Carrying Out The Wiring; Connecting The Circulation Pump; Actuating A Circulation Pump With An Ebus Controller - Vaillant VWL 57/5 IS Operating, Installation And Maintenance Instructions

6 Electrical installation
6.11

Carrying out the wiring

Danger!
Risk of death from electric shock!
Continuous voltage is present at power sup-
ply terminals L1, L2, L3 and N:
▶
Switch off the power supply.
▶
Check that there is no voltage.
▶
Secure the power supply against being
switched back on.
Danger!
Risk of injury and material damage
caused by incorrect installation.
Mains voltage at incorrect terminals and plug
terminals may destroy the electronics.
▶
Ensure that the mains voltage is correctly
disconnected from the safety extra-low
voltage.
▶
Do not connect any mains voltage to ter-
minals BUS, S20, S21, X41.
▶
Only connect the power supply cable to
the terminals that are marked for the pur-
pose.
Note
There is a safety extra-low voltage (SELV) at con-
nections S20 and S21.
Note
If the energy supply company lockout function is
used, connect a potential-free normally open con-
tact with a breaking capacity of 24 V/0.1 A to con-
nection S21. You must configure how the connec-
tion works in the system control. (For example, if
the contact is closed, the electric back-up heater
is blocked.)
1. Route the sensor and bus lines into the product through
the rear of the product (→ Page 28).
Note
The cables must fit through the correspond-
ing grommet.
2. At lengths of 10 m or more, mains voltage connection
cables must be laid separately from sensor or bus lines.
Minimum clearance for the extra low-voltage wire and
power supply cable at a line length of > 10 m: 25 cm. If
this is not possible, use shielded lines. Lay the shielding
on one side of the sheet for the product's electronics
box.
3. Shorten the connection cables according to require-
ments.
32
4. To prevent short circuits if a strand accidentally comes
loose, only strip the outer sheathing of flexible lines to a
maximum of 30 mm.
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 plug to the connection cable.
9. Check whether all conductors are inserted mechanically
securely in the terminals of the plug. Remedy this if
necessary.
10. Plug the plug into the associated PCB slot.
11. Use the strain reliefs (1).
6.12

Connecting the circulation pump

1. Carry out the wiring. (→ Page 32)
2. Route the 230 V connection cable for the circulation
pump from the right and into the control PCB's electron-
ics box.
3. Connect the 230 V connection cable to the plug from
slot X11 on the control PCB and plug it into the slot.
4. Connect the connection cable for the external button
using terminals 1 (0) and 6 (functional drawing) on the
X41 edge connector, which is supplied with the control.
5. Plug the edge connector into slot X41 on the control
PCB.
6.13 Actuating a circulation pump with an eBUS
controller
1. Ensure that the circulation pump is correctly paramet-
rised in the system control.
2. Select a hot water programme (preparation).
3. Parametrise a circulation programme in the system
control.
◁
The pump runs during the time period specified in
the programme.
Installation and maintenance instructions Hydraulic station 0020257319_02
≤ 30 mm
1