Gamewell-FCI ATD-L3R-IV — Velociti Series 3 intelligent addressable thermal detector combining 135°F fixed-temperature and rate-of-rise sensing, in ivory.
A single thermistor reports the measured temperature to the panel continuously, so the panel holds live thermal data at a point address rather than a contact closure from a zone. The rate-of-rise element catches a fast fire before the fixed threshold is reached. The -IV suffix is the legacy service finish, operating in both Velociti and CLIP protocol.
- 135°F (57°C) fixed plus rate of rise above 15°F per minute
- Rotary address switches, 01 to 159
- 15 to 32 VDC from the SLC; 200 µA standby, 2 mA alarm at 24 VDC
- Operating range -4°F to 100°F
- Dual LEDs for 360° visibility; test switch operated by a magnet
- 2.0" high, 6.1" across in a B300-6 base or 4" in a B501 base
- UL S2332, FM 3023594, MEA-FDNY 219-02-E, CSFM 7270-1703-0502
ATD-L3-IV is fixed temperature only and ATD-L3H-IV is a 190°F high-temperature model, so the R is all that separates this part from a plain fixed head; ATD-L3R without the suffix is the bright white, Velociti-only version.
Documents
FAQ
Which protocol does the ATD-L3R-IV use?
The ivory -IV service models operate in both Velociti and CLIP protocol for backward compatibility; the bright white ATD-L3R is Velociti only.
Is a base included?
No. Bases are ordered separately, such as the B501-IV 4 in. or B300-6-IV 6 in. base, or the ivory sounder, relay and isolator bases.
At what temperature does it alarm?
At 135°F fixed, or when the temperature rises faster than 15°F per minute.
How is it tested?
It has a built-in functional test switch activated by an external magnet.
