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37HS
ModulineT Air Terminals
Application Data
Page
CONTENTS
• VAV HEATINGAND COOLING WITH
Page
SYSTEM-POWERED CHANGEOVER
INTRODUCTION ........................... 1-2
• VAV HEATING
System-Powered Controls With
BUILDING LOAD CALCULATION .......... 2-23
Electric Interface ......................... 64
Cooling ................................... 2
• VAV COOLING WITH ELECTRIC WARM-UP
• LOAD CONSIDERATIONS
• VAV HEATINGAND COOLING WITH
• DESIGN PROCEDURE
ELECTRIC CHANGEOVER
Heating ....................
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ceilingdesignsandbuildingcontrolsystems.Modulinetter- characteristics, control system options and air distribution minalsinstalledinmodularceilingscanbemovedeasilywhen characteristics.Thisbookcoversbothsystem-poweredcon- tenantrequirementschange,andthequiet,linearslotdistri- trol and system-powered with electric or pneumatic inter- butionintegrateswellinmostcommercialceilings.Figure2 facecontrols.ApplicationinformationforCarrier’selectronic showsa37HSModulineunitwithvariableairvolume(VAV) Produc
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Oversizing— Oversizing of variable volume systems re- sults in unused equipment capacity and worse performance atpartload,notinincreasedsystemairflow.Theactualsys- temoperationwillreflecttheactualsystemload,notthede- sign load. If conservative data, safety factors, or provision for future loads are included in the design estimate, the ac- tualsystemairflowwillnotbeincreased.Theequipmentwill be capable of handling an increased load should it ever ex- ist, but will automatically throttle back to hand
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1. UsingtheE20-IIBlockLoadProgram,selectCincinnati Supply Air Temperature— In systems using draw-thru air foritsweatherdata.TheWEATHERPARAMETERSprint- handlingunitsandhighinductionCarrierModulinettermi- outshownonpages5and6showstheweatherdataused nalunits,theacceptablerangeofsupplyairtemperaturesat for the load estimating calculations. theterminalsisfrom50to54F.ThecoolingcoilADP(Ap- paratus Dew Point) will be from 3 to 5° F lower than the 2. Thenextstepistogatherdataonthebuilding,including suppl
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Modulinet Selection (Analysis of Data)— The printout shown below presents an analysis of the preceding data. SeparateDuctHeating—Asimpletypeofoverheadairheat- Heating— Heatmustbeprovidedinabuildingtooffset ingsystemforusewithaModulinecoolingsystemconsists losses through the perimeter walls, windows, and roof. In ofaseriesofceilingoutlets,placedaroundtheperimeterof theinteriorspacestheheatgainfromlightsandpeoplewill thebuildingclosetotheoutsidewall,whichblowwarmair in many cases be enough to caus
