3 4098 Smoke Detectors, Heat Detectors and Bases
This chapter contains specification and mounting information for 4098 Smoke Detectors, 4098 Heat Detectors, and 4098 Bases.
3.1 4098 Smoke Detectors
CAUTION: Install the detectors described in this publication in accordance with applicable NFPA standards, local codes, and the
Authorities Having Jurisdiction (AHJs). Failure to follow these instructions may result in failure of the detector to initiate an alarm condition.
The manufacturer is not responsible for detectors that have been improperly installed, tested, or maintained.
3.1.1 Smoke detector limitations
The smoke detectors used with these bases are designed to activate and initiate emergency action, but do so only when used in
conjunction with other equipment. They are designed for installation in accordance with NFPA 72 National Fire Alarm and Signaling Code.
• Smoke detectors do not work without power. AC or DC powered smoke detectors do not work if the power supply is cut off for any
reason.
• Smoke detectors do not sense fires when smoke does not reach the detectors. Smoke from fires in chimneys, in walls, on roofs or on
the other side of closed doors may not reach the smoke detector and alarm it.
• A detector may not detect a fire developing on another level of a building. For this reason, locate detectors on every level of a building.
• Smoke detectors have sensing limitations. In general, detectors do not provide warning for fires resulting from inadequate fire
protection practices, violent explosions, escaping gases, incorrect storage of flammable liquids such as cleaning solvents, other safety
hazards, or arson.
• Smoke detectors do not last forever. Smoke detectors contain electronic parts. Even though detectors are made to last for many
years, any of these parts can fail at any time. Therefore, test smoke detector systems according to NFPA 72 at least annually. Clean
and maintain smoke detectors regularly. See the Compatibility and testing section of this publication for the cleaning instructions.
3.1.2 Specifications
Table 2: Smoke Detector Specifications
Specifications Smoke Detector Data
Detector PID (4098) 4098-9601, 4098-9605 4098-9602
Type of detector Photoelectric Photoelectric with Heat
Working voltage (2-wire) 8.5 – 33 VDC 8.5 – 33 VDC
Rated voltage (4-wire) 15 – 32 VDC 15 – 32 VDC
Input ripple voltage 25% Max. 25% Max.
Max. alarm current 86 mA 86 mA
Surge current <200 µA <200 µA
Standby current <100 µA <100 µA
Heat element rating N/A 135ºF
Humidity range (non-condensing) 10-95% RH 10-95% RH
Air velocity range 0-2000 FPM 0-2000 FPM
3.1.3 Mounting requirements
All smoke detectors identified in Table 2 mount to a detector base, refer to 4098 Bases for more information. Use the following
considerations when mounting smoke detectors.
Important: Smoke must enter the chamber of the detector. Air flow, air stratification, air velocity, air stagnation, and air migration affects
detector efficiency.
Note: Where the possibility of positive airflow from the electrical conduit or junction box exists, use 3M Weatherban number 606, or an
equivalent, non-flammable sealing compound to seal the conduit openings.
• Do not install detectors in areas where temperatures are likely to exceed 100°F or 38°C or fall below 32°F, or 0°C.
• Because the 4098-9602 detector combines heat sensing, DO NOT install this detector in locations where the ambient temperatures
exceed 100°F, or 38°C or where temperature fluctuations above 6°F per minute occur.
• Do not install detectors on a ceiling within 4 inches, or 10 centimeters of a wall.
• Do not install detectors where forced air ventilation can dilute the smoke before it reaches the detector.
• Do not install detectors in areas where smoke is normally present, such as kitchens, furnace rooms, laundry rooms, loading docks,
rooms with fireplaces, rooms with candles, soldering rooms, and so on.
page 10 574-709 Rev. AP
4098 Detectors, Sensors, and Bases Application Manual
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