Temperature Control System*

The Banner-Day Temperature Control System* represents state-of-the-art technology in industrial and commercial bakery oven temperature control.

Use of a DSI ignition system in combination with a PLC-based controller systematically and precisely controls specific oven zone temperatures:

• Banner-Day's dual element control scheme turn off burners in small or select groups within each zone based on firing rate of the burners.
• As the zone air header pressure (firing rate) falls in response to an increase in zone temperature above the set-point, several burners are turned off, allowing the remaining burners to carry the load of the "off" burners. This will be repeated if the header pressure continues to fall.
• As the zone air header pressure increases in response to a decrease in zone temperature below set-point, and the burners will begin to be turned back on. The result is an effective zone turndown ratio of nearly 12:1.
• Balance is quickly achieved between the number of lit burners and the zone heat load, with a zone air header pressure that maintains lateral heat control and burner efficiency.
• The final result of this strategy is a system that has the ability to maintain oven zone temperatures within ± 2°F of set-point.

In cases when less-precise temperature control is necessary, a single-element temperature control scheme is used in place of the PLC. This also reduces cost.

*Patent Pending

Click to view the Burner Staging Scheme (pdf 76k)

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