Photovoltaic Multi VRF
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4.3.4 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. (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.)
(4) Use sponge to wrap the un-insulated connection pipe and joint. Then tie the sponge
tightly with plastic tape.
(5) Connection pipe should be supported by a bearer rather than the unit.
(6) 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.
(7) 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.
4.3.5 Outdoor Pipe Connection
Twist the flared nut on the connection pipe of outdoor valves. Twisting method is the same
as for indoor pipe connection.
Below is the piping diagram of GMV-Y120WL/A-T, GMV-Y140WL/A-T, GMV-Y160WL/A-T,.
According to customer requirement or space limit, outlet pipe can be installed from the front,
right or rear side.
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