Vacuuming And Charging; Charge Operation - Daikin FTD20JEV1K Installation Manual

R22 split series

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Table Of Contents

Table of Contents

Vacuuming is necessary to eliminate all moisture and air from the system.

Vacuuming 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 malfunction

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 changing 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.

Charge Operation

This operation must be done by using a gas cylinder and a

precise weighing 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.