Gree U-MATCH B Series, Руководство пользователя

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U-MATCH SERIES DC INVERTER AIR CONDITIONERS SERVICE MANUAL
63
3.1.2 Bending Pipes
(1) The pipes are shaped by your hands. Be careful not to collapse them.
Figure 3-2-4
(2) Do not bend the pipes in an angle more than 90°.
(3) When pipes are repeatedly bent or stretched, the material will harden, making it difficult to bend
or stretch them any more. Do not bend or stretch the pipes more than three times.
(4) 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 Figure 3-2-5, 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.
Figure 3-2-5
CAUTION!
①
. To prevent breaking of the pipe, avoid sharp bends. Bend the pipe with a radius of curvature of 150 mm
(5-7/8inch) or over.
②
. If the pipe is bent repeatedly at the same place, it will break.
3.1.3 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 dama ged.
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.
When connecting the pipe to the unit or removing it from the unit, please do use both the spanner
and the torque wrench. (Figure 3-2-6)
When connecting, smear both inside and outside of the flare nut with refrigeration oil, screw it hand
tight and then tighten it with the spanner.
Refer to Table 10 to check if the wrench has been tightened properly (too tight would mangle the nut
and lead to leakage).