Vaillant ecoTEC sustain 24 Installation And Maintenance Instructions Manual page 24

6. Observe the routing of the power supply cable (1) in the
grommet in order to guarantee that there is no strain.
7. Open the electronics box. (→ Page 23)
1
8. Observe the routing of the power supply cable (1) in the
electronics box in order to guarantee that there is no
strain.
9. Provide one common power supply for the boiler and
for the corresponding control:
–
Power supply: Single-phase, 230 V, 50 Hz
– Fuse: ≤ 3 A
10. Connect the cables. (→ Page 23)
11. Screw the supplied plug (1) to a three-core power sup-
ply cable that complies with the relevant standards.
12. Plug the plug for the power supply cable into a suitable
plug socket.
13. Make sure that access to the power supply is always
available and is not covered or blocked.
14. Close the electronics box.
24
R T
N
L
1
L N
RT
X1
230V~
7.11.5 Connecting controls to the electronics
1 Limit thermostat for
underfloor heating
2 24 V control
1. Ensure that the product is voltage-free.
2. Connect the cables. (→ Page 23)
3. Connect the individual components depending on the
installation type.
Condition: Connecting a limit thermostat for underfloor heating
▶
Remove the bridge and connect the limit thermostat to
the Burner off connection.
▶
For multi-circuit controls (→ Page 26), change the para-
meter d.18 from Eco (intermittently operating pump) to
Comfort (continuously operating pump).
Condition: If you are connecting a control (230 V).
▶
Connect the control to the main plug.
▶
Remove the bridge from the 24V=RT plug.
4. Close the electronics box.
Installation and maintenance instructions ecoTEC sustain 0020253094_05
24 V BUS
– +
Burner 24V=
off
RT BUS
1 2 3
X41
X22
4
3 eBUS control or radio
receiver unit
4 Outdoor temperature
sensor, wired
X1
L N
RT
230V~
X106