
Supply and return temperature controls
Danfoss FHM mixing shunts are used for regulating the correct flow and supply temperature in hydronic floor heating systems. They are designed to fit our FH type manifolds and together create a compact, low-temperature floor heating distribution unit.
The mixing shunts accurately mix warm water provided from the heat source and the cooler water returning from the floor heating system. As a result, the supply temperature for the floor heating system is regulated to the desired temperature.
There are different mixing shunts to choose from. They vary in terms of capacity and circulation pump. A possible safety thermostat protects the floor against excessively high temperatures and the electronic variable speed pump adjusts itself for correct flow in the circuits. A standard 3-speed pump is also available. The built-in check valve ensures correct flow direction. An air vent on top and a thermometer in the supply completes the mixing shunt.
The compact design and flexibility allows mounting of the mixing shunt directly to the manifold on either the left or right side. The primary supply and return pipe connections can come from the side or below.
Midishunts
Where the FHM compact mixing shunts are mostly used for floor heating systems containing multiple circuits, Danfoss also offers even smaller midishunts. These are designed for 1 to 3 floor heating circuits and contain both a small mixing shunt as well as 1, 2 or 3 group manifolds and CF2+ wireless control system Master Controller, all pre-assembled.
Features and benefits
Made-to-match manifolds: The dimensions of the manifolds and mixing shunts match exactly, so that you can establish a low-temperature floor heating distribution unit according to your needs.
Compact dimensions: The dimensions of both the mixing shunts and FH manifolds establish a very compact distribution unit which can be fitted into small spaces.
Pre-assembled midishunt: The easiest way to establish a small floor heating system. It only requires connection to the main supply and return pipe and assigning one or more CF2+ room thermostats to control the room temperature.
Products shown: 5
FHM-C1 / FHM-C2
The Danfoss compact mixing shunts are used for regulation of flow and supply temperature in hydronic floor heating systems. The compact, flexible design allows mounting the mixing shunt directly to the manifold on both left and right side, with the primary pipe connection from the side or below. A self-acting proportional regulator is used to regulate the supply temperature. The regulator ensures that the desired supply temperature to the underfloor heating system always remains constant. A built-in check valve ensures correct flow direction. An air-vent on top and a thermometer completes the mixing shunt. An optional thermostat protects the floor against too high temperatures.
FTC
The flow temperature control (FTC) is used to regulate & maintain fluid temperature for hydronic floor or radiator heating systems. FTC is a self-acting thermostatic sensor, which can be combined with two-way valve body types RA2000 (normally used with straight valve configuration) & RA-C. The water temperature is measured by a surface sensor, which is mounted directly on the pipe surface by means of a strip (enclosed with the product). The snap-lock connector of the sensor element allows a quick and firm connection to the valve without the need for tools.
Midishunts
The Danfoss Midi shunts are used for control of flow and supply temperature in hydronic floor heating systems. The compact, midi shunt comes premounted for 1-circuit ready to mount on the wall and fittings for pipe connection (20 × 2 mm). The shunts self-acting proportional thermostatic control valve is used to control the supply temperature. The thermostatic sensor ensures that the desired supply temperature to the underfloor heating system always remains constant.