the flow meter. The flow should be set with the top of the ball in the meter between
30-50%. There is also a desiccant filter on the concentrated oxygen outlet tubing to
remove any residual moisture and particulate from the concentrator.
Ozone Generator:
The ozone generator takes the concentrated oxygen (O2) and converts some to
ozone (O3). This conversion is done using corona discharge, which is created by
putting a high voltage charge onto an electrode that is encircled by a dielectric,
glass tube. A corona (high energy field) is produced and the concentrated oxygen is
passed through the corona to make ozone. The ozone generation system will
operate continuously as long as the reclaim pump and oxygen concentrator are
running. There is an initial 30 second delay after the oxygen concentrator starts.
The ozone generation system must have a pressurized, oxygen gas feed to the
ozone cells. A pressure switch on the inlet oxygen feed will determine if the
pressure is a minimum of 7-8 psig and will shut down the ozone generator if not
enough pressure is available. A needle valve and pressure gauge on the front of the
generator are used to set the pressure to 8-9 psig. There is also a vacuum switch
on the ozone outlet to monitor whether the Mazzei Eductor is drawing in enough
ozone gas. If there is not enough vacuum, the ozone generator will not operate.
Other controls incorporated are monitoring the ozone cell temperature (must be
below 150 DegF) and an internal diagnostic check done by some of the generator
circuitry. These can also shut down the generator.
The amount of ozone generated can be varied by adjusting the Ozone Output
Potentiometer on the front of the generator panel. The POT increases or decreases
the strength of the corona, which varies the ozone concentration and output. The
POT is normally set for its maximum (the blue Ozone Output Light will be at its
brightest) and will produce up to an 8-10% concentration of ozone.
On the front of the ozone generator are the Power Switch to turn the generator only
on or off, and two breaker buttons to protect against overloads. There is a Door
Safety Switch that will cut power to the internals when the front door cover is
opened. (Note: Do not override the safety switch.) There are also three indicator
lights on the front. The green Transformer Power Light will be on & steady when the
high voltage transformers have power. The blue Ozone Output Light indicates how
much ozone is being produced. As the light gets brighter, more ozone is being
made. The red Ozone Fault light will be on when an internal fault has been
recognized. All other faults are indicated by all lights being off with the Power
Switch on. The type of fault will be indicated on the PLC text screen message in
the main reclaim control box.
Two cooling fans are used to keep the ozone cells cool. The fan on the right side
(facing the front) draws air into the cabinet and has a filter to trap particulate. The
fan on the left draws heated air out of the cabinet. Both fans will operate as long as
the Power Switch on the front of the generator is in the “On” position.
Caution:
Breathing concentrated ozone can create severe breathing problems.
Precautions must be made to prevent exposure to concentrated ozone.
