Power Requirements Changes or modifications not expressly approved by Two-wire: 8.5 VDC to 33 VDC Standby Bosch can void the user’s authority to operate the D285 Voltage: Four-wire: 10 VDC to 30 VDC Series Smoke Detectors. Maximum 25% of DC input RMS Ripple: 1.0 Overview...
D285/D285TH | Installation Instructions | 2.0 Mounting 2.0 Mounting 3.0 Installation Testing 1. Before mounting, remove the dust cover from the 1. Check the wiring from the control panel to the last detector. The dust cover can be replaced during head on each run for proper polarity and continuity.
D285/D285TH | Installation Instructions | Maintenance 3. Gently pry the cover tab away from the chamber 4.0 Maintenance cover and pull the chamber cover up and away from the chamber (refer to Item 2 in Figure 3). Notify all concerned parties before and after Figure 3: Removing the Detector’s Chamber Cover...
LED latches on. If the unit • If the detector is within the factory marked does not go into alarm, return it to Bosch for repair. calibration range, it goes into alarm and the alarm LED latches ON.