西门子(SIEMENS) LDU11燃气检漏控制器

产品名称: LDU11燃气检漏控制器(SIEMENS)所属品牌: 西门子应用行业: 检漏器详细介绍:LDU11燃气检漏控制器品牌：SIEMENS（西门子）

产地：德国 产品介绍The LDU11... control detects leakage of the shut-off valves on gas trains with two safety shutoff valves. During each burner cycle, the LDU control unit automatically sequences, and if a leak is detected, initiates a lockout and prevents the burner from starting up.Performs leak test of the gas shut-off valves before start-up and/or immediately after burner shut-downNo inlet gas pressure limitationsEasy-to-read dial indicates progress of test programAbility to eliminate or leak test the vent valveCost effective control improves system safetyGlobally Approved ?cULus, FM, CEThe LDU11 (or 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 eitherprior to burner start-upimmediately after the controlled shutdown, orboth prior to burner start-up and immediately after shutdownThe valve leak test is completed in two stages:First test phase Test1, evacuates the pressure between the gas valves to test the upstream gas shutoff valve. The pipe between the gas valves is monitored by a leak detect pressure switch for no increase in pressure.Second test phase Test2, pressurizes the area between the gas valves to test the downstream safety shutoff valve. The pipe between the gas valves is monitored by the leak detect pressure switch for no decrease in pressure.If the leak detect switch signals excessive gas pressure increase during the first test phase Test1, or decrease during the second test phase Test2, the LDU control will lockout and prevent burner start-up. The indicator dial on the front of the unit indicates the progress of the leak test. When a fault occurs, the indicator dial stops at the time of lockout, and indicates which of the valves is leaking. In the event of a lockout, the reset button on the front of the control will light orange to indicate a fault.

Pushing the clear window in front of the indicator dial once will reset the LDU control. DO NOT hold in the reset button. The LDU may also be reset with a remote button (see wiring diagram). 型号表型号主电压HzLDU11.523A27AC220-240V50...60LDU11.523A17AC100-110V50...60 技术参数主要参数主电压AC220V -15%...AC240V +10%AC100V -15%...AC110V +10%主频率50Hz ±6%外部保险丝10A功率 -测试3.5VA-运行2.5VA重量4 lbs保护等级NEMA 1，2，5，12，13环境条件运输环境IEC 60 721-3-2内部条件class 2K2温度范围-58...+140ºF机械条件class 2M2湿度<95%运行环境IEC 60 721-3-3内部条件class 3K5机械条件class 3M2温度范围-5...+140ºF湿度<95%不得进水