4 Refrigerant Pipe
!
DANGER
Use the refrigerant according to outdoor nameplate. When carrying
out the leakage check and test, do not mix in the oxygen, the
acetylene and the flammable and the reactive gas, because these
gases may result in explosion. It is suggested to use compressed
air, nitrogen or refrigerant to perform these experiments.
4.1
Pipe Material
1
Prepare the copper pipe on site.
2
Choose dustless, non-humid, clean copper pipe. Before
installing the pipe, use nitrogen or dry air to blow away the
dust and impurities on the pipe.
3
Choose the copper pipe according to Fig. 4.2.
4.2 Piping Connection
1
The connection positions of the pipe are shown in Fig. 4.1.
166
129
220
97 86
35
Refrigerant
liquid pipe
Refrigerant
gas pipe
Drain pipe (for drain pump)
Drain pipe
(Unit: mm)
3.0HP
26
8
24
2
16
7
11
3
89
410
207
129
375
Drain pipe (for drain pump)
Refrigerant
gas pipe
Refrigerant
liquid pipe
Drain pipe
3.5HP~4.0HP
237
312
375
400
25
18
6
24
2
Refrigerant
gas pipe
Refrigerant
liquid pipe
Drain pipe (for drain pump)
Drain pipe
5.0HP~6.5HP
Fig. 4.1 Connection positions of the pipe
Model
Gas Pipe (mm)
Liquid Pipe (mm)
3.0/3.5HP
∅
15.88
∅
9.52
4.0/5.0/6.0/6.5HP
∅
19.05
∅
9.52
Fig. 4.2 Pipe diameter
2
As shown in Fig. 4.3, tighten the nuts with 2 spanners.
Pipe size
Torque (Nm)
∅
6.35mm
20
∅
9.52mm
40
∅
12.7mm
60
∅
15.88mm
80
∅
19.05mm
100
Fig. 4.3 Tightening torque for the nut
3
After finishing connecting the refrigerant pipes,
keep it warm
with insulation material.
Insulation
(field supplied)
Insulation (attached)
Refrigerant pipe
(field supplied)
Clamp (attached)
Side of the
indoor unit
Fig. 4.4 Piping insulation procedure
!
CAUTION
•
The pipe goes through the hole with the sealing material.
• Do not place the pipes directly on the floor.
Correct
Incorrect
Protected with the
tape or plug.
INSTALLATION AND MAINTENANCE
HO2019290HA
14