Boiler house Level controls
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Local regulations may restrict the use of this product to below the conditions quoted. In the interests of development and improvement of the product, we reserve the right to change the specification without notice. © Copyright 2020
TI-P693-24 EMM Issue 1
LCR2652 BHD50 Level Controller, Operating and Display Unit Description The functional unit consisting of the operating and display unit BHD50 and the LCR2652 level controller in conjunction with level transmitter LP20/LP21/PA420 is used as water level controller and as a limit switch, for instance in steam boilers, (pressurized) hot- water installations as well as condensate and feedwater tanks. One BHD50 can be used with a LCR2652 and a BCR3250 controller to provide a combined level and TDS control system. A level limit switch (LCS3050 and/or LCS3051) can be connected to the LCR2652 to signal and log level alarms on the BHD50. The LCR2652 level controller processes the level-dependent current signal from the LP20/LP21/PA420 level transmitter. This input signal is recognised by the controller as 0 and 100 % of the boiler measuring range. The operating and display unit BHD50 and the level controller LCR2652 form a functional unit featuring the following properties: - 3-position stepping controller with proportional-plus-integral control action (PI controller) and control of an electrically actuated control valve (VMD - Valve Motor Drive)
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- Continuous controller as PI controller for the control of an electro-pneumatically operated control valve and a relay for pump ON/OFF control - Indication of MIN/MAX water level limit - Fill or discharge control - Level damping filter - Current inputs for steam and feedwater flowrate (2 or 3-element control) - Actual value output 4-20 mA - Level limit switch alarm input (24Vdc), to display the status of any LCS3050 or LCS3051 level limit switch - Indication of actual value (indicated in percent and as bar graph) - Standardized measuring range when the level transmitter LP20/LP21/PA420 is connected - Indication/adjustment of control parameters - Adjustment and evaluation of current inputs for steam and feedwater flowrate (2 or 3-element control) - Trend record - Indication and listing of errors, alarms and warnings - Test of MIN/MAX output relays - Manual/automatic operation - Modbus RTU (RS232, RS422 or RS485) and Modbus TCP (Ethernet 10/100Mb) communication - Password protection
BHD50
Typical applications - Steam Boilers - Hot-Water Installations - Condensate and Feedwater Tanks
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