Service & Maintenance

Btu Buddy 138: An Overcharged System - Part 1

Bob and Tim were on their way to a service call with a new customer. When they got to the job, the customer explained, "The unit was not cooling and I had a company come out for a service call. The unit seemed to work OK last week when it was a little cooler outside, but this week it has warmed up and the unit is not functioning as well."


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Btu Buddy 137: Heat Pump Problem in the Summer

Bob and Tim were on their way to a no cooling call; in fact, it sounded like a heating call. The customer has a bonus room on the third floor that used to be attic space. When Bob and Tim arrived, the customer told them, “The bonus room upstairs seems much too hot and the air coming out of the registers is hot to the touch.”


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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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