Kidde Fire Systems DS Series, Application Manual

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K-76-1000 -26- July 2016
Heat detectors sense change in air temperature and initiate alarm conditions based on a fixed-
temperature point, rate of temperature rise, or amount of temperature rise above ambient condition.
The DS-HFS heat detector is a spot-type detector. Spot-type heat detectors have a detecting element or
elements that respond to temperature conditions at a single point or in a small area. The fixed temperature
detectors respond when the detecting element becomes heated to a predetermined level.
DS-HFS detectors are best suited for detecting fast, flaming fires such as open wood and liquid fires
without smoke.
Heat detectors do NOT:
•
Operate without electrical power. As fires frequently cause power interruption, discuss further safe-
guards with the local fire protection specialist.
• Sense fires in areas where heat cannot reach the detector. Heat from fires in walls, roofs, or on the
opposite side of closed doors may not reach the detector.
• Provide, by themselves, life safety protection. Use heat detectors with photoelectric smoke detectors.
• Detect oxygen levels, smoke, toxic gases, or flames. Use these devices as part of a broad-based life
safety program which includes a variety of information sources pertaining to heat and smoke levels,
extinguishment systems, visual and audible devices, and other safety measures.
WARNING
According to independent studies, use heat detectors only for property protection. Never rely
on heat detectors as the sole means of fire protection.
Table 3. Suitability of DS-HFS Heat Detector for Various Applications
Type of Fire Suitability of detectors
Open wood Optimal
Wood pyrolysis Unsuitable
Smoldering cotton Unsuitable
PU foam Suitable
N-heptane Very Suitable
Liquid fire without smoke Optimal