Unigas TP1030, Руководство пользователя, Страница: 16 / 108

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Integrated proving system (burners equipped with LME7x, LMV, LDU)
This paragraph describes the integrated proving system operation sequence:
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At the beginning both the valves (EV1 and EV2) must be closed.
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Test space evacuating: EV1 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: EV1 closes and keep this position for a preset time (test time td1). The
pressure switch PGCP has not to detect a rise of pressure.
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Test space filling: EV2 opens and keep this position for a preset time (td3), in order to fill the test space.
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Test gas pressure: EV2 closes and keep this position for a preset time (td2). The pressure switch PGCP has not to detect a pres-
sure 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, shut-
down, or both.
On LME73.831BC the valve proving is parameterized to take place on startup only.
Once the train is installed, connect electrically all its elements: gas valves group, pressure switches, gas proving system.
Electrical connections
To execute the electrical connections, proceed as follows:
1
remove the cover from the electrical board, unscrewing the fixing screws;
2 execute the electrical connections to the supply terminal board as shown in the following diagrams,
3 check the direction of the fan motor (see next pargraph)
4 refit the panel cover.
Rotation of fan motor
Once the electrical connection of the burner is executed, remember to check the rotation of the fan motor. The motor should rotate
according to the indication on the body. In the event of wrong rotation, reverse the three-phase supply and check again the rotation of
the motor.
ATTENTION: once the gas train is mounted according to the diagram on Fig. 3, the gas proving test mus be performed,
according to the procedure set by the laws in force.
Respect the basic safety rules. make sure of the connection to the earthing system. do not reverse the phase and neutral
connections. fit a differential thermal magnet switch adequate for connection to the mains.
ATTENTION: before executing the electrical connections, pay attention to turn the plant’s switch to OFF and be sure that
the burner’s main switch is in 0 position (OFF) too. Read carefully the chapter “WARNINGS”, and the “Electrical connec-
tions” section.
WARNING: 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.
IMPORTANT: Connecting electrical supply wires to the burner teminal block MA, be sure that the ground wire is
longer than phase and neutral ones.
PS
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EV1
EV2
PGCP