21
US Water Systems uses the “bubble method”. This is a visual method that works best for quick
and reliable H2O2 injection rates.
1. Set the proportional control on the Stenner injection panel to 50% using the knob on the
PCM.
2. Run water for 10-15 minutes.
3. Take a sample after the Catalytic Carbon tank (or at a sink). The water in the sample con-
tainer (preferably glass) should be full of bubbles immediately after the sample is taken
(looks similar to an Alka-Seltzer dissolving in a glass). If not the installer will adjust the pump
to 60%, run the water for 10-15 minutes and check again.
4. Continue adjusting the knob “up” in increments of 10% and allow the water to run for 10-15
minutes between samples until the sample container is full of bubbles. Once the container is
full of bubbles, it is an indicator that there is plenty of H2O2 in the water. BE SURE to allow
10-15 minutes between adjustments.
5.
Now continue the same sampling process but decrease the knob setting in 5% increments
allowing the water to run for 10-15 minutes between adjustments until there are just a few
bubbles in the sample container (20-30 defined air bubbles in the center of the solution in the
glass) that come to the top of the water level and dissipate immediately. This should be the
optimal H2O2 injection setting. The bubbles should be in the center of the glass and rise to
the top immediately. Bubbles on the outside of the glass are not considered in the visual in-
spection. Bubbles in the solution is what to look for. This is an indicator that there is a small
amount of residual H2O2 in the treated water and the contaminant is being oxidized. Once
this setting is determined the system will operate automatically.
Over the first 1-3 months it is important to monitor the H2O2 level in the storage/solution
tank and start to gain usage data that will help determine the H2O2 usage and when to
order replenishment H2O2 accordingly. This setting should be periodically checked
and adjusted due to changes in the aquifer (well) and loss of H2O2 concentration by deg-
radation. After 6-8 months the H2O2 can lose concentration, so only replenish the tank
to a level that can be used in 6-8 months to ensure the H2O2 concentration strength is
consistent.
There is a tamper proof screw that can be tightened when the H202 injection rate is
set. This screw will prevent the pump rate control knob from being moved. If this
screw is used be sure to loosen the screw before trying to adjust the pump rate
control knob.
Installation, Operation and Maintenance Manual
FSF-200-OG, FSF-250-OG, FSF-300-OG,
FSF-500-OG
Hydrogen Peroxide Injection Rate Adjustment Instructions
