Viessmann VITOTRONIC300 Installation And Service Instructions Manual page 94

Code 1
"Heating Circuit 1", "Heating Circuit 2", "Heating Circuit 3" Group
Coding in the factory set 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 mode
A9:7 With pump idle time (heating circuit pump
"OFF").
(See function description on page 82).
Weather-compensated/room temperature hook-up
b0:0 With remote control:
Heating mode/reduced mode:
weather-compensated.
Economy function room temperature
b5:0 With remote control:
No room temperature dependent heating circuit
pump logic function.
*2 Only change the code for the heating circuit A1 for boilers without lower temperature limit or for the heating circuits
with mixing valve if a remote control is connected to them.
94
*2
*2
Vitotronic 300, GW2B 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 period
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
(continued)