4kW passive infrared controller is part of the Infresco family of controllers designed to provide energy saving when used with Quartz Infrared Halogen Lamps. The ‘P’ model has a built in PIR sensor allowing the lamps to automatically switch on only when people are present. In addition to the PIR, a temperature sensor monitors the outside temperature and inhibits the lamps when the temperature exceeds a pre-determined set point of between 1°C and 60°C. This is an excellent way to save energy, particularly in warehouse or industry, as the controllers will only switch on the heaters when for example the ambient temperature is under 16 degrees celsius. As soon as 16 degrees is achieved the heaters switch off.
The microcontroller-based system incorporates zero-voltage switching and a soft-start function to eliminate the lamps’ initial high inrush current – potentially increasing lamp life by as much as 30%. The lamps are switched on for a fixed time period of 5 minutes. This period is reset each time the PIR detects any further movement. Installation of the unit is simple and once installed is relatively maintenance-free.
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