40 AS-D+—AS-P Series Instruction Manual
AirSep Corporation
13. Allow the oxygen generator to operate until the designed concentration
level is reached. Fully close the manual vent valve if the low
concentration oxygen gas no longer discharges from the receiver.
14. Set the AUTO/MANUAL icon on the ‘Oxygen Generator’ screen to auto
mode.
15. Observe the oxygen receiver pressure on the ‘Output and Parameters’
screen (Figure 4.6). When the pressure in the oxygen receiver
increases to approximately the auto-standby upper setpoint pressure,
the oxygen generator runs for five more cycles (approx. 15 min.) and
then enters standby. When delivery of product oxygen reduces the
pressure in the oxygen receiver below auto standby lower setpoint
pressure, the oxygen generator begins to cycle.
16. After the oxygen receiver pressurizes and the oxygen generator
enters the standby mode, the generator is ready to deliver oxygen to
your application. When using the product oxygen, adjust the pressure
regulator at the outlet of the oxygen receiver until the pressure of the
product oxygen meets the needs of your application.
5.5 OPERATION
The oxygen generator can be operated in AUTO or MANUAL mode depending
on the requirements of your application. To use product oxygen that meets the
specications for your model listed in the Appendix A of this instruction manual, set
the AUTO/MANUAL icon on the ‘Oxygen Generator Screen’ to AUTO to produce
oxygen only during times of the oxygen demand.
5.6 SHUTDOWN
1. Stop the flow of product oxygen from the oxygen receiver to your
application by fully closing all manual valves between the outlet of the
oxygen receiver and the inlet to your application.
2. Make sure the AUTO/MANUAL icon on the HMI is set to AUTO.
3. Allow the oxygen receiver to repressurize fully. When the oxygen
receiver repressurizes, after a time delay of five cycles (approx. 15
min.), the oxygen generator stops cycling and enters the standby
mode.
Allow the oxygen generator to enter standby during shutdown
to ensure that the oxygen receiver contains oxygen at design
concentration during the subsequent restart and also ensure that
the unit shuts down at the proper point in the cycle. Failure to wait
until the oxygen generator enters standby results in temporarily
reduced concentration oxygen during the subsequent restart.
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