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Control unit
3.1 Specification for Ecotronic
Design and function
Modular design
The Ecotronic boiler control unit is a decentralised microprocessor
system. To control the boiler system, the Ecotronic comprises a PCB
and programming unit (display) integrated into the boiler. 3-sensor
cylinder management is part of the standard Ecotronic version.
The Ecotronic can be extended with mixer extensions (max. 3).
Display
Buffer drawings
Boiler
Heating
3
DHW
Additional boiler
Select with
3.2 Accessories for Ecotronic
The standard Ecotronic version can be customised with extension kits
for heating circuits with mixers. Heat consumers or DHW cylinders can
be incorporated into the control system.
Mixer extension kit with integral mixer motor
Part no. 7301 063
KM BUS subscriber
Components:
■ Mixer PCB with mixer motor for Viessmann mixer DN 20 to 50 and
R ½ to 1¼
■ Flow temperature sensor (contact temperature sensor)
■ Plug for connecting the heating circuit pump
■ Power cable (3.0 m long) with plug
■ BUS cable (3.0 m long) with plug
The mixer motor is mounted directly onto the Viessmann mixer DN 20
to 50 and R ½ to 1¼.
Mixer PCB with mixer motor
0
1 8
12
(
1 3
0
Functions
■ Constantly regulating air dampers optimise the heat-up and burnout
procedure
■ Lambda probe enables efficient combustion control and maximum
efficiency
■ Return temperature raising facility
■ Release of the complete heating output during the start phase of the
boiler to the consumers (no output transfer into cylinder via return)
■ Accurate temperature stratification of the heating water buffer cylin-
der with the buffer cylinder control valve
■ Use of the residual boiler heat after burnout
■ Supporting auxiliary and service functions
■ Control of an additional oil burner or a second heat source
■ Protection against overheating through heat transfer to the heating
water buffer cylinder, shutting down the flue gas fan and closing the
primary air damper
Specification
Rated voltage
Rated frequency
Rated current
Power consumption
IP rating
Safety category
Permissible ambient temperature
– during operation
– during storage and transport
Rated breaking capacity of the relay
output for heating circuit pump sÖ
Torque
Runtime for 90 ° ∢
Flow temperature sensor (contact temperature sensor)
4 2
6 6
Secured with a tie.
230 V~
50 Hz
2 A
5.5 W
IP 32D to EN 60529
ensure through appropriate
design/installation
I
0 to +40 °C
–20 to +65 °C
2(1) A 230 V~
3 Nm
120 s
PYROMAT ECO
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