Viessmann Vitotronic 100 GC1 Series Operating Instructions And User's Information Manual page 7

Starting up the heating system
The initial start-up and matching of the control unit to local conditions and
the structural characteristics of the building must be carried out by your
heating contractor.
In a multi-boiler system, only the Vitotronic 100 and the
Multi-
corresponding boiler are started up when the following steps are
boiler
system carried out.
1. Check the pressure of the heating
system on the manometer.
If the needle is below the red
marker, the system pressure is too
low – in which case add more water
or contact your heating contractor.
2. Open the shut-off valves in the oil
pipes (at the boiler) or open the gas
shut-off valve, whichever applicable.
3. Switch on the power supply voltage,
e.g. at the separate fuse or a power
supply disconnect switch.
4. Switch on the heating system on/off
switch "8"; the operating status is
indicated by the green lamp and,
after a short time, the boiler
temperature appears in the display
window.
Switching on and off
The boiler is now ready for operation.
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