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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.
2.0~2.5 HP:
3.0~6.0 HP:
NOTE:
•
Position for the selected drain pipe is shown in figure 5.1 and the drain hole below is blocked with a
rubber plug.
Refrigerant Gas pipe
Refrigerant Liquid pipe
92
70
90
Refrigerant Gas Pipe
Refrigerant Liquid Pipe
92
70
90
Figure 5.1 Positions of the Pipe Connection
Capacity(HP)
Gas Pipe
2.0~3.0
Ø12.70(1/2)
4.0~6.0
Ø15.88(5/8)
Figure 5.2 Pipe Diameter
Drain Pipe Only with water pump
246
321
Drain Pipe
377
402
Drain Pipe Only with water pump
270
345
401
Drain Pipe
431
Unit: mm (in.)
Liquid Pipe
Ø6.35(1/4)
Ø9.53(3/8)
-10-
Unit : mm
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