Electrical Installation; Routing Ebus Lines; Opening The Electronics Box - Vaillant flexoTHERM exclusive VWF 57/4 Installation And Maintenance Instructions Manual

8

Electrical installation

Danger!
Risk of death from electric shock caused
by a residual-current circuit breaker not
working.
In certain cases, residual-current circuit
breakers may not work.
▶
If residual-current circuit breakers are re-
quired to ensure that people are protec-
ted and fire is prevented in line with the
applicable standards, use type A pulse-
current-sensitive residual-current circuit
breakers or type B universal-current-sens-
itive residual-current circuit breakers.
▶
Observe the technical connection conditions for connect-
ing to the power supply network operator's low-voltage
network.
▶
Use the values for the maximum rated power that are
specified in the technical data to determine the required
line cross-sections.
▶
In each case, take into consideration the (on-site) install-
ation conditions.
▶
Connect the product using a fixed connection and an
electrical partition with a contact opening of at least 3 mm
(e.g. fuses or power switches).
▶
Install the electrical partition right next to the heat pump.
▶
Connect the product to the power supply according to the
identification plate.
▶
Fuse this connection using the exact values that are spe-
cified in the technical data.
▶
If the local power supply network operator requires that
the heat pump is controlled using a blocking signal, fit a
corresponding contact switch as prescribed by the power
supply network operator.
▶
Ensure that the sensor lines, e. g. for the VRC DCF re-
ceiver, do not exceed the maximum line length of 50 m.
▶
At lengths of 10 m or more, mains voltage supply lines
must be laid separately from sensor or bus lines. Min-
imum clearance for the extra-low voltage and mains
voltage line 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.
▶
Do not use free terminals on the heat pump as base ter-
minals for further wiring.
1
30 mm max.
1 Connecting wires
▶
Only strip a maximum of 3 cm from the outer sheathing of
the flexible lines.
▶
Secure the conductors in the connection terminals.
0020213395_00 flexoTHERM exclusive Installation and maintenance instructions
2
2 Insulation
Electrical installation 8
–
Max. torque of the connection terminals: 1.2 Nm
8.1

Routing eBUS lines

1. Route the eBUS lines in a star formation from a junction
box to the individual products.
2. Ensure that you do not route the eBUS lines parallel to
the mains connection lines.
– Piping diameter: ≥ 0.75 mm²
8.2

Opening the electronics box

B
A
1. Remove the screw.
2. Pull the bottom of the cover forwards and lift it upwards.
C
21