CONNECTING REFRIGERANT PIPING LINES
17.4 REFRIGERANT CHARGE
(1) The outdoor unit is factory supplied with refrigerant charge for use with refrigerant piping lines
of length 5 meters.
(2) For refrigerant piping lines of length more than 5 meters, add in the field extra amount of
refrigerant charge as per below table :
Extra Amount of Refrigerant / Meter
Examples :
For system Model 53KDHT60N-518
For 10 meter lines, refrigerant added = ( 10 – 5 ) x 15 = 75 grams.
For 20 meter lines, refrigerant added = ( 20 – 5 ) x 15 = 225 grams.
17.4.1 NOTES
Refrigerant overcharge may cause a serious trouble of compressor.
Refrigerant undercharge may cause reduction of system performance.
Refrigerant cannot be charged until all field electrical wiring has been completed.
Refrigerant may only be charged after performing leak testing and air purging using
vacuum pump.
When charging the system, care shall be taken that the maximum permissible refrigerant
charge is never exceeded to protect the compressor against liquid hammer.
Charging with an unsuitable refrigerant may cause explosions and accidents, so always
ensure that R410A refrigerant is charged.
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