Taking the Temperature on HVACR

Host Jamie Kitchen welcomes product expert Christina Kjar to discuss how individual room controls are transforming the way we heat our homes and buildings. They dive into the differences between mechanical and electronic thermostatic radiator valves, the growing role of underfloor heating, and the real-world benefits of balanced, efficient systems. Discover why personalized comfort isn’t just a luxury — it’s the key to smarter, more sustainable heating. 

Host Jamie Kitchen is joined by regulars Jorg and John to unpack how HVACR changes when the system moves. From vibration, oil management, and compressor mounting to multi-temp trailers, EPRs, and face-seal serviceability, they tour trucks, buses, trains, and reefer containers (yes, how ships power them). You’ll hear diesel vs. battery drives, why hoses mean more filter-drier swaps, and practical do’s & don’ts for manifolded racks—a lively, nerdy ride through the cold chain. 

On this episode of Taking the Temperature on HVACR, host Jamie Kitchen welcomes heat exchanger expert Mark Davydov for a deep dive into one of the industry’s most essential technologies. From the surprising role of plate heat exchangers in data centers and district heating to their everyday impact in breweries and beyond, Mark shares fascinating stories, lessons learned, and practical insights. Whether you’re an HVACR pro or just curious about the hidden tech that keeps our world running, this conversation delivers both expertise and entertainment. 

In this episode of "Taking the Temperature on HVAC," Jamie, John, and Jorg explore the different types of compressors offered by Danfoss, including reciprocating, scroll, screw, and Turbocor compressors. They discuss the operational differences between these compressors, such as the pulsation in reciprocating compressors versus the smooth operation of scroll compressors, and the factors influencing compressor selection, like efficiency, temperature range, and application needs. The hosts emphasize that choosing the right compressor depends on the specific system requirements, from low-temperature refrigeration to high-capacity heat pumps, providing valuable insights for HVAC professionals looking to optimize their systems. 

In this episode of Taking the Temperature on HVAC, host Jamie Kitchen is joined by John Broughton and Jorg Saar to explore the critical role of pressure regulators in refrigeration systems. They discuss how condenser, evaporator, and case pressure regulators help maintain system stability across varying loads and ambient conditions, ensuring proper pressure differentials for metering devices and protecting compressors from overload. The conversation covers common misconceptions, design considerations like receiver sizing and hot gas bypass, and compares the use of crankcase pressure regulators versus MOP valves. Emphasizing the importance of system knowledge, the episode highlights how these components...

Welcome to "Taking the Temperature on HVACR," hosted by Jamie Kitchen. In this insightful episode, Jamie is joined by regular guests, Jorg Saar and John Broughton, as they delve into the intricate relationship between temperature and pressure within refrigeration systems. The discussion covers the fundamentals of the refrigeration cycle, emphasizing how temperature differences drive heat transfer, and the role of components like evaporators and compressors. Explore the fascinating dynamics of vapor compression and learn how thermodynamics governs the operation of HVAC systems. Whether you're an industry professional or simply curious about how your fridge works, this episode offers valuable...

While the space temperature in a refrigerated space may be used to control the refrigeration system, there is a lot more going on that we must also take control of. 

The thermostat initiates a pump down cycle to control/limit refrigerant migration to protect the compressor and enable defrost to occur more rapidly. 

Control over the temperature, humidity, velocity and direction of air leaving the unit cooler must be maintained to ensure that product is not dried out or frozen even when stored in temperatures above freezing. 

How product is placed within the coo...

In this episode of Taking the Temperature on HVACR, host Jamie Kitchen welcomes special guest Maiken Hansen to explore the world of hydronic balancing. They discuss how unbalanced heating systems in multi-family buildings can lead to cold tenants, noisy radiators, and high energy bills—and how dynamic balancing solutions can improve comfort, reduce complaints, and cut energy costs by up to 25%. Whether you're a facility manager, building owner, or just curious about smarter heating solutions, this episode dives into the challenges and benefits of efficient hydronic balancing. 

Join Jamie and John in this episode of Taking the Temperature on HVAC-R as they tackle noise and vibration in commercial refrigeration and air conditioning systems. Discover the causes, impacts, and practical solutions to enhance acoustic performance and system efficiency. Perfect for cooling installers looking to optimize their installations and meet customer expectations!

In this episode of Taking the Temperature on HVAC-R, Jamie, John, and Jörg take you on a deep dive into the world of pressure controls in HVAC systems. Uncover the key differences between safety and control functions, explore practical tips for optimizing system efficiency, and gain insights into real-world applications in refrigeration and beyond. 

Join host Jamie Kitchen and experts Jörg and Stefan as they dive into innovative alternatives to the conventional vapor compression cycle, examining their principles, advantages, disadvantages, and market potential. From thermoelectric and absorption cooling to emerging technologies like magnetic and thermoacoustic systems, discover the advancements that could reshape the HVAC industry.

Join Jamie Kitchen in part two of our Taking the Temperature on HVAC-R series as he explores more highlights from Chillventa 2024. This year's topic on the Danfoss booth at Chillventa was “Shift your perspective on the cold chain,” showcasing how solutions enhance efficiency and sustainability from farm to table. In this Episode Jamie dives into insightful conversations with Danfoss experts Jörg, Mathieu, and Julian.

Discover key discussions about cold rooms, commercial heat pumps, chillers, and the rise of digital services in refrigeration.

Join Jamie Kitchen as he explores the latest trends from Chillventa, the top exhibition for refrigeration technology. This year's topic on the Danfoss booth at Chillventa was “Shift your perspective on the cold chain,” showcasing how solutions enhance efficiency and sustainability from farm to table. Jamie speaks with Danfoss expert Anatoly on the highlights of food processing and cold storage, and Gabriele de Bona on supermarket innovations. Special guest Trevor Matthews, the Refrigeration Mentor, also shares insights from his visit to the Danfoss booth.

"Stay tuned for the next part of Jamie Kitchen's Chillventa journey!  Jamie continues his d...

Jamie Kitchen and his guests explore the essential role of the cold chain in preserving and transporting food from farm to table. They discuss the refrigeration technology behind it, its global impact on reducing food waste, and challenges in different regions. Using examples like milk, fruits, and vegetables, they explain the importance of precise temperature and humidity control for maintaining food quality.

The episode also highlights the importance of technicians in keeping the cold chain running, ensuring fresh food distribution worldwide.

Join host Jamie Kitchen and guests John Broughton and Jörg Saar as they dive into the world of heat pumps. Explore the basics, technological advancements, different types, and practical applications of heat pumps in the US and EU.

Learn about installation best practices and the latest market trends in this informative and engaging discussion.

Join Jamie Kitchen, John Broughton and Jörg Saar as they explore practical steps to achieve energy savings in commercial refrigeration through decarbonization. This episode covers the benefits of using Thermostatic Expansion Valves (TXVs) over capillary tubes, the advantages of Electronic Expansion Valves (EEVs), optimal superheat adjustment, and essential maintenance tips for improving system efficiency. Learn how proper system design, installation, and upkeep can significantly reduce energy consumption and enhance the longevity of refrigeration equipment.

In this episode, our new host Jamie Kitchen is joined by Gary McCreadie from HVAC Know It All, to look at how to avoid the dreaded call backs that occur under warranty. Call backs waste time and money and can take a serious toll on your reputation. So, how can you avoid them? The good news is the answers to that question are relatively easy to implement, don’t require a lot of time and aren’t exactly rocket science. The secret is in the planning. Tune in for a great discussion that will cover the what, why and how...

The crew is here to share their personal and professional opinions about residential heating, air quality, the future of HVAC, and what it meant to them from a young age.

👋  Not to be missed, we’re also saying farewell.

After 46 years at Danfoss, the team takes a moment to wish Jens a happy retirement and talk about an all-new podcast coming from Danfoss. Join us for this final episode of Chilling with Jens.

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We’re recording this episode from Nordborg, Denmark, where Jens stopped by Danfoss' Application Development Center.

He is there to explore the latest advanced technologies, like dual refrigeration systems, solar panels, and integration between electrical grid and district heating systems.

What will you learn? This episode is all about energy recovery, efficiency, smarter cooling and heating, and staying ahead of the curve. 

Tune in now.

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Energy efficiency is a game that must be won at every step of the journey, from choosing the right equipment to customers’ daily use. 

Together with experts John and Jörg, Jens is finding where energy efficiency is gained and lost at every step, from equipment choice to refrigerant selection, condenser and evaporator considerations, user operation, and more. 

 If you want customers to get the most from their systems, this episode is a must-listen. 

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Next in our two-part commissioning series, is there a job for you to do when modern electronic controllers like Danfoss’ Optima Plus range come with advanced settings? 

 Yes. Find out why manual input is crucial for electric controllers, and how to get it right based on your specific application. 

We’ll also take you through the system checks you should be doing during commissioning, from verifying operational temperatures and cycling, to checking oil levels in compressors. 

Press play, join the conversation, and be sure to follow us for the latest Chilling with Jens episodes...

In this episode, we're looking at commissioning and the critical role of refrigerant charging. Jens and the team lay out strategies to master the process so that you and your system operate flawlessly.

You’ll hear about:

Press play, join the conversation, and pay attention to minute 16, where we reveal our simple tip for calculating the charge!

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PFAS is a man-made chemical used since the 1940s, but it has been damaging our health and the planet from day one.

Now that EU regulation points a finger at refrigerants, we have a few questions.

Are we certain that PFAS is interlinked with refrigerants? Is it actively damaging our health and the planet? And what are regulators planning to do about it?

We don’t have all the answers, but it’s time to ask some big questions.

Tune in today.

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Part of staying ahead is knowing what’s coming, especially when it comes to regulation.

That's why we re-recorded this special episode of #ChillingwithJens, to bring you updates from the EU's significant changes to F-Gas regulation. You'll learn about:

Hit play, then join the conversation by sharing your reflections on Facebook, LinkedIn or Instagram. What surprised you about the new changes?

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If every component matters, you need to choose right every time. In this episode, Jens and the crew share their step-by-step guide for selecting components and other tips.

Key among them,

Press play and tag us on social media to share your favorite show moment. (Ours was... the part about carrots.)

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CO2 is the way forward, but it’s not always the answer. And there’s a lot to know.

By popular demand, the Chilling with Jens podcast team gathered their views on everything from the danger of retrofitting refrigerants to the misunderstood debate around CO2 greenhouse gases.

Keep up and find out what you need to know in this changing landscape.

Press play. 

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Tune into the grand finale of "Le Tour de Cooling" as Jens and the crew explore the bright future and growing demands of cooling.

Our hosts are asking. "Do you really need to be experts in every component? Or is system-level understanding enough?" What are the pitfalls and how can we all succeed in the long term?

This is one episode you don't want to miss! Press play and let’s chill!

In this new Chilling with Jens episode, we're exploring the world of refrigerants – its history, function, and why it matters for your practice and our planet.

We debunk common misconceptions and spotlight important, often overlooked details, like selecting the right oil for your refrigerant.

Stay informed and ahead of the game. Press play now for the latest expert insights! Listen now!

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In this Chilling with Jens episode, the team is here with practical details for selecting, placing, and commissioning the condensing unit.

If we've learned one thing, it’s to challenge the common misplacement of these units. If you’re hunting the unit down like you’re on a safari, then there are bigger issues to consider.

Press play and tune in for the latest expert advice now.

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What does an expansion valve really do? Our Chilling with Jens experts are here with your one-and-only guide to expansion valves, why they matter, and what you need to know.

You’ll find out that expansion valves do *not* control evaporating temperature, discover the drawbacks of insulation, and learn about the pros and cons of electronic vs. manual valves. And more.

Always expert, always Chilling.

Press play and listen as we talk expansion valves.

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Join your host Jens Andersen and experts John Broughton and Jörg Saar on a deep dive into the liquid line. This week, we are busting a few myths, like whether height always matters and if you should consider insulating your liquid line.

We’ll also talk about the problem that is costing the environment and your wallet: too-long liquid lines. You’ll learn that shorter is really better, but there are a few things to do now if you are stuck with a long line.

Press play and let’s get chilling!

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Jens, John, and Jörg are back to help HVAC professionals manage the condenser, along with its surrounding fans and controls. They cover how it all works and much more, from getting the initial installation right to knowing the signs of a faulty condenser.

The key is proper, regular maintenance plus... “Airflow.” “Airflow.” “And more airflow.”

Press play and listen in as the gang continues, "Le Tour de Cooling.” 

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In this episode of Chilling with Jens, the crew continues their “tour” of commercial application systems by looking at the compressor. 

We start off by learning that a presumably defect compressor may signal a bigger system issue. 

Fortunately, Jens has experts John Broughton and Jörg Saar on the line to share what to do and what not to do when replacing a compressor and diagnosing possible causes.

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In this episode of the Chilling with Jens podcast, Jens kicks off a mini-series “tour” of commercial application systems.

Together with John Broughton and Jörg Saar, the experts get started by discussing evaporator issues in commercial refrigeration systems, from defrosting to evaporator flexibility (or lack thereof).

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Downl...

The audio for this episode was taken from a Livestream that was conducted on September 21 regarding heat pumps.

Jamie Kitchen, Jörg Saar, Jens Andersen, and Morten Skovrup were on the panel to give a talk, and respond to audience questions regarding the trending subject of "Heat Pumps."

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In this episode of the Chilling with Jens podcast, Jens, Jamie Kitchen, and Trevor Matthews of Refrigeration Mentor talk about how to stay relevant with developments in the refrigeration industry.

They discuss the hard and soft skills that would greatly simplify the life of a cooling technician.

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...

Our colleagues were on-hand at Chillventa 2022 to witness one of the largest trade shows for the Cooling business first hand. In today’s podcast episode, Jens talks with Jorg Saar, Jøran Burø, Morten Skovrup, and Mark Sever to get their views on this year’s exhibits, the latest news in the Cooling and Heat Pump business, and their key takeaways from the many on-site presentations they attended during the three-day show. Get all the Chillventa updates and highlights that captured our experts’ attention. And check out the solutions Danfoss presented at chillventa.danfoss.com.

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In this episode of the Chilling with Jens podcast, Jens speaks to John Broughton about how one can use an Optyma™ Plus Controller for fault-finding.

John speaks about the options when using the data gathered by the controller to identify possible malfunctions and defects in the system controlled by the Optyma™ Plus Controller.

Learn more about Controller for condensing unit Optyma™ Plus here.

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Your wish is our command.

Yes, we didn't search anywhere else for this edition of the Chilling with Jens podcast topic than the preferences of our listeners. 

This episode of the podcast will focus on "Electric Expansion Valves," which received the most votes on our poll. The topic of discussion between Jens, our host, and Xuefeng Bian, Danfoss Product Manager, will be the specifics of the various features of Electronic Expansion Valves. 

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In today's podcast episode, Jorg, Jens, Jamie, and John discuss their practical experiences in the refrigeration industry.

An episode full of thrilling anecdotes, personal experiences, and life-long lessons learned to survive in the refrigeration industry. 

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In this episode of the Chilling with Jens podcast, Jens speaks to Norbert Blatz about a game changing new Coolselector®2 programme feature designed to help businesses when calculating cooling systems for quotations.

With the latest Coolselector®2 update, businesses can now access a new template that can be applied for each new system, making the quotation process faster and easier.

Download Coolselector®2 here. https://coolselector.danfoss.com/

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In this episode of the Chilling with Jens podcast, Jens is joined by John, Jorg, and Jamie to talk about humidity issues in HVAC and in storage facilities.

They’ll dive deeply into the importance of humidity and its crucial role in comfort control.

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In today’s podcast episode, our experts, Jens, John, Jorg, and Jamie, discuss typical problematic habits and installation errors. Errors committed during the installation and commissioning of cooling systems, whether they are cold rooms, chiller installations, or HVAC systems.  So, kick back, relax, and let our experts take you on a fun ride full of valuable tips, tricks, and hints on how to avoid too many after-service visits.

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Jorg, Jens, Jamie, and John discuss oversized equipment and why it's not sized right in today's podcast.  

With a combined 75 years of experience, the four experts delve into themes ranging from the marriage of compressors and evaporators to the humidity of meat storage rooms and even white chocolates.  

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Thierry Legay, a Danfoss compressor expert, joins Jens on this edition of the Chilling with Jens podcast.

They delve into the realm of compressors, their power usage, and the many situations/conditions in which they operate.

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The essential, all-in-one mobile app for air conditioning and refrigeration technicians. You can subscribe and listen to Chilling with Jens and other local Danfoss Climate Solutions podcast via the Ref Tools app.

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In this episode of the Chilling with Jens podcast, Jens is joined by Joseph Krisher for a conversation about Pressure Sensors. They are going to discuss modern pressure sensors and give us a glimpse into the smarter future with connected products, the internet of things, etc. 

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The November episode of Chilling with Jens goes into details about temperature sensors for use mostly in refrigeration systems. Jens is joined by sensor expert Kevin Mee, and the two of them discuss how sensors work and how to get the best out of these small, but quite significant, pieces of passive electronic.

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In this episode of the Chilling with Jens podcast about commissioning best practices, Jens interviews John Broughton, Global Applications Expert, to discuss the start-up procedure for commissioning a cold room, either by starting up a brand-new cold room or after a thorough refurbishing. 

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The essential, all-in-one mobile app for air conditioning and refrigeration technicians. You can subscribe and listen to Chilling with Jens and other local Danfoss Climate Solutions podcast via the Ref Tools app.

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In this episode, John Broughton is talking about air flow in general and inside freezer rooms in particular. There are quite a few things to consider and pay attention to when building and servicing cold rooms, but also the outdoor units need attention.

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The essential, all-in-one mobile app for air conditioning and refrigeration technicians. You can subscribe and listen to Chilling with Jens and other local Danfoss Climate Solutions podcast via the Ref Tools app.

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In this episode, Jens is joined by Jörg Saar for a conversation about Secondary Cooling. Taking an application-level perspective, they go over the principles of energy transport, how one refrigeration system can create the foundation for another, and what situations it’s applied to. 

You can also check our infographic about secondary cooling here

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In this episode about low temperature and freezer applications, Jens interviews John Broughton, Global Applications Expert, to discuss the practicalities, methodologies, and precautions.

Here you can learn everything you need to know to build, maintain, and service low temperature refrigeration systems.

Check out our infographic about Freezer applications here

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Jens is joined by Danfoss North America’s favorite Canadian, Jamie Kitchen, to talk about superheat and the new TXV Superheat Tuner tool that’s now a part of the Danfoss Ref Tools app. Jamie starts out by talking about superheat, what it is, and the benefits of adjusting the thermostatic expansion valve to the optimum superheat setting. He then covers how the Ref Tools app can now help you set the correct superheat in a matter of minutes instead of hours.

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The refrigeration industry is steadily moving towards more sustainable refrigerants, which can have a big impact on all of you out there in white vans with dirty hands. In this episode, Jens and Jorg take a look at new refrigerants including A2L and A3 types, the rules and regulations surrounding them, and how to work with them out in the field. They also touch upon the pros and cons of several specific variants and the special considerations you need to keep in mind when handling them.

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In this episode of the Chilling with Jens podcast, Jens is joined by Drew Turner to talk about the benefits of oil-free heat pumps. They’re quick to dive into the exciting possibilities in district energy, exploring how to utilize waste heat generated from supermarket cooling, wastewater treatment plants, and the like. They also touch on how to service and maintain Danfoss Oil-free Turbocor® compressors. 

Heat pumps and Oil-free tech Q&A with Drew Turner (YouTube Livestream recording)

Der Kältekreisläufer mit Jörg Saar ( German podcast )

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Jens kicks off this episode with a very exciting update about Danfoss Climate Solutions and what that means for both the immediate and long-term future. He also dives into some other announcements about our new safety valve, the SFA 10H, and the EKE 400 superheat controller for industrial refrigeration. Finally, Eduardo Cruz stops by for a quick discussion on the Optyma™ Control Panel for commercial refrigeration. It’s a jam-packed episode you won’t want to miss!

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Jens is joined by Mustafa Yanik to discuss the use of microchannel condensers and the impact of all-aluminum heat exchangers on daily work with the material, reduced size, and general treatment of MCHEs.

Click to learn all about Danfoss MCHE

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Jens is joined by Nobert Blatz to discuss Danfoss’ free software solutions that help refrigeration technicians in their everyday work. The main topic of the conversation is Coolselector®2 and how the software can help technicians optimize energy consumption and increase efficiency in any HVACR system. They also touch on Ref Tools and a few other helpful mobile apps.

Click to get overview or our mobile apps and software.

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John Broughton joins Jens once again, this time to regale him (and you) with stories of the best and worst experiences with condensing unit installations from his field service expeditions in Europe and the UK. John shares several stories; his favorites being dealing with on-site visits where he had to clean up after installations went completely sideways. You won’t want to miss this one.

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In this special episode, Jens hands over the reins to Thomas Kolster and Julian Hall, sharing the audio from their recent livestream. The two of them discuss the future of connected cooling solutions, exploring exciting trends and current technologies. Tune in to get a fascinating look at where the future of the cooling industry is headed.

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In today's podcast, Jens talks about the implications of the increased charge limit for flammable refrigerants in self-contained commercial refrigeration appliances. As commercial refrigeration moves to low-GWP solutions, the revised standard means flammable solutions such as propane and iso-butane become more common. So, get a cup of coffee and let Jens and A2L and A3 expert Stefan Wesch unpack this hot topic for you.

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In today's special edition of the Chilling with Jens podcast, Jens shares his broadcast from Cooling United Live—Danfoss’ first fully immersive online event. Jens was joined by Danfoss application experts Jörg Saar and John Broughton as they sat down for a chat during the closing hours of the big event. Listen in as they talk about the cooling industry, answer questions from the audience, and share new insights about the Cooling United Lives’ main discussion topics.  

If you want the entire Cooling United Live experience, you can access all the sessions from the event on demand. Check it out at http://www.c...

In today’s podcast, Jens talks about pipework. When you consider a cooling installation, pipework and pipe size should always be a priority simply because it connects everything together. So, kick back, relax, and let Jens be your guide as he provides tips, tricks, and traps for piping.

Checkout our dedicated infographics on piping:

How to plan piping like a master

How to run pipe like a master

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In today’s podcast, Jens talks about compressor rack systems. Using several compressors to control the capacity in a cooling system can be a challenge. Luckily, Jens does what he does best and breaks it down in an approachable way, so you can get a good overview.  

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In today’s podcast, Jens touches on something slightly different—a niche that technicians are not so familiar with—or, rather, a small corner of the world of refrigeration that only a select few refrigeration technicians are working with: transport cooling. 

Jens is joined by Stefan Wesch, who knows everything worth knowing about transport cooling. Together, they share a small glimpse into the world of Transport Cooling and the challenges it’s facing in today’s world. They also explore the implications for companies like Danfoss that supply components to this essential corner of refrigeration.

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It’s a special occasion! The Danfoss TU valve is turning 25 years old this year. So, Jens is joined by Jorg Saar, Danfoss’s Global Applications Manager, to reminisce about and celebrate the impact the stainless-steel valve has made on the market over the years and discuss how the valve’s unique design will prevail for years to come.

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In this episode of Cool Talk, everyone’s favorite Chilly Jens is joined by the enthusiastic and exuberant Stephan Bachmann, application and technical support team leader at Danfoss. The two of them discuss the finer points of reciprocating compressors and touch on Stephan’s passion for exotic and unique variations of cooling applications.  

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In this episode, Jens discusses traditional star-delta starters and shares a few insights into three-phase power supply.

He also goes into the very basics of three-phase voltage, showing how it comes into play when the star-delta starter is used in connection with traditional hermetic or semi-hermetic compressors. 

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A compressor's operational flexibility has its limits, which is illustrated by the Operating Envelope.  The Operating Envelope indicates the theoretical threshold a compressor can function in without being challenged by the operating conditions. And, right in the middle of this area, is the compressor's sweet spot. 

But what sets the limits? And how do you avoid pushing the compressor past its boundaries? Jens is once again joined by application expert John Broughton, who gives some unique insight into the life of compressor.

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In this episode of the Chilling with Jens podcast, our host looks at the overall landscape when it comes to the use of CO2 in refrigeration, air conditioning, and heating from a Danfoss Perspective. He also explores how the business has developed over the last decade in terms of applications and technical trends are headed. Finally, he discusses the challenges our industry faces and some ideas on how to overcome them. 

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In this episode of Cool Talk, Jens interviews Senior Product Manager Ejnar Luckmann about the new Danfoss AK-CC55. They discuss several of its intriguing new features, such as its smartphone user interface, improved defrosting, and adaptive liquid injection algorithms. Ejnar also shares some insightful information on the historical development of the Danfoss ADAP KOOL® controllers.

Learn more about Danfoss AK-CC55: https://www.danfoss.com/en/products/electronic-controls/dcs/evaporator-and-room-control

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After straying away for a bit to focus on “Cool Talk”, Jens gets back on the educational track here in Chapter 19. This episode addresses the “cool” part of the cooling system: the evaporator, the evaporator coil, and the TXV. Jens discusses how they work together to optimize the cooling process and shares his insights about function, maintenance, and servicing.

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In this special wintery edition of Chilling with Jens, our host dives back into the written works of Glenn Moore. This time around, the focus is on how compressors and condensers operate during the winter season in the northern hemisphere. There are special considerations to keep in mind to keep things slightly comfier for the compressor with a warm coat (of sorts) and how to nurse the condenser along with softly dampened air flowing through the coil.

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The Danfoss Optyma™ Plus condensing unit is ideally suited for use in locations with high ambient temperatures. However, when you combine the naturally high environmental heat with the use of a new refrigerant, the scroll compressor inside the unit can start running hot.

In this episode, Jens is joined, once again, by Danfoss expert John Broughton, who shares an interesting trick that Danfoss is using to keep the compressor cool.

Learn more about Danfoss Optyma™ Plus condensing unit: https://www.danfoss.com/en/products/condensing-units/dcs/condensing-units/optyma-plus/

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Jens dug through the Danfoss archives and found four articles written by Glenn Moore, longtime Danfoss Technical Field Service and Support Manager.

In this episode, Jens reads through each one to reveal insightful and still-relevant information about condensers, as well as Glenn’s personal stories about the different challenges he’s faced out on service calls. Here’s a quick breakdown of the topics: - The Australian condenser and the London connections - Bubbles in sight glasses does not always tell the same - An ammonia plant and the liquid cooled condenser - Water cooled condensers and the pi...

This podcast is about the use of CO2 or carbon dioxide as a refrigerant in larger commercial systems like supermarkets or hypermarkets. CO2 or carbon dioxide, is a natural occurring substance, a natural part of the earthly atmosphere, although the concentration has been rising in the last 50 years, the CO2 is still one of the most environmentally friendly refrigerants and is one of the few sustainable refrigerants for food retail applications. The podcast is made as a teaser and inspiration to get on board the Refrigerant Week 2019. Learn more at http://refrigerantweek.danfoss.com

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Cool Talk: Interview with Norbert Blatz on switching to low-GWP refrigerants. Norbert tells us what you need to know when performing a retrofit in an existing system, what considerations you need to have, what protocols, guidelines and standards you need to comply to. Norbert touches also on some of the practicalities and the certifications that an installer will need to obtain. The podcast is made as a teaser and inspiration to get on board the Refrigerant Week 2019. Learn more at http://refrigerantweek.danfoss.com

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In this episode Jens talks about the things to consider when charging new refrigerant into an existing system, what to think of, what to do, and what not to do. You can do the shift in charge from HFC to another HFC and in some cases also from HCFC to HFC, but you just don’t go all the way to HFO in an existing system. You need to check the component performance, so you’ll need to know what you’re doing! The podcast is made as a teaser and inspiration to get on board the Refrigerant Week 2019. Learn more a...

Why compressors fail: John Broughton, Danfoss Global Application Specialist, joins Jens for a special edition of the podcast. They discuss the most common reasons compressors fail and how to avoid these failures. John also shares some sage advice to keep in mind when installing compressors, piping, and lubrication. Finally, the two dive into setups and adjustments of cooling systems.

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In this chapter, Jens discusses PLC’s or “Programmable Logic Controllers”. He dives into the logic behind them and the Boolean perception of logic, i.e. "True" and "False”. He also covers a bit about programming, statements, and conditions.

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This chapter sheds light on more complex store systems, including remote monitoring. These systems are tailored for large contractors, supermarket chains, and independent monitoring companies. These systems provide real-time status monitoring, which helps ensure food quality, system health, and diagnostics. Join Jens as he takes a deep dive into what all this means and how installers can help their customers understand how and where to use a system manager.

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Jens talks about capacity controls and Danfoss Pack Controllers. He also discusses different ways of controlling the energy consumption of the most energy-consuming part of the refrigeration system: the compressor. Finally, he touches on the condensing fans as he continues to guide you on your journey through the world of electronic controls for cooling systems.

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We’re moving on to more complex controllers and therefore also the applications that go beyond basics. Jens talks about controlling stand-alone applications like glass door merchandisers and display cases and the controlling of the different functions, such as capacity control, superheat control, and defrosting.

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The ETC has a simple design, but it’s still a pretty clever refrigeration control that can yield some impressive benefits. In this episode, Jens uses the ETC as an example for explaining the sensor-controller-compressor interface, signal logic, programming, and cabling.

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In this episode, Jens shares what you need to know about digital communication. He also covers the issues related to setting up a good and stable communication with your electronic controllers for the refrigeration business.

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Get a lightning-fast recap of what you learned about electricity and electrical components in trade school, plus a few secrets they didn’t tell you at the time. This episode covers both the good and the bad, and it’s all essential knowledge that you’ll need when you’re working with refrigeration out in the field.

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In this episode, Jens takes you on a journey through indirect cooling, brine, and other coolant types. Discover remote cooling, where you transfer cooling with fluid coolants to avoid using hazardous refrigerants near food or inhabitable environments. Jens also touches briefly on heat pumps as an example of indirect cooling and heating.

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In this episode, Jens talks about the most common ways of controlling cooling systems—from basic smaller systems to complex commercial versions. He also briefly mentions electronic controls and their benefits.

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Chapter 9 is all about refrigerants, including what they are made of and what you should expect when using them. Safety is job 1, so Jens focuses on sharing about safety codes and precautions. Finally, he gives you a quick shot of retrofitting knowledge.

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In this chapter, Jens discusses the condenser and the role it plays in the refrigeration process. You’ll learn about the two main types of condensers and what you need to keep in mind when working with the air-cooled variety. Last, but not least, Jens shares some wisdom about air-cooled condenser pressure regulator methods.

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In this episode, Jens takes a quick break from the usual topics to cover something special as part of the Danfoss Refrigerant Week 2018 (Sept 24 - 28). As new regulations phase out old refrigerants in favor of more environmentally friendly ones, HVACR professionals will need to perform more refrigerant retrofits.

Jens discusses what you need to think about when doing a retrofit. It may seem like a walk in the park, but there are several things that you’ll need to consider, including things that don’t necessarily have a direct connection to the replacement of a refrigerant.

Le...

Let’s talk about compressors. There is so much to learn when it comes to compression and how you achieve it. In this episode, Jens eases you into the topic by touching upon the different types of compressors available.

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This episode is all about controlling the evaporation and expansion process electronically using sensors, controllers, and two types of electronic expansion valves. Electronic control can provide a lot of benefits and is an important part of modern refrigeration systems.

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In this chapter of Chilling with Jens, Jens discusses the thermostatic expansion valve—a key component in many refrigeration systems such as cold rooms or walk-in coolers. The TXV, or metering device, is installed to ensure correct and optimal pressure in the evaporator. Tune in to learn more about the TXV and its importance, and maybe even pick up some fun trivia bits along the way (hint: the TXV and Danfoss go back...way back).

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This chapter is about the components in a refrigeration system that are necessary for the system to work. We take a look at the expansion device, compressor, evaporator, and condenser, and how they work together to make cooling happen.

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In the third chapter, Jens discusses the different types of refrigerants, how they are used, and the advantages and disadvantages of each.

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In this second chapter, we look at how refrigerant absorbs heat from the things we want to cool down and transports it out of the refrigeration system.

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This chapter is all about the evaporation process. Jens dives into how cooling takes place and what physical mechanisms need to be in play to make that happen.

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