Gree GMV-VQ280WM/C-X Owner's Manual page 25

GMV Heat Recovery DC Inverter VRF
External diameter(mm)
Φ34.90
Φ38.10
Φ41.30
Φ44.5
Φ51.4
Φ54.1
REMARKS:
① The inner and outer surfaces of the pipeline shall be free of pinholes, cracks, skinning,
foaming, inclusions, copper powder, carbon deposits, green rust, dirt and severe oxide film,
and shall not allow obvious scratches, pits and spots. defect.
② Once the inside of the copper tube is cleaned and dried, the nozzle must be tightly sealed
with a cap, plug or tape.
3.3.3 Allowable pipe length and height difference 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.
L11: Length from the first branch to the nearest IDU;
L12: Length from the first branch to the farthest IDU;
Equivalent length of branch of IDU is 0.5m.
Total length (actual length) of connection pipe
Length between outdoor unit and
the farthest indoor unit(L)
R410A Refrigerant System
Thickness(mm)
—
Actual length
Equivalent
length
≥1.3
≥1.5
≥1.5
≥1.5
≥1.5
≥1.5
Fig.3.3.1
Length(m)
L1+L2+L3+L4+...+L12+a11+b12+...+d21+
≤1000
≤165
≤190
21
Type
1/2H
1/2H
1/2H
1/2H
1/2H
1/2H
Remarks
d22
L
—