Haier AD88NAHAAA Operation And Instruction Manual page 35

INSTALLATION MANUAL FOR OUTDOOR UNIT
(6) During welding,the gas pipe valve must be cooled down with a wet cotton cloth.
(7)The maximum connnection pipe is 50 meters ,the maximum drop difference between indoor
unit and outdoor unit is 30 meters.
(8)It should installation the liquid check-ring and accumulator according to the outdoor unit and
indoor unit position.(see the attached diagram)
Diag1.outdoor unit below the indoor unit.
Liuid check-ring
outdoor unit
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
Base plate
indoor unit
Torque moment for tightening the nut
Torque moment for
pre-installation (N.m)
Tube fixing
panel
M4
Access hole cover
Diag2. Outdoor unit is above the indoor unit
indoor unit
34
M6
outdoor unit
Accumulator (set 1
per 6 meters)
Torque moment for
tightening up (N.m)