Carrier XCT7 Installations- Und Benutzerhandbuch Seite 20

Installation procedure
3.Pipe "c" diameter (main pipe between outdoor gather pipe and the first branch pipe).
Outdoor capacity
(kW)
38VS226174HQEE
38VS280174HQEE
38VS335174HQEE
Note:
When the distance from outdoor unit to the longest indoor unit is over 90m, the main pipe should be
enlarged in diameter.
Copper pipe selection:
Material
Pipe diameter
(mm)
Thickness(mm)
Material
Pipe diameter
(mm)
Thickness (mm)
Material
Pipe diameter (mm)
Long pipe and high drop
Thickness(mm)
1. Applicable range
Item
Single way total pipe length
Single way pipe length
Main pipe from outdoor to 1
Pipe length between outdoor units
Height difference between
indoor and outdoor units
Height difference between outdoor units (in the
same sys tem)
Height difference between indoor units
Unit pipe spec and connection method (unit: mm)
A.Outdoor unit
Diameter
Mode
l
(mm)
Ø 19.05
38VS226174HQEE
Ø 22.22
38VS280174HQEE
Ø 25.4
38VS335174HQEE
Main pipe
Gas pipe (mm) Liquid pipe (mm)
Ø 19.05
Ø 22.22
Ø 25.4
O type pipe: Soft pipe
Ø 6.35 Ø 9.52
0.8 0.8
Ø 19,05
Ø 22,22
1, 0 1, 0
Ø 19.05
1.0
branch
st
Outdoor is higher
Outdoor is lower
Gas pipe side
Connecting method
Flared joint
Flared joint and Brazing
Gas pipe (mm)
Ø 9.52 Ø 22.22
Ø 9.52 Ø 25.4
Ø 12.7 Ø 28.58
Ø 12.7
1.0
Hard pipe
Ø 25,4
Ø 28,58
1, 0 1, 0
Hard pipe
Ø 22.22 Ø 25.4
1.0 1.0
Model
Max.: 150m (Equal Length 175m)
Max.: 110m (Equal Length 135m)
Less than 10m to 1
Within 5m (better as horizontal)
Diameter
(mm)
Ø 9.52
Ø 9.52
Ø 12.7
13
Enlarged main pipe
Liquid pipe (mm)
Ø 12.7
Ø 12.7
Ø 15.88
Ø 15.88
1.0
Ø 31,8
1, 1
Ø 28.58 Ø 31.8
1.0
Outdoor
300m
branch pipe
st
Max. 50m
Max. 40m
Max. 15m
Liquid pipe side
Connecting method
Flared joint and Brazing
Flared joint
1.1