Vaillant ecoTEC plus VU 446/5-5 (H-GB) Installation And Maintenance Instructions Manual page 29

7.11.4 Establishing the power supply
1. Provide one common power supply for the boiler and
for the corresponding control:
–
Power supply: Single-phase, 230 V, 50 Hz
– Fuse protection: ≤ 3 A
2. Observe all valid regulations.
3. Do not interrupt the mains supply with a time switch or
programmer.
4. Connect the product using a fixed connection and an
electrical partition with a contact gap of at least 3 mm
(e.g. fuses or power switches).
5. Isolation should preferably be by a double pole
switched fused spur box having a minimum contact
separation of 3 mm 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.
6. Use a flexible line for the power supply cable, which is
routed through the grommet into the product.
7. Carry out the wiring. (→ Page 28)
8. Screw the supplied plug to a three-core power supply
cable that complies with the relevant standards.
9. Plug the plug for the connection cable into the 230V
slot on the main PCB.
10. Close the electronics box. (→ Page 28)
11. Make sure that access to the power supply is always
available and is not covered or blocked.
7.11.5 Connecting controls to the electronics
24V=
230V~
1. Open the electronics box. (→ Page 28)
2. Carry out the wiring. (→ Page 28)
0020261389_03 ecoTEC plus Installation and maintenance instructions
≤ 30
mm
– +
Burner 24V=
BUS
off RT
Alternatives 1 ‒ Connecting the weather-com-
3.
pensated eBUS control or eBUS room temper-
ature control:
▶
Connect the control to the BUS plug.
▶
Bridge the 24V=RT plug if it is not already bridged.
Alternatives 2 ‒ Connecting a 24 V extra low
3.
voltage room temperature control:
▶
Instead of the bridge, connect the control to the 24
V plug.
Alternatives 3 ‒ Connecting limit thermostats
3.
for the underfloor heating:
▶
Connect the limit thermostat to the Burner off plug
instead of the bridge.
Alternatives 4 ‒ Connecting the 230 V low
3.
voltage room temperature control:
▶
Connect the control to the L main plug and to the
RT plug.
▶
Remove the bridge from the 24V=RT plug.
4. Close the electronics box.
5. To trigger the Comfort pump operating mode (pump
runs permanently) using a multi-circuit control, change
the diagnostics code D.018 pump operating mode
from Eco (pump runs intermittently) to Comfort.
(→ Page 40)
7.11.6 Connecting the hydraulic accessory
▶
Connect the hydraulic accessory in accordance with the
selected basic system diagram. (→ Page 20)
7.11.7 Connecting additional components
You can use the integrated additional relay to actuate an
additional component.
You can use the optional multi-functional module to actuate
two further additional components.
≤ 30
mm
29