TM3-R thermostatic mixer control unit with flow meters for low temperature heating systems with fixed-point regulation and thermostatic head, with functions allowing it to react to variations in flow or heat emission, keeping the temperature of the fluid in the radiant panel system constant.
Using the mixing system, the temperature of the supply water of the underfloor heating system (low temperature mixed water) is regulated at a fixed point, by means of the application on the mixing valve of a thermostatic head with a remote temperature sensor.
The capillary temperature sensor inserted in the immersion sleeve detects the temperature of the fluid downstream of the circulator, keeping it at the value set on the head knob.
By acting on the calibration and bypass valve, it is possible to adjust the bypass flow of the underfloor heating system, thus ensuring that the ΔT of the original design is reached.
The TM3-R mixing units can also operate with zero head, connected to an open manifold (hydraulic separator) or to a storage tank (puffer).
The Wilo Para 25/7 electronic circulator keeps the differential pressure at the ends of the circuits of the underfloor heating system constant, with respect to the variation of the required pressure (opening/closing of one or more circuits).
The unit comes complete with an electronic circulator, a thermostatic head with remote sensor for fixed-point regulation and brackets for wall-mounting or for mounting inside a metal box.

Technical specifications:
- Max temperature on primary circuit: 90 °C
- Max operating pressure: 6 bar
- Δp max on primary circuit: 1 bar
- Regulation range of thermostatic head: 20 ÷ 65 °C
-Exchangeable heat output (with ΔT=7°C and Δp=0.25 bar):
10 kW with bypass in position 0
12 kW with bypass in position 5
- Kv with bypass valve in position 5: 4.8
- Thermometer scale: 0 ÷ 80 °C
- Mixing unit head thread: G 1” Female
- Topway manifold head thread: G 1” Female
- Topway manifold outlets: 24x19 male, 50 mm spacing