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Compact constant temperature controllers ACD20

ACD compact controllers are designed to control a constant temperature in the pipeline. The controller is set using a keypad and a graphic display, which is also used to show measured temperatures and other data. An integrated motor drive is used to control the mixing valve. The controller shall be connected to the power supply by means of a prewired cable with plug.

Read > Why is the heating controller an important part of the heating system?

ACD manual operation coupling

Clutch for manual operation

The manual operation clutch of the ACD is activated by pressing a button (marked in the picture). When the clutch is activated, the control of the mixing valve and, if necessary, of the circulating pump is deactivated, thus saving energy.

ACD quick installation

Quick assembly

The innovative accessories and mounting system allow the ACD Compact Controller to be quickly mounted and dismounted on the mixing valve, largely without the need for tools. Accessories are available for most mixing valves on the market.

ACD setting keys

Setting keys

The keys for adjusting the regulator are located below the manual scroll button. This prevents unwanted access to the controller settings.

ACD plug-in connectors

Plug-in connectors

The compact ACD has a socket built into the housing for plugging in the power cord. This allows easy replacement of the cable in case of damage.

ACD graphic display

Graphic display

The 240 x 240 pixel colour graphic display provides detailed graphics and text in colour.


  • Temperature control of the return water to the boiler or other energy source.
  • Constant temperature control of the inlet to the heating or cooling system.


  • 3 preset hydraulic schemes.
  • Display of temperatures and other operating data.
  • Heating or cooling mode.
  • Overview of temperature trends over the last week.
  • Display of notifications and warnings about the operation of the heating system.
  • Control and signalling of the circulator.
  • Additional sensor to measure the temperature of the source.
  • Setting and signalling the direction of rotation of the mixing valve.
  • Setting the control sensitivity (PID).
  • Can be mounted on different types of mixing valves.
  • Click-to-install system.
  • Automatic screen orientation.
Technical dataACD20
TFT displayYes
Own consumptionMaximum 3,5 W
Standby power consumptionMaximum 0,25 W
Torque6 Nm
Angle of rotation90 < °
Rotation speed2 min 90 < °
Control of the mixing valve3-point PID
Circulation pump control2-point (ON/OFF)
Control outputelectronic relay, 1 (1) A ~, 250 V~
Connection voltage230 V ~, 50 Hz
Maximum own consumption5 W
Clock power supplyBattery CR1025 (Li-Mn) 3 V
Watch accuracy+/-1 s (24 h) at 20 °C
Degree of protectionIP42 after 60529
Safety classI according to EN 60730-1
Type of temperature sensorsPt1000
Housing materialPC - dark grey
Operating temperature0÷50 °C
Storage temperature-20÷65 °C
Product weight1.000 g
Number of pieces per packing unit12 pieces
Electrical connection

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