Starting Dhw Heating Only; Shutting Down A Heating Circuit And Stopping Dhw Heating; Switching The Comfort Function On And Off - Viessmann VITODENS Operating Instructions Manual

Start-up/shutdown

Starting DHW heating only

You do not want to heat your rooms but would like to have DHW available.
Press L.
DHW only:
No central heating.
DHW will be heated (subject to a
DHW cylinder or instantaneous
water heater being installed).
Frost protection for the boiler and
the DHW cylinder is enabled.

Shutting down a heating circuit and stopping DHW heating

You do not want to heat your rooms or have DHW available.
Press K.
Standby mode:
No central heating.
No DHW heating.
Frost protection for the boiler and
the DHW cylinder is enabled.

Switching the comfort function ON and OFF

Only for Vitodens 200-W or Vitopend 200 (type WHKA) with integral instanta-
neous water heater.
If the comfort function is switched ON, the instantaneous water heater is kept up
to temperature (standby). This makes hot water available immediate.
You can switch OFF the comfort func-
tion with "/". This prevents the boiler
being switched ON, saving energy in
connection with maintaining the
standby temperature when no hot
water is being drawn (e.g. at night).
12
The circulation pump is briefly started
in certain intervals to prevent it from
seizing up. Your heating contractor
can alter these intervals.