Danfoss RAS-D2 Combi Instruction

INSTRUCTION

Radiator Thermostat RAS-D2 Combi

013R9399

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.

Troubleshooting

In the unlikely event of water hammer being encoun­tered 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.

013R9399

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.

2

Start boiler/heating.

3

Open one valve and determine
flow direction. Which pipe heats
first?

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.

* Maximum pressure drop should not exceed 0.45 bar

Danfoss DKCD 03/2005 VIAQA102

Installation Guide User Guide

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.

Setting the desired room temperatures

The desired room temperature is set by turning
the head.

The temperatures obtained are ap-

proximately:

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.

Lockshield valve RLV-D is included
in codes: Code no’s 013G6016 and 013G6017

4. Set desired room temperature.

Removing the Sensor

Loosen the Allen screw (3).
The sensor can now be separated from the valve.

Removal of
protective cap

Balancing

This package contains
Sensor Chrome: 013G6170 or - Chrome/RAL 9016: 013G6176
and valve RA-FS - Chrome: 013G6282