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APOLLO DISC-KLEEN FILTER OPERATIONS, MAINTENANCE AND TROUBLESHOOTING GUIDE
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NO WATER GOING THROUGH THE FILTER:
• If the system has upstream and downstream valves around the filter, check to make sure they are open. Check that field valves are
open.
• At start-up, the backflush valves need a minimum 12 psi to start working. If air is trapped in the system, close the downstream butterfly
valve so that pressure builds up at the filter. Then, slowly open the butterfly valve to allow water to flow to the field.
• Verify that the manual override buttons on all the solenoids are in the correct position. For AC and DC continuous solenoids, the dot in
the round brass knob should be pointing towards the brass base of the solenoid, not towards the black square plastic solenoid coil.
For DC latching solenoids, the green lever should be vertical. See page 6 for illustrations. If all of the manual override buttons are in the
wrong position, water will not flow through the filter.
• Make sure all vent tubes are venting to atmosphere with no back pressure.
NO BACKFLUSH OPERATION:
Check the Upstream and Downstream Pressure
• The pressure downstream of the filter needs to be at least 30 psi during backflushing. The Pressure Sustaining Normally Open (PSNO)
Valve should be set to at least 30 psi during backflushing.
Check the Command Filter
• Make sure the command filter is clean. A clogged command filter does not provide command water to the solenoids and backflush
valves and the filter will not flush. Also, make sure the 2” ball valve in front of the command filter is open.
Check the Pressure Differential (PD) Gauge
• Make sure the PD gauge is not broken. The set point (the short needle) should be set at 5 psi. The long red needle indicates the
pressure differential at any given time. If the needle reads zero, then the discs are clean. As the red needle moves towards the shorter
(set point) needle, then the discs are getting dirty. When the two needles touch, the backflush controller will initiate a flush cycle.
• Test the PD gauge while the water is on - disconnect the hydraulic tube from the low pressure port of the gauge (the off center port).
Water will squirt out of the tube; you can bend the tube to temporarily stop the water. The long red needle should move quickly and
touch the short needle. When both needles touch for 15 consecutive seconds, a backflush cycle will start.
• If the backflush starts, then the PD gauge is working. If there is no flush, replace the PD gauge. Re-connect the hydraulic tube to the
PD gauge.
Check if the Filter Discs are Clogged
• To check if the filter discs are clogged, turn off the water and confirm there is no pressure in the system. Open up a filter cover and
inspect the discs. If all of the filters are completely clogged, the filter will not flush.
• Remove the discs and clean – refer to the Disc Cleaning Instructions on Page 11 and 12.
• Reassemble the discs on the spine and the filter cover, then tighten the clamp.
• Initiate a backflush with the backflush controller. If the filter still doesn’t flush, refer to the Check the Backflush Controller Section
below.
Check the Backflush Controller
• To test the backflush controller, initiate a backflush by pressing the black button (manual override).
• The solenoid should click and send the filter into flush mode. After 20 seconds, the solenoid should click again and end the backflush.
• If the solenoid clicks, then the solenoid is operating and the control panel is not. If the solenoid does not click, then the solenoid needs
to be replaced
• To test the solenoids: remove the wires of the solenoid from the terminal of the control panel and connect them directly to the power
source. For DC models, touch the wires. For AC models, connect the solenoid wires to the outlet transformer wires.
• If the backflush was not initiated, check wires to verify all connections are secure.
• Push the reset button on the front panel and initiate a backflush again.
• Flush a filter individually by turning the manual override of the solenoid 180 degrees. If that filter flushes, then the filter is working
hydraulically and the problem is electric.
TROUBLESHOOTING
NOTE: Refer to Netafim USA’s YouTube Channel
for Apollo Troubleshooting Guide Video