Electrical Installation - Vaillant ecoTEC exclusive 843 Installation And Maintenance Instructions Manual

5 Installation
Caution.
Risk of poisoning due to escaping flue
gas.
Mineral-oil-based greases can damage the
seals.
▶
Instead of grease, use only water or com-
mercially available soft soap to aid install-
ation.
2. Install the flue pipe using the installation manual.
5.8.2 Replacing the connection piece for the
air/flue pipe as required
1. Replace the connection piece for the air/flue pipe as
required. The product-specific standard equipment is
listed under Technical Data in the appendix.
2. Remove the connection piece for the air/flue pipe.
(→ Page 14)
5.8.2.1 Removing the connection piece for the
air/flue pipe
A
1. Insert a screwdriver into the slot between the measuring
stub pipes.
2. Press the screwdriver carefully down.
3. Turn the connection piece anticlockwise as far as it will
go and then remove it by pulling it upwards.
5.9

Electrical installation

Only qualified electricians may carry out the electrical install-
ation.
Danger!
Risk of death from electric shock!
Mains connection terminals L and N remain
live even if the on/off switch is turned off.
▶
Switch off the power supply.
▶
Secure the power supply against being
switched on again.
14
5.9.1
▶
5.9.2
C
1.
B
2.
3.
4.
5.
6.
7.
8.
9.
10. Plug the plug into the associated PCB slot; see the
Installation and maintenance instructions ecoTEC exclusive 0020193968_03
Opening the electronics box
B
Open the electronics box as shown in the illustration.
Carrying out the wiring
Caution.
Risk of material damage caused by incor-
rect installation.
Mains voltage at incorrect terminals and plug
terminals may destroy the electronics.
▶
Do not connect any mains voltage to the
eBUS terminals (+/-).
▶
Only connect the mains connection cable
to the terminals marked for the purpose.
Route the supply lines of the components to be connec-
ted through the cable duct provided on the underside of
the product on the left.
Use strain reliefs.
Shorten the supply lines as necessary.
30 mm max.
To prevent short circuits if a strand accidentally comes
loose, only strip the outer sheathing of flexible lines to a
maximum of 30 mm.
Ensure the inner conductor insulation is not damaged
when stripping the outer sheathing.
Only strip inner conductors just enough to establish
good, sound connections.
To avoid short circuits resulting from loose individual
wires, fit conductor end sleeves on the stripped ends of
the conductors.
Screw the respective plug to the supply line.
Check whether all conductors are sitting mechanically
securely in the terminals of the plug. Remedy this if
necessary.
connection diagram in the appendix.
A