Electrical System; Notes On Safety For The Electrical Wiring - Baxi TECNO 70-L Installation, Use And Maintenance Instructions

5

Electrical system

5.1

Notes on safety for the electrical wiring

 The electrical wiring must be carried out with the electrical supply disconnected.
 Electrical wiring must be carried out by qualified personnel and in compliance with the regulations currently in
force in the country of destination. Refer to the wiring diagrams.
DANGER  The manufacturer declines all responsibility for modifications or connections different from those shown in the
wiring diagrams.
 Do not invert the neutral with the phase in the electrical supply line. Any inversion would cause a lockout due to
firing failure.
 Check that the electrical supply of the burner corresponds to that shown on the identification label and in this
manual.
 The burners have been set for intermittent operation. This means they should compulsorily be stopped at least
once every 24 hours to enable the control box to perform checks of its own start-up efficiency. Normally the
boiler's thermostat/pressure switch ensures the stopping of the burner.
If this is not the case, it is necessary to apply in series with IN a timer switch that turns off the burner at least once
every twenty-four hours. Refer to the wiring diagrams.
 The electrical safety of the device is obtained only when it is correctly connected to an efficient earthing system,
made according to current standards. It is necessary to check this fundamental safety requirement. In the event
of doubt, have the electrical system checked by qualified personnel.
 The electrical system must be suitable for the maximum input power of the device, as indicated on the label and
in the manual, checking in particular that the section of the cables is suitable for the input power of the device.
 For the main power supply of the device from the electricity mains:
-do not use adapters, multiple sockets or extensions;
-use an omnipolar switch, as indicated by the current safety standards.
 Do not touch the device with wet or damp body parts and/or in bare feet.
 Do not pull the electric cables.
Before carrying out any maintenance, cleaning or checking oper-
ations:
disconnect the electrical supply from the burner by
means of the main system switch;
DANGER
isolate the fuel supply.
DANGER
If the cover is still present, remove it and proceed with the electri-
cal wiring according to the wiring diagrams.
2916089
Electrical system
5.1.1 Electrical connections
Use flexible cables according to EN 60 335-1.
– if in PVC sheath, use at least H05 VV-F;
– if in rubber sheath, use at least H05 RR-F.
All the wires to connect to the burner terminal strip 8)(Fig. 15)
must enter through the supplied fairleads. The fair leads and
precut holes can be used in various ways.
One example is given below:
1 - Pg 13,5
2 - Pg 9
3 - Pg 11
4 - Pg 13,5
14 GB
Three-phase power supply
Fitting hole for fair lead, if required
Fitting hole for fair lead, if required
Fitting hole for fair lead, if required
D3311
Fig. 15