Honeywell EXCEL 5000 User Manual

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Honeywell EXCEL 5000 User Manual Manual pdf 236 page image

ALPHABETIC REFERENCE EXCEL CARE CONTROL ICONS74-5577–33 (US) 238EN2B-0184 GE51 R0518 (Europe)I/O Dialog BoxInput Two through thirty two inputs.Output Two digital outputs.Internal Parameters None.Zero Energy Band / ZEBFunction Determine setpoints to maintain a predetermined comfort band divided into heating,cooling, and zero energy bands. ZEB subdivides a predetermined comfort band into:• Heating band• Zero energy band• Cooling bandThe zero energy band represents a temperature range in which the roomtemperature may vary without a need for heating or cooling energy.Setpoint optimization results in demand-related setpoint control (cascade* input) ofthe central air conditioning plant as a function of the individual room loads to use thelowest possible energy requirements outside the zero energy band.*The term “cascade” implies that the outputs of this function are to be used as inputsfor another controller.I/O Dialog BoxExcel Web / Excel Web IIInputs Five analog inputs where:X1 (Excel Web / Excel Web II: TMax) = Highest zone temperatureX2 (Excel Web / Excel Web II: TMin) = Lowest zone temperatureX3 (Excel Web / Excel Web II: TAvg) = Average zone temperature