Protecting The Heating System Against Frost; Activating The Frost Protection Function; Draining The Heating System - Vaillant ecoTEC plus Operating Instructions Manual

4.9

Protecting the heating system against frost

b
Caution!
Material damage caused by frost!
Frost protection 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.
b
Caution!
Tap water that is extremely calciferous
or corrosive or contaminated by chemicals
can cause damage to the boiler!
Unsuitable tap water damages the seals and
diaphragms, blocks components in the boiler
and heating system through which the water
flows and causes noise.
> Only fill the heating system with suitable
tap water.
> In case of doubt, consult your approved
heating engineer.
The heating system and water pipes are sufficiently
protected against frost if the heating system remains
on and the rooms are sufficiently heated while you are
away.
4.9.1

Activating the frost protection function

Your Vaillant ecoTEC plus boiler is fitted with a frost
protection function:
If the heating flow temperature falls below 5 °C when
the main switch is on, the boiler comes into operation
and heats the heat generation circuit to approx. 30 °C.
b
Caution!
Material damage caused by frost!
The frost protection function cannot
guarantee flow through the entire heating
system, 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
sufficiently.
Operating instructions ecoTEC plus 0020124810_FT1b
4.9.2

Draining the heating system

Another way to protect the heating system and the
boiler from frost 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.
Operation 4
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