Haier HBU-42CH03 Operation & Installation Manual page 21

Installation Procedure
Center of ceiling hole Paper pattern
6
Screw (accessory)
Refrigerant piping
5
Outdoor is precharged with refrigerant.
Be sure to see the Fig.1, when connecting and removing piping from unit.
For the size of the flare nut, please refer to Table 1.
Apply refrigerant oil at both inside and outside of flare nut. Tighten it band tight 3-4 turns then tighten it.
Use torque specified in Table 1. (Too much force may damage flare nut, causing gas leakage).
Check piping joints for gas leakage. Insulate piping as shown in Fig. below.
Cover joint of gas piping and insulator
Apple refrigerant oil
Torque spanner
Table 1
Pipe size Tighten torque
1420~1720N . cm
6.35mm
(144~176kgf . cm)
3270~3990N . cm
9.52mm
(333~407kgf . cm)
6180~7540N . cm
15.88mm
(630~770kgf . cm)
9720~11860N . cm
19.05mm
(990~1210kgf . cm)
Screws at the piping outlet is fixed at the corner
of drain pan.
[Fix the paper pattern]
(As for outdoor piping, please refer to installation Manual of outdoor unit.)
7
Medium size seal pad 11 (accessory)
(Cover the piping joint with seal pad.)
spanner
Piping joing
Flare nut
A(mm)
8.3~8.7
12.0~12.4
18.6~19.0
22.9~23.3
Paper pattern
5
6
Screw (accessory)
with seal.
Clamp
Flare shape
R0.4 ~ 0.8
19
Insulator (accessory)
(For liquid pipe)
Insulator (accessory)
(For gas pipe)
Gas pipe
Liquid pipe
8
7