PART II: INSTALLATION
20
3.5
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.
PS
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EV1
EV2
PGCP
