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Engineering Manual o.. - HVAC.Amickracing

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INDEXOperator interface 167Optimum Start 138Optimum Stop 138Output Control 128Output Devices 128PParallel Fan ATU 404Peer Communications Protocol 188Phone Lines 188PI 7PI control 23PID 7PID control 25Pilot Bleed System 62Pilot-operated valve 431Piping ArrangementsHot Water 359Piping SystemsCoupled Vs Decoupled 347Direct Vs Reverse Return 346Pitot tube sensors 277PneumaticCentralization 89Control CombinationsChangeover Control 87Electric-Pneumatic Relay Control 87Limit Control 85<strong>Manual</strong> Switch Control 86Pneumatic Recycling Control 88Pneumatic-Electric Relay Control 88Reset Control 87Sequence Control 85Control System 61, 90Controller 72Potentiometer 81Recycling Control 88Sensor 73Switch 83Pneumatic control 6Pneumatic Control Fundamentals 37Pneumatic-Electric Relay 82, 88Positive (Direct) Reset 121Positive displacement compressor 295Positive-Positioning Relay 80Power SupplyElectronic 129Preheat control processes 228Pressure Controller 71Pressure Conversion Multipliers 466Pressure drop 430critical 430Pressure IndependentConstant Volume ATUDual Duct 407VAV ATUDual Duct 406Pressure Reducing StationsDistrict Heating 383Pressure Reducing Valve Station 68, 369Pressure Reducing Valves 69Pressure SensorElectronic 127Pressure sensors 277Pressure-Dependent ATU 399Pressure-Independent ATU 399Primary Network 381Process 6ProcessorManagement-Level 184Operations-Level 184ProgrammingConfiguration 138Custom Control 138Data File 138System Initialization 138Sensing element 33Properties of Saturated Steam Data 476Proportional Band 6, 22, 60, 121Proportional Control 6, 21, 121Proportional-Integral 121Proportional-integral (PI) control 7, 23Proportional-Integral Controller 72Proportional-integral-derivative (PID) control 7, 25Propylene Glycol Solutions 438Psi to kPa Conversion 466Psychrometric AspectsAir Conditioning Process 43Air Washer 49Cooling and Dehumidification 51Air Washer 51Cooling Process 44Dehumidification and Reheat 52Heating Process 43Humidifying Process 44Mixed Air 42Steam Jet Humidifier 46Vaporizing Humidifier 50Psychrometric Chart Fundamentals 37Psychrometric Charts 39ASHRAE 53Psychrometric Processes 40Pulse Width Modulation 128PumpAffinity Laws 339Efficiency 338Performance 337Performance Curves 338Power Requirements 338Pump ControlVariable Speed 353Decoupled 358Minimum Flow 357Pump Speed Valve Position Load Reset 355ENGINEERING MANUAL OF AUTOMATIC CONTROL 491

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