Danfoss RAS-C2 Combi User Manual

INSTRUCTION
Radiator Thermostat RAS-C
2
Combi
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.
3
Open one valve and determine
flow direction. Which pipe heats
first?
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 fit-
ted or the valve cap temporarily refitted.
Setting ring
013R9355 013R9355
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.
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.
* Maximum pressure drop should not exceed 0.45 bar
VISXM302/Danfoss DKCD 05/2011
Keymark reference: This package contains sensor 013G6040, valve 013G6281 (15mm) or valve 013G6283 (8/10 mm)

Danfoss RAS-C2 Combi Specifications

General

Type	Radiator Thermostat
Connection Size	1/2 inch
Frost Protection	Yes
Color	White
Hysteresis	0.5°C
Approvals	EN215
Temperature Range	8 - 28 °C
Sensor Type	Liquid

Summary

Bi-Directional Valve with Flow-Selectable Feature

Installation and Flow Direction

Details the bi-directional valve's installation options and the process for selecting flow direction to prevent water hammer.

Troubleshooting Water Hammer

Provides guidance on resolving water hammer by adjusting the valve's setting ring.

Installation Guide

Fitting the Sensor to the Valve

Step-by-step instructions for correctly attaching the thermostat sensor to the radiator valve.

Removing the Sensor

Procedure for safely detaching the thermostat sensor from the valve using the locking mechanism.

User Guide

Setting Room Temperatures

Explains how to set the desired room temperature by turning the thermostat head.

Thermostat Usage Recommendations

Advises on not covering the thermostat and details the positive shut-off feature for maintenance.

Lockshield Valve Information

Provides details about the lockshield valve (type RLV-D) and its associated product codes.

Understanding Thermostatic Radiator Valves (TRVs)

Explains the function of TRVs in regulating room temperature and how they interact with heating systems.