Vaillant VRT 350, Operating Instructions Manual, Page: 25 / 36

Operating and display functions 5
0020135485_00 VRT 350 Operating instructions
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5.4 Special operating modes
The advanced functions can be activated directly from
any mode using the right-hand selector button «Operat-
ing mode».
The path details given at the start of each advanced func-
tion description indicate how you can access this advanced
function in the menu structure.
5.4.1 Cylinder boost
«Operating mode»
→
«Cylinder boost»
–
If you have switched off hot water generation or require
hot water outside a time period, activate the «Cylinder
boost »advanced function. The advanced function heats
the water in the domestic hot water cylinder once, un-
til the set desired «Hot water circuit» temperature is
reached or until you cancel the advanced function early.
The heating system will then return to the pre-set mode.
5.4.2 Party
«Operating mode»
→
«Party function»
–
If you want to switch on the heating circuit and hot wa-
ter generation temporarily, e.g. during a party, activate
the advanced function «Party».
This means you do not need to change the settings on the
heating system for short periods of time. The advanced
function brings the room temperature to the set desired
«Day» temperature, in accordance with the set time peri-
ods.
If the display shows «Party function active», you can use
the rotary knob to set the desired «Day» temperature for
the heating circuit.
The advanced function is deactivated when the next time
period is reached or if you cancel the advanced function
early. The heating system will then return to the pre-set
mode.
5.4.3 1 day away from home
«Operating mode»
→
«1 Day away from home»
–
If you are only away from home for one day, e.g. for a
day trip, activate the «1 Day away from home» advanced
function. This means you do not need to change the time
periods that you have set by increasing the room tem-
perature during the day, for example. This advanced
function brings the room temperature to the desired
«Set-back» temperature.
Hot water generation is switched off and frost protection is
activated.
If the display shows «1 Day away from home active», you
can use the rotary knob to set the desired «Set-back» tem-
perature for the heating circuit.
The advanced function is automatically deactivated after
24:00 hours or if you cancel the advanced function first.
The heating system will then return to the pre-set mode.
5.5 Messages
5.5.1 Service message
If a service is required, the controller displays a service
message in the display.
Caution!
Risk of damage to the heating installa-
tion due to failure to perform mainten-
ance work.
A service message indicates that the heat-
ing installation must be serviced by the
skilled tradesman. Failure to observe these
service messages could lead to material
damage or failure of the heating installa-
tion.
▶ If the controller displays a service mes-
sage, inform a skilled tradesman.
Service Heat Generator 1
Desired temperature 20,0°C
Menu Mode
°C
22,5
Image 5.4: Example of a service message
The following service messages may appear:
–
«Boiler service»
–
«Service» (of the heating installation)
5.5.2 Fault message
If a fault occurs in the heating system, the controller dis-
plays a fault message in the display.