OG20 Mains Photoelectric Smoke Alarm
Part #: OG20
Mains-powered optical smoke alarm that can be interconnected with up to 18 other mains alarms, be they ionisation, photoelectric or heat. Once interconnected, the detection of the relevant danger by an individual unit will sound across all the connected alarms.
KEY FEATURES
- Interconnectable with up to 18 hard-wired alarms – all alarms sound if danger is detected
- Alarm memory – identifies source unit within interconnecting network
- Reduced energy consumption – lower lifetime running costs
- Dust compensation and bug screen – reduces nuisance alarms
- Combined Hush/Test button allows regular testing of alarm function and can be used to temporarily silence nuisance alarms
- 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
WHERE TO USE
Photoelectric alarms are for use in escape or circulation routes and in areas where there is a danger of ignition of furniture and surroundings 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 Heat Alarm is recommended. These alarms comply with AS 3786:2014 standards.
GENERAL FEATURES
| Feature | Description |
|---|---|
| Model | OG20 |
| Power Supply | 240V mains-powered with 9V Alkaline 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 | 10 years |
| Approvals | AS 3786:2014 |
| Attribute | Description |
|---|---|
| Sensor | Photoelectric, circular lateral chamber with insect-resistant width, 9-slot entry portals |
| 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 | 240V AC, 50 Hz |
| 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 – three pulses – space – three pulses) with soldered contacts |
| Sound Output | 85 dB (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 10 minutes) |
| Interconnection | Up to 18 units (smoke and heat) can be hardwire interconnected |
| 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 mains alarms are lead-free |
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