Haier MRV II AV08NMVERA Installation Manual page 22

c. Allowable pipe length and height difference
outdoor1
L1
over 200mm
L1 ＜ 10m
L2+L3 ＜ 10m
L7+L14+L13 ＜ 40m
Single way total pipe length
Single way max. pipe length
Max. pipe length after 1
branch pipe
Main pipe actual length
Height difference between
indoors
Height difference between
outdoors
when the distance between outdoors is over
2m, the oil trap must be set (upright projecting
pipe, 200mm high)
outdoor2
outdoor3
L2
below 2m
below 2m
L3
over 200mm
Max. length
300
150
st
40
90
15
5
L4
L5
L7
Pipe in above figure
L1+L2+ L3+ L4+ L5+ L6+ L7+L8+ L9+ L10+
L11+ L12+ L13+ L14+ L15
L1+L3+ L5+ L7+ L14+ L13
L7+L13+L14
L5
————
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L8
L10
L6
L11
L9
L12 L13
L14 L15