Haier MRV II Instruction Manual page 26

1.1.2 Outdoor pipe connection explanation
（take four outdoors in combination as an example）
SLAVE
UNIT
1.1.3 Outdoor pipe size checking
AU78N
Model MTAH
A
Capacity
8
（HP）
Φ28.5
Gas pipe
(mm)
8
Liquid
pipe
Φ12.7
(mm)
Oil
equalizat
——
ion pipe
(mm)
Balance
pipe
——
（mm）
SLAVE
UNIT
L3 L2
Oil equalization Oil equalization
pipe ∮ 9.52
pipe ∮ 9.52
L3'
L2'
Balance pipe ∮ 19.05
Balance pipe ∮ 19.05
Le
Lf
AU96N AV16NMT
MTAHA AHA
10 16
Φ38.1(Φ2
Φ28.58
8.58×2)
Φ15.88(Φ
Φ12.7
12. 7×2)
—— Φ9.52
—— Φ19.05
SLAVE MASTER
UNIT UNIT
L1
Oil equalization
pipe ∮ 9.52
L1'
Balance pipe ∮ 19.05
La
Lc
LA
Lb
Ld
Third gather pipe at
Third gather pipe at
outdoor side
outdoor side
AV18NMT AV20NMT
AHA AHA
18
Φ38.1(Φ2 Φ38.1(Φ2
8.58×2) 8.58×2)
Φ15.88(Φ Φ19.05(Φ
12. 7×2) 12. 7×2)
Φ9.52 Φ9.52
Φ19.05 Φ19.05
- 27 -
Liquid pipe
gas pipe
To indoor
unit
Third gather pipe at
outdoor side
AV24NMT
AHA
20 24
Φ38.1(Φ2
8.58×3)
Φ19.05(Φ
12.7×3)
Φ9.52
Φ19.05
Part 2
AV26NMT
AHA
26
Φ44.5(Φ2
8.58×3)
Φ22.22(Φ
12. 7×3)
Φ9.52
Φ19.05