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1)
At least every six months you should check the time of day setting. Power outages will cause the units
time clock to be inaccurate and backwashing will not occur at the planned time.
2) If your unit contains activated carbon, you must replace the carbon and gravel underbed at least every
three years. Replacement may be required sooner if the taste and odor being removed begins to
reappear in the treated water or you experience increasing pressure drop that is not resolved by
increasing the frequency of backwashing.
3) Filter Ag and Filter Sand will last indefinitely. It may be necessary to replace them if you experience
increasing pressure drop that is not resolved by increasing the frequency of backwashing or if water
quality diminishes due to contaminant bleed through.
4) Neutralizer media or calcite must be replenished at least annually. Mark the side of the mineral tank at
installation so the drop in media level may be monitored by shining a bright light behind the mineral
tank. Add media if the level has dropped by more than three inches.
5) Birm should be replaced when iron reappears in the treated water and backwashing does not improve
the water quality.
For the FBW ARSENIC test the treated water for arsenic every 6 months to ensure the system is
6)
functioning properly and to identify when the arsenic reduction media has become exhausted.
Satisfactory test results will be 10 ppb of arsenic or less. If unsatisfactory the filter will need to be re-
bedded.
TO REPLENISH OR REBED MEDIA:
1) Pressure must be relieved on the system by placing the bypass valve in the "Bypass" position (Figure
3) and rotating the manual backwash knob (Figure 4a) clockwise until the knob engages the program
wheel and water flows briefly to drain. Once water has stopped flowing to drain move on to next step.
2) Unplug the control valve from the electrical outlet to prevent it from advancing automatically.
3) Disconnect the control Valve from the bypass valve
4) Disconnect the drain line from the control valve
5) Unscrew control valve from mineral tank (IF REBEDDING ONLY - remove the distributor).
6) Siphon water from mineral tank (IF REBEDDING ONLY - Remove existing media and gravel).
7) IF REBEDDING ONLY - Rinse mineral tank and replace distributor, making certain that the
distributor basket sits in the center of the tank bottom.
8) Cover the top of the distributor tube to prevent media entering the tube during filling. Using a funnel,
pour filter media(s) into the mineral tank. (IF REBEDDING ONLY - Begin loading tank with the
gravel underbed. Filling the mineral tank 1/3 with water before loading gravel will cushion the
fall and ensure even distribution of the gravel and media. If using multiple filter media types,
load in the order of heaviest {most dense} to lightest {least dense}.) 12" – 14" of space MUST be
left empty at the top of the mineral tank to allow for media bed expansion during backwash and to
prevent filter media from being discharged through the drain line.
Maintenance
10
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