Vaillant ecoVIT exclusiv VKK 226/4-H Operating Instructions Manual page 6

3 Product description
3 Control (accessory)
4 Main switch
5 + button
− button
6
The display shows the current heating flow temperature, the
filling pressure of the heating installation, the operating mode
or certain additional information.
The i button is used to call up status information.
The control, which is available as an accessory, automatic-
ally controls the flow temperature depending on the outdoor
temperature.
The main switch is used to switch the product on and off.
The + button is used to display the cylinder temperature (if
the product is equipped with a cylinder temperature sensor).
The − button is used to display the filling pressure of the
heating installation.
The Reset button is used to reset the product in the case of
certain faults.
The heating flow temperature rotary knob is used to set the
heating flow temperature if no control is connected. If a con-
trol is connected, the heating flow temperature rotary knob
should be turned clockwise as far as it will go.
The cylinder temperature rotary knob is used to set the cyl-
inder temperature if a domestic hot water cylinder is connec-
ted.
If a control is connected, the rotary knob should be turned
clockwise as far as it will go. The control then determines the
cylinder temperature.
3.3.1 Digital Information and Analysis System
(DIA)
1
1 Display showing the
current heating flow
temperature, the filling
pressure in the heating
installation, or a status
or fault code
3.3.2 Displayed symbols
Symbol Meaning
Fault in the air/flue gas
route
Fault in the air/flue gas
route
6
7 Reset button
8 Heating flow temperat-
ure rotary knob
9 Cylinder temperature
rotary knob
2
2 Plain text display
Explanation
Symbol Meaning
comDIALOG
Heating mode
Hot water generation
Heating pump operating
Solenoid valve is actu-
ated
Current energy demand
Fault during burner
operation
Burner operating cor-
rectly
Operating instructions ecoVIT exclusiv 0020258609_00
Explanation
The heating flow and do-
mestic hot water temper-
ature are specified via
the comDIALOG com-
munications system. The
product works at temper-
atures other than those
set at the rotary knob.
This operating mode can
only be terminated by:
–
comDIALOG
–
Changing the tem-
perature at the rotary
knobs by more than
± 5 K
This operating mode
cannot be terminated by:
–
Pressing the Reset
button.
–
Switching the
product off and on
again
–
Symbol perman-
ently on: Product is
in heating mode op-
erating mode
–
Symbol flashing:
Burner anti-cycling
time is active
–
Symbol permanently
visible: Charging
mode for the do-
mestic hot water
cylinder is enabled
by the control and
floor-standing boiler
control system
–
Symbol flashes:
Domestic hot water
cylinder is being
heated
Gas supply to the burner
is open
Display of the current
burner modulation rate
(bar graph display)
Burner is switched off
Burner is switched on