Revised 5/14/2020
NOTE: DO NOT intertwine signal cable with
other wires. While bundling these items
together, do not intertwine or cross the signal
cable with any other wiring.
Refrigerant Piping
Connection
Page 13
Fig 7.8
Torque Requirements
Outer Diameter of Pipe (inch)
Tightening Torque (ft/lb)
Add. Tightening Torque (ft/lb)
1/4"
11 ft/ lb
11.8 ft/ lb
3/8"
18.4 ft/ lb
19.18 ft/ lb
1/2"
25.8 ft/ lb
26.55 ft/ lb
5/8"
33.19 ft/ lb
34.67 ft/ lb
NOTE: Use both a spanner and a torque
wrench when connecting or disconnecting
pipes to/from the unit.
NOTE ON MINIMUM BEND RADIUS
Carefully bend the tubing in the middle
according to the diagram below.
DO NOT
bend the tubing more than 90° or more
than 3 times.
Bend the pipe with thumb
min-radius 3.9”
6. After connecting the copper pipes to the
indoor unit, wrap the power cable, signal
cable and the piping together with binding
tape.
7. Thread this pipeline through the wall and
connect it to the outdoor unit.
8. Insulate all the piping, including the valves of
the outdoor unit.
Fig 7.7
CAUTION
• Fully wrap insulation around the piping.
Direct contact with the bare piping may
result in burns or frostbite.
• Make sure the pipe is properly
connected. Over tightening may
damage the bell mouth and under
tightening may lead to leakage.