With a capacity of 25 tons of refrigeration, the Performer® SH295 scroll compressor for air conditioning has been added to the manufacturer’s large commercial scroll compressor portfolio. Cooling capacities range from 183 to 374 kBtuh/53 to 110 kW at 60 Hz and 150 to 310 kBtuh/44 to 90 kW at 50 Hz.

The Speedfit® family of Twist & Lock Fittings has been expanded with the introduction of new Speedfit Secure shut-off valves, in a clean white design. The lead-free friendly valves are available in 1/2- and 3/4-inch copper tube size (CTS) sizes.

The Genteq™ Evergreen CM is a universal electrically commutated motor (ECM) for aftermarket light commercial heating and cooling applications. The ultra-high-efficiency ECM features flexible control methods to help the installer balance airflow in HVAC systems such as variable air volume, series boxes, or package heat pumps.

Most new installations of grilles and diffusers involve a suspended ceiling grid, but some installations require surface mounting. Square ceiling diffusers and filter grilles can present the biggest challenge. Here are some recommended guidelines and solutions.

Some people say that the compressor is the key component, or heart, of an air conditioning system. And like the human heart, the compressor must be kept in tip-top condition to run the system efficiently.

Some of the most common problems and solutions for smooth compressor operation can be found in training materials and on-the-job experience. There is also another method for educating HVAC contractors and service technicians — getting answers straight from the manufacturers.

Manufacturers continue to make advances in compressors, especially when it comes to efficiency and ease of maintenance. This roundup highlights some of the latest offerings to hit the market, as well as those that will be available later this year.

Although overall standards of refrigeration maintenance remain high, at many facilities there is still room for improvement. Upgrading your company’s rotating-equipment maintenance procedures and eliminating unsound practices will help reduce the risk of failures that can lead to process shutdowns or spoilage of refrigerated product.

Move over compression ratio, ring valve, and reciprocating compressors. There are two new terms to add to your refrigeration terminology: ‘bi-volt’ and ‘spool.’ The words relate to some of the newest developments in compressor applications.

Minimizing wear on HVAC equipment and maximizing system uptime is the VLT® HVAC Basic drive. It is a robust variable-speed drive solution that delivers highly reliable HVAC performance for basic fan and pump operations, the company said.