Viessmann Vitotronic 300 Installation And Service Instructions Manual page 60

Code 1
"Heating Circuit 1", "Heating Circuit 2", "Heating Circuit 3" Group
Coding in the delivered condition
Extended economy function mixing valve
A7:0 Only for heating circuits with mixing valve:
Without mixing valve economy function.
Pump idle time, transition reduced operation
A9:7 With pump idle time (heating circuit pump
"OFF"), (see function description on page 51).
Note: The max. idle period is 10 h.
Weather-compensated/room temperature hook-up
B0:0 With remote control:*2
Heating mode/reduced
mode: weather-compensated.
Economy function room temperature
B5:0 With remote control:*2
No room temperature-dependent heating
circuit pump logic function.
Parameter address
B5:...
1
2
3
4
5
6
7
8
Coding in the delivered condition
Min. supply temperature heating circuit
C5:20 Electronic minimum supply temperature limit
68°F (20°C) (only in operation with standard
room temperature).
Max. supply temperature heating circuit
C6:75 Electronic maximum supply temperature limit
set to 167°F (75°C).
*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.
60
With heating circuit pump logic function:
Heating circuit pump "OFF"
RTactual > RTset + 5 K
RTactual > RTset + 4 K
RTactual > RTset + 3 K
RTactual > RTset + 2 K
RTactual > RTset + 1 K
RTactual > RTset
RTactual > RTset – 1 K
RTactual > RTset – 2 K
Vitotronic 300, GW5B Installation and Service
Possible change
A7:1 With mixing valve economy function
(extended heating circuit pump logic):
Heating circuit pump also "OFF":
If the mixing valve has been closed for longer
than 20 min. Heating circuit pump "ON":
If the mixing valve changes to control function.
If there is a risk of frost.
A9:0 Without pump idle time.
A9:1 With pump idle time, adjustable from 1 to 15.
to 1 = short idle period
A9:15 15 = long idle time
B0:1 Heating mode: weather-compensated Reduced
mode: with room temperature hook-up
B0:2 Heating mode: with room temperature hook-up
Reduced mode: weather-compensated
B0:3 Heating mode/reduced mode: with room
temperature hook-up
B5:1 Heating circuit pump logic function, see the
to following table.
B5:8
Heating circuit pump "ON"
RTactual < RTset + 4 K
RTactual < RTset + 3 K
RTactual < RTset + 2 K
RTactual < RTset + 1 K
RTactual < RTset
RTactual < RTset – 1 K
RTactual < RTset – 2 K
RTactual < RTset – 3 K
Possible change
C5:1 Minimum limit adjustable from 34 to 261°F
to (1 to 127°C) (limited by boiler-specific
C5:127 parameters).
C6:10 Maximum limit adjustable from 50 to 261°F
to (10 to 127°C) (limited by boiler-specific
C6:127 parameters).
(continued)