HVAC&R Nation July/August 2019 by AIRAH

New tricks The pros and cons of mature‑age apprenticeships

Skills

WORKSHOP

Managing noise in ductwork systems

Snakes on a drain! Ants in the plant, possums in the plenum, and other HVAC animal crackers July–August 2019 / ISSUE 123

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July–August 2019 / ISSUE 123

Snakes on a drain! 20

HVAC&R Nation is published by the Australian Institute of Refrigeration, Air conditioning and Heating (Inc). AIRAH – National Office James Harrison Centre 3/1 Elizabeth Street, Melbourne VIC 3000, Australia. Tel: 03 8623 3000

Fax: 03 9614 8949

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Magazine team Communications Manager Matthew Dillon matt.dillon@airah.org.au Tel: 03 8623 3000

Editor Mark Vender mark.vender@airah.org.au Tel: 03 8623 3022

Contributing writer

Caption

Sean McGowan talks to fridgies from around the country about their sometimes hair-raising, sometimes stomach-turning encounters with Australian wildlife. We look at how you can protect clients’ HVAC&R systems – and yourself!

Sean McGowan

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HVAC&R Nation regulars

Skills Workshop

Glenn Douglas glenn.douglas@airah.org.au Tel: 03 8623 3018

Managing noise in ductwork systems

See what’s new in the ‘Shed

John McGrath john.mcgrath@airah.org.au Tel: 03 8623 3007

The Toolshed

Global Update Industry news from around the world

ISSN 1834-9522

HVAC&R Nation is printed on paper sourced from well manned forests and other controlled sources.

Disclaimer HVAC&R Nation is an official publication of the Australian Institute of Refrigeration, Air Conditioning and Heating Inc. Statements expressed in HVAC&R Nation do not necessarily reflect the policy or views of AIRAH or its members. No responsibility is accepted by AIRAH, the Editor or HVAC&R Nation’s supply partners for the accuracy of information or for errors or omissions. HVAC&R Nation is distributed without charge to all financial members of AIRAH. The publisher reserves the right to alter or omit any article or advertisement submitted and requires indemnity from advertisers and contributors against damages or liabilities that may arise from material published.

Exclusive to this issue

Cool Tech This invention flips traditional beer service on its head

Safety Matters Dealing with dangerous spills is a matter of planning

TAFE News We look at two new training facilities in Ashmore, Queensland and Chadstone, Victoria

Around the Nation Who’s in the news?

No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, mechanical, photocopying, recording or otherwise, without permission of the Publisher.

13,314

New tricks

As the need for new workers continues to rise, could mature-age apprentices help meet the demand? We talk to teachers, employers and the apprentices themselves about the pros and cons of coming to the trade later in life.

Smoko with . . . Q&A with Chris Watts

March 2019

PLEASE CONSIDER THE ENVIRONMENT AND RECYCLE THIS MAGAZINE IF YOU ARE NOT GOING TO KEEP IT.

Green Wedge Help the environment and enjoy it at the same time with this electric 4x4

Lighter Side The shonkier side of the nation July–August 2019

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HVAC&R Nation

Ed’s letter

WILD AT HEART In Australia, we are by and large very proud of our amazing country. So I find it really funny that when we get talking to an overseas visitor, we usually brag about things that aren’t so good. In fact, the worse, the better.

Sport is a classic. First we’ll explain that “football” in Australia can mean a number of things, depending on which state you’re in. But we will proudly point out that, whatever the code, they all play without helmets and could get their blocks knocked off. And cricket? We love watching people’s looks of disbelief when we tell them a test match goes for five days – and you might not even get a result at the end of it! If we’re anywhere near a kitchen, we might prepare a Vegemite sandwich for our unfortunate visitor.

Air conditioning is there

Then cack ourselves as they try to swallow it. No offence is taken. Really, the more they choke in amazement that anyone could consider this delicious, the happier we feel.

to insulate us from extreme

But maybe the thing we’re most proud of is our fauna, especially the deadly stuff. Go for a swim at our pristine beaches – but look out for the great white sharks. Enjoy a walk through our beautiful bush – just don’t step on a taipan. And before you put your boots on, better check there isn’t a redback or funnel web in there, OK?

and here is nature finding

When it comes to venomous creatures, we are world champions. This month’s cover feature doesn’t contain any really lethal specimens, but it does show the weird and wonderful creatures that Aussie HVAC&R technicians come across on the job. It also has some advice for what to do if you have a close encounter. It’s ironic in a way, because air conditioning is there to insulate us from extreme natural conditions – and here is nature finding a way to break back in. Dig a little deeper, and I reckon it reflects a complicated relationship with our own country. On one hand it’s beautiful; on the other, deadly. Speaking for myself, I grew up thinking of the land as an adversary, something that you needed to subdue, or protect yourself against.

natural conditions –

a way to break back in Drawing a long bow here, but I reckon it touches on something really important: our identity. And I like to think that over time this has evolved. Putting a snake on the cover is obviously a tactic to make people stop and look at the magazine, but I hope it shows the beauty just as much as it evokes the danger. As snake expert Stuart McKenzie points out in our story on page 20, “they are misunderstood by many, but hopefully with time that will change. Snakes play a pivotal role within the environment and without them ecosystems simply wouldn’t function as well.” Happy reading, @AIRAHnews

Mark Vender Editor mark.vender@airah.org.au

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July–August 2019

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HVAC&R Nation

Toolshed 1

Purifying power

“GripperFix is quick and simple to install, preserves warranties and lasts as long as the roof itself.”

Panasonic has released a new range of air conditioning products incorporating remote control and voice control technology, along with the new nanoe X air purifying system.

The system can be used for split system condensing units, duct supports, communication equipment, service walkways, HVAC units, satellite dishes, light fixtures, inverters, conduit and other utilities.

Nanoe X has been developed to improve air quality by neutralising pollutants such as allergens, bacteria and odours. Sensitive Choice – a community program developed by the National Asthma Council Australia – recognises the technology as suitable for those with asthma or allergies.

“Whether installing on concealed fix, pierce-fix (exposed-fix), or trapezoidal metal roof profiles, GripperFix’s aluminium and stainless construction preserves roof integrity,” says the company. “It also eliminates corrosion, leaks, rust and algae, and allows free flow of rainwater under the rails.”

“With one in nine Australians having asthma, it is crucial that organisations design and develop products and services keeping those 2.5 million people in mind,” says Sensitive Choice program manager Adele Taylor. “Panasonic’s new 2019 nanoe X purification solution has been rigorously reviewed by our expert product advisory panel, and has been proven to offer a potential benefit to those with asthma or allergies.”

Go to www.makfasteners.com.au ■

The nanoe X sensor is available for Panasonic’s four-way cassette system, as well as the premium reverse-cycle system.

The new 2019 range also includes reverse-cycle wall split systems, multi-split systems (both indoor and outdoor), whole‑house-ducted systems as well as light commercial solutions.

Available in 420 and 389L versions, the FX fridge has a clean and modern design with recessed door handles. The vegetable crisper is about 5L bigger than previous models and has a VitaLED lighting system. And the icebox can be moved anywhere in the freezer, or completely removed.

Go to aircon.panasonic.com.au ■

BOC’s beacon

Leading gas company BOC took advantage of the recent National Manufacturing Week to unveil its new Beacon IIoT technology. BOC believes it will transform the way customers check, track, monitor and order gas. The new telemetry system connects BOC bulk tanks and cylinders to a network of smart devices that send real-time data collected by sensors to the new Beacon customer app.

“The Beacon technology and network will allow BOC and our customers to make smarter decisions, faster, with gas levels and location tracking for each vessel visible through the app anytime, anywhere,” says BOC South Pacific’s head of sales and marketing, Theo Martin

As we see all too often in the Lighter Side section of HVAC&R Nation, improperly installing utilities on a metal roof can compromise both the equipment and the integrity of the roof itself. One solution is the GripperFix system from MAK Fastener Specialists. “The GripperFix system, combined with S-5! non-penetrating clamps or S-5! brackets with our lifetime EPDM ‘double-seal’ performance rubber gasket are the right way to mount almost anything to any metal roof,” says the company. |

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Cool but not costly

“The INDEC range uses a patented indirect polymer heat‑transfer core that can deliver 100 per cent fresh air indoors with very low energy consumption,” says the company.

Get a grip

HVAC&R Nation

The models are available in white, stainless steel, and shiny black.

Armcor has released the INDEC, an indirect evaporative cooler that it claims is capable of reducing fresh air from 40°C to 18°C without adding moisture and without any refrigeration process. This means it saves up to 50 per cent on energy consumption compared to refrigerated cooling systems.

Go to www.boc.com.au ■

“In Australia, we’re fortunate to have an abundance of fresh and seasonal produce readily available, which means we can entertain and experiment with cooking all year round,” says Adele. “With Australian families buying more and more fresh produce, the bigger vegetable crisper and moveable interior capacity in the FX series allows for significantly more usable space.”

BOC is rolling out Beacon technology across its national network of bulk gas and Cryospeed liquid tanks, with cylinder packs and cylinders to follow.

Business development executive Jean-Marc Adele says the new release continues Mitsubishi Electric’s commitment to successfully deliver cutting-edge appliances designed with the everyday Australian top of mind.

Go to www.mitsubishielectric.com.au ■

“This will benefit any manufacturer, from small welding workshops with a Cryospeed and Mixonsite system, right through to a large manufacturer with hundreds of gas tanks and cylinders onsite.”

Crisp design

Mitsubishi Electric Australia has expanded its offering of top‑mounted refrigerators with the release of the FX range.

The models are sized from 2.0–22.4kW and all feature R32 refrigerant.

GripperFix requires only clamps or piercing fasteners, tabs (as needed for the specific utility application), and the rails. It has been designed to distribute the load over multiple bearing points (panel ribs), and is suitable for KLIP-LOC and Speed Deck Ultra profiles as well as TRIMDEK and other pierce‑fix roofs.

July–August 2019

The units range from 1,000L/s to 15,000l/s and are available with an optional hot water coil for heating. INDEC units are also built with DX systems where required.

“The INDEC offers new energy-saving possibilities for designers and engineers who need to reduce power consumption on their projects, especially when using large amounts of fresh air,” says Armcor. “Installations include data centres, fast-food outlets, lobby ventilation, wine vats, Green Star buildings, leisure centres, generator rooms, factory areas, kitchen exhaust and farm packing sheds. Contact Armcor for your particular application.” Go to armcor.com.au ■

Toolshed 6

Inside job

Aeroseal is a computerised duct-sealing process designed to seal leaks throughout entire duct and ventilation systems quickly and effectively, without the costly demolition or disruptions of traditional duct-sealing methods.

Hydronic highlight

IMI Hydronic Engineering has extended its TA-Slider range. “The extended range is now fully compatible with the most common BUS communication systems: KNX, Modbus and BACnet protocols,” says the company. “It also includes versions specifically designed for changeover systems – whether controlled by analogue or digital communications signals.”

Applied as an aerosol mist, Aeroseal is blown into the interior of the ductwork where the microscopic particles of sealant automatically locate and seal the individual leaks throughout the system – even those that would otherwise be inaccessible using traditional methods. The patented Aeroseal technology pressurises the duct system with an aerosolised vinyl acetate polymer. This finds the leaks thanks to pressure differential between inside and outside. Monitoring of the procedure provides real-time data about the sealing process in progress, eliminating the need for retesting.

Like all TA-Sliders, the new models can be configured onsite using the TA Dongle and HyTune smartphone app. The app provides access to more than 200 actuation settings to help customers specify desired flows and view system diagnostics without the hassle of setting DIP switches. It lets technicians access visual control, confirm new configurations, and get a comprehensive overview of actual operating parameters from the palm of their hand.

The process has been developed to seal any holes up to 15mm. On completion, customers receive a test certificate showing the pre-seal and post-seal leakage rates.

TA-Sliders work in conjunction with the TA-Modulator – a pressure-independent balancing and control valve for modulating control.

Developed by the US Department of Energy, Aeroseal has been used to meet tightening building code requirements. It has significantly improved the building performance of thousands of new and existing homes, commercial buildings, hospitals, schools, laboratories and other buildings around the globe.

According to IMI Hydronic Engineering, TA-Modulator delivers precise room temperature control, can reduce annual energy bills by up to 18 per cent and, thanks to automatic balancing, minimises system noise and overflows. It can improve the energy efficiency of chillers and boilers, enhance system reliability, and simplify installation and configuration.

Go to www.aerosealductsealing.com.au ■

Go to www.imi-hydronic.com ■

DO YOU HAVE A NEW PRODUCT TO GO IN THE TOOLSHED?

Email mark.vender@airah.org.au All submissions received will be considered, though publication cannot be guaranteed.

July–August 2019

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HVAC&R Nation

Global Update

BRAZIL

INDIA

HOT MARKET

TAKING ACTION ON AC

While Australia sweated it out over the 2018/19 summer, Brazil was also dealing with record heatwaves. January was the hottest month on record in parts of Brazil, including its biggest city, São Paulo. There, 32 elderly people died in just two days when temperatures exceeded 40°C. Not surprisingly, people who had air conditioning systems were turning them on. Nationwide energy consumption rose to all-time highs, doubling spot energy prices to beyond 800 Reals (Au$295.50) per kWh. Sales of new air conditioning units also went through the roof. According to the Brazilian Association of Refrigeration, Air Conditioning, Ventilation and Heating (ABRAVA), first-quarter sales of split-type room air conditioners increased by 28 per cent. Demand was so high it led to product shortages. Meanwhile, sales of packaged air conditioners and chillers grew by 20 per cent. ■

Now summer moves to the northern hemisphere. And it started early in India, where the states of Madhya Pradesh, Maharashtra and Rajasthan saw daily highs of 42°C during April and May. This has added to cooling demand in a country that is only just starting to take up the latest HVAC&R technology. The number of air conditioners in India is expected to rise from 15 million in 2011 to 240 million in 2030. With this in mind, the government has launched the India Cooling Action Plan. The UN has hailed it as the first holistic plan from any national government. “By accelerating and integrating policies, regulations, workforce training and research and development, this plan mobilises government, industry and society to ensure thermal comfort for all while keeping to our international environmental commitments,” says the government. ■

RUSSIA

USA

WORLDSKILLS WARM-UP

CAMRY IN COURT

Australian WorldSkills champion Patrick Brennan has travelled to Kazan with a select group of fellow Skillaroos to compete in the Russian national tournament. The trip was organised as preparation for the International tournament, to be held in Kazan in August. It was Brennan’s first time outside Australia, and a great chance to get used to Russian conditions before the international competition. He placed third overall, against competitors from Russia, China and Chinese Taipei.

A class action lawsuit will go ahead in California for air conditioning smells in 2012–2015 model Camrys. The lawsuit was filed by two Camry drivers, Gloria Ortega and Alfred Salas. Ortega says the air conditioner in her 2012 Camry emits a smell like dirty socks. Salas, meanwhile, allegedly has to cope with a smell “like dried-up urine in a fabric that’s been out in the sun”.

“Considering that we travelled 20-plus hours to a strange country with a different language, tools and equipment and the pressure to do well, this is a good result,” says trainer Carl Balke, who also travelled to Kazan.

According to the lawsuit, Camry occupants get sick from the mould that builds up on the evaporators that collect heat from the passenger cabins. In addition to moisture, the plaintiffs claim outside vents allow dead insects and leafy materials to enter the air conditioning systems.

“We still have aspects to improve upon in the days of training left, but he is better placed to take on Kazan in August.” ■

The judge ruled that there are “triable issues regarding the existence of a design defect that causes the foul odours at issue.” ■

HVAC&R Nation

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July–August 2019

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July–August 2019

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HVAC&R Nation

Feature

NEW TRICKS Australia’s HVAC&R industry benefits greatly from the diversity of its workforce. This month, Sean McGowan talks to technicians taking up their tools later in life – and investigates how mature-age apprentices could help solve our skills shortage. to someone older – sometimes much older – who is making a career change.

In recent times professional sports leagues such as the AFL have recognised that mature-age players from lower leagues can bring plenty to the table. Boasting greater experience and the maturity gleaned from real life, they can help teams much more quickly than their fresh-faced younger colleagues.

Whether they be miners, cabinet makers, administrators, or even people who have spent many years in the industry in other roles, mature‑age workers often share common traits: passion and dedication to their new career.

A similar approach is being taken by some employers in the HVAC&R industry to help address the much‑talked-about skills shortage.

I definitely feel more focused and driven to learn due to my experience

Visit TAFEs around the country and you’re likely to find a teenage apprentice studying next |

HVAC&R Nation

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At 27 years of age, South Australia’s Matt Benger, Stud.AIRAH, is in the first year out of his apprenticeship. He works as a refrigeration mechanic in the commercial and industrial sectors with Air Comfort Services.

Pathway

Fact: school leavers entering the industry are considered blank canvases, ready to learn. That’s not necessarily a bad thing. But there are increasing numbers of apprentices who already have gained real‑world experience in other trades or professions who are now embracing HVAC&R.

MINES TO MAINTENANCE

in the workforce |

July–August 2019

I was interested in a career in the HVAC&R industry straight out of high school, and explored different avenues to obtain an apprenticeship. But while I was enrolled and waiting to begin the Cert II in Electrotechnology at TAFESA, I was offered a job in the mining industry. I spent the next four years working underground at Olympic Dam, 550km north-west of Adelaide.

Feature Matthew Benger, Stud.AIRAH, was the SA Apprentice of the Year in 2018.

Cairns seems to have more mature-age apprentices than not, so I would say the times are changing I had previously completed a cabinet-making apprenticeship, so the tool side was very easy for me to pick up, but the technicality of HVAC&R sparked my interest. If it wasn’t for my brother’s encouragement and belief in me, I wouldn’t have chosen it. But I am so glad I listened to him.

Biggest obstacles After four years I knew I wanted to move back to Adelaide and attain a trade to set myself up for the future. Luckily a friend of mine worked in the HVAC&R industry and provided a pathway for me to begin an apprenticeship with Air Comfort Services.

Biggest obstacles My biggest obstacles were probably financial – sacrificing a high-paying job in the mining industry to pursue my passion in HVAC&R while paying two mortgages and all the other financial responsibilities that come with living out of home.

Advice If you are passionate about the industry you want to move into, then do it. The knowledge, skills and mental benefits from doing something you truly enjoy will have a positive impact on all facets of your life, not just your career. There is nothing worse than slugging it out for eight hours a day doing something you hate, when you could be doing something that stimulates and interests you.

MUM’S THE WORD

At the time of considering a career change I also thought that companies wouldn’t want to take on a mature-age apprentice because they are paid a higher rate than a school-leaver. But luckily for me this wasn’t the case with Air Comfort Services.

A mother of four, Jennah Wone is a third-year refrigeration apprentice working for Recharged Air and Electrical in Cairns. Last year she was named the TAFE Queensland Cairns campus Female Student of the Year.

Work and life experience

Pathway

I definitely feel more focused and driven to learn due to my experience in the workforce. I have a very strong work ethic, and am constantly taking on new challenges and studies to improve my knowledge wherever I can, like enrolling in the Diploma of Refrigeration and Air Conditioning at TAFESA while I was still an apprentice.

My brother is a qualified refrigeration technician, and after 18 years of working for other companies he decided to start his own business in Cairns. I was working from home on my hobby business and started giving him a hand here and there, until one day we had a coffee and chat and he offered to take me on as an apprentice.

I didn’t encounter any obstacles around work – it was more around sorting out my family for our new routines. Working around my kids is the biggest hurdle I have, especially being a single parent, but I find bosses are a lot more lenient when it’s sick kids than if you are sick as a result of weekend choices!

Work and life experience I had my kids young and without that part of my life complete I would not have the focus I have now. It sounds like a cliché, but this trade has changed our lives. I work with other apprentices who, although technically mature-age apprentices, are still young by comparison, and the difference in our learning styles and focus is evident. The relationships formed on jobs, or with suppliers and clients, is also something I know would not have been possible with my younger self. I am here for a purpose now and that focus has not wavered.

Barriers I honestly don’t see barriers because I refuse to accept them. I have been in male-dominated trades since I was 21, and admit that it has come a long way. I was also the first female in my cabinet-making class in Queensland, and then in Victoria, so I’ve pushed a few comfort zones over the years – mainly mine.

I didn’t have the same desire straight out of school, but now that I know what I want and have a job in an industry that I want to be in, I have a passion to excel within my career.

Being a mature-age apprentice and female, it never really occurred to me that I would be different. Cairns seems to have more mature-age apprentices than not, so I would say the times are changing, especially in our trade.

Day-to-day challenges

Employer advantages

Some mature-age apprentices I work with must juggle work, study and a young family while earning a lower income. It can also be difficult for some people to return to school after spending time out in the workforce.

The dedication and focus. Anyone taking the pay cut and demotion this far in life will always give their 100 per cent. We are here for a purpose, and focus is something we have had time to perfect.

Mature-age discrimination?

Employer advantages

I personally have never experienced any discrimination for age, size or gender. I get the odd person who asks if I’m going to be doing the job, but otherwise I just react positively and keep at it. I guess it comes down to how confident you are in your role too. I work under blokes nearly 10 years younger than me and we have workplace banter but total respect for each other.

The main advantage is that you are employing someone who likely has a passion to learn and previous life experience that gives them the desire to be the best employee that can be. Air Comfort Services employs five mature-age apprentices, and every one of them has an unrivalled work ethic and is great at carrying out tasks without needing to be asked. They are keen to learn on the job, and constantly request to carry out any works with the technician’s guidance. They’re also not scared to ask questions, even if they think they might sound stupid, which is something younger apprentices are usually fearful of.

Advice

Third-year refrigeration apprentice Jennah Wone.

Just do it! This is the perfect trade to enter if you want variety and challenge – a real career with many areas to specialise or even start a business in. It can be a well‑respected and well-paid career for life.

July–August 2019

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HVAC&R Nation

Feature

Wages are the biggest barrier, both from an employer’s and an apprentice’s perspective ill-suited to and did not gain satisfaction from. Then there are those attracted to the industry because they perceive that trades are better paid than a lot of office-based work.

The wage barrier Wages are the biggest barrier, both from an employer’s and an apprentice’s perspective. The award rates – especially the metal award – are higher for adult apprentices, but it is still not high enough for someone with financial commitments to live on. The electrical and plumbing awards are more generous, but some companies who use these awards are reluctant to hire a mature apprentice due to the increased cost.

The Degree C team, including mature-age apprentice Bradey Young (far right)

FROM THE EMPLOYER

later in life, so the pay cut is not as hard for the individual to deal with.

Leading Tasmanian multi-trade contracting company Degree C has had a long history of employing mature-age apprentices. Divisional manager Chris Fontana, M.AIRAH, says the company employs six mature-age apprentices in the south of the state, ranging from first-year to fourth-year apprentices.

Generally mature-age apprentices have settled down and quite often have families and financial responsibilities. They may have also come from a job where there was no defined career path and little opportunity for personal growth.

Someone from a construction background will have a big advantage. Mature-age apprentices coming from this background usually come with a set of tools, and they already know how to measure and fasten all types of materials, read plans and are usually physically and mentally stronger than a younger apprentice straight out of school.

Interpersonal skills

The skills shortage It would be nice to see more government incentives to help people wishing to take on an apprenticeship www.airah.org.au/nation

The growing trend that I am seeing is mature people that have been in office-based occupations, many with university qualifications, wanting to gain a trade. The advantage of this type of mature apprentice is that they are highly motivated. They come with a lot of pre-existing soft skills, especially when you compare them to apprentices who have taken up the trade because they were pushed into it by a parent or didn’t have a better prospect at the time.

This is very important, as all employees are the face of the company they work for. They need to be able to communicate effectively and present a positive image of the company they represent. It comes down to the individual, but life experience usually refines interpersonal skills.

Mature age v school leavers

Why employ a mature‑age apprentice?

But that’s not taking anything away from younger apprentices, as all these skills come with life experience.

HVAC&R Nation

THE TAFE EXPERIENCE

It’s really a company-by-company prospect. Some recognise the benefits of a more mature apprentice, while other companies do not. In my experience, when companies advertise for apprentices, the number of applications is so low that it is difficult for them to be selective about what they want.

A particular set of skills

We are approaching a stage where it is worth asking if the market is delivering us the desired outcome, or if some form of increased subsidy from government would provide an effective solution.

Mature-age as an industry trend

Being qualified in any of the HVAC&R trades can open doors and opportunities that may not have been previously available.

It would also be great to see more off-campus training tools to increase flexibility in study times and minimise the impact on employers of apprentices spending weeks at trade school.

Lachlan McGrath, Affil.AIRAH, has been teaching refrigeration and air conditioning courses at RMIT in Melbourne for about 12 years, interspersed with stints working back in the industry. He says the average age of apprentices and students is on the rise.

Advantages

The whole question of what a mature apprentice should earn is complex, as cost-of-living pressures are stopping good people from entering the industry. But on the flip side, too high a wage will have the same result.

This, in my opinion, is a natural correction of a system that placed more prestige in white-collar positions and undervalued blue-collar jobs, and thus pushed a lot of people into work they were July–August 2019

Life skills and maturity help, but in my experience the most important factor in the success of any apprentice is whether they chose this industry and are passionate about it. Where a lot of mature-age apprentices have an advantage is exactly this – they have seen enough of the workplace and have made an active decision to join our industry, and this is what makes them great contributors. But I have also seen mature apprentices who have entered the industry because a job has fallen into their lap and they do not necessarily have a passion for the work. In my opinion, these candidates are usually difficult to train, and sometimes more so than their younger colleagues.

Love the work Those who really do love the work have very little difficulty. There is a strong correlation between those people who love to work on cars, motorbikes and boats in their spare time and those who gain a strong passion for this work.

Advice If you want to join the industry because you love working with your hands, enjoy problem-solving and want to work with a large variety of people in a diverse set of locations, then you will find the sacrifices required to join the industry worth it. If you want to join the industry purely for financial reasons, then you may struggle to meet this goal. The long-term rewards in this industry tend to be accumulated by the most passionate operators. ■

CONTROL

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Much More Than a 7 Day Controller This makes Wi-Fi Control ideal for families on the go. You no longer need to physically walk to each room to check the temperature or to turn a unit on or off.

Control Multiple Units Wi-Fi control is available with all Mitsubishi Electric range. Customise the settings of each air conditioner in the work place or home.

NEW Wi-Fi Voice Control with Amazon Alexa and Google Assistant Mitsubishi Electric air conditioning systems connected with Wi-Fi are enabled with Amazon Alexa and Google Assistant!

*Optional upgrade adapter required per unit. Requires an internet connection and the App downloaded from the App Store or Google Play Store on your smartphone or tablet with the latest Operating system available.

For more information on our products please visit www.mitsubishielectric.com.au

Phone:1300 280 625

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Cool Tech

BASE INSTINCTS The Bottoms Up system turns traditional beer service on its head. Sometimes a solution comes along to a problem you never knew existed in the first place. Let’s file the Bottoms Up beer-dispensing system into this category. Inventor Josh Springer claims he “had a daydream” at his dad’s birthday party and silenced the room by announcing how cool it would be to have a beer pitcher that filled from the bottom. His audience was unimpressed, and his father went as far as to say that it couldn’t be done. That was all the motivation Springer needed, and four days later he had built a prototype.

Using a clever system of magnets and bespoke cups, Bottoms Up fills beverages through the bottom. Once the liquid (usually beer) reaches a designated level, a magnet seals off the base. “Bottoms Up is specifically designed to eliminate user error, reduce waste and decrease transaction times for operational efficiency and maximum profit,” the company says. The automated dispensers are available in three styles: counter-top, in-counter and mobile. They range from

one to six pouring nozzles and can be integrated into an existing draught system. The 425ml glasses are available in glass, plastic and disposable stadia cups. Bottoms Up says pub and bar owners can increase profits by up to 25 per cent through increased sales, reduced waste and advertising opportunities for the magnets. “The beauty of the system is that anyone can use it, no experience needed, meaning it can be set up anytime, anywhere and you’re in business within minutes,” Bottoms Up says. “When a server places a cup on the dispenser it fills and stops at the pre-programed level automatically. The servers’ hands are now free to grab a food order, ring up the sale, check ID, or set down more cups on other dispensers. This multiplies the amount of beer one person can dispense by themselves many times over, and in doing so, decreases transaction times.” Go to http://bottomsupqld.com/about.html ■

TC6644

Networkable Universal Controller • Australian Designed & Manufactured • BACnet Pre-programmed Universal Controller • Over 40 Pre-programmed Function Menu blocks available • Universal Power Supply: 18–265Vac/dc

CC-HV&R-011

For full specs and data sheet visit: www.regulatoraustralia.com.au

For all your HVAC product, design, installation and servicing needs: Call (02) 9804 6366 or visit www.regulatoraustralia.com.au

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MODULE

123

MANAGING NOISE IN DUCTWORK SYSTEMS

PROUDLY SPONSORED BY

In many air conditioning systems, ductwork is used to reticulate the conditioned air to and from the spaces to be served.

■ What?

The noise level requirements of the areas to be served can affect the layout of the ductwork, the size of the ducts and the extent of any noise treatment required. The capital cost of the ductwork, the running costs and the cost of providing space for the ductwork can all be affected as a consequence.

■ Who?

Because of the computational effort involved, the noise level requirements are often given scant attention.

Skills summary Noise in ductwork systems.

Graduate mechanical engineers, HVAC&R technicians, maintenance personnel, and practitioners involved in the design and/or day-to-day operations of HVAC&R systems.

Noise in ductwork systems Noise from the equipment, ducts, or air outlets is an important part of the comfort equation. The placement of equipment must consider the impact of equipment noise during operation and may involve consideration of noise and vibration. Adding bends and straight duct and reducing turbulence can reduce noise

This Skills Workshop looks at how noise is generated in ductwork systems and transmitted to the air conditioned or adjacent spaces. It also looks at strategies you can use to reduce ductwork noise.

Generation of noise in ducts

Noise in ductwork systems is generated by:

Noise in ductwork systems is often a very important aspect of ductwork design. Poorly executed designs can cause noise generation by the ductwork system, which may lead to complaints.

• Air terminals

• The fan • VAV boxes • Dampers and other fittings • Ducts. The noise passes down the ductwork system and enters the room, where the acoustical properties of the room determine the final noise level.

As air speed increases in duct systems, so does the noise level. Ducts are sized to maintain the maximum velocity of air without adding noise.

Noise and air velocity There is a direct relationship between duct air velocity and the noise generated by the airflow. All other things being equal, increasing air velocity causes more turbulence and more noise. Table 1 provides some guidelines on recommended maximum duct velocity for specific noise outcomes, but designers should always select and check appropriate duct sizes to suit the specific project’s noise criteria. The table is only applicable to systems greater than 1,000L/s and provides absolute maximum duct velocities, not recommended design velocities.

Adding bends and straight duct to reduce noise

Table 1 – Maximum duct velocities and noise effects Required NR level

Riser velocity (m/s)

Main supply duct velocity (m/s)

Branch duct velocity (m/s)

Run-out velocity (m/s)

Return duct velocity (m/s)

10.0

8.0

6.0

8.0

10.0

9.0

7.0

6.0

7.0

10.0

8.0

7.0

5.5

7.0

10.0

7.5

6.5

5.0

6.5

9.0

6.5

5.5

4.0

5.5

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HVAC&R Skills Workshop Noise from outlets The type of air outlet chosen and its placement in the space will have an impact on noise levels. Air that leaves an air outlet at a higher velocity than the outlet is intended to handle will create an undesirable whistling or hissing noise. Improperly placed or selected air outlets can also create drafts in the occupied zone, which is a comfort issue. When selecting an air outlet, consult the manufacturer’s performance data, which will list a comparative noise criteria (NC) rating

Medium-high frequency noise Medium-frequency and high-frequency noise tends to be easier to attenuate than low-frequency noise.

• Attenuation effect of fittings

Lined or double‑walled ducts can provide good attenuation.

• Fan selection to change fan noise

Lengthen duct runs if necessary (on the non-index run) to provide additional attenuation.

• Changing the acoustical properties of the room.

Silencers can be effective at attenuating specific targeted sound frequencies.

Silencers

Noise frequencies

Duct-mounted silencers can be very effective at attenuating airborne noise in ducts.

Low-frequency noise Low-frequency noise can break out of or break into a duct and be transferred with the airstream.

Silencers are generally designed and tested to provide a specific “Insertion loss”.

For rectangular ducts:

Pressure drops need to be considered, particularly on the index run.

• Use rectangular ducts where breakout noise is beneficial

Reactive silencers have low pressure drops.

• Do not use where break-in noise is a concern. Round ducts: • Do not allow as much breakout • Do not allow as much break-in.

• Inserting silencers

To avoid noise issues: • Start with quiet equipment • Locate air-handling equipment in less sensitive areas • Allow for proper fan outlet conditions • Address “system effect” • Use radiused elbows where possible • Larger ductwork reduces velocity and reduces generated noise

Dissipative silencers have no fill, they use baffles and chambers to attenuate noise.

• Avoid abrupt changes in layout

Controlling noise

• Provide flexible connections to equipment.

Noise is controlled in a variety of ways.

Acoustic liners:

• Changing the layout to introduce more bends or longer duct runs

• Thicker liner typically attenuates lower frequencies.

• Internally lining ductwork with acoustic absorbing insulation (bare ducts provide limited attenuation)

More mass in the duct walls is better at attenuating lower frequencies.

• Increasing duct size will reduce air velocity and noise

• Place dampers away from outlets

There are various calculations involved in determining noise levels from a ductwork system. These calculations are complex and invariably require the use of a computer program. Further information can be found in the AIRAH DA03 Ductwork for Air Conditioning manual.

Table 2 – Comparative NC values Communication environment

<NC25

Extremely quiet environment; suppressed speech is quite audible; suitable for acute pickup of all sounds.

Broadcasting studios, concert halls, music rooms.

NC 30

Very quiet office; suitable for large conferences; telephone use satisfactory.

Residences, theatres, libraries, executive offices, director’s rooms.

NC 35

Quiet office; satisfactory for conference at a 5m table; normal voice 3 to 10m; telephone use satisfactory.

Private offices, schools, hotel guestrooms, courtrooms, churches,hospital rooms.

NC 40

Satisfactory for conference at a 2 to 3m table; telephone use satisfactory.

General office, labs, dining rooms.

NC 45

Satisfactory for conference at a 11/2 to 2m table; normal voice 1 to 2m, raised voice 2 to 4m; telephone use occasionally difficult.

Retail stores, cafeterias, lobby areas, large drafting and engineering offices, reception areas.

Unsatisfactory for conferences of more than 2 or 3 persons; normal voice 300mm to 600mm, raised voice 1 to 2m; telephone use slightly difficult.

Computer rooms, stenographic pools, print machine rooms, process areas.

>NC 50

Typical occupancy

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HVAC&R Skills Workshop Designing ductwork to minimise noise regeneration

Branch takeoffs Radius or bevel branch takeoffs are preferable to Y or straight takeoffs. See figure 3.

Maintain the air velocity in the duct as low as practicable. The design of fittings can have a significant impact on system resistance and fan operating energy requirement. Providing low pressure drop and laminar flows across ducts and fittings will minimise the potential for regenerated noise.

NOISIEST

BETTER

Elbows

QUIETEST

½D

Use long radius elbows with full radius turning vanes for maximum noise reductions.

Figure 3 – Guidelines for minimising regenerated noise in takeoffs.

Tees Keep airflows as laminar as possible, use turning vanes at all diverging T connections.

NOISIEST

BETTER

QUIETEST

Turning vanes

Figure 1 No vanes to direct the airflow

Long radius elbows without vanes and square elbows with short vanes are satisfactory for most applications.

BETTER

Dual radius split

Figure 4 – Guidelines for minimising regenerated noise in duct tees.

Square elbows without vanes should be avoided. See figure 2.

NOISIEST

Two square elbows back-to-back

QUIETEST D

Offsets Avoid using Z-offsets without turning vanes.

Gradual offsets (15° maximum) are preferable to Z-offsets with turning vanes. See figure 5.

½ D

Square

Long Radius*

Square with Long Trailing Edge Vanes**

Long Radius with Vanes

NOISIEST

BETTER

QUIETEST

15° Max.

Square with Short Vanes* 7.5° Max.

* Airflow velocity and proximity of upstream and downstream fittings and fans determine which type is preferable. ** Trailing edge length should be at least 3 times the vane spacing.

Figure 2 – Guidelines for minimising regenerated noise in elbows.

15° Max.

Figure 5 – Guidelines for minimising regenerated noise in transitions and offsets.

This month’s Skills Workshop has been adapted from AIRAH’s Professional Certificate in HVAC&R Fundamentals, an online training course designed to fast-track HVAC&R technical knowledge and skills. Go to www.airah.org.au/PCHVAC_R

PROUDLY SPONSORED BY

Next month: Controls fundamentals July–August 2019

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Safety Matters

FLUID RESPONSE Spill management is crucial for any workplace storing or using liquids that could pose a threat to humans or the environment. And that’s certainly true for HVAC&R. Businesses are legally required to protect employees, others and the environment. In the case of hazardous liquids, this means ensuring that a spill risk assessment has been conducted and there is a spill containment strategy – including spill response plan – in place. Liquids this may apply to include, but are not limited to: • Hazardous chemicals, such as toxic substances, carcinogens, and agricultural and industrial chemicals (for example, coil cleaning fluid) • Fuels, petrols and other flammable liquids • Polluted water, such as runoff or stormwater containing surface chemicals • Chemical waste. A workplace spill risk assessment lists information such as chemical types, quantities, locations and possible reactions. It also details administrative and engineering controls that can minimise the risk of a spill. A common type of engineering control is the use of secondary containment facilities, such as spill decks and bladder systems. These automatically contain a spill if a leak occurs and are recommended as part of a spill containment strategy.

ACCIDENT ZONE No matter how much work you put into preventing or minimising spills, it’s impossible to completely eliminate the risk. That’s why you also need a spill response plan. The spill containment guide from Pratt Safety Systems recommends a nine-step workplace spill response plan, as follows: • Assess the risk • Identify the type and source of spilled chemical • Protect yourself with appropriate PPE

MOPPING UP A significant part of the plan involves choosing an appropriate spill kit and using its contents to contain and clean up the spill.

It’s vital that workplaces have the right type of kits for all possible spill risks, and that workers are familiar with the plan for using them. ■

Such kits include absorbent materials, such as booms, pads, pillows and floor sweeps, and other accessories, such as contaminated waste bags, personal protective equipment (PPE) for workers, nitrile chemical gloves, barricade tape and safety information tags.

No matter how much work you put into preventing

There are different spill kits for different types of liquid spills, based on the type of absorbent materials used. They also come in different sizes and absorption capacities. The kits must be able to absorb the maximum likely spill that could occur in a workplace. A spill identification chart can simplify the process of choosing a spill kit in an emergency.

or minimising spills, it’s impossible to completely eliminate the risk

• Contain the spill • Control the source • Clean up the spill • Dispose of used absorbents and chemicals • Decontaminate all tools • Restock any materials.

The Spill Containment Guide published by Pratt Safety Systems contains general information on spill containment as well as instructions for developing a spill containment strategy and more details on spill kits. It also explains when a spill containment strategy should be in place, why it is important, the costs to businesses, and which authorities should be informed when a spill occurs. Go to blog.prochoice.com.au/pratt-spill July–August 2019

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Cover Feature

SNAKES ON A DRAIN! Reptiles, insects, rats, birds and the occasional larger visitor – Aussie HVAC&R technicians never know what they’ll find when they’re called out for a service. Australia is a place of amazing wildlife. And whether for warmth, shelter, water, food or other reasons, that wildlife is often found in HVAC&R equipment and systems around the country. According to the Victorian Department of Environment, Land, Water and Planning (DELWP), any wildlife that lives in hollows or holes may consider HVAC systems a suitable alternative. That includes possums, reptiles, native rodents and insects – as well as vermin such as rats, mice, pigeons and even feral animals. With winter now biting in the southern states, many technicians servicing the residential market will be coming across heating systems that have not been turned on for months. Some will have become home to a range of animals and pests.

I’ve also come across two possum skeletons Skeletal remains in a compressor wrap.

and over 30 mummified

Source: Richard from SA

rats in suburban areas 20

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Cover Feature

YARNS FROM THE FIELD

Smaller creatures like this gecko commonly cause PCB problems. Source: Jenny Smith, Affil.AIRAH

HOSE OR SNAKE? The patterns of some snakes look very similar to common HVAC&R components such as braided nylon sleeving – it can be hard to see them until they start moving. “We were replacing a domestic ducted system, and as we were opening the condenser up to disconnect the pipes and cables, we discovered the snake wrapped around the condenser,” says Tom Conlan of Temperature Control CC on NSW’s Central Coast. “We figured out the snake had pretty much nested in the condensing unit, and had probably done so for some time as there were plenty of dead animal carcasses and the smell was awful. “We moved the unit further away from our workspace and let the snake remove itself from the unit.”

This is the experience of Jason Williams, owner of Perfect Temperature Heating and Cooling based in Clyde North in Melbourne’s south-east. “In the last month I had to replace a ducted system because mice had ruined the boards, and found a possum living in a heater duct,” Williams says. “I’ve also come across two possum skeletons and over 30 mummified rats in suburban areas including Glen Waverley, Upper Beaconsfield, Blackburn and Wheelers Hill.”

Snakes are misunderstood by many … they play a pivotal role within the environment

And they aren’t only found on the east coast. Allen Gregory has worked in the Pilbara region of Western Australia for almost a decade and has seen his fair share of snakes (or at least their remnants) when servicing air conditioning equipment. “I’ve found quite large snake skins behind indoor units of wall split air conditioners,” Gregory says. “They chase frogs, rats and mice up the condensate drains, or are attracted to the heat sources.” As well as snakes, Gregory often finds frogs that have “fried themselves” on the mains power supply or occasionally taken out the printed circuit boards (PCBs).

In many cases, pests will chew their way into the plastic-sleeved ductwork of residential heating systems. But they will also take advantage of existing holes and poor or deteriorating connections.

“You find dried out frogs in all sorts of weird poses.”

Equally, in warmer parts of the nation, very different kinds of fauna find their way into HVAC&R equipment and will be discovered throughout the year. We invited fridgies from around the country to tell us about their close encounters with all creatures great and small.

Python found while replacing domestic ducted system. Source: Tim Conlan, Temperature Control CC.

As well as removing snakes from commercial systems, McKenzie has been called out to people’s homes. “We have been called out to a few snakes hiding in reverse-cycle, split-system air conditioners on walls. Most of the time they end up going back into the wall through the hole created by the piping.” Brushtail possum found in heating duct (see page 23). Source: Jason Williams, Perfect Temperature Heating and Cooling.

THE ANTS GO MARCHING Insects also pose a problem in the Pilbara. Gregory says Singapore ants are attracted to the electronics in split systems and are “good at bridging out connections on PCBs and frying the boards”.

He says because of this, it’s almost impossible to make snake-proof systems. Small snakes can fit into the smallest gaps, and will find a way in if they want to.”

Ants can render a new unit unusable in no time at all,

SLIPPERY SITUATIONS

if not controlled

In the northern states, possums as well as vermin like rats and mice are also common – as are their predators.

It’s a similar story on the other side of the country too.

According to Stuart McKenzie, owner of the The Snake Catcher 24/7 on Queensland’s Sunshine Coast, snakes are often discovered in HVAC&R systems.

Working for Alpine Refrigeration, a specialist refrigeration and air conditioning company on the Darling Downs in south-east Queensland, Brendon McEwan says it is common to find all kinds of pests and animals affecting the operation of RAC systems.

“On several occasions we have been called out to catch snakes hiding within air conditioning units or heaters and their components,” McKenzie says. “Usually it is the tree snakes and pythons that shelter in these units, as they can offer a nice warm spot for snakes to hide. “Snakes are misunderstood by many, but hopefully with time that will change. They play a pivotal role within the environment and without them ecosystems simply wouldn’t function as well.”

This includes ants, which he believes are attracted to the electronic hum of a PCB. “Ants can render a new unit unusable in no time at all, if not controlled,” McEwan says. Brown tree snake found during regular maintenance. Source: Brendon McEwan, Alpine Refrigeration.

He says ant and wasp nests are commonly found on coils. These reduce the surface area and lower the refrigeration effect. The system must then

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Cover Feature

YARNS FROM THE FIELD THE WHIRLWIND RAT

REMOVING THE STENCH

hatches are tight, and that access points are correctly functioning, can be closed and remain closed especially when systems are under pressure.”

Occupants often aren’t aware of pests or animals within an HVAC&R system until performance is affected or unusual smells start wafting out.

If the system is in the roof space, possums can be a risk. But again, there are steps you can take.

Rats and mice are commonly found in and around HVAC&R systems, but one particularly large rodent met an unfortunate death.

“Odours are probably most clients’ biggest worry with comfort cooling systems, as this affects their level of comfort and could also impact their day-to-day trade,” says McEwan.

“I once found a big rat that had been caught in the barrel fan of an under-ceiling split system,” says Allen Gregory.

In his experience, once an odour has entered a consumer’s air conditioning system, it’s hard to convince them it will ever dissipate.

“The poor thing must have been running on it having a great time until it started! It latched onto the inside of the fan and I think the centrifugal force and shock killed it. It wouldn’t let go and threw the balance of the fan out so much that the unit was nearly shaking itself free from the ceiling.

“It needs the source of the odour – usually a dead animal – to be removed. But it might also require the ducting to be replaced if it is the flexible type. In some cases, the local council or EPA might need to be involved due to the bacteria that can be present at different stages of decomposition.” As experts in HVAC&R hygiene, corrosion and indoor air quality solutions, Aeris Environmental and its national network of partners are often called on to treat odours and lingering microbial issues.

“When I found him, he was latched onto the inside of the barrel fan with all four claws. Most of its insides had exited its rear end.

According to Scott Gregson, national business development manager for Aeris Environmental, it doesn’t need to be the result of a deceased animal or infestation to cause a problem.

“It wasn’t the start to the day I had hoped for. Nor him I imagine!”

work harder, placing pressure on components and ultimately causing catastrophic failure.

“If you have an animal that defecates or urinates in the unit or duct, or is trapped and dies there, the remains start to decay,” he says. “And you would very quickly have microbial and bacterial issues to deal with.

Eight-legged creatures also cause problems on the Downs. Spiders love to create a home in and around package units and smaller condensing units. “Spiders are all too common,” McEwan says. “But twisting spider webs on a cobweb brush or screwdriver like fairy floss can be somewhat satisfying.” While he has come across his fair share of feral animals, possums and rats, McEwan says one of the biggest pest problems on the Downs is created by Columbidae – otherwise known as pigeons. “Columbidae can overrun a site in no time if left alone,” he says. “Bird control needs to be put in place, even low‑voltage bird control systems. And excrement clean-up is necessary to stop the acid corroding the system.”

“These can find their way into the airstream or drain network of plant and equipment, resulting in a much more complex remediation process aside from just the removal of the animal.” If a technician encounters the remnants of an animal or infestation within a HVAC&R system, Gregson says they should quickly identify the areas within the system that are contaminated. Appropriate remediation and cleaning specific to the type of contamination should then be carried out. “A specialist HVAC hygiene maintenance and remediation company should be consulted,” he says. There are a number of processes that can return the equipment and system to good working order. These include HEPA vacuuming of surfaces; sanitisation of all surfaces; drying of all surfaces; treatment of affected surfaces; and assessment of surfaces and air sampling in the surrounding areas to ensure effective remediation has occurred. “But prevention is better than the cure,” says Gregson.

ACCESS ALL AREAS So, how do you stop animals getting in? The bad news is that nature typically finds a way. However, it’s still worth taking preventative measures. Animal-resistant guards and mesh are options. You can also seal wall penetrations to prevent ingress, or use surface spray. We’ve even heard that the common moth ball is an effective deterrent for some species. According to Gregson, access can be prevented with vermin grates and mesh on external entries of ductwork or openings in plantrooms. “Also, technicians should ensure that all seals on doors and access

Columbidae infestation of plantroom. Source: Brendon McEwan, Alpine Refrigeration.

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“All tree branches that lead to the roof should be pruned, with a gap of at least 1.5m,” says a DEWLP spokesperson. “Possums can jump a long way down but can’t jump far across. “Brushtail possums and other wildlife can also gain access to the roof space through loose roof tiles or roofing iron, broken eaves and holes in timber and brickwork, so these should be repaired.” If a possum is suspected to be living in the roof, watch where the possum emerged from and block off these access points. A one-way flap that allows the possum to leave but not return is a simple and humane way of restricting access. A fact sheet about management methods for brushtail possums living in roofs and gardens is available from www.wildlife.vic.gov.au

WE’VE GOT A LIVE ONE! Finding animal damage is one thing, but what should you do if the creature is still alive and inside the system? In Victoria, all wildlife is protected under the Wildlife Act 1975. Similar laws also exist in other states and territories. This law states that it is illegal to destroy protected wildlife without authorisation from the Department of Environment, Land, Water and Planning (DELWP). Severe penalties apply. If a technician encounters wildlife of any sort onsite, the DELWP says the animal should be removed and released on the same property.

YARNS FROM THE FIELD FERAL PERIL It’s not just native fauna that can find their way into HVAC&R systems. Feral animals are also a potential problem, as this experience in the Darling Downs demonstrates. “My most disturbing find, to date, would be when I visited a client west of the Downs who said his refrigeration unit on the roof was making a loud ticking noise,” says Brendon McEwan of Alpine Refrigeration. “When I got there, I found a large black feral cat had curled up against the condenser overnight for warmth. When the coolroom had called for cooling, the compressor would have fired up along with the fan and the cat had no chance of making it out.” “Every turn of the blade made its mark and eventually pushed the feline back up against the condenser, continuing to skin it. I had to remove the belts and adjust the motor back to remove the obstruction.”

Cover Feature

YARNS FROM THE FIELD DERELICT IN THE DUCT Brushtail possums have developed a reputation for finding their way into homes, particularly as the weather cools and fewer suitable trees are available to them.

Carpet python found during chiller start-up after shutdown period. Source: Brendon McEwan, Alpine Refrigeration.

“Licensed wildlife controllers can assist with the removal of certain wildlife species, including reptiles and brushtail possums.” Different states have regulations around the removal of fauna. For example, Common brushtail possums living in buildings in Victoria can only be trapped if they are to be released on the same property, within 50m of the capture site, or taken to a registered veterinarian for euthanasia. “Possums may only be trapped using traps that will not cause injury, and must be released on the same property,” says the Department spokesperson. “Humane traps are available from many local councils.”

If injured wildlife is found, a licenced wildlife shelter operator or foster carer should be contacted. Last year, the Victorian government launched the Help for Injured Wildlife online tool to make it easier to find help for injured wildlife anywhere in Victoria. The new tool provides information about wildlife rehabilitators, rescue organisations and veterinarians in the local area who can help and care for the animal, such as a possum, koala or snake. Go to www.wildlife.vic.gov.au/injured-native-wildlife/ help-for-injured-wildlife ■

“I’d gone to the site as the customer had reported poor airflow in their ducted heating system,” says Jason Williams of Perfect Temperature Heating and Cooling. “Upon inspection, I found a massive hole where something had chewed through the plastic sleeved duct. I quoted the fix and returned a couple of days later, but upon completion we still had no airflow to the bedroom.” “I sent my guy under and he could see a sag in the 150mm duct. Assuming something was in there, he blocked it from entering the rest of the system, while I dropped the boot. But not before a sneaky photo!” “Once the boot dropped, the possum high‑tailed it out of there.”

GRIPPERFIX

™

Roof-mounted utilities, such as split system condensing units, duct supports, communication equipment and service walkways can support a building envelope or compromise it. The S-5! GRIPPERFIX system, with S-5! clamps and brackets are The Right Way™ to mount to any metal roof using our lifetime “double-seal” performance – or no roof penetration at all. GRIPPERFIX is quick and simple to install, preserves warranties and lasts as long as the roof itself. Don’t leave it to chance: Fix it, so it never needs “fixing.” S-5! affordable mounting products ensure roof integrity preserved from corrosion, leaks, rust, or algae. Done once – the right way – It’s a ripper!

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TAFE news

SMILEYS FOR STUDENTS For air conditioning training, there are wall-mounted splits and ducted air conditioning systems that are part of a branch control system. Rather than installing a ceiling, the equipment has been left exposed so the students can simply look up to reference the equipment they are discussing in class.

As reported in the June issue of HVAC&R Nation, the Victorian government recently granted almost $2 million towards projects put forward by GOTAFE, Bendigo Kangan Institute and industry representatives CA Group Services.

TAFE Queensland refrigeration teacher Clayton Milford says the new facilities are already making a huge difference.

Meanwhile, in other parts of the country, two other projects have already come to fruition.

“Having the new area up there plus the coldrooms gives us greater scope for teaching pracs that are relevant to what the guys do out in the field,” he says.

HIGH-TECH TEACHING TAFE Queensland has opened a new high-tech training hub at its Ashmore campus. The fit-out, which cost $1.5 million, boasts state-of-the-art equipment and will benefit more than 1,200 electrical and air conditioning and refrigeration students. The hub has eight coldrooms, including two with freezer room options. There is a practical workshop area, a hybrid practical and theory room, and a space dedicated to the delivery of data communications technology. It also has 36 live wiring bays, allowing students to complete their practical wiring assessment in an electrically safe environment.

AIMING FOR EXCELLENCE Down south, a new HVAC Centre of Excellence at Holmesglen’s Chadstone campus was officially launched by Victorian Skills Commissioner Neil Coulson on May 28. The facility is a collaborative partnership between Holmesglen and the Air Conditioning and Mechanical Contractors’ Association (AMCA). It offers applied learning in HVAC and features cutting-edge equipment and technology.

Apprentices at two TAFE campuses are enjoying access to new, top-of-the line training facilities. In recent months we’ve seen encouraging signs of investment in TAFE training facilities for refrigeration and air conditioning apprentices.

“It’s quite difficult to get them disengaged now! So they’re really enjoying everything.”

“And you can imagine, you get halfway through a conversation about the theory, and in 10 steps you’ve got examples of it ready to go. It’s great because the students can get their hands on and start having a bit of a play.” The only issue Milford has identified is that some classes are running overtime. “I’ll get second- and third-years up there, and it’ll be a case of, ‘OK boys, it’s lunchtime, so five minutes, let’s pack up.’ And then I’ll be back in five minutes – ‘Come on boys, let’s make things safe, we’ve got to get out the door.’

The purpose-fit, modern facility has been designed to upskill existing climate control technicians and train future mechanical services professionals, both in Australia and internationally. The AMCA says the centre will provide leadership across the vocational education and training sector and drive mechanical services training in Victoria. In his speech, Coulson acknowledged the importance of collaboration between education providers and industry to secure a prosperous future for trades. “As the Victorian Skills Commissioner, my role is to work with industry stakeholders and government to better align training with the needs of Victorian industry and the economy,” he said. “As I see it, genuine collaboration between training providers and industry – based on industry intelligence and exchange of ideas – is the key to achieving this alignment. “I see this centre as an example of doing it right. It is an arrangement that effectively leverages the expertise and mission of each of the parties. “Your collaboration will be a powerful force in future‑proofing the heating ventilation and air conditioning industry. And it is an example to which other industries can aspire.” ■

The launch of the Holmesglen facility was attended by around 100 guests from the HVAC and associated industries. Source: Holmesglen TAFE.

Fourth-year apprentice Aaron Brewer at Ashmore TAFE’s new training hub. 24

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Source: TAFE Queensland

Enrolments at the Ashmore campus are up by more than 200 compared to last year. Source: TAFE Queensland.

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WESTERN AUSTRALIA & NORTHERN TERRITORY Osborne Park (08) 9445 9902 Jandakot (08) 9417 5200 VICTORIA & TASMANIA Ballarat +61 3 5332 0140 Clayton +61 3 9574 7188Geelong +61 3 5223 3344 QUEENSLAND Maroochydore (07) 5443 7630 Southport (07) 5591 2523 Mackay +61 7 4957 5888 SOUTH AUSTRALIA Clovelly Park 0409 225 773 NEW SOUTH WALES & ACT Chester Hill +61 2 9743 7911 Wollongong +61 2 4226 5133 Wickham +61 2 4969 0888 East Maitland +61 2 4933 5388 Warners Bay +61 2 4953 6092 (1) Source Euromonitor International Limited; Consumer Appliances 2017ed, % unit share, 2016 data. Major Appliances category is the sum of dishwashers, home laundry appliances, large cooking appliances, microwaves and refrigeration appliances.t

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Around the Nation 1

Zane Barron, Daniel Caruso, Jeremy Needham and Raja Gounder (L to R).

1 CHANGES IN THE PIPELINE?

performance, which resulted in a fourth consecutive record-breaking financial year. “The business continues to grow with the company expecting to reach $400 million in sales in the next few years,” he said.

As this issue of HVAC&R Nation went to print, the Victorian government was considering a proposal for mechanical services plumbers to install and service multi-head air conditioning systems.

The award winners were Fresh Air Australia (Room Air Conditioners), Adelaide Instant Air (Mr Slim Light Commercial/Commercial Package Air Conditioners – pictured), and Navaska (City Multi VRF Commercial Air Conditioning).

Last year, the Department of Environment, Land Water and Planning (DELWP) reviewed and revised regulations on plumbing work. Following the review, a series of projects were established to further examine different aspects of the regulations. One such project was reviewing the regulation of multi-head split systems.

Go to www.mitsubishielectric.com.au ■

3 REGIONAL RECCIE

Some stakeholders have claimed that mechanical services practitioners routinely install multi-head split systems. In response, the government is examining options for changing the regulations. One proposal is for a minor amendment that would allow mechanical services practitioners to carry out specific aspects of the installation of multi-head split systems, for example, the installation of pipework. Stakeholders have argued that because this is already a routine aspect of mechanical services work, no additional practitioner training would be required.

In the past six months, engagement officers from the Australian Refrigeration Council (ARC) have visited regional and remote locations to perform permit holder and education visits. Visits were made to Darwin and surrounding areas (81 visits); to Toowoomba and surrounding areas in Queensland (71 visits); to Coffs Harbour and surrounding areas in New South Wales (71 visits); and to Launceston and surrounding areas in Tasmania (72 visits – all to permit holders).

If approved, it would allow holders of a Certificate II in Split Air-Conditioning and Heat Pump Systems to perform work currently restricted to Certificate III‑qualified technicians. ■

The visits covered industry sectors including stationary, split system, automotive, wholesalers, refrigeration and air conditioning end-of-life businesses, training organisations.

2 AN ELECTRIC EVENING

According to the ARC, there were three main areas of non-compliance. First, refrigerant handling licence holders were not working to the automotive code of practice. Second, refrigerant trading authorisation (RTA) holders did not keep up-to-date records of refrigerant purchased, sold and recovered. And finally, businesses did not display their RTA number on advertising.

In June, Mitsubishi Electric held its annual awards night to applaud top performing dealers from around Australia. More than 300 people attended the event, held at Sydney’s Shangri-La Hotel. Guests included Mitsubishi Electric specialists, dealers and VIPs from Japan. Mike Whitney was the host, and further entertainment was provided by comedian Cal Wilson, ABBA tribute group Björn Again, and keynote speaker Glenn McGrath.

In the coming months, the ARC is planning to visit the Goldfields, south and mid-west, the Great Southern region and north-west Western Australia; Morisset and Gosford in NSW; Mildura, Ballarat, Mansfield and Geelong in Victoria; and Mackay, Bundaberg and Toowoomba in Queensland.

Mitsubishi Electric Australia’s managing director, Jeremy Needham, acknowledged the company’s 26

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Go to www.arctick.org ■ |

July–August 2019

4 TRUE BLUE TRAFALGAR Fire containment expert Trafalgar recently obtained Australian Made certification for a number of its products. The renowned green and gold stamp has been awarded to the Patented Fyrebox SlabMounted, a fire-stopping device that eliminates many compliance issues commonly seen in multi‑residential constructions. The Fyrebox Cast‑In and Fyrebox Maxi from the Firebox family have also received Australian Made certification. Trafalgar’s full range of dangerous goods cabinets have been certified. The cabinets, featuring a patented door-controlling mechanism that allows the right door to stay open while the left door is open, eliminate the dangerous practice of propping doors open. The Store-Safe iconic yellow site box has been certified too, as have the vehicle box and ute box from the safe custody storage boxes range. “Made in Australia has been an important part of Trafalgar’s heritage since the brand was established in 1945,” says the company. “It was founded on the ethos that there is no better way to control quality, reduce lead times and improve service than to make it in your own backyard.” Call 1800 888 714 or email sales@tfire.com.au ■

5 KIRBY APPRENTICE FUND To celebrate World Refrigeration Day on June 26, Kirby announced its new Apprentice Fund. The initiative has been established to support apprentices and strengthen the technical skills of the HVAC&R industry. Kirby plans to to raise funds through various programs and use those funds to provide trade tools and skills development training to industry apprentices. On World Refrigeration Day, all supporters had the chance to purchase a Kirby T-shirt for $10 from a Kirby branch, with all profits directed to the Kirby Apprentice Fund. The trade T-shirts carried the message: “strengthening our trade”.

Around the Nation 6

Adam Stingemore (Standards Australia, left) and Jeroen Prinsen (Techstreet).

Going forwards, Kirby account customers can contribute a voluntary refrigerant levy to the fund, which will also be fully invested back into the industry for the provision of tools and training. While the Kirby Apprentice Fund was launched on World Refrigeration Day, the company plans to continue and expand the fund and fund-raising programs into the future. To maximise opportunities from the fund, all HVAC&R trade apprentices are encouraged to register their details at kirbyhvacr.com.au ■

6 A NATIONAL FIRST Mitsubishi Heavy Industries Air-Conditioners Australian (MHIAA) and Superior Training Centre ran the first Australian course on A2/A2L refrigerants in June. Pushed along by the HFC phase-down, manufacturers have been rapidly switching their split system air conditioning units from R410a (with a GWP of 2,088) to R32 (GWP 675). Despite the increased presence of this refrigerant, however, many technicians still lack specific training in handling R32. It differs from R410A in that it operates at higher pressures and is also classed as an A2L (mildly flammable) gas. Last year, a unit of competency for training in A2/A2L refrigerants was officially endorsed. And MHIAA offered the training for the first time in Australia at its Regents Park headquarters. The course was delivered by Superior Training Centre’s Peter McQueen (BTech) and covered: theoretical training in A2L refrigerants; practical training in refrigerant recovery; pressure testing and leak testing; and evacuation and recharge training. ■

replacing it with Reliable Control’s Mach system. The GPT Group was already comfortable with the product, after EA achieved good results in Quads 1, 2 and 3, and was therefore happy to expand the portfolio and use of Reliable Controls.

of used contaminated and unwanted refrigerant. This equates to more than 10 million tonnes of stratospheric ozone being saved from destruction, and more than 14 million tonnes of CO2 equivalent being prevented from emission.

As part of the same project, metering will be added to Quads 1 and 4, in line with GPT’s vision of improving the NABERS energy rating, currently sitting at five stars.

Farrelley has been affiliated with RRA since 2008 as an industry representative and was appointed to the Board of Directors in 2016. She also worked for almost 20 years at one of the world’s largest chemical producers, Arkema, giving her a wider understanding of the refrigerant life-cycle.

“We look forward to a successful project,” says GPT. “Quads 1, 2 and 3 were a success – let’s make it four out of four!”

Standards Australia has entered into an agreement with Techstreet to distribute its content.

“I really want to talk about the RRA program and make sure everyone’s across it,” says Farrelley. “We know it’s a legal requirement, but because there’s no enforcement on recovery, make sure that people are aware of it and know that they’re doing a good thing for the environment. There’s real and measurable outcomes for that. They can also make money out of reclaimed refrigerant.” ■

Earlier this year, Standards Australia announced it was looking to expand its options for distributing content, after a court ruled that SAI Global would no longer have exclusive rights.

10 AUSSIE INGENUITY

Go to environmentalautomation.aragroup.com.au ■

8 STREETS AHEAD FOR STANDARDS

Techstreet positions itself as a “technical information superstore” and offers instant access to over 500,000 industry codes and standards from around the world. These include ISO and ASHRAE codes and standards. Under the new agreement, Techstreet will become an additional distributor of Standards Australia’s content, including Australian standards and other technical documents (such as ISO and IEC materials). Users will be able to access Standards Australia content through a new webstore and through a subscription service to Techstreet Enterprise, Techstreet’s standards management platform.

The History Channel is running a new series called Aussie Inventions That Changed The World. “Historically, Australia has punched well above its weight on the world stage of timely innovations, scientific breakthroughs, and cleverly designed new technologies,” say the creators. “Throughout its history this continent has produced an impressive line-up of tenacious inventors, each envisaging a better way of doing things by finding material answers to the problems of their time, often in the face of enormous resistance. Their work has forever changed the way we live, both in Australia and around the world.” Along with the usual heroes – the Hills hoist, bionic ear, pacemaker and wifi – there is a guernsey for the godfather of refrigeration, James Harrisson, who built an ice maker in 1851. His episode will screen on July 29.

7 FOR STRONGER QUADS …

9 KYLIE TAKES CHARGE

Environmental Automation (EA) has secured the project to upgrade and replace the BMS at Quad 4 – Sydney Olympic Park.

Refrigerant Reclaim Australia (RRA) recently announced Kylie Farrelley as its new general manager, replacing Michael Bennett.

The project will involve removing the existing 10‑year‑old building automation system and

Since RRA was founded in 1993, the industry-funded not-for-profit has taken back more than 7,000 tonnes

“What’s really exciting about this series is that it will remind Australians that, at our best, we are a progressive, innovative country,” says host Matt Parkinson. “We thrive on challenges and these invention stories are all about people who backed themselves against the odds.” ■

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Green Wedge

TOGETHER IN

ELECTRIC DREAMS Bollinger Motors in the US has designed an all‑electric 4WD truck from the ground up. Robert Bollinger grew up drawing cars and dreaming of owning his own car company.

The end result is the perfect truck for the toughest work and play anywhere on Earth.”

And though The Simpsons has shown us that doesn’t always work out for the best, it looks like Bollinger might be on to a good thing with his all-electric 4x4 B1 and B2, a jeep and sports utility pickup, respectively – and nothing to do with bananas or PJs. These vehicles have been designed from scratch.

Both models feature hydropneumatic suspension, in wheel portal gear hubs, and 120kWh battery packs. The trucks’ classic styling is deliberate – a futuristic look could soon appear dated.

We’re electric, we’re low‑volume,

“I want to have one vehicle that we make for many years,” Bollinger says. “Classic is always better.”

so we’re not going to be cheap

“We’ve created a new platform of electric trucks capable of exceptional off-road performance, combined with never-before-seen utility features,” the company says. “Our all-electric, dual-motor drivetrain creates best-in-class horsepower and torque, all-wheel drive, 50/50 weight distribution, unbeatable traction, and best-in-class ground clearance.

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So how much will it set you back to go electric? Well, that’s something of a mystery. “We’re electric, we’re low-volume, we’re basically handbuilt, so we’re not going to be cheap,” Bollinger says. “When we come out with our price point there will be some people who think we’re a $200,000 vehicle,

July–August 2019

we’re basically hand-built,

who will be pleasantly surprised. There are some people who want it to be a Jeep Wrangler-type vehicle, but there’s no way that’ll happen.” The trucks are due to go into production later this year, and will compete with the Tesla Pickup Truck for market share. ■

Smoko with . . .

Name: Chris Watts

l Refrigeration Company: Chilli Commercia mechanic and electrician Occupation: Refrigeration ut working in the HVAC&R What’s the best thing abo people nt places, meeting different industry? Working in differe call vice ser t nex the at wh ere or and never knowing when, wh t’s for sure. will be. It’s never boring, tha d in the industry? How long have you worke -age apprenticeship as a mature About eight years. I did an for y d for another compan student in my late 20s, worke third year working for myself. my into few years, and now I’m top rewdriver. It’s always in my Favourite tool: My mini-sc rk. wo ny things in service pocket. It’s great for so ma ’ve ever received: Best on-the-job advice you e. Duk Don’t overthink it! Thanks do HVAC&R industry, what If you didn’t work in the bably pro I’d doing? Not sure, but you think you would be be surfing heaps more. ’ve ever worked on: Most challenging job you w. when you’re a one-man sho g gin llen Most installs are cha

car taking me and Dream car: I dream of my d trip. So one roa nth mo my family on a sixwould be ideal. hen kitc a and s with a few bed Dream holiday: See above. Drink of choice: Balter XPA

the way to What did you listen to on ting old. get I’m . work today? ABC 702 nt: A few new For my next birthday I wa in them. es T‑shirts. All mine have hol : Favourite quote or saying B. net pla no re’s The Trail mix. Favourite smoko snack: ng. goi Nuts and raisins keep me

k Fanning. Sporting hero: Probably Mic guy. He seems genuine and a nice r. bee to goPlus, he developed my … When I’m not working I’m ting get or Hanging with the family, . nce cha a in the water if I get

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The Lighter Side This month’s Lighter Side brought to you by:

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1 WINNER

3 1 AIR CON JENGA

Special mention for the stack on top of the condenser, which looks like a weak attempt to seal the window. Thanks to James in Alice Springs for the great photos. ■

2 NO EXIT

Daniel in Queensland spotted this coolroom conversion at a local bottle shop. “Won’t be using this door anymore,” he notes. ■

3 COIL CALAMITY

“The customer said it wasn’t working very well,” reports regular Lighter Side contributor Jesse St John. “And the filter was more blocked than the coil!” ■

4 TECH ON A HOT TIN ROOF

Nathan in Padbury, WA, found these cables unprotected in the open on a tin roof. ■

5 POWER UP

“This one puts a whole new meaning to the term PTO,” says Martin. “At some stage a sparky has fitted a power point feeding off the condenser supply.” ■

HAVE YOU COME ACROSS SOMETHING SCARY, UGLY OR JUST PLAIN FUNNY? If your entry is deemed the monthly winner, a 700ml bottle of Jim Beam will be on its way to your door. Please include a postal address with your entry. Entrants must be 18 or over. Send your hi-res (>500KB) photos to Editor, Mark Vender at mark.vender@airah.org.au

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