Manuals / Trane / Household Appliance / Air Conditioner

Trane TRG-TRC013-EN manual 99999999999999999999999999999

Models: TRG-TRC013-EN

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	Fan – System Interaction 999999999999999999999999999999999999999 CS
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	Forward Curved (FC) Fans 9999999999999999999999999999999999999 DR
	Backward Inclined (BI) Fans 99999999999999999999999999999999999 EB
	Airfoil (AF) Fans 99999999999999999999999999999999999999999999999999999 EE
	Vaneaxial Fans 999999999999999999999999999999999999999999999999999999 EI
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	“Riding the Fan Curve” 99999999999999999999999999999999999999999 FB
	Discharge Dampers 99999999999999999999999999999999999999999999999 FF
	Inlet Vanes 999999999999999999999999999999999999999999999999999999999999 FN
	Fan-Speed Control 9999999999999999999999999999999999999999999999999 FR
	Variable-Pitch Blade Control 99999999999999999999999999999999999 FS
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	System Static-Pressure Control 99999999999999999999999999999 IE
	System Effect 9999999999999999999999999999999999999999999999999999999 II
	Acoustics 99999999999999999999999999999999999999999999999999999999999999 IN
	Effect of Actual (Nonstandard) Conditions 99999999999999 IR
	Equipment Certification Standards 9999999999999999999999999 IS
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Trane TRG-TRC013-EN manual 99999999999999999999999999999

Contents

Page THE TRANE COMPANY Attn Applications Engineering BUSINESS REPLY MAILBUSINESS REPLY MAIL 3600 Pammel Creek Road La Crosse WIAir Conditioning Fans Comment CardResponse Card One of the Equipment Seriesp e The Trane Company Worldwide Applied Systems GroupAir Conditioning Fans A Trane Air Conditioning Clinic99999999999999999999999999999 caQ3caM6793O Air Conditioning Fans axial centrifugalAir Conditioning Fans period oneMeasuring Pressure atmospheric ductpressure pressureR-2 x”rwt Positive Duct Pressurefwt” p 2 p ”tvp rp S” r“- 4 jK 7683-- r-“4lcwt are “water gage” wg and “water column” wcpressure Inclined Manometerduct reservoirTotal Pressure Velocity Pressure vs. Static Pressureg DC Velocity Pressure vs. Static PressureVelocity Pressure vs. Static Pressure damper fully openg DD Measuring Static PressureVelocity Pressure vs. Static Pressure g DEMeasuring Total Pressure Fan Performance Test g DGVelocity V = Constant ⋅ √ Pρ Determining Fan AirflowVelocity Pressure Pv = Pt - P s Airflow = Velocity ⋅ Fan Outlet Areastatic pressure Plotting Fan Performance PointsPlotting Fan Performance Points 2.0 in. H2Oairflow Fan Performance Curvestatic pressure airflowFan Speed Input Power Fan SurgeFan Surge Line Percent of Wide-OpenAirflowPp” -p” Tabular Performance Datafan’s speed and input power requirement g EGSystem Resistance System ResistanceAirflow System Resistance CurveStatic Pressure Static PressureFan - System Interaction System Resistance CurveFan - System Interaction Higher System Resistance Lower System ResistanceStatic Efficiency Power Out Static Efficiency SE = Power InSE = Constant ⋅ Input Power Airflow ⋅ Static Pressure1.65 m3/s ⋅ 491 Pa 3,500 cfm ⋅ 2.0 in. H2O= 55% ⋅ 1.5 kWresistance curve Constant-VolumeSystemdesign system pressureVariable-PitchVaneaxial Fan g FHvariable-pitch blades 85% 80% 70% total pressuresurge region airflowg FM total pressuresurge region anglAir Conditioning Fans period twoCentrifugal Fan g FNcwt ux r2 - PM2 up” PM up” r-” -t Forward Curved FanForward Curved Fan cwt r50 to 65% Forward Curved Fanstatic efficiency applicationBackward Inclined Fan backward inclined FC vs. BI Fansforward curved Backward Inclined FanBackward Inclined Fan cwt p“xrpbackward inclined Backward Curved FanAirfoil Fan backward curvedstatic efficiency Plug or Plenum FanAirfoil Fan 80 to 86%Vaneaxial Fan straightening vanes fan wheel or impellerg HF application Vaneaxial FanVariable-PitchVaneaxial Fan static efficiencyairflow surge regionpressure g HIBackward inclined BI or airfoil AF Fan SelectionForward curved FC VaneaxialAir Conditioning Fans period threeVAV System K 9e“5VAV System Riding the Fan Curve“Riding the Fan Curve” S” p eKeForward Curved Centrifugal Fan Fan Control Loop VAV System Modulation Curve Discharge dampers Inlet vanes Fan-speedcontrol Methods of Fan Capacity ControlDischarge Dampers Variable-pitchblade controlDischarge Dampers upward. The fan begins to “ride up” its constant-speedperformance curve toward f, from the design operating point e, trying to balance with this new system resistance curve. As a result, the fan delivers a lower airflow at a higher static pressureInlet Vanes Inlet VanesInlet Vanes upward. The fan begins to “ride up” its current vane position curve toward f, from the design operating point e, trying to balance with this new system resistance curve. As a result, the fan delivers a lower airflow at a higher static pressureFan-SpeedControl Fan-SpeedControlg MF Variable-PitchBlade Controlp“-”vKe variable-pitch bladescwt t e eK/ up”discharge Fan Control Comparisonpower design airflowperiod four Air Conditioning Fansg MI sensor System Static-PressureControlcontroller VAV supplyterminal units fanOptimized Static-PressureControl System Effect System EffectAcoustics Avoid rectangular sound traps, if possible Acoustical GuidelinesMinimize system effects Use adequate vibration isolation1 Air Density Ratio = Effect of Actual Conditions5 Poweractual = Air Density Ratio ⋅ Powerstandard DensityactualEquipment Certification Standards Purposeperiod five Review-PeriodOneAir Conditioning Fans axial centrifugal Review-PeriodTwoReview-PeriodThree “Riding the fan curve” Discharge dampersg NO Review-PeriodFourApplication considerations System static-pressurecontrol System effectcp”t Kx Page NLt -”trp” wp”s“t wxvwt PO up”4 DDList two possible causes of system effectE F 64 x”4 R8 j78 pl e F 82A98 u- j7 bndb Kx cbt L“riding the fan curve” K -tsx 9bw5 EOCF8P8EOI yvi8yveCDF8grgAc8hrf8yvi8yveCDF8DCPP8gr FLCC t e