Variable Refrigerant Flow Systems (VRF or VRV) - Expert Commentary

HVAC Maintenance Vital As Businesses Reopen Post COVID-19
HVAC Maintenance Vital As Businesses Reopen Post COVID-19

In what can only be described as a very turbulent year, many businesses have had to shut their doors and have all but forgotten about the general upkeep of their sites. With priorities shifted to keeping companies afloat and staff employed, maintenance and servicing has taken a backseat, and many systems will be deteriorating unnoticed. It goes without saying that one of the first tasks that employers will have to tackle when returning to work is a deep clean. As we are still in the throes of a pandemic, a clean and disinfected workplace is the number one priority that needs to be ensured, before any staff can be welcomed back to work. This should be closely followed by maintenance of the site’s equipment. Importance of regular HVAC maintenance Regular HVAC maintenance is extremely important as it keeps systems performing efficiently and effectively Regular HVAC maintenance is extremely important as it keeps systems performing efficiently and effectively. The nature of HVAC maintenance does change depending on the time of year, and with some sites being shut for months and through different seasons, managers will need to review their current equipment to ensure it is compliant and working correctly as soon as possible as signs of normality start returning and facilities begin to reopen. While warehouses and factories may have still been operating in some capacity over the last 12 months, many office buildings have seen little to no employees for more than a year in some cases, therefore, risking deterioration and even damage to their systems going unnoticed and untreated. But with so many pieces of equipment at each site, it is often hard to know where to start and what to prioritize. Following HVAC manufacturer’s recommendations In order for businesses to keep functioning as best as they can and to avoid any more disruption, those in charge of maintenance and servicing need to be educated on how the conditions of a system affects the type of work it needs. Manufacturer’s recommendations should also be taken into account. To help define what these are and how to approach them, mechanical and electrical engineers recommend: The coils and pipes in HVAC equipment that are responsible for heat transfer are checked regularly, because if the equipment gets dirty, it won’t transfer heat and energy as well. Checking controls annually to ensure that the HVAC system is running properly, as control calibration can alter. By scheduling regular check-ups, accurate operation is maintained. Maintaining equipment with fans quarterly to maximize longevity. Three key areas include monitoring the impellers, belts and bearings for any dirt, wear and tear, friction or erosion. Keeping an eye on filters, as when they are clogged, it increases the pressure drop in a system, which makes fans work harder to maintain the same airflow. A quarterly clean is usually sufficient for most filters. This is also true of strainers in systems. Optimizing HVAC and electrical equipment With spring now upon us, businesses need to optimize their HVAC and electrical equipment for maximum efficiency With spring now upon us, businesses need to optimize their HVAC and electrical equipment for maximum efficiency. This includes reviewing the sequence of operations for a morning warm up and cool down. However, it’s important to remember that because of prolonged closures over the last 12 months, autumn and winter checks, and in some cases, even summer checks were not able to be carried out in 2020, so before the spring work begins, backdating the maintenance is a good place to start. Ensuring buildings’ energy efficiency With the help of experts, HVAC maintenance doesn’t have to be time-consuming and overwhelming, but it’s a critical part of maintaining an energy-efficient building that is both comfortable and reliable. With regular servicing and some basic knowledge of what is required, sites can maintain optimum efficiency all year round. Noise complaints can also be an issue, if HVAC maintenance isn’t carried out regularly. Spring is a good time for businesses to perform services on their equipment, prior to the summer months starting and should be used to ensure that condenser coils and air handler filters are both clean. The dirtier the equipment, the noisier and less efficient it becomes, which is bad news for any business. Preparing buildings for staff returning to work When a building is returning to normal occupancy after a lengthy closure, additional checks must be considered before reopening is discussed. When a building is initially mothballed, it must be prepared for long term vacancy, but many businesses will not have had this opportunity before the national lockdown, which basically entails that these checks will not have been carried out. After a building becomes unoccupied, it is not the case that maintenance activity should also stop After a building becomes unoccupied, it is not the case that maintenance activity should also stop. At the very least, the frequency of existing planned maintenance will change, but in some cases, more maintenance tasks are required in order to keep the site ticking over. This includes flushing of water systems, Legionella testing and insurance inspections to keep the property functional and compliant. Countering health and safety issues  As the COVID-19 lockdown restrictions are lifted across the United Kingdom and many businesses are gradually reopening, it will present health and safety problems that have not been faced before and will very likely see a surge in services and maintenance being required. With this in mind, it is vital that maintenance becomes a priority as normal service is resumed to not only ensure efficiency, but also to make sure that no employee or visitor to a site is put in danger. Emerging from a surreal 12 months, there is no doubt that companies will still face challenges, so it is crucial that avoidable maintenance problems do not become one of them, so don’t delay in booking routine checks.  

Overcoming Engineering Challenges In Riser Design
Overcoming Engineering Challenges In Riser Design

How grooved solutions have been making contractors and engineers reimagine the way they construct risers in vertical buildings? Enter into the right pub, or head to a city’s museum or town hall, and you can often find a picture of how the surrounding area used to look. An image from twenty years ago and the difference isn’t too vast. Fifty years back and there’s a definite change. A picture from over a hundred years ago and it’s practically unrecognizable. And what’s the common theme running through these images? Cities are getting taller. As more people migrated to urban areas, developers saw the need to go higher. But with this comes its own unique set of challenges. How can the safety of ground floor be transferred to, in the most extreme case, level 163? Grooved mechanical pipe joining solutions When it comes to high-rise buildings, there are a number of potential challenges for a piping engineer To find out how grooved mechanical pipe joining solutions are helping developers & engineers go higher, we spoke to Matthew Strohm, Director of Product Development (Piping System Design) at Victaulic. When it comes to high-rise buildings, there are a number of potential challenges that a piping engineer will need to take into consideration, most of which relate to thermal movement and the resulting forces on the building. Other issues such as seismic activity and building creep (the natural movement of a building due to settlement) also need to be taken into account. Compensating for thermal expansion and contraction Specifically related to piping systems and subsequently, pipe joining solutions, is the unique problem of having to compensate for thermal expansion and contraction, while at the same time, accommodating for higher pressure. Change in pipe diameter is not an uncommon concern for engineers, however, providing a solution which could operate at a pressure gauge of 25 bars, or the fluctuating temperature of water, presents its own challenges. It’s with these issues in mind that engineers choose their joining solutions, which is why these are the very criteria we set our Victaulic pipe joining solutions against. Grooved vs. Traditional Pipe Joining For decades, the traditional solutions for joining pipes have been welding, threading or flanging. These are good solutions to choose from, but there is a distinct lack of flexibility in a solution that fuses or flanges system components together. This is where flexible grooved couplings come in. They are solutions that allow controlled linear and angular movement at each joint to accommodate not only for thermal expansion and contraction, but also building sway and creep. So how do flexible grooved couplings manage this? It’s essentially down to the design of their components. The dimensions of the pipe coupling housing key is narrower than the pipe groove, allowing room for movement. Furthermore, the width of the pipe coupling housing allows for pipe end separation, which in turn allows the grooved pipe joint to accommodate movement. Benefits of Grooved couplings There are many benefits of grooved couplings, with space-saving being a key advantage on projects, both large and small There are many benefits of grooved couplings, with space-saving being a key advantage on projects, both large and small. As many project managers and engineers know, saving on space can be the key to unlocking extra value above initial planning. Additionally, grooved couplings are perfectly placed to accommodate for piping movement, whereas welded joints that in their very nature are designed to be fixed in place, need to have an area of space to allow for a welded expansion loop or alternatively, enough space to allow the star-pattern tightening of a flanged flex connector. Saving time, money and labor Besides the savings on space, grooved connections offer contractors savings in three key areas: time, money and labor. The installation-ready design of Victaulic’s grooved couplings allow for an easier installation, meaning a process which might take 30 minutes through a welded solution for instance, can now take just five minutes. As any contractor will testify to, this is valuable time that can be used for other parts of the project. With a reduction in time comes savings in cost and labor. Naturally, less labor is used for the same job and in the case of grooved couplings, less skilled labor is required (in comparison to the high skill level needed for welded joints). It’s these aspects that will ultimately deliver contractors with valuable project savings. Grooved connections offer savings in three key areas: time, money and labor Mechanical riser solutions There are 3 ways to accommodate for thermal movement within risers using a grooved mechanical system: The first method is called top of riser free-floating method and involves installing rigid couplings on the riser and two flexible couplings on the horizontal adjacent piping at the top of the riser, which can reduce the need for riser clamps or other structural during installation and allows the system to move freely within the design tolerances. The second method involves working with grooved expansion loops that help to save up as much as 2/3rd of the size of welded U-shaped expansion loops and avoids forced welded pipe deflection. While welded expansion loops require eight welded joints to assemble, the forces exerted on the joint are far greater than those applied on a grooved expansion loop, and generate greater stress, which ultimately requires larger anchors and guides in order to direct the movement. The third method is working with grooved expansion joints instead of traditional in-line expansion joints, which typically have wear parts and manufacturer-recommended maintenance cycles of five years, which also poses problems due to riser accessibility once the construction is complete. Grooved expansion joints like the Victaulic Style 155 are maintenance-free for the life of the system. Importance of anchors In a system using only flexible joints, risers are installed with anchors at the top and bottom and the piping guided every other length to prevent angular deflection at the joints within the piping run. Anchors distribute the movement forces across the structure and also provide the important task of directing pipe movement. At the pipe anchor location, there will be no differential movement between the piping and the building structure, which forces the pipe to thermally expand or contract from that location. This allows the design engineer to control how and where the movement in a system occurs and to provide the best solution to accommodate that movement. A10 Grooved Riser Anchors upgraded A good manufacturer will always listen to customer demand, especially in an evolving market A good manufacturer will always listen to customer demand, especially in an evolving market. Off the back of strong feedback from contractors, Victaulic recently upgraded its A10 Grooved Riser Anchors to a standard product. With the primary functions of carrying the weights and forces that act downward to the base of the riser and connecting the riser to the rest of the structure, the anchor has been providing sturdy support for some of the tallest buildings around the world. Future trends for high-rise buildings One trend already taking place, and I expect to continue, is contractors bringing riser experts into the project at an earlier stage. It just seems to make logistical sense to operate in this fashion. it’s a more efficient use of time to collaborate early in the process. I believe contractors and engineers will seek assistance from companies such as us to help design blueprints together, working in tandem to produce the right solution. Vertical buildings are on the rise. For generations, people have been moving to urban areas, putting greater demand on housing residents and employees. Through the use of grooved coupling solutions as an alternative to traditional methods, contractors can benefit from greater flexibility, reliability, ease of installation and ultimately and most importantly, speed of the installation process.

Using Silicone To Improve HVAC Insulation & Energy Efficiency
Using Silicone To Improve HVAC Insulation & Energy Efficiency

The modern technological world is filled with ‘extrusions’. They are all around us, in the form of small and not-so-small cross sections. The function of an extrusion is to form seals between components of complex machinery and keep them functional. And, depending on the ‘type’ used, they can make a big difference to how a machine operates. Some of the most desirable types of extrusion — and especially for use in HVAC systems — are those made from silicone. Silicone, which is a type of rubber, has a robust set of properties. For one, silicone can withstand extreme temperatures, both high and low. Semi-Exterior environments Ranging from -60°C to temperatures exceeding 200°C. (And there are even higher grades that can be manufactured to withstand temperatures well above 200°C.) Ideal for HVAC units that work round the clock to keep large numbers of people in large buildings comfortable in summer and winter conditions. In addition to this, silicone is also one of the more resistant properties to the constant vibrations of working machinery. It can be difficult to locate the source of the problem if a tiny extrusion has dislodged. Vibration-resistant properties make silicone extrusions less likely to disengage or fall out of place, therefore minimizing the need for costly repairs. Finally, silicone is also more durable than most other materials when it comes to exterior or semi-exterior environments, such as that of rain or ultraviolet light. Protecting electrical components Silicone is useful in HVAC systems because it offers enhanced sealing and compression protections As a result of this favorability, there is already a considerable number of different types of silicone extrusions that can be found in a lot of HVAC systems. These include HVAC sealing gaskets, hatch seals and vibration isolation pads. But also silicone sponges, which act as a protective layer of thermal insulation. As well as providing thermal insulation, silicone sponges can double-up as a form of acoustic insulation, with considerable noise reduction and anti-squeal properties. Silicone enclosure gaskets protect electrical components, and environmental seals — as the name suggests — help to keep everything protected from the sometimes harsh elements of the environment outside. Silicone is useful in HVAC systems because it offers enhanced sealing and compression protections over most other materials. Closed cell structure On a material level, silicone has a ‘closed cell structure’, which helps to keep out moisture ingress, along with water and dust. The combination of a closed cell structure, along with sealing and compression benefits, makes silicone ideal for exterior seals and gaskets in and around HVAC systems. The softer grades of Silicone have an excellent memory and low stress relaxation, which in turn helps to prevent common faults with HVAC systems — usually caused by gasket failures made from other materials that soften and compress inaccurately. The low stress relaxation properties require minimal force on behalf of the engineers sealing the enclosures, while the memory-properties of the silicone allow it to conform to awkward shapes and gaps of various widths. Manufacturing HVAC systems proactively with silicone in mind can allow more design flexibility on behalf of the engineers. Inevitable rapid movements General purpose solid silicone or silicone sponge is suitable for many HVAC applications And, as mentioned above, vibration isolation pads work as dampers to protect against the inevitable rapid movements of the systems as they power along. But also to help withstand the vibrations of HVAC units on transport systems, such as buses and trains, which naturally vibrate as they run over imperfections on rail and road tracks. As it happens, general purpose solid silicone or silicone sponge is suitable for many HVAC applications, not just those discussed above. The designs of the extrusions would be different, reflective of their function, but the material would be the same. In some instances, customers may also require a flame retardant silicone — certified to UL94 specifications — in order to meet safety standards in certain situations or environments. Great temperature ranges For all its material advantages, silicone is generally more expensive than the other types of material rubber that are used to manufacture extrusions, such as ethylene propylene diene monomer (EPDM). And while other materials do of course have stand-out benefits of their own — EPDM for example is more hard-wearing than silicone — silicone is still often the extrusion ‘type’ of choice because of its ability to withstand great temperature ranges. This is very important for heating and air conditioning systems. Because some of the most common factors that cause HVAC systems to break down are as a result of seal and gasket failure, which can come about as a result of an overheating unit. Very cold environment Chances of a unit overheating can be just as likely — in fact perhaps more so — where the system has to operate in a very cold environment. With the threat of climate change etched more than ever into the public discussion, we can predict that there will be a steady increase in the amount that this material is used to make up the HVAC seals. And not just because, as temperatures continue to increase and summers get hotter and more prolonged, there will be an increased demand for them. Effective public relations It is no secret that HVAC systems can be relatively expensive to run It will become a matter of effective public relations for managers, building regulators and transport officers to make sure that the equipment they are using — and making — is ‘green’. By using the right materials that help conserve energy and increase efficiency, this will not only sit right with the general public, it should also be more economical, too. It is no secret that HVAC systems can be relatively expensive to run. Minimizing wastage, and the time spent on call outs and repairs will make a notable difference. Of course there are many other ways to also set about making air conditioning and heating units more efficient. Using seals or gaskets made from silicone is just one small piece of the puzzle. But utilizing them will almost certainly be more beneficial than you might imagine. And anything that is a step in the right direction is a welcome change.

Latest Bryant Heating & Cooling Systems news

New Bryant Home App Provides Enhanced User Experience for Remote Connectivity to Evolution System
New Bryant Home App Provides Enhanced User Experience for Remote Connectivity to Evolution System

Bryant has launched the new Bryant Home app, which provides homeowners with an improved experience managing their Evolution™ System. This replacement for the MyEvolution Connex app, which is available now in the Apple® App Store® and Google Play® store, provides an enhanced homeowner experience, improved functionality and increased connectivity performance between the mobile device and home comfort system.   Bryant, a pioneering supplier of heating, ventilating, and air conditioning (HVAC) equipment, is a part of Carrier Global Corporation, the pioneering global provider of healthy, safe and sustainable building and cold chain solutions. While the Bryant Home app has a new look and improved performance, it still includes many of the features and benefits homeowners were accustomed to with the previous MyEvolution Connex app. Homeowners will be able to control their entire advanced home comfort system to precisely manage the temperature, humidity and equipment efficiency.1 In addition, homeowners will be able to learn more about the outdoor air quality around their home, including the air quality index and the pollutant levels in the atmosphere. Bryant Home app The new Bryant Home app runs on a Carrier IO platform, which provides a solid backend and cloud platform to build robust IoT applications. This app represents the latest step in Carrier’s digital transformation journey as its residential business reinvents its holistic digital footprint. “We’re proud to introduce the Bryant Home app to residential customers,” said Gundeep Singh, Executive Director, Digital and Analytics, NA Residential & Light Commercial, Carrier.   “Homeowners will enjoy the enhanced performance that better allows them to conveniently manage their home comfort settings from anywhere. This is the next progression in our digital transformation and we look forward to offering homeowners a new level of functionality as we continue to add new features and product compatibility.”

Bryant Heating & Cooling Systems Announces Evolution Extreme 26 Air Conditioner And Evolution Extreme 24 Heat Pump
Bryant Heating & Cooling Systems Announces Evolution Extreme 26 Air Conditioner And Evolution Extreme 24 Heat Pump

Bryant Heating & Cooling Systems launched the latest additions to its tier Evolution™ series with the Evolution Extreme 26 air conditioner (Model 186CNV) and Evolution Extreme 24 heat pump (Model 284ANV). Both products showcase a number of features performance, which includes numerous technological advancements with 12 patents pending. Bluetooth® diagnostic information Bryant, a supplier of heating, ventilating and air-conditioning (HVAC) equipment, is a part of Carrier, a global provider of innovative HVAC, refrigeration, fire, security and building automation technologies. Bryant also offers online troubleshooting and training modules, and virtual reality The Evolution Extreme 26 and 24 offer a number of enhancements designed with technicians in mind. Bluetooth® technology is available on the outdoor unit, making it unnecessary to access outdoor unit diagnostic information inside the home. Over-the-air software updates are available and technicians can assess over 130 diagnostic points. Sound output as low as 51 dB Plus, installations can use up to 250 equivalent feet of refrigerant line length, features two-wire installation, and the units are self-configuring and Evolution™ Zoning System-capable. Bryant also offers online troubleshooting and training modules, and virtual reality, 3D simulation training is available. Dehumidification can remove up to 70% more moisture per day than a single-stage system For most sizes, the Evolution Extreme 26 offers ratings for a ducted system at up to 26.0 SEER and 16.5 EER; while the Evolution Extreme 24 heat pump offers the in-class ratings at up to 24.0 SEER, 15.0 EER and 13.0 HSPF. Furthermore, both the Evolution Extreme 26 and 24 tout quiet operation with sound output as low as 51 dB. Ducted heat pump with a variable-speed The Evolution Extreme 26 and 24 include enhanced dehumidification and can remove up to 70% more moisture per day than a single-stage system. Plus, both units feature a variable-speed capacity operating range down to 25% in 1% increments and provide high-ambient cooling operation with full power up to 125 F. An Evolution™ air purifier will be included with the purchase of every Evolution Extreme 26 and 244 The Evolution Extreme 24 also offers heating operation to minus 15 F. In addition, it is has a ducted heat pump with a variable-speed, 5-ton unit that can achieve 13.0 EER and features the addition of vapor-injection technology. “We’re confident that homeowners will appreciate the features and benefits that are realized in our most ambitious development project to date. We’re also pleased to introduce enhanced installation and serviceability to our dealers, as we know that these improvements will make their lives easier,” said Todd Nolte, senior director, product and brand marketing, HVAC-Residential, Carrier. “The Evolution Extreme 26 and 24 are a true testament to the rigorous research and development that went into this project and we’re proud to be able to provide customers with such advantages.” Evolution™ air purifier destroys 99% germs and viruses In addition, an Evolution™ air purifier will be included with the purchase of every Evolution Extreme 26 and 244. The Evolution air purifier works silently in-line with the HVAC system and can improve indoor air quality. It uses Captures & Kills™ technology to trap up to 95% of particles, then uses an electrical charge to kill or inactivate up to 99% of germs and viruses. With every cycle of air that passes through this patented air purifying system, pollen, animal dander, bacteria and other pollutants are trapped and held tightly to the filter. An electrical charge then bursts the cell walls of pathogens it comes in contact with.

Bryant Heating And Cooling Systems Names Air Tech Heating As Dealer Of The Year 2019
Bryant Heating And Cooling Systems Names Air Tech Heating As Dealer Of The Year 2019

During the recent Bryant Dealer Rally, the company’s annual meeting where its top dealers are honored, Air Tech Heating, Inc. of Fond du Lac, Wisconsin was named Bryant Dealer of the Year, the highest honor a Bryant dealer can receive. Each year, this award recognizes the company whose hard work, expertise and business acumen have helped them to stand out as a leader in the industry. Bryant, a national supplier of heating, ventilating and air-conditioning (HVAC) equipment, is a part of Carrier, a global provider of innovative HVAC, refrigeration, fire, security and building automation technologies. “We’re both honored and humbled to be selected as the 2019 Bryant Dealer of the Year,” said Dan Price, owner, Air Tech Heating, Inc. “I’m incredibly proud of the entire team at Air Tech and I appreciate being recognized for doing business our way, with honesty and integrity.” Bryant Factory Authorized Dealer “We’re proud to be a Bryant Factory Authorized Dealer and have the support of such a great company. I’m also grateful for the amazing relationships we’ve built with both Bryant and our distributor, Auer Steel, over the course of my 22 years owning the business.” Dan and his team serve as ideal examples for other Bryant dealers of how to run a successful business" Founded in 1997, Air Tech Heating, Inc. has become known as the “Best Heating & Air Conditioning Company in the Fond du Lac Area” for ten straight years by Gannett Readers’ Choice. In 2018, Price’s son, Jim, and his wife, Sarah, became co-owners of Air Tech Heating, Inc. ensuring that it will remain a fixture in the community for years to come. It’s even more fitting that Air Tech Heating, Inc. was selected as the 2019 Bryant Dealer of the Year, as Price retired shortly after the Dealer Rally. Indoor air quality equipment sales “Bryant dealers continue to help set the standard in our industry,” said Matthew Pine, president, Residential HVAC, Bryant. “Our 2019 Dealer of the Year, Air Tech Heating, Inc. is an exemplary organization and has risen to the top among the very best in our elite group of dealers. Dan and his team serve as ideal examples for other Bryant dealers of how to run a successful business and do ‘Whatever It Takes’ to care for our customers.” Bryant selected its 2019 Dealer of the Year from 22 Medal of Excellence winners, comprised of Bryant Factory Authorized Dealers from throughout North America. The candidates were judged on overall sales growth, high-efficiency and indoor air quality equipment sales, customer satisfaction and participation in dealer programs and promotions. Medal of Excellence Winners The 2019 Medal of Excellence Winners include: Affordable Heating and Air Conditioning, Inc. - Cudahy, Wisconsin AGS HVAC Services - Westport, Massachusetts Air Tech Heating, Inc. - Fond du Lac, Wisconsin Bennett Heating and Air – Purvis, Mississippi Bob’s Heating & Air Conditioning - Woodinville, Washington Chadds Ford Climate Control - Chadds Ford Chapman Heating | Air Conditioning | Plumbing - Indianapolis, Indiana Chris Mechanical Services, Inc. - West Chicago, Illinois Cosby Heating - Mount Vernon, Ohio Dave’s Heating and Air - Lincoln, Nebraska Design Air, Inc. - Missoula, Montana Evergreen Gas, Inc. - Sherwood, Oregon Family Heating and Air - Pensacola, Florida Federal Elite Heating & Cooling, Inc. - Dresden, Ohio Fort Collins Heating and Air - Fort Collins, Colorado GAC Services - Gaithersburg, Maryland Gainesville Mechanical, Inc. - Gainesville, Georgia Haley Comfort Systems - Rochester, Minnesota IERNA’S Heating & Cooling, Inc. - Lutz, Florida Precision Heating & Air Conditioning - Twin Falls, Idaho Regal, Inc. - York, Pennsylvania Waychoffs Heating & Air Conditioning - Jacksonville, Florida In addition to the Dealer of the Year award, Bryant named Peck & Weis Heating, Cooling, Plumbing & Electric of Lake Geneva, Wisconsin as this year’s recipient of the Charles Bryant Award. The Charles Bryant Award, named in honor of the company’s founder, recognizes a loyal Bryant Factory Authorized Dealer (FAD) that epitomizes the characteristics of Charles Bryant, including professionalism, quality, reliability and community spirit.

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