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AV Range FAQs

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AV Basins/ Showers/ Urinals Only

No water
Water supply Ensure water supply is reaching the valve and the water pressure is between 0.5 - 6 bar.
No power Ensure power supply is connected. Check that the system has not gone into 'lock out'.
Blockage Ensure the filters on the inlet and outlet side of the valve are clear.
Wiring The valve is in the closed position. There should be no more than 20m run of wire from the piezo switch to the control box and 20m from the control box to the valve: any more than this and the electrical pulse will not be powerful enough to open the valve.
Solenoid If you have checked the above and are still experiencing the problem there may be a problem with your solenoid. Contact Cistermiser.
Water flow from the outlet is poor
Filter is partially blocked with scale or debris. Remove, clean and re-install. Ensure water supply/pressure reaching the valve is good: if not check upstream filters. For shower and basin outlets check the TMV.
TMV / Water pressure issue. Ensure that the TMV is operating correctly and any water pressure differences are suitable for the TMV Installed.
Continuous flow of water from the outlet or dripping
No power The power has failed whilst the valve is in the open position. Restore power.
Valve orientation Ensure the arrow on the valve is pointing in the direction of water flow.
Water supply Ensure water pressure is not above maximum working pressure of 6 bar.
Wiring The valve is in the open position; see above 'no water', 'wiring'.
Debris or scale in diaphragm Isolate water supply to the valve and remove wires attached to the solenoid. Undo the 4x screws and remove. This will give you access to the diaphragm, (note orientation of diaphragm when reinstalling), flush under cold water and visually inspect. Re-install.
Diaphragm has been damaged by debris Carry out procedure for. "Debris or scale in diaphragm”, visually inspect then call Cistermiser for further instructions.
Solenoid If after checking the above your problem persists. There may be an issue with the solenoid. Contact Cistermiser.
Working fine but sometimes intermittently
Anti-flood lock out switch When selected, the anti-flood lockout function prevents excessive use of water in a zone. If an outlet is activated more than four times successively the zone will shut down for a 30 minute period. Any delay between activations will postpone lockout or prevent it altogether. If a zone enters lockout, an alarm signal is sent via the communications channel. The zone may be reset manually by staff closing and opening the disable switch for that zone. Typically used in secure environments and not in public or communal facilities.

AV Basin / Showers / Urinals / WCs

Run on time too long/ short
Outlet programme Outlet flow programmes can be programmed. Inside the control box is a bank of switches. You can either programme all (PROG ALL) or programme individual (PROG IND). Select the programme you desire to the 'on' position, then press the piezo switch of the outlet / outlets you require to programme, time as required, then press the piezo switch, slide prog dip switch back to original position, they are now programmed.
Typical Durations are:
Shower 30-120 seconds
Basin: 30-60 seconds
Urinal: 5 seconds
WC: 2-3 seconds (if dual flush)
         7-10 seconds (if dual flush not used)

AV Basins / Shower Outlets Only

Water runs cold for some time or stays cold when first activated
TMV/ hot water plumbing issue Ensure TMV is set up correctly; check to see how long the hot water pipe run is prior to the TMV: these can be quite lengthy causing hot water to take some time to reach the TMV and the outlet.
Change run on times or amend plumbing.
Water flows okay and then diminishes immediately
TMV / water pressure issue Ensure that the TMV is operating correctly and any water pressure differences are suitable for the TMV Installed.

AV WC Valve Only

No water is entering the cistern
Water supply / blockage Ensure the water supply is reaching the valve and there are no blockages at the valve inlet or downstream. Working pressure is 0.5 - 6 bar.
Continuous flow into the pan from the cistern
Debris or scale around the seal of the flush valve Ensure that there is no debris or scale around the seal of the flush valve.
Water overflowing through the overflow Ensure that the water entering the cistern is being shut off, adjust the float accordingly.
Shuddering noise / fluctuating between open and closed
Air in system Flush the valve repeatedly to purge the system.

AV Urinal Valve Only

Water is flowing from the dc pipe interrupter
DC interrupter Water is flowing out of the DC pipe interrupter (i.e. backflow condition) or, there is a blockage / restriction downstream. Ensure the recommended height from the sparge outlet to the bottom of the DC pipe interrupter. Typically more than 500mm but no less than 150mm.
Splashing
Urinal bowls Some urinals are not designed for the high pressures of some mains supplies and splashing may occur. In such cases a pressure reducing valve on the supply side of the valve is required to reduce the pressure as necessary (not supplied).