MICRO-AIR Artic Air 24 Guía de instalación descargar pdf (Pagina 41)

Completing The Evacuation and Charging

Once the vacuum pump has run for the required period of time, the system is assumed to be fully

evacuated. With the vacuum pump still running, tightly close both hand valves on the gauge set.

Once both hand valves are closed you can turn off the pump and use a 1/4 inch wrench to turn

the condensing unit Rotalock valve stems counterclockwise. Open both the Rotalock valves. As

you open the valves you will hear refrigerant rush into the rest of the system. Continue to open

the valves until they are fully back-seated (i.e. all the way out).

At this point you may wish to monitor the pressures of the system when you start it up. If so, turn

both valve stems in approximately 1/2 a turn. This allows the system pressure to travel into the

hoses while the system runs.

Removing The Gauge Set

When you are ready to remove the gauge set, turn the Rotalock valve stems counterclockwise

as far as they will go. This is the fully back-seated position. This position uses a metal-to-metal

seat to seal off the access port and the packing area around the valve stem. The valve is

designed to be firmly back-seated to ensure that the access port and stem do not leak. Use a

twisting force of approximately 5 foot-lbs. Replace the black plastic caps which cover the stems.

The gauge set is now isolated from the rest of the system. However, there is still a charge of

refrigerant in the hoses. You may use a recovery machine to remove this refrigerant or release it

into the atmosphere (legally permitted as a de-minimus release). To safely release the gas,

disconnect the white (center) hose from the vacuum pump and point it away from you. Slowly

open each hand valve and release the charge in that hose. Once the gas is out of the hose,

disconnect the gauge set from the Rotalock access ports and replace the hex acorn caps.

Your system is now fully charged and ready for use.

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MICRO-AIR Artic Air 24 Guía de instalación Pagina 41