bend or stretch them any more. Do not bend or stretch the pipes more than three times.
4. Do not bend the pipe while it is incased in the insulation. In this case, cut the insulation with a
sharp cutter as shown in Fig. 4.12, and bend it after exposing the pipe. After bending the pipe
as you want, be sure to put the heat insulating pipe back on the pipe, and secure it with tape.
Fig. 4.12
NOTICE!
(1) To prevent breaking of the pipe, avoid sharp bends. Bend the pipe with a radius of
curvature of 5.9 in. (150mm) or more.
(2) If the pipe is bent repeatedly at the same place, it will break.
4.3.3 Connecting the Pipe at the Indoor Unit
Detach the caps and plugs from the pipes.
NOTICE!
(1) Be sure to connect the pipe to the port on the indoor unit correctly. If the centering is improper,
the flare nut cannot be tightened smoothly. If the flare nut is forced to turn, the threads will be
damaged.
(2) Do not remove the flare nut until the connection pipe is to be connected so as to prevent dust
and impurities from coming into the pipe system.
1. While centering the pipe against the port on the indoor unit, turn the flare nut with your hand.
2. When connecting the pipe to the unit or removing it from the unit, please use both the spanner
and the torque wrench. (Fig. 4.13)
3. When connecting, smear both inside and outside of the flare nut with refrigeration oil, tighten it
by hand and then tighten it with the spanner.
4. Refer to Table 4.3 before tightening to determine the appropriate torque (too tight would
damage the nut and lead to leakage).
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