26
Rated capacity of indoor unit
C
-
kW
(Btu/h)
Pipe between indoor branch and IDU
Gas Pipe mm(in.)
Liquid Pipe mm(in.)
C
≤
2.8
(9000)
Φ9.52(3/8)
Φ6.35(1/4)
2.8
(9000)
＜
C
≤
5.0
(17000)
Φ12.7(1/2)
Φ6.35(1/4)
5.0
(17000)
＜
C
≤
14.2
(48000)
Φ15.9(5/8)
Φ9.52(3/8)
14.2
(48000)
＜
C
≤
22.4
(76000)
Φ19.05(3/4)
Φ9.52(3/8)
22.4
(76000)
＜
C
≤
28.0
(96000)
Φ22.2(7/8)
Φ9.52(3/8)
4.3 Installation of the Connection Pipe
4.3.1 Precautions when installing the connection pipe
NOTICE!
Before welding the pipeline sealing cap, please make sure there’s no refrigerant in pipeline.
If welding it directly, it may cause unnecessary property damage or personal injury.
(1) Conform to the following principles during piping connection: Connection pipeline
should be as short as possible.The height difference between indoor and outdoor units
should be as short as possible.Keep number of bends as little as possible. The radius
of curvature should be as large as possible.
(2) Weld the connection pipes between indoor and outdoor unit. Please strictly conform to
the requirements for welding process. Rosin joints and pin holes are not allowable.
(3) When laying the pipes, be careful not to deform them. The radius of bending parts
should be more than 200mm. The pipes can not be repeatedly bent or stretched,
otherwise the material will get harden. Do not bend or stretch the pipe over three times
at the same position.
(4) Please use a torque wrench to connect union nut on the indoor unit..See Fig.33.
Fig.33
1) Align the expansion end of copper pipe with the center of threaded joint. Tighten the
flare nuts with your hands.
2) Tighten the flare nuts with torque wrench until you hear "click" sound.
3) Use sponge to wrap the connecting pipe and joints without thermal insulation and tie
it up with plastic tape.
4) A mounting support for the connection pipe is required.
5) The curvature degree of connection pipe should not be small, otherwise the pipe
might crack. Installation personnel should use tube bender when bending the pipe.
6) Don't forbibly stretch the pipe joint, otherwise indoor capillary or other pipes might be
damaged and lead to refrigerant leakage.
Lennox
VRF Unit
Содержание VEP Series
Страница 42: ...39 Fig 47 Fig 48 Fig 49 Lennox VRF Unit...
