37
INSTALLER
2 .14
Electrical connections
TAU UNIT
condensing boilers are fully wired in the fac-
tory. Only the following electrical connections remain to
be made:
− mains electricity supply;
− room thermostat;
− outdoor temperature sensor;
− storage cylinder pump (if relevant).
Proceed as follows to make these connections:
− Remove the front and top panels from the boiler.
− Unscrew the screws (1) then lift and rotate the
control panel (2).
− Connect up the connector (3) and plug it into its
socket (4) in the rear of the control panel.
Once you have made all the necessary connections,
close the control panel, reversing the steps followed to
open it.
See pages 38 and 39 for information on how to
connect the temperature sensors and pumps.
ROTATE
LIFT
1
2
TA
L1 L2 PE N L3
PE
N
L3
230V~50Hz
4
3
9
The following instructions are mandatory:
1
Use a multi-pole magnetic thermal trip switch and
disconnector conforming to IEC-EN standards (with
a contact gap of at least 3 mm).
2 Respect the L1 (Phase) - N (Neutral) and PE (ground)
connections. Keep the ground wire about 2 cm
longer than the power wires.
3 Use cables with a cross section of 1.5 mm2 or more,
complete with end terminals.
4 Always refer to the electrical wiring diagrams in
this manual when performing any electrical work.
5 – Make sure the appliance is connected to an
efficient ground.
5 Make sure the appliance is connected to an effec-
tive ground.
0
It is strictly forbidden to use fuel and/or water pipes
to ground the appliance.
0
Do not route the power cable or room thermostat
cables near hot surfaces (like heating circuit flow
pipes). Use a suitable class of cable if there is any
possibility of contact with parts at temperatures
above 50°C.
The manufacturer declines all responsibility for dama-
ge caused by failing to ground the appliance adequa-
tely or by failure to respect the wiring diagrams provi-
ded in this manual .
