Description
Product Overview
Spirax Sarco BC3250 is a blowdown controller designed for steam boilers. It manages Total Dissolved Solids (TDS) by operating a blowdown valve and controls a bottom blowdown valve via an integrated timer to remove precipitated solids from the boiler shell. The unit works in conjunction with conductivity sensors and a Pt100 temperature sensor to provide accurate monitoring and control, preventing scale buildup and maintaining safe boiler operation.
Key Features
- Front panel with LCD graphics display and five-button keypad for viewing process variables and trend graphs.
- Compatible with CP10, CP30, and CP32 conductivity sensors and Pt100 temperature sensors.
- Selectable pulsed output (10 seconds open, 20 seconds closed) to prevent rapid water level drops in smaller boilers.
- Isolated 0-20 mA or 4-20 mA retransmit output for remote TDS display or management system integration.
- Infrared (IR) communication link for data transfer between adjacent boiler house controllers.
- EIA/TIA-485 Modbus RTU communication capability.
- Pass code protection to prevent unauthorized changes to commissioning parameters.
Technical Specifications
| Parameter | Specification |
|---|---|
| Power Supply | 110 Vac - 240 Vac at 50/60 Hz |
| Power Consumption | 7.5 W maximum |
| Ambient Temperature Limits | 0 to 55°C (32 to 131°F) |
| Enclosure Rating (Front Panel) | IP65 / NEMA Type 4 hose down |
| Conductivity Ranges | 0-9.99, 0-99.9, 0-999, 0-9990 ppm or µS/cm |
| Relay Contacts | 2 x single pole changeover (SPCO), 250 Vac, 3A resistive |
| Weight | Approximately 500 g |
Applications
- Steam boiler TDS control and bottom blowdown automation.
- Condensation contamination detection (CCD) systems.
- Coil boiler control systems.