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.
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.