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8
Electrical installation
8.4
Establishing the mains connection
Danger!
e
Risk of death from electric shock!
Mains connection terminals L and N remain
live even if the continuous voltage on/off
switch is turned off.
> Before establishing a mains connection,
switch off the power supply.
Caution.
b
Risk of damage caused by an incorrect
connected voltage.
At mains voltages greater than 253 V and
less than 190 V, the functions may be
impaired.
> Make sure that the rated voltage of the
mains is 230 V.
Caution.
b
Risk of damage caused by incorrect
installation.
A mains voltage at the incorrect plug termi-
nals on the ProE system may destroy the
electronics.
> Only connect the mains connection cable
to the terminals marked for the purpose.
Caution.
b
Risk of damage caused by incorrect
installation.
Connecting wires that have been stripped
too far may cause short circuits and dam-
age the electronics if a strand accidentally
comes loose.
> Only strip the outer sheathing of flexible
cables for a maximum of 3 cm to prevent
short circuits.
> Lay the lines correctly.
> Use strain reliefs.
i
If you install the boiler in safety area 2, it can
only be operated if it is room-sealed. Installation
method B53P is not permitted in this case.
Observe the latest edition of the "IEE Wiring
Regulations – BS7671, Requirements for Electri-
cal Installation".
In IE, reference should be made to the current edition of
the ETCI (Electro-Technical Council for Ireland) rules.
The boiler is supplied for connection to 230 V, ~ 50Hz sup-
ply fused at 3 A rating. Connection to the mains supply
shall be made via a fused 3 pin plug to an unswitched shut-
tered socket, both complying with the requirements of
BS 1363. (Alternatively, connection may be made via a 3 A
fused double pole isolator having a contact opening of at
32
least 3 mm in all poles and supplying the boiler and control-
lers only). The point of connection to the mains supply must
allow complete electrical isolation of the boiler and its ancil-
lary controllers. It should be readily accessible and adjacent
to the boiler. A 3 core flexible cord according to BS 6500
tables 6, 8 or 16 (3 x 0.75 to 3 x 1.5 mm
The nominal voltage of the mains must be 230 V; at mains
voltages greater than 253 V and less than 190 V the func-
tions may be impaired.
> Use a normal commercial mains connection cable that is
compliant with standards.
> Route the mains connection cable through the left cable
duct (¬ fig. 8.1, pos. 4) on the base of the unit.
1
8.4 Cable routing of the mains connection cable
> Use the strain reliefs (1) provided.
> Shorten the mains connection cable as necessary.
> Only strip the outer sheathing of the supply lines to a
maximum of 3 cm.
> Ensure that the inner conductor insulation is not dam-
aged when stripping the outer sheathing.
> Only strip inner conductors just enough to establish
good, sound connections.
> Fit the stripped ends of the conductors with crimp pin
terminals to ensure a secure connection free from loose
strands and to thus prevent short circuits.
> Connect the provided green ProE plug (2) for the mains
connection to the mains connection cable using a screw-
driver.
> Insert the ProE plug into the corresponding PCB slot (L,
N and earth) (¬ fig. 8.4).
> Lay the lines correctly.
> Secure the cable in the electronics box using the strain
reliefs.
> Close the electronics box (¬ section 8.2).
Installation and maintenance instructions ecoTEC plus 0020134833_01
2
) should be used.
2
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