Performing Leak Test & Insulation - Samsung NS 4CREA Series User & Installation Manual

Performing leak test & insulation
Leak test
 LEAK TEST WITH NITROGEN (before opening valves)
In order to detect basic refrigerant leaks, before recreating
the vacuum and recirculating the R22, 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 R22 (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 R22.
CAUTION
Discharge all the nitrogen to create a vacuum and
charge the system.
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 T13.0 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.
CAUTION
All refrigerant connection must be accessible, in order
to permit either unit maintenance or removing it
completely.
No gap
NBR(T13.0 or thicker)
Insulation cover pipe
Insulation pipe
Indoor unit
Be sure to overlap
the insulation
CAUTION
Must fit tightly against body
without any gap.
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