haier AB422BCBAA - Manual (Page 28)

Installation procedure
Install indoor unit
45 2
Specification of pipe
(mm)
Torque
Dimension of cone
A (mm)
Cone
*9.52
*15.88
12.0~12.4
18.6~19.0
3270~3990 Ncm
(333~407 kgf*cm)
9720~11860 Ncm
(990~1210 kg
*
fcm)
6.Installation of drain hose
(1)Install the drain hose
The diameter of the drain hose should be larger than or equal to the diameter
of connection pipe.
(Polyethylene pipe, dimension: 25mm, external diameter:32mm)
R0.4~0.8
A
90 0.5
5.Refrigerant pipe
[The proper thermal insulation must be treated to gas pipe and liquid pipe. If
not, it may cause water leakage.]
The outdoor unit is not charged with refrigerant.
When connecting the pipes to unit or dismantling the pipes from the unit,
do proceed as the figure shown, use spanner and torque pincers together.
For the dimension of the cone-shaped screw nut, please referring to
Table 1.
When connecting pipes, both the inner or the outside of the cone-shaped
screw nut should pasted with refrigerant oil. Use hands to twist it for 3~4
circles, then tighten it.
According to Table 1 to confirm the fasten torque. (fasten too tight may
damage the screw nut leading to leakage)
After check if the connection pipes leaks, then perform thermal insulation
treatment, as the following figure shown.
Only use seal cushion to bind the joint between gas pipe and the insulation
parts.
Medium seal
cushion (accessory)
(use seal cushion to
bind the pipe joint)
Clamp
Thermal insulation part (accessory)
(for liquid pipe)
Thermal insulation part (accessory)
(for gas pipe)
Liquid pipe
Gas pipe
Pipe joint
Spanner
Cone-shaped screw nut
Torque spanner
Paste refrigerant oil here