ULC-S548-02

1. Scope 1.1 This Standard contains requirements for alarm Initiating and Supervisory Detection Devices for attachment to water type extinguishing systems (such as wet, dry and deluge type sprinklers, residential sprinklers, water mist suppression systems, and standpipe systems), as follows: A Alarm Initiating Devices, including but not limited to: (i) Vane and paddle type waterflow switches; and (ii) Pressure actuated waterflow switches; B Supervisory Indicating Devices, including but not limited to: (i) Pressure supervisory switches; (ii) Shut-off valve position supervisory switches; and (iii) Water level supervisory switches; and (iv) Temperature Supervisory Switches 1.2 Valve position supervisory devices may be of a design suitable for the supervision of gate, butterfly or post-indicator type valves. 1.3 The requirements of this Standard cover devices suitable for installation in ordinary (non-hazardous) indoor and outdoor locations. 1.4 The units covered by this Standard are intended for installation in accordance with the following: A CAN/ULC-S524, Standard for the Installation of Fire Alarm Systems; B CSA C22.1, Canadian Electrical Code, Part 1, Safety Standards for Electrical Installations; C NFPA 13, Standard for the Installation of Sprinkler Systems; and D NFPA 72, National Fire Alarm Code