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York HFC-410A manual Acoustical Considerations

Models: HFC-410A

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FORM 100.50-EG5 (108)

In the non-modulating exhaust system, the exhaust air- ﬂow is constant whenever the exhaust fan is operating. This type of control should only be used to either assist a smoke purge system or when a system requires a constant volume of exhaust airﬂow.

ACOUSTICAL CONSIDERATIONS

The Eco2 unit is designed for lower sound levels than competitive units by using ﬂexible fan connections, fan spring isolators, double-wall construction, multiple fan options, and lower speed and horsepower fans. For VAV applications, VFDs are used instead of inlet guide

vanes. Additional sound attenuation can be obtained using compressor sound blankets and ﬁeld-supplied sound attenuators when necessary.

Even with these equipment design features, the acousti- cal characteristics of the entire installation must never be overlooked. Additional steps for the acoustical character- istics of a rooftop installation should be addressed during the design phase of a project to avoid costly alterations after the installation of the equipment. During the design phase of a project, the designing engineer should con- sider, at a minimum, the impact of the equipment location, rooftop installation, building structure, and duct work.

JOHNSON CONTROLS

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York HFC-410A manual Acoustical Considerations

Contents

MEA 231-02-E Simplicity Elite with HFC-410arefrigerant50 THROUGH 65 TONS ASHRAE 90.1 COMPLIANTLower total cost of ownership IntroductionBetter Economy Better EcologyTable of Contents POWER OPTIONS Features and BeneﬁtsAIRFLOW CONFIGURATIONS COOLING AND HEATING CONFIGURATIONSRELIEF SYSTEM COMMUNICATIONSFILTER OPTIONS OUTSIDE AIR DAMPER OPTIONSEVAPORATOR SECTION Features and Beneﬁts continuedCONDENSER FEATURES AND OPTIONS CABINET FEATURES AND OPTIONSACCESSORIES LOCATION UNIT PLACEMENTApplication Data GENERALECONOMIZER DUCT CONSIDERATIONSUNIT ORIENTATION HORIZONTAL APPLICATIONSBUILDING PRESSURE CONTROL SYSTEMS Application Data continuedVAV SUPPLY AIR PRESSURE CONTROL Copper-FinEvaporator and Condenser CoilACOUSTICAL CONSIDERATIONS JOHNSON CONTROLS This page intentionally left blankFORM 100.50-EG5108 Nomenclature TABLE 3 - PHYSICAL DATA Physical DataMODEL Model Physical DataAltitude and Temperature Corrections JOHNSON CONTROLS FIG. 2. ALTITUDE/TEMPERATURE CONVERSION FACTORFORM 100.50-EG5108 Cooling Performance Data - 050 Model Cooling Performance Data - 051 Model Cooling Performance Data - 060 Model Cooling Performance Data - 061 Model Supply Fan Data Evap Coil 50 Ton Component Static Pressure DropsPower Exhaust ComponentEXHAUST FAN MOTOR SIZING INSTRUCTIONS Exhaust Fan DataLoad Deﬁnitions ELECTRICAL SERVICE SIZINGElectrical Data High Efﬁciency MORNING WARM-UP UNOCCUPIED / OCCUPIED SWITCHINGControls GAS HEATING OPERATIONDual-EnthalpyEconomizer ECONOMIZER OPERATIONDry-BulbEconomizer Single-EnthalpyEconomizerSUPPLY FAN OPERATION Powered, Variable-Volume Exhaust-VFDControlledSMOKE PURGE SEQUENCE LOW-AMBIENT/HEAD-PRESSURECONTROL OPERATIONHEATING OPERATION Thermostat Control AIRFLOW General Arrangement3 - GENERAL ARRANGEMENT DRAWING DrawingsAIRFLOW SIDE SUPPLY / REAR RETURNDRAWING AIRFLOW DrawingsGeneral Arrangement RETURN CURB LAYOUT DRAWINGFIG. 6 - GENERAL ARRANGEMENT DRAWING SUPPLYCenter of Gravity BC Condenser Coil End AD Unit WeightsModel Delivery and Handling Guide SpeciﬁcationsGENERAL Scope Quality AssuranceEconomizer Section WarrantiesEQUIPMENT Product Speciﬁcation Unit ConstructionEvaporator Section Guide Speciﬁcations continuedFilter Section Condenser Section Supply Fan SectionDischarge Plenum Guide Speciﬁcations continued Controls Simplicity EliteINSPECTION AND START-UPSUPERVISION EXECUTION InstallationALL RIGHTS RESERVED P.O. Box 1592, York, Pennsylvania USATele Copyright by Johnson Controls