DC Inverter Duct Type Unit
13
making it difficult to bend or stretch them any more. Do not bend or stretch
the pipes more than three times.
(3). When bending the pipe, do not bend it as is.
The pipe will be collapsed. In this case, cut the
heat insulating pipe 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
CAUTION!
①
. To prevent breaking of the pipe, avoid sharp bends. Bend the pipe with a radius of curvature of
150 mm or over.
②
. If the pipe is bent repeatedly at the same place, it will break.
4.3.3 Connecting the Pipe at the Indoor Unit Side
Detach the caps and plugs from the pipes.
CAUTION!
①
. Be sure to apply the pipe against 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.
Centering the pipe against port on the indoor unit, turn the flare nut with your hand.
CAUTION!
Hold the torque wrench at its grip, keeping it in the right angle with the pipe as shown in Fig.
4.13, in order to tighten the flare nut correctly.
When the flare nut is tightened properly by your hand, use a torque wrench to
finally tighten it.
Fig. 4.13
