Starting The Heating System; Shutting Down The Heating System; With Frost Protection Monitoring; Without Frost Protection (Shutdown) - Viessmann VITODENS 111-W Operating Instructions Manual

Start-up/shutdown

Starting the heating system

We recommend you contact your local heating con-
tractor if you are planning to start up a heating system
that has not been used for a long period.
2
1
0
bar
Fig. 4
Fig. 5

Shutting down the heating system

With frost protection monitoring

Further information can be found in chapter
"Terminology" in the appendix.
If you do not wish to use your boiler for several days
you can switch the appliance off.
Set the boiler water temperature and the DHW temper-
ature to OFF.

Without frost protection (shutdown)

Shut down your heating system completely if it will not
be needed for longer periods (several months).
We recommend you contact your local heating con-
tractor if you are planning to take your heating system
out of use for long periods. Your heating contractor can
then take suitable steps such as frost protection for the
system or heating surface preservation as required.
10
3
4
1. Check the pressure of your heating system on the
pressure gauge.
Minimum system pressure 0.8 bar
Notify your heating contractor if the system pres-
sure is too low.
2. In open flue operation:
Combustion air is drawn from the installation room.
Check whether the vents in the installation room
are open and unobstructed.
3. Open the gas shut-off valve.
4. Turn ON the ON/OFF switch.
Your heating system and room temperature control-
ler (if connected) are now ready for operation.
Frost protection monitoring is now active for the boiler
and the DHW cylinder.
Note
Frost protection for the entire heating system – see
operating instructions for the room temperature con-
troller.
1. Close the gas shut-off valve and safeguard against
unauthorised reopening.
2. Turn OFF the ON/OFF switch.
The power to the system is now at zero volt.
Note that the system is no longer protected
against frost.