Settings Operating Modes; Heating Mode; Dhw Heating - Combi Boiler; Heating - Viessmann VITODENS 100-W Manual

Settings
Operating modes
Your Vitodens can be operated in the following modes: Heating or DHW .

Heating mode

If a Vitotrol 100 room temperature
controller, or a similar programmable
room thermostat, is connected, it is
used to set the required room tempe-
rature.
Please refer to the separate operating
instructions.

DHW heating - combi boiler

In the event of a demand for hot
water, the appliance will detect water
flow and initiate the ignition
sequence. The fan (and pump) will
start and the boiler will light.
If the hot water demand is near to the
maximum design flow rate the boiler
will run continuously at full output until
the tap is closed or the flow rate is
reduced, the heat input will be redu-
ced to maintain a steady pre-set tem-
perature at the tap.

Heating

10
If the setting on the room temperature
control unit is inadequate for achie-
ving the required room temperature
(e.g. during an extremely cold winter),
the heating water temperature can
also be modified using the rotary
selector tr .
Hot water is available almost instanta-
neously from the boiler, but the final
outlet temperature and the delay in
reaching full temperature will depend
on the flow rate and the distance from
the boiler to the tap.
When the tap is closed the boiler will
return to heating mode, if there is a
demand for heating, otherwise the
boiler will shut down until the next
demand for heating or hot water.
Switching ON:
Turn rotary selector tr to the
required heating water temperature.
If central heating is active the indica-
tor r appears on the display.
Switching OFF:
Turn rotary selector rt to 9 .