Piping Work And Refrigerant Charge; Max. Length Allowed; Oil Trap - Pioneer YH1824GHFD18R2 Technical & Service Manual

10.
PIPING WORK AND REFRIGERANT CHARGE

10. Piping work and refrigerant charge

10.1 MAX. length allowed

Height difference H
Model
48K/60K
Additional refrigerant charge
24K/36K: Additional refrigerant charge= (L-25) ft×0.38 oz/ft
48K/60K: Additional refrigerant charge= (L-25) ft×0.60 oz/ft

10.2 Oil trap

When the indoor unit is lower than outdoor unit and height difference is larger than 5m, set an oil
trap every 5m (height difference) on suction piping.
Slope: 1/200~1/250
NOTE:
1) To avoid storing too much oil in the oil trap, the oil trap should be as short as possible.
2) The horizontal piping should slope down along the refrigerant flow direction, to bring the oil
back to compressor, the slope is about 1/200 to1/250.
3) In order to ensure better cooling/heating performance, the refrigerant piping should be as short
and straight as possible.
Pipe length L
Indoor unit
Outdoor unit
Max. Height
Max. Pipe
length (L)
24K 164ft. (50m)
36K 246ft. (75m)
246ft. (75m)
Oil trap
Add.
Refrigerant
difference
[exceed 25ft
(H)
7.6m]
0.38(oz/ft)
98ft. (30m)
[35(g/m)]
0.38(oz/ft)
98ft. (30m)
[35(g/m)]
0.60(oz/ft)
98ft. (30m)
[56(g/m)]
Slope: 1/200~1/250
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