Technical data

99
5693 973 - 05
Vitotronic 300, GW5B & MW1B Installation and Service
“Heating Circuit 1”, “Heating Circuit 2”, “Heating Circuit 3” Group (continued)
Coding 2, Vitotronic 300-K
Coding in the factory set condition Possible change
A6:36 Extended economy control disabled. A6:5
to
A6:35
Extended economy control enabled, i.e.
the burner and heating circuit pump will be
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.
A7:0 Only for heating circuits with mixing valve:
Without mixing valve economy function.
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.
A9:7 With pump idle time
(heating circuit pump “OFF”)
(See function description on page 51).
A9:0 Without pump idle time.
A9:1
to
A9:15
With pump idle time; adjustable from 1 to 15.
1: short idle period
15: long idle period
AA:2 With output reduction by temperature sensor
aJA.
AA:0 Without output reduction.
AA:1 No function.
B0:0 With remote control:
*2
Heating mode/reduced mode: weather-
compensated.
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
B2:8 With remote control and for the heating
circuit, operation with room temperature hook-
up must be programmed:
*2
Room influence factor 8.
B2:0 Without room influence.
B2:1
to
B2:64
Room influence factor adjustable from 1 to
64.
B5:0 With remote control:
*2
No room temperature dependent heating
circuit pump logic function.
B5:1
to
B5:8
Heating circuit pump logic function, see the
following table.
*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:... With heating circuit pump logic function:
Heating circuit pump “OFF” Heating circuit pump “ON”
1 1 RT
actual
> RT
set
+ 5 K RT
actual
< RT
set
+ 4 K
2 2 RT
actual
> RT
set
+ 4 K RT
actual
< RT
set
+ 3 K
3 3 RT
actual
> RT
set
+ 3 K RT
actual
< RT
set
+ 2 K
4 4 RT
actual
> RT
set
+ 2 K RT
actual
< RT
set
+ 1 K
5 5 RT
actual
> RT
set
+ 1 K RT
actual
< RT
set
6 6 RT
actual
> RT
set
RT
actual
< RT
set
- 1 K
7 7 RT
actual
> RT
set
- 1 K RT
actual
< RT
set
- 2 K
8 8 RT
actual
> RT
set
- 2 K RT
actual
< RT
set
- 3 K