OGSI OG-75, Installation, Operation & Maintenance Manual

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Effective April 2006
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Internal Component Description
Equalization Valve A & B –
The Equalization Valves allow gas to pass between the beds at the end of each
pressurization cycle in order to increase the efficiency of the machine by
reducing the amount air needed to produce a unit of Oxygen.
Feed Valve A & B –
The Feed Valves allow Air to enter the machine and pressurize the beds
beginning the air separation/oxygen generation process. Only one of these
valves is open at any point in time.
Waste Valve A & B –
The Waste Valves allow the Nitrogen gas that has been trapped during the
previous adsorption cycle to be discharged back to the air. As with the Feed
Valves only one of these valves will be open at a time. They operate in
conjunction with the opposite side Feed Valve. For example, whenever the Feed
Valve on the A side of the machine is open, the Waste Valve on the B side will
also be open. The reverse is also true.
Drain Valve –
The Drain Valve allows condensate and waste material trapped in the filter to be
discharged automatically at fixed intervals by the PLC or at any time by
depressing the Manual Drain button.
Pressure Switch –
The Pressure Switch senses the Oxygen Pressure in the Oxygen Storage Tank
and will turn the Oxygen Generator On and Off automatically when it is in the
‘Automatic’ mode. The Pressure Switch comes set from the factory with a ‘Turn
Off’ point at 60 psig and a ‘Turn On’ point at 45 psig. Both the dead band
(difference between the Turn Off and Turn On points) and the points themselves
can be adjusted in the field or by our factory technicians prior to shipment.
Please call the factory for assistance in this area if you want to make changes.
Filter –
The filter keeps dust, dirt, and moisture from entering the sieve beds and
damaging the sieve.