Centrifugal Water Chillers Model CVGF Water-Cooled Hermetic Centrifugal Refrigeration Capacities From 400 to 1000 Tons (1400 kW-3510 kW) 50 and 60 Hz September 2004 CTV-PRC001-GB
Introduction Introducing Trane’s Model CVGF Centrifugal Water Chiller Introduction The basic gear driven centrifugal water chiller design was introduced in 1976 and has been proven in thousands of installations. The Trane Company continues to deliver its reliability and energy fitness commitment on its newest line of gear drive centrifugal water chillers, the Model CVGF.
Contents Introduction Features and Benefits Application Considerations General Data Jobsite Connections Controls Physical Dimensions Mechanical Specifications Conversion Table CTV-PRC001-GB 2 4 9 10 12 13 17 19 23 3
Features and Benefits Standard CVGF Features The following features are provided as standard with all Trane Model CVGF chillers: • Hermetic two-stage centrifugal compressor-motor assembly with integral lubrication system and economizer cycle • Evaporator and condenser assembly • Prewired instrument and control panel • Oil charge • Integral oil heaters • Isolation pads • Wiring and oil system interconnection to main control panel • Advance motor protection • Two-stage gear drive with economized cycle for hi
Features and Benefits Microprocessor Controls with CH530 DynaView Operator Interface DynaView™ is the unit-mounted control panel and also serves as the main processor and operator interface. It has a touch-sensitive overlay on a 1/4 VGA display. DynaView presents information through an intuitive, tabbed- navigation system. Alternate languages can be downloaded to the control panel, which can hold English plus two other languages at one time.
Features and Benefits Serviceability TechView™ Previous Trane chiller controllers included a user interface that presented all chiller data necessary for both daily tasks and service or maintenance tasks. The amount of information presented on a limited display made a number of tasks difficult. A service technician’s ability to assess and resolve chiller problems was hampered by the limited presentation of multiple pieces of chiller information.
Features and Benefits Feedforward Adaptive Control Building Automation and Chiller Plant Control The Tracer chiller controller allows the system designer to explore energy saving strategies and allows the centrifugal chiller to be used in ways that were never thought possible. For a preprogrammable and flexible building automation and chiller plant control, Trane has developed the Tracer Summit™.
Features and Benefits • Communication capabilities: several communication levels are provided: — local, through a PC workstation keyboard. Summit can be programmed to send messages to local or remote workstations and or a pager in the following cases: — Analog parameter exceeding a programmed value. — Maintenance warning. — Component failure alarm. — Critical alarm messages. In this latter case, the message is displayed until the operator acknowledges the receipt of the information.
Features and Benefits Two-Stage Compressor Widens the Application Range Why Centrifugal Compressors Surge Centrifugal compressors produce their pressure differential (head) by converting the kinetic energy of the gas leaving the impeller into static pressure. The velocity of this gas is the result of two components: • The radial velocity component Vr, which is directly proportional to the refrigerant gas flow Q.
Application Considerations Condenser Water Limitations Temperature Trane centrifugal 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.
General Data Table GD-1 – Model CVGF Description Model Nominal Cooling Capacity Heat Exchanger Size Evaporator Condenser Heat Exchanger Bundles Evaporator Condenser Heat Exchanger Tube Evaporator CVGF NTON 400 500 500 650 800 1000 EVSZ CDSZ 500 500 500 500 700 700 700 700 1000 1000 1000 1000 EVBS A = Small B = Medium C = Large A = Small B = Medium C = Large A = Small B = Medium C = Large A = Small B = Medium C = Large A = Small B = Medium C = Large D = Extra Large A = Small B = Mediu
General Data 50 and 60 Hz SI Units and (English Units) Table GD-3 – Evaporator and Condenser Flow rates (Minimum and Maximum, liters per second, gallons per minute) High Efficiency Shells - 0.75 inch (19 mm) Int.
Jobsite Connections Supply and Motor Lead Wiring and 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 Standard Features Field Connection The field-connected elements are involved in physically turning the chiller on or off. This involves ensuring that the chiller is not in an emergency or external stop condition, starting the pumps, and verifying that flow has been established. The optional, factorysupplied flow switch or a customer-supplied differentialpressure switch can be used to prove flow.
Controls Extended Operation Package Select the extended-operation package for chillers that require external, hot water control, and/or base-loading capabilities. This package also includes a 4-20 mA or 0-10 Vdc analog input for a refrigerant monitor. • External base-loading control input • External base-loading setpoint • External hot-water control input • Refrigerant monitor input Base-Loading Control This feature allows an external controller to directly modulate the capacity of the chiller.
Controls Tracer™ Chiller Controller The chiller controller uses proportionalintegral-derivative (PID) control for all limits—there is no dead band. This removes oscillation above and below setpoints and extends the capabilities of the chiller. Some of the standard protection features of the chiller controller are described in this section. There are additional protection features not listed here.
Controls Momentary Power Loss and Distribution Fault Protection Three-phase momentary power loss (MPL) detection gives the chiller improved performance through many different power anomalies. MPLs of 2.5 cycles or longer will be detected and cause the unit to shut down. The unit will be disconnected from the line within 6 line cycles of detection. If enabled, MPL protection will be active any time the compressor is running.
Physical Dimensions Figure PD-1 – Model CVGF Cooling Only With Unit Mounted Starter 50 and 60 Hz SI (English Units) Figure PD-2 – Model CVGF Cooling Only Without Unit Mounted Starter (for Remote Mounted Starter) 914 mm (36”) RECOMMENDED CLEARANCE 914 mm (36”) RECOMMENDED CLEARANCE HEIGHT HEIGHT WIDTH WIDTH 457 mm (18') RECOMMENDED CLEARANCE LENGTH Dimensions – SI Units (English Units) Clearance Tube Pull Comp.
Physical Dimensions Model CVGF Water Connection Pipe Size Water Passes Evaporator 2 Pass 3 Pass Condenser 2 Pass 500 Shell Size 700 Metric Pipe Size (mm) DN 1000 DN 200 (8”) DN 200 (8”) DN 250 (10”) DN 200 (8”) DN 300 (12”) DN 250 (10”) DN 250 (10”) DN 300 (12”) DN 350 (14”) Evaporator Water Box Length — SI (English) Shell 500 700 1000 Pressure 10 bar (150 psig) 10 bar (150 psig) 10 bar (150 psig) 10 bar (150 psig) 10 bar (150 psig) 10 bar (150 psig) Evap. NMAR NMAR NMAR NMAR NMAR NMAR No.
Mechanical Specifications The Trane CVGF packaged centrifugal water chillers using HFC-134a refrigerant consist of a hermetic two stage, gear-drive centrifugal compressor, evaporator, condenser, interstage economizer, unit-mounted microprocessor based control panel and compressor motor starter. The chiller is completely factory assembled. Motor The motor is a hermetic, liquid refrigerant cooled, two-pole, low-slip squirrel cage induction motor.
Mechanical Specifications Welded steel two pass water boxes are bolted to the tube sheets. Water connections are steel pipe stubs grooved for Victaulic couplings; flanged connections are optionally available. Maximum waterside working pressure of 10.5 bars (150 psi) is standard. The waterside is hydrostatically tested at 1.5 times maximum working pressure. Unit Control Panel The Tracer™ CH.
Mechanical Specifications Unit-mounted or remote-mounted starters for Europe (CE mark) will be star-delta, solid-state, across-the-line, primary reactor, and auto transformer only in a IP 20 enclosure. A steel panel door with optional mechanical interlock disconnects the system when the door is opened (required for CE listing). The panel also contains three-phase current transformer for overload protection, and an oil pump starter with overloads.
Conversion Table To Convert From: Length Feet (ft) Inches (In) Arca Square Feet (ft2) Square Inches (In2) Volume Cubic Feet (ft3) Cubic Inches (In3) Gallons (gal) Gallons (gal) Flow Cubic feet/min (cfm) Cubic Feet/min (cfm) Gallons/minute (GPM) Gallons/minute (GPM) Velocrty Feet per minute (ft/m) Feet per second (ft/s) To: Mulgpiy By: meters (m) millimeters (mm) To Convert From: To: Multiply By: Energy and Power and Capaclty British Thermal Units (BTUH) KilowattIkW) 0.
Literature Order Number CTV-PRC001-GB File Number PL-RF-CTV-000-PRC001-0904 Supersedes CTV-PRC001-GB 103 Literature Stocking Location Europe www.trane.com Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice. Only qualified technicians should perform the installation and servicing of equipment referred to in this publication.