» Multi Zone Flood Prevention System - CWD4:

The well established Aqualeak single and multizone CWD range of Water Leak Detection Systems provides security against ingress of water into areas housing high technology equipment, archive records, irreplaceable art/historical treasures, computer rooms, plant rooms, hospital areas, telephone exchanges, etc.

Although the CWD in standard form can provide water shutdown via the designated ‘shutdown relay’, this requires the valve/s to be mains powered and controlled from outside. For this reason Aqualeak can provide the CWD range in the ‘VS’ variant which includes powering and controlling of the valves directly from the CWD cabinet. The valves and the water detection system are therefore supplied as a matched composite system. Monitoring would generally be by linear sensor cable fitted in the false floor void.

A typical application for the multizone CWD 4 Unit could be a computer room with four air conditioning units. The requirement could be to monitor the four A/C units for leaks and, if a leak is detected, to provide immediate shutdown of the water supply only  to the leaking A/C unit. Monitoring would be specific to four zones and control would be specific to four valves. 

The CWD control system would be provided with a valve power supply unit providing 24VAC to the solenoid valves in the incoming water supply pipes to each air conditioning unit. Each zone reports individually back to the controller and each zone controls the valve entirely independently. When a leak is detected, the valve shuts immediately, and stays shut, automatically resetting when the flood is cleared.

As the clearing of any water leak could take some time, the valve supply system would be provided with an individual valve key switch override system to allow manual reset of each valve separately. Should the leak not be a problem and if the situation is under control, turning the key to the ‘Override’ position would allow the water to be turned on again even if the water detection system is still in ‘alarm’ and ‘holding’ the valve closed. 

In view of Aqualeak's extensive experience in this field, all our Water Detection Systems can be tailored to provide monitoring of any number of zones and controlling multiple valves as required by any specific project design.