Washroom Control

How the Washroom Control System operates

The Cistermiser Washroom Control has been designed as a simple yet effective management system for controlling all primary services within the washroom. Occupancy is constantly monitored by up to 10 PIR sensor strategically placed throughout the washroom. This ensures that the washroom services are activated while facilities are required and remain inactive while they are not.

When someone enters the washroom all services controlled by the Washroom Control unit are activated; the hot and cold water solenoids open, lighting is switched on (if necessary), the extract-fans start turning and the internal timers begin counting. Every service system in the washroom is set to run for a fixed time or 'service cycle' which is activated by the timer being set to zero. As long as the washroom is occupied the PIR sensor signals will continue to be interupted which re-sets all timers to zero and maintains the system in operating mode.

When the washroom becomes unoccupied the PIR sensor signals are no longer interrupted the timers are not re-started, the Washroom Control sends no further output signals so the washroom services complete their service cycles and shut down (see table below).

If no movement is detected for 24 hours the cold water solenoid automatically opens for 30 minutes to activate a 'hygiene' flush through the urinals which prevents washroom odours.

Application and Installation

The Washroom Control provides the benefits of a Building Management System (BMS) within the discrete environment of the washroom. Each Washroom Control system requires a master control unit connected to a 240v mains supply, a number of PIR sensor units (generally at least 3 or 4) which are either surface or flush mounted on the wall or ceiling and solenoid valves of the appropriate size plumbed into the hot and cold water supply. The unit controls services within a defined area, which can be a single toilet facility or several adjacent facilities. Ease of installation makes the Washroom Control suitable for existing premises as well as new buildings. All systems contain a urinal flush control unit to comply with the Water Regulations.

The system includes a 'key switch' to provide manual over-ride during maintenance work.

Benefits

The Cistermiser Washroom Control system ensures that the full range of washroom utility services is available on demand but shut down when the washroom is not in use. This automatic shut-down process eliminates the costs of unnecessary lighting and hot and cold water loss caused by open taps and leaking valves. It also significantly reduces the risk of flood damage and vandalism and the high costs asssociated with them.

PIR Sensors - detecting occupancy and monitoring light levels

The PIR (person in room) sensors units are normally positioned in the ceiling. They have two functions; to transmit a regular signal to the Washroom Control unit and to compare ambient light level with an adjustable threshold. Detection of body movement interrupts the PIR sensor signals, indicating that the washroom is occupied and activating the washroom services as previously described.

The light level monitoring function ensures that electric lighting is only used when natural light levels are insufficient.

Technical specifications

Contolled Outputs

Notes:

1. Timer accuracy +/- 5%.
2. If the controlled output load to any service exceeds the maximum stated the Washroom Control should be connected to a suitable contactor which will regulate the power supply to the unit.

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