PART II: INSTALLATION
26
Integrated proving system (burners equipped with LME7x, LMV, LDU)
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).
WARNING: (only for double stage and progressive burners) The burner is provided with an electrical bridge
between terminals 6 and 7; when connecting the high/low flame thermostat, remove this bridge before connecting
the thermostat.
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
The system must comply with the current regulations.
Earth the system; always check in advance the connection, functionality and compliance with the health and safety principles 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.
In connecting the supply wires to the burner MA terminal strip, ensure that the earth wire is longer than the phase and neutral wires.
Careful not to invert the phase and neutral connections
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 enclosed), 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 Techni-
cal 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.
For further information, refer to the electrical diagram.
This paragraph describes the integrated proving system operation sequence:
At the beginning both the valves (EV1 and EV2) must be closed.
Test space evacuating: EV2 valve (burner side) opens and keep this position for a preset
time (td4), in order the bring the test space to ambient pressure.Test atmospheric pressure:
EV2 closes and keep this position for a preset time (test time td1). The pressure switch
PGCP has not to detect a rise of pressure.
Test space filling: EV1 opens and keep this position for a preset time (td3), in order to fill the
test space.
Test gas pressure: EV1 closes and keep this position for a preset time (td2). The pressure
switch PGCP has not to detect a pressure drop down.
If all of the test phases are passed the proving system test is successful, if not a burner lockout
happens.
On LMV5x and LMV2x/3x and LME73 (except LME73.831BC), the valve proving can be
parameterized to take place on startup, shutdown, or both.
On LME73.831BC the valve proving is parameterized to take place on startup only.
PS
EV1
EV2
/
EV2
EV1
PGCP
