Viessmann Vitotronic 200 KW2 Installation And Service Instructions Manual page 97

Code 2
(cont.)
Coding in the delivered condition
Boiler circuit/mixer circuit (cont.)
*1
C2 : 0 With remote control:
Without learning shutdown
time optimisation
Mixer circuit
C4 : 1 System dynamics
control characteristics
Boiler circuit/mixer circuit
C5 : 20 Electronic minimum flow
temperature limit 20 ºC
Mixer circuit
C6 : 75 Electronic maximum flow
temperature limit 75 ºC
C7 : 0 With return temperature
sensor:
Without return temperature
sensor influence
*1
Change the code for the heating circuit without mixer A1 for boilers without lower
temperature limit or for mixer circuit M2, if the remote control unit affects that
heating circuit.
Possible change
C2 : 1
mixer C4 : 0
to
C4 : 3
C5 : 1
to
C5 : 127
C6 : 1
to
C6 : 127
C7 : 1
to
C7 : 31
With learning shutdown
time optimisation
Controller responds too
quickly (cycles between
open and close):
Select a lower value.
Controller acts too slowly
(temperature is not held
sufficiently):
Select a higher value.
Minimum limit adjustable
from 1 to 127 ºC (only for
operation with standard
room temperature)
Maximum limit adjustable
from 1 to 127 ºC
Spread adjustable
from 1 to 31 K
Spread = temperature
differential between the
flow and return
temperature at the design
point 10 ºC
Coding
97