Connecting a refrigerant pipe
The indoor unit is connected to a liquid pipe, gas pipe and drain pipe. The inside of the refrigerant pipe should be cleaned.
1. Purging the pipe
f
The indoor unit is packed with nitrogen gas to protect the product in delivery. Remove the stopper of the pipe and purge
the pipes.
t
Do not remove the stopper until you are ready to work on the pipe connection to prevent foreign substance
from entering the pipe.
CAUTION
High pressure
pipe
Low pressure
pipe
2. Connecting the pipe
f
Place the pipes to each liquid and gas pipe of the indoor unit and turn the nuts of flaring part by hand, then tighten the
nuts by using a torque wrench. When tightening the nuts, correct torque should be applied depending on the pipe size.
f
When cutting the pipes, refer to the 'Cutting or flaring a pipe' section.
f
For wall mounted type, the pipe can be installed on left, right, bottom and rear side of the indoor unit.
❋
Correct tightening torque should be applied depending on the diameter of the pipe. Tighten the nuts firmly to prevent
any refrigerant leak.
Outer diameter
(D, mm)
5PSRVF /tN
Flaring (L, mm)
Flaring shape
6.35
14~18
8.6~9.0
90°±2°
45°±2°
R 0.4~0.8
D
L
9.52
34~42
12.6~13.0
12.70
49~61
15.8~16.2
15.88
68~82
19.0~19.4
❋
/tNLHGtDN
t
When brazing work is required for the pipe, nitrogen blowing work should be carried out.
t
Apply the refrigerating oil on the surface of the flaring part to prevent refrigerant gas leak.
t
When bending the connection pipe, make sure that the pipe does not have any cracks or twists.
t
When the refrigerant pipe is not correctly connected and the compressor is operating with the service valve
opened, the refrigerant pipe intakes air and creates high pressure inside the refrigerant cycle, which causes
explosion or injury.
CAUTION
ENGLISH-9
02
INST
ALLA
TION
Summary of Contents for AM140RNPDKH Series
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