Danfoss is continuously striving to innovate and provide solutions that enhance efficiency and ease in HVAC systems. The company’s latest product, the AB-QM 4.0 CO6 Flexo, is a testament to this commitment. This standardized prefab connection set is designed to streamline the design, installation, and servicing of hydronic HVAC systems, specifically radiant panels, and chilled beams in four-pipe heating and cooling change-over systems.
For that, the set is equipped with the high-accuracy AB-QM 4.0 pressure independent balancing and control valve as well the ChangeOver6 six-way ball valve. The valves are prefabricated into a compact, pressure tested, connection set with six space optimized bended 18mm pipes; four to connect to the HVAC heating and cooling, and two to connect to the radiant panel or chilled beam. All of them can be rotated for maximum installation flexibility.
You can choose from sets with 18 mm connections for press fit, or ½” internal thread as well from sets with Low Flow range between 20-200 l/h or Normal Flow range between 65-650 l/h. Depending on the demand situation, either heating or cooling is allowed into the terminal unit. During the change-over sequence, crossflow is prevented.
The change-over sequence is determined by stand-alone or Building Management System (BMS) room temperature controllers. They control Danfoss actuators mounted on both valves in the connection set. For easy connection with a BMS the digital NovoCon® actuators are used. In the case of stand-alone temperature controllers or BMS with analogue I/O’s, the AME 110NL(X) modular 0-10V actuators combined with the ChangeOver6 can be used.
