Electrical Installation - Vaillant ecoTEC plus VU 446/5-5 (H-GB) Installation And Maintenance Instructions Manual

5.6.2 B23 installation
Applicability: Except Great Britain, Except Ireland
A flue system for permitted unit type B23 (atmospheric gas-
fired wall-hung boilers) requires careful planning and imple-
mentation.
▶
Observe the product's technical data when planning.
▶
Use the recognised rules of technology.
5.6.3 Installation with flue non-return flap
When installing a flue non-return flap, you must set the min-
imum output in order to prevent ignition problems.
▶
Use diagnostics code D.085 to set the minimum output.
(→ Page 29)
Setting the minimum output of the product
VU 446/5-5 (H-GB)
VU 606/5-5 (H-GB)
5.7

Electrical installation

Danger!
Risk of death from electric shock!
Power supply terminals L and N remain live
even if the on/off button is turned off:
▶
Switch off the power supply.
▶
Secure the power supply against being
switched back on again.
Only qualified electricians may carry out the electrical install-
ation.
5.7.1 Opening/closing the electronics box
5.7.1.1 Opening the electronics box
1. Remove the front casing. (→ Page 10)
C
2. Tilt the electronics box forward.
3. Loosen the four clips from the retainers (A) and (B) on
the electronics box.
4. Hinge the cover (C) up.
0020261389_02 ecoTEC plus Installation and maintenance instructions
D.085 Setting D.085 for
(factory the flue non-
setting) return flap
8 kW 13 kW
11 kW 16 kW
B x 2
A x 2
5.7.1.2 Closing the electronics box
1. Close the cover by pushing it downwards onto the elec-
tronics box.
2. Ensure that all of the clips audibly click into the retain-
ers.
3. Tilt the electronics box upwards.
5.7.2 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 the eBUS terminals (+/‑)
to the mains voltage.
▶
Only connect the power supply cable to
the terminals marked for the purpose.
230V
24V / eBus
1. Route the connection cables for the components to
be connected in the cable trunking on the left of the
underside of the product.
2. Use the strain reliefs (1).
3. Shorten the connection cables as necessary.
30 mm max.
4. Only strip the outer sheathing of flexible lines to a max-
imum of 30 mm to prevent short circuits if a strand acci-
dentally comes loose.
5. Ensure the inner conductor insulation is not damaged
when stripping the outer sheathing.
6. Only strip inner conductors just enough to establish
good, sound connections.
7. To avoid short circuits resulting from loose individual
wires, fit conductor end sleeves on the stripped ends of
the conductors.
8. Screw the plug to the connection cable.
9. Check whether all conductors are properly fastened
to the connection terminals of the plug. Remedy this if
necessary.
10. Plug the plug into the slot provided on the PCB in ac-
cordance with the wiring diagram in the appendix.
Installation 5
1
19