The pipe sizes/refrigerant charges quoted are for guidance only. It is the responsibility of the
installing contractor/site engineer to check the pipe sizes/refrigerant charges are correct for each
system installation and application.
Split systems may require additional oil which should be added to the low side of each
compressor.
Design should be in accordance with accepted refrigeration practice to ensure good oil return to
the compressor(s) under all normal operating conditions.
Liquid Line (m)
kg/m
3/8”
0.05
1/2”
0.09
5/8”
0.15
3/4”
0.21
7/8”
0.30
1 1/8”
0.53
Liquid Line Refrigerant Charge (kg/m)
The following table shows the refrigerant charge / metre for the liquid line, using R410A and assuming a liquid line
temperature of 40°C.
IMPORTANT
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