VENTING THE GAUGE SET
To connect the gauges to a charged system if the gauge set has not been purged with refrigerant, attach the service valves to the system and vent the hoses at the manifold body by opening the hand wheels to an open center hose for a few seconds allowing some of the system refrigerant to purge the hoses of air. If the center hose is fitted with a check valve it will not be purged and must be purged with the refrigerant supply before introducing charge.
TAPPING A CAN OF REFRIGERANT
Be sure the can of
VENTING THE CHARGE HOSE
To avoid pulling air or other contaminants into the system, it is necessary to vent the air from the hose that is used to carry
LIQUID OR VAPOR
Refrigerant is either a vapor or liquid. To supply vapor to a system, keep the refrigerant can in the upright position. To supply liquid to the system, invert the can, valve down. Be sure the can is handled carefully to ensure the correct refrigerant condition is supplied.
CHANGING CANS
Turn off the compressor and close the gauge hand wheel Remove the supply hose with check valve from the can tap. Open the valve on the empty can. Some pressure may be present. Wait until no pressure is observed. Remove the can tap from the can.
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