Trane RT-PRC010-EN manual Percent Exhaust System, Barometric Relief Dampers

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Application Considerations

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100 Percent Exhaust System

Competitive rooftops use a return air fan system for controlling the amount of exhaust air during economizer operation.The return fan is in series with the supply fan and must operate whenever the supply fan is operating. During economizer operation, the economizer outdoor air dampers control the position of the return and exhaust air dampers, to exhaust the proper amount of air.The disadvantage of a return air fan is that it runs continuously, versus an exhaust fan system which runs only when needed to lower or maintain building static pressure. Also, the return fan must discharge air in two directions, through the return air dampers and/or exhaust air dampers, resulting in less efficient operation compared to an exhaust fan.

The IntelliPak® Rooftop unit offers modulating 100 percent exhaust system. This fan system has performance capabilities equal to the supply fan.The FC exhaust fans are started by the

economizer’s outdoor air damper position and the exhaust dampers track the economizer outdoor air damper position.The amount of air exhausted by this fan is controlled by modulating discharge dampers at the fan outlet.The discharge damper position is controlled by a signal that varies with the position of the economizer dampers. When the exhaust fans start, the modulating discharge dampers are fully closed, and exhaust airflow is 15 to 20 percent of total exhaust capabilities.

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50 Percent Exhaust System

The 50 percent exhaust system is a single FC exhaust fan with half the air- moving capabilities of the supply fan system.The experience ofTheTrane Company is that a non-modulating exhaust system selected for 40 to 50 percent of nominal supply CFM can be applied successfully.

The 50 percent exhaust system generally should not be selected for more than 40 to 50 percent of design supply airflow. Since it is an on/off nonmodulating

system, it does not vary exhaust CFM with the amount of outside air entering the building.Therefore, if selected for more than 40 to 50 percent of supply airflow, the building may become under-

pressurized when economizer operation is allowing lesser amounts of outdoor air into the building. If, however, building pressure is not of a critical nature, the non-modulating exhaust system may be sized for more than 50 percent of design supply airflow.

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Barometric Relief Dampers

Barometric relief dampers consist of gravity dampers which open with increased building pressure. As the building pressure increases, the pressure in the unit return section also increases, opening the dampers and relieving air. Barometric relief may be used to provide relief for single story buildings with no return ductwork and exhaust requirements less than 25 percent.

Figure AC-1 — PlanView of Modulating 100 Percent Exhaust System

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RT-PRC010-EN

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Contents 20 75Tons 90 130Tons Introduction American Standard IncContents Optional Features Features and BenefitsStandard Features Field Installed AccessoriesEasy to Service Features SummaryInstallation Ease ReliabilitySimplifyingThe Comfort System Integrated Comfort System ICSTracer control points for IntelliPak Rooftops FansWith Inlet GuideVanes Features and Benefits Optimum Building Comfort ControlVariable Frequency Drives VFD Simple Design with 70% Fewer Parts Proven DesignThroughTesting and ResearchTrane 3-DScroll Compressor LowTorqueVariationApplication Considerations Percent Exhaust System Barometric Relief Dampers20 75 tons SXHF, SFHF, SLHF, SSHF, Panel C DimensionsHorizontal Discharge SXHF, SFHF, SLHF, Sshf UnitsTable AC-5 SXHG, SLHG, Sshg Z Dimensions Table AC-4 SXHG, SLHG, Sshg Panel a and B Dimensions2508 17.4 Ventilation Override Sequences High Capacity Evaporator CoilCorrosive Atmospheres Natural Gas Heating ConsiderationsAcoustical Considerations Clearance RequirementsFigure AC-4 Unit Placement Duct DesignSelection Procedure Gas Heating System Natural Gas DetermineTotalWinter Heating LoadElectric Heating System HotWater HeatingExhaust Fan Motor Sizing Supply Fan Motor SizingAltitude Corrections Selection Procedure Model Number Description H F C1 1 567 20Ton 25Ton 30Ton 40Ton General DataTable GD-1- General Data 20-40Tons RPMFilters Table GD-2 General Data 50-75Tons 50Ton 55Ton 60Ton 70Ton 75Ton Low Ambient Option Min. Outside AirTemp90Ton 105Ton 115Ton 130Ton Table GD-3 General Data 90-130Tons50% 100% Number/Size/Type 22/FC Table GD-5 ARI Correction Multipliers Table GD-4 ARI Performance DataEER Iplv Performance Adjustment Factors Table PAF-1 Enthalpy of Saturated AIRPerformance 20Ton Data Performance 25Ton Data Performance 30Ton Data 561 207 451 399 493 302 537 199 429 389 468 292 Performance 40Ton Data345 452 265 496 183 431 551Performance 50Ton Data Performance 55Ton Data Performance 60Ton Data Performance 70Ton Data AmbientTemperature FFlow Performance 75Ton Data Performance 90Ton Data Performance 105Ton Data Performance 115, 130TonsTable PD-25- Natural Gas Heating Capacities Performance DataTable PD-24 Natural Gas Heating Capacities Table PD-26 Steam Heating Capacities Q/ITD1Table PD-29- 90To 130-Ton Electric Heat AirTemperature Rise Table PD-28 20 to 75-Tons Electric Heat AirTemperature RiseTable PD-30- Electric Heat KW Ranges Table PD-31- HotWater Heating Capacities Q/ITD1 20, 25Tons RPM BHPPressure 1364 4000 10371225 1271 140910 HP 1200 RPM 80% 1100 RPM 6000 883 927 968 1007 1043 1078 22.221400 RPM Wocfm 40% 1300 RPM 25 HP Inches 1200 RPM 50% 20 HP 6000 890 933 974 1012 1049 Table PD-35 Supply Fan PerformanceWITH Inletvanes 30Ton1357 20.45 15 HP 1200 RPM Fan Curve Limits Dual 18 X 18 Fans Wocfm Entrance LossesIthout Exhaust 1000 RPM 10 HP30.47 40, 50, 55Tons32.36 40, 50, 55Tons 800 14.86 820 1161 32.63 Cfm Total Static Pressure Std 250 500 750 000Inches w.c 60, 70, 75Tons 43.8560, 70, 75Tons 14000 729 800 RPM 20 HP 70% 15 HP 30000 708 749 787 826 10.13 861 27000 646 690 732 773 808 840 10.71 872904 13.34 28000 667 710 750 791 826 10.15 857 897 12.88 928 14.40 957 15.80 9851469 49.80 1491 27000 1363 39.85 1388 41.68 1414 43.54 1437 45.26 146129000 1375 42.04 1398 43.93 1423 45.91 1445 1515 53.66 30000 1382 43.16 1406 45.18 1428891 12.90 922 14.26 952 15.65 29000 741 778 812 845 27000 695 734 770 805 840904 13.44 935 14.77 28000 718 756 791 825 10.28 858 897 13.19 928 14.59 958 16.05 9871496 55.23 1518 57.33 1541 59.53 1565 157932000 1442 49.55 1464 37000 1494Performance 105,115,130Tons 1100 1623 76.74 1640 78.9500 R 1500 100 900 RP32.56 1233 34.40 1255 36.26 1277 38.17 46000 1138 26.67 25.3526.95 30.40 1216 32.05 1240 33.79 1086 23.371625 76.92 1643 79.30 46000 1624 1641 79.40Table PD-44 Component Static Pressure Drops in.W.G Performance 20 -75Tons DataSFHF/G SEHF/G SLHF/G SSHF/G SFHF/G Performance 90-130Tons DataTable PD-45 Component Static Pressure Drops in.W.G SLHF/G SSHF/GTable PD-46 20-75 -Tons Supply Air Fan Drive Selections Table PD-47 90-130 -Tons Supply Air Fan Drive Selections835 39.71 859 BHP RPM885 44.08 910 46.33 934 48.32 Table PD-50 20-75Tons 100% Exhaust Fan Drive Selections Table PD-51 90-130Tons -100% Exhaust Fan Drive SelectionsTable PD-53 90-130 Tons 50% Exhaust Fan Performance Table PD-52 20-75Tons 50% Exhaust Fan Performance18.97 835 19.86 859 20.87 885 22.05 910 23.18 934 24.17 Table PD-54- 50% Exhaust Fan Drive Selections VAV Units ControlsVAV Units Only Reset based on zone temperature Supply Air Setpoint ResetReset based on outdoor air temperature ZoneTemperature Control Unoccupied Zone Heating and CoolingCV Units Only CV UnitsHeating Gas Heating -Two-Stage Electric Heating Unoccupied ZoneTemperature Control Cooling and HeatingGas Heating Modulating Gas HotWater or Steam HeatingVAV/CV Units Purge with duct pressure control E Exhaust sequence CPurge sequence D Human Interface Panel H.IGeneric Building Automation System odule Gbas Human Interface Panel Main MenuEvaporator Coil Frost Protection Night Setback Sensors Occupied/Unoccupied SwitchingDry BulbTemperature Control of Economizer Occupied/Unoccupied input on the RTMElectrical Data Electrical Service SizingDual Source Power units 200V Set 2. Rooftop units with Electric HeatRLA1 LRA 178 21.8 14348.5 39.0 Table ED-6 -Voltage Utilization Range48.5 39.0 Motor Hp FLADimensional 20 75Tons Figure DD-1 20-75Ton Cooling Only Unit Dimensions Sahf Detail B Covers 40, 60, 70 and 75 TON Units20 & 25 5-8 15/ 16 24-1 3 5/ 8 1-7 9 Sahf 10’-1 7 ’-10 15/ 16 2’-0 ’-6Dimensional 90 130Tons Figure DD-5 90 130Tons Service ClearanceFigure DD-6 90 130Ton Roof Curb Dimensions Section B-B RT-PRC010-ENDimensional Field Installed SensorsConstant CV and VAV Integrated Comfort System SensorsSL/SS WeightsTableW-1 -Approximate OperatingWeights Lbs./Kg 14740 15380 15930 16080Options OptionsAgency Approval Ambient ControlMiscellaneous Options Electronic Zone Sensors Roof CurbMechanical Specifications GeneralControls Supply Fan 20 75Ton Units90 130Ton Units Unit ControllerPercent bag filter option Permanent cleanable wire mesh optionHigh efficiency throwaway option Percent cartridge filter optionPercent modulating economizer option Outside Air GeneralManual outside air option Ultra low-leak economizer dampers optionAccessories Heating SystemFile Number PL-RT-S*HF/S*HG-20-130TONS-PRC0010-EN-10-2001 Literature Order NumberSupersedes RT-DS-8 05/98 Stocking Location Inland-LaCrosse

RT-PRC010-EN specifications

The Trane RT-PRC010-EN is a prominent model in the line of Trane's packaged rooftop units, designed to offer efficient heating, cooling, and ventilation for commercial applications. Renowned for its robust performance, this unit integrates advanced technologies and superior engineering to meet diverse environmental needs while ensuring energy efficiency and reliability.

One of the key features of the RT-PRC010-EN is its energy-efficient operation. The unit is equipped with variable-speed fans and scroll compressors, which allow for precise control over temperature and airflow. This adaptability not only enhances comfort but also contributes to significant energy savings. The inclusion of high-efficiency cooling coils further optimizes performance, making it an excellent choice for businesses looking to lower their operational costs.

The RT-PRC010-EN model integrates smart controls that allow for seamless integration into building management systems. These controls facilitate real-time monitoring and diagnostics, enabling facility managers to maintain optimum operational efficiency and promptly address any maintenance needs. This technology minimizes downtime and extends the lifecycle of the unit.

Moreover, the unit’s construction is targeted toward resilience and durability. Built with a corrosion-resistant cabinet and extensive insulation, the RT-PRC010-EN can withstand the rigors of various climates, making it suitable for installation across different geographical locations. Its compact design allows for easy installation on rooftops, maximizing space utilization in commercial buildings.

Another standout characteristic is the unit's versatility in application. The RT-PRC010-EN can be tailored to suit a wide range of commercial settings, including retail establishments, educational institutions, and healthcare facilities. Options for various indoor and outdoor configurations enhance its adaptability to specific operational requirements.

In conclusion, the Trane RT-PRC010-EN stands out as an energy-efficient, reliable, and versatile solution for commercial heating and cooling needs. Its advanced features, smart controls, and robust design make it an ideal choice for businesses looking to enhance comfort while minimizing energy expenditures and ensuring operational reliability. Whether dealing with extreme weather conditions or managing indoor air quality concerns, this rooftop unit provides a comprehensive solution tailored to modern commercial requirements.
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