15
Installation
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.
CA
Discharge all the nitrogen to create a vacuum and charge the system
Leak
check
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.
be pressed together tightly.
insulator.
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
Leak check
NBR [T13.0mm (0.51”) or thicker]
Insulation
Indoor unit
Be sure to
overlap the
insulation
Gas pipe
Insulation
Liquid pipe
Insulation pipe
CAUTION
All refrigerant connection must be accessible, in order to permit
either unit maintenance or removing it completely.
CA
body without a gap.
Performing leak test & insulation
DB68-11271A-02_IM_CAC Universal AHU Indoor_AA_EN_.indd 15 2022-09-15 오전 9:53:17
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