SiE33-102
Refrigerant Piping
Installation Manual
145
2. Piping between
Main Unit (RXY-)
and Sub Unit (RXE-)
Be sure to open the cornered knock out hole on the left panel of the sub unit when connecting the
branch piping between outdoor units.
Note:
After brazing, pass the connection cable through the through-slots. Pass the connection cable through
the through-slots only with flange disconnected. (If the flange is still connected, the connector of the
connection cable will not pass through.)
3. Piping Limitation
Make sure to perform the piping installation within the range of the maximum allowable pipe length,
allowable level difference and allowable length after branching as indicated in chapter “Example of
connection”.
4. REFNET Joint
For installation of the refrigerant branching kit, refer to the installation manual delivered with the kit.
Mount the REFNET joint so that it branches either horizontally or vertically.
Mount the REFNET header so that it branches horizontally.
Location to disconnect: the
V groove part (Sub unit)
Knock out hole
(Knock out the hole using a hammer, etc.)
(V1844)
Cable(Low voltage)
Liquid line
Insulation material
Cab le (High voltage)
Gas line
Insulation material
RXY8,10
RXE8,10
Gas side
attached pipe
Flange
Flare nut
Liquid side
branch piping
(
φ
12.7)
Brazing
Gas side branch
piping (
φ
25.4)
(Main unit)
(Sub unit)
(V1845)
RXY16,20
(Main unit)
(Sub unit)
RXE8,10
Gas side attached pipe
Flange
Flare nut
Liquid side branch piping (
φ
12.7)
brazing
Gas side branch piping (
φ
25.4)
(V1846)
A
Horizontal
wires
A-arrow diagram
Up to ± 30
˚
or vertically.
B
Horizontal wires
B-arrow diagram
(V1847)
Si33-102.book Page 145 Tuesday, June 26, 2001 3:18 PM
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