11
Installation Instructions
1. The outdoor unit with capacity level 18 can drive up to two sets of indoor units, the outdoor
unit 24 can drive up to three, while the outdoor unit 28 can drive up to four.
2. The sum of the capacity codes of the indoor units should be among 50%-150% of that of
the outdoor unit.
● Allowable Length and Height Fall of the Refrigerant Pipe
Table 5
Allowable Length
Refrigerant Pipe
18
24
28
18
24
28
Totlal Length(m)
30
60
70
L1+L2 L1+L2+L3 L1+L2+L3+L4
Max. Length for Single Unit(m)
15
20
20
LX
Max.
installation
altitude
Outdoor unit and indoor unit
5
10
10
H1
Indoor unit and indoor unit
5
5
5
H2
Table 6 Dimension of the Refrigerant Pipe of the Indoor Unit
Capacity Level of the Indoor Unit
Gas Pipe (mm)
Liquid pipe (mm)
07
、
09
、
12
Φ9.52
Φ6.35
18
Φ12.7
Φ6.35
24
、
28
Φ15.9
Φ9.52
● Piping between the Indoor and Outdoor units
1. Refer to Table 7 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.8).
4. The bending degree of the pipe cannot 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.
Ordinary
Wrench
Pipe
Flare Nut
Pipe
Torque
Wrench
Flare Nut
Pipe
Fig.8
Pipe