Viessmann PYROMAT ECO Technical Manual page 54

Application examples
Note
Pyromat Eco and oil/gas boilers must be connected to separate chimney stacks.
Match the heating curve of the oil/gas boiler to the heating curve of the heating circuit with the highest flow temperature. Depending on the
system scope and layout, we recommend that these are offset upwards in parallel.
8
ID: 4605385_1304_04
Service address KO1B/KO2B
Group
"General"
"General"
Service address Ecotronic
"Hardware"
"Hardware"
"Boiler"
Additional settings on the extension kits
"Extension kit 1"
"Extension kit 2"
"Extension kit 3"
54
(cont.)
Code Function
"3A:3" DE1 external blocking
"3b:2" DE2 external demand with set minimum boiler water temperature
"Number of HC : 2" 2 heating circuits installed
"Number of DHW : 1" 1 DHW group installed (DHW cylinder with circulation pump)
"0A:2" External additional heat source installed
"Rotary selector S1 : 1" Heating circuit 1
"Rotary selector S1 : 3" Heating circuit 2
"Rotary selector S1 : 5" Heating circuit for DHW heating
PYROMAT ECO