BC3250 Boiler Blowdown Controller

Where BC3250 fits in TDS blowdown control

BC3250 sits on the model-specific end of the TDS blowdown controls route. It is used on steam boilers where dissolved solids must be monitored continuously and blowdown has to respond more consistently than a manual routine can provide.

Rather than acting only as a measurement device, BC3250 combines conductivity input, blowdown valve control and bottom blowdown timing in one controller. That makes it a clearer fit for projects already moving from general boiler water quality control into product-level selection.

Typical duties and selection intent

BC3250 is a good route when the project needs to:

• stabilise boiler water TDS under variable boiler load
• reduce avoidable blowdown losses caused by inconsistent manual practice
• combine continuous TDS control with bottom blowdown timing
• pass operating data into a wider control or monitoring system
• support contaminated condensate monitoring based on conductivity

If the immediate need is still the measurement side rather than the control side, continue into boiler water conductivity meters.

Capabilities confirmed by current documentation

The current technical and installation documentation confirms that BC3250 supports:

• automatic TDS blowdown control against a setpoint
• an integrated timer for bottom blowdown routines
• pulse blowdown logic for smaller boilers
• trend display, alarm and diagnostic functions
• 0/4-20 mA retransmission, RS485 / Modbus RTU and infrared communication
• conductivity probe input from CP10, CP30 or CP32
• optional Pt100 temperature input for display and compensation

It is documented for indoor panel, DIN rail or backplate mounting and is used in steam boiler blowdown and contaminated condensate monitoring arrangements.

What to confirm before specification

Before final specification, confirm where the probe will be mounted, whether temperature compensation is needed, how the blowdown valve package will be arranged and whether the site needs data retransmission or Modbus connectivity.

It also helps to confirm whether the wider project includes only continuous TDS control or a broader boiler house upgrade involving boiler controls, heat recovery systems or boiler water management guidance from controlling TDS in boiler water.