Instruction of the GMV D.C. Inverter
10
4.4.3 Connection of Outlet Pipe for Indoor & Outdoor Unit
See below for the torque required to tighten the nuts.
Align the expansion end of copper pipe with the center
of threaded joint. Tighten the aring nuts with your hands.
Tighten the aring nuts with torque wrench until you
hear a “click”.
Bend of tting pipe shall not be too low; otherwise the
tting pipe might crack. Please use pipe bender when
bending the tting pipe.
Use sponge to wrap the connecting pipe and joints without heat preservation. Tie with plastic tapes.
Torque Sheet for Tightening Nuts
Pipe Diameter (mm) Wall Thickness (mm) Tightening Torque (N·m)
φ6.35 0.5 15-30
φ9.52 0.7 30-40
φ12.7 1 45-50
φ15.9 1 60-65
φ19.05 1 70-75
Caution:
1) When connecting indoor unit and pipe, never pull the big and small joint of indoor unit with force, so
as to prevent the capillary tube or other tubes of indoor unit from cracking and causing leakage.
2) Connecting pipe shall be supported by a rack without transmitting its weight to other units.
4.4.5 Connection of Manifold Pipe
Y-Type Manifold Pipe
Site pipe
Site pipe
Outdoor unit
Inlet
Y-type Manifold Pipe
Outlet 2
Outlet 1
To other manifold
pipe or indoor unit
Y-type manifold pipe is equipped with auxiliary tubes to adjust the diameter of different pipes. If the
dimension of the pipe selected for site use is different from the dimension of manifold pipe joint, use the pipe
cutter to cut from the middle of the pipe with different dimensions, and deburr as well. Please see below.
Cut from the middle
Fitting Pipe for
Indoor unit
Flaring Nuts
Fitting Pipe
Spanner
Torque Spanner
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