ULC ULC-S545-02 Residential Fire Warning System Control Units

These requirements cover residential fire warning system control units and accessories intended to be installed in accordance with the Standard for the Installation of Residential Fire Warning Systems, CAN/ULC-S540.

A residential fire warning system control unit consists of a unit assembly of electrical parts having provision for connection of power source and initiating device circuits.

Provision for the connection to the control unit of at least one smoke detector is required unless reference is made on the installation diagram for the use of a self-contained smoke detector such as a single or multiple-station smoke alarm.

These requirements also apply to the use of combination systems, such as a combination fire-burglar alarm system control unit, which employs circuit wiring common to both systems.

These requirements do not cover single or multiple-station smoke alarms, automatic fire detectors, or alarm indicating appliances such as bells, horns, and the like. They do cover accessories, which are external to the control unit and are dependant upon the control unit to function, such as end-of-line devices, annunciators, and remote switches.