Compressor overheating is one of the industry's most serious field problems today. One of the most elusive causes of compressor motor overheating and failure is voltage unbalance. This article addresses voltage unbalance in three-phase compressor motors.
When global beverage manufacturer Coca-Cola announced an initiative to optimize its vending machines, Danfoss performed tests that yielded a 36-percent improvement in efficiency while still meeting the objectives of the cola company.
Here's a statistic that should give contractors and technicians pause before they condemn a compressor at a jobsite: One-third of all compressors pulled from the field, returned to manufacturers, and torn down for failure analyses do not have observable defects.
U.S. shipments of residential HVAC equipment were up solidly in 2004 over 2003. Shipments in the Canadian market had mixed results. Meanwhile, manufacturers are keeping their eyes on several key issues, including competition from foreign manufacturers, raw material prices, and new efficiency standards.
The Air Conditioning Contractors of America (ACCA) announced that its members can now receive mold insurance coverage as part of a new Environmental Pollution Liability Policy. The policy was introduced at the ACCA 37th Annual Conference & Indoor Air Expo.
Because it will be the site of the NCAA men's basketball finals, here's betting the action will be hot and heavy inside the Edward Jones Dome April 2-4. But Brian McMurtry and his maintenance crew are banking on the inside environment of this spacious facility being nothing but cool and comfortable next weekend.
HVACR distributor sales are on the upswing, but distributors do have concerns, including market conditions, foreign competition, contractor business practices, tort reform, and how to handle industry price increases.
John Young is sometimes described as a marketing guru because of his experience and insights into successful marketing strategies for HVACR contractors. Young, whose title with AirTime 500 is chief innovation officer, spoke with attendees of the group's spring meeting in Anaheim.
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