10
START-UP & CALIBRATION
CHAPTER 7
The previous sections of this manual have involved comparatively static procedures – making
electrical connections and fitting pipe, etc. This section involves the dynamic process of starting up
and balancing the components of the system, including initiating water flow, making air and water
flow adjustments, etc.
Maximum performance and reliability is achieved when the prescribed air flow and vacuum or pressure levels are
maintained at the HDO3 system while the ozone injector is operating at a comparatively higher vacuum (measured in
inches of mercury, or “in.Hg”). Also, maintaining the correct water flow and hydraulic pressures will ensure the highest
possible level of dissolved ozone. The air from the air preparation system of the HDO3-I and HDO3-II flows toward the
ozone generator under pressure, and from the ozone generator under vacuum (created by the ozone injector). The change
from pressure to vacuum occurs at the SCFH meter of the air preparation system located on the bottom left side of the
HDO3 system. Where as, the air from the air preparation system of the HDO3-III is flowing
through
the ozone generator
under pressure, and
from
the ozone generator under a slight vacuum (created by the ozone injector). The change from
pressure to vacuum occurs after the stainless steel “Ozone Injector–Vacuum Control” needle valve located on the control
panel of the HDO3-III.
HDO
3
Series – Dissolved Ozone Generation System
Warning:
Disconnect the External Loop dry contact (see Appendix-Section A) from the ozone generator
while performing all start-up procedures.
Failure to do so may result in ozone escaping to atmosphere.
Step 1:
Make sure all isolation valves in the ozone water system are open (Figures 4-2 and 4-3 show recommended
isolation valve locations).
Step 2:
The main power switch of the HDO3 system, located on the Control Panel (see Appendix-Section A), should
be in the “OFF” position. Main power should be available to the HDO3 system.
Step 3:
Remove the Fill Port Cap of the vacuum break located on the backside of the HDO3 system and fill the Riser
Tube with clean water (no particulate matter) to the fill level, see Appendix-Section A
Step 4:
Re-install the Fill Port Cap, hand tight.
Note:
Do not over tighten as damage to PVC fittings may occur.
Step 5:
Completely open the contact tank backpressure valve, located towards the bottom backside of the HDO3
system (see Appendix-Section A), by turning it counter-clockwise.
Step 6:
Start-up hydraulics. Allow the water in the system to reach hydraulic equilibrium (contact vessel full, off-gas
vent operating, etc.) and observe for plumbing leaks. If the inlet water supply is not under pressure be sure the
HDO3 booster pump is flooded with water so that the booster pump will prime.
Notes: Water flow
must
be
established through the HDO3 system booster pump before operation. If the inlet water supply to the
HDO3 system is
not
under pressure the system may not completely fill with water until the HDO3
system is operational.
Step 7:
If the inlet water supply to the HDO3 system is pressurized, using a water pressure regulator with a pounds
per square inch (PSI) gauge, regulate the inlet water supply pressure to 20PSI maximum.
Note:
Backpressure
downstream
of the HDO3 system could affect this PSI reading.
Step 8:
Disconnect the green oxygen delivery line from the oxygen concentrator, located on the bottom left-hand side
of the HDO3 system.
Step 9:
Turn the main power switch of the HDO3 to the “ON” position. The HDO3 should energize giving power to
the booster pump, oxygen concentrator, ozone generator and dissolved ozone monitor/controller.
Step 10:
Adjust the oxygen concentrator flow meter located on the bottom left-hand side of the HDO3 system. This
standard cubic feet per hour (SCFH) air flow meter must be set to atmospheric pressure. See the “Air
Preparation Air Flow” line of the Operating Parameters chart Figure 7-2 for the set point of each HDO3
system.
Note: When the system is in normal operation the SCFH flow meter setting may drop due to
backpressure through the system. Do
not
re-adjust the flow meter.
Step 11:
Reconnect the green oxygen delivery line to the oxygen concentrator, which was removed in Step 7 above.
Step 12:
Switch the ozone generator power switch to the “ON” position located on the bottom of the ozone generator,
see Appendix-Section A.
Step 13:
If the inlet water supply to the HDO3 system is under pressure, slowly close the contact tank backpressure
valve until the needle of the “Low Pressure – Side Water” gauge reaches 20PSI. If the inlet water supply is
not under pressure slowly close the contact tank backpressure valve until the needle of the “Low Pressure –
Side Water” gauge is between 1-5PSI.
Step 14:
Adjust the feed gas flow meter, located on the Control Panel (see Appendix-Section A), of the HDO3 system.
See the “Feed Gas Flow Rate” line of the Operating Parameters chart Figure 7-2.
