Operation; Checks Before Start-Up; Opening The Shut-Off Valves; Checking Water Level - Vaillant ecoCRAFT VKK GB 806/2-E-H Operating Manual

3 Notes on the installation and operation

4 Operation

Do not cover regulators
Do not cover your regulators with furniture, drapes or
similar objects. The room air must circulate unhindered.
Covered thermostat valves can be equipped with remote
sensors and thus still work.
Appropriate hot water temperature
The warm water should only be heated up to the extent
that is necessary for use. Any further heating results in
unnecessary power consumption and hot water
temperatures of more than 60 °C also lead to increased
lime scale production.
Energy-conscious use of water
Energy-conscious use of water can reduce your bills
considerably.
For example, taking a shower instead of a bath: Whereas
about 150 litres of water are required for a bath, a
modern shower equipped with water saving fittings only
requires a third of this water quantity.
By the way, a dripping water tap wastes up to 2000
litres of water and a leaking toilet flush up to 4000 litres
of water each year. On the other hand, a new seal only
costs a few cents.
Run circulation pumps only if needed
Hot water piped systems are often fitted with so-called
circulation pumps. These provide continuous re-
circulation of hot water in the piping system so that hot
water is immediately available, even at drawing-off
points which are located far away.
These circulation pumps can also be used with the
Vaillant ecoCRAFT. There is no doubt that they provide
increased comfort for hot water heating. Please bear in
mind, however, that these pumps consume electricity.
And circulating hot water that is not used cools off when
passing through pipes and then needs to be reheated.
Therefore, circulation pumps are to be operated only
when hot water is actually needed for the household.
Individual time programmes can be set using timers
which most circulation pumps have fitted to them or
with which they can be retro-fitted. Weather
compensators often have ancillary functions for
controlling circulation pump timings. Ask your heating
engineer about this.
Ventilating residential spaces
During the heating period, open windows only for
ventilation and not for temperature regulation. A brief
impact-ventilation is more effective and energy-saving
than windows that are kept open for a long time. We
recommend that the windows be opened fully for a short
period. During ventilation, close all thermostat valves in
the room or set the room regulator to minimum
temperature. In this way, there will be adequate
ventilation without unnecessary cooling and energy loss
(e.g. by the heating switching on during the ventilation
procedure).
6
4 Operation
4.1

Checks before start-up

4.1.1

Opening the shut-off valves

Note!
The shut-off valves are not included in the
scope of supply of your unit. They are fitted by
your heating engineer in the installation. He
should show you the location and how to
operate these components.

4.1.2 Checking water level

• Check the water level (fill pressure) of the installation
at the pressure gauge external to the boiler.
Your heating engineer has shown you the location of the
pressure gauge. It is not integrated into your unit. For
the heating system to operate properly, the indicator on
the pressure gauge should be at approx. 3 bar when the
system is cold. If it is less than 0.8 bar, then water
should be added.
There is a water pressure switch integrated in the unit
which prevents the unit from starting up if the system
pressure < 0.2 bar. This is shown in the display as E26.
At water pressures > 0.8 bar the fault display disappears.
If the heating system extends over several storeys, the
system may require a higher filling pressure. Ask your
engineer for details.
Operating manual ecoCRAFT