A/C SYSTEM SERVICE 1 A/C manifold gauge set Manifold valves Hose end valves Performance test ...
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Transcript of A/C SYSTEM SERVICE 1 A/C manifold gauge set Manifold valves Hose end valves Performance test ...
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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