Conventional Heat Detector
GENERAL DESCRIPTION
Model WT105 is intelligent sensors that utilize a
state-of-the-art thermistor sensing circuit for fast
response. These sensors are designed to provide open
area protection with 50 foot spacing capability. Model
WT105 is a rate-of-rise temperature sensor with 135°F
fixed temperature alarm.
Model WT105 is a rate-of-rise with fixed temperature
alarm thermal detector utilizing a state-of-the-art dual
thermistor sensing circuit. These detectors are
designed to provide open area protection with 50-foot
spacing capability, and are to be used with compatible
control panels only.
Two LEDs on each detector light to provide 360°
visibility of the detector indication.
SPECIFICATIONS
Height: 2.2˝ (55 mm) installed in Base
Diameter: 4.0˝ (103 mm)
Weight: 5.5 oz. (155 g)
Installation Temperatures: –4°F to 150°F (–20°C to 66°C)
Operating Humidity Range: 10% to 93% Relative Humidity Non-condensing
Operating Voltage Range: 9 to 28VDC Volts Non-polarized
Standby Current: 40μA@ 24 VDC
MaximumAlarm Current (LED on: ) ≤30mA@ 24 VDC
Fixed Temperature Rating: 135°F (57°C)
Rate of Rise Detection: Responds to greater than 15°F/min
INSTALLATION
BEFORE INSTALLING
This detector must be installed in compliance with the
control panel installation manual and meet the
requirements of the authority having jurisdiction. In
addition, the National Fire Protection Association has
published codes, standards, and recommended
practices for the installation and use of detectors,
NFPA 72.
Therefore, the installer must be familiar with these
requirements, with local codes, and any special
requirements of the authority having jurisdiction..
NOTICE: This manual should be left with the
owner/user of this equipment.
IMPORTANT: The detector must be tested and
maintained regularly following NFPA 72 requirements.
The detector should be cleaned at least once a year.
INSTALLATION
NOTE: All wiring must conform to applicable local
codes, ordinances, and regulations.
NOTE: Verify that all detector bases are installed, that
the initiating-device circuits have been tested, and that the
wiring is correct.
Remove power from initiating-device circuits before
installing detectors.
1. Wire the sensor base per the wiring diagram, Figure 1.
2. Install the sensor into the sensor base. Push the sensor
into the base while turning it clockwise to secure it in
place.
3. After all sensors have been installed, apply power to
the control unit.
4. Test the sensor(s) as described in the TESTING section
of this manual.
5. Notify the proper authorities that the system is in
operation.
