DC Inverter Multi VRF System
11
(4) In case that direct bending will open cracks to the pipe, first use sharp cutter to cut the
insulating layer, as shown in Fig.4.10. Do not bend the pipe until it is exposed. When
bending is done, wrap the pipe with insulating layer and then secure it with adhesive tape.
Fig.4.9 Fig.4.10
4.3.3 Indoor Pipe Connection
(1) Remove pipe cover and pipe plug.
(2) Direct the flared part of copper pipe to the center of screwed joint. Twist on the flared nut
tightly by hand, as in Fig.4.11 (Make sure indoor pipe is correctly connected. Improper
location of the center will prevent flared nut from being securely twisted. Thread of nut will
get damaged if the flared nut is twisted forcibly).
(3) Use torque wrench to twist on the flared nut tightly until the wrench gives out a click sound
(Hold the handle of wrench and make it at right angle to the pipe. as in Fig.4.12).
(1) Use sponge to wrap the un-insulated connection pipe and joint. Then tie the sponge tightly with plastic tape.
(2) Connection pipe should be supported by a bearer rather than the unit.
(3) The bending angle of piping should not be too small; otherwise the piping might have cracks. Please use a pipe
bender to bend the pipe.
(4) When connecting IDU with connection pipe, do not pull the big and small joints of IDU with force in case the
capillary tube or other tubes have cracks and cause leakage.
Fig.4.11 Fig.4.12
Pipe diameter
Tightening torque
Φ
6.35mm
15~30(N·m)
Φ
9.52mm
35~40(N·m)
Φ
12.7mm
45~50(N·m)
Φ
15.9mm
60~65(N·m)
Summary of Contents for GMV-36WL/C-T
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