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5. Refrigerant Piping Work
5. Refrigerant Piping Work
DANGER
!
Use only R32 refrigerant. During leakage and air tight test, no oxygen, acetylene, flammable or
•
poisonous gases must be charged, as these gases may cause explosion. It is recommended to use dry
nitrogen for test.
5.1 Piping Materials
1. Prepare copper pipes suitable for use with R32 refrigerant and comply with local regulations on
installation site.
2. Choose clean copper pipe with no dust and moisture within. Before installation, remove any dust and
impurities with nitrogen gas or dry air.
3. Select the copper pipes as per figure 5.2.
5.2 Piping Connection
1. See positions of the pipe connection in figure 5.1.
9000~12000Btu/h :
18000~48000Btu/h :
NOTE:
Position for the selected condensate pipe is shown in figure 5.1 and the drain hole below is blocked
•
with a rubber plug.
Refrigerant Liquid pipe
3-5/8(92)
3-1/32(77)
3-35/64(90)
3-5/8(92)
2-3/4(70)
3-35/64(90)
Figure 5.1 Positions of the Pipe Connection
Capacity(Btu/h)
Gas Pipe
9000~24000
1/2 (12.70)
30000~48000
5/8 (15.88)
Figure 5.2 Pipe Diameter
Refrigerant Gas pipe
9-11/16(246)
12-41/64(321)
14-27/32(377)
15-53/64(402)
Refrigerant Gas Pipe
Refrigerant Liquid Pipe
10-5/8(270)
13-37/64(345)
15-25/32(401)
16-31/32(431)
[Unit: in. (mm)]
Liquid Pipe
1/4 (6.35)
3/8 (9.53)
-10-
[Unit: in. (mm)]
Condensate pipe
Condensate pipe
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