Samsung AM***MXWA Series - Air Tightness Test and Vacuum Drying; Air Tightness Test Procedure

ENGLISH-61
02 INSTALLING THE PRODUCT
Air tightness test and vacuum drying
Air tightness test
 Use tools for R-410A to prevent the inow of foreign substances and resist against the internal pressure.
 Do not remove the core of lling port.
 Use Nitrogen gas for air tightness test as shown in the illustration.
Manifold gage
Filling port
High pressure gas pipe
Liquid pipe
Low pressure gas pipe
Nitrogen gas
Apply pressure to the liquid side pipe and gas side pipe
(when installing outdoor units in module) with Nitrogen
gas at 4.1MPa.
If you apply pressure at more than 4.1MPa, pipes may get
damaged. Apply pressure with pressure regulator and pay
attention to the pressure of the nitrogen.
Keep it for minimum 24 hours to check if pressure drops.
After applying Nitrogen gas, check there's any change of
pressure, using a pressure regulator.
If the pressure drops, check for gas leakage.
If the pressure is changed, apply soap water to check for leakage
and check the pressure of the nitrogen gas again.
Maintain 1.0MPa of the pressure before performing
vacuum drying and check for further gas leakage.
After checking the rst gas leakage, maintain 1.0MPa to check for
further gas leakage.
• Perform a Nitrogen gas leak test with the service valve of the outdoor unit closed.
• Whenchargingthenitrogengas,chargeitfromtheboth(high•lowpressure)sides.
• If the pipe is lled in a short time with a highly excessive pressure of Nitrogen gas, the pipes may get damaged.
Make sure to use a regulator to prevent the high pressure Nitrogen gas, over 4.1MPa, from entering into the pipe.
CAUTION