Installation manual
7
RXYQ8~18P7W1BR1
VRVIII System air conditioner
4PW44039-1E – 07.2010
4
Branching the refrigerant piping
For installation of the refrigerant branching kit, refer to the
installation manual delivered with the kit.
Follow the conditions listed below:
- Mount the refnet joint so that it branches either
horizontally or vertically.
- Mount the refnet header so that it branches horizontally.
5
Piping length restrictions
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
"6.6. Example of connection" on page 8
.
6.5.
Protection against contamination when
installing pipes
-
Take measures to prevent foreign materials like moisture and
contamination from mixing into the system.
-
Great caution is needed when passing copper tubes through
walls.
-
Block all gaps in the holes for passing out piping and wiring
using sealing material (field supply). (The capacity of the unit
will drop and small animals may enter the machine.)
Example: passing piping out through the front
1
Horizontal surface
Installation period
Protection method
More than a month
Pinch the pipe
Less than a month
Pinch or tape the pipe
Regardless of the period
After all the piping has been connected, make sure there is
no gas leak. Use nitrogen to perform a gas leak check.
1
2
3
1
Plug the areas marked with "
".
(When the piping is routed from the
front panel.)
2
Gas side piping
3
Liquid side piping