Electrical installation
30 Installation and maintenance instructions ecoTEC plus 0020116700_01
8
8.4.2 Connecting controllers to the electronic
system
b
Caution.
Risk of damage caused by incorrect
installation.
Connecting wires that have been stripped
too far can cause short circuits and damage
the electronics if a strand accidentally
comes loose.
> Only strip the outer sheathing of flexible
cables for a maximum of 3cm to prevent
short circuits.
> Lay the lines correctly.
> Use strain reliefs.
b
Caution.
Risk of damage from incorrect installa-
tion.
A mains voltage at the incorrect plug termi-
nals on the ProE system can destroy the
electronics.
> Do not connect a mains voltage to the
eBUS terminals (+/-).
i
Make sure that the conductors are securely fas-
tened to the plug terminals of the ProE plug.
> Open the electronics box (¬section8.2).
> Lead the supply lines of the components to be connected
(e.g. external controllers, external sensors) through the
left cable duct (¬fig. 8.1, pos. 4) on the underside of the
boiler.
> Use the strain reliefs (1) provided.
> Shorten the supply lines as necessary.
> Only strip the outer sheathing of the supply lines for a
maximum of 3 cm.
> Ensure inner conductor insulation is not damaged during
stripping of outer sheathing.
> Only strip inner conductors sufficient to make good
sound connections.
> Fit the stripped ends of the conductors with crimp pin
terminals to ensure a secure connection free from loose
strands to prevent short circuits.
> Connect the ProE plug to the supply lines of the control-
ler using a screwdriver.
> Insert the ProE plug into the associated PCB slot
(¬figs.8.3 and 8.4).
> Lay the lines correctly.
> Secure the cable in the electronics box using the strain
reliefs.
> If you do not connect a room/timer thermostat to the
boiler, then bridge the input RT 24 V, if no bridge exists.
> If you connect a room/timer thermostat to the boiler,
then remove the bridge at input RT 24 V, if a bridge
exists.
> If you connect a weather compensator or room tempera-
ture controller via eBUS, then bridge input RT 24 V, if no
bridge exists.
> Close the electronics box (¬section8.1).
> In order to achieve pump operating mode "Comfort"
(continuously running pump) for multi-circuit controllers,
change diagnosis code D.018 Pump operating mode from
"Eco" (intermittent pump) to "Comfort" (¬section11.1.2).
i
Please note that the bridge at the ProE plug
(Burner off) must be removed when connecting
a maximum thermostat (contact thermostat) for
underfloor heating.
8.5 Connecting additional components
b
Caution.
Risk of damage caused by incorrect
installation.
Connecting wires that have been stripped
too far can cause short circuits and damage
the electronics if a strand accidentally
comes loose.
> Only strip the outer sheathing of flexible
cables for a maximum of 3cm to prevent
short circuits.
> Lay the lines correctly.
> Use strain reliefs.
You can actuate an additional component with the aid of
the auxiliary relay that is installed in the ecoTEC plus (only
ecoTEC 637/837), and two other components with the multi-
functional module.
The following components can be actuated:
– Circulation pump
– External pump
– Cylinder charging pump
– Extractor hood
– External solenoid valve
– External fault signal
– Solar pump (not active)
– eBUS remote control (not active)
– Legionella protection pump (not active)
– Solar valve (not active)
8.5.1 Connecting the auxiliary relay (grey
connector on PCB) (only ecoTEC 637/837)
i
You can connect the additional component to
the integrated auxiliary relay using the grey plug
on the PCB.
> Perform the wiring in the same way as in ¬section8.4.
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