Vaillant VRT 350, Operating Instructions Manual, Page: 27 / 36

Saving energy 6
0020135485_00 VRT 350 Operating instructions
27
6 Saving energy
6.1 Controlling the room temperature
It is normally not necessary to heat bedrooms or seldom-
used rooms to 20°C.
▶ Adjust the room temperature according to the purpose
of use of the room.
▶ Set the room temperature only as high as would be
enough for your comfort level.
Note
An extra degree would mean increased energy
consumption of about 6%.
6.2 Reducing the room temperature
You can reduce the temperature most simply and reliably
by using controllers with individually selectable time pro-
grammes.
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.
▶ Reduce the room temperature at night and in your ab-
sence.
▶ During the set-back times, set the room temperature to a
lower temperature than during full heating times.
▶ During a longer absence, set the temperature using the
«Days away from home scheduling» function.
6.3 Uniform heating
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,
windows, roofs and floors. The capacity of the radiators
in the heated rooms is obviously not enough for such an
operating mode. It is then not possible to heat up the
heated rooms sufficiently (the same effect arises when
doors between heated and unheated/barely heated rooms
are left open).
▶
Heat all rooms in your dwelling evenly and according to
their use.
6.4 Using thermostatic radiator valves and
weather compensators or room thermo-
stats
Thermostatic valves on all radiators maintain the room
temperature exactly once they have been set. If the room
temperature rises above the value set on the sensor head,
the thermostatic radiator valve shuts off automatically;
when the temperature drops below the defined value, it
opens again.
Exception: The thermostatic valves on the radiators in the
room in which the controller is fitted must be turned fully
on. The radiators are then controlled by the controller and
thus maintain the set room temperature.
▶ Adjust the room temperature to your individual require-
ments using thermostatic radiator valves. You can use
thermostatic radiator valves or a room thermostat to
ensure the economical operation of your heating install-
ation.
6.5 Do not cover controllers
The controller must be able to detect the circulating air
unhindered. Covered thermostatic radiator valves can be
equipped with remote sensors and thus still work.
▶ Do not cover your controllers with furniture, curtains or
similar objects.
6.6 Ensuring economic hot water generation
▶ Set the desired «Hot water circuit» temperature of your
domestic hot water cylinder only to the temperature you
actually need, and under no circumstances higher than
60 °C.
▶ You should also use the «Timer programs» function for
hot water generation in «Automatic mode» or «Summer
mode». Set the time period so that the water is brought
to the desired «Hot water circuit» temperature shortly
before it is needed, e.g. in the morning after getting up
and in the evening after you return home.
▶ If you do not need any hot water for a longer period of
time, switch hot water generation off.
▶ If you need hot water rarely or outside the set time peri-
ods, use the function «Cylinder boost».