Carrier Cassette Sky 53QC 36 Installation Manual page 27

CONNECTING REFRIGERANT PIPING LINES (Cont.)
16.4 DIAMETERS OF REFRIGERANT PIPING LINES
System
Model
53QC36
53QC48
16.5 REFRIGERANT CHARGE
(1) The outdoor unit is factory supplied with refrigerant charge for use with refrigerant piping lines
of length 4 meters and with added 50 grams for air and moisture purge from the system.
(2) For refrigerant piping lines of length more than 5 meters, add in the field 25 grams of refrigerant
per extra meter more than 4 meters :
Example 1 = For 8 meter lines, refrigerant added = (8-4) x 25 = 100 grams.
Example 2 = For 12 meter lines, refrigerant added = (12-4) x 25 = 200 grams.
(3) NOTES
• Refrigerant overcharge may cause a serious trouble of compressor.
• Refrigerant undercharge may cause reduction of system performance.
Gas line Liquid line
diameter diameter
3/4" 3/8"
3/4" 3/8"
25
Max.
Length
Meter
25
30