Viessmann VITOTRONIC 050 - Page 47

47
Coding
Coding 2 (cont.)
Coding in the factory default setting Possible change
General (cont.)
C4 : 1 Standard mixing valve algorithm C4 : 0
to
C4 : 3
Controller responds too quickly (cycles between
open and close): select a higher value.
Controller acts too slowly (temperature is not
held sufficiently): select a lower value.
C5 : 20 Electronic minimum supply temperature limit
20°C / 68°F (only during operation with
normal room temperature)
C5 : 1
to
C5 : 127
Minimum limit adjustable from
1 to127°C / 34 to 261°F
C6 : 75 Electronic maximum supply temperature
limit set to 75°C / 167°F
C6 : 10
to
C6 : 127
Maximum limit adjustable from
1 to 127 °C / 34 to 261°F
C7 : 0 With return temperature sensor:
Wthout influence on the return temperature
sensor
C7 : 1
to
C7 : 31
Spread adjustable from 1 to 31°C / 2 to 57°F
Spread = temperature differential between the
supply and return temperature at the design
point -10°C / 50°F
C8 : 31 With remote control unit and for the heating
circuit with room temperature connections
must be encoded:
Without limiting room influence
C8 : 1
to
C8 : 30
Room influence limit adjustable from
1 to 30°C / 2 to 54°F
C9 : 0 Control of an underfloor heating system by
flow and return temperature sensor:
Without heat-up phase
C9 : 1
With optimization during the heat-up phase
(operates with coding address C7)
CA : 0 Rotational direction - mixing valve actuator CA : 1 Rotational direction reversed
d5 : 0 The heating program changes to ”Continu-
ous operation” with reduced room tempera-
ture
d5 : 1 The heating program switches over to
”Continuous space heating” with normal
room temperature
E1 : 1 Set day value is adjustable at the control
unit and the remote control from 10 to
3
0
°
C
/
5
0
t
o
8
6
°
F
E1 : 0
Set day value adjustable from
3 to 23°C / 37 to 73°F
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1
0
t
o
30°C / 50 to 86°F
E1 : 2
Set day value adjustable from
17 to 37°C / 63 to 99°F
E2 : 50 With remote control:
No display correction of the actual room
temperature
E2 : 0
to
E2 : 49
Display correction -5°C / 9°F
to
Display correction -0.1°C / -0.2°F
E2 : 51
to
E2 : 99
Display correction +0.1 °C /
+0.2 °F
to
Display correction +4.9 °C /
+8.8 °F
5285 967 v1.2