background image

DKCD

VD.51.Q1.

12 © Danfoss 10/2003

1

EN 215-1

HD 1215-2

Data sheet

Radiator Thermostats type RA 2000
Valve bodies type RA-FN and RA-G

Application

Robustly built and designed to meet the rigours of
the commercial and industrial sectors, a
comprehensive range of RA2000 radiator
thermostats is available for practically all systems
and installation conditions. Sensors and valve
bodies are packed separately so that they can be
mixed and matched for any duty.

Valve bodies are of nickel-plated brass. The
different types are shown below:

RA-FN For steel pipe. Straight, Vertical angled
from 3/8” to 1” BSP and horizontal angled from 3/8”
to ¾” BSP.
RA-G Straight and Vertical Angled for one-pipe
pumped or gravity systems, ½”, ¾” and 1” BSP.
RA-N Valves with integral presetting facility. See
separate Data Sheet.

In all valves, the pressure pin of the gland seal is
made of chromium steel and this works in a
lifetime-lubricated O Ring seal. The complete gland
assembly can be replaced without draining down
the system.

The protective cap supplied with each new valve
may be used for manual control during installation
only. It should not be used as isolation device. A
manual shut off device is available as a spare part.

Sensors are available as both standard and
tamperproof, built-in and remote sensing models, as
well as remote adjusting. All have range limiting and
locking. They are for use with Danfoss valve bodies
types RA-FN and RA-G.
RA 2000 sensors are not suitable for use with
RA-FR valves.

RA2000 Features
´ Robust Construction
´ Accurate Temperature Control
´ Full Range
´ Range Limiting and Locking
´ Tamper Resistant Models
´ Remote Sensors
´ Remote Wall Adjuster
´ Low Temperature Models
´ Presetting Valves

System

RA-FN straight valve body

RA-FN vertical  angle valve body    RA-FN horizontal angle valve body

All Danfoss RA2000 radiator thermostats are
manufactured to highest standards, and are

Approved to EN 215

approved to the European standard EN 215 and di-
mension standard HD 1215-2, which supersedes BS
6284.

RA 2910 built-in sensor

RA 2920 tamperproof

RA 5062 remote

sensor

temperature  adjuster

RA-G straight valve body

RA-G vertical  angle valve body

Summary of Contents for RA 2000

Page 1: ...hout draining down the system The protective cap supplied with each new valve may be used for manual control during installation only It should not be used as isolation device A manual shut off device...

Page 2: ...ure is 2 C higher at de sign load condition 2 Remote sensors are supplied with all the capillary tube coiled within the sensor When installing the sensor only the length required should be uncoiled 3...

Page 3: ...ase request details The required room temperature is set by rotating the sensor handle to match the scale number with the setting register The correlation between scale Setting the temperature numbers...

Page 4: ...o temperature variations The time constant fig 3 depends on the specific heat and surface of the sen sor At a sudden change of the ambient temperature at time 0 the thermostat will react as shown rela...

Page 5: ...sible To ensure that the valve capacity of a fully opened valve is not significantly greater than that at 2 degrees C P deviation all RA FN valves have a modified valve characteristic This improved va...

Page 6: ...Capacities Use the following sizing charts to select the correct valve for the radiator in question Heat requirement 2 05 kW Temperature drop 11 C Differential pressure across the radiator 0 05 bar 5...

Page 7: ...ard beneath the radiator if free of surface pipes All remote sensors are now supplied with ultra thin capillary Simply pull out the length required 2m max and fix using clips provided Remote temperatu...

Page 8: ...perature adjuster DN D d2 RA FN 10 10 Rp 3 8 R3 8 60 85 27 52 22 47 96 22 27 RA FN 10 UK 10 Rp 3 8 R3 8 103 26 51 22 22 27 RA FN 15 15 Rp 1 2 R1 2 67 95 30 58 26 47 96 27 30 RA FN 15 UK 15 Rp 1 2 R1 2...

Reviews: