Ea1 Extension - Viessmann Vitodens 300-W Technical Manual

Control units
(cont.)
Specification
Rated voltage 230 V~
Rated frequency 50 Hz
Rated current 4 A
Power consumption 4 W
Rated relay output break- 2(1) A, 250 V~ each, total max. 4 A~
ing capacity
Safety category I
IP rating IP 20 D to EN 60529, ensure through
design/installation
Permissible ambient temperature
– Operation 0 to +40 °C
Installation in living spaces or boiler
rooms (standard ambient conditions)
– Storage and transport –20 to +65 °C

EA1 extension

Part no. 7452 091
Function extension inside enclosure for wall mounting.
Using the inputs and outputs allows up to 5 functions to be
achieved:
1 switching output (floating changeover contact)
■ Central fault message output
■ Switching a feed pump to a substation
■ Switching the DHW circulation pump (only with Vitotronic 200,
type HO1B) and HO2B
1 analogue input (0 to 10 V)
■ Specifying set boiler water temperature
3 digital inputs
■ External operating mode changeover for 1 to 3 heating circuits
(only with Vitotronic 200, type HO1B and HO2B)
■ External blocking
■ External blocking with central fault message
■ Minimum boiler water temperature demand
■ Fault messages
■ Brief operation of DHW circulation pump (only with Vitotronic 200,
type HO1B and HO2B)
Power supply for DHW circulation pump
DHW circulation pumps with their own internal control unit must be
connected to a separate power supply. Mains connection via the
Vitotronic control unit or Vitotronic accessories is not permissible.
0
1 8
5 8
VITODENS
Specification
Rated voltage 230 V~
Rated frequency 50 Hz
Rated current 2 A
Power consumption 4 W
Rated breaking capacity 2(1) A, 250 V~
of the relay output
Safety category I
IP rating IP 20 D to EN 60529, ensure through
design/installation
Permissible ambient temperature
– Operation 0 to +40 °C
Installation in living spaces or boiler
rooms (standard ambient conditions)
– Storage and transport –20 to +65 °C
7
VIESMANN
107