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Series 8900SH Control Panel Operation And Installation Manual
Section 1 Introduction And Specifications
GLOSSARY:
Entry Codes: The set of two digit numbers that allow the operator to interact with the
control panel.
Error Code: A code shown on the display that indicates a problem exists either in the
sensors or in the computer itself.
Fine Tuning: Utilizing certain codes concerned with the boiler run time and the boiler
staging to carefully "size" the output to the building to obtain the highest efficiency possible.
High Limit: A control mounted near the top of the boiler that shuts down the main flame of
the burner if the boiler temperature exceeds the high limit setting.
Manual Override: When Code 63 is used to manually override the control panel.
Potentiometer: An electronic device used to adjust the sensor temperatures.
Program: A set of commands that tells the computer which calculations to carry out.
Ratio Control: The control that allows the operator to vary the Return Water Line
temperature in relation to the drop in outside temperature.
Relay: An electromechanical device that opens or closes a current path on demand.
Sensor: A device used with the control panel to measure relative heat and cold.
Outside Temperature Shutdown: The pre-selected temperature that, when reached, shuts
the boiler system off.
Stage: The position of a boiler in the firing sequence.
Supply Water Line: The supply water line is the line that provides heated water from the
boilers to the building.