E-
12
Performing leak test & insulation
A
B
No gap
NBR
(0.511inch(13mm)
or
thicker
)
Insulation cover pipe
Indoor unit
Be sure to overlap
the insulation
CAUTION
Must fit tightly against body
without any gap.
Insulation
Once you have checked that there are no leaks in the system,
you can insulate the piping and hose.
1
To avoid condensation problems, place
T0.511inch(13mm) or thicker
Acrylonitrile Butadien Rubber
separately around each refrigerant pipe.
Note
Always make the seam of pipes face upwards.
2
Wind insulating tape around the pipes and drain hose avoiding to compress
the insulation too much.
3
Finish wrapping insulating tape around the rest of the pipes leading to the
outdoor unit.
4
The pipes and electrical cables connecting the indoor unit with the outdoor
unit must be fixed to the wall with suitable ducts.
All refrigerant connection must be accessible, in order to permit
either unit maintenance or removing it completely.
CAUTION
LEAK TEST WITH NITROGEN (before opening valves)
In order to detect basic refrigerant leaks, before recreating the vacuum and
recirculating the R-410A, it’s responsable of installer to pressurize the whole
system with nitrogen (using a cylinder with pressure reducer)
at a pressure above 30 bar (gauge).
LEAK TEST WITH R-410A (after opening valves)
Before opening valves, discharge all the nitrogen into the system and create
vacuum. After opening valves check leaks using a leak detector for refrigerant
R-410A.
Leak test
Discharge all the nitrogen to create a vacuum and charge
the system.
CAUTION
Air Marketing Group LLC
141 Kinderkamack Rd, Park Ridge, NJ 07656 Tel: 201-782-1782 Fax: 201-782-1783 Web: www.amgair.com Email: [email protected]
