Standard for Heat Actuated Fire Detectors for Fire Alarm Systems
Scope:
These requirements cover heat-actuated fire detectors intended for nonhazardous indoor, unconditioned areas, and outdoor locations, for use as components in automatic fire protective systems, to be installed in accordance installation in accordance with:
a) In Canada:
1) The National Building Code of Canada;
2) The National Fire Alarm Code of Canada;
3) The Standard for the Installation of Fire Alarm Systems, ULC-S524;
4) The Canadian Electrical Code, CSA C22.1;
b) In the United States:
1) The National Fire Alarm and Signaling Code, NFPA 72;
2) The National Electrical Code, NFPA 70.
These requirements cover:
a) Fixed-temperature detectors;
b) Rate-of-rise detectors;
c) Combination of fixed-temperature detectors and rate-of-rise detectors;
d) Heat Sensitive Cable; and
e) Heat Sensitive Tube.
Project need:
Clause 57.4.2 wrongly states that five transmitter-receiver units are used, when six frequencies are specified.
Clause 38.3 states the following:
“If equipment is intended specifically for use in a prevailing ambient temperature constantly more than 25°C (77°F), the test of the equipment is to be made at the higher temperature, and the maximum temperature rises specified in Table 38.1 are to be reduced by the amount of the difference between that higher ambient temperature and 25°C.”
When applying this requirement for products intended to be installed in a prevailing temperature that exceeds 49C, the component temperature must operate at a temperature less than the prevailing ambient temperature which is not plausible. Therefore, the proposed revisions provide an alternate metric that can be applied to referenced components that do not comply with the requirements outlined 38.3.
These revisions align this test with Section 68 - Component Temperature Test requirements as specified in ANSI/UL 864, Control Units and Accessories for Fire Alarm Systems, 10th Edition.
These proposed revisions to include battery requirements for battery operated heat detectors align with current practice and existing UL 268, 7th Edition requirements.
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.