Robinair 34134Z Refrigerant Recovery, Recycle, Recharge Unit - Manual (Page 22)

© 2003 SPX Corporation
20
Use the following steps to purge unwanted air from the internal storage
vessel.
1. On the control panel, note the internal storage vessel temperature in the
ISV temperature display.
NOTE: The ISV temperature display can show Fahrenheit or Celsius
degrees. Refer to
Changing the Temperature Scale in this manual.
2. Use this temperature to find the correct refrigerant pressure on the
Temperature/Pressure Chart located in this manual or on the control panel.
3. Compare the pressure from the chart to the pressure shown on the unit’s
tank pressure gauge. If the pressure from the chart is lower than the gauge
pressure, the internal storage vessel contains air.
4. To purge the air from the internal storage vessel, press Mode until PURGE
AIR appears.
5. Press and hold the START/STOP button until the gauge pressure drops to the
correct pressure from the chart. Then release the START/STOP button.
6. Wait 5 minutes to allow the temperature and pressure to stabilize. Check
the temperature and pressure again.
7. If necessary, repeat the steps until the pressure is correct for the temperature.
After purging the air, recharge the system.
Operation
Purging Air from the Internal Storage Vessel
I
O
Start/Stop
Key
Mode
Key
Display
Screen
ISV Pressure
Gauge
Up
Arrow
Down
Arrow
ISV
Temperature
Display
Temp/Pressure
Chart