Vaillant VRT 350, Operating Instructions Manual, Page: 22 / 36

5 Operating and display functions
22
Operating instructions VRT 350 0020135485_00
Set the time period for the heating circuit so that each time
period:
–
starts approx. 30 minutes before the time at which the
rooms should reach the desired «day temperature».
–
ends approx. 30 minutes before the time at which the
rooms should reach the desired «set-back temperature».
5.2.2.6 For hot water generation
«Menu»
→
«Timer programs»
→
«Hot water circuit»
–
You can only use the controller's functions and setting
options for hot water generation if a domestic hot water
cylinder is connected to the heating installation.
The timer programs are only effective for hot water gener-
ation in the «Automatic mode» and «Summer mode» oper-
ating modes.
In each set time period, the desired «Hot water circuit»
temperature that you set in the «Desired temperatures»
function applies. If, during the time period, the cylinder
temperature drops by 5 °C below the desired «Hot water
circuit» value, the domestic hot water cylinder is heated
back up to the desired «Hot water circuit» temperature
(recharged). At the end of a time period, the controller
switches the hot water generation off until the start of the
next time period.
Set the time periods for hot water generation so that each
time period:
–
Starts approx. 30 minutes before the time at which the
water in the domestic hot water cylinder should have
reached the desired «Hot water circuit» temperature.
–
Ends approx. 30 minutes before the time at which you no
longer need any hot water.
5.2.3 Days away from home scheduling
«Menu»
→
«Days away from home scheduling»
→
«HEAT-
ING 1»
–
With this function, you can set a period with a start and
end date and a temperature for days during which you
are away from home. Thus, you do not need to change
time periods for which you have set, for example, no
reduction of the desired temperature over the course
of the day.
Frost protection is activated.
While the «Days away from home scheduling» function is
activated, it has priority over the set operating mode. At
the end of the specified period, or if you cancel the func-
tion, the heating system returns to the pre-set mode.
5.2.4 Language selection
Note
During installation, the skilled tradesman sets
the desired language. All functions are dis-
played in the set language.
«Menu»
→
«Basic settings»
→
«Language»
–
If the language of e.g. a service technician differs from
the set language, you can change the language using this
function.
Caution!
It may not be possible to operate the
controller if the wrong language is se-
lected.
If you select a language that you do not
understand, you can no longer read the
text in the controller display and can no
longer operate the controller.
▶ Only select a language that you under-
stand.
However, if the text in the display should appear in a lan-
guage that you do not understand, you can set a different
language.
5.2.4.1 Set a language that you understand
1. Press the left-hand selection button repeatedly until the
basic display appears.
2. Press the left-hand selection button again.
3. Rotate the rotary knob clockwise until the dotted line
appears.
4. Then rotate the control knob anticlockwise until the
second list entry above the dotted line is highlighted.
5. Press the right-hand selection button twice.
6. Turn the control knob (to the right or left) until you find
a language you understand.
7. Press the right-hand selection button.
5.2.5 Setting the date
«Menu»
→
«Basic settings»
→
«Date/Time»
→
«Date»
–
Select this function to set the current date. All controller
functions that contain a date relate to the set date.
5.2.6 Setting the time
«Menu»
→
«Basic settings»
→
«Date/Time»
→
«Time»
–
Select this function to set the current time. All controller
functions that contain a time relate to the set time.