I Pump Down - Sanyo SAP-CMRV3656EH Technical & Service Manual

I
Pump Down
In order to protect the earth's environment, be sure to perform pump-down to recover refrigerant
G
When relocating or disposing of the air conditioner,
request this service from the dealer where the unit was
purchased, or from an appropriate agent. Perform pump-
down as described below.
What is pump-down?
G
Pump-down refers to recovering the refrigerant gas from
the refrigerant cycle at the outdoor unit. This work must be
performed during cooling operation. The refrigerant gas
cannot be recovered during heating operation.
G During winter, or if the temperature sensor prevents cooling
operation, perform "forced cooling operation."
Pump-down procedure
(1) Fully close the spindles at the valves on the narrow tube
side of tubes A, B, C, D and E. (Refer to Fig. 22.)
(2) Connect the manifold gauge to the charging port at the
valve on the wide tube side of tube E. Purge the air from
the charging hose. (Refer to Fig. 23.)
(3) Perform cooling operation or forced cooling operation.
When the pressure at the low-pressure side is 0.05 – 0.1
MPaG (0.5 – 1 kg/cm
valves on the wide tube side of tubes A, B, C, D and E,
and immediately stop operation. (Refer to Fig. 23.)
In the winter, the outdoor unit may stop after 5 – 10 min-
utes of operation. This is in order to protect the indoor
unit heat exchanger from freezing and does not indicate
a problem.
(4) Disconnect the manifold gauge and the inter-unit
tubes, and attach the caps and flare nuts. At this point,
pump-down is completed. (If the caps and flare nuts
are not reattached, there is the danger of gas leak-
age.) (Refer to Fig. 24.)
If pump-down is not possible
If the air conditioner cannot be operated because of a
malfunction or other cause, use a refrigerant recovery
device to recover the refrigerant.
gas without releasing it into the atmosphere.
2
G), fully close the spindles at the
Narrow tube side
Charging port
Wide tube side
Charging hose
Cap
Cap
Cap
Cap
Cap
14
Close
E
Close
D
Close
C
Close
B
Close
A
Fig. 22
E
D
C
B
A
Manifold gauge
Fig. 23
After disconnecting
the inter-unit tubes,
attach the flare nuts
with flare bonnets.
Fig. 24