Air-Cooled Series R™ Rotary Liquid Chiller Model RTAA 70 to 125 Tons Built for the Industrial and Commercial Markets August 2002 RLC-PRC016-EN
Features and Benefits © 2 2002 American Standard Inc. All rights reserved. You… Designed by Customers…. Like its chillers, Trane wants its relationships with customers to last. Trane is interested in maintaining long term, loyal relationships. This perspective means the point in time that a customer purchases a chiller is the beginning of a relationship, not the end. Your business is important, but your satisfaction is paramount.
Contents Features and Benefits The standard ARI rating condition (54/44°F and 95°F) and IPLV are ARI certified. All other ratings, including the following, are outside the scope of the certification program and are excluded: • Glycol. • 50 Hz. • Remote evaporator models.
Features and Benefits Improvements The RTAA 70-125 offers the same high reliability of its larger predecessor coupled with lowered sound levels, increased energy efficiency, and reduced physical footprint, all due to its advanced design, low speed/direct drive compressor and proven Series R™ performance. be at least 10% better than any product standard for that product. In the case of chillers, that product standard is ASHRAE 90.1. Trane’s RTAA 70-125 meets and exceeds the efficiency requirements of 90.
Features and Benefits Excellent Reliability A building environment is expected to be comfortable. When it is, no one says a word. If it’s not… that’s a different story. The same is true with chillers. No one ever talks about chillers, yet alone compressors, until they fail, and tenets are uncomfortable and productivity is lost. Trane’s helical rotary compressors have a first year reliability rate of over 99%, which means our chillers stay running when you need them.
Features and Benefits RTAA 70-125 Chiller Highlights • High Reliability, with over 99% compressor reliability rate in the first year of operation, and Adaptive Controls to keep the chiller on line producing cold water during adverse conditions. • High Efficiency (all units exceed ASHRAE 90.1 efficiency standard). • Low sound levels. • Small footprint, with smallest required application space (operating footprint) in the industry. • Years of research, testing, and successful applications.
Features and Benefits Optimum Efficiencies Superior Full Load Efficiency Great Part Load Efficiency With Trane Helical Rotary Screw Compressors and Electronic Expansion Valve Precise Rotor Tip Clearances Higher energy efficiency in a helical rotary compressor is obtained by reducing the rotor tip clearances. This reduces the leakage between high and low pressure cavities during compression. Precise rotor tip clearance is achieved with the latest manufacturing and machining technology.
Features and Benefits Electronic Expansion Valve When coupled with Trane’s Adaptive Control™ microprocessor, our electronic expansion valve significantly improves part-load performance of the Series R™ chiller by minimizing superheat in the evaporator and allowing the chiller to run at reduced condensing temperatures. Chillers which use conventional TXV’s must run at higher head pressures and consume more power than necessary at part-loads.
Features and Benefits Trouble-Free Installation, Start-Up and Operation Adaptive Control™ Microprocessor The RTAA 70-125 chiller offers advanced microprocessor control and features the Adaptive Control microprocessor. So what is the Adaptive Control microprocessor? Adaptive Control means the Unit Control Module (UCM) directly senses the control variables that govern operation of the chiller: motor current draw, evaporator temperature, condenser temperature, etc.
Features and Benefits Close Spacing Of Chiller The air-cooled Series R™ chiller has the tightest recommended side clearance in the industry, four feet, but that is not all. In situations where equipment must be installed with less clearance than recommended, such as frequently occurs in retrofit and rooftop applications, restricted air flow is common. Conventional chillers may not work at all.
Features and Benefits Superior Control Unit Control Module Features Unit Control Module Trane’s Adaptive Control™ microprocessor control system enhances the air-cooled Series R™ chiller by providing the very latest chiller control technology. Equal Compressor Sequencing Trane maximizes both compressor and motor life by equalizing both the number of starts and the operating hours. The UCM will start the compressor with the least number of starts and turn off the compressor with the most operating hours.
Features and Benefits Easy Chiller System Logging The UCM displays data required to log the chiller system.
Model Number Description Model Nomenclature Digit Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 70-125 Tons Digits 1,2 — Unit Model RT = Rotary Chiller Digit 3 — Unit Type A = Air Cooled Digit 4 — Development Sequence A = First Sequence Digit 5, 6 & 7 — Nominal Capacity 070 = 70 tons 080 = 80 tons 090 = 90 tons 100 = 100 tons 110 = 110 tons 125 = 125 tons Digit 8 — Unit Voltage A = 200/60/3 C = 230/60/3 D = 380/60/3 4 = 460/60/3 5 = 575/60/3 S = Special Digit 9 — Compressor Starter Type Y = Y-Delta Clo
General Data Table G-1 — General Data RTAA — 70-125 Ton Size Compressor Quantity Nominal Size (1) Evaporator Water Storage Min. Flow Max. Flow 70 80 90 100 110 125 (Tons) 2 35/35 2 40/40 2 50/40 2 50/50 2 60/50 2 60/60 (Gallons) (Liters) (GPM) (L/Sec) (GPM) (L/Sec) 39.8 150.6 84 5.3 252 15.9 37.3 143.1 96 6.1 288 18.2 34.4 130.2 108 6.8 324 20.4 32.1 121.5 120 7.6 360 22.7 53.4 202.11 132 8.3 396 25.0 45.8 173.4 150 9.5 450 28.
Selection Procedure The chiller capacity tables, P-1 through P-12, cover the most frequently encountered leaving water temperatures. The tables reflect a 10°F (6°C) temperature drop through the evaporator. For temperature drops other than 10°F (6°C), refer to Table F-1, and apply the appropriate Performance Data Adjustment Factors. For chilled brine selections, refer to Figures F-2 and 3 for Ethylene and Propylene Glycol Adjustment Factors.
Application Considerations Application Considerations Certain application constraints should be considered when sizing, selecting and installing Trane air-cooled Series R™ chillers. Unit and system reliability is often dependent upon properly and completely complying with these considerations. Where the application varies from the guidelines presented, it should be reviewed with your local Trane sales engineer. Unit Sizing Unit capacities are listed in the performance data section.
Application Considerations b. Provide Vertical Clearance Vertical condenser air discharge must be unobstructed. While it is difficult to predict the degree of warm air circulation, a unit installed as shown on the left would have its capacity and efficiency significantly reduced. Performance data is based on free air discharge. c. Provide Lateral Clearance The condenser coil inlet must not be obstructed.
Application Considerations Water Treatment Dirt, scale, products of corrosion and other foreign material will adversely affect heat transfer between the water and system components. Foreign matter in the chilled water system can also increase pressure drop and, consequently, reduce waterflow. Proper water treatment must be determined locally, depending on the type of system and local water characteristics. Neither salt nor brackish water is recommended for use in Trane aircooled Series R™ chillers.
Application Considerations Typical Water Piping All building water piping must be flushed prior to making final connections to the chiller. To reduce heat loss and prevent condensation, insulation should be installed. Expansion tanks are also usually required so that chilled water volume changes can be accommodated. A typical piping arrangement is shown in Figure A-1. unloading.
Performance Adjustment Factors Table F-1 — Performance Data Adjustment Factors Chilled Fouling Water Factor Temp. Drop 8 0.00010 10 12 14 16 8 0.00025 10 12 14 16 Altitude CAP 1.000 1.000 1.001 1.003 1.004 0.988 0.988 0.990 0.991 0.993 Sea Level GPM 1.249 1.000 0.835 0.716 0.628 1.235 0.989 0.825 0.708 0.621 KW 1.000 1.000 1.001 1.001 1.001 0.996 0.998 0.998 0.998 0.999 CAP 0.996 0.997 0.997 0.999 1.000 0.984 0.986 0.987 0.988 0.990 2000 Feet GPM 1.245 0.996 0.832 0.714 0.626 1.230 0.985 0.822 0.
Performance Adjustment Factors Figure F-2 — Ethylene Glycol Performance Factors Figure F-3 — Propylene Glycol Performance Factors Figure F-4 — Ethylene Glycol and Propylene Glycol Freeze Point RLC-PRC016-EN 21
Performance Data Table P-1 — 60 Hz RTAA 70 Performance Data LWT (Deg. F) 40 42 44 46 48 50 55 75 kW 58.6 59.4 60.2 61.1 61.9 62.8 64.9 Tons 72.6 75.0 77.6 80.2 82.8 85.4 92.2 EER 12.9 13.1 13.4 13.7 14.0 14.3 14.9 Tons 68.7 71.1 73.5 76.0 78.5 81.1 87.6 English Entering Condenser Air Temperature (Degrees F) 85 95 kW EER Tons kW EER 64.3 11.2 64.6 70.8 9.7 65.1 11.5 66.9 71.6 10.0 65.9 11.8 69.3 72.4 10.2 66.8 12.0 71.7 73.2 10.5 67.6 12.3 74.1 74.1 10.7 68.5 12.6 76.5 75.0 11.0 70.6 13.2 82.8 77.2 11.
Performance Data Table P-3 — 60 Hz RTAA 90 Performance Data LWT (Deg. F) 40 42 44 46 48 50 55 75 kW 81.9 83.3 84.7 86.2 87.7 89.2 93.2 Tons 94.7 97.9 101.2 104.6 108.1 111.5 120.5 EER 12.3 12.6 12.8 13.0 13.3 13.5 14.0 Tons 89.9 93.0 96.2 99.4 102.6 106.0 114.5 English Entering Condenser Air Temperature (Degrees F) 85 95 kW EER Tons kW EER Tons 88.9 10.9 84.8 97.0 9.5 79.5 90.3 11.1 87.8 98.4 9.7 82.3 91.7 11.3 90.8 99.8 9.9 85.1 93.2 11.6 93.8 101.2 10.1 88.0 94.6 11.8 96.9 102.7 10.3 91.0 96.2 12.
Performance Data Table P-5 — 60 Hz RTAA 110 Performance Data LWT (Deg. F) 40 42 44 46 48 50 55 Tons 113.3 117.1 120.9 124.8 128.8 132.8 143.1 75 kW 102.5 104.3 106.1 107.9 109.8 111.7 116.7 EER 11.9 12.2 12.4 12.6 12.8 13.0 13.4 Tons 107.7 111.3 114.9 118.6 122.4 126.2 136.1 English Entering Condenser Air Temperature (Degrees F) 85 95 kW EER Tons kW EER Tons 110.7 10.6 101.7 120.3 9.3 95.2 112.4 10.8 105.1 122.0 9.5 98.4 114.2 11.0 108.5 123.7 9.7 101.7 116.0 11.2 112.0 125.5 9.9 105.1 117.8 11.4 115.
Performance Data Table P-7 — 50 Hz RTAA 70 Performance Data LWT (Deg. F) 40 42 44 46 48 50 55 75 kW 48.7 49.4 50.1 50.8 51.5 52.2 54.0 Tons 62.9 65.1 67.3 69.5 71.8 74.2 80.1 EER 14.0 14.3 14.6 14.9 15.2 15.5 16.2 Tons 59.5 61.6 63.7 65.9 68.1 70.4 76.1 English Entering Condenser Air Temperature (Degrees F) 85 95 kW EER Tons kW EER Tons 53.4 12.2 56.0 58.7 10.5 52.3 54.1 12.4 58.0 59.4 10.8 54.3 54.8 12.7 60.1 60.1 11.0 56.2 55.5 13.0 62.1 60.8 11.3 58.2 56.2 13.3 64.2 61.5 11.5 60.3 56.9 13.6 66.
Performance Data Table P-9 — 50 Hz RTAA 90 Performance Data LWT (Deg. F) 40 42 44 46 48 50 55 75 kW 68.1 69.3 70.5 71.8 73.1 74.4 77.8 Tons 82.1 85.0 87.9 90.9 93.9 97.0 105.0 EER 13.3 13.5 13.8 14.0 14.3 14.5 15.0 Tons 78.0 80.7 83.5 86.3 89.2 92.1 99.7 English Entering Condenser Air Temperature (Degrees F) 85 95 kW EER Tons kW EER Tons 73.9 11.7 73.5 80.6 10.2 68.9 75.1 12.0 76.1 81.7 10.4 71.3 76.3 12.2 78.8 82.9 10.7 73.8 77.5 12.4 81.5 84.1 10.9 76.4 78.8 12.6 84.2 85.4 11.1 79.0 80.1 12.9 87.
Performance Data Table P-11 — 50 Hz RTAA 110 Performance Data LWT (Deg. F) 40 42 44 46 48 50 55 75 kW 85.3 86.8 88.3 89.9 91.5 93.2 97.5 Tons 98.4 101.7 105.1 108.5 112.1 115.6 124.8 EER 12.8 13.1 13.3 13.5 13.7 13.9 14.4 Tons 93.5 96.7 99.9 103.1 106.5 109.9 118.6 English Entering Condenser Air Temperature (Degrees F) 85 95 kW EER Tons kW EER Tons 92.0 11.4 88.2 99.9 10.0 82.6 93.5 11.6 91.2 101.3 10.2 85.5 95.0 11.8 94.3 102.8 10.4 88.3 96.5 12.0 97.4 104.3 10.6 91.3 98.1 12.2 100.5 105.9 10.7 94.
Performance Data Table P-13 — ARI Part-Load Values (60 Hz) Unit RTAA 70 RTAA 80 RTAA 90 RTAA 100 RTAA 110 RTAA125 % Load 100 75 50 25 100 75 50 25 100 75 50 25 100 75 50 25 100 75 50 25 100 75 50 25 Tons 69.3 51.9 34.6 17.3 79.8 59.8 39.8 19.9 90.8 68.0 45.3 22.7 100.6 75.5 50.3 25.2 108.5 81.2 54.2 27.1 120.1 89.7 59.8 29.9 EER 10.2 12.0 14.6 16.1 10.2 11.7 14.9 12.6 9.9 11.3 13.5 13.6 9.7 11.0 13.5 14.8 9.7 11.0 13.7 14.8 9.8 11.2 13.7 13.4 IPLV 13.6 Tons 60.1 45.0 30.0 15.0 69.3 52.0 34.7 17.
Electrical Data Table E-1 — Electrical Data (50 & 60 Hz, 3 Phase) Unit Wiring Unit Rated # of Power Size Voltage (9) Connections (1) RTAA 70 200/60 1 230/60 1 380/60 1 460/60 1 575/60 1 380/50 1 400/50 1 415/50 1 RTAA 80 200/60 1 230/60 1 380/60 1 460/60 1 575/60 1 380/50 1 400/50 1 415/50 1 RTAA 90 200/60 1 230/60 1 380/60 1 460/60 1 575/60 1 380/50 1 400/50 1 415/50 1 RTAA 100 200/60 1 230/60 1 380/60 1 460/60 1 575/60 1 380/50 1 400/50 1 415/50 1 RTAA 110 200/60 1 230/60 1 380/60 1 460/60 1 575/60 1 380
Jobsite Connections Table J-1 – Customer Wire Selection Unit Size RTAA 70 RTAA 80 RTAA 90 RTAA 100 RTAA 110 RTAA 125 Rated Voltage 200/60 230/60 380/60 460/60 575/60 380/50 400/50 415/50 200/60 230/60 380/60 460/60 575/60 380/50 400/50 415/50 200/60 230/60 380/60 460/60 575/60 380/50 400/50 415/50 200/60 230/60 380/60 460/60 575/60 380/50 400/50 415/50 200/60 230/60 380/60 460/60 575/60 380/50 400/50 415/50 200/60 230/60 380/60 460/60 575/60 380/50 400/50 415/50 Wire Selection Size to Main Terminal
Jobsite Connections Figure J-1 — Typical Jobsite Wiring NOTES: 1. DASHED LINES INDICATE RECOMMENDED FIELD WIRING BY OTHERS. CHECK SALES ORDER TO DETERMINE IF WIRING IS REQUIRED FOR SPECIFIC OPTIONS. 2. ALL THREE PHASE MOTORS SUPPLIED WITH THE UNIT ARE PROTECTED UNDER PRIMARY SINGLE PHASE FAILURE CONDITIONS. 3. CAUTION - DO NOT ENERGIZE UNIT UNTIL CHECK OUT AND START-UP PROCEDURES HAVE BEEN COMPLETED.
Controls Microcomputer Controls A microcomputer-based controller controls the air-cooled Series R™ 70-125 ton chiller. The microcomputer controller provides better control than past controls as well as several new, important benefits. Adaptive Control™ Microprocessor The microcomputer-based controller allows Trane to optimize controls around the chiller application and the specific components used in the air-cooled Series R™ chiller.
Controls Simple Interface With Other Control Systems Microcomputer controls afford simple interface with other control systems, such as time clocks, building automation systems and ice storage systems. Wiring to the unit can be as simple as two wires! This means you can have the flexibility to meet job requirements while not having to learn a complicated control system. Safety Controls A centralized microcomputer offers a higher level of machine protection.
Controls Optional Features 1. Communication Interface Capability for communication with one of the following control devices: a Trane Tracer™ Building Automation Systems b Remote Display 2. External Chilled Water Setpoint Allows the external setting independent of the front panel setpoint by one of three means: a) a remote resistor input (fixed or adjustable), b) a 2-10 VDC input, or c) a 4-20 mA input. 3.
Controls Trane Controls System Tracer Summit controls — Interface With The Trane Integrated Comfort System (ICS) Trane Chiller Plant Control The Tracer Summit Chiller Plant Building Management System with Chiller Plant Control provides building automation and energy management functions through stand-alone control. The Chiller Plant Control is capable of monitoring and controlling your entire chiller plant system.
Controls Required Options 1 Tracer Interface Additional Options That May Be Used Ice Making Control External Trane Devices Required Tracer Summit™, Tracer 100 System or Tracer Chiller Plant Control Ice Making Systems Controls An ice making option may be ordered with the air-cooled Series R™ chiller. The unit will have two operating modes, ice making and normal daytime cooling.
Controls Other Control Systems Interface With Other Control Systems Stand-alone Unit Interface to stand-alone units is very simple; only a remote auto/stop for scheduling is required for unit operation. Signals from the chilled water pump contactor auxiliary or a flow switch are wired to the chilled waterflow interlock. Signals from a timeclock or some other remote device are wired to the external auto/stop input.
Controls 38 Ice Making Systems Required Features An ice making option may be ordered with the air-cooled Series R™ chiller. The unit will have two operating modes, ice making and normal daytime cooling. In the ice making mode, the air-cooled Series R™ chiller will operate at full compressor capacity until the return chilled fluid temperature entering the evaporator meets the ice making set point. This ice making setpoint is manually adjusted on the unit’s microcomputer.
Controls RLC-PRC016-EN Remote Display Required Features The remote display option allows the operator to monitor chiller operation from a remote location. Over 60 essential chiller operating parameters can be transmitted between the unit control module on the chiller and the remote display via a bi-directional communications link. Only one twisted wire pair is required between the chiller and the remote display.
Dimensional Data Figure D-1 — RTAA 70-125 Unit Dimensions UNIT SIZE 70-100 110-125 UNIT SIZE NO. FANS STD UNIT PANEL TYPE X-LINE CONTROL PANEL WYE DELTA CONTROL PANEL 40 A .492m (1’-7 3/8”) .479m (1’-6 7/8”) B C D E 1.213m 2.851m 102mm 4.940m (3’-11 3/4”) (9’-4 1/4”) (4”) (16’-2 1/2”) 1.032m 3.499m 152mm 5.626m (3’-4 5/8”) (11’-5 3/4”) (6”) (18’-5 1/2”) NO. OF FANS PER UNIT 70 80 90 100 110 8 8 9 L 10 10 F G 2.317m 1.549m (7’-7 1/4”) (5’-1”) 2.661m 1.511m (8’-8 3/4”) (4’-11 1/2”) K 1.
Weights Table W-1 — Packaged Unit Weights (Aluminum) Unit Size RTAA 70 RTAA 80 RTAA 90 RTAA 100 RTAA 110 RTAA 125 Units lbs. kg lbs. kg lbs. kg lbs. kg lbs. kg lbs.
Options Low Temperature Brine The unit controls can be factory set to handle low temperature brine applications (0°F to 39°F). Ice Making The unit controls can be factory set to handle ice making for thermal storage applications. Building Automation System Communication Interface Permits either bi-directional communication to the Trane Integrated Comfort™ system or permits remote chilled water setpoint and demand limiting by accepting a 4-20 mA or 2-10 Vdc analog signal.
Typical Wiring Diagram 70-125 Tons NOTES: 1. DASHED LINES INDICATE RECOMMENDED FIELD WIRING BY OTHERS. PHANTOM LINES INDICATE ALTERNATE CIRCUITRY OR AVAILABLE SALES OPTION. CHECK SALES ORDER TO DETERMINE IF WIRING IS REQUIRED FOR SPECIFIC OPTIONS. 2. ALL THREE PHASE MOTORS SUPPLIED WITH THE UNIT ARE PROTECTED UNDER PRIMARY SINGLE PHASE FAILURE CONDITIONS. 3. CAUTION - DO NOT ENERGIZE UNIT UNTIL CHECK OUT AND START-UP PROCEDURES HAVE BEEN COMPLETED.
Typical Wiring Diagram 44 70-125 Tons RLC-PRC016-EN
Features Summary Trane RTAA Air-Cooled Series R™ Chiller Designed To Perform, Built To Last Reliability • Proven Trane helical rotary screw compressor design for longer life and greater dependability. • Fewer moving parts means less parts to fail. Typical reciprocating compressors have 4 times as many total parts and 15 times as many critical parts. • Adaptive Control™ protects the chiller when any of the system variables approaches a limit condition that may damage the unit or cause a shutdown.
Mechanical Specifications General Units are leak and pressure tested at 450 psig high side, 300 psig low side, then evacuated and charged. Packaged units ship with a full operating charge of oil and refrigerant. Unit panels, structural elements and control boxes are constructed of 12-gauge galvanized steel and mounted on a welded structural steel base. Unit panels and control boxes are finished with a baked on powder paint, and the structural base with an air dry paint.
Mechanical Specifications Refrigeration Circuits Each unit has two refrigerant circuits, with one rotary screw compressor per circuit. Each refrigerant circuit includes a compressor suction and discharge service valve, liquid line shutoff valve, removable core filter drier, liquid line sight glass with moisture indicator, charging port and an electronic expansion valve. Fully modulating compressors and electronic expansion valves provide variable capacity modulation over the entire operating range.
Standard Conversion Table 48 RLC-PRC016-EN
Trane A business of American Standard Companies www.trane.com For more information contact your local district office or e-mail us at comfort@trane.com Literature Order Number RLC-PRC016-EN File Number PL-RF-RLC-PRC016-EN-08 02 Supersedes RLC-DS-2 Stocking Location Inland-La Crosse Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice.
