System Sensor 4WTR-B Photo Smoke Detector

The System Sensor 4WTR-B is a 4-wire, photoelectric i3 smoke detector with a thermal sensor and Form C relay. Throughout the i3 series, installation is simple with its installer-friendly base and plug-in design. The base accommodates a broad range of back box and direct mounting options and provides ample space for pre-wiring the device. To complete the installation, the i3 detector plugs into its base with a simple Stop-Drop ’N Lock action.

To reduce the likelihood of nuisance alarms, all i3 detectors are equipped with both drift compensation and smoothing algorithms. These capabilities minimize both short- and long-term causes of nuisance alarms, such as RF interference and
dust accumulation.

The System Sensor 4WTR-B has red and green LEDs to simplify local status indication during power-up, standby, alarm, maintenance, and freeze trouble conditions. When in alarm, i3 sounder models generate an 85 dB temporal tone. If connected to the RRS-MOD reversing relay/synchronization module, all i3 sounders on the loop will activate when one detector is in alarm. The RRS-MOD also synchronizes i3 sounder output to ensure a clear audible signal.

Features / Specifications

• Drift compensation and smoothing algorithms
• Furthermore, simplified sensitivity measurement
• Also, wide-angle, dual-color LED indication
• Loop testing via the EZ Walk feature
• Built-in remote maintenance signaling