4. Refrigerant Pipe
Use the refrigerant according to outdoor nameplate.
When carrying on the leakage check and test, do not
mix in the oxygen, the acetylene and flammable and
the virulent gas, for these gases are quite dangerous,
and may possibly cause explosion. It is suggested
that the nitrogen be used to perform these experiments.
4.1 Pipe Material
(1) Prepare the copper pipe on the spot.
(2) Choose dustless, non-humid, clean copper pipe.
Before installing the pipe, use nitrogen or dry air to
blow away the
e dust and impurity.
pip
(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 and Fig. 4.2.
10
(2) As shown in Fig. 4.3, screw up the nuts with 2
spanners.
(3) After finishing connecting the refrigerant pipes,
keep it warm with the insulation material.
Fig. 4.4 Piping insulation procedure
Installation and Maintenance
DANGER
·
The pipe goes through the hole with the seal.
CAUTION
·
Do not place the pipes on the floor directly.
Fig. 4.3
Tightening torque for the nut
Clamp*
Insulation*
Refrigerant pipe
(field supplied)
Side of the
indoor unit
Insulation
(field supplied)
Fig. 4.2 The pipe diameter
1.0HP(9K)/1.5HP(12K)/2.0HP(18K)
Ref. gas pipe
Ref. liquid pipe
Drain pipe (for drain pump)
Drain pipe
6-9/16 (166)
5 (129)
8-5/8 (220)
3-7/8 (97)
3-3/8 (86)
1-3/8 (35)
Unit: in. (mm)
Fig. 4.1 The connection positions of the pipe
Model
Gas Pipe
[in. (mm)]
Liquid Pipe
[in. (mm)]
1.0HP(9K)/1.5HP(12K)
ø
3/8 (9.52)
ø
1/4 (6.35)
2.0HP(18K)
ø
1/2 (12.7)
ø
1/4 (6.35)
3.0HP(24K)
ø
5/8 (15.88)
ø
3/8 (9.52)
4.0HP(36K)
ø
3/4 (19.05)
ø
3/8 (9.52)
Pipe size [in. (mm)]
Torque
[
lbf ft
.
(N m
)]
ø
1/4 (6.35)
ø
3/4 (19.05)
ø
5/8 (15.88)
ø
1/2 (12.7)
ø
3/8 (9.52)
.
.
14.8 (20)
73.8 (100)
59.0 (80)
44.3 (60)
29.5 (40)
3.0HP(24K)/4.0HP(36K)
Ref. gas pipe Ref. liquid pipe
Drain pipe (for drain pump)
Drain pipe
9-5/16 (237)
12-5/16 (312)
14-3/4 (375)
15-3/4 (400)
1(25)
7-5/16 (186)
9-1/2 (242)
Protected with the tape or plug.
Correct Incorrect
*:
For some models, these parts require site preparation.
