Vesda Air Sampling Panel Maintenance

Filter Replacement in VESDA Detectors

There are many reasons for a customer to decline maintenance. Maybe they can't afford to do the work right now. Maybe they don't even realize they are in need of regular maintenance…or maybe they don't understand why doing maintenance now can save money later by avoiding detector faults. In order for performance-based system design objectives to be met throughout the planned "lifetime" of that design, the system must be maintained to deliver consistent performance.

The detector and its filter are main elements of the system that require routine maintenance. VESDA detectors have a design-life in excess of ten years within standard applications. Once the detector has reached its expectancy of 10 years, the detector should be replaced to continue delivering uncompromised detection.

The replaceable VESDA filter is vital to the detector monitoring accurately and has two functions:

1.Prevent false alarms contributed by dust particles entering the detector

2.Prevent any soiling of the detector optics

The filter loads up with dust particles at a rate that depends upon the environment, generally requiring replacement or cleaning of the filter about every one to two years. The filter cartridge remains the only maintenance item within the ten year cycle.

As the filter approaches its service lifetime, a preventative maintenance indication is provided via the clear fault on the detector. The attached flyer and referenced web link provides a simple table to help you identify the life expectancy of your customers' filters.

It's more economical to do regular maintenance and you don't want to be inconvenienced with a detector fault, or worse a fire that the detector can't detect.