Heating support for hydronic

Frequently asked questions

Thermostatic Radiator Valves

Control of the space temperature at a comfortable level is easily accomplished by adjusting the dial clockwise or counterclockwise.

The dial has a numbered scale of 1 to 5 corresponding to temperatures of approximately 57°F to 79°F (14°C to 26°C).

The operator or sensing element must not be:

  • in a drafty location
  • covered
  • installed above a heat source

The correct orientation direction is dependent upon the selected operator type. See the mounting guide visual below for reference.

correct RA2000 opeartor mounting orientation

There are a couple of reasons for overheating depending upon which system you have:

For One or Two-pipe systems:

  • Ensure operator is not in a cold or drafty spot
  • Check on dial adjustment knob as setting could be set too high
  • Add a vacuum breaker which allows steam supply to cycle properly

For Hot Water systems:

  • Check operator installation as it may not be seated properly

For 'under heating' issues: 

  • Ensure radiator is not blocked by furniture, heavy curtains, etc.
  • Ensure operator is not in a 'hot' spot or wrong sensor location for that product selection.


  • Product photo of the thermostatic valves by Danfoss
    Thermostatic valves

    Thermostatic valves are a simple and reliable control solution requiring neither electricity nor control air. An example of application is automatic control of water temperature in cooling systems. The valves are available with remote or built-in sensor.

  • Hydronic room controls
    Room controls for hydronic floor heating

    To ensure hydronic (water based) floor heating systems achieve the expected high level of comfort and low energy consumption, good room temperature controls are essential.  Danfoss thermostats control the room temperature through heat radiating from the floor system.

  • Thermostatic radiator valves
    Thermostatic radiator valves

    Robustly built and designed to meet the rigors of the residential, commercial and industrial sectors, a comprehensive range of Danfoss RA2000 thermostatic radiator valves is available for hot water, one-pipe steam, and two-pipe low pressure steam systems.

  • RA2000 radiator operators
    Radiator operators

    Danfoss RA2000 radiator operators maintain constant desired room temperatures, individually room by room and help to reduce energy consumption.

  • ESBE Motorized control valves and actuators
    Motorized control valves and actuators

    ESBE motorized control valves (MCVs) ensure improved water temperature control in a variety of applications. The comprehensive range of ESBE MCVs and motorized actuators are used in: radiant heating, indirect domestic hot-water, chilled water, set-point application, and mixing/diverting applications.

Contact Us

Phone: 1-888-DANFOSS (326-3677) - choose option #3 for heating

  • Technical support: heating.ts.hydronic.na@danfoss.com
  • Customer service: heating.cs.na@danfoss.com

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