Operating manual ecoTEC 0020052777_00
16
4.8 Decommissioning
1
Fig. 4.15 Switching off the appliance
• To shut down your gas wall-mounted boiler, turn the
main switch (
1
) to the position "
0
".
a
Caution!
The frost protection and monitoring systems
are only active if the main switch of the unit is
in the "I" position and the unit is connected to
the power mains.
To ensure that these protection devices remain active,
switch your gas wall-mounted boiler on and off in nor-
mal mode using the controller (see the corresponding
operating manual).
h
Note!
For longer periods of shut-down (e.g. holiday
periods), the gas stop-cock and the cold water
stop-cock should be switched off.
For relevant information on frost protection
refer to Chapter 4.9.
h
Note!
The isolator devices are not included in the
scope of delivery for your unit. They are fitted
by your heating engineer on site. He must ex-
plain to you the position and handling of these
components.
4.9 Frost
protection
The heating system and water pipes are sufficiently pro-
tected against frost if the heating system remains on
and the rooms are sufficiently heated while you are
away.
a
Caution!
The frost protection and monitoring systems
are only active if the main switch of the unit is
in the "I" position and the unit is connected to
the power mains.
a
Caution!
Addition of frost preventative medium to the
heating water is not permitted. This could af-
fect seals and diaphragms and cause noise
when the system is in heating mode. Vaillant
assumes no liability for this and such conse-
quential damages.
4.9.1 Frost
prevention
system
The gas wall-mounted boiler is equipped with a frost
protection system:
If the heating feed temperature falls below 5°C
when
the main switch is on
, the unit comes into operation
and heats the heat generation circuit to approx. 30°C.
a
Caution!
Danger of freezing of parts installed within the
overall system!
The frost protection system can not guarantee
flow through the entire heating system.
4.9.2 Frost protection through draining
Another way to protect the heating system and the ap-
pliance from frost is to drain them. You must ensure
that the system and the appliance are completely
drained.
All cold and hot water conductors in the house and in
the appliance must be drained too.
Contact your heating engineer.
4 Operation
