Heating circuit HeatBloC® MCom

Heating circuits for hydraulic balancing of heating installations

Do you often need to vent your radiator? The radiator is not warm enough? Or the radiator makes noises? Many radiators are not hydraulically balanced, therefore they do not heat equally. For the hydraulic balancing of a heating installation, not only the radiators must be balanced, but also the heating circuits at the distribution manifold. Ask your heating engineer about a hydraulic balancing of your heating installation. For an automatic, hydraulic balancing on the distribution manifold level as well as on the radiator level, the PAW heating circuit HeatBloC® MCom offers the perfect prerequisites.

In short: The HeatBloC® MCom system combines the balancing on both levels and ensures a comfortable heating of all rooms and an energy-efficient operation of your heating system! With the modernisation of your heating system, you can save up to 50 % of pump energy! In addition, modernisations are currently promoted with the BEG (German federal subsidies for efficient buildings) of the BAFA.


3 steps to a hydraulically balanced heating system:

  • Hydraulic balancing on the distribution manifold
  • Hydraulic balancing of the radiators
  • Hydraulic radiator balancing with the PAW Connect app

Your advantages with the HeatBloC® MCom:

  • Comfortable adjustment of the radiators
  • Electronic control of the differential pressure
  • Fast and easy regulation of the radiators
  • 30% BAFA subsidies (subsidies only with Grundfos pump)

Hydraulic balancing of the distribution manifolds

Our HeatBloC® MCom product series are equipped with an electronic control of the differential pressure. The MCom controller measures the differential pressure between the flow and the return and appropriately presets the revolution speed of the pump via a PWM signal. The resulting decoupling of the consumer circuits of the generator circuit means that the flow rate in the consumer circuit is only influenced by the thermostatic valves, i. e. the heat demand. Modifications of the pressure loss in the generator circuit by a change of the mixing valve position or of the total flow rate are automatically adjusted. The automatic, dynamic balancing of the distribution manifold avoids the mutual influence of the heating circulations. The high valve authority of the thermostatic radiator valves results in a stable control behaviour of the latter. Compared to a mechanical differential pressure controller, a HeatBloC® MCom saves at least 50 % of pump energy with the same additional costs, while assuring the same comfort.

Hydraulic balancing of the radiators

The HeatBloC® MCom supports you when you carry out the hydraulic balancing, whether with preset thermostatic valves or with dynamic valves. Preset thermostatic valves are usually set to a differential pressure of 100 mbars, dynamic thermostatic valves need a minimum differential pressure of for example 150 mbars. Just set the corresponding value at the controller and start the hydraulic balancing. Alternatively, our PAW Connect app supports the metrological, hydraulic balancing of the radiators. Therefore, all you need are restrictable radiators and our communication set. The communication set establishes its own WLAN and serves as an interface between the MCom controller and the app. Thanks to the newest pump technology from Grundfos, which is implemented in the UMP3 and in the UPMXL, you don't even need a flow rate sensor. The pumps are used in heating circuits with the nominal diameters DN 25 and DN 32 (UMP3) as well as DN 40 (UPMXL).

Step 1: Installation & data acquisition

Record all heated rooms and enter the standard heating load, the desired inside temperature and the standard thermal output of the radiators. The balancing of the distribution manifolds is the basis for the balancing of the radiators. With the completion of the installation and the acquisition of all important data, the balancing of the distribution manifolds works automatically.

Step 2: Balancing of the radiators

The app supports the balancing of the individual radiators. For this purpose, take your smartphone with you to the radiator and reduce it to the specified value.

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