A/C Refrigerant System (R-134a), Evacuating & Recharging

A/C refrigerant system (R-134a), evacuating & recharging


WARNING
- 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.


NOTE: Only a high pressure service valve is used for A/C system servicing. Perform all A/C system service operations (i.e. discharging, evacuating and recharging) through the high pressure service valve only.

Evacuating & recharging
Follow all safety measures, when evacuating and recharging the A/C refrigerant system.
- 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.
- After system recharge, manually rotate A/C compressor approx. 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.