Technical

Providing More Precise System Charging

June 25, 2004
A new refrigerant charging device (patent pending) has been developed to supply a simplified method of providing more precise system charging. It is intended to give technicians an easy and more accurate way to charge. This article details the invention.
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GPS Saves On Capturing And Tracking Job Costs

June 12, 2004
When you have a large contracting company, keeping close control of job time and costs can provide substantial savings and help increase profitability. That was the goal when this contractor looked into the use of a global positioning system (GPS) application.
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Distribution Software Provides Real-Time Benefits

May 28, 2004
Providing the most efficient link between contractor customer and its distribution operation was the goal. Even for those customers who were "technologically challenged," this distributor wanted to develop a simple computerized system that would provide immediate pricing updates and easier ordering.
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Efficiency And Indoor Air Quality In Relocatable Classrooms

May 14, 2004
School districts in California and throughout the U.S. are increasingly using relocatable classrooms (RCs), also known as modular or portable classrooms. A study was conducted that demonstrates technologies that can simultaneously improve energy efficiency and indoor environmental quality in RCs.
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VFD Technology Reduces Harmonics At Partial Load

May 1, 2004
ABB is applying its patent-pending Swinging Choke technology "to reduce harmonics at partial load, making an essentially efficiency-driven solution that much more efficient."
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The Benefits And Limitations Of Corrosion Coupons

April 17, 2004
An estimated one sixth of all steel production worldwide is used to replace corroded metal - much of it at cooling and process water piping systems. This article details the benefits and drawbacks of using corrosion coupons.
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Commissioning: Quality Assurance For The Bottom Line

March 31, 2004
Commissioning starts by preventing errors in the most critical, early stages: planning and design. After the ground is broken, the process checks for correct installation and start-up. Only the next two stages, functional and performance testing, check for incorrect operation.
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Profits And Protection: The Benefits Of Surge Protection

March 19, 2004
What is the homeowner's No. 1 complaint regarding his HVAC system? It's downtime. What is the No. 1 cause of downtime? Other than poor maintenance or old age of the equipment, the leading cause is power quality.
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VFD Electronic Bypass Benefits

March 5, 2004
A VFD bypass assures the customer uninterruptible operation with their HVAC system - the ability to keep their fans and pump running at all times - even if the drive is taken out of the loop for whatever reason.
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Indications Without Insight Aren't Really Indications At All

February 21, 2004
Moisture indicators on HVACR systems have been billed as critical early-warning components in the fight to cut the long-term effects of water damage and reduce repair and maintenance costs. But do they truly live up to their billing?
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