Pipe Connection - Hitachi RAS-8FSXNS2E Installation & Operation Manual

◆ Example 2: Using piping connection kit

3.3 Pipe connection

Cover the end of the pipe appropriately when needs to be inserted through holes in walls and
roofs, etc.
Keep the ends of the pipes covered while other installation work is being carried out to avoid the
entry of dampness or dirt.
Do not place the pipes directly on the ground without appropriate protection or adhesive vinyl
tape to cover the ends.
Where the pipe installation is not completed for a certain amount of time, braze the ends of
the pipe to seal. Then fill it with oxygen-free nitrogen gas through a Schrader valve to avoid the
accumulation of humidity and/or contamination through dirt.

NOTE
• Where polyethylene foam insulation is used, a 10mm thick layer should be used for the liquid
pipe and between 15 and 20 mm for the gas pipe.
• Install the insulation after the pipe surface temperature has dropped to the same temperature
as that of the room, otherwise the insulation may melt.
Do not use insulating material that contains NH
the pipe and subsequently cause leaks.
Where the filter has supplied his own branches, these should be appropriately insulated to avoid
decreases in capacity in line with environmental conditions and dew on the surface of the piping
due to low pressure.
PMML0628 rev.0 - 05/2023
Outdoor Outdoor
Unit Unit
B A
d
e
Piping Connection Kit
First Branch
Multi-Kit
3
f h
g
Indoor Indoor
Unit Unit
A B
(ammonium), as it could damage the copper in
3
25