interconnected smoke alarm Archives - Page 5 of 5 - Photoelectric Smoke Alarms

Australian Standard 3786:2014

Standards are documents that set out specifications, procedures and guidelines to ensure products are safe, consistent, and reliable. Australian Standard 3786:2014 is referenced by QLD’s Building Fire Safety Regulations 2008 – when a standard is referenced by state or national legislation, compliance with it becomes mandatory. It is interesting to note that although there is a newer Australian Standard 3786:2023 – it is not yet referenced by legislation – therefore Australian Standard 3786:2014 must still be complied with in the eyes of the law.

Australian Standard 3786:2014 is divided into several key components – the two of interest that will be reviewed in this article are ‘tests’ and ‘general requirements’.

Section 4.17 of the Australian Standard states that; ‘The smoke alarm shall be so designed that a sphere of diameter larger than 1.3 ±0.05 mm cannot pass into the sensor chamber(s)’. This requirement is intended to restrict the access of foreign bodies such as insects into the sensitive parts of the smoke alarm (to prevent nuisance alarms). It is known that this requirement is not sufficient to prevent the access of all insects; however, it is considered that extreme restrictions on the size of the access holes may introduce the danger of clogging by dust, etc.

Smoke Alarm Photoelectric Chamber – Insect Screen

How does this requirement translate into the design and manufacture of your photoelectric smoke alarm? The image below shows the compliant internal component from a ZEN wireless interconnected photoelectric smoke alarm. The polymer mesh screen surrounding the sensitive photoelectric chamber within the alarm contains thousands of tiny holes, each perfectly engineered, no larger than 1.3mm in diameter. The tiny holes prevent most insects from accessing the internal chamber whilst still allowing air (and smoke) to pass through.

Mesh screen surrounding the photoelectric smoke alarm internal sensor chamber

As per Australian Standard 3786:2014 – holes must be no larger than 1.3mm diameter

In addition to this internal mesh screen around the perimeter of the photoelectric chamber, the wireless interconnected photoelectric smoke alarm also has an outer grill which forms part of the housing of the alarm. The external grill also prevents larger foreign bodies from entering the alarm itself. Foreign bodies (i.e., insects) are a common cause of false / nuisance alarms because they can enter the sensitive internal components and disrupt the photoelectric light beam.

We hope you have enjoyed this review of Australian Standard 3786:2014 and how it translates to the design of your interconnected fire alarm. Whilst many smoke alarm retailers might profess to be aware of the standard, very few can claim to have read it from cover to cover or have a genuine understanding of what it really means.

Want to know more? Watch our ZEN quick start video or call us on 0478 596 402 today

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New Farm, QLD, 4005

As the winter chill gradually gives way to the warmth of a Queensland spring, we find ourselves emerging from the cozy hibernation of the colder months. Spring cleaning, gardening and home maintenance tasks become top priorities, and one crucial activity that should not be overlooked is checking your interconnected photoelectric smoke alarms. Whilst this may not seem like the most glamorous of springtime duties, it is undeniably one of the most important ones. The primary purpose of a smoke alarm is to protect you and your loved ones in the event of a fire. By checking them in the spring, you ensure that they are in good working condition and ready to alert you in case of an emergency.

Here’s how you should make checking your interconnected smoke alarms a regular springtime ritual.

Photoelectric Smoke Alarm Spring Cleaning

Did you know that the changing of the seasons can have an impact on your photoelectric smoke alarms? Over time, dust and debris can accumulate inside them, reducing their efficiency and increasing the possibility for nuisance alarms. Whilst you’re already in spring cleaning mode, why not take a few extra minutes to ensure your alarms are fully clean and operational? Gently vacuum around the exterior shell of your interconnected smoke detectors with the soft brush attachment from a vacuum cleaner to remove any cobwebs, dust build-up etc. which may have occurred over the winter months. Outside of this spring time activity it is recommended to clean your ZEN smoke alarms every 6 months.

Smoke Alarm Battery Check

Smoke alarms often rely on batteries for power, and these batteries can weaken or die over time. Fortunately most modern smoke detectors are now equipped with 10-year long life lithium batteries which are sealed inside the smoke alarm itself (after 10 years the entire smoke alarm is simply swapped out for a new one). However, if you still have an older style battery fire alarm which uses 9V replaceable batteries then spring is a great time to either replace the old batteries with fresh ones, or our recommendation is to upgrade to new battery fire alarms with 10-year long life batteries. So, go ahead, replace those dusty old 9V replaceable battery smoke alarms in springtime with the newest photoelectric smoke alarms equipped with 10-year long life batteries, and ensure your interconnected smoke alarms are always ready to do their job.

Photoelectric Smoke Alarm Testing

Testing your interconnected photoelectric smoke alarms is a relatively quick and straightforward task. You don’t need any special tools or expertise. Interconnected smoke alarms have a ‘test’ button that you can press to ensure they are working correctly. It’s a small effort for a significant safety boost. In QLD the smoke alarms must be interconnected (so if one smoke alarm activates, they all do). When testing your smoke alarms be sure to check that all the smoke alarms are interconnected and activate together, usually within about 10 seconds of the test button being pressed on the first interconnected fire alarm. If not, it’s time for some troubleshooting or possibly a replacement. Outside of this spring time activity it is also recommended to test your ZEN smoke alarms monthly.

Smoke Alarm Expiry Date

Smoke alarms don’t last forever and should be replaced 10 years from the date of manufacture. According to Australian Standard 3786:2014, the smoke alarm date of manufacture should be printed on the rear of the smoke alarm – go on, have a look. If they’re older than 10 years then they should be replaced with newer models. Why? Photoelectric sensors and other internal components can degrade over time, leading to a less effective smoke alarm.

Photoelectric Smoke Alarm Location

Whilst you’re at it, double-check the placement of your interconnected smoke alarms. Are they strategically positioned throughout your home as per Queensland smoke alarm laws? In Queensland there should be one interconnected smoke detector inside each bedroom, the interconnecting hallway outside the bedrooms, and at least one on each level of your home. If there is no interconnecting hallway outside the bedrooms then a smoke alarm must be installed outside the bedroom and other parts of the storey. Proper placement can make all the difference in early detection.

Photoelectric Smoke Alarm Placement Recommendations

Teach Your Family About Smoke Alarms

Checking your interconnected smoke alarms in the spring also presents an opportunity to educate your family about fire safety (especially children). Show them how to test the alarms and what to do and who to call in case they hear one go off. Surprisingly, young children may not automatically associate the sound of a smoke alarm with danger. This knowledge can be invaluable in an emergency situation. Phone 000 (triple zero) for the Queensland Fire Brigade in a real life fire emergency situation. If you do not already have one, spring time is a great opportunity to develop a home fire escape plan and rehearse it with your family.

Conclusion

So there you have it, as you embark on your spring cleaning rituals and home maintenance tasks, don’t forget to check your interconnected smoke alarms. It’s a simple yet essential step to ensure the safety of your home and loved ones. With working interconnected smoke alarms in place, you can enjoy the beauty and rejuvenation of a QLD spring with the peace of mind that you are well-prepared for any potential fire-related emergencies. So, make it a springtime tradition to give your ZEN smoke alarms the attention they deserve – because the safety of your loved ones always comes first.