Viessmann EA1 User Manual

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EA1 Extension Module Installation
Connecting Digital Inputs
The following functions can be connected alternatively:
H External heating program changeover for each heating
circuit
H External blocking
H External blocking with central fault message
H External demand with set flow temperature
H Central fault message
H Brief operation of the DHW circulation pump
The hooked-up contacts must correspond to protection
class II.
Coding
address
Control unit
Vitotronic, type H... Vitotronic, type G...
Input DE1 3A 5d
Input DE2 3b 5E
Input DE3 3C 5F
Function assignment of inputs DE1 to DE3
Select the input functions by means of the codes on the
boiler control unit.
Complete description of the coding addresses:
Subject to function and digital input selected for the
respective function, the following codes need to be
changed at the boiler control unit:
Function Setting
Code 3A, 3b, 3C
(Vitotronic, type H ... )
Code 5d, 5E, 5F
(Vitotronic, type G ...)
No function 0
Heating program
changeover
1
External demand with set
flow temperature
2
External blocking 3
External blocking with fault
message input
4
Fault message input 5
Brief operation, DHW
circulation pump
6
Service instructions for boiler
or control unit
Connections

Viessmann EA1 Specifications

General

Brand	Viessmann
Model	EA1
Category	Control Unit
Language	English