Viessmann Vitotronic 300 Installation And Service Instructions Manual page 77

Vitotronic 300, GW5B Installation and Service
"Heating circuit 1", "Heating circuit 2", "Heating circuit 3" Group
Coding in the delivered condition
B9:0 With remote control unit and for the
heating circuit, operation with room
temperature hook-up must be
programmed:*2
Without learning start optimization.
C0:0 With remote control:*2
Without stop optimization.
C1:0 With remote control:*2
Without stop optimization.
C2:0 With remote control:*2
Without learning stop optimization.
C3:125 Only for heating circuits with mixing valve:
Mixing valve runtime 125 sec.
C4:1 System dynamics:
Mixing valve control characteristics
C5:20 Electronic minimum supply temperature
limit 68°F (20°C) (only in operation with
standard room temperature).
C6:75 Electronic maximum supply temperature
limit set to 168°F (75°C).
C8:31 With remote control unit and for the heating
circuit, operation with room temperature
hook-up must be programmed:*2
No room influence limit.
D5:0 With external heating program changeover
(observe setting of coding address "5D",
"5E", "5F" and "91" in the "General" group):
Heating program switches to "Constant
central heating with reduced room
temperature" or "Standby mode" (subject
to the settings of the set reduced room
temperature).
D8:0 With extension EA1:
No heating program changeover.
*2 Only change the code for the heating circuit without mixing valve A1 for boilers without lower temperature limit
or for the heating circuits with mixing valve if a remote control is connected to them.
Possible change
B9:1 With learning start optimization.
C0:1 With stop optimization, max. setback time delay 1 h.
C0:2 With stop optimization, max. setback time delay 2 h.
C1:1 With stop optimization of setback time delay,
to adjustable from 10 to 120 min;
C1:12 1 step ≙ 10 min
C2:1 With learning stop optimization.
C3:10 Runtime adjustable from 10 to 255 sec.
to
C3:255
C4:0 Controller responds too quickly (cycles between
to "Open" and "Close"): Select a lower value.
C4:3 Controller responds too slowly (temperature is not
held sufficiently): select a higher value.
C5:1 Minimum limit adjustable from 34 to 261°F
to (1 to 127°C) (limited by boiler-specific parameters).
C5:127
Maximum limit adjustable from 50 to 261°F
(10 to 127°C) (limited by boiler-specific
parameters).
C8:1 Room influence limit adjustable from 1 to 30 K.
to
C8:30
D5:1 The heating program changes to "Constant
operation with standard room temperature".
D8:1 Heating program changeover via input DE1.
D8:2 Heating program changeover via input DE2.
D8:3 Heating program changeover via input DE3.
Code 2
(continued)
77