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Vitodens 100-W, B1HA/B1KA 26 to 125 Combi Operating
Operating Mode of the Heating System
Starting the Heating System
Legend
A Pressure gage
B LCD display unit
C power switch ON/OFF
Operation without room temperature thermostat
Setting the required heating water temperature, see
page 10.
Operation with room temperature thermostat
Make any settings on the connected room temperature
controller using the relevant operating instructions.
Note: Set the boiler water temperature high enough to
achieve the required room temperature.
For boiler water temperature setting, see page 11
Weather-compensated operation without room
temperature thermostat
In weather-compensated mode, the boiler water
temperature is regulated subject to the outside
temperature.
For setting the room temperature, see page 11.
Weather-compensated operation with room temperature
thermostat
In weather-compensated mode, the boiler water
temperature is regulated subject to the outside
temperature.
Note: Connect a room thermostat to your heating system
to prevent heat being generated unnecessarily at
times when you do not require central heating.
This enables central heating to be suspended at
night, for example, in order to save energy.
For setting the room temperature, see page 11.
1. Check the pressure of your heating system on the
pressure gauge.
Minimum system pressure 12 psi (0.8 bar)
Notify your heating contractor if the system pressure
is too low.
2. In room air dependent operation:
Combustion air is drawn from the boiler room.
Check whether the vents in the boiler room are open
and unobstructed.
- Open the gas shut-off valve.
- Turn ON the ON/OFF switch.
Your heating system and room temperature thermostat
(if connected) are now ready for operation.
Operation
9
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