Airwell YEVFD Series, Service Manual

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3. Pipe "c" diameter (main pipe, between outdoor gather pipe and the first branch pipe)
Model
Main pipe Enlarged main pipe
Gas pipe (mm) Liquid pipe (mm) Gas pipe (mm) Liquid pipe (mm)
Ø19.05 Ø9.52 Ø22.22 Ø12.7
Ø22.22 Ø9.52 Ø25.4 Ø12.7
Ø25.4 Ø12.7 Ø28.58 Ø15.88
Note:
When the distance from outdoor unit to the longest indoor unit is over 90m, the diameter of main
pipe should be enlarged.
Copper pipe selection:
Material O type pipe: Soft pipe
Pipe diameter (mm) Ø6.35 Ø9.52 Ø12.7 Ø15.88
Thickness(mm) 0.8 0.8 1.0 1.0
Material Hard pipe
Pipe diameter (mm) Ø19.05 Ø22.22 Ø25.4 Ø28.58 Ø31.8
Thickness(mm) 1.0 1.0 1.0 1.0 1.1
Long pipe and high drop
Model
Item
Outdoor
Single way total pipe length 300m
Single way pipe length Max.: 150m (Equal Length 175m)
Main pipe beween outdoor to 1st branch Max.: 110m (Equal Length 135m)
Pipe length between outdoors Less than 10m to 1st branch pipe
Height difference between
indoor and outdoor
Outdoor is upper Max. 50m
Outdoor is lower Max. 40m
Height difference between outdoors
(in the same system)
Within 5m (better be horizontal)
Height difference between indoors Max. 15m
1. Applicable range
Unit pipe spec and connection method (unit: mm)
A. Outdoor unit
Model
Gas pipe side Liquid pipe side
Diameter
(mm)
Connecting method
Diameter
(mm)
Connecting method
Ø19.05 Flared joint Ø9.52
Flared joint and Brazing
Ø22.22
Flared joint and Brazing
Ø9.52
Ø25.4 Ø12.7 Flared joint
AW-YEVFD335-H16
AW-YEVFD280-H16
AW-YEVFD220-H16
AW-YEVFD335-H16
AW-YEVFD220-H16
AW-YEVFD280-H16
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