A/C SYSTEM MAINTENANCE - CONTINUED
DO NOT charge the A/C system with liquid refrigerant through the compressor suction ports. This could
Charging should be performed at air temperatures of 70°F (21°C) and above. Changes in ambient air
temperature will affect the system's ability to take a charge and will vary gauge readings.
When adding a partial charge to the A/C system, if there is no evidence of air in the system and there are
no system leaks, it is not necessary to discharge and evacuate the A/C system.
Operating A/C system periodically during the off-season will lubricate the seals and reduce the possibil-
ity of refrigerant loss.
Up to 7 oz. (200 g) of refrigerant loss per year is considered normal.
Steps 1 through 3 only need to be performed if a partial charge is being done.
Connect manifold gauge set (1) low-side hose (4) to suction (low) side of A/C compressor.
Connect manifold gauge set (1) high-side hose (5) to discharge (high) side of A/C compressor.