CenTraVac™ Liquid Chillers Centrifugal Liquid Chillers/ Water-Cooled 170-3500 Tons 50 and 60 Hz Built For the Industrial and Commercial Markets CVHE — Three Stage CVHG — Three Stage 170 500 450 1300 CVHF — Two-Stage CenTraVac 325 1750 LHCV — Module CenTraVac 1300 3500 GPC — Gas Powered CenTraVac Package 170 April 2001 3500 CTV-PRC007-EN
Introduction What We Mean By Earth•Wise Breaking the .48 kW/Ton Efficiency Barrier The Trane Earth•Wise CenTraVac has a proven track record as literally the world’s most efficient, lowest emissions chiller. In fact, a portion of the product line is selectable at an unmatched efficiency level of .48 kW/ton, at standard ARI rated conditions. This is an efficiency level of 16 to 25 percent better than competitive chillers using other alternative refrigerants, which are typically in the .56 to .
Contents Introduction 2 Features and Benefits 6 Components, Standard and Optional Features, Factory Performance Testing, Refrigeration Cycle, Control Panel Unit Options 13 Unit Mounted Starter, Adaptive Frequency Drives, Free Cooling System Options 21 Auxiliary Condenser, Ice Storage, Heat Recovery, Chilled Water Resets CTV-PRC007-EN Application Considerations 26 Selection Procedure 28 Performance Data 30 Jobsite Connections 32 Controls 33 Weights 39 Physical Dimensions 41 Mechani
Introduction A Tradition of Innovation The first Trane centrifugal chiller, the Turbovac™ was introduced in 1938. The simple, direct drive, slow speed design of the Turbovac revolutionized the air conditioning industry. The chiller was attractive to customers because its hermetic design reduced frequent service requirements. In 1951 the Trane CenTraVac™ centrifugal chiller was introduced.
Introduction 1939 — The Trane Turbovac 1982 — The three-stage CVHE CenTraVac Chiller 1992 — The two-stage CVHF CenTraVac Chiller 1951 — The original Trane CenTraVac chiller 1992 — The LHCV CenTraVac Modular Chiller system 1965 — The Model PCV CenTraVac chiller Specific Trane centrifugal chiller performance is certified by ARI Standard 550/590.
Features and Benefits Comparing the Attributes of Low Pressure Chiller Operation to High Pressure Chiller Operation. Trane CenTraVac chillers continue to offer time tested and proven low pressure refrigerants including the alternative Evaporator Condenser Monitoring of leak rate Attributes of Low Pressure Chiller Operation environment friendly HCFC- 123. Trane CenTraVac chillers provide the safety of low pressure with continued product improvement in leak proof design.
Features and Benefits Control Panel Operator Control Panel Capabilities include: • Super-twist LCD display with backlighting for readability. • Chiller data (more than 200 items) including: - Status - Setpoints - Field start-up items - Machine configuration items - Service test items • Status reports: - Chiller Report - Refrigerant Report - Compressor Report • Custom report capability.
Features and Benefits Components Controls and paints for outdoor use or corrosive environments Internally enhanced or smooth bore tubes Various tube materials and thicknesses Victaulic or flanged connections UL label Marine or standard waterboxes 1, 2, 3, pass evaporator Factory installed insulation Special construction to facilitate chiller disassembly for construction projects with tight space clearances or component weight limitations 8 Full complement of electrical starters and accessories (u
Features and Benefits Standard and Optional Features Standard Features Optional Features The following features are provided as standard with all Trane CenTraVac™ chillers: • Motor-compressor assembly with integral lubrication system. • Evaporator condenser assembly. • Two-stage economizer assembly on CVHE/CVHG style units (single-stage on CVHF style units). • Prewired instrument and control panel. • Oil and refrigerant charge. • Oil heater.
Factory Testing for Assured Performance To prove that your chiller will perform as promised, Trane offers factory performance testing, which you can witness. Features and Benefits Factory Performance Testing The single package design of the CenTraVac chiller allows testing of each assembled chiller at the factory. Actually all components including the evaporator, condenser, compressor and control panel are tested before final assembly.
Features and Benefits Refrigeration Cycle The CenTraVac™ Chiller Operating Cycle Design Simplicity Impellers are keyed directly to the motor shaft for high reliability and performance and low life-cycle costs. Reliable Motor Cooling The motor is engulfed in liquid refrigerant to provide efficient, complete cooling at all load conditions. This system is reliable and easy to maintain.
Three-Stage CenTraVac P-H Diagram Features and Benefits Refrigeration Cycle (Cont.) further increasing its temperature and pressure to state point 5, then discharges it to the condenser. CenTraVac Two-Stage P-H Diagram The pressure-enthalphy (P-H) diagram describes refrigerant flow through the major CVHF chiller components. This diagram confirms the superior operating cycle efficiency of the two- stage compressor and economizer.
Unit-Mounted Starters Trane factory installed options make installation of a CenTraVac™ chiller easier, faster and less costly. Another example of the Trane packaged concept is the factory installed unit-mounted star delta starter available on CenTraVac chillers up to 1300 tons capacity or solid-state starters up to 1000 tons, depending on jobsite electrical requirements. It’s a single chiller/starter package designed for years of reliable operation and low life-cycle costs.
• System Design Time Cost Savings System design time is reduced, since all starter components and interconnecting wiring are preengineered and selected. • Complete package available with Agency Approval • Application The Trane unit mounted starter can be applied on low voltage (600 volts) and below applications up to approximately 1300 tons capacity. To determine the unit mounted starter to be used with a particular selection, it is necessary to know the current draw of the compressor motor.
Available options include: • Circuit Breaker — A standard interrupting capacity circuit breaker is available. The circuit breaker is mechanically interlocked to disconnect line power from the starter when the starter door is open. • High Interrupting Capacity Circuit Breaker — A high interrupting capacity circuit breaker is available. This breaker is also interlocked to disconnect line power from the starter when the starter door is open.
Unit Options Benefits Trane Adaptive Frequency drives* provide motor control, but they are much more than just starters. They also control the operating speed of the chiller compressor motor by regulating output voltage in proportion to output frequency. Varying the speed of the compressor motor can translate into significant energy cost savings.
Unit Options Adaptive Frequency Drives Condenser water temperature relief of chilled water reset Compressor lift reduction is required for a chiller application, both to provide stable chiller operation at part-loads and to achieve greater energy savings. Intelligent control to reduce condenser water temperature, or chiller water reset strategies are key to AFD savings in chiller applications.
Unit Options Free Cooling Allows Reduced Operating Costs Free Cooling Operation Schematic Consider a CenTraVac™ chiller option that can provide up to 45 percent of the nominal chiller capacity — without operating the compressor. Think of the significant energy and cost savings possible in many applications. This option is available on all Trane chillers, factory installed. Free cooling operation is based on the principle that refrigerant migrates to the area of lowest temperature.
Unit Options Temperature and humidity control requirements are important considerations when evaluating the use of CenTraVac free cooling. Low temperature outside air (from the outside air economizer) often requires a large amount of energy for humidification purposes. Free cooling operation helps to reduce these humidification costs on many applications. condenses and flows by gravity back to the evaporator.
System Options Auxiliary Condenser Auxiliary Condenser Benefits The Trane auxiliary condenser provides economical heat recovery for applications with small heating demand. It’s well-suited to preheat applications including domestic hot water, boiler makeup water and swimming pools. Simplicity No temperature controls are required. Auxiliary condensers are factorymounted and tested.
System Options Auxiliary Condenser (Cont.) Controls The auxiliary condenser was designed for simplicity of operation. Machine load, water flow rate, and temperature determine the amount of heat recovered. There are no controls needed for heating water temperature because no attempt is made to maintain a specific hot water temperature in or out of the auxiliary condenser. heating water temperature, and flow rate will allow.
System Options Ice Storage Provides Reduced Electrical Demand Ice storage is the hottest thing in cooling today. It has been accepted by building owners and tenants who are concerned about utility costs. An ice storage system uses a standard chiller to make ice at night when utilities charge less for electricity. The ice supplements or even replaces mechanical cooling during the day when utility rates are at their highest. This reduced need for cooling results in big utility cost savings.
System Options Heat Recovery Heat Recovery ™ Use of the Heat Recovery CenTraVac can significantly reduce the energy operating costs of many buildings by using heat which normally would be rejected to the atmosphere. Typical uses for this heat are perimeter zone heating, reheat air conditioning systems and any hot water requirements. Any building with a simultaneous heating and cooling load is a potential candidate.
Figure O-7 — Typical Operating Cycles System Options Heat Recovery (Cont.) contamination. Refrigerant gas from the compressor flows into both condenser shells allowing heat rejection to one or both condenser water circuits. as the chiller load decreases and less heat is rejected to the condenser. As the mean heating water temperature drops, so does the refrigerant condensing temperature and pressure difference which the compressor is required to produce at part load.
System Options Chilled Water Reset — Chilled water reset is often a practical means of reducing energy consumption during periods of the year when heating loads are high but cooling loads are reduced. Resetting the chilled water temperature increases the evaporator refrigerant pressure. This increased evaporator pressure reduces the pressure differential the compressor must generate while in the heat recovery mode.
For Applications Requiring CVHE 170-500 Tons (60 Hz) CVHG 450-1300 Tons (50 Hz) The Trane multi-stage CenTraVac chiller is built with a commitment to quality which has made it the world’s premier centrifugal chiller. • A multi-stage compressor for superior efficiency compared to single stage designs. Multi-stages also provide stable, surge-resistant operation. • Exceptionally quiet operation — lowest sound levels in the industry.
Application Considerations Condenser Water Limitations ™ Trane CenTraVac chillers start and operate over a range of load conditions with controlled water temperatures. Reducing the condenser water temperature is an effective method of lowering the chiller power input. However, the effect of lowering the condenser water temperature may cause an increase in system power consumption. In many applications Trane CenTraVac chillers can start and operate without control of the condenser water temperature.
Selection Procedure Selection The CenTraVac™ centrifugal chiller product line provides more than 200,000 individual unit selections over a capacity range of 170 through 3500 tons. Chiller selections and performance data can be obtained through the use of the CenTraVac chiller selection program available in local Trane sales offices. This program can provide a list of chiller selections optimized to closely match specific project requirements.
Selection Procedure Roughing-in Dimensions The dimensional drawings illustrate overall measurements of the chiller. The recommended space envelope indicates clearances required to easily service the CenTraVac chiller. A view of the unit is superimposed on this drawing with unit support feet shown. All catalog dimensional drawings are subject to change. Current submittal drawings should be referred to for detailed dimensional information.
Performance Data Evaporator Flow Rates (English & SI Units) Minimum/Maximum Evaporator Flow Rates (GPM) Shell Size EVSZ 032S 032S 032S 032S/L 032S/L 032S/L 050S 050S 050S 050S/L 050S/L 050S/L 080S 080S 080S 080S/L 080S/L 080S/L 142M/L 142M/L 142M/L 142M/L/E 142M/L/E 210L 210L 210L 210L 250E 250E Bundle Size EVBS 200 230 250 280 320 350 320 360 400 450 500 550 500 560 630 710 800 890 890 980 1080 1220 1420 1610 1760 1900 2100 2300 2500 One Pass SBCU TECU Min / Max Min / Max 216 / 1187 230 / 1237 242 / 13
Performance Data Condenser Flow Rates (English & SI Units) Minimum/Maximum Condenser Flow Rates (GPM) Shell Bundle Two Pass Size Size SBCU TECU CDSZ CDBS Min / Max Min / Max 032S 230 214 / 784 209 / 767 032S/L 250 239 / 877 234 / 857 032S/L 280 267 / 980 261 / 958 032S/L 320 295 / 1083 289 / 1059 050S 360 336 / 1233 329 / 1205 050S/L 400 378 / 1388 370 / 1357 050S/L 450 426 / 1563 417 / 1528 050S/L 500 473 / 1733 462 / 1695 080S 500 473 / 1733 462 / 1695 080S 560 529 / 1940 517 / 1896 080S/L 630 595 / 218
Jobsite Connections Supply and Motor Lead Wiring and Connections Figure J-1 — Electric Connections Copper conductors only should be connected to the compressor motor due to the possibility of galvanic corrosion as a result of moisture if aluminum conductors are used. Copper conductors are recommended for supply leads in the starter panel. Suggested starter panel line and load side lug sizes (when lugs are provided) are noted in the starter submittals.
Controls Advanced Controls Trane set the standard for unit microprocessor controls in 1985 with the first generation Unit control panel.
Controls Building Automation and Chiller Plant Control For building automation and control of chilled water plants, Trane has developed the Tracer Summit™. It can control the operation of the complete installation: chillers, pumps, cooling towers, isolating valves, air handlers and terminal units. It is a pre-programmable, but, flexible control system module, configured according to the requirements of the end user.
Controls Optimal Performance Regardless of the system level being designed, the unit controls become critical not just in making every level operate reliably but in facilitating optimal performance.
Controls • Evaporator leaving fluid temperature setpoint • Evaporator entering and leaving fluid temperatures • Condenser water entering and leaving water temperature • Current limit setpoint • Evaporator flow and condenser flow (optional) • Outdoor temperature (optional) • Fluid or water pressure drops (optional) evaporator and condenser • Active ice-making setpoint (if applicable) • Active hot water setpoint (if applicable) • Auxiliary heat recovery temperature Diagnostics Refrigerant Report Refrigerant
Controls Modules Conventional “relay logic” circuits have, been replaced by software and hardware imbedded in the CenTraVac™ microprocessor controller. The functions of the microprocessor are divided into six standard modules. Optional modules are available for those applications that require additional control capability. Optional communication interface modules are available for alternative control sources. All modules communicate with each other on the interprocessor communication bus (IPC).
Controls A demand for chilled water is determined by a temperature differential between the evaporator fluid setpoint and the supply fluid temperature. Start is inhibited and the condition enunciated if high condenser pressure or low oil temperature or high motor winding temperature is detected. Restart (defined as successive, unsuccessful attempts to start — also called shortcycling) Inhibit and the time remaining before restart can be attempted will be enunciated if this condition exists.
Weights 60 Hz Compressors (English & SI Units) Operating Weight** Shipping Weight** TYPE NTON CPKW EVSZ CDSZ (lbs) (kg) (lbs) (kg) CVHE 230-320 287 032S 032S 14909 6763 13721 6224 CVHE 230-320 287 032S 032L 15548 7053 14265 6471 CVHE 230-320 287 032L 032L 16422 7449 14911 6764 CVHE 230-320 287 050S 050S 18530 8405 16579 7520 CVHE 230-320 287 050S 050L 19498 8844 17394 7890 CVHE 230-320 287 050L 050L 20789 9430 18326 8313 CVHE 360-500 453 050S 050S 19180 8700 17229 7815 CVHE 360-500 453 050S 050L 20148 913
Weights 50 Hz Compressors (English & SI Units) Operating Weight** Shipping Weight** TYPE NTON CPKW EVSZ CDSZ (lbs) (kg) (lbs) (kg) CVHE 190-270 242 032S 032S 14259 6468 13071 5929 CVHE 190-270 242 032S 032L 14898 6758 13615 6176 CVHE 190-270 242 032L 032L 15772 7154 14261 6469 CVHE 190-270 242 050S 050S 17880 8110 15929 7225 CVHE 190-270 242 050S 050L 18848 8549 16744 7595 CVHE 190-270 242 050L 050L 21039 9135 17676 8018 CVHE 300-420 379 050S 050S 19180 8700 17229 7815 CVHE 300-420 379 050S 050L 20148 913
Physical Dimensions 50 Hz Compressors (English Units) ENGLISH UNITS Envelope Clearance W/O Unit With Unit Shell Mounted Mounted Tube Shell ArrangeStarters Starters Pull COMP Size ment EL EW EW CL1 CL2 Length 190-270 320 SS 26' 5” 10' 6 1/4” 11' 4 1/2” 11' 9” 3' 5” 11' 3” 190-270 320 SL & LL 33' 11 1/4” 10' 6 1/4” 11' 4 1/2” 15' 6” 3' 5” 15' 0 1/4” 190-270 500 SS 26' 6 3/8” 11' 4 5/8” 12' 6 7/8” 11' 9” 3' 6 3/8” 11' 3” C 190-270 500 SL & LL 34' 0 5/8” 11' 4 5/8” 12' 6 7/8” 15' 6” 3' 6 3/8” 15' 0 1/4” V 300
Physical Dimensions 50 Hz Compressors (SI Units) METRIC UNITS Envelope Clearance W/O Unit With Unit Shell Mounted Mounted Tube Shell ArrangeStarters Starters Pull COMP Size ment EL EW EW CL1 CL2 Length 190-270 320 SS 8052 3207 3467 3581 1041 3429 190-270 320 SL & LL 10344 3207 3467 4724 1041 4578 190-270 500 SS 8087 3470 3832 3581 1076 3429 C 190-270 500 SL & LL 10379 3470 3832 4724 1076 4578 V 300-420 500 SS 8087 3470 3797 3581 1076 3429 H 300-420 500 SL & LL 10379 3470 3797 4724 1076 4578 E 300-420 800
Physical Dimensions C V H E C V H F COMP 230-320 230-320 230-320 230-320 360-500 360-500 360-500 360-500 350-485 350-485 350-485 350-485 555 & 640 555 & 640 555 & 640 555 & 640 650-910 650-910 650-910 1060-1280 1060-1280 1060-1280 1060-1280 1470 1470 Shell Size 320 320 500 500 500 500 800 800 500 500 800 800 500 500 800 800 800 800 1420 1420 1420 2100 2500 2100 2500 Shell Arrangement SS SL & LL SS SL & LL SS SL & LL SS SL & LL SS SL & LL SS SL & LL SS SL & LL SS SL & LL SS SL & LL ML & LL ML &LL EL LL
Physical Dimensions 60 Hz Compressors (SI Units) METRIC UNITS Envelope Clearance W/O Unit With Unit Shell Mounted Mounted Tube Shell ArrangeStarters Starters Pull COMP Size ment EL EW EW CL1 CL2 Length 230-320 320 SS 8052 3207 3467 3581 1041 3429 230-320 320 SL & LL 10344 3207 3467 4724 1041 4578 230-320 500 SS 8087 3470 3832 3581 1076 3429 C 230-320 500 SL & LL 10379 3470 3832 4724 1076 4578 V 360-500 500 SS 8087 3470 3797 3581 1076 3429 H 360-500 500 SL & LL 10379 3470 3797 4724 1076 4578 E 360-500 800
Physical Dimensions Waterbox Connection Arrangement These graphics are intended to help you visualize the possible connections/combinations that may be available for your unit. You must contact your local Trane office who can configure your selection as an as-built drawing to confirm it is available and to provide appropriate dimensions.
Physical Dimensions Waterbox Lengths – English Units SHELL 320 320 320 320 320 320 320 320 320 320 320 320 500 500 500 500 500 500 500 500 500 500 500 500 800 800 800 800 800 800 800 800 800 800 800 800 1420 1420 1420 1420 1420 1420 1420 1420 1420 1420 1420 1420 210 210 210 210 210 210 210 210 210 210 210 210 250 250 250 250 250 250 250 250 250 250 250 250 46 PRESSURE 150 PSIG 150 PSIG 150 PSIG 150 PSIG 150 PSIG 150 PSIG 300 PSIG 300 PSIG 300 PSIG 300 PSIG 300 PSIG 300 PSIG 150 PSIG 150 PSIG 150 PSIG 150
Physical Dimensions Waterbox Lengths – Metric Units SHELL 320 320 320 320 320 320 320 320 320 320 320 320 500 500 500 500 500 500 500 500 500 500 500 500 800 800 800 800 800 800 800 800 800 800 800 800 1420 1420 1420 1420 1420 1420 1420 1420 1420 1420 1420 1420 210 210 210 210 210 210 210 210 210 210 210 210 250 250 250 250 250 250 250 250 250 250 250 250 CTV-PRC007-EN PRESSURE 150 PSIG 150 PSIG 150 PSIG 150 PSIG 150 PSIG 150 PSIG 300 PSIG 300 PSIG 300 PSIG 300 PSIG 300 PSIG 300 PSIG 150 PSIG 150 PSIG 15
Mechanical Specification Compressor Guide Vanes Fully modulating variable inlet guide vanes provide capacity control. The guide vanes are controlled by an externally mounted electric vane operator in response to refrigeration load on the evaporator. Impellers Fully shrouded impellers are high strength aluminum alloy and directly connected to the motor rotor shaft operating at 3,600 rpm (60 hertz), 3,000 rpm (50 hertz).
Mechanical Specification Condenser/Heat Recovery Condenser Shell and Waterboxes The condenser shell is formed of carbon steel plate designed and constructed in accordance with ANSI/ASHRAE 15 Safety Code. For all units, all pass arrangements are available at 150 psig or 300 psig water side working pressures with grooved connections. Flanged connections are also available. Marinetype waterboxes are available.
Mechanical Specification The display also provides over 20 reports that are organized into four groupings: Custom Report, Chiller Report, Refrigerant Report, and Compressor Report. Each report contains data that is accessed by scrolling through the menu items. Each grouping will have a heading which describes the type of data in that grouping.
Mechanical Specification Trane Adaptive Frequency™ Drive (AFD) The Trane AFD is a closed-loop, liquidcooled, microprocessor based PWM design that converts fixed utility voltage and frequency to a variable voltage and frequency via a two-step operation. The AFD is both voltage and current regulated. Output power devices: IGBT transistors. The AFD is factory mounted on the chiller and ships completely assembled, wired and tested.
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