The UL 489 B1NQ miniature circuit breaker is a direct replacement for the common miniature circuit board (MCB) when paired with the optional surface mount. This recyclable, quick-connect breaker is available in three curves (B, C, and D), ranges from 0.5-63 A and is compliant with UL/CSA/IEC standards for branch circuit protection in commercial and residential applications.
Converting residential air conditioning equipment that uses R-22 to a replacement refrigerant is seen by many contractors and homeowners as a good way to extend the life of the system while removing R-22 from the picture. There are a number of replacement refrigerants to choose from, but with any replacement, it’s important to remember that the refrigerant is only half of the equation.
Sales of cooling equipment increased this summer, according to the Air-Conditioning, Heating, and Refrigeration Institute (AHRI), whose combined June and July 2017 reports showed that U.S. shipments of central air conditioners and air-source heat pumps were up about 5.7 percent compared to units shipped during the same time frame in 2016.
Rick Haller, CEO of Lititz, Pennsylvania-based Haller Enterprises Inc., jokes that he got his start in the HVAC industry at the ripe age of 16 because the labor laws were different than they are nowadays. In 1981, at age 23, he had left that company and started his own business, operating out of his garage.
The ProSpace VRF Low-Ambient Outdoor Unit provides a low-cost method of heating and cooling buildings for a variety of applications. It is designed for easy installation, start-up, and service. It is available in 6- to 24-ton configurations with 100 percent heating and cooling capacity down to minus 13°F and minus 25°C.
While residents and business owners in Texas, Louisiana, and Florida struggle to rebuild their lives following the path of destruction left by Hurricanes Harvey and Irma, local HVAC contractors and manufacturers have an opportunity to step in and do what they do best — provide comfort.
The NEWS spotlights the industry’s latest commercial heating products in the following photo feature. The manufacturers provided us with brief descriptions of the features included with each product. For more information, please contact the manufacturers or their distributors.
All technicians at some point will need to call and speak with a manufacturer’s technical support adviser. I have made many calls to these advisers throughout my career and learned how to best get the information I needed from them.
Effective weld purging is only achieved by making sure that oxygen is displaced from the purge zone prior to and during welding. Any residual oxygen can cause significant loss of corrosion resistance and a reduction in joint strength. It is therefore essential to seal the pipe on either side of the joint and maintain this seal throughout the process.
The high failure rate or inability to grow beyond a few trucks is due primarily to an entrepreneur’s lack of business training. The technical skills acquired, which are, of course, an asset, soon become a liability in terms of not having mastered business skills necessary for success and profitability.