Haier MRV II - 1. Working preparation before commissioning

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Refrigerant piping length and height difference
Items Max.piping(
m)
Total piping length 250 La+Lb+Lc+LA+LB+LC+LD+LE+LF+L
G+LH+L1+L2+L3+L4+L5+L6
Actual(100)
Max. piping
length
Equivalent(
125)
LA+LB+LC+LD+ LG+LH+ L6
Max.piping length
after the first
branch
50 LG+LH+ L6
Main piping actual
length
70 LD
Height difference
between indoor
units
20 ------
Height difference
between outdoor
units
0 ------
① Oil equalization pipe (L1～L3)：L1≤5m L2≤5m L3≤5m；
② Balance pipe (L1'～L3')：L1'≤5m L2'≤5m L3'≤5m
③ Gas pipe ,liquid pipe：La+Lb≤5m Lb＋Lc≤5m Lb＋Ld＋Le≤5m Lb＋
Ld+Lf
Part 2
Height between indoor unit maxes at 20m
F
E
D
C
B
A
lowest indoor unit/ farthest indoor unit
L3
L2
L1
LF
L6
L5
LH
L4
LG
LE
LD
La
Lb
LB
LA
Lc
LC
≤ 50m
the first branch
50m（ if the indoor unit
is higer, it is 40m)
≤ 75m
MASTER
UNIT
SLAVE
UNIT
SLAVE
UNIT
SLAVE
UNIT