A/C SYSTEM SERVICE

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A/C manifold gauge set Manifold valves Hose end

valves Performance

test Pressure

diagnosis Manifold

purging and disconnect

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THE NATIONAL REFRIGERANT RECYCLING RULE WAS PROPOSED DECEMBER 10,1992 AND AN ...THE RECOVERY OR RECOVERY/RECYCLING EQUIPMENT MUST BE CERTIFIED BY AN APPROVED 

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A/C SYSTEM SERVICE

Recovery Evacuation Recharging Leak Check Freon Quality Robinair 347788

Demo

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REFRIGERANT IDENTIFICATION

Follow equipment manufacturer’s instructions

Do not recover refrigerant with sealers

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Section 609 Purity Standards (hand out)Refrigerant Purity Standards-handout.docx

Identify

REFRIGERANT PASS/FAILMUST BE 98% TO RECYCLE

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A/C SEALANT DETECTOR MODEL 

AC Sealant Detection7

REFRIGERANT RECOVERY

Connect recycler to vehicle service ports

Set machine to recover If recovery equipment

does not automatically shut off- recover until system drops into slight vacuum

Shut off valves and observe pressures for 5 minutes

If pressure increases-repeat recovery

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THE FLOW DIAGRAM FOR A RECOVERY/ RECYCLING MACHINE SHOWING THE INTERNAL COMPONENTS AND THE PATH THAT REFRIGERANT TAKES DURING RECOVERY AND RECYCLING. (COURTESY OF ROBINAIR, SPX CORPORATION)

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EVACUATION

Drain and measure system oil recovered in recycler

Evacuate system after leak check has been performed

If system has been exposed to moisture:

Evacuate until: 500 microns 29.2 in. 20-30 mins. minimum

Add amount of oil removed

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RECHARGE

Determine system capacity Recharge system If recycler cannot fully charge

system (temp or pressure too high):

Shut off both manifold valves Start engine and turn on A/C

max Open doors/windows Charge remainder of refrigerant

through low side port without allowing pressure to exceed 50 psi

Close both valves and complete performance check

Disconnect hoses from vehicle

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THE BUBBLES IN A SIGHT GLASS WILL DISAPPEAR AT A POINT LOWER THAN THE PROPER CHARGE AMOUNT. HIGH-SIDE PRESSURE WILL INCREASE AT A POINT THAT THE SYSTEM IS ALREADY OVERCHARGED. (COURTESY OF TOYOTA MOTOR SALES USA, INC.)

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GO TO GOOGLE-TYPER134 PRESSURE CHART 14

ROBINAIR R & R MACHINE.PDF

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