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Refrigerant and Drainage Piping
Refrigerant and Drainage Piping
3. Refrigerant and Drainage Piping
Tools and Instruments
One set of piping tools ((+) (-) screw drivers, Tape measure, Knife, Hacksaw, Hexagon spanner, Spanner
(14,17,19,22,24 & 30mm opening), Hose cutter, Flared tube expander), Gas Leak Detector, R32 Refrigerant.
Piping Material
(1) The used copper tubes of refrigerant (R32) unit must be updated, washing, and using repeatedly is extremely
prohibited.
(2) The pipe end flare mouth of flare nut connection, please refer to refrigerant (R32) piping require size to process as
below.
(3) The unit uses environmentally refrigerant (R32), when it is in the construction, please make sure the cycle system
to keep dry, clean, and airtight. Before piping connections, please use nitrogen or dry air clear the dust or
impurities within the pipe.
3.1 Preparations
(1) Confirm that the piping are de-oxidized seamless copper tubes, and that they are free from dirt and moisture.
(2) Piping connections to the outdoor unit can be performed at the stop valves for liquid outlet and gas inlet in the
machine compartment. Flare nuts are attached at liquid and gas connections of the indoor and the outdoor unit.
(3) All refrigerant and drainage piping shall be duly insulated to keep off frost.
Specification of refrigerant and drainage piping
Model
Indoor Unit Outdoor Unit
RPS-90AN
RAC-90JP
(4) Confirm that the indoor unit piping direction and accessories is suitable.
◆
Indoor unit piping direction
NOTE:
For unit operational durability, it is recommended to use a field-supplied filter dryer in the refrigeration cycle.
Piping Diameter (ØD)
Ø6.35 (1/4")
Ø9.53 (3/8")
Ø12.7 (1/2")
Ø15.88 (5/8")
Refrigerant Piping Length (1-30m)
Liquid Line
Size : Ø 6.35mm
Size :
Type : 1/4 Flare Nut Type : 5/8 Flare Nut
Quantity :
1
Quantity :
Size of (ØA)
Ø10.0
Ø13.2
Ø16.6
Ø19.7
Drainage Piping Additional Refrigerant (30g)
Gas Line
Outer Diameter
Ø 15.88mm
Ø 20mm
1
- 11 -
Thickness (t)
0.8
0.8
0.8
1.0
of each increasing 1m
From (11~30m)
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