Vacuuming And Charging - Daikin FT20FV1M Installation Manual

Wall mounted split type air conditioner

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Table Of Contents

Table of Contents

Purging The Piping And The Indoor Unit

Except for the outdoor unit which is pre-charged with refrigerant, the indoor

unit and the refrigerant connection pipes must be air-purged because the air

containing moisture that remains in the refrigerant cycle may cause malfunc-

tion of the compressor.

• Remove the caps from the valve and the service port.

• Connect the center of the charging gauge to the vacuum pump.

• Connect the charging gauge to the service port of the 3-way valve.

• Start the vacuum pump. Evacuate for approximately 30 minutes. The

evacuation time varies with different vacuum pump capacity. Confirm that

the charging gauge needle has moved towards -760mmHg.

Caution:

• If the gauge needle does not move to -760mmHg, be sure to check for gas

leaks (using the refrigerant detector) at flare type connection of the indoor

and outdoor unit and repair the leak before proceeding to the next step.

• Close the valve of the charging gauge and stop the vacuum pump.

• On the outdoor unit, open the suction valve (3 way) and liquid valve (2 way)

(in anti- clockwise direction) with 4mm key for hexagon sacked screw.

Additional Charge

The refrigerant is pre-charged in the outdoor unit. If the piping length is less than 7.62m (25ft), then additional charge after vacuuming is

not necessary. If the piping length is more than 7.62m (25ft), then use the additional charge valve as indicated in the table.

Additional charge in gram (For R22 models)

Model

FT20FV1M / FT25FV1M

FT28FV1M/FT35FV1M

FT50FV1M

FT60FV1M9

Charge Operation

This operation must be done by using a gas cylinder and a precise weigh-

ing machine. The additional charge is topped-up into the outdoor unit

using the suction valve via the service port.

• Remove the service port cap.

• Connect the low pressure side of the charging gauge to the suction

service port center of the cylinder tank and close the high pressure

side of the gauge. Purge the air from the service hose.

• Start the air conditioner unit.

• Open the gas cylinder and low pressure charging valve.

• When the required refrigerant quantity is pumped into the unit, close

the low pressure side and the gas cylinder valve.

• Disconnect the service hose from service port. Put back the service

port cap.