Discharging System

A/C Refrigerant System (R-134a), Discharging

WARNING:
- Always use an Underwriter's Laboratory (UL) approved refrigerant recovery, recycling, recharging unit such as Kent-Moore ACR4, or equivalent, whenever discharging 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 charging or discharging an A/C system.

CAUTION:
- Always use separate refrigerant recovery, recycling, recharging servicing equipment for R-12 and R-134a systems. DO NOT use one piece of equipment for both R-12 and R-134a systems. The residual traces of refrigerant inside the equipment will contaminate and damage the equipment. Servicing equipment includes recovery, recycling, recharging unit, charging station, vacuum pump, manifold gauges, etc.
- DO NOT use R-12 servicing equipment on R-134a systems or R-134a equipment on R-12 systems or damage to both the vehicle, A/C system and servicing equipment may result. Use only equipment designed to meet Society of Automotive Engineers (SAE) standards
- R-134a and R-12 systems use different size service fittings. NEVER use adaptors to convert an R-12 fitting to R-134a size or R-134a fitting to R-12 size.

Note: Follow all safety measures when discharging or charging A/C refrigerant system [1][2]Service Precautions







Note: Ensure initial set-up has been performed on the refrigerant recovery, recycling, recharging unit before discharging A/C system.

- connect red high pressure hose -A- of refrigerant recovery, recycling, recharging unit to high side fitting on vehicle and open coupler valve
- connect blue low pressure hose -B- of refrigerant recovery, recycling, recharging unit to low side fitting on vehicle and open coupler valve

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

- following refrigerant recovery, recycling, recharging unit manufacturer's instructions, discharge A/C system into refrigerant recovery, recycling, recharging unit
- disconnect power supply from A/C clutch to prevent accidental compressor operation with A/C system discharged