Starting Dhw Heating Only - Viessmann VITODENS Operating Instructions Manual

Shutting down a heating circuit and stopping DHW . . .
If "Select htg.circuit" is displayed
and "1 r" flashes:
Select that heating circuit with a/
&
b, to which the adjustment should
apply.
Confirm twice with d.
&
Press K again for "Standby
&
mode".
Standby mode:
& Central heating is disabled for the
selected heating circuit.
& No DHW heating.
& Frost protection for the boiler and
the DHW cylinder is enabled.

Starting DHW heating only

You do not want to heat your rooms but have DHW available.
Press key L for "DHW only".
If "Select htg.circuit" is displayed
and "1 r" flashes:
Select that heating circuit with a/
&
b, to which the adjustment should
apply.
Confirm twice with d.
&
Press key L again for "DHW only".
& Central heating is disabled for the
selected heating circuit.
Start-up/shutdown
Note
The circulation pump is briefly started
every 24 hours to prevent it from seiz-
ing up.
& DHW heating (if a DHW cylinder or
instantaneous water heater is
installed) and DHW circulation
pump (if connected to the control
unit) ON according to the set time
program. Standard setting: from
05:30 to 22:00 h, DHW is heated to
the selected set temperature and
the DHW circulation pump is
switched ON.
(cont.)
15