The BRK 790MRL (also known as ) mains powered heat alarm with re-chargeable lithium back-up battery is Kitemarked to the latest British Standards and has a 5 year manufacturer's warranty. Up to 12 smoke and heat alarms from the BRK 700MRL series can be interlinked (via cable) within a single system, allowing all alarms to activate if one is triggered by fire. The 790MRL is suitable for installing in kitchen areas and garages.
- 230V mains powered heat alarm
- Re-chargeable lithium back to battery - no need to replace for the life of the alarm
- CE marked and Kitemarked to BS 5446-2
- 5 year manufacturer's warranty
- Suitable for installations complying to BS 5839-6: 2013 Grade D, E and F
- Detects increases in room temperature
- Ideal for kitchens and garages where a smoke alarm would be unsuitable
- A maximum of 12 alarms from the 700MRL series can be interlinked (via cable)
- An interlinked system provides the earliest warning of fire
- Test button facility
- Easy to install push-fit base plate
Please note: this product is not a direct upgrade from the 690MBX heat alarm. Upgrading from a BRK 600MBX series alarm featuring an alkaline battery and twist-on base .
The table below shows all the units that can interlink with the BRK mains powered smoke and heat alarms.
Alarms from the Same Series
||Type of unit
||Type of interlink
||Ionisation Smoke Alarm
||Hard wire interlink
||Optical Smoke Alarm
||Hard wire interlink
||Hard wire interlink
This is the technical data for the Mains Powered Heat Alarm with Lithium Back-up Battery - BRK 790MRL.
|Alternative Product Codes
||BK790, 790, 790MRL, BK790MRL
||85dB at 3m
||Sealed long life lithium
||+5 °C to +38 °C
||10% to 85%
The following datasheets are available for this product.
Q. What smoke alarm should I use in a bedroom with an en suite bathroom?
A. It is usually recommended to install an optical smoke alarm in a bedroom. This is because optical smoke alarms are slightly quicker at detecting slow smouldering fires that can originate from upholstery type materials and over-heated wiring. Also, an optical smoke alarm would be less likely to sound a false alarm than an ionisation would, if steam/water droplets were present from the bathroom. Detectors should be installed as central to the room as possible; however for your application I would also consider the position of the en suite to make sure that the detector is not in the direct path of the joining door. This is just to try and avoid the chances of a false alarm. No detector is designed for use in bathroom areas.
Q. How do I safely dispose of my old smoke alarms?
A. Safelincs is signed up to Valpak's WEEE (Waste Electrical and Electronic Equipment) Distributor Take-Back Scheme (Registration ID: 7370). Private households can therefore drop off their electronic and electrical fire safety waste at their municipal recycling centre when they are purchasing new products from us. To find your nearest recycling centre, please visit www.recycle-more.co.uk.
Q. Can the mains powered smoke alarm range be connected to mains power via the lighting circuit?
A. Yes, hard-wired mains powered alarms can be wired to the unswitched live feed of the nearest frequently used lighting circuit.
Q. is there a different alarm sound for optical and heat sensors to tell you the difference in what kind of fire it is?
A. There is only one alarm sound type when a fire is detected, when interconnected all smoke and heat alarms will sound. However only the triggered alarm will have a rapidly flashing red indicator.
Q. How long do the batteries last in smoke alarms?
A. The 9V alkaline batteries last 12~18 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.
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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.