Operation CHARM: Car repair manuals for everyone.

A/C Refrigerant System, Evacuating and Recharging






A/C Refrigerant System, Evacuating and Recharging

CAUTION!
Always use an Underwriter's Laboratory (UL) approved refrigerant recovery/ recycling/recharging unit such as Kent-Moore ACR4, or equivalent, when evacuating and recharging an R-134a A/C system.

Any person who services a motor vehicle air conditioner MUST, by law, be properly trained and certified and use approved refrigerant recycling equipment. Technicians must complete an EPA approved recycling course to be certified.

State and local governments may have additional requirements regarding air conditioning servicing. Always comply with state and local laws.

Always wear safety goggles when discharging, evacuating and recharging an A/C system.

CAUTION!
Always follow manufacturer's instructions when using a refrigerant recovery/recycling/recharging unit.

Refer to R-134a safety measures prior to discharging or charging A/C refrigerant system => [ Safety Precautions ] Service Precautions.

Follow refrigerant recovery/recycling/recharging unit manufacturer's instructions for evacuating and recharging A/C system.

Evacuate refrigerant system for a minimum of 30 minutes.

When recharging A/C system, add correct amount of refrigerant and PAG oil to system => [ A/C Refrigerant System Capacities ] [1][2]Capacity Specifications.

After system recharge, manually rotate A/C compressor approximately 10 turns before starting engine. Start engine with A/C OFF. After idle speed has stabilized, switch A/C ON and let engine idle (compressor running) for a minimum of two minutes before raising engine speed.