HVAC&R Nation July 2018 by AIRAH

Skills WORKSHOP

Fan performance

Cool chicks

Top fan technology for poultry farmers

Tough lessons Avoiding common pitfalls

July 2018 / ISSUE 113â&#x20AC;&#x192;

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2 | HVAC&R Nation | www.airah.org.au/nation | July 2018

July 2018 / ISSUE 113

Tough lessons 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

www.airah.org.au/nation

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 Sean McGowan

Experienced technicians and engineers tell us about some of the most common HVAC&R pitfalls – and how to avoid them.

Advertising sales

HVAC&R Nation regulars

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

The Toolshed

Skills Workshop 15

See what’s new in the ‘Shed

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

8 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.

Fan performance

Exclusive to July

Cool Tech Attention 80s gamers – Atari is back!

Green Wedge We look at a revolving door that generates electricity

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. 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.

19 Legal Speak Managing customer complaints while getting paid

ARBS wrap Highlights from the jamboree of AC

26 Around the Nation Who’s in the news?

28 Smoko with . . . Q&A with Paul Dixon

29 AIRAH Classifieds

Cool chicks We’re always keen to highlight how HVAC&R plays a part in our world, and this month we look at the vital role of EC fan technology in poultry farming.

Coming events from the Institute

13,142 March 2018

Lighter Side The shonkier side of the nation

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

July 2018 | www.airah.org.au/nation | HVAC&R Nation | 3

Editorial

CONTINUOUS LEARNING Time to ’fess up, even if it’s just privately to yourself while you read this column: what’s the biggest mistake you’ve made at work? Come on, we’ve all got a shame file locked in the memory bank somewhere. We could even go further and break that into categories. Most embarrassing, most costly, most dangerous . . . I’ve got a few that still make me groan. Obviously, working in magazines isn’t like working as an HVAC&R technician with flammable and toxic refrigerants – errors in publishing don’t usually cause immediate and life-threatening dangers. And misplacing a comma isn’t as big a deal as misplacing a section of ductwork, even if there is a significant difference between “let’s eat, grandma” and “let’s eat grandma”. But no matter what line of work we’re in, every day we get plenty of chances to stuff up, and – importantly – to learn. One thing about making serious blunders is that we tend to remember them. Whether it’s leaving a shoelace untied and hopping on a bike, or not checking that a ladder is tied down, we only make the mistake once. A less embarrassing/painful/dangerous way of learning is to do it through others. This month we’ve picked the brains of some top designers and technicians to highlight a few classic HVAC&R pitfalls. The feature starts on page 20 – I hope you find it useful. As an HVAC&R newbie, I’ve been on a learning curve since the start of the year, trying to get my head around the science, the technology, the industry and the politics. This has been made a lot easier by the people, who have without exception gone out of their way to help.

Airmaster even let me tag along for a day with one of their technicians at Werribee Plaza shopping centre. According to Ben Dragovic, the guy who I followed around, it was a relatively straightforward day – May in Melbourne is a time when cooling demands are minimal and the heating has not yet come on. It’s a good chance to do some housekeeping and maintenance without the phone constantly ringing. For me it was anything but straightforward. It was a real eye-opener to see the hidden city of HVAC&R equipment behind a shopping centre (it would make an awesome set for a movie, surely). Getting up close to cooling towers, chillers, boilers and even package units was invaluable, and it was great to see a professional operator looking for and finding faults. Thanks to Airmaster and Ben for the opportunity. As the saying goes, every day’s a school day. @AIRAHnews

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

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Join Australia’s leading HVAC&R directory www.hvacrsearch.com.au 4 | HVAC&R Nation | www.airah.org.au/nation | July 2018

Your HVAC&R Business Partner Thanks for helping us make ARBS 2018 a great success. We were pleased to be able to showcase our latest product and service offer, demonstrating that Heatcraft is indeed your HVAC&R Business Partner. Our Kirby Refrigeration and Lennox HVAC equipment demonstrated our local manufacturing capability and global connections. With these strengths, we are able to deliver the latest design, compressor, refrigerant and air movement technologies to meet all your capacity, efficiency and environmental stewardship targets and obligations. Through our extensive branch network, we offer a comprehensive range of parts, controls and consumables, and our smart@ccess customer portal is available 24/7 to help improve your business efficiency. If you missed ARBS, visit our website and view our stand video. For more information on any of the products on display, contact your Heatcraft Account Manager on 13 23 50.

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July 2018 | www.airah.org.au/nation | HVAC&R Nation | 5

Toolshed 01

In June, Frigel launched the next version of the system at PLAST 2018 – a global exhibition for the plastics and rubber industry. Ecodry System 4.0 incorporates process-synchronised mould temperature control units that operate over a range of 5–200°C. It’s smart enough to find the best cooling parameters and cycling sequence of heating and/or cooling on each zone of the mould to maximise the processing quality and throughput for each product.

True BLU filter

Aussie air-filtration expert Airepure has released two new air filters for commercial HVAC systems: the BLU Hybrid 100 and 300. According to the company, the hybrid filter media is synthetic, with humidity and microbial resistant properties, making the products suitable for humid, tropical and coastal areas. “Featuring a unique three-layer filter media design that effectively triples the filter surface area, BLU Hybrid filters provide high dust-holding capacity and low pressure drop,” says Airepure. “This results in longer filter life, lower energy usage, smaller fan selection and less noise in the duct.”

The cooling units at each mould are also connected to a central adiabatic water-cooling system, stored outdoors to reject the heat. 01

Frigel says this offers many benefits. “Ecodry System 4.0 achieves remarkable running cost savings when compared to traditional central systems: energy savings of up to 30 per cent, water savings of up to 95 per cent, and maintenance costs savings of up to 90 per cent.” n

The filters are rated at F6 to F9 efficiencies (MERV 11-MERV 15) and are UL 900 certified. Airepure claims the 100mm series are “perfect for any commercial HVAC filtration installation with limited space for higher-grade filtration or where UL certified filters may be required, including hospital FCUs, bed bays and staff stations.”

Testo has announced that 13 new refrigerants can now be integrated into its manifolds for refrigeration and heat pump systems.

The 300mm series filters are intended as an effective and lightweight alternative to the conventional 300mm deep V-bank style mini-pleat. “Unlike conventional mini-pleat style filters, Airepure BLU Hybrid filters have no hot melt construction,” says the company. “The unique pleated design of this formed hybrid, three-layer filter media demonstrates great stability and strength, keeping the pleats apart to withstand all air velocities with a stable, uniform air flow pattern.”

Go to www.airepure.com.au n

Reliable Controls has released a new version of its online graphical images and software service: RC-GrafxSet 3.4.

Go to www.reliablecontrols.com/products/software/RCGFX n

“Air-Met Scientific’s wealth of experience and extensive range of monitoring systems can assist you in designing a suitable solution for the accurate, long-life and cost-effective detection of refrigerant gases and oxygen,” the company says. “Complying with the requirements of AS/NZS 5149.3:2016 and the AS/NZS 67009 series (where applicable), Air-Met’s range of infra-red sensor-based detectors provide gas-specific detection of a wide range of HFCs and HFOs, and exhibit better calibration stability, longer life span (MTBF ≥5 years) and are much less susceptible to premature failure and false alarms than other, semiconductor-based sensors.” Air-Met also offers infra-red sensors for detection of natural refrigerants such as CO2 (R744), and industry standard sensors for toxic and explosive level monitoring of ammonia (R717) for compliance with the requirements of clause 9.4.3 of AS/NZS 5149.3.

Fantastic plastics

6 | HVAC&R Nation | www.airah.org.au/nation | July 2018

Aussie leak seeker

As the HFC phase-down gathers momentum and focus increases on reducing emissions, there’s greater reason than ever to upgrade or install a reliable gas detection system for the early warning and mitigation of refrigerant gas leaks. Air-Met – an Australian specialist in OHS and environmental monitoring solutions – believes it has the ideal solution.

According to the company, “monitoring the system in real time . . . provides a solution that is both scalable and that gives the operator immediate notification of poor performance, improving the likelihood of proactively identifying the root cause and resolving the fault.”

Frigel is well known in the plastics industry thanks to its Ecodry System for cooling and controlling the temperature of plastics moulds. The company claims its technology has increased productivity and reduced running costs and environmental impact in more than 8,000 installations around the world.

The new refrigerants are R1233zd, R407H, R444B, R450A, R452B, R453a, R454A, R454B, R454C, R455A, R458A, R513A and SP22 (a direct drop-in replacement for R22).

Go to www.testo.com.au n

The system incorporates two complementary components for FDD strategies: detection and diagnostics. Fault detection methods are intended to automatically detect common mechanical faults and control errors that can result in sub-optimal performance and be predictive of occupant discomfort and equipment failures. Fault detection uses various techniques, including rules-based, performance-based, system-based and value-based fault detection.

According to the company, the new refrigerants will be automatically updated on the Testo refrigeration app and the Testo Smart Probe app and can be transferred onto the Bluetooth-enabled Testo 550 and 557 refrigeration manifolds as well as the Testo Smart Probe Refrigeration Kit.

“Our units are popular with technicians because of their accuracy, efficiency and robustness,” says Testo. “There are many advantages for using Testo digital refrigerant gauges: easy-to-read screens, accurate readings, convenience of one gauge doing over 80 refrigerants, automatic calculation of superheat and sub cool, and smartphone connectivity giving the additional benefit of simple convenient reporting.”

Totally reliable

“RC-GrafxSet allows users to quickly generate professional 2D and 3D System Group graphics,” says the company. “Integrated fault detection and diagnostic (IFDD) FlexTiles are a new addition, allowing for the creation of simple, intuitive, and flexible interfaces for fault detection and diagnostic (FDD) applications.”

Lucky 13 with Testo

The company says it can meet a wide range of client needs. Go to www.airmet.com.au n

Toolshed 06

Free tool for first-year fridgies

Seeley scores awards

The Australian Refrigeration Council (ARC) is offering a free digital temperature sensor to trainee licence holders undertaking the first year of a refrigeration and air conditioning apprenticeship.

Two new products in Seeley International’s range of air conditioners have been recognised at the 2018 Good Design Awards. From the 536 innovative designs, only 260 projects earned a coveted prize.

The initiative is aimed at supporting the training and development of future HVAC&R technicians.

The Braemar Evolution (pictured) scored its award in the Domestic Appliances category.

Kevin O’Shea, chair of the ARC RAC Industry Board, said that the idea was to give first-year apprentices a tool that was not only practical in their day-to-day work, but also acted as a reminder about the importance of climate control and the environment.

“We were impressed with the low-profile design allowing the unit to be as unobtrusive as possible while seamlessly blending into the architectural form of a home,” the judges said. “Coupled with class-leading technology, this product sets a high standard for others to follow.”

“The ARC licence scheme promotes high-quality work through a skills-based licence,” O’Shea said. “It also encourages professionalism through properly equipped and staffed businesses and promotes an awareness of the environment. Providing licensed trainee holders with digital temperature sensors makes a lot of sense and will hopefully contribute to producing high-quality RAC professionals of the future.”

In the Commercial and Industrial category, the Braemar EnviroMagic also claimed an award.

The ARC digital temperature sensors will be available on request from July/August 2018, while stocks last. Email enquire@arctick.org n

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

“The unit design offers a modular system that can be easily disassembled/reassembled for transport and installation,” the judges noted. “The use of polymers, UV treated, extend the life cycle of the product exposed to weather. Good sound design solution and use of raw materials. Modular design and ease of installation and assembly is great. This is a low-cost design that has some significant effort put into it.” Go to good-design.org n

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

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July 2018 | www.airah.org.au/nation | HVAC&R Nation | 7

Global Update

USA

GRENADA

HEAT ON TRUMP

CARIBBEAN COOL

Sometimes industry acts ahead of government. And that certainly appears to be the case in the US, where 32 major air conditioning and refrigeration companies have signed a letter to president Donald Trump urging him to ratify the Kigali Amendment to the Montreal Protocol.

Grenada is trialling new air conditioning systems that use natural refrigerants.

Coming into force on January 1, 2019, the amendment aims to phase down HFC refrigerants. To date it has been ratified by 38 countries. “On behalf of the 589,000 Americans currently employed in our industries, we urge you to send the Kigali Amendment to the United States Senate for ratification,” the letter says. “It is our goal to protect and create American jobs, a goal that we know you share. “We believe that the Kigali Amendment represents a chance to put America first.” n

FRANCE

The project is being conducted with international help – the German government and development agency GIZ have provided 30 mini-split air conditioning units, all operating with the hydrocarbon propane (R290). The units themselves are manufactured by Indian company Godrej and will be used as part of a “natural” refrigerants demonstration project. This will collect, compare and analyse data between existing units using synthetic refrigerants and the new systems using R290. On May 29, Grenada became the 37th country among the 197 parties to the Montreal Protocol to ratify the Kigali Amendment, thereby committing to the global HFC phase-down. Grenada is the third Caribbean country to ratify, behind Trinidad and Tobago, and Barbados. n

CANADA

ALL ABOARD THE HFO TRAIN

THINK GREENER RINKS

The channel tunnel between France and England is one of Europe’s most trafficked railways – an estimated 400 heavy trains pass through the structure daily. It also requires some serious cooling power to keep tunnel temperatures at or below 25°C for efficient running of equipment and passenger comfort.

The National Hockey League (NHL) is partnering with Chemours to identify sustainable refrigerant alternatives for ice rinks throughout Canada and the US.

Previously, R22 was used as the gas for the tunnel’s cooling systems, but in the quest for better efficiency – and the need to meet Europe’s F-Gas (HCFC phase-out) targets – Eurotunnel has switched to HFOs. The tunnel operator claims that the new solution reduced energy usage by 4.8 GWh over the course of 2017 – the equivalent of powering 1,000 households. Additionally, it says that since 2006 it has reduced its carbon footprint by 47 per cent. n

8 | HVAC&R Nation | www.airah.org.au/nation | July 2018

The partnership announcement follows the release of the NHL’s 2018 Sustainability Report, which discusses the NHL’s environmental impact and its commitment to ensuring all levels of ice hockey thrive for future generations. There are about 4,800 indoor ice rinks in North America, with an average age of more than 30 years. The majority of the rinks use R-22 or HFC refrigerants to make ice, both subjects of international phase-outs and phase-downs. The program also supports the NHL Greener Rinks Initiative, a program committed to sharing sustainable business practices with community rink owners and operators. n

RUSSIA

SUPERCOMPUTER IN HOT WATER The Russian RSC Group has announced the world’s first 100 per cent “hot water” liquidcooled supercomputer for use at the Joint Institute for Nuclear Research (JINR) in Dubna. “Our scientists and research groups now have a powerful and modern tool that will greatly accelerate theoretical and experimental research of nuclear physics and condensed matter physics,” says JINR director Vladimir Korenkov. Among its complex tasks, the supercomputer will be used to recreate quark-gluon plasma – a special state of matter seen in the first moments after the Big Bang. Using dry coolers running at 50°C ambient temperature, the system uses less than 3 per cent of consumed power for cooling – an outstanding result for the super computer industry. n

USA

COLDER THAN COLD NASA’s Atomic Fridge will make the International Space Station (ISS) the coldest known place in the universe. Slated to be sent to the ISS later this year and known as the Cold Atom Lab (CAL), the fridge will allow physicists to conduct experiments not possible on Earth. In normal circumstances, atoms bounce off each other in all directions at a few hundred metres per second. Yet CAL can reach temperatures that are just one ten-billionth of a degree above absolute zero, the point at which matter loses all its thermal energy. This means all the chaotic atomic motion comes to a near standstill known as a BoseEinstein condensate. “The way atoms behave in this state gets very complex, surprising, and counterintuitive,” says scientist Eric Cornell. “That’s why we’re doing this.” n

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July 2018 | www.airah.org.au/nation | HVAC&R Nation | 9

Feature

COOL CHICKS As our appe tite for chick en continue using HVAC s to increase technology , farmers are to help prod uce healthie r and happie writes Sean r birds, McGowan. A little more than half a century ago, Australians consumed 7kg of chicken per person every year, on average. Fast forward to 2015/16 and that figure had grown to over 46kg – making chicken the country’s favourite meat.

Broiler chickens (the chickens farmed for meat) are especially susceptible to heat stress due to their inability to sweat.

According to Australia’s representative body for the industry, the Australian Chicken Meat Federation (ACMF), one of the main reasons for the growth in chicken consumption is affordability. While other meats have become more expensive, there has been no increase in the real cost of chicken meat over the past 50 years. But how has this been achieved?

This has resulted in chicken growers taking a particularly keen interest in HVAC technologies, including ventilation systems, and temperature and humidity controls.

“The chicken industry has been able to deliver a more affordable product because of significant improvements it has made in the efficiency with which chicken meat is produced, and overall improvements in productivity,” says the ACMF.

Forty kilometres north-west of Melbourne, Greenfield Poultry has embraced the latest in fan technology to ensure its birds are kept in the best conditions while growing.

The Federation says substantial research has contributed to advances such as better feeding practices and bird nutrition, improved housing and husbandry, and improved flock health. Growing periods of up to 60 days can involve both heating and cooling regimes, varying according to the ambient temperature and the season.

“Greenfield Poultry wanted to use the best available technology to future-proof their business,” says ebm-papst sales manager for Victoria and Tasmania, Christopher Hauck. Having worked with the Australian agricultural sector for three decades, the fan manufacturer collaborated with the farm, as well as the shed designer and controls experts, to develop a solution based on traditional EC (electronically commutated) technology – that is, fans with a brushless DC motor.

Each shed’s temperature distribution is only 0.2–0.3°C across the length of the shed

GREENFIELDS

In 2014, owner Bobby Stankovic approached leading fan manufacturer ebm-papst to develop a cooling system for eight new broiler sheds being built on the farm. These massive sheds – measuring 17.8m wide and 160m long – can house up to 50,000 broiler chickens. They feature the highest level of redundancy to ensure the health and safety of the birds at all times.

10 | HVAC&R Nation | www.airah.org.au/nation | July 2018

CONTROLLED CONDITIONS The environmental conditions of Greenfield Poultry’s broiler sheds need to be able to change as chickens are grown from day-old pullets (chicks) to 55-day-old, 4kg birds ready for harvest. Beginning at 32°C and 80 per cent humidity, the temperature may need to fall to as low as 20°C and less than 50 per cent humidity depending on the growth phase and season. Minimum air speeds of 3m/s are typical.

Feature Each tunnel fan has been installed with a shutter system, controlled by a 24V DC actuator. An uninterrupted power supply back-up system provides a high level of system redundancy and reliability.

Christopher Hauck setting up the AgriCool monitoring system.

Should a fan failure occur, the other fans will automatically increase in speed to achieve the required shed conditions. According to ebm-papst’s Alexandra Gray, each fan can be monitored and accessed from the shed’s control room, as well as remotely via an internet connection to provide the farmer both onsite and offsite control.

BROODING PHASE Every broiler shed also features a dozen 200mm EC destratification fans to make the brooding phase – the period during which young chicks are kept warm as they grow rapidly – easier, simpler and cheaper.

To achieve these conditions as well as provide appropriate redundancy, a ventilation system was developed to meet the needs of the poultry farm and the wider Australian poultry market. Known as AgriCool, the system features a bank of tunnel fans installed on each shed to achieve specific conditions.

At Greenfield Poultry, each shed features 14 1250mm EC direct-drive tunnel fans. The fan system is controlled by a purpose-built, touch-screen interface that operates in parallel with the main shed controller.

These destratification fans reduce the temperature differential between the shed’s ceiling and floor without affecting bird comfort. By moving warm air from the ceiling down to litter level, the litter temperature is increased to promote even bird spread, and thereby improved bird comfort.

The sheds feature sensors that monitor the internal environment, with the system programmed to adjust the rate of ventilation accordingly, to optimise the climate conditions.

“This means that each shed’s temperature distribution is only 0.2–0.3°C across the length of the shed,” says Stankovic, “providing uniform growing conditions.”

July 2018 | www.airah.org.au/nation | HVAC&R Nation | 11

Feature POWER SAVINGS As well as being able to closely control the shed conditions, the speed control methodology of the fan system results in dramatic power savings of 70 per cent compared to traditional systems. This significantly reduces the running costs of broiler sheds on poultry farms, impacting positively on the farm’s bottom line. “Farmers are being driven to supply meat at lower and lower prices,” says Hauck. “Increasing electricity costs are dramatically affecting returns on investment and growth margins.” The EC technology used in the fans has also allowed for power factor correction. This is important given the electrical supply contracts typical of poultry farms.

Alexandra Gray commissioning the AgriCool system.

PROJECT AT A GLANCE THE PERSONNEL Client: Greenfield Poultry Controls: HMI Electric Electrical contractor: HMI Electric Mechanical services design: ebm-papst

HVAC EQUIPMENT Controls: ebm-papst Fans: ebm-papst

REAL-LIFE PERFORMANCE

Completed in early 2015, the tunnel fan technology used on the broiler sheds at Greenfield Poultry has delivered optimal growing conditions for the farm’s chickens to help meet local demand.

Hauck says one of the key lessons to be taken from this project was the early involvement of and communication between all parties involved. “Fans are usually selected towards the end of a project,” he says. “Being able to understand what exactly was needed from the start enabled us to provide a more tailored solution to the grower’s specific requirements.”

So, it seems that just as there would be no beer without refrigeration, there may well be less chicken without HVAC. Think about that next time you tuck into a chicken parma at the pub! n

Advertise in HVAC&R Nation in 2018 HVAC&R Nation, has the highest distribution and readership of any HVAC&R publication in Australia. Targeted distribution Circulation 13,170 Readership 32,925 HVAC&R Nation is distributed free over the counter at more than 260 outlets Australia-wide including: Actrol, Heatcraft, Airefrig Australia, Beijer Ref, Cold Chain Group, Polyaire, Reece, Totaline, Tradeline Plumbing and TAFE colleges.

Contact: Glenn Douglas – glenn.douglas@airah.org.au or John McGrath – john.mcgrath@airah.org.au 03 8623 3000 12 | HVAC&R Nation | www.airah.org.au/nation | July 2018

Cool Tech

REBOOTING A CLASSIC Do you yearn for the good old days of video gaming? When scores were in the hundreds rather than the hundreds of thousands? When you used a joystick with one or two buttons rather than a “controller” with a dozen or so? Well hopefully you’ve been saving your 20-cent pieces, because one of the legends is returning.

Image: Ale Di Lullo.

Atari is back with a console called the VCS. Although this machine was born in the 21st century, it retains its 80s styling. The US$299 (Au$395) package features

According to the company sales pitch, the new system also has “proprietary Atari VCS user interface with optional voice control and integrated web browser for full access to all that the internet has to offer to navigate and curate your personalised entertainment experience.”

real wood veneer on the front of the console – just like the original 2600 system – and includes a Bluetoothenabled, retro-styled Atari joystick controller.

This makes it much more than a novelty offering for Gen X gamers – it could compete with Playstation 4, the Xbox One and even Apple TV.

The retro approach extends to the games. Despite the ups and (mainly) downs of the company over the decades, Atari still owns the rights to more than 200 different titles, including classics such as Pong, Missile Command, Asteroids, and Centipede. Many of these games will come with the VCS, as part of a software package called the “Atari Vault”.

Before you get too excited, however, some bad news and some good news. The bad is that the system doesn’t actually exist yet and Atari is relying on a crowdfunding campaign to get it up and running. The good news? Pre-orders topped US$2 million on the first day of offer, and it was so popular it crashed the crowdfunding website.

But it’s not all old school. The new Atari console boasts 4GB of RAM (just a slight improvement over the original’s 128 bytes) and 32GB of storage. It runs open Linux architecture with 2.4/5 GHz Wi-Fi, Bluetooth 5.0, an Ethernet jack and four USB 3.0 ports.

The foremost resource

If all goes according to plan, the system will be available in the first half of next year. n To get your order in visit www.indiegogo.com and search for “Atari”.

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EDITION 05 EDITION 05

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July 2018 | www.airah.org.au/nation | HVAC&R Nation | 13

Green wedge

DOORS OF PERCEPTION A Dutch cafe has inserted a revolving entryway that generates energy every time someone walks through it.

Netherlands-based Natuurcafé La Port recently installed an energy-generating revolving door. Every time someone walks in for a brew, they give a little bit of energy back to the coffee shop. “The NRG+ TQ is a revolving door with three or four door wings, available in a variety of diameters and finishes,” says its manufacturer Boon Edam. “Instead of a normal manual or automatic drive unit, this revolving door has a special generator that converts the energy applied to turn the door into electricity that can power the low-energy ceiling lights. “Although the amount of energy that can be generated through the NRG+ TQ is relatively low, as a building’s first impression, it tells visitors that the occupants care about the environment and strive to build a sustainable future.” The door was part of the refurbishment of the Driebergen-Zeist railway station, which was designed by innovative architecture firm RAU. The door is expected to generate about 4600kWh of energy each year. A transparent ceiling shows how the system works, and LEDs display the amount of energy generated each time another caffeine addict wanders through the door looking for a fix. “Developing a revolving door that could use the human energy applied to turn the door into electricity has long been a dream of Boon Edam’s engineers,” the company says. “As early as the late 20th century our engineers were studying how this could be achieved, but the right technology was not yet available. It wasn’t until 2008 that the first NRG+ TQ was installed.” n

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14 | HVAC&R Nation | www.airah.org.au/nation | July 2018

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HVAC&R

MODULE

113

Skills Workshop PROUDLY SPONSORED BY

Skills summary nâ&#x20AC;&#x201A;What?

A guide to fan test configurations, fan performance (including performance curves), and manufacturersâ&#x20AC;&#x2122; selection aids.

nâ&#x20AC;&#x201A;Who?

PULLOUT

Relevant for anyone involved in the design, selection, installation, operation, maintenance and assessment of fans and fan systems.

INTRODUCTION This section discusses the performance rating of fans, the tests used to rate performance, how test data is turned into performance information, the limitations of the test methods and the data produced. The section also discusses fan and system efficiency and the overall impact of fans on system energy use.

FAN TEST STANDARDS In order that the performance of various products can be compared, fan manufacturers must rate the performance of their equipment in accordance with a recognised code or standard. The following are the main fan test methods and standards used by fan manufacturers: AS ISO 5801 deals with the determination of the performance of fans of all types except those designed solely for air circulation e.g. ceiling fans and table fans. Estimates of uncertainty of measurement are provided and rules for the conversion, within specified limits, of test results for changes in speed, gas handled and, in the case of model tests, size, are given. This standard allows the use of a star type straightener for ducted tests. AS ISO 5801 superseded AS 2936. AS 4429 classifies smoke-spill fans and describes laboratory test methods and procedures used to rate their performance (and that of their motors). Fans are rated in terms of their suitability to operate continuously without significant loss of performance for a specified time at a specified air temperature. This standard deals only with laboratory type testing and does not consider the testing of smoke-spill fans after they have been installed in a building. Performance ratings are specified in AS/NZS 1668.1.

FAN

PERFORMANCE This Skills Workshop discusses the performance rating of fans, the tests used to rate performance, how test data is turned into performance information, the limitations of the test methods and the data produced. It also discusses fan and system efficiency and the overall impact of fans on system energy use.

ANSI/AMCA 210 / ANSI/ASHRAE 51 Laboratory Methods of Testing Fans for Certified Aerodynamic Performance Rating defines uniform methods for conducting laboratory tests on housed fans to determine airflow rate, pressure, power and efficiency, at a given speed of rotation. The standard also includes requirements for checking effectiveness of the airflow settling means and testing for chamber leakage. This standard and test method(s) is equivalent to but not identical with AS ISO 5801. AS/NZS ISO 12759 specifies requirements for classification of fan efficiency for all fan types driven by motors with an electrical input power range from 0.125kW to 500kW. It is applicable to bare shaft and driven fans, as well as fans integrated into products. Fans integrated into products are measured as stand-alone fans. It is not applicable to fans for smoke extraction; fans for industrial processes; fans for non-stationary applications (e.g., trains, aircraft, automotive), fans for explosive atmospheres; box fans, powered roof ventilators and air curtains or jet fans for use in carparks and tunnel ventilation. ISO 5802 deals with the determination of the performance of fans as they are installed within a system, i.e., an in-situ performance test method. ISO 13347 deals with the determination of the acoustic performance of industrial fans. It may be used to determine the acoustic performance of fans combined with an ancillary device such as a roof cowl or damper or, where the fan is fitted with a silencer, the sound power resulting from the fan and silencer combination. ISO 13350 deals with the determination of the performance of jet fans. ISO 14695 describes a method of measuring the vibration characteristics of fans and ISO 14694 gives specifications for vibration and balance limits of fans of all types except those designed solely for air circulation.

ISO 1940 specifies balance tolerances, the necessary number of correction planes, and methods for verifying the residual unbalance for rotors in a constant (rigid) state. Recommendations are given concerning the balance quality requirements for rotors in a constant rigid state according to their machinery type and maximum service speed. A balance quality grade of G6.3 is appropriate to most fans and a grade of less than G2.5 is usually only achievable on very special equipment. ISO 1940.1 states acceptance criteria for the verification of residual unbalances. Detailed consideration of errors associated with balancing and verification of residual unbalance are given in ISO 1940.2.

TEST CONFIGURATIONS Fan performance curves are produced by the manufacturer by testing a fan in standardised conditions as prescribed by the relevant standard such as AS ISO 5801. There are four standard test configurations that attempt to represent the range of basic fan applications as shown in Figure 1. Roof ventilator fans are represented by Category A, roof discharge fans by Category C. Centrifugal fans in air handling units or plenums are likely to be represented by manufacturers as Category B. Category D is the one most likely to be closest to the representation of both axial and centrifugal fans in many ducted ventilation and air conditioning applications. Many heat rejection fan applications in refrigeration are represented by Category A. Centrifugal fan performances have usually been derived from measurements for fans with free inlets and ducted outlets (category B), but this depends on the size and type of fan. For axial fans,

July 2018 | www.airah.org.au/nation | HVAC&R Nation | 15

HVAC&R Skills Workshop

a) Category A

b) Category B

c) Category C

d) Category D Figure 1: Fan test configuration categories.

Open inlet measurements (categories A or B) may be taken with or without an inlet cone fitted. The fan performance without an inlet cone is likely to be less than that with a cone. Restricted space around the inlet of a category A or B fan, or around the outlet of a category A or C fan, will affect the performance. For optimum performance there should be no restriction within two fan diameters. This is of major importance wherever the fan is contained within a machine or a box, such as an air handling unit or a dust collection unit. Fans mounted in a manner that does not reflect any of the standard categories (such as roof extract fans, or in air handling units) will have altered performance characteristics. With good duct design, most fans (except platemounted fans) give their highest performance under category D conditions. Reference to manufacturer catalogues should show which installation category has been used in the test, but where there is doubt, the manufacturer should be contacted for clarification.

FAN PERFORMANCE Performance data may be presented either graphically in a fan curve, or in tabular form in a rating table. Performance data is either listed for standard air temperature and pressure, or the air temperature, density and pressure at which the tests were carried out are listed so that appropriate adjustments to expected performance can be made.

corrections should be applied when obstructions and accessories exist and to account for the effect of the system connections.

Note: pt = ps + pv, therefore pt can never be less than pv, so the fan performance curve doesn’t reach zero pressure, but rather pv. When volume flow is zero pt = ps and pv = 0

Fans are also commonly packaged into products such as air handling units, rooftop units, ducted split air conditioners and other HVAC&R systems and products. It is important to consider the performance of these products, as a fan in a packaged unit, rather than as a fan connected to a ductwork system. Individual product manufacturers should be able to provide product performance data which accounts for casing losses and internal components. Designers should rely on this information instead of using stand-alone fan performance data for such equipment.

Power Vs Volume curve – plot of the fan power drawn for any point on the performance curve. Efficiency Vs Volume curve – plot of fan efficiency for any point on the performance curve. The efficiency curve is produced by dividing air power (air power = pressure in Pa × volume flow rate in m3/s) by the power input to the fan unit. This can be static efficiency (using ps) or total efficiency (using pt). See equation 1. Note: ISO12759 requires the use of motor input power.

Using the test data, a complete set of fan performance curves is produced as illustrated in Figure 3.

FAN PERFORMANCE CURVES

Fan performance curves offer a convenient method of fan selection as well as additional information such as the amount of reserve pressure that exists between the design pressure and peak available pressure, the maximum power the fan may draw and the likely efficiency of operation.

The fan performance or characteristic curve is a graphical representation of fan performance and is one of the most useful tools for optimising fan selections. A series of performance curves for a particular fan type is usually presented as a graph of flow versus pressure and flow versus power with a separate curve for each particular fan speed.

Typical “generic” fan performance curves for common fan types are shown in Figure 4.

Fan performance curves are developed based on standard tests measuring the output of a fan, its volume flow rate, and pressure for a range of conditions. This concept is shown in Figure 2, with tests ranging from the flow being fully closed off to when the air path is completely open, all measured at a constant fan speed (although fan speeds do vary when tested). Back pressure fans are typically used to change the duty of the fan under test. At the same time the power input to the motor is recorded and operating noise levels are established.

Note: None of these curves would “hunt” as the system resistance curve would need to intersect the fan curve at two points. However, a steeper vane axial fan curve to the left of peak pressure, would lead to instability for certain specific system curves, hence the warning “Possibly Unstable”. Note: Some designers prefer to select at 10–15% below peak pressure.

The fan performance graph is generally composed of a series of separate performance curves including: Static pressure Vs Volume curve – Called the fan performance or fan characteristic curve, this is a plot of static pressure against volume at a constant speed and gas density. Fan total pressure (pt) and velocity pressures (pv) are also plotted against volume.

These typical curves are exaggerated and idealised indicative performance curves. Individual fans will perform differently from this although the attributes will be similar. This includes the areas of instability shown where the fan can flip between two possible flow rates at the same pressure, called hunting, or instability as a consequence of the fan stalling (refer to Section 7). Some axial flow fans have adjustable pitch blades of which the first 10–20 degrees have a non-stalling characteristic. Manufacturers will generally identify recommended working ranges for their products within their technical literature.

Blocked off Shutoff

It should be remembered that catalogued fan performance data is the result of testing generally without any obstructions in the fan inlet or outlet and without any optional accessories in place. Unless careful design of inlets, outlets and ductwork has been undertaken a fan will not perform in practice as per the catalogued performance data. Appropriate pressure drop 16 | HVAC&R Nation | www.airah.org.au/nation | July 2018

Less restricted Fan cha rac

ter is

Flow straighteners

Note: Standard temperature and pressure (STP) air is defined as clean, dry air with a density of 1.2 kg/m3, a sea level barometric pressure of 101.325kPa and a temperature of 20°C.

Restricted

Static pressure

ducted inlets and ducted outlets have usually been used. These methods have been adopted for convenience since, for double-width centrifugal fans, flow measurement at the inlets would be difficult and for axial fans the presence of swirl at the outlet causes complications. Flow straighteners are used to remove the swirl in AS ISO 5801.

Wide open

Volume flow (q) Free delivery

Measuring station

Figure 2: The creation of a fan performance characteristic.

HVAC&R Skills Workshop airflow (m3/s) x Total pressure (Pa) x 100 Total efficiency % = Power input, in W

Equation 1

airflow (m3/s) x Static pressure (Pa) x 100 Static efficiency % = Power input, in W

The most important issue with computer selection programs is to input the correct information about the fan application. This includes an accurately calculated fan duty and the other specific conditions of service such as air temperature and density. Most fan curves are only valid for standard temperature and pressure ranges.

Fan effi cie n

Pressure Power Efficiency

Optimum selection range n Fa ta to s re

es pr

re su

tic s ta

oc Fan vel

ssure it y pre

Volume flow (q)

Total pressure

PULLOUT

Figure 3: Fan performance curves showing recommended selection range.

Back ward-cur ve aerofoil V a n e a xia

Possibly unstable Safe working ranges

For w a rd - c u r v e d c e nt r i f u g al A xial

Note: A certified performance curve should require a works test be performed on the specific fan being supplied. In the HVAC&R market, a works test is not often specified or allowed for within project budgets.

MANUFACTURER FAN SELECTION AIDS Selection charts

Volume flow (q) Figure 4: Typical ‘generic’ fan performance curves.

PUBLISHED AND CERTIFIED PERFORMANCE CURVES The fan performance curves generated under test become the basis of the catalogue curves and selection tables used by manufacturers to market their products. The manufacturing process and associated tolerances are designed to ensure that a fan will match the catalogued performance. When purchasing or specifying a fan, designers can request its certified performance curve to ensure compliance with the published data. Unlike the published curve, which represents a general curve or set of curves for a fan model and size, the certified performance curve reflects the actual test results for a particular fan.

PROUDLY SPONSORED BY

INTERPRETING FAN MANUFACTURER DATA With a basic understanding of the fan performance curve, designers can predict the way the fan performance would change if the fan characteristics were changed or if combinations of fans, in series or in parallel, are used in a system. Designers need to be aware of the following uses when interpreting performance curves:

re su

in p

n Fa

p ut

Many fan manufacturers have web-based selection programs available. The most appropriate choice will still depend on many factors. Specifiers and designers should review choices in detail rather than rely on a choice made from a brief comparison summary table.

A selection chart shows the performance map for a family of similar fans. They are often formatted on semi-log or log-log scales to display a wide range of flow and pressure on a single chart. The chart shows the various fan sizes and designs available and a selection is made by evaluating the fans with a best efficiency point near the specified operating points. Once the fan size has been selected the individual fan performance curve should be consulted for full details of the fan performance, capability and characteristics.

Fan rating tables Similar to fan selection charts, multi-rating tables have traditionally been used for selecting centrifugal fans. Usually airflow, pressure, fan speed and power are tabulated, for equal increments of outlet velocity for a given size of fan.

Fan performance curves are developed under controlled test conditions with the fan installed with favourable inlet and discharge connections. These connection conditions are often not able to be replicated in the field. Fan performance curves are developed under a specified air condition (temperature, pressure, density), the air conditions prevalent during the test. Check the actual conditions the fans have been tested at. Do not rely on the term “Standard” to identify this as this varies between fan test centre locations. Fan performance curves are generally developed without any of the optional accessories that may be available. Some accessories may alter the aerodynamic performance of the fan and hence will vary from the standard performance curve. Fan noise is a function of the fan design, volume flow rate, total pressure and efficiency. The sound power generation of a given fan performing a given duty is best obtained from the fan manufacturer’s actual test data taken under standardised test conditions. However, test conditions vary and some manufacturers display actual measured data without manipulation while others manipulate data to provide example induct noise levels which changes for each different installation. The true measured sound power data is the only way to compare how each fan will perform in the specific installation. Manufacturers generally have available descriptions of how the fans are tested and how the data is presented. n

These tables can be used for fan selection although some interpolation may be required. THE AUSTRA

Computer selection programs More frequently used than traditional charts or tables, computerised data selection allows for the rapid selection of many possible fans and selection optimisation at the click of a button.

LIAN INSTITU

REFRIGE TE OF

RATION

, AIR CONDIT

IONING

AND HEATING

DA13 FANS

APPLIC

ATION

MANU

This month’s Skills Workshop has been taken from AIRAH Application Manual DA13 – Fans.

Next month: Applied psychrometrics July 2018 | www.airah.org.au/nation | HVAC&R Nation | 17

18 | HVAC&R Nation | www.airah.org.au/nation | July 2018

Legal Speak

MANAGING COMPLAINTS WHILE GETTING PAID Have you encountered customers who make unreasonable complaints and refuse to pay? HVAC&R Nation’s legal expert, Frank Gambera, explains how to protect yourself.

Terms and conditions are arguably the single most important document in any customer transaction

This could include such things as diarised events, locations, times, actions and records of conversations along the lines of “customer said” and “I said”. If an employee or co-worker witnessed a dispute, having them record the event is also powerful evidence.

What should you do? Businesses and/or contractors should have a skilled commercial lawyer carefully review their terms and conditions. If you do not have any or don’t really understand the ones you are using, it is worth consulting an expert to ensure your business is protected. Remember, terms and conditions are arguably the single most important document in any customer transaction. It is like the rule book – any dispute or customer complaint will be resolved according to what is written here. The great thing about well-drafted terms and conditions is that you can reuse them with each and every customer for years to come in the knowledge that your rights will be protected. Maybe even just as good is that they are also a tax-deductible business expense. So, it makes great business sense to invest in protecting your business and take away the worry of not getting paid when a customer complains. You know the type. Nothing you do is good enough and no amount of common sense makes a shred of difference. To make matters worse, sometimes these customers even refuse to pay, despite the fact you have supplied and installed the correct equipment. Unfortunately, there is no magic formula that will stop you getting customer complaints. But there are legal mechanisms that can protect your rights and make sure you get paid even when a dispute is on foot.

Terms and conditions (T&Cs) of supply Firstly, it is essential to legally protect your business with well-drafted terms and conditions. These must be provided to your customer before any work is undertaken. This can easily be done by incorporating the terms and conditions into your quotation or invoice. For the terms and conditions to be enforceable, your customer must have had the opportunity to read and sign off on them before any work commences. That way a court will find that the terms and conditions are enforceable because the customer has indicated their agreement to be bound by them at the outset.

In a nutshell

What do the terms and conditions do?

Here’s a quick summary of what to do: 1. Have a commercial lawyer review and/or draft terms and conditions tailored to your business needs

Terms and conditions can be drafted to suit your individual business needs. For example, payment clauses can be drafted in such a way that it is unlawful and a breach of your agreement for a customer to withhold payment in the event of a dispute. The clauses can also allow you to apply penalty interest.

2. Include these terms and conditions as part of your quotation or invoice 3. Ensure your customer signs the quotation or invoice to demonstrate acceptance of these terms 4. Provide the customer with their own signed copy. n

Mediation clauses can be used to outline the process that must be followed to resolve a dispute. This can be effective in saving both parties time and money. Once you have well-drafted terms and conditions in place, if a customer refuses to pay your bill, they will be in breach of your agreement and you will have legal grounds to protect and enforce your rights.

Documenting complaints Hopefully the matter won’t proceed to court, but the more written evidence you have to support your version of events, the greater your chance of success. A court will give much greater weight to written evidence than oral statements.

Frank Gambera is a director for McMahon Fearnley Lawyers. Contact him at fmg@mcmahonfearnley.com.au or (03) 9670 0966.

July 2018 | www.airah.org.au/nation | HVAC&R Nation | 19

Cover Feature

WATCH YOUR STEP!

#2 TENANCY FIT-OUT OF INTERNAL STAIRS REQUIRING MODIFICATIONS The problem Connecting two or more floors as a single fire compartment in a zone pressurisation building means the base building essential services must be modified to suit. Sometimes, however, the required modifications are overlooked or inadequately scoped. The existing base building systems may not support the required changes, and/or the works may not be adequately documented.

Why it happens Project scope gap due to knowledge gap. Inadequate documentation, or documentation that is not carried through into base building working documents (e.g., fire matrix and testing procedures). There is also a potential “us versus them” attitude due to reluctance of fit-out project team to get involved in base building essential services works and reluctance of base building contractors to get involved in tenancy works.

Ours is an in dustry full of pitfalls that n This month, eed to be av Sean McGo oided. wan speaks to discover s with two lea ome of the le d ing consulta sser-known nts related to th issues, as we e installation ll as those of the comm the simplest o n s p li t system. Yes, installations even can trip you up if you’re n ot careful.

How to do it correctly the first time Ensure that the existing system operation and proposed system operation are clearly documented and the modifications are clearly scoped for all services. Undertake pre-testing to ensure that the systems currently perform and will achieve the proposed performance requirements. Ensure that one contractor is responsible for the outcome of the works, ideally the head contractor. Ensure that the existing base building documentation is modified as part of the works and handed back to the client/building management.

Need more information? You’ve no doubt come across your fair share of shoddy installations. If not, you only have to look at The Lighter Side in each issue of HVAC&R Nation to see what goes on when no one is looking. But while you might be aware of many pitfalls, it never hurts to share other people’s wisdom – especially when they are industry experts. Alastair Chapman, M.AIRAH, is an associate with GWA Consultants Australia. Working for a mechanical consultancy specialising in refurbishing and upgrading existing occupied buildings, Chapman has seen the best and worst of the HVAC industry. We pulled him out of the plant room to describe some of the pitfalls he has come across, including kitchen exhausts, essential services and the time wasted in testing systems.

#1 FAN PERFORMANCE IN KITCHEN EXHAUSTS The problem Underperforming system due to poor fan connections.

Why it happens Inadequate footprint allocated during design. Poorly designed and/or constructed fittings will affect fan performance. Increase in required system duty post-design or construction.

NCC Volume 1 Part E2, AS/NZS 1668.1.

Set and manage client

#3 WASTING TIME

expectations – always

The problem

in writing.

Huge amounts of time are wasted during essential services tests, including issues with delayed starts, access and under-resourcing.

Why it happens How to do it correctly the first time Ensure sufficient space is allocated or created for the installation. Set and manage client expectations – always in writing. Carefully select/design/manufacture fittings at the fan connections, as these can be the major points of pressure loss. Test the sensitivity of your ductwork design and fan selection. How will a 20 or 50 per cent increase in flow affect the fitting pressure losses, system effect and fan performance? How could the fan connections be improved? Would the fan handle the revised duty? Could the fan be modified to handle the revised duty? Or would it need to be replaced?

Need more information? AIRAH DA03, chapters 6 and 7, AS 4254.2, ASHRAE Fundamentals Chapter 21, Fan manufacturer’s literature, peers.

20 | HVAC&R Nation | www.airah.org.au/nation | July 2018

Inadequate planning.

How to do it correctly the first time Get hold of all existing testing documentation, do a dry run by yourself and come up with your own procedure. What sub-contractors do you need and how many personnel from each? Who is organising security and how many guards are needed? Where do you need access and what keys and passes are required? Who is notifying the tenants? Do you need to get above ceilings? Do you need anything moved or protected? The more questions asked and answered in the lead-up to testing, the smoother things will run on the night.

Need more information? AS/NZS 1668.1, project and or base building documentation.

Cover Feature Why it happens

Smoke fan fire dampers installed in a common wall.

A cost-effective alternative solution installed by an inexperienced project manager is combined with a lack of internal design review coupled with no independent review.

How to do it correctly the first time Read the fire engineering report and discuss the rationalised design with the mechanical and/or fire consultants to ensure that you understand what is to be installed. Ensure that the fan supplier knows the fans’ application, normal duty, fire-rated etc.

Need more information? There are no prescribed requirements for a smoke clearance system, so you need to ensure that you understand the fire engineer’s design and installation requirements.

To subduct or not There are many pitfalls to avoid when it comes to applying alternative solutions to the Building Code of Australia (BCA). With regards to entry of smoke for smoke-spill systems, the AS/NZS 1668.1-1998 guidance notes state that to prevent smoke from infiltrating into other compartments, subducts are required at each entry point into the shaft such that smoke has to flow downwards before it can enter the other compartment. But in lieu of subducts, high-temperature fire and smoke dampers are often used. Those in the fire-affected compartment open, and those within non-fire-affected compartments close, to mitigate smoke spread between compartments to the extent required by the deemed-to-satisfy provisions and AS/NZS 1668.1–1998. Ivan Steed, M.AIRAH, project team leader – essential services with Grosvenor Engineering Group shares some of the pitfalls associated with applying alternative solutions to the use of subducts.

#1 BCA alternative solution 1 FIRE DAMPER/SMOKE DAMPER IN LIEU OF SUBDUCTS

How to do it correctly the first time In lieu of subducts, motorised fire dampers with smoke tip seals should be installed with their thermal release mechanisms omitted.

#3 B CA alternative solution 3 FIRE DAMPERS AND SMOKE DAMPERS INSTALLED IN A COMMON WALL The problem

Need more information? AS/NZS1668.1:2015 Appendix B, Principles of Subducts.

#2 B CA alternative solution 2 SMOKE CLEARANCE FANS IN LIEU OF SMOKE EXHAUST FANS

As a cost-effective performance solution, smoke dampers and fire dampers were nominated over several revised design changes for a wall that is common to an atrium.

Why it happens The installation contractor did not review, understand and/or contribute to the final installation detail proposed by the fire consultant.

The problem

How to do it correctly the first time

Rationalisation of a required specification E2.2b smoke exhaust system involved 20 supply air fans being installed on a warehouse roof. The supply air fans stop in fire mode and are manually switched to reverse and exhaust the compartment via an override switch adjacent to the fire indication panel. The fire engineering report specifies fire-rated fans and cabling. However, the installed fans and associated cabling are only rated for normal duty.

If you are the mechanical contractor, make sure you are involved in the review process of the mechanical services performance solution.

Need more information? Ensure that whoever is reviewing the fire engineering report has the appropriate knowledge to be able to provide compliance input regarding the proposed mechanical services installation detail.

A smoke damper installed in lieu of subduct.

The problem As a cost-effective performance solution, motorised fire dampers/smoke dampers are sometimes installed in smoke exhaust shafts in lieu of subducts. In the example on the right, a surface-mounted smoke damper was installed with a high-temperature curtain fire damper behind it.

Why it happens A cost-effective alternative solution installed by an inexperienced project manager is combined with a lack of internal design review and the fire engineer not using the correct mechanical services terminology. July 2018 | www.airah.org.au/nation | HVAC&R Nation | 21

Cover Feature

No!

#2 TWO OR MORE CONDENSERS ARE INSTALLED TOGETHER The problem When two or more outdoor units/condensers are installed together in one place, the warm air blown out the back of one unit is sucked into the unit located in front, and normal heat exchange cannot occur, degrading performance and in some cases damaging the compressor.

No!

Why it happens Don't enclose units.

The pitfalls of splits There are also plenty of pitfalls to avoid when installing split systems. According to post-installation research conducted by Daikin, gas leaks from flare joints made up over 26 per cent of faulty installations in Japan, followed by faulty control wire connections making up almost 19 per cent of faulty installations. “Nearly 70 per cent of the mistakes belong to five error categories,” says Daikin. “You can greatly improve your installation work by paying close attention to these five areas.” These five areas include flare joints, faulty control wire connections, improper electrical wiring, improper drainpipe installation, and unsuitable installation locations. Daikin highlights three common pitfalls when it comes to split system installation.

#1 DON’T ENCLOSE THE UNIT The problem

Restriction of appropriate outdoor space, or ease in installation might result in two or more outdoor units being placed in close proximity.

Why it happens Sometimes the refrigerant pipe run needs to go around corners, but creating too sharp a bend reduces the flow of the refrigerant.

How to do it correctly the first time Since the bent section of refrigerant piping creates resistance to the flow, the number of bends should be kept to a minimum. Additionally, any bends in the pipe must be made carefully to avoid crimping the pipe. Whenever possible, use a pipe-bending tool. A very gentle bend may be made by slowly applying force by hand, but avoid bending abruptly or it may break or crimp.

Need more information? Speak to the product manufacturer or supplier.

How to do it correctly the first time When two or more outdoor units are installed in a single location, they must be placed so that they do not directly suck the air blown by the other unit(s), with adequate distance between them as shown in the product specification.

Need more information? Speak to the product manufacturer or supplier.

#3 REFRIGERANT PIPING TREATMENT The problem A crimped or damaged refrigerant pipe disturbs the normal flow of the refrigerant. The capacity drops and imposes a load on the compressor that may result in problems. Additionally, cracking may develop from a crushed point, resulting in refrigerant leaks.

FIELD PIPING Remember that with refrigerant piping: • Shorter refrigerant lines with minimal bends optimise system performance. • Knowing the maximum allowable piping length for the unit is vital. • Cap the ends of the piping to protect them from dust and moisture. • Avoid bending the piping too much, and when necessary, use a pipe-bending tool. • Be sure to apply insulation around the indoor drainpipe. Source: Daikin

As we saw in last month’s “Locked Up” feature, enclosing the unit will result in a short cycle of the outlet air, and create difficulty in the replacement of filters. The air conditioner’s capacity is degraded, and if the air conditioner is used in this state for a long time, an abnormal load is imposed on the compressor, and the compressor becomes defective.

Why it happens Customers will often prioritise aesthetics over function. Guide them as to the best installation locations. Similarly, don’t install in a place that’s the easiest and quickest – install in the correct position.

How to do it correctly the first time Indoor units are designed for direct blowing. Therefore, don’t install a cover. If the air conditioner must be hidden because of design requirements, use the appropriate model (such as a ceiling cassette). Additionally, provide the necessary space as shown in the product specification.

Need more information? Speak to the product manufacturer or supplier. 22 | HVAC&R Nation | www.airah.org.au/nation | July 2018

Installing multiple outdoor units.

Our wide product range ensures we have the missing piece for many situations. When it comes to air conditioning we know that every environment is unique, with its own specific requirements and challenges. That’s why our award-winning product range is so extensive, spanning from 2.6kW wall hung splits to 196kW packaged units and everything in between, which makes selecting the right choice easy. And whenever you do choose an ActronAir product, you can rest assured it comes with our well-earned reputation for energy efficient and reliable performance, backed up by the best service and support in the industry.

Wall Hung Split

Multi Split

Cassette

Low Profile Ducted

Split Ducted

Packaged

2.6kW – 8.2kW

5.2kW – 13.5kW

5.3kW – 13.75kW

7kW – 12.5kW

9kW – 71kW

15kW – 196kW

That’s better. That’s Actron.

July 2018 | www.airah.org.au/nation | HVAC&R Nation | 23

ARBS WRAP

THE JAMBOREE OF AC

A record number of visitors, a rebuilt venue and new exhibition features and spaces – ARBS 2018 was one to remember. What do you get when you put around 10,000 HVAC&R professionals into a room together? You get ARBS, the Aussie industry’s biggest event, held once every two years. This year ARBS was held in Sydney for the first time since 2010 – the long absence due to the International Conference Centre (ICC) in Darling Harbour being completely rebuilt. With a new venue, and many NSW punters hungry for an event on “home soil”, expectations were high. And ARBS 2018 didn’t disappoint. From May 8–10, the ICC was buzzing – a total of 9,754 visitors passed through the hall over the three days, a record attendance. “Being back in Sydney after eight years was very exciting,” says event organiser Sue Falke. “Seeing the amazing quality of the stands unfold and the extraordinary effort all the exhibitors put in each day was a definite highlight. Receiving the final attendance figures and learning that a record number of visitors attended over the three days – an increase of 10 per cent on 2016 – was proof not just of a successful event, but a direct marker on the growth of the HVAC&R and building services industry and the commitment it has to continuous education and skills sharing.”

“The atmosphere was great,” says Dio Zhao from Beijer Ref – one of the biggest exhibitors, with four ceiling LED screens above its stand. “Visitors were pleased to have a chat with our staff, look around our stand, and check out our displayed products and so on.” For Jessica Brander from Belimo, the highlight of ARBS was the big crowds. “We did feel an increase to our stands,” she says, “and the attendees were more industry-based.”

THE BEST OF THE BEST One of the highlights of every ARBS is the Awards dinner, where industry leaders, pioneers and up-andcomers are recognised. Jason Harrison, M.AIRAH, from Airmaster took home the Young Achiever award and summed it up pretty well.

Steve Smith, M.AIRAH, shares his wealth of experience at the “Modern Technician” session – one of many well-attended Speaker Series talks.

INDUSTRY PLAYERS The main exhibition hall was packed with more than 300 exhibitors large and small, all showing off their latest kit and services, giving demonstrations, and offering autograph and selfie opportunities with sports stars. Towards the end of the day we also saw plenty of hands-on demonstrations of refrigeration, as refreshing beverages were shared around, and the networking stepped up a gear. 24 | HVAC&R Nation | www.airah.org.au/nation | July 2018

“I feel very humbled and honoured,” he says. “Thank you to ARBS! I feel that this award is as much as a credit to these people as it is myself, due to the time that each person has invested in me and my development into the young professional I am today.” Jason also won applause for accepting MC Tony Squires’ challenge to execute a commando roll onto the stage when receiving his award. Back at the main event there were more attractions. A new initiative dubbed IBTech allowed punters to check out leading-edge devices and software. More traditional skills were also on display as the WorldSkills Australia National Refrigeration Competition was fought out. Patrick Brennan from South West Queensland grabbed the gold medal, Chris McNally from Brisbane scored silver and Matthew Cleave from Sydney brought home the bronze. We’ll have more on the WorldSkills competition in a coming issue of HVAC&R Nation. In the meantime, enjoy our ARBS gallery – you might well spot someone you know … n

ARBS WRAP Welcome to the show. AIRAH scored a plum position for its stand, right at the entrance.

Investigating the future of HVAC&R controls and maintenance – or just playing VR video games? Only visitors to the IBTech area will know for sure.

The Awards dinner was a highlight, although the musos ignored our requests for “Hot Stuff”, “Ice Ice Baby” and other HVAC&R-related classics.

Fujitsu General Australia scored the ARBS award for best large custom stand.

Look out for this bloke on the job – Patrick Brennan won the WorldSkills Refrigeration Competition.

Grab yer goodie bags! Apart from the big exhibitors, there were rows and rows of smaller companies showing off their wares.

ActronAir had a star roster at its stand, inlcuding UFC champion Robert Whittaker.

Victaulic Australia won best shell scheme stand, but we’re disappointed there was no prize awarded for best merch item. Next time!

July 2018 | www.airah.org.au/nation | HVAC&R Nation | 25

Around the Nation 1

AIR CHANGE BUYS DUNNAIR

Dunnac Pty Ltd, a wholly owned subsidiary of Air Change Pty Ltd, has acquired the Dunnair air conditioning business from Mechanical Air Supplies Pty Ltd. Dunnac will trade under the Dunnair banner and will continue to supply the full range of Dunnair air conditioning products to the HVAC industry nationally. Air Change general manager Shane Carmichael, M.AIRAH, says the acquisition will complement his company’s existing offering. “Air Change has traditionally offered unique and innovative products for niche applications,” he says. “Dunnair has an established range of products, and a brand familiar to the whole of Australia. This will be bolstered with Air Change’s technical expertise and support to provide quality and reliable solutions. And the acquisition provides us the opportunity to supply a much broader range of HVAC systems to better serve the needs of the industry.” There has been a lot of HVAC&R merger and acquisition activity lately, and Carmichael sees this as a positive sign. “I believe this kind of investment shows that our industry is in a strong position at the moment,” he says, “and I predict this will continue for the foreseeable future.” Go to www.airchange.com.au n

REECE CONFIRMS HEATCRAFT NZ PURCHASE

In more HVAC&R business news, Reece has officially taken ownership of Heatcraft’s New Zealand operations, after announcing the acquisition from Swedish company Beijer Ref at the end of March. Daniel Palumbo, Reece Group general manager of operations, says: “We’re excited to recently take ownership of Heatcraft’s operations in New Zealand and work with our new colleagues to continue providing leading HVAC&R products to our customers.”

The acquisition expands the Reece Group’s presence across the North and South Island from 11 to 18 locations. And it’s a move that the company has been wanting to make for some time. Reece Group CEO and managing director Peter Wilson says: “With a comprehensive product range, the acquisition of Heatcraft’s New Zealand operations will enable us to build on our solid base in the region and broaden our customer offering.” Go to www.reecegroup.com.au n

GET YOUR GREEN TICK

The Australian Refrigeration Council (ARC) is promoting its Green Scheme Accreditation – an initiative that identifies whether someone is qualified to work with natural and low global warming potential (GWP) refrigerants. “This is particularly important for manufacturers of plant and equipment, in all sectors, who are increasingly utilising natural and low-GWP refrigerants,” says ARC CEO Glenn Evans. “They will be the refrigerants of the future, and the future is already here. “If technicians are not properly trained and accredited to work with natural and low-GWP refrigerants, there are very real safety and product performance risks, which may lead to increased warranty claims,” Evans adds. “This is particularly important for equipment manufacturers. In the climate control sector, a product is only as good as its installation and maintenance, so the technician’s qualifications must be paramount – that’s where the Green Scheme Accreditation plays a significant role.” The ARC Green Scheme Accreditation program is a qualifications-based accreditation for refrigeration and air conditioning technicians working with natural and low-GWP refrigerants including hydrocarbons, CO2 (R744), ammonia and HFO 1234yf. Go to www.arcltd.org.au/green-scheme-accreditation n

26 | HVAC&R Nation | www.airah.org.au/nation | July 2018

PARALYMPIANS PUT FOCUS ON SAFETY

Insurance and care services provider icare has a new-look speakers program for the construction industry to drive down workplace injuries and help support a culture of workplace safety. Through the program, current and former Paralympians who have been affected by workplace injuries visit workplaces across the state to share their stories. Nigel Smith (pictured), an Australian Paralympic volleyball champion, lost his left leg at the age of 25 when it got caught in a chain conveyor on a heavy industry paint machine. He endured numerous operations and his leg was eventually amputated because of the accident. “All it took was a split second for my life to change forever,” Smith said. “It’s not only up to an employer to point out and reduce potential risks on the job – employees also need to be aware of and help prevent those risks. Safer workplaces are paramount for both employers and workers because they ensure that we all get home safely at night.” In the past 12 months, more than 9,000 people have been injured in workplace accidents within the construction industry in New South Wales. Go to www.icare.nsw.gov.au/icare-speakers-program n

GOOD, BETTER, WEST

Air diffusion specialist Quality Air Equipment (QAE) has expanded its operations in Western Australia, and is moving from its current office and warehouse in Wangara, Perth, to a new site in Belmont. “By consolidating our operations in one location, we will be in a better position to provide all our current and prospective customers with the full QAE product range of diffusers, grilles, registers, louvres, dampers, fans, sheet metal and flexible duct,” says a statement from the company.

Around the Nation 7

9 6

As part of the expansion, the QAE Group has acquired the assets of BJC Enterprises. “We can now offer customers the full range of QAE’s products as well as the products previously manufactured and supplied by BJC,” QAE says. “This includes manufactured grilles, commercial ductwork and flexible duct.” Go to www.qualityairequipment.com.au n

MITSUBISHI WINNERS

Mitsubishi Electric Australia recently held its annual dealer awards in the Brisbane CBD. Over 300 Mitsubishi Electric specialist dealers and VIPs from Japan attended the gala dinner, hosted by MC Andrew O’Keefe. Guests were entertained during the event by award-winning performances from salsa dancers and the Supergroup, featuring Richard Clapton, Joe Camilleri and Jon Stevens. Mitsubishi Electric Australia’s managing director Jeremy Needham says the night was a great success. “Mitsubishi Electric Australia recognises the hard work of our dealer network throughout the last 12 months,” he says. “It’s a time to reflect and celebrate the past achievements and talk about where the company is going in the future.” Elite Heating & Cooling in the ACT won the Room Air Conditioners award, Rite Price Heating & Cooling in SA took home the Mr Slim Light Commercial/ Commercial Package Air Conditioners prize (accepted by Andrew Knowles, pictured), and Paramount Airconditioning in Victoria scored the City Multi VRF Commercial Air Conditioning gong. Go to www.mitsubishielectric.com.au n

A NEW LINK IN THE CHAIN

Haier Air Conditioning and the CoolChain Group have announced that Haier products will now be available through CoolChain’s network of stores.

“Haier’s Australian customers now have greater access to its range of air conditioning products with the formation of a commercial partnership between Haier Air Conditioning and HVAC&R wholesalers, the CoolChain Group,” a statement says. “As CoolChain operates 17 branches Australia-wide, with outlets in major centres, it is now easier for the trade to view and buy Haier AC products. CoolChain branches will also carry Haier spare parts and accessories to suit job requirements.”

boilers. Typical efficiencies of 90 per cent and over are achieved compared with 70–80 per cent for conventional heaters.

The picture above shows CoolChain board members and executives from Fisher & Paykel and Haier Air Conditioning Australia and China at a meeting during ARBS 2018.

But A.G. Coombs also warns that installation and operation need to be carefully considered for trouble-free operation and to ensure the expected service life – hence the advisory note.

“We welcome the opportunity and are excited to work nationally with Haier to capture a share of the Australian domestic and commercial air conditioning market,” says CoolChain chairman Jeff Macmillan.

Go to www.agcoombs.com.au n

“Haier is recognised internationally as the world’s largest appliance manufacturer and CoolChain being Australia’s largest independent HVAC&R wholesaler is well placed to support Haier Air Conditioning nationally. We are looking forward to a long and mutually beneficial association and welcome clients existing and new to visit a CoolChain branch to view this exciting new product range.” Go to www.coolchain.net.au n

HOT TIPS FROM A.G. COOMBS

The efficiency of condensing water heaters or boilers has made them a popular choice for new installations and as plant replacements. Recognising this, A.G. Coombs has issued an advisory note providing advice on the design, selection, installation and maintenance of such units. “Condensing boilers achieve higher efficiency by using the waste heat in flue gases to pre-heat the water entering the boiler,” the note explains. “In doing this they also emit significantly less carbon monoxide and sulphur dioxide than comparable atmospheric

“Heat is recovered using extra-large heat exchangers within the boiler; these maximise heat transfer from the burner and recover useful heat which would normally be lost with the flue gases. Gas usage reductions of 15–30 per cent are possible compared to standard-type water heaters.”

GEELONG SCORES UNESCO STATUS

James Harrison, the founding father of refrigeration, has helped Geelong in Victoria earn the status of a UNESCO City of Design. Harrison is credited as the inventor of the mechanical refrigeration process for creating ice – he patented his ether vapour-compression system in 1855. But he is not the only historic designer who called Geelong home. It was also the birthplace of the Ford ute (designed by Lew Bandt and built in Geelong in 1934), the Hills Hoist (patented by Geelong blacksmith Gilbert Toyne in 1911), and most of Australia’s decimal currency coins (designed by Geelong goldsmith and jeweller Stuart Devlin). In the modern era, Geelong can boast the Carbon Nexus Centre at Waurn Ponds, the Centre for Advanced Engineering Training, and the Australian Future Fibres Research Innovation Centre. Geelong slots into the UNESCO list between Dundee in Scotland and Graz in Austria, and takes its place alongside global design hubs such as Shanghai, Montreal and Berlin. Go to en.unesco.org/creative-cities n

July 2018 | www.airah.org.au/nation | HVAC&R Nation | 27

Smoko with . . .

Name: Paul Dixon Company : Equal Air ng technician Occupation: Air conditioni Commissioning. industry do you work in? What par t of the HVAC &R &R industry? ut working in the HVAC What’s the bes t thing abo one is sick or has each other. Whenever any How everyone looks out for ne chips in a few word goes out and everyo had a bit of misfor tune, the nters . . . dollars. Oh, and the crazy pai rs. d in the industry? 23 yea How long have you worke – a step bit. a tool, more a tool accessory Favourite tool: Not exactly Clean holes every time. do you think you HVAC &R industry, what If you didn't work in the nate home brewer. sio pas a I’m ly a beer brewer, would be doing? Probab Lighter Side! t of HVAC &R Nation? The What’s your favourite par

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SAFETY FIRST

FLAMMABLE REFRIGERANTS Safety Guide

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of for the transport nt document is 2.1 This self-assessme a quantity of 250L of Division to such as vans and gas cylinders up in enclosed vehicles the Flammable gases be read in conjunction with wagons, and should guide. 2.1 Flammable Section 12 of this than 250L of Division Code for For quantities greater of the Australian Rail gases, the full requirements Goods by Road and ADG 7 Dangerous the Transport of reference must be made to the and (ADG 7) apply . for requirements

www.ai rah.org

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.au 67

www.airah .org.au

INDUST

3 DE 201

www.airah .org.au

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FREE ONLINE PUBLICATION AIRAH has released its Flammable Refrigerants Safety Guide, which is now available for FREE download. Believed to be the first of its kind in Australia, the guide was developed by independent organisations and stakeholders. AIRAH’s Flammable Refrigerants Safety Guide covers the health and safety risks involved in the design, manufacture, supply, installation, conversion, commissioning, operation, maintenance, decommissioning, dismantling and disposal of HVAC&R equipment and systems that contain a flammable refrigerant.

The guide is available to download FREE from www.airah.org.au Select the “Resources” tab then click “Technical Resources” on the drop-down menu.

28 | HVAC&R Nation | www.airah.org.au/nation | July 2018

AIRAH and Industry classifieds Site Visit – RMIT New Academic Street

EVENTS Newcastle Trade Night

AIRAH Trade Nights are a great opportunity to broaden your networks and see the HVAC&R industry's latest innovations. Date: July 4 Venue: West City Club Newcastle, NSW Cost: Free, upon registration at www.airah.org.au/events

Site Visit – Calvary Hospital

Join the AIRAH Tasmania division committee for a tour of the recently completed HVAC plant for the new operating theatres at Calvary Hospital. Date: July 11 Venue: Calvary Lenah Valley Hospital Hobart, Tas Cost: Free member-only event, register at www.airah.org.au/events

Darwin Trade Night

Join AIRAH at the Darwin Trade Night at Sky City Casino. Date: July 18 Venue: Sky City Casino Darwin, NT Cost: Free, upon registration at www.airah.org.au/events

Melbourne Trade Night

Join AIRAH for a visit to RMIT University’s redeveloped city campus. Date: July 18 Venue: Meet at Little Bang Espresso Café 394 Swanston St, Melbourne, Vic Cost: Free for members and students, $25 for non-members

NT – Members’ Golf Day

Date: July 19 Venue: Gardens Park Golf Links, Darwin

Resilience Forum 2018

The AIRAH Resilience Forum 2018 will showcase how industry can create a safer and more secure future through the implementation of practical design and construction measures that result in more resilient built environments and HVAC&R equipment; as well as by implementing best practice installation, operation and facilities management practices. Date: July 26 Venue: Aerial UTS Function Centre Level 7, Building 10 235 Jones St Ultimo, NSW Cost: $330 for members, $440 for non-members

Join AIRAH at the Melbourne Trade Night at Caulfield Racecourse. Date: August 2 Venue: Caulfield Racecourse Melbourne, Vic Cost: Free, upon registration at www.airah.org.au/events

Cairns Trade Night

Join AIRAH at the Cairns Trade Night at Pullman Reef Casino. Date: August 21 Venue: Pullman Reef Casino Cairns, Qld Cost: Free, upon registration at www.airah.org.au/events

The Solar Heating and Cooling Forum 2018

The Solar Heating and Cooling Forum 2018 will explore different aspects of solar heating and cooling, including: case studies and industry applications, policy and industry development, components and mechanisms, and innovations. Date: August 9 Venue: Mercure Brisbane Brisbane, Qld Cost: for early-bird registration (closes on July 6): $295 for members, $395 for non-members

TRAINING Essential Safety Measures

This course will teach you about the equipment and systems used for HVAC-based fire and smoke control in buildings. It is running around Australia in August. Cost: $595 for members, $795 for non-members

Victoria Date: August 14 Venue: Telstra Conference Centre 242 Exhibition Street Melbourne, Vic

Western Australia Date: August 21 Venue: Fraser Suites Perth 10 Adelaide Street Perth, WA

Queensland Date: August 28 Venue: Watermark Hotel 551 Wickham Terrace Spring Hill, Qld

New South Wales Date: August 30 Venue: Primus Hotel 339 Pitt Street Sydney, NSW For a full listing of events, go to www.airah.org.au/events

Free Classified Ads

Whether you are looking, selling, trading or tendering – HVAC&R Nation classifieds is the best way to spread the word! HVAC&R Nation is offering a free industry classified service! Send in your submissions, text only – no images or logos. Send your submissions to: mark.vender@airah.org.au or c/o AIRAH, Level 3, 1 Elizabeth St, Melbourne 3000.

AIRAH TRADE NIGHTS AIRAH Trade Nights are a great opportunity to broaden your networks and see the HVAC&R industry’s latest innovations. Whether you’re looking for the latest technology to improve your business, or extending your networks, there will be plenty on offer.

AIRAH Trade Nights are free to attend and open to everyone, but you must be registered to attend. July 4

Newcastle

NSW

August 21

Cairns

Qld

July 18

Darwin

August 23

Townsville

Qld

August 2

Melbourne

Vic

August 29

Bathurst

NSW

Free entry – Doors open at 4pm Exhibitors with the latest HVAC&R products and innovations. Drinks, food and more.

July 2018 | www.airah.org.au/nation | HVAC&R Nation | 29

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

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RUFFEST INSTALL EVER THE Shawn from Cairns spotted this at a customer’s house while repairing a split system. “Super-spoiled dog,” he says, “slightly over-capacity aircon!” n

EFRIGERATION OR PLUMBING? RAIRAH member James was called in to help with a cool room and found this not-so-cool piece of workmanship. n

EASY B“WeREATHE came across the attached AC filters, which were in a brand-new site,”

says Nick. “Only three months old and had never been changed. Full science project – yuck!” n

WITHOUT FLAIR FLARES “Thought I would send you a photo of what some installers think is OK to put on their flare joints – leak lock,” says Ray from Eight Mile Plains in Queensland. “Sad part is this is happening more and more. When we rang the installer he just said, ‘What else is it used for then?’ ” n

AIR DINKUM? FSometimes we honestly wonder if people set up their Lighter Side photos. We’ll give Rhys the benefit of the doubt on this one. “Found this absolute doozy in an apartment that was served by a swampy,” he says. “Complete with functional drain!” n

HAVE YOU COME ACROSS SOMETHING SCARY, UGLY OR JUST PLAIN FUNNY? If your entry is deemed the monthly winner, a 750ml 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

30 | HVAC&R Nation | www.airah.org.au/nation | July 2018

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July 2018 | www.airah.org.au/nation | HVAC&R Nation | 31

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