iglu Inuit 6I, Installation Manual

Page: 58 / 73

58
PERFORMING THE REFRIGERANT GAS LEAK TEST

Use a manifold gauge for R-410A to prevent the inflow of foreign substances and resist internal pressure.

Pressure test with dry oxygen-free nitrogen only.
Apply pressure to the liquid side pipe and gas
side pipe with Nitrogen gas of 4.6 MPa (46.9
kgf/cm²)
Keep it for a minimum of 24 hours to check if the
pressure drops.
If the pressure drops, check if there is a gas leak.
Maintain 1.0MPa of the pressure before
performing vacuum drying and checking for
further gas leaks.
*Make sure to use a recommended bubble test
solution for Gas Leak Test. Soap water could
cause cracking of the flare
nuts or lead to corrosion of flared joints.
You may get injured when the joint on the high-
pressure side detaches and the gas encounters your
body. Make sure to tighten the joint to prevent such
accidents.
If you apply pressure of more than 4.6MPa, the pipes
may be damaged. Apply pressure using a pressure
regulator.
After applying Nitrogen gas, check the change of
pressure using a pressure regulator.
If the pressure is changed, apply soapy water to
check the leak. Check the pressure of the Nitrogen
gas again.
After checking the first gas leak, maintain 1.0MPa to
check for further gas leaks.