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Monthly Archives: January 2014


When thousands of exhibitors and visitors descended on New York City for the 2014 AHR Expo, many of them weren’t prepared for the sudden snow storm that blanketed the streets of downtown Manhattan.  Preferred Utilities, however, came well prepared–and stirred quite a buzz by bringing several big items to the big apple.

Preferred Utilities debuted its new Advanced Performance Inject-Air Low NOx Axial Flow Burner (API-AF). This burner includes Preferred’s first packaged burner unit for 4MMBTUH-20MMBTUH applications.

API AF outside

API-AF Burner

By producing an exceptionally stable flame at all firing rates, the API-AF offers the same high efficiency, low emissions, fuel variety, and ease of maintenance of the original API burner–just in a smaller, more robust package.

API AF inside

API-AF Burner (open)

Included in the API-AF package is the new BurnerMate Light controller. Boasting UL approval, the BurnerMate Light provides an economical, state-of-the-art microcomputer-based burner management system with built-in first-out annunciatior and combustion control for a single burner, boiler, or process heat application.

BurnerMate Light

BurnerMate Light

Preferred Utilities also made a splash with its new Waterproof Pumps – an innovation spurred by Hurricane Sandy. The flooding in areas like New York and New Jersey emphasized the need to rethink mission critical infrastructure. Preferred developed the Waterproof Pump to operate uninterrupted during flood events, ensuring the safe supply of fuel for emergency generators and boilers.

WP Waterproof Pump



Also at the show: Preferred’s new Fuel System Controller (FSC). The FSC is Preferred Utilities’ next generation programmable logic controller with features specifically designed for critical data center and health care backup generator fueling systems.  FSC controllers automate fuel oil pump sets, suction integrity test, leak detection monitoring, generator day tank level control, day tank return pumps, main tank filtration/chemical treatment skids, multiple main tank motorized selector valves, tank gauge integration, tank truck off-loading , and much more. The FSC distributed control architecture avoids common mode failures. Each FSC has an independent power supply, CPU and I/O . Multiple FSC controllers communicate over a masterless, electrically  isolated, dual redundant network.

If you need to rethink your mission critical strategy–or if you would like further information on any of these new products–please contact Preferred today!

(203) 743-6741


Everything You Need to Know about the Preferred Pyroscope

When a submariner peaks into a periscope, it allows him  to survey his surroundings for potential dangers. When an engineer peers into a pyroscope, it allows him to inspect his boiler for potential combustion problems.

For frequent visitors to our site, you might have noticed a few changes. First off, we changed our look and we started a blog: The Preferred Pyroscope. Dedicated to serve as the go-to place for industry information,  we have one goal in mind by starting this blog: we want to help combustion engineers make informed decisions.

What should I expect?

If I were you, I would bookmark this page right now. We will use this blog as a spot for news, announcements, case studies, white papers, Q&A for users in our industry, and as a general source for expert information. This will be the best place to go for discussions on mission critical systems, combustion engineering, instrumentation, fuel oil handling and more. Plus, you can keep up with what we are doing. Did you see our post about our upcoming involvement with the 2014 AHR Expo?

What does our mission statement mean: Helping combustion engineers make informed decisions?

We want to help you, the engineers, make informed decisions. Whether that is giving you a deeper background into our products, insight into the industry, white papers, Q&A’s, or case studies, we want to help you be successful!

I will also be posting my thoughts on what’s happening in the industry, and I hope that this will provoke others to share their thoughts. After all, that’s what makes this industry such an exciting one to be a part of—and we value your opinion.

Who is behind this blog?
My name is Justin O’Donnell and I am the Marketing Manager at Preferred Utilities. I am based out of Danbury, CT and am a graduate of Pensacola Christian College in Pensacola, FL.

While I will be assisted by my coworkers with Q&A’s and bringing the experts in our industry to the forefront of conversation, I will be managing the day-to-day activities of the blog. Please feel free to leave comments and questions. We will be regularly monitoring it!

Did you know creating a connection with a company creates a better experience for you as the consumer? We invite you to make a resolution this year to stay connected with Preferred Utilities. Join in the conversation on our blog, follow us on Twitter, sign up for our newsletter, friend us on Facebook, find us on LinkedIn and YouTube.  


Side panelFood Processing Plant Saves Money by Burning Alternative Fuel


Many processing plants produce large amounts of waste water, causing plant owners to rethink their energy use strategy. In 2013, a mid-western US food plant found a way to use its own waste water as an alternative energy source.
When the city of Janesville, WI began constructing an anaerobic digestion system at its waste water treatment facility, the city created a contract to sell conditioned biogas back to the food plant.
Using its own conditioned biogas, the food plant unlocked the ability to burn self-produced alternative fuel. But in order for the project to be a success, the plant needed a combustion system capable of handling such a unique demand. Based on prior success with a similar plant., the plant owner’s turned to Preferred Utilities and a team consisting of Leidos Engineering, LLC and American Boiler.


Preferred Utilities designed and supplied a complete combustion system, including an API-800 Burner, a bio/natural gas mixture piping train, and a proprietary burner management/combustion control system.
The system was designed to burn either natural gas alone, or a mixture of preferential biogas and supplemental natural gas. Because digester gas contains sulfur and water, Preferred fashioned 316 stainless steel for all burner and piping components to resist corrosion. The combustion system’s startup and operation procedure is governed by a BurnerMate TS burner management/combustion control system.


The system consists of Preferred Instruments DCS-III digital controllers and a GNE 5004-M-85 Flame Safeguard module. The plant now employs a full metering combustion control strategy with FD fan, VFD control, and oxygen trim. The combustion air demand is determined based on the sum of the combustion air requirements established by the inputs of both the natural gas and biogas flow rates.


The combustion system now fires a natural gas/biogas mixture, with priority given to biogas based on availability established by supply pressure, thus maximizing fuel cost savings for the food processing plant.



Side panel

Boiler Controls Upgraded for Efficiency, Flexibility, and Reliability


Ford Motor Company sought to upgrade its burner management and combustion control systems at its research and engineering powerhouse in Dearborn, MI.

With the support of local representative D.J. Conley Assoc. Inc., Preferred Utilities upgraded several multi-burner boilers from manual to automatic firing rate control within the guidelines of NFPA 85.

Originally a 4-burner manual system firing natural gas, Preferred’s PLC-based BMS, PCC-III controllers, and DCS-III Controllers now allow for successive burners to be automatically lit-off or stopped based on load demand. Sequencing of burners is now made by way of a burner firing order” selection screen.

Furthermore, operators can now choose either Warm-up or Hot Standby mode. Warm-up mode holds one or two burners at low-fire until the boiler reaches its minimum flue gas temperature. Once reached, the firing rate and additional burners will light-off or shut down based on load demand.

Hot Standby holds one or two burners in the same manner, but once the flue gas temperature is met, the burners shut down and the boiler is tripped.

Preferred provided more upgrades, including dual 15-inch touch screens, “igniter only” mode and sequencing flexibility for operators. A fully-metered, cross-limited fuel-air ratio control with FD fan VSD and Oxygen Trim control provides for improved combustion efficiency. 3-element feed water and 2-element draft controllers provide for reliable operation.



AHR Expo


Preferred Utilities Manufacturing Corporation will be exhibiting at the 2014 AHR Expo, the largest HVACR marketplace!

We will be showing off our new “Advanced Performance Inject-Air Low NOx Axial Flow Burner” as our highlight product, as well as the new “BurnerMate Light” combustion control processor, and our “Waterproof Pumps.”

We will have “in-person” models of the API Axial Flow burner, the Waterproof Pump, the BurnerMate Light, as well as many of our other dependable products.

Preferred Utilities Manufacturing Corporation will be located on Level 3 at booth 1732!


About the AHR Expo
The AHR Expo is the annual tradeshow sponsored by ASHRAE and its members. Each year, thousands of exhibitors, attendees, and industry experts descend on the AHR Expo tradeshow floor to share ideas, see new products, and network with fellow ASHRAE members.

Founded in 1894, ASHRAE (American Society of Heating, Refrigerating, and Air Conditioning Engineers) represents a large number of building technology experts, engineers, customers, and manufacturers. With over 54,000 members worldwide, ASHRAE and its members specialize in architectural design of building systems, energy efficiency, indoor air quality, refrigeration, and sustainability within the industry.

For more information on the AHR Expo, please visit www.ahrexpo.com

We hope to see you there!