Manual - G5Twin - 2011.indd

Additional Machine Usage

PURGING NON-CONDENSABLES FROM RECOVERY CYLINDERS

In the event that the Recovery Cylinder pressure is higher than expected, or if the recovery process seems slower than usual, use an external gauge (not the gauge on the G5Twin) and a Refrigerant

Pressure/Temperature chart to check for the presence of non-condensable gases in the cylinder.

You can bleed/purge non-condensables into another cylinder following this procedure:

1. The Recovery Cylinder must remain undisturbed for at least 24 hours for the non-condensables to rise to the top of the cylinder.

2. Through a Manifold Gauge Set, connect the Recovery Cylinder Vapor Port to the Vapor Port of a second recovery cylinder.

3. Consult a Refrigerant Pressure/Temperature chart, and check the temperature of the Recovery

Cylinder to determine what the pressure should be.

4. While the pressure is higher than the pressure on the chart, slowly open the Vapor Port to bleed off excess pressure until it is about 5 psi (0.35 Kg/cm

2

) above the pressure listed on the chart.

5. Close the valves and let the cylinder stand still for 10 minutes. Repeat if necessary.

⚠ NOTICE

The US EPA only allows purging if done into a secondary cylinder. Once a recovery cylinder has refrigerant inside, it may never be opened directly to atmosphere.

CHANGING BETWEEN REFRIGERANT TYPES

Appion refrigerant recovery machines are unique in that there is no refrigerant directly introduced into the compressor crankcase. This allows the G5Twin to easily and efficiently clear out refrigerant at the end of the recovery process. However, as with all recovery machines, trace refrigerant vapors may remain and should be cleared out when switching between different types of refrigerant.

When you are changing between refrigerant types, any refrigerant remaining in the recovery machine should be drawn into a deeply evacuated cylinder before switching. Then, to prevent any crosscontamination, it is recommended that a vacuum pump be connected to the output port of the G5Twin

(keep the Input Valve closed and the Output Valve open), and run the vacuum pump to completely evacuate the machine of any trace refrigerant vapors.

STORING THE MACHINE BETWEEN USES

When storing the machine between recovery jobs, trace refrigerant vapors can continue to wear on the internal components of the machine. If the machine is fully sealed (closed valves or port covers), storing the machine in a hot truck can cause the trace vapors to expand and wear on the components further.

To minimize wear during storage, leave both valves on the G5Twin open. You can use port caps/covers to protect the machine from dirt, but make sure they do not have an airtight seal.

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G5TWIN OPERATION MANUAL

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