Cistern Flushing Valve - PIR Control for Urinal Flushing Systems
Part Number: CFVWW
Product Overview
The New Water Regulations require a device to regulate the filling of an automatic flushing cistern. This saves water with potentially large financial savings. Control is best achieved with an infrared sensor, which senses a person entering the area and initiates a time delay. At the end of the delay, the cistern starts filling.
The Water Watch CFVWW consists of a latching solenoid valve and a sensor/control module. It is preferable to have one unit per cistern, although the cistern can flush several bowls. An AFL servicing valve fitted with 0.07 Lt/s strainer cartridge is recommended – see AFL data sheet. The latching solenoid (pulse on, pulse off) minimises the
energy requirement enabling the large battery (supplied) to last about 5 years – the LED light provides a visual warning of a failing battery. Alternatively the unit can be mains powered – settings are retained during power failure.
Installing and calibrating the unit is simple - requiring the setup switch to be operated for the filling period. There are no other controls or nozzles to fit. The cistern will flush 30 minutes (factory setting) after the first movement is detected. Flushing can be set to 1, 2, 3 or 4 times per hour.
A ”hygiene flush” occurs once every 24 hours (factory setting) even when no movement is detected. This reduces odour and replenishes water in the waste trap.
Option:
• Auditor tool for urinal flush cistern (CFVAUD). Downloads data from Cistern Flushing Valve including serial number, total flushes, hygiene flushes, fill time, flush setting, hygiene setting and water consumption savings
Specification Clause
Every automatic flushing cistern shall be fitted with a cistern flushing valve kit - model CFVWW – as manufactured and distributed by Arrow Valves Ltd – Tel 01442 823123 www.arrowvalves.co.uk. The controller shall be adjustable to perform a hygiene flush every 12 or 24 hours. The flushing shall be adjustable between 1,2,3 or 4 times per hour. The controller shall be battery1 operated. An automatic flow limiting valve fitted with a 0.07 Lt/s cartridge incorporating a 260 micron strainer shall be installed upstream of the solenoid valve.
Amend as required:
[1] mains
Application
Regulating filling of urinal flush cistern.
Additional Resources
Tutorial:
• Washroom