Vaillant ecoTEC plus SERIES Operating Instructions Manual - page 19
Operation
Operating instructions ecoTEC plus 0020116701_00
19
5
> Use the plus button
to set your required
heating flow temperature.
> Confirm the change by pressing the right-hand selection
button
("OK").
5.7
Temporarily shutting down the boiler
b
Caution!
Risk of damage caused by frost.
Anti-freeze and monitoring devices are only
active while the boiler is connected up to
the power mains and the on/off switch is
on.
> Do not isolate the boiler from the power
mains.
> Leave your boiler switched on at the on/
off switch.
> Only switch the boiler on and off in nor-
mal mode using the controller.
> Make sure that the boiler cannot become
damaged by frost.
50
1
2
5.13 Switching off the boiler
> Press the on/off switch (1) to switch the boiler off.
If the boiler is switched off, the display (2) turns off.
i
If the boiler is going to be unused for longer
periods (e.g. holiday), you should also close the
gas isolator cock and the cold water stop valve,
but only if there is no risk of frost.
5.8
Protecting the heating system against frost
5.8.1
Activating the frost protection function
Your Vaillant ecoTEC plus boiler is fitted with a frost protec-
tion function:
If the heating flow temperature falls below 5 °C when the
on/off switch is on, the boiler comes into operation and
heats the heat generation circuit to approx. 30 °C on both
the heating side and the hot water side (if available).
b
Caution!
Risk of damage caused by frost.
The frost protection function cannot guar-
antee flow through the entire heating sys-
tem, which means that parts of the heating
system may freeze and become damaged.
> Make sure that the boiler remains on
whilst you are away.
> Make sure that the rooms are heated suf-
ficiently.
5.8.2
Draining the heating system
Another way to protect the heating system and the boiler
from frost when they are switched off for a very long time
is to drain them. You must ensure that the heating system
and boiler are completely drained.
All the cold and hot water pipes in the house and in the
boiler must also be drained.
> Ask your heating engineer to drain the heating system.