Fire Safety, Smart Home

Specification Hardware Install – Smoke and Heat Alarm

The alarm base plate is designed to be permanently mounted, using its own built-in terminal block to connect it to the mains.The base plate can be screwed directly to the ceiling.

IMPORTANT: The circuit used to power the alarm must be a 24 hour voltage circuit that cannot be turned off by a switch.BS 5839-6 states that: For mains powered alarms, each with an integral standby supply (Grade D)1, the mains electricity supply should take the form of either a) an independent circuit at the dwelling’s main circuit board, in which case no other electrical equipment should be connected to this circuit (other than a dedicated monitoring device installed to indicate failure of the mains electricity supply to the alarms); or b) a separately electrically protected, regularly used local lighting circuit.

  • Ensure a permanent connection to the fixed wiring of the building is made in a suitable junction box.
  • Remove the terminal block cover.
  • If trunking is required, snap the break-out tab away from the base plate prior to connection.
  • The wiring must be connected to the terminal block as follows:
  • Live (L) – Connect to the Live in the house wiring.
  • Neutral (N) – Connect to the Neutral in the house wiring.
  • Interconnect (I) – If desired, join the Interconnect wire between the alarms.

Use the terminal to safely terminate any copper Earth or green / yellow cable.

WARNING: Mixing the Live and Neutral connections when interconnecting alarms will damage all the alarms. DO NOT use the Earth wire for the interconnect connection.

Either feed the wire through the hole in the base plate or through the YT2 trunking.

Line up the alarm with the base plate and gently apply pressure until the alarm clicks into place. Switch on the mains electricity supply.

Check that the green LED is on and that the red LED is flashing once approximately every 45 seconds. The LEDs are located on the front of the alarm.

Test the alarm.

Multiple Alarm Installations:

For multiple alarm installations use a ‘three core and earth’ style cable between all the alarms to be interconnected. Connect the interconnect cable between each alarms ‘I’ terminal. The interconnect wire (minimum 0.75 mm2 cable) must be treated as Live, it should be insulated and sheathed.


  • Exceed the maximum of 30 interconnected alarms on a network.
  • Exceed 250 m of connecting wire per circuit.
  • Connect FireAngel Specification alarms to any other models produced by another manufacturer.