Vaillant ecoTEC plus Installation And Maintenance Instructions Manual page 24

▶
Check that there is no voltage.
7.12.1 Opening the electronics box
▶
Open the electronics box as shown in the illustration.
7.12.2 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 any mains voltage to the
eBUS terminals (+/-).
▶
Only connect the mains 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. Use strain reliefs.
3. If required, shorten the connection cables.
≤ 30 mm
4. Strip the flexible line as shown in the figure. In doing so,
ensure that the insulation on the individual conductors
is not damaged.
5. Only strip inner conductors just enough to establish
good, sound connections.
6. To avoid short circuits resulting from loose individual
wires, fit conductor end sleeves on the stripped ends of
the conductors.
7. Screw the respective plug to the connection cable.
8. Check whether all conductors are sitting mechanically
securely in the terminals of the plug. Remedy this if
necessary.
9. Plug the plug into the associated PCB slot; see the wir-
ing diagram in the appendix.
24
7.12.3 Connecting the shift-load cylinder to the heat
generator electronics
1. Open the electronics box. (→ Page 24)
2. Carry out the wiring. (→ Page 24)
1
2
3
Caution.
Risk of material damage caused by incor-
rect cable routing
Cables may become damaged if they come
into contact with hot parts of the product.
▶
Lay cables in such a way that they do not
touch any hot parts of the product.
3. Route the shift-load cylinder's cable harness (2) with the
grommets (3) through the attached cable ducts on the
shift-load cylinder and on the heat generator.
4. On the boiler, use the grommet (1).
5. Secure the grommets on the cable ducts using the en-
closed spring clips.
1
6. Guide the pump cable (2) with the plug X12 along the
outside of the electronics box.
7. Plug the pump cable's plug X12 into the slot X12 (right-
hand side of the PCB).
8. Guide the sensor cable (1) with the plug X31 to the
PCB.
9. Plug the sensor cable's plug X31 into the slot X31 (left-
hand side of the PCB).
10. Secure the cables over the cable terminals in the elec-
tronics box.
Installation and maintenance instructions ecoTEC plus 0020244998_04
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