Standard for Single and Multiple Station Heat Alarms

Designation Number:
CAN/ULC S589 / ANSI/UL 539
Standard Type:
National Standard of Canada - Domestic
Standard Sub-Type
Joint Canada-U.S. National Standard
Standard Development Activity:
Amendment Revision
ICS code(s):
13.220.20
13.320
Status:
Proceeding to development
SDO Comment Period Start Date:
SDO Comment Period End Date:
Posted On:

Scope:

Scope

1.1  These requirements cover heat-actuated, single and multiple station heat alarms intended for indoor installation in accordance with:

a) In Canada:

1) The National Building Code of Canada,

2) The National Fire Code of Canada,

b) In the United States:

3) The National Fire Alarm and Signaling Code, NFPA 72

Project need:

As written, Table 7.1 can be construed to only allow heat alarms in the entire range of 135 to 174 degrees Fahrenheit to be installed at a maximum of 115 regardless of where its operating temperature falls in that range. This change aligns ULC S589/UL539 with NFPA 72 17.6.2.3.2 which simply requires that the device have a 20 guard band between the maximum installed temperature and the set point.


NFPA 72 2022 - 7.6.2.3.2 The temperature rating of the detector shall be at least 20°F (11 °C) above the maximum expected temperature at the ceiling.

Note: The information provided above was obtained by the Standards Council of Canada (SCC) and is provided as part of a centralized, transparent notification system for new standards development. The system allows SCC-accredited Standards Development Organizations (SDOs), and members of the public, to be informed of new work in Canadian standards development, and allows SCC-accredited SDOs to identify and resolve potential duplication of standards and effort.

Individual SDOs are responsible for the content and accuracy of the information presented here. The text is presented in the language in which it was provided to SCC.