Refrigerant Piping - Haier AU422XIBAA Service Manual

5. REFRIGERANT PIPING

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The Outdoor unit is precharged with R407c refrigerant.
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Refer to Fig.1, when connecting and removing piping from unit.
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For the size of the flare nut, please refer to Table 1.
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Apply refrigerant oil at both inside and outside of flare nut. Tighten by hand 3-4 turns then tighten as specified.
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Use torque specified in Table 1. (Too much force may damage the flare nut, causing gas leakage).
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Check piping joints for gas leakage. Insulate piping as shown in Fig. below.
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Cover joint of gas piping and insulator with seal.
Apply refrigerant oil
Torque spanner
spanner
Piping joing
Fig. 1. Flare nut
6. Installation of water drainage pipe if condensation pump is not being fitted
(1) Install water drainage pipe
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Pipe dia, shall be equal or larger than that of unit piping.(pipe of polyethylene; size: 25mm; O.D:32mm)
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Drain pipe should be short, with a downward slope at least 1/100 to prevent air blockage from occuring.
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If downward slope can not be made, take other measures to lift it up.
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Keep a distance of 1-1.5m between suspending brackets, ensure drain is kept straight.
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Use the self-provided stiff pipe and clip with unit. Insert water pipe into water plug until it reaches the white tape.
Tighten the clip until head of the screw is less than 4mm from hose.
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Wind the drain hose to the clip using seal pad.
Insulate drain hose in the room.
Tape (White)
Cautions for the drain water lifting pipe
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Installation height shall be less than 280mm.
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There should be a right angle within, 300mm from unit.
300mm max
Drain hose 1
(accessory)
Note
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The slope of water drain hose (1) shall be within 75mm, don't apply too much force on it.
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If several water hoses join together, do as per following proceedures.
Specifications of the water hoses shall meet the requirements for the unit running.
Medium size seal pad 11 (accessory)
(Cover the piping joint with seal pad.)
Clip
Insulator (accessory)
Insulator (accessory)
Gas pipe
Liquid pipe
1-1.5m
Slope over 1/100
✓
Clip
Self-provided stiff pipe
Suspending bracket
1~1.5m
drain water lifting pipe
Clip
(accessory)
Table 1
Pipe
size
3270~3990N . cm
9.52
3
( / ") (333~407kgf . cm)
8
6180~7540N . cm
8
15.88
(630~770kgf . cm)
5
(For liquid pipe) ( / ")
8
9720~11860N . cm
7
19.05
(For gas pipe)
(990~1210kgf . cm)
3
( / ")
4
Clip
Clip
(accessory)
Self-provided stiff pipe
(accessory)
Connect water hoses with a T joint.
Tighten
A(mm) Flare shape
torque
12.0~12.4
18.6~19.0
22.9~23.3
Large size seal pad
(accessory)
4mm max
R0.4 ~ 0.8