Haier AD96NAHAEA Service Manual page 17

(6) During welding,the gas pipe valve must be cooled down with a wet cotton cloth.
During welding of the distribution pipe
1.In case of brazing weld of joint,nitrogen must be filled in the pipe to prevent oxidization.
2.The refrigerant pipe should be newly-made and clean.During installation,do not let water and other
substance into the pipe.
3.Use two spanners to tighten the connecting nut.One spanner will make loose connection.
The torque moment should conform to the specified value.(Refer to the below)
Tube diameter
(mm)
12.70
Selection of tube material and size
Determinaltion of tube diameter (Refer to the diagram on next page for steps 1,2,3,4 and 5 below)
1.Tube between the outdoor unit and the first bypass(main tube):
The diameter of the main tube and the outdoor tube should be the same.
2. Tube between bypasses(sub-tube):
The diameter of the sub-pipe is determined according to the total capacity of all the connected
indoor units.But if it is larger than the capacity of the outdoor unit,the diameter should be determined
according the capacity of the outdoor unit.
Install the nonreturn loop and oil trap
1.Outdoor is lower
liquid nonreturn loop
17
Commercial Air Conditioner
Torque moment for
pre-installation (N.m)
49.0(5.0kgf m)
2.Outdoor is higher
Indoor
Outdoor
AD96NAHAEA, AP96NACAEA
Torque moment for
tightening up (N.m)
53.9(5.5kgf m)
Oil trap (one per
6m)
Indoor
Model: AU96NATAEA
Outdoor