Haier AH1-070B Manual page 22

Piping maintenance
During installation, provide maintenance as specified in the table in order to prevent water, foreign matter and dust
from entering the pipes.
Location Work period
More than 1 month
Outdoors
Less than 1 month
Indoors ——
Note
Particularly when a pipe is to penetrate through a wall or extend to outdoors, make sure foreign matter and dust
etc cannot enter the pipe.
Attention item for piping connection
• To connect a pipe to or remove it from the connection kit, do use pliers for screws and torque spanner;
• When installing the connection kit, please fix the box and connecting pipes in an efficient way to avoid shaking
when changing connection kit.
• For the sizes of the flares, please refer to <Table-1>.
<Note>
• For connection at a flare, apply ester or ether oil to the flare (both inner surface and outer surface). Apply such oil
for 3 to 4 times and insert the screw in the first use
• The tightening torque for the flare is given in <Table-1>.
If no torque wrench is available, act as the follows.
Use a spanner to tighten the nut of the flare to a position where the tightening torque sharply increases.
The tightening angle for the position where the tightening torque sharply increases <Table -2>.
After the work, make sure there is no air leakage.
<Table-1>
Tube size Tightening torque (N.m) Machined flare size A (mm)
Ø6.35 14.2~17.2
Ø9.52 32.7~39.9
Ø12.7 49.5~60.3
Ø15.88 61.8~75.4
Ø19.05 97.2~118.8
Maintenance method
Screw
Screw or strap
8.7~9.1
12.8~13.2
16.2~16.6
19.3~19.7
23.7—23.9
20
Flare shape