2-4
All smoke detectors identified in Table 2-1 mount to a detector base (refer to the “4098 Bases”
section of this chapter for more information). Use the following considerations and Figure 2-1
when mounting smoke detectors.
IMPORTANT: Smoke must enter the chamber of the detector. Thus, 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/junction box exists,
seal the conduit openings with 3M Weatherban #606 (or equivalent), a non-flammable
sealing compound.
Do not install detectors in areas where temperatures are likely to exceed 100 F (38 C)
or fall below 32 F (0 C).
Because the 4098-9602 detector combines heat sensing, DO NOT install this detector in
locations where the ambient temperatures exceed 100 F (38 C) or where temperature
fluctuations above 6 F/min. occur.
Do not install detectors on a ceiling within 4 inches (10 cm) of a wall.
Do not install detectors where forced air ventilation may dilute the smoke before it
reaches the detector.
Do not install detectors in areas where smoke is normally present (kitchens, furnace
rooms, laundry rooms, loading docks, rooms with fireplaces, rooms with candles,
soldering rooms, etc.).
Do not install detectors in areas where there is likely to be steam (in hospital patient
rooms with vaporizers, near shower rooms, above large sinks, etc.).
Do not install detectors above ashtrays in elevator lobbies.
Wall-mounted detectors should be located 4 to 12 inches (10-30.5 cm) from the ceiling to
detector head.
Protect all detector heads during construction to avoid infiltration of construction debris.
Remove any protective covers before activating the system.
If using the adapter plate, tighten the mounting screws without warping the adapter plate.
4098 Smoke Detectors,
Continued
Mounting
Requirements
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