Viessmann VITOTRONIC 300 Installation And Service Instructions Manual page 99

Vitotronic 300, GW5B & MW1B Installation and Service
"Heating Circuit 1", "Heating Circuit 2", "Heating Circuit 3" Group
Coding in the factory set condition
A6:36 Extended economy control disabled.
A7:0 Only for heating circuits with mixing valve:
Without mixing valve economy function.
A9:7 With pump idle time
(heating circuit pump "OFF")
(See function description on page 51).
AA:2 With output reduction by temperature sensor
aJA.
B0:0 With remote control:
Heating mode/reduced mode: weather-
compensated.
B2:8 With remote control and for the heating
circuit, operation with room temperature hook-
up must be programmed:
Room influence factor 8.
B5:0 With remote control:
No room temperature dependent heating
circuit pump logic function.
*2 Only change the code for the system circuit A1 for boilers without lower temperature limit or for the heating circuits
with mixing valve if a remote control is connected to them.
Parameter address B5:...
1
2
3
4
5
6
7
8
*2
*2
*2
With heating circuit pump logic function:
Heating circuit pump "OFF"
1 RT > RT
actual set
2 RT > RT
actual set
3 RT > RT
actual set
4 RT > RT
actual set
5 RT > RT
actual set
6 RT > RT
actual set
7 RT > RT
actual set
8 RT > RT
actual set
Possible change
A6:5 Extended economy control enabled, i.e.
to the burner and heating circuit pump will be
A6:35 stopped and the mixing valve closed at a
variable value, adjustable between 41 to 95° F
(5 and 35° C) plus 34° F (1° C).
The base value is the adjusted outside
temperature.
This value is based on the actual outside
temperature and a time constant, which takes
the cooling down of an average building into
consideration.
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 12 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 period
AA:0 Without output reduction.
AA:1 No function.
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
B2:0 Without room influence.
B2:1 Room influence factor adjustable from 1 to
to 64.
B2:64
B5:1 Heating circuit pump logic function, see the
to following table.
B5:8
Heating circuit pump "ON"
+ 5 K RT
actual
+ 4 K RT
actual
+ 3 K RT
actual
+ 2 K RT
actual
+ 1 K RT
actual
RT
actual
- 1 K RT
- 2 K RT
Code 2, Vitotronic 300-K
(continued)
< RT + 4 K
set
< RT + 3 K
set
< RT + 2 K
set
< RT + 1 K
set
< RT
set
< RT - 1 K
set
< RT - 2 K
actual set
< RT - 3 K
actual set
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