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4.9
Electrical wiring
Notes on safety for the electrical wiring
The electrical wiring must be carried out with the electrical supply disconnected.
Electrical wiring must be made in accordance with the regulations currently in force in the country of destination and
by qualified personnel. Refer to the wiring diagrams.
The manufacturer declines all responsibility for modifications or connections different from those shown in the wiring
DANGER
diagrams.
Check that the electrical supply of the burner corresponds to that shown on the identification label and in this manual.
The burner has been type-approved for intermittent use.
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, burner stopping is guaranteed by the boiler's thermostat/pressure
switch.
If this is not the case, a time switch should be fitted in series to TL to stop the burner at least once every 24 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. Do not use the gas tubes as an earthing system for elec-
trical devices.
The electrical system must be suitable for the maximum power absorption of the device, as indicated on the label and
in the manual, checking in particular that the section of the cables is suitable for that level of power absorption.
For the main power supply of the device from the electricity mains:
- do not use adapters, multiple sockets or extensions;
- use a multiple pole switch with at least a 3mm gap between the contacts (overvoltage category III), as envisaged
by the present 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 opera-
tions:
Before carrying out maintenance, cleaning or
checking operations, identify and disconnect the
main electrical power to the burner and identify and
close the manual shut-off valve on the gas supply
drop-line to the burner.
Disconnect the electrical supply from the burner by
means of the main system switch.
DANGER
Close the fuel inlet connection.
DANGER
Avoid condensate, ice and water leaks from form-
ing.
DANGER
Installation
If the cover is still present, remove it and proceed with the electrical
wiring according to the wiring diagrams.
Use flexible metal conduit in compliance with the National Electrical
Code, NFPA 70 and Parts 1 and 2 of the Canadian Electrical Code
as appropriate.
After carrying out maintenance, cleaning or check-
ing operations, reassemble the cover and all the
safety and protection devices of the burner.
23
GB
20051011
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