Vaillant ecoTEC pro, Operating Instructions Manual

Energy saving tips

Operating instructions ecoTEC pro 0020129673_00 

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Energy saving tips

Fitting a weather compensator

Weather compensators regulate the heating flow tempera-
ture according to the outside temperature. Thus it is 
ensured that heat in excess of what is required at that 
moment is not generated. In addition, desired heating and 
set-back phases (e.g. at night) are automatically turned on 
and off by using integrated time programmes.
Weather compensators combined with thermostatic radia-
tor valves are the most economical form of heating regula-
tion.

Operating the heating system in energy-saving 
mode

>

Reduce the room temperature for the night and for peri-
ods when you will be absent.

The simplest and most reliable way is to be able to reduce 
the room temperature using the controller with individually 
selectable timer programmes.

>

At such times, set the room temperature approx. 5 °C 
lower than during full heating times.

If you reduce the room temperature by more than 5 °C, you 
do not save any additional energy, because increased heat-
ing capacities would then be required for the next full heat-
ing period. Only for longer absences, e.g. during holidays, is 
it worthwhile to lower the temperatures further.
Caution!

>

In winter, make sure that adequate frost protection is 
maintained (

¬ Section 5.7

).

Room temperature

>

Set the room temperature only as high as would be 
enough for your comfort level.

Each extra degree would cause an increased energy con-
sumption of about 6%.

>

Adjust the room temperature according to the purpose 
of use of the room. 

For example, normally, bedrooms or rooms that are seldom 
used are heated to 20 °C.

Uniform heating

>

Heat all rooms in your dwelling evenly and according to 
their use.

If you are only heating one room or individual rooms in 
your dwelling, the unheated adjoining rooms are also 
heated in an unregulated manner through walls, doors, win-
dows, roofs and floors. The capacity of the radiators in the 
heated rooms is obviously not enough for such an operat-
ing mode. It is then not possible to heat up the heated 
rooms sufficiently (the same effect arises when doors 
between heated and unheated/partially heated rooms are 
left open).

Thermostatic radiator valves and weather compen-
sators or room thermostats

Thermostatic valves on all radiators maintain the room tem-
perature exactly once they have been set. You can adjust 

the room temperature to suit your individual requirements 
and ensure effective operation of your heating system 
using thermostatic valves in combination with a room ther-
mostat or a weather compensator. 
How the thermostatic radiator valve works: If the room 
temperature rises above the value set on the sensor head, 
the thermostatic radiator valve shuts off automatically, and 
when the temperature drops below the defined value, it 
opens again.

Do not obstruct the controller

>

Do not obstruct your controller with furniture, curtains 
or other objects.

The controller must be able to record the circulating room 
air unhindered. Covered thermostatic radiator valves can be 
equipped with remote sensors and thus still work.

Ventilating living rooms

>

During the heating period, open windows only for venti-
lation and not to regulate the temperature.

Brief ventilation is more effective and energy-saving than 
leaving windows open for a long time.
Close all the thermostatic valves in the room during ventila-
tion.

>

If you have a room thermostat installed, set it to mini-
mum temperature.

This guarantees adequate exchange of air without unneces-
sary loss of energy and cooling off.

Setting the operating mode

>

In warmer seasons, when the dwelling needs no heating, 
turn the heating to summer mode.

Heating mode is then switched off. The boiler and system 
remain ready for operation for the domestic hot water gen-
eration.

Setting the hot water temperature

>

Only heat the warm water up to the extent that is neces-
sary for use.

Any further heating results in unnecessary power consump-
tion and domestic hot water temperatures of more than 
60 °C also lead to increased limescale sediment.

Switching on Comfort mode

Comfort mode immediately supplies you with hot water at 
the required temperature, without you having to wait for 
the water to heat up. For this, the hot water heat exchanger 
is kept at a preselected temperature level. 
If you do not need hot water for a long period, it is recom-
mended to turn off comfort mode to save energy further.