Vaillant ecoTEC sustain 24 Installation And Maintenance Instructions Manual page 23

7.11.1 Opening the electronics box
B
7.11.2 Cable route
230V
2
1 24-V eBUS cable route
2 230 V cable route
7.11.3 General information about connecting
cables
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 (+/-) and RT 24 V terminals.
▶
Only connect the connection cable to the
terminals marked for the purpose.
1. Route the connection cables of the components to be
connected through the grommet provided on the under-
side of the product on the left.
2. Ensure that the grommet is plugged in correctly and
that the cables have been routed correctly.
3. Ensure that the grommets envelop the connection
cables tightly and with no visible gaps.
4. Use strain reliefs.
0020253094_05 ecoTEC sustain Installation and maintenance instructions
A
B
1
24V / eBUS
5. If required, shorten the connection cables.
≤ 30 mm
L
N
PE
≤ 40 mm
+
-
≤ 30 mm
6. Strip the flexible cables as shown in the figure. In doing
so, ensure that the insulation on the individual conduct-
ors is not damaged.
7. Only strip inner conductors just enough to establish
stable connections.
8. To avoid short circuits resulting from loose individual
wires, fit conductor end sleeves on the stripped ends of
the conductors.
9. Screw the respective plug to the connection cable.
10. Check whether all conductors are inserted mechanic-
ally securely in the terminals of the plug. Remedy this if
necessary.
11. Plug the plug into the associated PCB slot.
–
In doing so, observe the wiring diagram in the ap-
pendix.
7.11.4 Establishing the power supply
1. Observe all valid regulations.
–
The applicable regulations state that the connection
must be established via an electrical partition with a
contact gap of at least 3 mm at each pole.
–
Power supply cable: Flexible duct
2. Make sure that the rated voltage of the mains is 230 V.
1
3. Route a three-core power supply cable that complies
with the relevant standards through the grommet and
into the product.
4. Do not interrupt the mains supply with a time switch or
programmer.
5. Isolation should preferably be by a double pole
switched fused spur box having a minimum contact
separation of 3mm on each pole. The fused spur box
should be readily accessible and preferably adjacent to
the boiler. It should be identified as to its use.
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