Dantherm 3500, Руководство по установке

Страница: 16 / 36

16
EN
Leakage Test
The Outdoor unit is filled with refrigerant R134a for the whole system. This unit is hermetically
sealed. The only access is through the two service valves located on the side of the unit.
The indoor unit and the piping is open and the connections need to be checked for leakage .
Check that each tube-both liquid and gas side tubes have been properly connected.
Remove the service valve caps from both liquid and gas side on the outdoor unit.
Check that both liquid and gas side service valves on the outdoor unit are kept closed at this
stage.
Connect a manifold valve with pressure gauges and dry nitrogen gas to the service port with
gas side (large valve.)
Be sure to use a manifold valve for leak testing. The high side manifolds must always be closed.
Pressurize the system with dry nitrogen gas to more than 10 bar.
Close the valve when the gauge reading reaches 10 bar.
Test the for flare connection with liquid soap
Bubbles indicate a leak, and the connection needs to be redone until no leakage remains.
After the system is found to be free of leaks relieve the nitrogen pressure by loosening the
charge hose connector at the nitrogen gas cylinder.
Charge hose
Nitrogen gas
cylinder (in vertical
standing position)
L o Hi
Manifold valve
Pressure
gauge
Place the nitrogen gas
cylinder in a vertical position
during this tes.
Leakage test