Danfoss RAS-D2 Combi Instruction

INSTRUCTION
Radiator Thermostat RAS-D
BI-DIRECTIONAL VALVE WITH FLOW-SELECTABLE FEATURE
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.
1
Close all radiator valves by turning
the valve cover cap clockwise.
Leave system to cool.
4
Remove cap and turn setting ring
according to the drawings - the
setting ring is turned by hand only.
5
Repeat step 3 and 4 until all valves have
been set correctly. Sensor may now be
fitted or the valve cap temporarily refitted.
* Maximum pressure drop should not exceed 0.45 bar
2
Combi
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.
2
Start boiler/heating.
3
Open one valve and determine
flow direction. Which pipe heats
first?
Setting ring
Danfoss DKCD 03/2005
VIAQA102