Service & Maintenance

Ammonia Chiller Provides Tailor-Made Refrigeration Solution for Ice Rink

Chiller Features a Very Low Ammonia Charge

Live Active Leisure needed to replace its existing system due to the legally imposed phaseout of HCFCs in the United Kingdom. Johnson Controls proposed the installation of an air-cooled ammonia chiller complete with heat recovery and a very low ammonia charge due to the location being close to a pedestrians’ footpath.


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Study Tests Effectiveness of Rooftop Unit Preventative Maintenance

Looks at Whether Retailers Save Money by Minimizing Risk of Equipment Failure and Reducing Service Calls

Alpine Mechanical Services has announced the completion and results of a collaborative energy efficiency study on rooftop units conducted by Alpine Mechanical, Siemens Industry, and Nexant. The study tested the efficacy of HVAC preventative maintenance best practices in a retail environment.


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Btu Buddy 134: An Unusual Service Call

Bob and Tim were on their way to a no cooling call. The spring season was still cool at night and warm in the daytime. The customer told the dispatcher, “The unit started up at about 10:30 a.m. this morning and made a noise, but did not cool the house, even though it is still running.”


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Air-Fuel or Oxy-Fuel for Soldering and Brazing?

There Is a Time and Place for Both Processes in HVACR Applications

For the HVACR technician, the right tool for soldering and brazing pipe — an air-fuel or oxy-fuel torch — depends on the type and diameter of the pipe, its location, and considerations related to cost, safety, convenience, and ease of use. This article will examine those factors, as well as clarify some technical issues.


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2015 ACCA Conference

Images from the 2015 ACCA Conference in Grapevine, Texas. Posted on April 8, 2015.

Podcasts

NEWSMakers: Clint Schreck

Clint Schreck, general manager, Columbus Worthington Air, Columbus, Ohio, discusses winning Angie’s List Super Service Award, how to handle online reviews, and much more.

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2015 May 25

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2015 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

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