Unitary Duct Split Unitary Duct Split
15
13 Piping
a. Let the flare end of the copper pipe point at the screw and then tighten the screw
by hand.
b. After that, tighten the screw by the torque wrench unit it clatters (as shown in
Fig.18).
Fig.18
Table 6 Moments of Torque for Tightening Screws
Diameter of Pipe(mm)
Moment of Torque (N·m)
φ6.35
15-30
φ9.52
35-40
φ12
45-50
φ15.9
60-65
a. The bending degree of the pipe can not be too small; otherwise it will crack. And
please use a pipe bender to bend the pipe.
b. Wrap the exposed refrigerant pipe and the joints by sponge and then tighten
them with the plastic tape.
CUATION
！
①
. During the connection of the indoor unit and the refrigerant pipe, never pull any
joints of the indoor unit by force; otherwise the capillary pipe or other pipe may crack,
which then would result in leakage.
②
.
The refrigerant pipe should be supported by brackets, that is, don’t let the unit
withstand the weight of it.
