Bosch D273 User Manual

D273IS Four‑Wire Smoke Detector with Isolated Heat
Sensor and Sounder
Four‑wire smoke detector with an isolated 135°F
(57°C) heat sensor and a sounder.
Order number 

D273TH Four‑Wire Smoke/Heat Detector
Four‑wire smoke detector with a 135°F (57°C) heat
sensor.
Order number 

D273THC Four‑Wire Smoke/Heat Detector with Auxili-
ary Relay
Four‑wire smoke detector with an isolated 135°F
(57°C) heat sensor and an auxiliary relay.
Order number 

D273THCS Four‑Wire Smoke/Heat Detector with Auxili-
ary Relay and Sounder
Four‑wire smoke detector with a 135°F (57°C) heat
sensor, an auxiliary relay, and a sounder.
Order number 

D273THE Four‑Wire Smoke/Heat Detector with EOL Re-
lay
Four‑wire smoke detector with a 135°F (57°C) heat
detector and an EOL relay.
Order number 

D273THES Four‑Wire Smoke/Heat Detector with EOL
Relay and Sounder
Four‑wire smoke detector with a 135°F (57°C) heat
sensor, a sounder, and an EOL relay.
Order number 

D273THR Four‑Wire Smoke/Heat Detector with Trouble
Relay
Four‑wire smoke detector with a 135°F (57°C) heat
sensor and a trouble relay.
Order number 

D273THS Four‑Wire Smoke/Heat Detector with Sounder
Four‑wire smoke detector with a 135°F (57°C) heat
sensor and a sounder.
Order number 

Accessories
D275 Power Supervision Module
Line supervision device for four-wire fire detection
circuits
Order number 

D1005 Test Cable
Connects a digital voltmeter to the detector's
calibration pin for verifying that the detector is within
its calibration range
Order number 

DT‑2 Detector Removal Tool
Use the DT‑2 to remove, replace, or test the detector
head
Order number 

TP280 Trim Plate
For retrofit and remodeling purposes; 16.2 cm (6 in.)
diameter
Order number 

 

3 | D273 Series Photoelectric Smoke and Smoke and Heat Detectors