Viessmann Vitoligno 250-S Installation And Service Instructions For Contractors page 37

Heating group
Select the heating circuit ("HC1", "HC2" or "HC3")
with keys / . Adjust the parameters separately for
Ù Ú
each heating circuit.
Coding
Coding in the delivered condition
Remote control
A0:0 Note
Only available if a remote control
■
unit is connected. The code is
automatically set by the boiler
control unit.
Without remote control, the pa-
■
rameter "0" is set. The code is
not displayed.
Summer eco function, room temperature
A5:5 With heating circuit pump logic
function (economy control): Heat-
ing circuit pump "Off" when outside
temperature (OT) is 1 K higher
than the set room temperature
(RT
set
Value address With heating circuit pump logic function: Heating circuit pump "Off"
A5: ...
1 OT
>
2 OT
>
3 OT
>
4 OT
>
5 OT
>
6 OT
>
7 OT
>
to
to
15 OT
>
Coding in the delivered condition
Summer eco function absolute
A6:36 Extended economy mode disa-
bled
)
RT + 5 K
set
RT + 4 K
set
RT + 3 K
set
RT + 2 K
set
RT + 1 K
set
RT
set
RT – 1 K
set
RT – 9 K
set
Possible change
A0:1 Vitotrol 200A connected
A0:2 Vitotrol 300A connected
A0:3 Vitotrol 350 connected
A5:0 Without heating circuit pump logic
function
A5:1 With heating circuit pump logic func-
to tion (see the following table)
A5:15
Possible change
A6:5 Extended economy mode active, i.e.
to the heating circuit pump is switched
A6:35 off at a variably adjustable value be-
tween 5 and 35 °C plus 1 °C. The
mixer is closed. The basis for this is
the adjusted outside temperature.
The adjusted outside temperature is
based on the actual outside temper-
ature and a time constant, which
takes into account the cooling down
of an average building.
Recommended setting: "A6:16" to
"A6:18"
Code 1
37