Duro clean IF Mode D'emploi page 15

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More than 90% of problems affecting the efficiency of a chemical iron free filter system can be identified in 9 minutes or less

by following this diagnostic schedule. Start with Step 1, then follow each step in sequence to ensure proper diagnostic

procedures.

1. Check for Proper Installation

Is the hydrocharger installed between well pump and pressure tank with arrow pointing toward pressure tank?

Is there a minimum of 6 inches on the hydrocharger inlet and 6 inches on the outlet of the straight pipe, free of pipe

fittings?

Is the check valve (if used) correctly located between the pump and the hydrocharger?

Is the pipe from the pressure tank to the filter unit attached to the inlet port of the control valve?

Is the pipe from the filter unit to the water heater attached to the outlet port of the control valve?

Is the drain line of adequate diameter? Drain line must be sized to prevent back pressure from reducing backwash

flow rate below minimum for the model installed. Typical examples of minimum drain line diameters are:

1/2" ID when drain is up to 15 ft from unit and backwash discharge point is lower than the control valve.

ii)

5/8" ID when drain is up to 15 ft from unit and backwash water discharge point is slightly higher than the

control valve.

iii)

3/4" ID when drain is 25 ft away and/or drain is installed overhead.

Has the drain line been "kinked"? A kinked drain line must be replaced.

Is the drain line installed in a way that it will freeze in cold weather?

If the system incorporates a standard air-to-water pressure tank, does it have the required deep well air volume

control (air release valve) and is it functioning? (Proper installation of this type of pressure tank should have inlet

from pump higher than outlet to service.)

2. Check pH, Iron and Manganese Content of Treated Water

Is the treated water pH reading less than 6.7 (8.2 when manganese is present)? If yes, replenish the media with MpH

adder and check the bed for "channelling".

3. Check Pumping Rate

Do not refer to a pumping rate curve for this data. Follow the instructions found on Page 3. Is the measured pumping

rate less than the backwash rate of the filter? If yes, increase the pumping rate by first reducing the system operating

pressure. If the pumping rate is still too low, replace the pump.

4. Check Hydrocharger for Proper Air Draw

Does air suction continue for 1/3 of the time the pump runs (do not confuse with 1/3 of the pressure range)? Turn the

water flow adjusting screw clockwise to increase the draw time and counter-clockwise to decrease the draw time.

5. Manually Stage Filter Control to Backwash Cycle

Does a "rush" of air precede the backwash water out of the drain line? (If no, proceed to Step 6). If yes, the system is

"air-logged". Disconnect power from the pump and allow the system pressure to drop to zero through the filter drain line.

Restore power and rebuild system pressure. Continue backwashing unit until the pump has completed two or three

pressure cycles. Stage control valve to the service position and check the hydrocharger draw time. Adjust draw for 1/3 of

pump cycle time.

6. Determine Other Uses of Water in Addition to Normal Domestic Purposes

(e.g. geothermal heating or cooling, swimming pool fill, lawn irrigation, farm animal watering, etc.) Have any high demand

water uses been added subsequent to the installation of the filter system or overlooked when originally sizing the

system? (If a high demand situation exists, resize the system using continuous service flow rate data.)

System Check List