AMOS 550 NATURAL GAS DETECTOR Page 3
5.0 Installation
5.1 The detector is supplied complete with a surface mount electrical box to house the
connector block and fitted with a bracket to secure the detector.
Please refer to the connection drawing.
5.2 240V ac mains operated detectors are connected to a terminal block numbers 1 and 2
via an un-switched 3A fused outlet to BS5733. Connect the brown lead to the live ( L )
to No.1 terminal and the blue lead to the neutral ( N ) to No.2 terminal. No earth connection
is required.
5.3 Low voltage operated detector power supplies ( 12V dc or 24V dc ) should be connected to
The terminal blocks as follows: red lead to + L to No 1 terminal and black lead to –N to No
2 terminal.
5.4 The detector is fitted onto the mounting box by placing the lugs on the bracket into the
holes in the back of the case and sliding downwards to locate. Take care to ensure the
cables are placed within the mounting box.
5.5 Remote sensor is soldered to the printed circuit board with a terminal block and fitted
onto the inner surface of the cover plate secured by two fixing screws. The sensor box
must be fitted in a vertical position. Connect detector cable to sensor terminals and secure
lid with the screws provided.
5.6 The distance between the detector and the sensor should not exceed 50 metres.
Note : Cable core sizes from the detector to sensor should be not less than 1.0 (mm ). It is of
Importance to ensure the colour codes at the detector correspond to the number on the sensor
Terminal block ie. Match Red to 1, Black to 2 and Blue to 3. The detector will not operate with the incorrect wiring.
6.0 Remote Sensor ( If applicable )
6.1 Remote sensor is provided with a patresse mounting box. Choose the optimum location
for the sensor, fix the box to the wall, connect the wiring cable to the terminals as shown
on the wiring connection drawing.
6.2 The maximum cable run from the sensor to the detector should not exceed 50 metres using
1.0 mm sq three core cable. Ensure the colour codes at the detector terminal block sensor
match. ( Refer above ) Failure to comply with these instructions will cause the sensor to be
inoperative.
7.0 Relay Outputs: Detector in quiescent mode.
Relay RL / 1 ( Yellow Cables ) these contacts are volt free , will close in alarm conditions.
Relay RL / 2 ( Violet Cables ) these contacts are volt free , will open in alarm conditions.
