing for
Oil Separator Outlet
(I) Return Oil Circuit
(For Inverter Compressor)
(I) Return Oil Circuit
(Remove after cutting.)
Details of Cutting Position
(I) Return Oil Circuit
(For Constant Speed Compressor)
(L) Brazing for Return Oil Circuit
(G) Solenoid Valve Coil
(J) Accumulator Pipe
(H) Solenoid Valve Body
Cut
(I) Return Oil Circuit
Details of Cutting Position
Cut
(J) Accumulator Pipe