Stelrad Radiator Thermostat RAS-D2 Combi Pack, Radiator Pack Instructions

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INSTRUCTION  

Radiator Thermostat RAS-D² Combi Pack / Radiator Pack  

BI-DIRECTIONAL ANGLED VALVE WITH FLOW-SELECTABLE FEATURE  

Installation of valve  

Troubleshooting  

The valve is a bi-directional valve * and can be installed In the unlikely event of water hammer being encountered  

horizontally or vertically in either the flow or return pipe.  

turn the setting ring (see diagram 4) to the other setting.  

A built in flow direction selection feature can be used to Alternatively if commissioning the whole system, establish the  

eliminate the risk of water hammer. We recommend using a flat flow direction through each valve using the diagrams below.  

faced adjustable spanner and a soft cloth to protect the chrome If the flow direction needs to be changed there is no need to  

surfaces when tightening up the connections.  

remove the valve, simply turn the setting ring.  

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3

Open one valve and determine flow  

direction. Which pipe heats first?  

Close all radiator valves by turning  

the valve cover cap clockwise. Leave  

system to cool.  

Start boiler/heating.  

Setting ring  

4

Remove cap and turn setting ring ac-  

cording 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  

013R9689 | 12/2022  

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General	Details
Name	Stelrad Radiator Thermostat RAS-D2 Combi Pack, Radiator Pack Instructions
Make	Stelrad
Language	English
Filetype	PDF (Download)
File size	0.14 MB

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• ALL THERMOSTAT INSTRUCTIONS & USER MANUALS
• Stelrad

Stelrad Radiator Thermostat RAS-D2 Combi Pack, Radiator Pack Instructions Overview

Summary of Contents

• Page 1: Instruction for radiator thermostat RAS-D combi pack/radiator pack. 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. If the flow direction needs to be changed, there is no need to remove the valve, simply turn the setting ring. Open one valve and determine flow direction. Close all radiator valves by turning the valve cover cap clockwise. Start boiler/heating. Remove cap and turn setting ring according to the drawings. Repeat steps until all valves have been set correctly. Maximum pressure drop should not exceed 0.45 bar.
• Page 2: Installation guide User guide Fitting the sensor Setting the desired room temperatures The desired room temperature is set by turning the head. The thermostat opens and closes as determined by the temperature around it. The sensor must never be hidden behind thick curtains, furniture, etc. Positive shut-off feature: the head can be turned past the setting to shut off water flow completely. What is a thermostatic radiator valve (TRV)? TRVs sense the air temperature around them and regulate the flow of water through the radiator. TRVs need a free flow of air to sense the temperature, so they must not be covered by curtains or blocked by furniture.