Allowable refrigerant piping length and height difference
a. Allowable pipe length and height difference
Single way total pipe length
300m
Single way max. pipe length
Max. 150m
Main pipe between outdoor to 1
st
branch
Max. 90m
Pipe length between outdoors
Less than 10m to 1
st
branch pipe
Outdoor is upper
Max. 50m
Height difference between indoor and
outdoor
Outdoor is lower
Max. 40m
Height difference between outdoors(in the same system)
Within 5m (better be horizontal)
Max. pipe length from 1
st
branch pipe to indoor
Max. 40m
Height difference between indoors
Max. 15m
b. Pipe length between outdoors
3
outdoor1
outdoor2
outdoor
3
L1
<
10m,
L2+L3
<
10m
Gas/liquid pipe:
1st gather pipe
2st gather pipe
Oil equalization pipe:
height difference between outdoors: h
<
5m
L5+L6
<
10m
Note: a. HZG-30/A includes HZG-20/A;
b. The connection pipe among outdoors can not be higher than the stop valve position;
c. The connection pipe among outdoors should be horizontal or be in a certain angle as
the below figure (less than 15degree).
19
Содержание MRV II AV08NMVERA
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