Danfoss RET1000 MD User manual

RET1000 MD
Electronic dial setting thermostat, delayed start
User Guide
Danfoss Heating

RET1000 MD
2
For a large print version of these instructions
please call Marketing on 0845 121 7400.
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Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

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What is a room thermostat?
... an explanation for householders. A room thermostat simply switches
the heating system on and o as necessary. It works by sensing the
air temperature, switching on the heating when the air temperature
falls below the thermostat setting, and switching it o once this set
temperature has been reached.
Turning a room thermostat to a higher setting will not make the
room heat up any faster. How quickly the room heats up depends on
the design of the heating system, for example, the size of boiler and
radiators.
Neither does the setting aect how quickly the room cools down.
Turning a room thermostat to a lower setting will result in the room
being controlled at a lower temperature, and saves energy.

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The heating system will not work if a timeswitch or programmer has
switched it o.
The way to set and use your room thermostat is to nd the lowest
temperature setting that you are comfortable with, and then leave it
alone to do its job.The best way to do this is to set the room thermostat
to a low temperature – say 18°C – and then turn it up by one degree
each day until you are comfortable with the temperature. You won’t
have to adjust the thermostat further. Any adjustment above this
setting will waste energy and cost you more money.
If your heating system is a boiler with radiators, there will usually
be only one room thermostat to control the whole house. But you
can have dierent temperatures in individual rooms by installing
thermostatic radiator valves (TRVs) on individual radiators. If you don’t
have TRVs, you should choose a temperature that is reasonable for the
whole house. If you do have TRVs, you can choose a slightly higher
setting to make sure that even the coldest room is comfortable, then
prevent any overheating in other rooms by adjusting the TRVs.
Room thermostats need a free ow of air to sense the temperature,
so they must not be covered by curtains or blocked by furniture.
Nearby electric res, televisions, wall or table lamps may prevent the
thermostat from working properly.

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LED Indicators
Power On – Green (bottom right)
Thermostat output on – Red (top left)
Delayed Start active - Green flashing (bottom right)
Delayed Start
An energy saving feature which automatically delays the heating
start time, depending on how close to set-point the ambient
room temperature already is. If the green LED ashes once every
3 seconds the delayed start function is in operation. Delayed
start can be cancelled by turning the setting dial. Delayed start
will operate again on timer control next ON time.

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Turn setting dial to required temperature.
For best comfort control initially set the dial to a lower
temperature than desired, say 18°C. Then turn it up by one
degree each day until a comfortable temperature is reached.
Setting the temperature

Part No 45043v01 04/15
Danfoss Ltd
Ampthill Road
Bedford MK42 9ER
Tel: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.heating.danfoss.co.uk
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