One-Off Dhw Heating" Outside The Time Program; Switching On "One-Off Dhw Heating; Switching Off "One-Off Dhw Heating; Increased Dhw Hygiene - Viessmann VITOCAL 150-A Operating Instructions For The System User

Time program for DHW heating
2. "DHW"
3.
4. Select a day of the week.
5.

"One-off DHW heating" outside the time program

If you require hot water outside the set time phases,
switch on "Once-only DHW heating" .
The DHW cylinder is heated once to the set DHW tem-
perature.

Switching on "One-off DHW heating"

Tap the following buttons:
1. for the "DHW" default display or possibly
"Favourites"

Switching off "One-off DHW heating"

One-off DHW heating
temperature has been reached.
Tap the following on-screen buttons to terminate
"One-off DHW heating" early:
1. for the "DHW" default display or possibly
"Favourites"

Increased DHW hygiene

You can heat the water in the DHW cylinder to above
60 °C once a week or for an hour every day. This func-
tion is regularly carried out at the specified time.

Switching on increased DHW hygiene

Tap the following buttons:
1.
2. "DHW"
3. "Hygiene function"
(cont.)
ends as soon as the DHW set
6. Depending on the required change:
■ to change the time phase
for a new time phase
■
to delete a time phase.
■
■ to select the time phase if more than one
time phase is set.
For how to set a time program: See page 19.
This function has a higher priority than other functions,
such as the time program for example.
2.
3. to confirm
2.
Danger
High DHW temperatures can cause scalding,
e.g. if the DHW temperature is above 60 °C.
Mix with cold water at the draw-off points.
4. for the starting time "Start"
5. Select the required day of the week or daily.
The selection is highlighted.
6. to confirm
DHW heating
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