Haier 1U71S2SG1FA Service Manual page 27

In the Case of Ceiling Already Exisls
(1) Install unit temporally
Put suspending bracket on the suspending bolt.
Be sure touse nut and washer at both ends of the bracket. Fix the bracket firmly.
(2) Adjust the height and position of the unit. (Refer to preparation for the installation (1) ).
(3) Proceed with ③ and ④ of "In the case of new ceiling".
⑤ Refrigerant Piping (As for outdoor piping, please refer to installalion manual of outdoor unit.)
• Outdoor is precharged with refrigerant.
• Be sure tosee 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 outsid of lflare 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 7 with seal.
Apple refrigerant oil
Pipe Size
φ6.35 1420-1720N.cm (144-176 kgf.cm)
9.52 3270-3990N.cm (333-407 kgf.cm)
12.7 4950-6030N.cm (490-500 kgf.cm)
15.88 6180-7540N.cm (630-770 kgf.cm)
19.05 9720-11860N.cm (990-1210 kgf.cm)
Torque spanner
Spanner
Piping joing
Table 1
Flare nut
Tighten Torque
Medium size seal pad ⑪ (accessory)
Cover the piping joint
with seal pad)
Clamp
Gas pipe
Liquid pipe
A (mm)
8.3-8.7
12.0-12.4
12.4-16.6
18.6-19.0
22.9-23.3
24
Insulator (accessory)
(For liquid pipe)
Insulator (accessory)
For gas pipe
Flare Shape
R0.4 - 0.8