Selecting A Time Program (Switching Times) - Viessmann VITODENS Operating Instructions Manual

Selecting DHW heating
Selecting constant DHW heating

Selecting a time program (switching times)

Note
The control unit is set up so that the setting for DHW heating applies to all heat-
ing circuits. If you want to make changes to the DHW heating settings for the
heating circuits, contact your local heating contractor.
Heating system without DHW circulation pump
DHW heating can be enabled/dis-
abled up to four times per day (four
time phases).
Automatic mode is set in the time
program at the factory. That means
DHW heating is enabled in parallel to
the central heating time program of
the first available heating circuit, but
starts 30 min earlier (from 5:30 to
22:00 h).
Heating system with DHW circulation pump
The DHW circulation pump transports
hot water through a circuit between
the DHW cylinder and the draw-off
points to deliver DHW to the taps as
quickly as possible.
DHW heating and the DHW circulation
pump can be enabled/disabled up to
four times per day (four time phases).
Automatic mode is set in the time
program at the factory. That means
DHW heating and the DHW circulation
pump are activated in parallel to the
central heating time program of the
first available heating circuit, but
they start 30 min earlier (from 5:30 to
22:00 h).
26
(cont.)
Should you not wish to operate in
automatic mode, you can also set up
individual time programs. You can
select identical time programs for
every day or individual programs for
each day.
When setting time programs, bear in
mind that your heating system
requires some time to heat the DHW
cylinder to the required temperature.
For time programming steps, see
page 27.
For a sequence of steps to delete a
time phase, see page 28.
Should you not wish to operate in
automatic mode, you can also set up
individual time programs. You can
select identical time programs for
every day or individual programs for
each day.
When setting time programs, bear in
mind that your heating system
requires some time to heat the DHW
cylinder to the required temperature.
Also, enabling the DHW circulation
pump is only sensible for those times
when DHW is actually drawn.
For time programming steps, see
page 27.
For a sequence of steps to delete a
time phase, see page 28.