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CONNECTING REFRIGERANT PIPING LINES (Cont.)
16.4 DIAMETERS OF REFRIGERANT PIPING LINES UP TO 20 METER LENGTH
System
Model
Gas line
diameter
Liquid line
diameter
53QPCT18 1/2” 1/4”
53QPCT24 5/8” 1/4”
16.5 REFRIGERANT CHARGE
(1) The outdoor unit is factory supplied with refrigerant charge for use with refrigerant piping lines
of length 3 meters and with added 50 grams for air and moisture purge from the system.
(2) For refrigerant piping lines of length more than 3 meters, add in the field 25 grams of refrigerant
per extra meter more than 3 meters :
Example 1 = For 8 meter lines, refrigerant added = (8-3) x 25 = 125 grams.
Example 2 = For 12 meter lines, refrigerant added = (12-3) x 25 = 225 grams.
(3) NOTES
• Refrigerant overcharge may cause a serious trouble of compressor.
• Refrigerant undercharge may cause reduction of system performance.
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