Siemens Landis LDU11.523A27 gas proving control box

Description

Siemens Landis LDU11.523A27 Gas valve proving system, t3=5s, t4=5s, AC220…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… 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.

• The LDU11 control unit is used in a gas-fired combustion system with or without a vent valve in the gas train.
• Installed with one or two pressure switches mounted between the gas valves, the LDU automatically initiates gas valve proving either prior to burner start-up immediately after the controlled shutdown, or both prior to burner start-up and immediately after shutdown

Feature

• Performs leak test of the gas shut-off valves before start-up and/or immediately after burner shut-down
• No inlet gas pressure limitations
• Easy-to-read dial indicates progress of test program
• Ability to eliminate or leak test the vent valve
• Cost effective control improves system safety
• Globally Approved – cULus, FM, CE