Tento web používá k poskytování služeb, personalizaci reklam a analýze návštěvnosti soubory cookie. Používáním tohoto webu s tím souhlasíte.




2- circuit controller of valves


Two-circuit regulator for three/ four-way valves with a selection of the type of regulation for each heating circuit. Allows you to control the boiler and associated pumps.

5 999 Kč 4 958 Kč without VAT

Description of product

Properties of R3V-421:

The controller enables according connected temperature sensors (max. 8) controlling three-way / four-way valves, pumps, switching boiler and to regulation the temperature according to the selected  function.
It can be used for example in the following systems
- single and multiple circuit systems (radiators, floor heating)
- for discharging of storage tank
- for solid fuel boilers (regulation of return water temperature)
- where, does not regulate the heat according to outdoor temperature (equithermal regulation=weather-compensated reg.)


Type of regulation:

  • Control according to room temperature with a temperature sensor (PI control)
  • Control depending on the valve with respect to the room thermostat
  • Weather-compensated control according to room temperature with a temperature sensor
  • Weather compensated according to outdoor temperature with respect to the room thermostat
  • Control by the return temperature with temperature sensor
  • Control by the return temperature with respect to the room thermostat
  • Service mode
  • Summer mode

Advantages R3V-421:

  • 7 weekly programs, 6 temperature changes for every day
  • Select language (CZ/EN)
  • Mode AUTO/ MANU/ OFF
  • Monitoring the maximum boiler temperature
  • Automatic adaptation of valve
  • Backup running clock after a power failure is more than 4 hours
  • Anti-freeze function
  • Automatic protection against limescale
  • Short-term changes in temperature
  • Information on temperatures at the sensor, the calculated temperature at the valve and valve position in %
  • Power supply 5 V/DC 500 mA (not include)
  • Possibility to connect up to 8 temperature sensors (included as sensors KO, VT, M1, V1, Z1 can be purchased at additional www.elbock.cz)
  • Connection option for remote control thermostat
  • Max. output load is 5 A.



Technical specification

Power supply universal / 5,0 V / 0.5 A, DC (AD05-DIN not included)
Thermostat type wire
Accuracy 0,5 °C
Dimensions (LxWxD) 160x90x58 mm
Protection IP20
Working temperature 0 °C to 40 °C
Switching element relay
Output 5 A / 250 VAC
Max. the number of temp. sensors 8 (for temp. sensors/ thermostats)
Range of adjustable temperature 2 °C to 99 °C
Consumption 1 VA

Downloads files

File name Size
r3v-421_v1002.pdf 534.42 kB Download
r3v_421_obrys.jpg 786.87 kB Download
r3v_421_v1003_cz.pdf 467.42 kB Download

You have any question?

* Ochrana proti robotům