Start-Up And Shutdown; Heating System Start-Up; Heating System Shutdown - Viessmann VITODENS series Operating Instructions Manual

Start-up and shutdown

Heating system start-up

Position of the gas shut-off valve for
Vitodens 333

Heating system shutdown

If you temporarily have no need of your heating system, e.g. during a summer
holiday, switch the system to "standby mode" K (see page 12).
Note
The circulation pump will be started for short periods at regular intervals to pre-
vent it from seizing up. These intervals can be modified by your heating contrac-
tor.
10
1. Check the heating system pressure
on the pressure gauge A: The sys-
tem pressure is too low if the nee-
dle indicates below 0.8 bar. In that
case, top up with water or contact
your local heating contractor.
2. For open flue operation:
The combustion air is drawn from
the boiler room.
Check whether the ventilation/
exhaust apertures in the boiler
room are open and unobstructed.
3. Open the gas shut-off valve B.
4. Switch ON the mains power supply;
e.g. at a separate fuse or a mains
electrical isolator.
5. ON/OFF switch "8" C;
standby mode is then shown to be
running by the green indicator (ON
indicator); after a short time the boi-
ler temperature will be displayed.
Your heating system and, if
installed, your remote control unit
are now ready for use.