Thermotech 302-AW-194 is an all-weather rate compensation heat detector rated 194°F, for vertical mounting. It is hermetically sealed for moisture-proof or dust-proof installations, needs no special back box, and is suitable for indoor and outdoor use.
The normally open detector uses a high-expansion aluminum shell around two struts with silver contacts. In a slow temperature rise the whole device heats to 194°F before the contacts close; in a fast rise the shell lengthens first and closes the contacts sooner, compensating for thermal lag. It resets itself when the temperature drops.
Specifications
| Alarm temperature |
194°F, rate compensation |
| Max ceiling temperature |
150°F |
| Contacts |
Normally open, self-restoring |
| Electrical rating |
5 A at 6–125 VAC; 1 A at 6–25 VDC; 0.5 A at 125 VDC |
| Spacing |
UL 50 × 50 ft (2500 sq ft) smooth ceiling, 8–10 ft |
| Use |
Indoor and outdoor |
| Potter part number |
1430480 |
Installation notes
- Protect from direct sunlight and adverse weather
- Do not install the detector, hub covers or outlet boxes in direct sunlight
- Follow NFPA 72 for spacing
- The AP-P white adapter plate mounts 302 and 302-AW detectors to a 3 in. or 4 in. octagon outlet box
Related models
302-AW-135 is the 135°F version; 302-ET models add a hex conduit bushing and 302-EPM models are explosion-proof.
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