Technical data

179
Coding – Vitocontrol-S, VD2/CT3/CM2
Coding 2 (continued)
Coding in factory setting Possible change
Systems/mixing valve circuit (continued)
b7: 0
*1
With remote control unit and for heating circuit,
operation with room temperature feed-back must
be programmed:
Without start-up optimization
b7: 1 With start-up optimization:
Max. offset
2 hours 30 minutes
b7: 2 Max. off-set
15 hours 50 minutes
b8:10
*1
With remote control unit and for heating circuit,
operation with room temperature feed-back must
be programmed:
Heat-up gradient – start-up optimization
10 minutes/ ˚C
b8: 11
to
b8:255
Heat-up gradient adjustable from 11 to
255 minutes / ˚C
b9: 0
*1
With remote control unit and for heating circuit,
operation with room temperature feed-back must
be programmed:
Without learning start-up optimization
b9: 1 With learning start-up optimization
C0: 0
*1
With remote control:
Without shut-down optimization
C0: 1 With shutdown optimization:
Max. off-set 1 hour
C0: 2 Max. off-set 2 hours
C1: 0
*1
With remote control:
Without shut-down optimization
C1: 1
to
C1: 12
With shutdown optimization:
Max. off-set from 10 to 120 minutes;
1 setting step = 10 minutes
C2: 0
*1
With remote control:
Without learning shutdown optimization
C2: 1 With learning shutdown optimization
Mixing valve circuit
C3:125 Mixing valve operating time:
125 seconds
C3: 10
to
C3:255
Operating time adjustable from 10 to 255 seconds
Mixing valve circuit
C4: 1 System dynamics – mixing valve control
characteristics
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
maintained correctly):
Select a lower value.
System circuit/mixing valve circuit
C5: 20 Electronic minimum supply temperature limit:
20˚C / 68˚F
C5: 1
to
C5:127
Minimum limit adjustable from 1 to 127˚C / 34 to
261˚F; only effective with room heating with
normal temperature
C6: 75 Electronic maximum supply temperature limit:
75˚C / 167˚F
C6: 10
to
C6:127
Maximum temperature limit adjustable from 10 to
127˚C / 50 to 261˚F
*1
Change coding – for system circuit A1 only for boilers without lower temperature limit – for mixing valve circuit only, if remote control
unit affects this heating circuit.
5351 340 v1.4