SIEMENS GAS PROVING SYSTEM LDU11.323A27 240V.
The LDU11... valve proving system is designed for use with shutoff valves in connection with gas burners and gas appliances. In the event of inadmissible leakage, the system prevents the burner from starting up. The LDU11... system conforms to the requirements of EN1643 covering automatic shutoff valves for use with gas burners and gas appliances to EN161. The LDU11... and this Data Sheet are intended for use by OEMs which integrate the valve proving system in their products. The LDU11... is designed for automatic gas valve proving (leakage test) based on the pressure proving principle. It is for use on gas-fired combustion plant with or without vent pipe to atmosphere. In the case of plants with no vent pipe where EN standards apply, the notes given in «Connection examples without vent pipe to atmosphere» must be observed.