Whether or not HCs become major refrigerant players in the U.S. depends on who you talk to. Advocates point to extremely lower global warming potential, low cost, and a proven track record in Europe and Asia. Others see the flammability issue, A3 safety rating, and current building and fire codes limiting use to smaller applications.
Megohmmeters (meggers) are electrical meters used to check the resistance and condition of the motor windings and the condition of the refrigeration and oil environment around the motor windings. A megger is nothing but a giant ohmmeter that creates a very large dc voltage (usually 500 volts dc) from its internal battery.
While troubleshooting or installing refrigeration systems using a thermostatic expansion valve, it is a relatively common task to measure the superheat value of the refrigerant leaving the evaporator. However, there is a major consideration when using this measurement to analyze the operation of a system.
The Helbing family has always had a strong desire to succeed. Each member looked for an opportunity to be successful and each started in a different field, but eventually they came together to build up Air-Tro Inc., Monrovia, Calif., as a successful company.
Terry Brock’s presentation at the new National HVACR Technology and Business Systems Forum kicked off Contracting Week™. The week consisted of four learning events for HVACR professionals, presented by the Air Conditioning Contractors of America (ACCA) and The NEWS.
Today there are tons of HVAC parts and equipment available for sale online to do-it-yourselfers and consumers who want to bypass the traditional means of purchasing equipment from an HVAC contractor. So who installs the equipment?
The ACCA Quality Assured(QA)program, which launched earlier this year, was created to recognize contracting businesses that follow proper procedures and practices to design, install, and maintain home heating, cooling, and ventilation systems.
In recent months, Tecumseh Products Co. has made a number of announcements related to a line of refrigeration compressors that are optimized for HC refrigerants, an expansion of its line of large frame rotary compressors, and the introduction of direct current (dc) compressors.
A study from Carel has tried to get a precise handle on supermarket refrigeration energy savings at various levels of upgrades and at the same time has assigned some new terminology to the steps — ‘traditional,’ ‘evolved,’ and ‘excellent.’
The use of ammonia as a refrigerant has been around for approximately 160 years, dating back to its first use in France in the 1850s. It first appeared in the United States in the 1860s when it was used for artificial ice production. Its latest uses are a testament to the growing popularity of ammonia refrigerants.
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