Trane CVGF manuale d’uso

Centrifugal W ater Chillers Model CVGF W ater -Cooled Hermetic Centrifugal Refrigeration Capacities fr om 400 to 1000 T ons (1400 ∼ 3510 kW) 50 and 60 Hz October 2008 CTV -PRC001-E4[...]

Introducing T rane’ s Model CVGF Centrifugal Water Chiller Introduction The basic gear driven centrifugal water chiller design was introduced in 1976 and has been pr oven in thousands of installations. T rane continues to deliver its r eliability and energy fi tness commitment on its newest line of gear -drive centrifugal water chillers, the Mod[...]

Introduction ………………………………………………………………………… 2 Features and Benefi ts …………………………………………………………… 9 Application Considerations …………………………………………………… 10 General Data …………………………………………?[...]

Standard CVGF Featur es The following features ar e provided as standar d with all T rane Model CVGFchillers: • Hermetic two-stage centrifugal compressor -motor assembly with integral lubrication system and economizer cycle • Evaporator and condenser assembly • Prewir ed instrument and control panel • Oil charge • Integral oil heaters •[...]

Advanced Heat T ransfer Surfaces • Evaporator and condenser tubes use the latest heat transfer surfaces • Less refrigerant needed due to advanced patented evaporator design Compact Size • Designed with the retr ofi t and replacement market in mind • The 400 to 500 NTON sizes can fi t through most double-width doors • Small footprint of [...]

T racer AdaptiView TM Control Operator Interface T racer AdaptiView TM contr ol is the unit-mounted operator interface with a touch sensitive 12/1" display . The display pr esents information through an intuitive navigation system. Alternate languages are also available for the contr ol panel display . T racer AdaptiView TM contr ol receives i[...]

7 Features and Benefi ts T racer TU Interface The T racer chiller contr oller adds a level of sophistication better served by a PC application to improve service technician effectiveness and minimize chiller downtime. T racer AdaptiView™ c ontrol is intended to serve only typical daily tasks. The portable PC-based service-tool software, T racer [...]

T racer AdaptiView TM Controller T oday's centrifugal chillers offer predictive contr ols that anticipate and compensate for load changes. Other control strategies made possible with the T racer AdaptiView TM controls are: Feedforward Adaptive Contr ol Feedforward is an open-loop, pr edictive control strategy designed to anticipate and compens[...]

• Time of day scheduling: allows the end user to defi ne the occupancy period, i.e. time of the day , holiday periods and exception schedules. • Optimization of the start/stop time of the installation: based on the programmed schedule of occupancy and on the historical temperature r ecords, T racer Summit TM calculates the optimal start/stop t[...]

T wo-Stage Compr essor Widens the Application Range Why Centrifugal Compressors Surge Centrifugal compressors pr oduce their pressur e differential (head) by converting the kinetic energy of the gas leaving the impeller into static pressur e. The velocity of this gas is the result of two components: • The radial velocity component V r , which is [...]

Condenser W ater Limitations T emperature T rane centrifugal chillers start and operate over a range of load conditions with controlled water temperatures. Reducing the condenser water temperatur e is an effective method of lowering the chiller power input. However , the effect of lowering the condenser water temperatur e may cause an increase in s[...]

Application Considerations Contact your local T rane Sales Offi ce for information regar ding optimum condenser water temperatures and fl ow rates for a specifi c application. W ater T reatment The use of untreated or impr operly treated water in a chiller may r esult in scaling, erosion, corrosion, algae, or slime. It is recommended that the se[...]

General Data 13 T able GD-1 – Model CVGF Description Model CVGF Nominal Cooling Capacity NTON 400 500 500 650 800 1000 Heat Exchanger Size Evaporator EVSZ 500 500 700 700 1000 1000 Condenser CDSZ 500 500 700 700 1000 1000 Heat Exchanger Bundles Evaporator EVBS A = Small A = Small A = Small A = Small A = Small A = Small B = Medium B = Medium B = M[...]

14 General Data 50 and 60 Hz SI Units and (English Units) High Effi ciency Shells - 0.75 inch (19 mm) Internally Enhanced Cu T ube: Condenser: Nominal Shell 500 500 500 700 700 700 1000 1000 1000 1000 Bundle Size Small Medium Large Small Medium Large Small Medium Large Extra Large Number of Passes 2 2 2 2 22222 2 Min Flow L/s (gpm) 31 (487) 34 (54[...]

Supply and Motor Lead Wiring and Connections Only copper conductors should be connected to the compressor motor due to the possibility of galvanic corrosion as a r esult of moisture if aluminum conductors ar e used. Copper conductors are recommended for supply leads in the starter panel. Suggested starter panel line- and load-side lug sizes (when l[...]

16 Standard Featur es Field Connection The fi eld-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 fl ow has been established. The optional, factory-supplied fl ow switch or a customer - su[...]

Extended Operation Package Select the extended-operation package for chillers that requir e 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 • External base-loading relay • External hot-water control relay ?[...]

18 Controls Standard Protections Standard Pr otections The chiller controller uses pr oportional-integral-derivative (PID) control for all limits—ther e is no dead band. This removes oscillation above and below setpoints and extends the capabilities of the chiller . Some of the standard pr otection features of the chiller contr oller are describe[...]

Standard Protections 19 Oil-T emperature Pr otection Low oil temperature when the oil pump and/or compr essor are running may be an indication of refrigerant diluting the oil. If the oil temperatur e is at or below the low oil-temperature setpoint, the compressor is shut down on a latching diagnostic and cannot be started. The diagnostic is reporte[...]

20 Controls levels at which this may occur . It is diffi cult to defi ne an exact voltage sag or voltage level at which a particular motor will no longer consume power , but we are able to make some general statements concerning MPL protection: The chiller will remain running under the following conditions: • Line-voltage sag of 1.5 line cycles[...]

Standard Protections Short-Cycling Protection This function mimics heat dissipation from a motor start using two setpoints: Restart Inhibit Free Starts and Restart Inhibit Start-to-Start Timer . This allows the CVGF to inhibit too many starts in a defi ned amount of time while still allowing for fast restarts. The default for CVGF is 3 Free Starts[...]

22 Figure PD-1 –Model CVGF Cooling Only With Unit-Mounted Starter Figure PD-2 –Model CVGF Cooling Only Without Unit-Mounted Starter (for Remote-Mounted Starter) CL1 at either end of machine and is requir ed for tube pull clearance. CL2 is always at the opposite end of machine from CL1 and is for water box plus clearance. – Recommended clearan[...]

Model CVGF Water Connection Pipe Size Shell Size 500 700 1000 W ater Passes Metric Pipe Size (mm) DN Evaporator 2 Pass DN 200 (8”) DN 250 (10”) DN 300 (12”) 3 Pass DN 200 (8”) DN 200 (8”) DN 250 (10”) Condenser Condenser DN 250 (10”) DN 300 (12”) DN 350 (14”) 23 Evaporator Water Box Length — SI (I-P) Length No. mm (in) Shell Pre[...]

T rane 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 micropr ocessor based control panel , and compr essor motor starter . The chiller is entire factory assembled. Compressor T wo-stage centrifug[...]

25 Condenser The condenser is designed, tested and stamped in accordance with the ASME Boiler and Pr essure V essel Code or PED (European Code) for a refrigerant side working pr essure of 15.2 bars (220 psig). It consists of a carbon steel shell with steel tube sheets welded to each end. Individually- replaceable, externally-fi nned and internally[...]

Compressor -Motor Starter Unit-mounted starters can either be a star -delta or solid-state in NEMA 1 type enclosure rated up to 952 RLA at 380-480 V olts (star -delta), 900 RLA at 481-600 V olts (star -delta), and 1472 RLA at 380-600 V olts (solid-state). Remote-mounted starters can either be star -delta or solid-state for low voltage. Across-the-l[...]

27 T o Convert From: T o : Multiply By: Length Feet (ft) meters(mm) 0.30481 Inches (In) millimeters (mm) 25.4 Area Square Feet (ft 2 ) square meters (m 2 ) 0.093 Square Inches (In 2 ) square millimeters (mm 2 ) 645.2 V olume Cubic Feet (ft 2 ) Cubic meters (m 3 ) 0.0283 Cubic Inches (In 3 ) Cubic mm (mm 3 ) 16387 Gallons (gal) Iitres (L) 3.875 Gall[...]

www .trane.com For more information, contact your local T rane offi ce or e-mail us at comfort@trane.com T rane has a policy of continuous product and data improvement and reserves the right to change design specifi cations without notice. Literature Or der Number Date Supersedes CTV -PRC001-E4 October 2008 September 2004[...]