Danfoss RAS-B2 Dynamic Radiator Pack and Dynamic TRV Instructions

June 11, 2024
Danfoss

Danfoss RAS-B2 Dynamic Radiator Pack and Dynamic TRV Instructions
Danfoss RAS-B2 Dynamic Radiator Pack and Dynamic TRV

Pressure Independent Radiator Valve

Danfoss RAS-B2 radiator valve is a pressure independent radiator valve, designed for use in 2 pipe heating systems together with Danfoss TRV. RAS-B2 dynamic valves are fitted with a flow limiting device for presetting of the maximum water flow. The valves are available with maximum water flow of 10 – 135 l/h. RAS-B2 has a built-in pressure regulator, which keeps the differential  pressure at a constant level of 0.1 bar, maintaining the set flow.

Installation of valve

The Danfoss RAS-B2 radiator valve can be fitted either vertically or horizontally giving the installer total flexibility.
Installation of Valve

If you are not installing a Danfoss lockshield valve (supplied in sets code, 013G7662 & 013G7663) ensure that the lockshield is fully open. No balancing on the lockshield/ return pipe.
Keymark reference: This package contains sensor 013G6040 and valve 013G7677

Presetting

The presetting values of RAS-B2 valves can be adjusted easily and accurately without the use of tools (default setting = N).

Presetting can be selected in steps from 1 to 7:

  • Remove protective cap / thermostatic sensor.
  • Find reference mark ( ).
  • Turn setting ring until the aquired presetting aligns with the reference mark.

At setting N the valve is fully open. This setting can be used as a flushing position, if the system has to be flushed out because of dirt problems. When the thermostatic sensor has been installed, the presetting is protected against unintended regulation.
Instructions

RAS-B² Pack Contents:

Code Number| Sensor| Valve| Lockshield| Fitting Diameter
---|---|---|---|---
013G7660| RAS-C2| RA-DV| –| 15mm
013G7661| RAS-C2| RA-DV| –| 10mm
013G7662| RAS-C2| RA-DV| RLV-D| 15mm
013G7663| RAS-C2| RA-DV| RLV-D| 10mm

Sensor Installation

Fitting the Sensor

  1. Remove cap from valve and turn sensor to
    Sensor Installation

  2. Make sure union nut is turned loosely up towards the sensor body until it is only slightly free of the lower part of the sensor body.
    Sensor Installation

  3. Press the sensor firmly onto the valve. Sensor horizontal: ensuring that the scale pointer is at top. Sensor vertical: ensuring that the scale pointer is at the front.
    Sensor Installation

  4. Whilst holding the sensor firmly on the valve secure connection by turning union nut clock-wise by hand.

  5. Whilst still holding the sensor firmly on the valve fully tighten grey union nut using parrot nose pliers.

  6. Set desired room temperature.

Setting the desired room temperatures
The desired room temperature is set by turning the head.
The temperatures obtained are approximately:
Setting the desired

Do not cover the thermostat
The thermostat opens and closes as determined by the temperature around it. Therefore the sensor must never be hidden behind thick curtains, furniture, etc. Alternatively a thermostat with remote sensor should be used.

Positive SHUT-OFF feature:
The head can be turned past the setting (a slight resistance will be felt) to setting “0” at which point the water flow is shut off completely. After also shutting the lockshield valve the radiator may be drained and removed for maintenance and decoration purposes.

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Support

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed.
All trademarks in this material are property of the respective companies. Danfoss and all Danfoss logotypes are trademarks of Danfoss A/S. All rights reserved

Danfoss Limited
Heating Segment
heating.danfoss.co.uk
+44 (0)1895 617000
E-mail: customerservice.uk@danfoss.com

References

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