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Installation Requirements : Flushsaver Pans

technical specificationsInstallation InstructionsInstallation Requirements


The standard unit for “Pans” comprises one 24 volt AC Adapter (1A), one Touch Plate Controller, one 24 volt 25mm Solenoid Valve, one Air Gap Valve and one 2m length of Figure Eight cable. A set Pressure Reduction Valve may be required if the water pressure is greater than 500 KPA (not supplied).

The Touch Plate incorporates the System Controller and can be placed in any convenient location. There are two adjustment Pots on the Control Module labelled “Long” and “Short” (i.e. Full and Half flush) that allow you to adjust the length of time the Solenoid Valve stays open for. Clockwise rotation of the pots increases flush time. Full Flush is 4 to 10 seconds adjustable while the Half Flush is 1 to 4 seconds adjustable.
The connections to the Touch Plate Controller are as follows:
Power supply to the two “AC 1 & 2” male spade connectors.
Solenoid Valve to “Valve” female spade connectors.

As the input and output point are both A.C. the connectors are not polarity conscious.
Ensure that adequate Silicon is used to ensure water does not run down the back of the stainless steel backing plate when cleaning is being carried out.

A standard mains power point is required for each Control Module. The AC Adapter is connected to the Control Module at the positions marked “AC” on the unit. Do not turn the power on until the installation procedures have been completed.

The wiring used to and from the control unit is standard “figure 8” cable and is widely available from electrical wholesalers and retailers.
Use only insulated cable connectors (these are supplied), any other connectors will void the Warranty.

All wiring should be in conduit.

An Earthing Stud is provided adjacent to the AC IN1 & AC IN2 terminals for grounding the metal parts of the unit.

The Solenoid Valve should be fitted to the flush pipe at a minimum length 1.2metres from the invert level of the “Pan”. The amount of water flowing through the Solenoid Valve can be adjusted at the Control Module by turning the screw thus allowing the Solenoid Valve to remain open for a longer period and at the stopcock. The Airgap Valve is screwed into the Solenoid Valve and then completely into the flush pipe. Ensure that the flush pipe is straight and there is no interference with the water flow after this point no matter how small. Connection onto the Airgap Valve thread should be with a 50mm F.I. coupling (no.2) PVC or Copper F I brazing bush.
Do not use 50mm Cap and Linings.
Solenoid Valves must be fitted with disconnection unions on both sides of the Valve for maintenance purposes.

Torx Slot/Drive heads are used to open the Valves to clean – Available from Blackwoods

A standard backflow prevention device must be installed to prevent the contamination of potable water supply.), a Registered Airgap Valve is supplied for each Solenoid Valve.
An RPZ Valve model 825y (AS 2845 Lic. No 1049) could also be used AS 3500.1.2 1998.

NOTE: Care should be taken when installing the Airgap Valve as follows:

  1. Ensure that the Solenoid Valve and Airgap are Vertically aligned with the flush-pipe
  2. Ensure that the Air Gap is installed such that ALL of the 50mm thread is inside the female adaptor.

It is recommended that you use 50mm flush pipe from the Air Gap for a length of 300mm. Should this not be possible please contact your nearest agent for alternative procedures.

It is recommended that an in-line filter be placed after the stop- cock to prevent water contaminants from entering the solenoid valve and unseating the valves diaphragm.

In installations where there is high water pressure and flow rates the stop- cock may have to be partially closed to prevent water escaping from the Air Gap. This causes water turbulence that often results in a noisy installation. Should this be the case a set pressure reduction valve (350-500KPA) should be placed in the water line – where it is a multi storey facility – one per floor is required.

You will require a minimum of 25mm water line into this area to ensure adequate water flow with a 40mm flush-pipe. Where there are Six or more “Pans” it would be advisable to run a 32mm water line. Minimum water pressure required is 200 KPA (working pressure) with a minimum water flow of 1.3 litres per second.

Ensure that the water line is flushed of any rubbish before the Solenoid Valves are connected to ensure that nothing gets caught in the seat of the Solenoid Valves to stop them closing correctly. Should they fail to close correctly the Valves should be checked and cleaned.

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