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 discharging, evacuating or recharging 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 an A/C refrigerant system. Service Precautions


Discharging
Make sure initial set-up has been performed on recovery/recycling/recharging unit before discharging A/C system.





- Connect red high pressure hose -A- of refrigerant recovery/recycling/recharging unit to high pressure service valve (fitting) on vehicle and open coupler valve.
- Leave blue low pressure hose -B- of refrigerant recovery/recycling/recharging unit disconnected.

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

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.
- After emptying A/C system, disconnect power supply from A/C clutch -N25- (e.g. disconnect harness connector from A/C pressure switch -F129-) to prevent accidental compressor operation with A/C system discharged.