Kidde KF20 Optical Smoke Alarm – Mains/Battery backup (717)

Mains-powered optical smoke alarm that can be interlinked with up to 23 other Kidde mains alarms, be they ionisation, optical or heat.

Once interlinked, the detection of the relevant danger by an individual unit will sound across all the connected alarms.

Optical alarms are for use in escape or circulation routes and in areas where there is a danger of ignition of furniture and surroundings by cigarettes producing slow, smouldering fires.

This mains-powered unit should be installed by a qualified electrician and can be used throughout the home, except in the kitchen where a Firex Heat Alarm is recommended. These alarms comply with UK Building Regulations for new housing and associated standards (Grade D BS 5839, Part 6).

• Interlink with up to 23 Firex hard-wired alarms – all alarms sound if danger is detected
• Alarm memory – identifies source unit within interconnecting network
• Combined Test/Hush button allows regular testing of alarm function and can be used to temporarily silence nuisance alarms,/li>
• Auto reset after activation
• Tamper-resistant locking device – prevents unauthorised removal without the use of a tool
• Mains operation – 9V Alkaline back-up battery supplied as standard
• Model KF20
• Power Supply 230V mains-powered with 9V Alkailine battery back-up
• Temperature Range 0ºC to + 40ºC
• Humidity Range Up to 93% Relative Humidity (RH) non-condensing
• Storage and Transport -20ºC to +60ºC and 5–95% relative humidity (RH) non-condensing
• Alarm Dimensions 127 x 127 x 39mm
• Bracket Dimensions 133 x 133 x 6mm
• Alarm Weight 242g
• Warranty 6 years
• Approvals BSI certified to BS EN14604:2005
• CE tested and certified Sensor Optical, circular lateral chamber with insect-resistant width slot entry portals and added bug screen mesh
• Chamber Size 35mm outside diameter x 16mm depth approximate (external)
• Detection Band Infrared light wavelength
• Button Test Simulates the effect of smoke within the sensing chamber, checks electronics and sounder
• Automatic Self-test Circuitry is tested and unit beeps (chirps) if fault is detected
• Supply Voltage 230V AC, 50 Hz (nominal UK voltage)
• Power Consumption < 15mA
• Connection Push-in/snap-fit type connector with 150mm long flying leads (supplied)
• Battery Back-up User-replaceable alkaline 9V battery (522/6LR61)
• Power-on Indicator Continuous green LED
• Alarm Sounder Electronic piezo-electric sounder (T3 pattern sound – 3 pulses – space – 3 pulses), soldered contacts
• Sound Output 85dB (A) minimum at 3 metres
• Alarm Frequency 3.2 kHz typical
• Dust Protection In-built foam gasket in rear of alarm to prevent dust ingress into rear of the alarm
• Alarm Status Red LED flashes approx once every five minutes = normal operation
• Red LED flashes once a second = sensing smoke (sounder alarm sounds)
• Red LED flashes once every ten seconds = in hush condition (auto-reset after 15 minutes)
• Interconnection Up to 24 Firex and Kidde ‘Slick’ units (smoke, heat and CO) can be hardwire interconnected with optional control (see below)
• Optional Controls Wired Remote Test and Hush Unit (REMTH) allows test and hush of interlinked units
• Optional Pattresses SMK23RU also has integral switchable relay for operating remote devices
• SMK4896 – Surface mounting base for added ease of installation
• Fixing Mounting bracket ring supplied with two ‘T’ slot fitting option
• 57mm spacing to a maximum of 90mm for standard screw fittings on back boxes
• Bracket has 50mm diameter central access hole for cabling
• Plastics used NORYL – Cover, main body and mounting bracket
• Lead-Free Status All Firex alarms are lead-free