GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
48
Equivalent length from the first branch to the
furthest piping (1)
Height difference
between outdoor unit
and indoor unit
Height difference between indoor units
Maximum length of Main pipe(3)
From IDU to its nearest branch (4)
NOTICE!
①
Normally, the pipe length from the first branch of IDU to the farthest IDU is 40m(131-1/4feet).
Under the following conditions, the length can reach 90m (295-1/4feet).
a. Actual length of pipe in total: L1+L2x2+L3x2+L4x2+…+L9x2+a+b+…+i+j≤1000m (3280-
3/4feet).
b. Length between each IDU and its nearest branch a, b, c, d, e, f, g, h, i, j≤40m (131-
1/4feet).
c.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: L10-L11≤40m (131-1/4feet).
②
When the outdoor unit is at upper side and height difference is more than 50m, please consult
company for the related technical requirement.
③
When the maximum length of the main pipe from ODU to the first branch of IDU is≥90m
(295-1/4feet), then adjust the pipe size of the gas pipe and liquid pipe of main pipe according to the
following table.
Liquid pipe size mm(inch)
No need to enlarge pipe size
No need to enlarge pipe size
No need to enlarge pipe size
No need to enlarge pipe size
No need to enlarge pipe size
④
If the length between an IDU and its nearest branch is above 10m (32-3/4feet), then double the
size of the liquid pipe of IDU (only for the pipe size that is≤6.35mm (1/4inch).
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