Operating instructions
Ready for operation
8
Overview of controls and indicators
(continued)
Vitocontrol-S, VD2/CT3/CM2
Adjustment of the display window
contrast
Open the hinged cover on the
programming unit, and press and,
at the same time, adjust the contrast
with the or button.
Factory settings
Press this button to reset all altered
values to their factory settings. Please
note that all altered values are reset to
the factory settings.
Flashing data
Data flashing in the display window
means that new settings can be
entered.
Basic display
The basic display of the Vitocontrol-S,
VD2/CT3/CM2 shows the boiler
sequence. The display reverts to
showing the boiler sequence after each
setting is made on the control unit.
Other display symbols
(These are not displayed
continuously, but appear according
to system type and operating status)
e Risk of freezing
s Central heating with normal
room temperature
m Central heating with reduced
room temperature
w Domestic hot water heating,
DHW pump ON
p Heating circuit pump ON
U
UU
U Fault message
V Mixing valve open
v Mixing valve closed
Select the heating ciruit - before every setting and scanning operation
On heating systems with only one heating circuit, you can start making all
settings immediately.
On heating systems with two or three heating circuits, the corresponding heating
circuit must be selected before carrying out each setting and scanning operation.
Heating circuit selector button : Heating circuit 1 (system circuit)
Heating circuit selector button : Heating circuit 2 with mixing valve
Heating circuit selector button
3
: Heating circuit 3 with mixing valve
The heating circuits are individually labelled by your heating contractor.
Press or or
3
; the following
buttons are illuminated:
the heating circuit selector button
the current heating program
(see page 8)
the party or energy saving mode, if
selected
You can now start making the settings
and adjustments for the selected
heating circuit.
If you have not selected the
required heating circuit before
starting to carry out the settings,
the following instruction appears in
the display window:
“First select button 1, 2 or 3.”
Please note:
If no further settings are made, the
illumination of the buttons is
extinguished after a short time.
5351 341 v1.2
Boiler sequence
1-23-4
Boiler temperature
Mo