Refrigerant piping
1
Piping requirement
Model
Outer diameter of pipe (mm)
Gas
Liquid
3.0/3.5HP
15.88
9.52
4.0/5.0/6.0/6.5HP
19.05
9.52
The shorter the refrigerant piping is, the better the performance will be. So the connecting pipe should be as short as possible.
Indoor unit
Outdoor unit
Pipe length L
Height difference H
(Unit: mm)
Model
Max. pipe length
(L)
Max. height
difference (H)
Add. refrigerant
(exceed 5m)
3.0HP
30 (m)
15 (m)
28 (g/m)
3.5/4.0/5.0/
6.0/6.5HP
50 (m)
30 (m)
28 (g/m)
Refrigerant piping between indoor unit and outdoor unit
Oil trap
Slope: 1/200~1/250
Slope: 1/200~1/250
Oil trap
Refrigerant additional charge
The unit has been filled with refrigerant, but if exceeds 5m, additional refrigerant (R32) charge is required.
Additional refrigerant charge =(L-5)×28g/m
Oil trap
When the indoor unit is lower than outdoor unit and height is larger than 5m, set an oil trap every 5m (height difference) on suction
piping.
NOTE:
• To avoid storing too much oil in the oil trap, the oil trap should be as short as possible.
• The horizontal piping should be slope down along the refrigerant flow direction, to bring the oil back to compressor, the slope is
about 1/200 to1/250.
• In order to ensure a better cooling/heating performance, the refrigerant piping should be as short and straight as possible.
2
Piping material
1.
Prepare locally-supplied copper pipes.
2.
Select clean copper pipes. Make sure that there is no dust and moisture inside of the pipes. Blow the inside of the pipes with
nitrogen or dry air to remove any dust or foreign materials before connecting pipes.
3. Piping thickness and material of the pipe are shown below.
Unit: mm
Diameter
Thickness
∅
6.35
0.8
∅
9.52
0.8
∅
12.7
0.8
∅
15.88
1.0
∅
19.05
1.0
INSTALLATION INSTRUCTIONS
HO2019292HA
12