Performing Leak Test & Insulation - Samsung AC***KNZDCH/AA 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 R-410A, it's responsible of installer
to pressurize the whole system with nitrogen (using a pressure regulator) at a pressure above 595 PSI (4.1MPa).
LEAK TEST WITH R-410A (after opening valves)
Before opening valves, discharge all the nitrogen in the system and create vacuum. After opening valves check leaks using a
leak detector for refrigerant R-410A.
Discharge all the nitrogen to create a vacuum and charge the system
CAUTION
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 T13.0mm (0.51") or thicker
Acrylonitrile Butadien Rubber separately around each refrigerant pipe.
You can contact the gas side and liquid side pipes but the pipes should not be
pressed together tightly.
When contacting the gas side and liquid side pipe, use 1 grade thicker insulator.
Always make the seam of pipes face upwards.
NOTE
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/straps.
All refrigerant connection must be accessible, in order to permit
CAUTION
either unit maintenance or removing it completely.
Leak
check
NBR [T13.0mm (0.51") or thicker]
Insulation
Gas pipe
Indoor unit
CAUTION
13
Leak check
Insulation
Liquid pipe
Insulation pipe
Be sure to overlap
the insulation
Must fit tightly against
body without a gap.