Performing The Refrigerant Gas Leak Test - Samsung RD VHXF Series Installation Manual

installing the unit

PERFORMING THE REFRIGERANT GAS LEAK TEST

• Use tools for R410A to prevent the inflow of foreign substances and resist against the internal pressure.
• Do not remove the core of filling port.
• Use dry Nitrogen gas as doing an airtight test like below.
Liquid side pipe
Gas side pipe
Apply pressure to the liquid side pipe,
gas side pipe and oil balancing pipe(only
for module) with Nitrogen gas of
4.1MPa(594.6psi).
Keep it for minimum 24 hours to check if
the pressure drops.
If the pressure drops, check if there is gas
leak.
Maintain 1.0MPa(145psi) of the
pressure before performing vacuum drying
and check further gas leak.
• Perform a Nitrogen gas leak test the service valve of the outdoor unit closed.
• Use both liquid side pipe and gas side pipe when charging the Nitrogen gas.
CAUTION
• If the pipe is filled in a short time with a highly excessive pressure of Nitrogen gas, the
pipes may be damaged. Make sure to use a regulator to prevent the high pressure
Nitrogen gas over 4.1MPa(594.6psi) into the pipe.
40_ installing the unit
Gas side
Filling port
Gauge manifold
Liquid side
Pressure regulator
(Mandatory)
Oil balancing valve
If you apply pressure more than 4.1MPa(594.6psi),
the pipes may be damaged.
Apply pressure using pressure regulator.
After applying Nitrogen gas, check the change of
pressure using pressure regulator.
If the pressure is changed, apply soapy water to check
the leak. Check the pressure of the gas again.
After checking first gas leak, maintain 1.0MPa(145psi) to
check further gas leak.
Nitrogen gas