Viessmann VITOCROSSAL 300 Operating Instructions Manual page 28

DHW Heating
Time Program
28
(continued)
Vitocrossal 300 CA3 Series 2.5 to 6.0 Operating
Note:
DHW is not heated between the time phases. Frost

protection for the DHW tank is enabled.
When setting time programs, bear in mind that your

heating system requires some time to heat the DHW
tank to the required temperature.
Any DHW heating process that has started will continue

until the set DHW temperature is reached, even if the
stop time has been reached.
DHW 4th phase heating (auxillary function)
This function can be used to heat the water in the DHW
tank to a higher set DHW temperature. Your heating
contractor can enable this function by specifying a
second set DHW temperature.
Set time phase 4 for this. During this time, DHW will
be heated to the second set DHW temperature value.
Note: A start and stop time must be set for the 2nd and
3rd time phase.
DHW heating once, outside the time program
Note: The operating program "Heating and DHW" or
"DHW only" must be set for at least one system
heating circuit. Enable and then immediately disable
"Comfort mode" (see page 24). This avoids
unintentional central heating with the standard
room temperature.
Setting the time program for the DHW recirculation pump
Factory setting: "Automatic"
The DHW recirculation pump operates in parallel to the
DHW heating time program.
You can change this time program individually in
accordance with your requirements.
From the home screen tap the following buttons:
1. "Menu"
2. "DHW"
3. "Time program, DHW recirculation"
4. "Individual"
5. Press OK to confirm
For how to set a time program, see page 19.
Note: Between the time phases, the DHW recirculation
pump remains off.
Switching off DHW heating
From the home screen tap the following buttons:
1. "Menu"
2. "DHW"
3. "DHW temperature"
4. for 50°F (10°C)
5. Press OK to confirm