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Mains Radio-Interlink Ionisation Smoke Alarm with Lithium Back-up - BRK 770RF

Discontinued Product

This product has been discontinued and is no longer available to buy.

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Product Overview

Quick to detect fast flaming fires, the BRK 770RF is a mains powered ionisation smoke alarm with a radio-frequency base plate, designed to achieve wireless interlink with multiple units. Fitted with a sealed lithium back-up battery to power the alarm after a mains failure, the BRK 770RF is ideal for applications where changing batteries and interlink cables would be inconvenient.

  • 230V mains powered with sealed lithium back-up battery (included)
  • Kitemarked to BS EN 14604
  • Suitable for installations complying with BS 5839-6: 2019 Grade D1
  • Consists of a BRK 770MRL ionisation smoke alarm and a radio-frequency base plate
  • Wireless interlinking - requires no cables between units
  • Up to 50 RF smoke and heat alarms can be interlinked within a single system
  • Suitable for upstairs landing areas
  • Quick to detect fast flaming fires
  • Test and hush button feature
  • Radio-frequency range: 150m in free space, 30m in buildings
  • 5 year manufacturer's warranty
Technical Data
Product Code BK770RF
Alternative Product Codes BK770RF, 770RF, 770
Brand BRK
Back-Up Battery

Self-charging Lithium Battery

Dimensions (HxDia)

Ionisation Smoke Alarm: 53x140mm

RF Base: 30x140mm

Operating Temperature

+5°C to +38°C

Relative Humidity

10% to 85%

Sound Output

85dB

Warranty

5 Years

Weight 0.45kg
Product Datasheets
FAQs (6)
Q. Do you need an electrician to connect mains powered smoke alarms?
A.

It is necessary that an electrician installs mains powered smoke alarms.

Q. What sort of smoke alarm system would I need to install for a HMO?
A.

BS 5839-6 recommends that one or two storey HMOs with an individual floor area of no more than 200sqm (not the total of both floors) should have a Grade D smoke alarm system installed. Grade D refers to mains powered smoke alarms with a back up battery power supply. The alarms can be interlinked either by wire or by radio signal and the system does not require a separate fire alarm panel. For HMOs of 3 storey or higher, a Grade A panel system would need to be installed. This can cover the whole of the building, or can be used just for the communal areas with a separate Grade D system installed for the individual dwellings. For both applications, the level of cover should be a minimum of LD3 (in all escape routes) but this may change according to the fire risk assessment.

Q. When the test button is pressed on an interlinking smoke alarm will this cause all the other units to go off, too?
A.

Yes, by pressing the test button on one alarm all the units in that family will also be activated. To 'teach' the units which other smoke alarms belong to the same family, the smoke alarms have to be set up together during the installation. This is done by pressing a 'housecoding button' or similar process.

Q. If a false alarm goes off can pressing the hush button on any of the interlinking alarms stop all the units beeping?
A.

No, to stop the alarms from sounding the hush button on the unit that started the process needs to be pushed. Pressing any other unit will just silence that one unit. The unit can be identified by the rapidly flashing red LED.

Q. How long do the batteries last in smoke alarms?
A.

The 9V alkaline batteries and AA alkaline batteries generally last 12 to 18 months. Lithium batteries will usually last 5x longer than their alkaline counterparts, achieving around 5 years lifetime. Some lithium cells are also rechargeable, and when used in a mains-powered alarm may last for the entire functional lifespan of the alarm. Newer alarm models may also feature a "sealed" lithium battery. These batteries are specialist components which are designed to not be removed or need replacing by the user, and have been tested by the alarm manufacturer to ensure they last for the lifetime of the alarm.


Please note: the actual lifetime of your batteries depends on how often the alarms are tested or activated, as sounding the alarm draws more power than when the alarms are "waiting" to detect fire. You should also read your alarm's manual to make sure you only use the recommended types and brands of batteries, as failing to follow these instructions may cause the alarm to malfunction, not alerting you in the event of a fire, and might also invalidate the warranty.

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