The original was fitted about 30 years ago and operated by an manual key. The replacement was fitted using the same sensors and in the sames position. Once the installation was complete the customer decided to upgrade the systems coverage and an additional PIR was added in the Lounge.
The final solution was a much simpler system with increased coverage. The main controller and new bell boxes were fitted in a few hours, only returning to add a new PIR once the customer had decided that the upgrade would be very beneficial. This was added and the alarm reprogrammed within an hour.