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Select actuators have pressure independent control characteristics combined with an integrated differential pressure sensor to calculate and deliver designed flow regardless of pressure fluctuations in the system.
This K-12 building automation troubleshooting experience turned into a case of “show and tell” that nobody wants at their own school, so take notes on both the causes and the solutions.
Carrier is offering an electronically commutated motor (ECM) direct-drive fan option for the Aero® 39M commercial air handler product line. According to company officials, adding the new ECM fan option enables customers to further improve the system’s energy efficiency. Onboard electronics determine the position of the rotor, which then provides an electronic pulse to actuate the motor windings.
Cleaver-Brooks has launched the ClearFire®-CE (CFC-E) condensing boiler. The company says the boiler can achieve up to 99% efficiency due to its enhanced AluFer® firetube heat exchanger and dual temperature returns. When utilized, dual temperature returns increase condensing in a hot water boiler, raising efficiency by 6% or more compared to a traditional single-return design, according to officials.
Bonomi North America is introducing a new series of NSF-Certified butterfly valves with factory-installed electric or pneumatic actuators for potable water applications with high flow requirements. The new N500 Series wafer and N501 lug body valves feature ductile iron body construction with EDPM rubber seats. They are available with stainless steel disc (N500S/N501S) or nylon-coated disc (N500N/N501N). All are approved to NSF /ANSI 61,372. Sizes range from 2 in through 12 in.
