Engineering Manual o.. - HVAC.Amickracing

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AIR HANDLING SYSTEM CONTROL APPLICATIONSVALVE AND DAMPER SELECTIONPneumatic valve and damper actuators are shown in these examples. If actuators are electric, certain ones need not be springreturn unless a specific reason exists. Table 1 outlines general actuator selection. The table indicates actuator positioning desiredon system shutdown and loss of motive force.Table 1. Valve and Damper Actuator Selection Guide.Pneumatic ActuatorsElectric ActuatorsActuator ApplicationSystemShutdown Loss of AirSystemShutdownLoss ofElectricityDampersOutdoor air Closes Closes Closes ClosesRelief air (to outdoor)Return air Opens Opens Opens Opens 1VAV fan inlet vanes Closes Closes Closes Stays sameVAV boxOpensMultizone hot deck, cold areas Opens OpensMultizone hot deck, hot areas Closes Closes ClosesValvesAHU chilled water Closes Opens Closes Stays sameTerminal reheatPreheat in OA below 35F Opens 2 Opens 2 OpensPreheat in OA above 35F Closes ClosesOther hot water Closes 2 Closes 2 Stays sameAHU steam heating Closes ClosesSteam humidifier Closes Closes1 Return air dampers need no springs if the associated fan is delayed upon start-up to allow the RA damper to properlyposition to assure that the fan does not start with both RA and OA dampers closed.2 If a duct temperature sensor is located near a hot water or steam coil, leaving the coil under control (with a setpoint of80°F to 100°F) during equipment shutdown can provide added freeze alarm protection. If variable flow hot waterpumping is provided and a duct low temperature control senses freezing conditions, hot water valves may bepositioned approximately 25% open if a temperature sensor is not available.ENGINEERING MANUAL OF AUTOMATIC CONTROL190
AIR HANDLING SYSTEM CONTROL APPLICATIONSSYMBOLSThe following symbols are used in the system schematics following. These symbols denote the nature of the device, such as athermometer for temperature sensing.CONTROLLER, TEMPERATUREFANSENSOR, TEMPERATURELOW LIMITHIGH LIMITPRESSURE CONTROLLER,HIGH LIMIT CUT-OUT,MANUAL RESETMANUAL RESET NOTATION56INSERTION TEMPERATURE SENSOR1.8PRESSURE SENSOR56TEMPERATURE SENSOR,AVERAGINGCOOLING COILNORMALTEMPERATURE CONTROLLER,MANUAL RESET, SAFETY LOW LIMITHEATING COILAUTOMANUAL MULTI-STATECOMMAND (ON-OFF-AUTO)ONSTATUS POINTFILTER63VALUE POINT (% LOAD)74COMMANDABLE VALUEPUMP3-WAY VALVE WITH ACTUATORSOLENOID VALVE2-WAY VALVE WITH ACTUATORSMOKE DETECTOR(NFPA SYMBOL)DAMPER WITH ACTUATORPROPELLER EXHAUST FANM10437ENGINEERING MANUAL OF AUTOMATIC CONTROL191
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ENGINEERING MANUAL ofAUTOMATICCONTR
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Copyright 1934, 1940, 1953, 1988, 1
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PREFACEThe purpose of this manual i
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CONTROL FUNDAMENTALSElectronic Cont
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CONTROL FUNDAMENTALSDeviation—The
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CONTROL FUNDAMENTALSHVAC SYSTEM CHA
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CONTROL FUNDAMENTALSInfiltration is
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CONTROL FUNDAMENTALSROTATINGGRANULA
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CONTROL FUNDAMENTALS-PATHOFIONSAIRF
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CONTROL FUNDAMENTALSOPENFINALCONTRO
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CONTROL FUNDAMENTALSTIME PROPORTION
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CONTROL FUNDAMENTALSON“CLOSE”SW
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CONTROL FUNDAMENTALSOUTDOOR AIRTEMP
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CONTROL FUNDAMENTALSPROPORTIONAL-IN
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CONTROL FUNDAMENTALSCONTROLLERVALVE
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CONTROL FUNDAMENTALSIn terms of hea
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CONTROL FUNDAMENTALSFLAPPERSPRINGSI
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CONTROL FUNDAMENTALSimpact of the j
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CONTROL FUNDAMENTALSCHARACTERISTICS
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PSYCHROMETRIC CHART FUNDAMENTALSWAT
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PSYCHROMETRIC CHART FUNDAMENTALShea
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PSYCHROMETRIC CHART FUNDAMENTALS19.
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PSYCHROMETRIC CHART FUNDAMENTALS0°
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PSYCHROMETRIC CHART FUNDAMENTALSREF
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PSYCHROMETRIC CHART FUNDAMENTALSThi
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PSYCHROMETRIC CHART FUNDAMENTALSCOO
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PSYCHROMETRIC CHART FUNDAMENTALS90
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PSYCHROMETRIC CHART FUNDAMENTALSFig
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PNEUMATIC CONTROL FUNDAMENTALSMain
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PNEUMATIC CONTROL FUNDAMENTALSFrom
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PNEUMATIC CONTROL FUNDAMENTALSA tem
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PNEUMATIC CONTROL FUNDAMENTALSSome
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PNEUMATIC CONTROL FUNDAMENTALSPRESS
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PNEUMATIC CONTROL FUNDAMENTALSnozzl
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PNEUMATIC CONTROL FUNDAMENTALSSENSO
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PNEUMATIC CONTROL FUNDAMENTALSFigur
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PNEUMATIC CONTROL FUNDAMENTALSBRANC
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PNEUMATIC CONTROL FUNDAMENTALSMROOM
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PNEUMATIC CONTROL FUNDAMENTALSCAPAC
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PNEUMATIC CONTROL FUNDAMENTALSHESIT
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PNEUMATIC CONTROL FUNDAMENTALSM13MD
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PNEUMATIC CONTROL FUNDAMENTALSLow-l
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PNEUMATIC CONTROL FUNDAMENTALSPNEUM
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PNEUMATIC CONTROL FUNDAMENTALSPNEUM
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PNEUMATIC CONTROL FUNDAMENTALSSUPPL
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PNEUMATIC CONTROL FUNDAMENTALSDISCH
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ELECTRIC CONTROL FUNDAMENTALSLOW-VO
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ELECTRIC CONTROL FUNDAMENTALSSERIES
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ELECTRIC CONTROL FUNDAMENTALSLOW-LI
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ELECTRIC CONTROL FUNDAMENTALSCONTRO
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ELECTRIC CONTROL FUNDAMENTALSSERIES
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ELECTRIC CONTROL FUNDAMENTALSOPERAT
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ELECTRIC CONTROL FUNDAMENTALSBRIDGE
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ELECTRIC CONTROL FUNDAMENTALSTWO-PO
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ELECTRIC CONTROL FUNDAMENTALSA 135-
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ELECTRIC CONTROL FUNDAMENTALSMOMENT
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ELECTRONIC CONTROL FUNDAMENTALSINTR
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ELECTRONIC CONTROL FUNDAMENTALSTYPI
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ELECTRONIC CONTROL FUNDAMENTALSAnot
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ELECTRONIC CONTROL FUNDAMENTALSWIRE
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ELECTRONIC CONTROL FUNDAMENTALSTemp
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ELECTRONIC CONTROL FUNDAMENTALSTYPI
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MICROPROCESSOR-BASED/DDC FUNDAMENTA
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Page 140 and 141: INDOOR AIR QUALITY FUNDAMENTALSINTR
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AIR HANDLING SYSTEM CONTROL APPLICA
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BUILDING AIRFLOW SYSTEM CONTROL APP
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CHILLER, BOILER, AND DISTRIBUTION S
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INDIVIDUAL ROOM CONTROL APPLICATION
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VALVE SELECTION AND SIZINGVALVE SEL
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LINE PRESSURE IN PSIVALVE SELECTION
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VALVE SELECTION AND SIZINGVALVE MAT
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VALVE SELECTION AND SIZINGWhen butt
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VALVE SELECTION AND SIZING— Graph
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VALVE SELECTION AND SIZINGPRESSURE
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VALVE SELECTION AND SIZING3640.443.
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VALVE SELECTION AND SIZINGQUANTITY
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VALVE SELECTION AND SIZINGThe criti
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VALVE SELECTION AND SIZINGTable 5.
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DAMPER SELECTION AND SIZINGDAMPER S
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DAMPER SELECTION AND SIZINGIn a low
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DAMPER SELECTION AND SIZINGFor typi
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DAMPER SELECTION AND SIZINGTORQUE R
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DAMPER SELECTION AND SIZINGwhen eit
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DAMPER SELECTION AND SIZINGStabilit
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DAMPER SELECTION AND SIZINGTable 4.
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DAMPER SELECTION AND SIZINGDAMPER P
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DAMPER SELECTION AND SIZINGLOUVERSO
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GENERAL ENGINEERING DATAHEATING DAT
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GENERAL ENGINEERING DATACONVERSION
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GENERAL ENGINEERING DATAVOLUMEExist
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GENERAL ENGINEERING DATAHEAT TRANSF
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GENERAL ENGINEERING DATAFORCEEXAMPL
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GENERAL ENGINEERING DATATHREE-PHASE
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GENERAL ENGINEERING DATACONDUIT SIZ
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GENERAL ENGINEERING DATAVOLTAGE CON
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GENERAL ENGINEERING DATAAIRFLOW DAT
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GENERAL ENGINEERING DATAMOISTURE CO
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GENERAL ENGINEERING DATAENGINEERING
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GENERAL ENGINEERING DATAASHRAEGuide
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GENERAL ENGINEERING DATACooling Tow
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GENERAL ENGINEERING DATAFlame Safeg
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GENERAL ENGINEERING DATAOperationSe
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GENERAL ENGINEERING DATASeries 40Co
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GENERAL ENGINEERING DATAValve Contr
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