Gree Ultra Heat GMV Multi VRF Series User Manual

Ultra Heat GMV Multi VRF_Heat Recovery Serial
14
4.3.3 Allowable pipe length and drop height among indoor and outdoor units
Y type branch joint is adopted to connect indoor and outdoor units. Connecting method is shown in
the figure below.
Remark: Equivalent length of one Y-type manifold is about 0.5m (1-3/4feet).
Fig.17
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 (1-3/4feet).
Equivalent length of mode exchanger depends on the using situation, for example, when using one
branch, the length is 1m (39-3/8 inch), when using N branches, the length is N meters.
.
R410A Refrigerant System
Allowable Value
m(feet)
Fitting Pipe
Total length (actual length) of fitting pipe
≤1000(3280-3/4)
L1+L2+L3+L4+…+L10+A11+A12+…+D21+D22
Length of farthest
fitting pipe m(feet)
Actual length
≤165(541-1/4)
L
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)
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)
——
Outdoor unit at lower(2)
≤40(131)
——

Gree Ultra Heat GMV Multi VRF Series Specifications

General

Brand	Gree
Model	Ultra Heat GMV Multi VRF Series
Category	Air Conditioner
Language	English