Heating and Air Conditioning: Service Precautions

REFRIGERANT SYSTEM SERVICE EQUIPMENT

WARNING:
- EYE PROTECTION MUST BE WORN WHEN SERVICING AN AIR CONDITIONING REFRIGERANT SYSTEM. TURN OFF (ROTATE CLOCKWISE) ALL VALVES ON THE EQUIPMENT BEING USED BEFORE CONNECTING TO, OR DISCONNECTING FROM THE REFRIGERANT SYSTEM. FAILURE TO OBSERVE THESE WARNINGS MAY RESULT IN PERSONAL INJURY OR DEATH.
- REVIEW THE WARNINGS AND CAUTIONS IN THE FRONT OF THIS SECTION BEFORE PERFORMING THE FOLLOWING OPERATION. FAILURE TO FOLLOW THE WARNINGS AND CAUTIONS COULD RESULT IN POSSIBLE PERSONAL INJURY OR DEATH.

RECOVERY / RECYCLING STATION

Refrigerant Recovery/Recycling Station Typical:

When servicing the A/C system, an R-134a refrigerant recovery/recycling/charging station that meets SAE standard J2210 must be used. Contact an automotive service equipment supplier for refrigerant recovery/recycling/charging equipment. Refer to the operating instructions supplied by the equipment manufacturer for proper care and use of this equipment.

MANIFOLD GAUGE SET

CAUTION: Do not use an R-12 manifold gauge set on an R-134a system. The refrigerants are not compatible and system damage will result.

Manifold Gauge Set Typical:

A manifold gauge set may be needed with some recovery/recycling/charging equipment. The manifold gauge set should have manual shut-off valves, or automatic back-flow valves located at the service port connector end of the manifold gauge set hoses. This will prevent refrigerant from being released into the atmosphere.

MANIFOLD GAUGE SET CONNECTIONS

CAUTION: Do not use an R-12 manifold gauge set on an R-134a system. The refrigerants are not compatible and system damage will result.

- LOW PRESSURE GAUGE HOSE - The low pressure hose (Blue with Black stripe) attaches to the low side service port. This service port is located on the suction line near the A/C compressor.
- HIGH PRESSURE GAUGE HOSE - The high pressure hose (Red with Black stripe) attaches to the high side service port. This service port is located on the liquid line fitting at the receiver/drier.
- RECOVERY/RECYCLING/EVACUATION/ CHARGING HOSE - The center manifold hose (Yellow, or White, with Black stripe) is used to recover, evacuate, and charge the refrigerant system. When the low or high pressure valves on the manifold gauge set are opened, the refrigerant in the system will escape through this hose.