Whirlpool AMD 383 Instruction for Use download pdf (Page 29)

The connection between an indoor unit and an

outdoor unit.

• Unscrew the flare nut for releasing pressure gas

in the indoor unit. If there is no high pressure gas

blowing out, it is the signal of a leaking indoor

unit.

• Fit the flare nut to the liquid pipe. Flare the pipes

and with flare tool.

• Tighten both flare nuts into gas pipe and liquid

pipe at the indoor unit with two holding spanners.

AIR PURGING

The purpose of air purging is to get rid of moisture and air in the system, otherwise moisture and air may

cause ineffectiveness of the compressor which directly affects the cooling capacity.

PURGING BY USING VACUUM

After tightening the flare nuts between the indoor and

the outdoor units.

• Remove a blank cap of a three-way valve by using a

torque wrench. Check if both high pressure and

low pressure valve are in closed condition.

• Remove the nut of the service port.

• Connect a gauge into the service port and vacuum

port and vacuum pump.

• Vacuum until the gauge indicates at 30 inches

mercury pressure.

• Remove gauge. Tighten up the nut of the service

port.

• Use a hexagonal wrench to open both high

pressure and low pressure valves to the end (counter clockwise).

• Tighten the blank cap of the three-way valve.

GAS LEAKING CHECK

• Check leakage by apply soapsuds to every

connection and inspect carefully. After checking,

wipe them off completely.

• Cover indoor unit joint with pipe insulation and 4

plastic bands to prevent condensation at joints.

Connecting wire

Liquid pipe

Diameter Drain Pipe ½

Piping tape

Gas tape

Point at 30 inches

mercury pressure

Open

Vacuum pump

OUTDOOR UNIT

Gauge

1 2 ... 24 25 26 27 28 29 30 31 32

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Whirlpool AMD 383 Instruction for Use Page 29

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