Robinair 178012K Recovery, Recycling, Recharging Unit - Manual (Page 17)

Model 178002K/178012K Recovery/Recycling/Recharging Unit
15
RECYCLING PROCEDURES
WARNING!
Always wear safety goggles when working with refrigerant. Use only
authorized refillable refrigerant tanks. Disconnect hoses with extreme
caution!
All hoses may contain refrigerant under pressure. Read and follow all
warnings at the beginning of this manual before operating the unit.
1. Be sure both valves on the tank are open.
2. Press and hold SHIFT/RESET and then press “1” to start the recycling process.
If the recovery tank is full, the display will show the message “FULL.” Press
HOLD/CONT to resume operation.
3. After about five (5) minutes of recycling, the tank temperature should equalize. You
can then purge non-condensables.
4. To purge non-condensables, check the air purge gauge to find the temperature of
the refrigerant. Use that temperature to find the correct pressure for that refrigerant
on the pressure/temperature chart on the top of the unit. Compare the pressure
from the chart to the pressure shown on the gauge. If the gauge pressure exceeds
the target pressure by more than 10 psi, open the air purge valve on the control
panel for about 30 seconds to release non-condensables from the tank. Then close
the air purge valve and allow the tank to stabilize for about 30 seconds. Check the
air purge gauge again. Repeat this step
as necessary during the recycling
procedure.
5. To stop recycling, close the tank’s
LIQUID valve. The unit will pull into a
vacuum and shut off automatically.
Diagram of Air Purge Gauge
Target Pressure of R-22 at 98° is 190 psig
INST0154
Non-
Condensables
Present
Acceptable Pressure Range
190 to 200 psig
Important!
You can stop
recycling in-
stantly by press-
ing HOLD/CONT
then SHIFT/
RESET, but this
can leave liquid
refrigerant in the
low side of the
unit. Closing the
tank’s LIQUID
valve is the
recommended
method.
Operating Instructions