System, Discharge/Evacuate and Recharge
A/C REFRIGERANT SYSTEM (R-134A), DISCHARGINGWARNING
Always use an Underwriter's Laboratory (UL) approved refrigerant/recovery/recycling/recharging unit such as Kent-Moore ACH4, 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 safety measures section when discharging the A/C refrigerant system.
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 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 a high pressure service valve is used for A/C system servicing. A low pressure service valve is not installed in the A/C system. 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.
- disconnect power supply from A/C clutch to prevent accidental compressor operation with A/C system discharged.
A/C REFRIGERANT SYSTEM (R-134A), EVACUATING AND RECHARGING
WARNING
- Always use an Underwriter's Laboratory (UL) approved refrigerant/recovery/recycling/recharging unit such as Kent-Moore ACR, 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 slate and local laws.
^ Always wear safely goggles when discharging, evacuating and recharging an A/C system.
Note!
Only a high pressure service valve is used for A/C system servicing. A low pressure service valve is not installed in the A/C system. 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.
Note!
Follow all safety measures in safety measures section 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.