Heat pumps - Page 41

In response to DOEâ??s Rooftop Unit Challenge initiative, Daikin designed the Rebel rooftop heat pump, which achieves part-load efficiencies of up to 19.2 IEER.

Heat Pumps Designed to Save Energy

High-Efficiency Equipment in High Demand

May 26, 2014

The energy-efficiency ratings of residential air-source heat pumps have risen dramatically over the last few years, with many manufacturers now offering equipment well exceeding the 20-SEER mark. There have been significant gains made in commercial heat pump efficiencies as well.

Commercial Cooling Showcase 2014: New Equipment Just in Time for Summer

Comfort and Higher Efficiencies are Hallmarks of Commercial Products

May 5, 2014

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It’s time again for the Commercial Cooling Showcase. The NEWS’ annual issue has traditionally introduced the latest air conditioning units available for the upcoming summer season. The intent is to help contractors prepare for this busy period by doing the research that will help them distinguish between brands.

This illustration shows a partially shorted (shunted) coil that will not operate. It is compared to a good coil with the correct ohm reading.

Btu Buddy 130: Heat Pump Electrical Problems

Bill Johnson

January 20, 2014

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Bob and Tim have gotten together for another informational session. Tim requested some extra after-hours training about heat pumps. In their last session, they talked about heat pump mechanical problems. This time they discuss electrical problems.

Modine Mfg. Co.: DX and Heat Pump System

January 6, 2014

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The Airedale ClassMate® single packaged vertical DX and heat pump system has been redesigned.

Robur: Gas Absorption Heat Pump

December 30, 2013

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Robur captures the advantages of a condensing boiler and an electric heat pump in one unit. Robur’s air-to-water reversible heat pump supplies hot water up to 140°F or chilled water down to 41°.

This is an illustration of a method of checking a four-way valve on a heat pump.

Btu Buddy 129: Heat Pump Service Tips

Bill Johnson

December 23, 2013

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Bob and Tim were taking a break and Bob began explaining some of the tips that he has learned in servicing heat pumps. Bob said, “Let’s go over some of the service problems that you may have with a heat pump.”

Carrier, Bosch Form Joint Venture

Pair to Develop, Manufacture Geothermal and Water-Source Heat Pumps

November 25, 2013

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Carrier Corp. and Robert Bosch North America Corp., signed an agreement to form a joint venture to develop and manufacture geothermal and water-source heat pumps for the North American residential and commercial segments, the companies announced recently.

an air-source heat pump operating at 0Â°F outdoor temperature

Btu Buddy 128: Why a Heat Pump?

Bill Johnson

November 18, 2013

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The season was getting colder and heating calls were beginning to come in. Bob and Tim were riding to a large residence that had three heat pumps to provide heating and cooling for the structure and Tim asked a question, “Why are heat pumps so popular?”

Troubleshooting Challenge: A Split System Heat Pump That’s Not Cooling

Jim Johnson

November 4, 2013

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Our troubleshooting problem involves a split system heat pump in which the outdoor unit is operating in an 85°F ambient, and when you arrive in response to the customer’s no cooling complaint, you find the indoor fan operating normally, and you also note that 240 volts is read at L1 and L2 of the outdoor unit.

Sept. 17, 2013: University of Maryland Wins First Place in MaxTech Competition

Student Team Develops Energy Saving, Two-Stage Heat Pump Clothes Dryer

September 17, 2013

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For the second straight year, a team of University of Maryland (UMD) students has won the Max Tech and Beyond Design Competition for Ultra-Low-Energy-Use Appliances and Equipment.