Water-cooled Heat Recovery DC Inverter VRF
8
4.2.3 Allowable pipe length and dropping height among indoor and outdoor units
Y type branch joint is adopted to connect indoor and outdoor units. Connecting method is shown
as the figure below.
Remark: Equivalent length of one Y-type manifold is about 0.5m (1-3/4ft.).
Fig.4.2.3
H
：
Height difference between indoor unit and outdoor unit.
L12: 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 (1-3/4ft.).
Equivalent length of
mode exchanger
depends on the using situation, for example, when using
one branch, the length is 1m(39-3/8in.), when using N branches, the length is N meters.
R410A Refrigerant System
Allowable Value m(ft.)
Fitting Pipe
Total length (actual length) of fitting pipe
≤300(984-1/4)
L1+L2+L3+L4+…+L10+A11+A12+…+D
21+D22
Length of farthest
fitting pipe m(ft.)
Actual length
≤165(541-5/16)
L
Equivalent length
≤190(623-3/8)
-
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)
L12-L11
Equivalent length from the first branch to the
furthest piping (1)
≤40(131-1/4)
L7+L8+L10+D22
Height difference
between outdoor unit
and indoor unit
Outdoor unit at upper(2)
≤50(164-1/16)
-
Outdoor unit at lower(2)
≤50(164-1/16)
-
Height difference between indoor units
≤30(98-7/16)
h1
Maximum length of Main pipe(3)
＜
90(295-1/4)
L1
From IDU to its nearest branch (4)
≤40(131-1/4)
A11,A12,B21,B22,D21,D22
Summary of Contents for GMV-WQ120WM/A-F
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