Refrigerant Piping - Westinghouse 9K/12K Use And Installation Instructions

Installation instructions

Refrigerant piping

1. Piping requirement
Model
9K/12K
18K
24K
36K
The shorter piping length is, the better the performance will be. So the connecting pipe should be as short as
possible.
Height difference H
Model
9K/12K
18K
24K/36K 164 ft. (50m)
Refrigerant additional charge
The unit has been filled with refrigerant, but if exceeds 25 ft. (7.6m), additional refrigerant (R410A) charge is
required.
For 9K~18K: Additional refrigerant charge =(L-25)×0.161 oz/ft
For 24K~36K: Additional refrigerant charge =(L-25)×0.376 oz/ft
2. Piping material
(1) Prepare locally-supplied copper pipes.
(2) Select clean copper pipes. Make sure 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 as below.
Thickness
Diameter
[in. (mm)] [in. (mm)]
ø
1/4 (6.35) 1/32 (0.8)
ø
3/8 (9.52) 1/32 (0.8)
ø
1/32 (0.8)
1/2 (12.70)
ø
5/8 (15.88) 1/32 (1.0)
ø
3/4 (19.05) 1/32 (1.0)
Outer Diameter of Pipe
in. (mm)
Gas
ø3/8(ø9.52)
ø1/2(ø12.7)
ø 5/8 (ø15.88)
ø 3/4 (ø19.05)
Pipe length L
Indoor unit
Outdoor unit
Max. Pipe Max. Height
length (L) difference (H)
82 ft. (25m) 33 ft. (10m)
98 ft. (30m) 49 ft. (15m)
98 ft. (30m)
Liquid
ø1/4(ø6.35)
ø1/4(ø6.35)
ø 3/8 (ø9.52)
ø 3/8 (ø9.52)
Add. Refrigerant
[exceed 24.6 ft. (7.6m)]
0.161 oz/ft (15g/m)
0.161 oz/ft (15g/m)
0.376 oz/ft (35g/m)
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