York HFC-410A manual Acoustical Considerations

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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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Contents 231-02-E Ashrae90.1 Compliant MEASimplicity Elite controller Option Indoor air quality features for the indoor environ- mentIntroduction Lower total cost of ownershipTable of Contents Features and Beneﬁts Relief System CommunicationsFilter Options Outside AIR Damper OptionsRoof Curbs Condenser Features and OptionsCabinet Features and Options Evaporator SectionAccessories Location Unit PlacementApplication Data GeneralEconomizer Duct ConsiderationsUnit Orientation Horizontal ApplicationsBuilding Pressure Control Systems VAV Supply AIR Pressure ControlHarsh Environments Condenser and Evaporator Coil Protection Copper-Fin Evaporator and Condenser CoilAcoustical Considerations This page intentionally left blank York NomenclaturePhysical Data Physical DataLow Ambient Option Min. OA Temp Minimum Airﬂow Heating Model050 051 060 061 Gas Furnaces Minimum OA Temp for Mech. CigModel Supply Blower Cooling Only Gas Heat Type ModelIplv Ieer EERAir Altitude feet Temp Altitude and Temperature CorrectionsALTITUDE/TEMPERATURE Conversion Factor Cooling Performance DATA* 50 TON Standard Capacity Cooling Performance Data 050 ModelCooling Performance DATA* 55 TON High Capacity Cooling Performance Data 051 ModelCooling Performance DATA* 60 TON Standard Capacity Cooling Performance Data 060 ModelCooling Performance DATA* 65 TON High Capacity Cooling Performance Data 061 ModelCFM STD. AIR BHP RPM Supply Fan DataTotal Static Pressure inches of water column CFM Component Static Pressure DropsAIR BHP RPM Exhaust Fan DataExhaust FAN Motor Sizing Instructions CFM STDRLA LRA Electrical Service SizingElectrical Data Load DeﬁnitionsAmps FLAUnit Size Quantity FansMorning WARM-UP Unoccupied / Occupied SwitchingControls GAS Heating OperationExhaust Control Sequences Economizer OperationVentilation Control Sequences Cooling Operation Smoke Purge SequenceLOW-AMBIENT/HEAD-PRESSURE Control Operation Supply FAN OperationSupply Single-Point POWER-SUPPLY-CONDUCTOR Size RangeHeating Operation Dual-Point TBGeneral Arrangement Drawing General ArrangementSide Supply / Rear Return DrawingTOP View DrawingsGeneral Arrangement Drawing Curb Layout DrawingUnit Weights Unit Corner Weights Guide Speciﬁcations Unit Construction WarrantiesEquipment Product SpeciﬁcationEvaporator Section Filter SectionCondenser Section Supply Fan SectionDischarge Plenum Controls Simplicity Elite Inspection and START-UP Supervision InstallationExecution ALL Rights Reserved