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 compressed air, the nitrogen or the refrigerant
be used to perform these experiments.
4.1 The 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 tube dust and impurity.
(3)Choose the copper pipe according to Fig. 4.2.
4.2 The Connection of the Pipe
(1) The connection positions of the pipe are shown in
Fig. 4.1 and Fig. 4.2.
9
Fig. 4.1 The connection positions of the tube
Fig. 4.2 The pipe diameter
The refrigerant gas pipe
The refrigerant liquid pipe
(2) As shown in Fig. 4.3, screw up the nuts with 2 spanners.
Fig. 4.3 Screw up the nut torque
(3) After finishing connecting the refrigerant pipes, keep
it warm with the insulation material.
φ6.35mm
φ9.52mm
φ12.7mm
φ15.88mm
φ19.05mm
Tube size
20
40
60
80
100
Torque（N.m）
Fig. 4.4 Piping insulation procedure
Clamp(attached)
Insulation (attached)
Refrigerant pipe
(field supplied)
Side of the
indoor unit
Insulation
( )field supplied
Installation and Maintenance
DANGER
Drain pipe connection hole
·The pipe go through the hole with the seal.
Protected with the tape or plug.
Do not put the pipes on the
floor directly.
CAUTION
·Do not put the pipes on the floor directly.
unit:mm
Fig. 4.2 The pipe diameter
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