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
-111-
B
φ 9.52