Haier AB072XCBAA, Service Manual, Page: 103 / 181

1 TO 3
A1
A2
B1
B2
A1 A2 B1
Outdoor unit Indoor units
1 TO 2
A1
A2
B1
B2
A1 B1
Outdoor unit Indoor units
Admissible pipe length and drop between the units:
a. Max. single distance piping length of unit A 1
、
unit A2
、
unit AB1
、
unit B2: 25m;
b. Max. drop between A1 unit and A2 unit
、
B1unit and B2 unit:5m;
Refrigerant recharge:
Distribute pipes for unit A1
、
unit A2
、
unit B1
、
unit B2 are supplied 5m as standard, if it is longer than 5m,
recharge refrigerant as 35g/m.
Communication Wire connection:
1. The indoor unit whose liquid pipe is connected to A1 in A system is called unit A1, its communication wire
of A1(3)
、
A1(4) should be connected to A1(P)
、
A1(Q) respectively.
2. The indoor unit whose liquid pipe is connected to A2 in A system is called unit A2, its communication wire
of A2(3)
、
A2(4) should be connected to A2(P)
、
A2(Q) respectively.
3. The indoor unit whose liquid pipe is connected to B1 in B system is called unit B1, its communication wire
of B1(3)
、
B1(4) should be connected to B1(P)
、
B1(Q) respectively.
4. The indoor unit whose liquid pipe is connected to B2 in B system is called unit B2, its communication wire
of B2(3)
、
B2(4) should be connected to B2(P)
、
B2(Q) respectively.
Note: Because the customers themselves match the communication wire, and the P and Q are
nonpolar, the customers must use shielded communication wires.
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