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Cleaver-Brooks
CB Accu-Draft

CB Accu-Draft

Product catalog summary

Overview: The Cleaver-Brooks Accu-Draft is a standalone stack draft control system designed to maintain optimal stack draft throughout the boiler's firing range. It achieves this by modulating the draft damper based on the deviation between the measured draft and the operator-adjusted set point.

Key Features:

PLC Based Control: Utilizes a programmable logic controller for precise draft management.
HMI Touchscreen Interface: Provides user access to control screens, alarm history, and I/O monitoring.
Feedback and Feedforward Options: Enhances control accuracy by considering both current and predictive data.
Adjustable Set Point and Alarm Limits: Allows customization of operational parameters and safety thresholds.
Auto and Manual Modes: Offers flexibility in operation, enabling automatic adjustments or manual control.
Input and Output Monitoring: Facilitates troubleshooting and commissioning support by displaying the status of all discrete I/O wired to the system.
Password Security: Ensures secure access to system settings and configurations.

System Components: The draft damper assembly includes a physical damper, connecting linkage, modulation motor, pressure transmitter, and pressure switch.

Operational Benefits: The CB Accu-Draft Control enhances burner performance by maintaining optimal furnace pressure, improving flame stability, and increasing boiler efficiency. It reduces heat loss after boiler shutdown by automatically closing the outlet damper, making it ideal for systems with multiple boilers sharing a common stack or single boiler applications with high natural draft.

Additional Information: The system includes a 3" HMI for operator access to various screens, including secured screens for loop tuning and initial system setup. Alarm history logs all acknowledged and unacknowledged alarms with timestamps, such as high stack pressure and stack damper not in purge position.

Catalog excerpts

MAXIMIZE BURNER PERFORMANCE Stand Alone Draft Control The Cleaver-Brooks Accu-Draft is a stand-alone stack draft control system designed to maintain stack draft on set point throughout the firing range of the boiler. This is achieved by modulating the draft damper in response to the deviation between the measured draft and an operator adjusted set point. CB Accu-Draft PLC Based Control

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Increase Boiler Efficiency CB Accu-Draft Control improves flame stability by maintaining optimum furnace pressure as well as improving boiler efficiency by reducing heat loss after boiler shutdown by automatically closing the outlet damper.This control is ideal in systems where multiple boilers share a common stack and outlet ductwork, or in a single boiler application with high natural draft. Menu Screen Provides the user access to the stack draft control, system setup, Panelview Configuration and I/O Monitoring. PLC based control HMI touchscreen interface Feedback and feedforward option Adjustable...

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