PART II: INSTALLATION
21
Once the train is installed, connect the gas valves group and pressure switches plugs.
Integrated proving system (burners equipped with LME7x, LMV, LDU)
OIL TRAIN CONNECTIONS
Hydraulic diagrams for light oil supplying circuits
PS
EV1
EV2
/
EV2
EV1
PGCP
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 clo-
ses 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 parameteri-
zed to take place on startup, shutdown, or both. On LME73.831BC the valve proving is parameteri-
zed to take place on startup only.
1
3
2
Key
1 Manual valve
2 Light oil filter
3 Light oil feeding pump
4 One way valve
5 Flexible hoses
6 Relief valve
NOTE:
in plants where gravity or ring feed systems are provided,
install an automatic interception device.
RING CIRCUIT
GRAVITY CIRCUIT
SUCTION CIRCUIT