Haier AB422XCBAA Service Manual page 111

Special Installation Guide to 21000BTU indoor units on Free Multi system
Only for outdoor unit AU422XIBAA working with 21000BTU indoor units
1. Special accessory pipes for 21000BTU indoor units:
Changing pipe (1/2-5/8)
φ 12.7
2. Pipe installations:
A1
A2
B1
B2
3. Outdoor wiring diagram should be changed as the following:
Coil of solenoid vavle A2
should be changed to
connected with CN29.
Coil of solenoid vavle B2
should be changed to
connected with CN23.
By-pass vavle on both
system A and system B
should be pulled out and
not connected.
A
φ 15.88
Gas pipe φ 15.88
Liquid pipe φ 9.52
Gas pipe φ 15.88
Liquid pipe φ 9.52
Collecting pipe (1/4-3/8)
φ 6.35
φ 6.35
21000BTU indoor unit
21000BTU indoor unit
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B
φ 9.52