Connecting The Analog Input 0-10V; Connecting The Km Bus To The Boiler Control Unit - Viessmann EA1 Installation Instructions And Operators Manual

Connections

Connecting the Analog Input 0-10V

Connecting the KM BUS to the Boiler Control Unit

Legend
A Extension EA1
B Connection area of boiler control unit
10
EA1 Extension Module Installation
The 0 - 10V hook-up provides an additional set boiler
water temperature:
0 - 1V seen as "no default set boiler water temperature"
1V set value 50°F (10°C)
10V set value 212°F (100°C)
On the Vitotronic, type G ... the range of the set value
default can be changed with code 1E:
1V set value 86°F (30°C)
10V set value 248°F (120°C)
Boiler control unit installation
and service instructions