Trane RT-PRC007-EN manual Acoustical Considerations, Clearance Requirements, Duct Design

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Application Considerations

Heat selections other than gas heat will not be affected by altitude. Nominal gas capacity (output) should be multiplied by the factors given inTable PD-3 before calculating the heating supply air temperature.

Acoustical Considerations

Proper placement of rooftops is critical to reducing transmitted sound levels to the building.The ideal time to make provisions to reduce sound transmissions is during the design phase. And the most economical means of avoiding an acoustical problem is to place the rooftop(s) away from acoustically critical areas. If possible, rooftops should not be located directly above areas such as: offices, conference rooms, executive office areas and classrooms. Instead, ideal locations might be over corridors, utility rooms, toilets or other areas where higher sound levels directly below the unit(s) are acceptable.

Several basic guidelines for unit placement should be followed to minimize sound transmission through the building structure:

1

Never cantilever the compressor end of the unit. A structural cross member must support this end of the unit.

2

Locate the unit’s center of gravity which is close to, or over, a column or main support beam.

3

If the roof structure is very light, roof joists must be replaced by a structural shape in the critical areas described above.

4

If several units are to be placed on one span, they should be staggered to reduce deflection over that span.

It is impossible to totally quantify the effect of building structure on sound transmission, since this depends on the response of the roof and building members to the sound and vibration of the unit components. However, the guidelines listed above are experience- proven guidelines which will help reduce sound transmissions.

Clearance Requirements

The recommended clearances identified with unit dimensions should be maintained to assure adequate serviceability, maximum capacity and peak operating efficiency. A reduction in unit clearance could result in condenser coil starvation or warm condenser air recirculation. If the clearances shown are not possible on a particular job, consider the following:

Do the clearances available allow for major service work such as changing compressors or coils?

Do the clearances available allow for proper outside air intake, exhaust air removal and condenser airflow?

If screening around the unit is being used, is there a possibility of air recirculation from the exhaust to the outside air intake or from condenser exhaust to condenser intake?

Actual clearances which appear inadequate should be reviewed with a localTrane sales engineer.

When two or more units are to be placed side by side, the distance between the units should be increased to 150 percent of the recommended single unit clearance.The units should also be staggered for two reasons:

1

To reduce span deflection if more than one unit is placed on a single span. Reducing deflection discourages sound transmission.

2

To assure proper diffusion of exhaust air before contact with the outside air intake of adjacent unit.

Duct Design

It is important to note that the rated capacities of the rooftop can be met only if the rooftop is properly installed in the field. A well designed duct system is essential in meeting these capacities.

The satisfactory distribution of air throughout the system requires that there be an unrestricted and uniform airflow from the rooftop discharge duct. This discharge section should be straight for at least several duct diameters to allow the conversion of fan energy from velocity pressure to static pressure.

However, when job conditions dictate elbows be installed near the rooftop outlet, the loss of capacity and static pressure may be reduced through the use of guide vanes and proper direction of the bend in the elbow.The high velocity side of the rooftop outlet should be directed at the outside radius of the elbow rather than the inside.

RT-PRC007-EN

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Contents Packaged Rooftop Air Conditioners American Standard Inc IntroductionContents Optional Features Features and BenefitsStandard Features LowTorque Variation Proven DesignThroughTesting and ResearchTrane 3-DScroll Compressor Simple Design with 70% Fewer PartsMicro Features BenefitsQuality and Reliability Micro ControlsFC Fans with Inlet GuideVanes RigorousTestingEase of Installation Single Point PowerValue Easy to ServiceVariTrac Altitude Corrections Application Recommendations Power Exhaust FanExhaust Air Options Barometric Relief DampersDuct Design Acoustical ConsiderationsClearance Requirements Supply Air Fan Selection ProcedureUnit Electrical Requirements Air Delivery ProcedureElectric Heating System Natural Gas Heating SystemModel Number Description Table GD-1 General Data 27 1/2 30 Tons General DataTable GD-2- General Data 35-40Ton Table GD-3- General Data 50Ton Table PD-3 Gas Heating Capacity Altitude Correction Factors Performance Adjustment FactorsTable PD-1- Enthalpy of Saturated AIR Table PD-5- 30Ton Gross Cooling Capacities Mbh Performance DataTable PD-4 27 1/2 Ton Gross Cooling Capacities MBh Table PD-7 40Ton Gross Cooling Capacities Mbh Table PD-6 35Ton Gross Cooling Capacities MbhTable PD-8 50Ton Gross Cooling Capacities MBh Table PD-11 Natural Gas Heating Capacities Table PD-9 Electric Heat AirTemperature RiseTable PD-10 Available Electric Heat KW Ranges Static Pressure in. wg1 Table PD-12 Supply Fan Performance 27½ 35TonTable PD-13 Supply Fan Performance 40 and 50Ton Gas Heat Electric Heat3 ID Coil Table PD-14 Component Static Pressure Drops in.W.G.1Heating System Filters2 Nominal Nominal Drive Table PD-15 Supply Air Fan Drive Selections20 HP Table PD-16- Power Exhaust Fan Performance VAV Units Only ControlsCV Units Only ConventionalThermostat Interface Unoccupied ZoneTemperature Control Cooling and HeatingSupply AirTempering Auto ChangeoverNight Setback Sensors Occupied/Unoccupied SwitchingFan Failure Switch Coil Freeze Protection FrostatSet 2. Rooftop units with Electric Heat Electrical Service SizingElectrical Data Table ED-2 27½-50Ton Electrical Service Sizing Data1 Figure DD-1 27 1/2 35Tons TC,TE,YC Low Heat Dimensional DataDimensional Data Figure DD-3 40-50Tons TC,TE,YC Low & High Heat Field Installed Sensors DimensionalConstant Integrated Comfort System Sensors CV and VAVTableW-4 Minimum Operating Clearances for Unit Installation WeightsTableW-2 Point Loading AverageWeight1 TableW-3 ComponentWeightsMechanical Specifications Unit Options Accessories LP Conversion Kit 20-60Ton File Number PL-RT-TC/TE/YC-27½ 50-TONS-PRC0007-EN-10-2001 Literature Order Number

RT-PRC007-EN specifications

The Trane RT-PRC007-EN is a part of Trane’s highly regarded line of air-cooled chillers, designed to provide exceptional performance and efficiency for a variety of commercial applications. This model is known for its robust engineering and cutting-edge technologies, making it a favored choice among facility managers and HVAC professionals.

One of the key features of the RT-PRC007-EN is its energy efficiency. Its advanced compressor design, alongside innovative heat exchanger technology, allows it to achieve significant energy savings, meeting or exceeding standards set by the Department of Energy. This efficiency not only results in lower operational costs but also contributes to a smaller carbon footprint, making it an environmentally friendly choice.

The chiller is equipped with variable speed compressors which adjust their output in relation to the cooling demand. This feature ensures optimal performance at all times, reducing energy consumption during partial load operations. Additionally, the RT-PRC007-EN incorporates Trane's unique Adaptive Control technology. This intelligent control system continuously monitors system parameters and environmental conditions, optimizing performance in real-time to ensure reliable operation.

Another standout characteristic of the RT-PRC007-EN is its quiet operation. The inclusion of sound-dampening technology and strategically placed acoustic insulation allows this chiller to operate with minimal noise, making it suitable for installations in noise-sensitive environments like hospitals or schools.

Durability is another hallmark of the RT-PRC007-EN. Built with high-quality materials, it is designed to withstand harsh operating conditions. Its corrosion-resistant components ensure longevity and reduce the need for extensive maintenance, making it a reliable choice for operators.

Lastly, the RT-PRC007-EN comes with a variety of customization options, including different refrigerant types, control systems, and capacity configurations. This flexibility allows it to adapt to the specific needs of different applications and building designs.

In summary, the Trane RT-PRC007-EN represents a fusion of efficiency, reliability, and advanced technology, making it an excellent option for those seeking a cutting-edge air-cooled chiller for their commercial HVAC needs.