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6.10
Electrical connections
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 wir-
DANGER
ing diagrams.
Check that the electrical supply of the burner corresponds to that shown on the identification label and in this man-
ual.
The FS1 burners have been set for intermittent operation. This means that the burner should compulsorily be
stopped at least once every 24 hours to enable the electric control box to check its own safety and efficiency at
start-up. Normally the boiler's thermostat/pressure switch ensures that the burner stops. If this is not the case, a
time switch should be fitted in series to TL to stop the FS1 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 electrical 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 absorp-
tion.
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 3 mm gap between the contacts (overvoltage category III), as envis-
aged 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.
Check the electric wiring inside the boiler complies with the national and local safety regulations.
Live and neutral should not be mixed up (this could cause dangerous malfunctions, a loss of protection against
electric shocks, etc..).
Make sure the cable grommets of the connected cables comply with the relevant standards (e.g. EN60730 and
EN60 335).
When wiring the unit, make sure that AC 230V mains voltage cables are run strictly separate from extra low-volt-
age cables to avoid risks of electrical shock hazard.
Before carrying out any maintenance, cleaning or checking
operations:
Disconnect the electrical supply from the burner
by means of the system main switch.
DANGER
Close the fuel shut-off valve.
DANGER
Avoid condensate, ice and water leaks from
forming.
DANGER
If the cover is still present, remove it and proceed with the
electrical wiring according to the wiring diagrams.
Use flexible cables according to EN 60 335-1 standard.
2915832
Installation
Check the lock-out by darkening the flame sensor
after removal of the cover.
ATTENTION
In case of supply 220V without neutral, connect the motor and the
pre-heater thank through delta (the "star" connection is the
original one, made for 380V).
In systems where the run of wiring connecting the thermostat
exceeds 20 metres in length, or in places where the burner is
subject to particularly disturbing electromagnetic interference
(over 10 v/m), you must insert the relay-interface kit item number
3010386.
20
GB
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