Danfoss RAS-D2 Combi User manual

INSTRUCTION
Radiator Thermostat RAS-D2Combi
BI-DIRECTIONAL VALVE WITH FLOW-SELECTABLE FEATURE
1
Close all radiator valves by turning
the valve cover cap clockwise.
Leave system to cool.
2
Start boiler/heating.
4
Remove cap and turn setting ring
according to the drawings - the
setting ring is turned by hand only.
013R9398 013R9398
Installation of valve
The valve is a bi-directional valve * and can be
installed horizontally or vertically in either the flow or
return pipe.
A built in flow direction selection feature can be used
to eliminate the risk of water hammer.
We recommend using a flat faced adjustable
spanner and a soft cloth to protect the chrome
surfaces when tightening up the connections.
Troubleshooting
In the unlikely event of water hammer being encoun-
tered turn the setting ring (see diagram 4) to the
other setting.
Alternatively if commissioning the whole system,
establish the flow direction through each valve using
the diagrams below.
If the flow direction needs to be changed there is no
need to remove the valve, simply turn the setting ring.
* Maximum pressure drop should not exceed 0.45 bar Danfoss DKCD 3/2005 VIULE402
Setting ring
5
Repeat step 3 and 4 until all valves have
been set correctly. Sensor may now be
fitted or the valve cap temporarily refitted.
3
Open one valve and determine
flow direction. Which pipe heats
first?

Fitting the Sensor
1. Remove cap
from valve and
turn sensor to
2. 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.
3. Whilst holding the
sensor firmly on
the valve secure
connection by
tightening the
Allen screw using
the enclosed key.
4. Set desired room temperature.
Removing the Sensor
Loosen the Allen screw (3).
The sensor can now be separated from the valve.
Setting the desired room temperatures
The desired room temperature is set by turning
the head. The temperatures obtained are ap-
proximately:
Installation Guide User Guide
Do not cover the thermostat
The thermostat opens and closes as determined
by the temperature around it. Therefore the sen-
sor must never be hidden behind thick curtains,
furniture, etc. Alternatively a thermostat with
remote sensor should be used.
Lockshield valve RLV-D is included
in codes: Code no’s 013G6018 and 013G6019
Balancing
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.
Removal of
protective cap