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Packaged Heat Pumps
Precedent™
3-10 Tons - 60 Hz
PKGP-PRC003-EN
September 2004
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Introduction Packaged Rooftop Air Conditioners Through the years, Trane has designed Trane customers demand products that and developed the most complete line of provide exceptional reliability, meet Packaged Rooftop products available in stringent performance requirements, the market today. Trane was the first to and are competitively priced. Trane introduce the Micro—microelectronic unit delivers with Precedent. controls—and has continued to improve Precedent features cutting edge and revolut
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Contents Introduction 2 Features and Benefits 4 11 Application Considerations Selection Procedure 12 Model Number Description 13 General Data 14 17 Performance Data Cooling Performance 17 20 Fan Performance Heat Performance 29 37 Controls 38 Electric Power 45 Dimension and Weights 53 Mechanical Specifications PKGP-PRC003-EN 3
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Features and Benefits Factory Installed Options Field Installed Options Black Epoxy Pre-Coated Coils CO Sensing 2 High Pressure Cutout Digital Display Zone Sensor Hinged Access Doors Dual Thermistor Remote Zone Sensor Phase Monitor High Static Drive Powered or Unpowered Convenience Manual Outside Air Damper Outlet Motorized Outside Air Dampers Supply and/or Return Air Smoke Powered Exhaust Detector Remote Potentiometer Through the Base Electrical Access Roof Curb
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Features and Benefits Precedent with ReliaTel reduces the Some zone sensor options have central Easy to Install, Service and number of components required to control panel lights which indicate the Maintain operate the unit, thereby reducing mode the unit is in and possible Because today’s owners are very cost- possibilities for component failure. diagnostic information (dirty filters for conscious when it comes to service and example). ReliaTel Makes Installing and maintenance, the Trane Preced
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Features and Benefits Compressors Digital Display Zone Sensor Outstanding Standard and Precedent contains the best compressor The Digital LCD (Liquid Crystal Display) Optional Components technology available to achieve the zone sensor has the look and functionality highest possible performance. Our of standard zone sensors. This sensor Black Epoxy Pre-Coated Coils compressor line includes reciprocating should be utilized with ReliaTel™ controls. The pre-coated coils are an economical and scrol
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Features and Benefits High Pressure Cutout Quick-Access Panels Standardized Components This factory-installed option is offered for Remove two screws for access to the Components are placed in the same units that do not have High Pressure standardized internal components and location on all Precedent units. Familiarize Cutout as standard. All 3-phase units with wiring. yourself with one Precedent and you are scroll compressors include High Pressure familiar with every Precedent. Quick-Adjust Idl
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Features and Benefits Unit Cabinet Ventilation Override Accessory Rigorous Testing The compact cabinet with rounded With the Ventilation Override Accessory All of Precedent’s designs were corners takes up less room and is less installed, the unit can be set to transition rigorously rain tested at the factory to costly to ship. The beveled and ribbed top to up to 3 different pre-programmed ensure water integrity. is not only aesthetically pleasing, it is sequences for Smoke Purge, designed to pr
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Features and Benefits Low V oltage Connections Single Point Power Easy to Install The wiring of the low voltage connections A single electrical connection powers the Convertible Units to the unit and the zone sensors is as unit. –The units ship in a downflow simple as 1-1, 2-2, and 3-3. This simplified Single Side Service configuration. They can be easily system makes it easy for the installer to Single side service is standard on all converted to horizontal by simply wire. units. moving two pan
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Features and Benefits Through the Base Electrical with Added Efficiency Disconnect Switch Airflow Factory installed 3-pole, molded case, Airflow is outstanding. The Precedent can disconnect switch with provisions for replace an older machine with old through the base electrical connections ductwork and, in many cases, improve are available. the comfort through better air Through the Base Utilities Access distribution. An electrical service entrance shall be Belt or direct drive – standard or pro
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Application Considerations Application of this product should be Condensate T rap within the cataloged airflow and cooling The evaporator is a draw-thru considerations. configuration. A trap must be field provided prior to start-up on the cooling Low Ambient Cooling cycle. The Precedent™ line features, with ReliaTel™ microprocessor controls, low Clearance Requirements ambient cooling down to 0°F. The recommended clearances identified with unit dimensions should be Barometric Relief maintained to
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Selection Procedures Step 4 Cooling Capacity Heating Capacity In order to select the correct unit which Step 1 Step 1 meets the building’s requirements, the Calculate the building’s total and sensible Calculate the building heating load using fan motor heat must be deducted from cooling loads at design conditions. Use the Trane calculation form or other the gross cooling capacity. The amount of the Trane calculation methods or any standard accepted method. heat that the fan motor generates is ot
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Model Number Description W S C 036 A 3 R B A ** C 0 0 0 A 1 0 0 0 1 A 1 1 2 34,5,67 8 9 10 11 12,13 14 15 16 17 18 19 20 21 22 23 24 25 DIGIT 14 - Fresh Air Selection DIGIT 1 - Unit Function DIGIT 20 - Convenience Outlet 0 = No Fresh Air W = Packaged Heat Pump 0 = No Convenience Outlet A = Manual Outside Air Damper 0-50% A = Unpowered Convenience Outlet B = Motorized Outside Air Damper 0-50% DIGIT 2 - Efficiency B = Powered Convenience Outlet C = Economizer, Dry Bulb 0-100% without S = Standard
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General (3, 4 Ton) Data Table GD-1 — General Data 3 T on Con ver tible Units 4 T on Con ver tible Units WSC036A1 WSC036A3,A4,AW WSC048A1 WSC048A3,A4,AW 1 Cooling Performance Gross Cooling Capacity 38,100 38,100 50,800 50,800 2 SEER 9.80 10.20 10.50 10.70 Nominal CFM / ARI Rated CFM 1,200 / 1,200 1,200 / 1,200 1,600 / 1,600 1,600 / 1,600 ARI Net Cooling Capacity 36,600 36,000 48,500 48,500 Integrated Part Load Value — — — — System Power (KW) 4.09 3.96 5.16 5.05 1 Heating Performance High Temp. B
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General Data (5, 6 Ton) Table GD-2 — General Data 5 T on Con ver tible Units 6 T on Con ver tible Units WSC060A1 WSC060A3,A4,AW WSC072A3,A4,AW 1 Cooling Performance Gross Cooling Capacity 63,100 63,100 74,000 2 EER/SEER — /9.70 — /10.10 10.6/ — Nominal CFM / ARI Rated CFM 2,000/2,000 2,000/2,0000 2,400/2,100 ARI Net Cooling Capacity 60,000 60,000 70,000 Integrated Part Load Value — — — System Power (KW) 6.90 6.74 6.6 1 Heating Performance High Temp. Btuh Rating 59,000 59,000 68,000 System Power
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General Data (7½, 10 Ton) Table GD-3 — General Data 7½ Ton Convertible Units 10 Ton Convertible Units WSC090A3, A4, AW WSC120A3, A4, AW 1 Cooling Performance Gross Cooling Capacity 93,000 121,000 2 EER 10.1 10.1 Nominal CFM / ARI Rated CFM 3,000/2,625 4,000/3,200 ARI Net Cooling Capacity 88,000 113,000 Integrated Part Load Value — 10.7 System Power (KW) 8.71 11.19 1 Heating Performance High Temp. Btuh Rating 88,000 108,000 System Power KW/COP 8.06/ 3.2 9.59/3.3 Low Temp. Btuh Rating 50,000 59,00
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Performance Data (3, 4 Ton) Table PD-1 — Gross Cooling Capacities (MBH) 3 Ton Single/Three Phase WSC036A1, A3, A4, AW Ambient T emperature (F) 85 95 105 115 Enter. Dry Entering Wet Bulb (F) CFM Bulb 61 67 73 61 67 73 61 67 73 61 67 73 Airflow (F) MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC 75 34.7 28.9 39.7 22.6 42.4 15.3 31.6 27.3 37.1 21.4 41.0 14.4 28.5 25.6 33.8 19.8 39.0 13.3 25.3 24.0 30.2 18.2 36.1 12.0 80 35.4 34.8 39.8 28.1 42.9 21.0 3
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Performance (5, 6 Ton) Data Table PD-3 — Gross Cooling Capacities (MBh) 5 Ton Three Phase WSC060A1,A3, A4, AW Ambient T emperature (F) 85 95 105 115 Enter. Dry Entering Wet Bulb (F) CFM Bulb 61 67 73 61 67 73 61 67 73 61 67 73 Airflow (F) MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC 75 56.7 48.0 64.9 37.3 68.9 25.0 52.5 45.7 61.6 35.5 67.6 23.9 48.1 43.4 56.8 33.2 65.2 22.5 43.5 41.0 51.4 31.6 60.9 20.6 80 58.3 58.1 65.1 46.5 69.6 34.5 54.4 54.
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Performance Data (7½, 10 Ton) Table PD-5 — Gross Cooling Capacities (MBh) 7½ Ton Three Phase WSC090A3, A4, AW Ambient T emperature (F) 85 95 105 115 Enter. Dry Entering Wet Bulb (F) CFM Bulb 61 67 73 61 67 73 61 67 73 61 67 73 Airflow (F) MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC MBH SHC 75 84.9 72.7 94.8 55.6 98.6 36.8 78.6 69.6 91.0 53.9 97.7 35.7 72.1 66.4 84.4 51.0 95.3 34.2 65.3 63.2 76.7 47.8 90.8 32.4 80 86.9 86.9 95.1 68.8 99.8 50.9 81.9 81
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Performance (3, 4, 5 Ton) Data Table PD-7 — Direct Drive Evaporator Fan Performance — 3, 4 And 5 Ton WSC036A, WSC048A, WSC060A 1 External Static Pressure (Inches of Water) & Motor Power (Bhp) 2 Standard Motor Oversized Motor Unit High Speed Low Speed High Speed Low Speed Tons Model No. CFM ESP BHP ESP BHP ESP BHP ESP BHP 960 0.81 0.36 0.61 0.28 0.96 0.39 0.89 0.35 1020 0.77 0.37 0.57 0.28 0.94 0.41 0.86 0.47 1080 0.73 0.38 0.50 0.29 0.91 0.43 0.82 0.39 1140 0.69 0.39 0.42 0.29 0.88 0.44 0.
