Control Unit Controls And Display Elements; Heat-Up Preparations - Viessmann VITOLIGNO 300-C Operating Instructions Manual

Boiler

Control Unit Controls and Display Elements

Heat-up Preparations

Legend
A Pressure relief valve (PRV)
B Temperature and pressure gauge
C Air vent
D Low water cutoff
12
The programming unit
You can adjust all control unit settings centrally at the
programming unit.
 Takes you to the previous step in the menu or
cancels a setting that has been started.
Cursor keys
Scrolls through the menu or adjusts values.
d To confirm your selection or save the setting
you've made.
? Calls up the help text relevant to the selected
menu point.
Calls up the extended menu.
For operating the control unit, see from page 14.
Ask your heating contractor about the following:
H Boiler type and relevant control unit type
H Required system pressure
H Location of the pressure gauge, shut-off valve, gas
shut-off valve, ventilation apertures
1. Check the pressure of the heating system at pressure
gauge B:
The system pressure is too low if the indicator points
below the minimum operating pressure. In this case,
top up with water or notify your heating contractor.
Minimum system pressure: 14.5 psi (1.0 bar).
2. Check that the vents in the installation room are
unrestricted.
Note: With room air dependant operation, the
combustion air is drawn from the installation
room.
3. Verify that the heating system or the heating water
buffer tank is drawing off heat. Open the thermostatic
valves on the radiators if necessary.
4. Ensure that all heating supply and heating return
shut-off gate valves are open.
5. Check that all covers on the boiler are closed.
6. Ensure that power is supplied to the boiler.
Vitoligno 300-C Operating