Fire Alarms

Fire & Safety Ltd |  Fire Alarms

Homesafe install Fire Alarms to NZS 4512:2003

We are pleased to be able to provide a quotation for any size system


What are the different types of Fire Alarm?
2 Single or Multizone. Manual system Automatic signalling
3   Manual & Heat Automatic signalling
3b (b means firecells have a single escape route. Type 4 or 6 is required)
4   Manual & Smoke Automatic signalling
4e (e allows optional use of Type 5)
5 Local Alarm Smoke Detection No Signalling
  (Heat detection in fire cells to alert all occupants)
6 Sprinkler plus Type 2 Fire Alarm Automatic signalling
7 Sprinkler plus Type 4 Fire Alarm Automatic signalling
7e Sprinkler plus Type 5 Fire Alarm No Signalling
f Suffix f means No Signalling as long as a telephone is available to dial 111
What Legislation may I need to consider may be involved?
  • Building Act
  • NZ Building Code
  • Electricity Regulations
  • Radio communications Regulations
  • Fire Service Act
  • Fire Safety and Evacuation of Building Regs.
Buildings need to be split into zones. An indication of the zone activation needs to be indicated on the panel. All alerting devices on a zone shall operate together except as permitted in a Type 5 system.
Ancillary Services
On activation of the Control Panel it may initiate (Not Power) through relays.
  • Ventilation systems
  • Emergency lighting
  • Lift controls

Sprinkler pressure and flow switches must not generate a Fire Alarm (signal only)
Fire Alarm
Operation of 1 or more detectors or call points shall result in a Fire Alarm by;
  • Alerting devices in building
  • Indication on the panel and any indicating unit and repeater.
  • Signal (When required to be connected)
  • a,b and c above are optional where detectors are fitted for local alarm
  • Audible alarms are to operate till manually reset.
  • Alarms using voice systems are to override any other function when in alarm.
  • Conventional smoke detectors need to operate twice before an alarm signal is sent
    (analogue algorithms override this issue).
  • Ancillary alarms that are indicative of a fire such as a sprinkler head are permitted to activate the alarm.
  • Signalling shall latch
  • Alarm shall continue until system restored or silence switch operated.
  • Outside switch key operated and marked "Silence Alarms. Brigade Use Only". Operated detectors are isolated only.
  • Ancillary equipment such as a sprinkler control must have the same switch fitted./li>
Manual Reset Facilities
Only possible when activated devices have been reset or cleared. This may require replacement parts or other devices such as switches within the panel.
Evacuation & Alert Switches
A key operated switch Market "Evacuation" on the panel is to be used to isolate the signalling and to allow testing and trial evacuations.

A key marked "Alert" is used for testing staged evacuation.
Defect Warning
When the following occurs;
  • When battery level is below the manufacturers capacity.
  • Open or Short circuit on a zone or low/high impedance that prevents the detection from operating the zone.
  • Suitable LED's, LCD or other system.
  • If incandescent lamps are used 2 are required in case of failure.

Fire & Safety Ltd |  Fire Alarms