Vaillant ecoTEC plus VU GB 656/4-5 A Installation And Maintenance Instructions Manual page 15

5.6.1 Opening or closing the electronics box
5.6.1.1 Opening the electronics box
1. Remove the front casing. (→ Page 10)
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2. Tilt the electronics box (3) forwards.
3. Detach the left and right clips (1) from the brackets.
4. Fold up the cover (2).
5.6.1.2 Closing the electronics box
1. Close the cover (2) by pushing it downwards onto the
electronics box (3).
2. Ensure that all of the clips (1) audibly click into the
brackets.
3. Tilt the electronics box upwards.
5.6.2 Establishing the power supply
1. Observe the relevant regulations and the enclosed con-
nection diagram.
2. Provide one common electricity supply for the boiler
and for the corresponding controller:
–
Power supply: Single-phase, 230 V, 50 Hz
– Fuse protection: ≤ 3 A
3. Connect the product using a fixed connection and a
partition with a contact opening of at least 3 mm (e.g.
fuses or power switches), see Connection diagram
(→ Page 37).
4. Use a flexible line for the mains connection line, which
is routed through the cable duct into the product.
5. Carry out the wiring. (→ Page 15)
6. Screw the ProE plug supplied to a suitable three-core
mains connection cable which complies with the relev-
ant standards.
7. Close the electronics box. (→ Page 15)
8. Make sure that access to the power supply is always
available and is not covered or blocked.
0020214491_01 ecoTEC plus Installation and maintenance instructions
5.6.3 Carrying out the wiring
Caution.
Risk of material damage caused by incor-
rect installation.
Mains voltage at the incorrect plug terminals
on the ProE system may destroy the elec-
tronics.
▶
Do not connect any mains voltage to the
eBUS terminals (+/-).
▶
Only connect the power supply cable to
the terminals marked for the purpose.
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1. Route the supply lines of the components to be connec-
3
ted through the cable duct provided on the underside of
the product on the left.
2. Use strain reliefs.
3. Shorten the supply lines as necessary.
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 respective ProE plug to the supply line.
9. Check whether all conductors are sitting mechanically
securely in the terminals of the ProE plug. Remedy this
if necessary.
10. Plug the ProE plug into the associated PCB slot.
5.6.4 Installing the controller
▶
Install the controller if necessary.
5.6.5 Connecting controllers to the electronic
system
1. Carry out the wiring. (→ Page 15)
2. If you do not connect a room/timer thermostat, bridge
terminals 3 and 4, if no bridge exists.
3. If you connect a room/timer thermostat to terminals 3
and 4, remove the bridge.
4. If you connect a weather compensator or room thermo-
stat (continuous control – connection terminals 7, 8, 9),
leave the bridge inserted between terminal 3 and 4.
5. If you connect a limit thermostat (contact thermostat)
for underfloor heating systems, remove the bridge on
the blue ProE plug (contact thermostat) and connect the
limit thermostat here.
6. Close the electronics box. (→ Page 15)
7. To access pump operating mode 1 (continuously run-
ning pump) for multi-circuit controllers, set D.18 Pump
operating mode (→ Page 23) from 3 (intermittent pump)
to 1.
Installation 5
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