Ultra Heat GMV Multi VRF
15
Remark: Equivalent length of one Y-type manifold is about 0.5m (1-3/4feet).
Fig.17
L10: Length from the first branch to the farthest IDU;
L11: Length from the first branch to the nearest IDU;
Equivalent length of branch of IDU is 0.5m (1-3/4feet).
.
R410A Refrigerant System
Allowable Value
m(feet)
Fitting Pipe
Total length (actual length) of fitting pipe
≤1000(3280
-3/4)
L1+L2+L3+L4+…+L9+a+b+…+i+j
Length of farthest
fitting pipe m(feet)
Actual length
≤165(541
-1/4)
L1+L6+L7+L8+L9+j
Equivalent length
≤190(623
-1/4)
Difference between the pipe length from the
first branch of IDU to the farthest IDU and the
pipe length from the first branch of IDU to the
nearest IDU
≤40(131
-1/4)
L10-L11
Equivalent length from the first branch to the
furthest piping (1)
≤40(131
-1/4)
L6+L7+L8+L9+j
Height difference
Outdoor unit at upper(2)
≤
50(164)
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