Unigas LMV2 Series, Manual Of Installation - Use - Maintenance

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PART II: INSTALLATION
21
ELECTRICAL CONNECTIONS
Follow the electrical diagrams attached to the manual for the connections to the terminal strip.
The electrical panel is supplied complete with a terminal strip for the connection to the system electrical line and, in case of on board
control panel, a plug for the connection to the modulation probe (if any).
Rotation of electric motor
Once the electrical connection of the burner is executed, remember to check the rotation of the electrical motor (pump motor if any, and
fan motor) . The motor should rotate according to the “arrow” symbol on the body. In the event of wrong rotation, change 2 of the 3 pha-
ses of the three-phase power cable and check again the rotation of the motor.
Configuration with separate electrical panel (optional)
The length of the electrical cables must comply with the provisions in the technical sheets of the equipment or the advice the company
gives at the time of the offer/contract.
Provide sufficient protections for cables and connectors, taking into consideration positioning spaces and the panel-burner tracing sur-
faces. Always consult beforehand the electrical drawings supplied in relationship to the topography of the feeding systems.
Any cable connection or hook-up to the grid must be carried out by qualified, informed and trained personnel,
directly coordinated and authorized by Technical Service. Always check in advance that the system electrical
interlock is fitted with a safety circuit breaker.
WARNING! It is forbidden to use the fuel pipes for the execution and/or completion of the grounding
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The system must comply with the current regulations.
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Earth the system; always check in advance the connection, functionality and compliance with the health and safety prin-
ciples of the earth cable. If in doubt, ask for an accurate inspection by qualified technical engineers.

Check the connection to the grounding system.

Do not use any extraneous conductive parts (i.e. fuel feeding pipes, metal structures ...) to connect the burner to ground.
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In connecting the supply wires to the burner MA terminal strip, ensure that the earth wire is longer than the phase and
neutral wires.
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Careful not to invert the phase and neutral connections
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Fit the burner power line with an omnipolar disconnector and differential switch, a thermo-magnetic circuit breaker or
fuses.

Supply the burner with a flame retardant cable with a section suitable to the installed power (see electrical diagram enclo-
sed), paying attention to the voltage values printed on the burner plate.

Always check in advance the protection from overcurrents and electromagnetic interference of the power supply. If these
and other values do not match the threshold data stated by the manufacturer, isolate the burner from all power sources
and contact the Authorized Technical Service urgently.

Check that the voltage of the system and burner motors match the voltage of the power grid (+/- 10%).

Ensure the IP protection rating is consistent with the installation place and environment characteristics

Before carrying out any operation on the machine electrical panel, open the system omnipolar disconnector and move
the switch on the burner panel to OFF.

In any case:

use suitably protected and safe burner/boiler supply and tracking cables;

avoid using extensions, adaptors or multiple sockets.
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For further information, refer to the electrical diagram.
ATTENTION: check the calibration of the thermal relay sensor (+5% ÷ +10% rated value).
DANGER! Incorrect motor rotation can seriously damage property and injure people.