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G1SINGLE OPERATION MANUAL
© 2023 APPION INC. - ALL RIGHTS RESERVED
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 G1Single) 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 o 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 G1Single to easily and eiciently 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 dierent 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 cross-contamination, it
is recommended that a vacuum pump be connected to the output port of the G1Single (with a closed ball
valve attached to the input port), 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, 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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