Sanyo CH0951 Manual Do Utilizador

■

Pump down means collecting all refrigerant gas in the

system back into the outdoor unit without losing any of

the gas. Pump down is used when the unit is to be

moved or before servicing the refrigerant circuit.

(1) Connect the Lo side charging hose of the manifold

valve to the service port on the wide tube service

valve.

(2) Using a hex wrench, turn the narrow tube service

CLOSED

Fully OPEN

Fully OPEN

Shipping

Operating and 

test running 

the air conditioner

Measuring pressure

and gas charging

Air purging with

a vacuum pump

CLOSED

Valve cap

Stem

O-ring

*

*

*

The service port on the wide tube service
valve uses a Schrader core valve to access
the refrigerant system. Therefore, be sure to
use a hose connector which has a push-pin
inside. (Fig. 55)

PUSH

Hose with push-pin

Service valve

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The basic function of the service valves are given in Table 7 below.

valve clockwise all the way to close the service

valve. (Be sure to confirm that the wide tube ser-

vice valve is fully open.)

(3) Press the operation button and start cooling opera-

tion.

(4) When the low pressure gauge reading falls to 1 to

0.5 kg/cm

2 

(14.2 to 7.1 PSI), fully close the wide

tube valve stem with a standard screwdriver. Then

quickly stop the unit.

(5) Disconnect all gauges and hoses, and replace the

bonnets and the valve caps as they were before.

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