9
(3) Allowable Length and Height Fall of the Refrigerant Pipe
Table 3
Allowable Length
Refrigerant Pipe
36
42
36
42
Total Length(m)
70
80
L1+L2+L3+ L4
L1+L2+L3+ L4+ L5
Max. Length for Single Unit(m)
20
25
LX
Max.
installation
altitude
Outdoor unit and
indoor unit
15
15
H1
Indoor unit and
indoor unit
7.5
7.5
H2
Table 4 Dimension of the Refrigerant Pipe of the Indoor Unit
Unit: mm
Capacity Level of the Indoor Unit
Gas Pipe
Liquid Pipe
09,12
Ф9.52
Ф6.35
18
Ф12.7
Ф6.35
21,24
Ф15.9
Ф9.52
(4) Piping between the Indoor and Outdoor Units
1) Refer to Fig.6 for the moments of torque for tightening screws.
2) Let the flare end of the copper pipe point at the screw and then tighten the
screw by hand.
3) After that, tighten the screw by the torque wrench unit it clatters (as shown in
Fig.6).
4) The bending degree of the pipe can not be too small, otherwise it will crack.
And please use a pipe tube bender to bend the pipe.
5) Wrap the exposed refrigerant pipe and the joints by sponge and then tighten
them with the plastic tape.
Fig. 7
