Trane Understanding CVGF Controls and Protection Features
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Controls

Standard Protections

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 or less for any voltage magnitude sag

•Control-voltage sags of less than 3 line cycles for any magnitude sag

•Control-voltage sags of 40 percent or less for any amount of time

•Second-order or lower harmonic content on the line

The chiller may shut down under the following conditions:

•Line-voltage sags of 1.5 or more line cycles for voltage dips of 30 percentor more

•Control-voltage sags of 3 or more line cycles for voltage dips of 40 percentor more

•Third-order or higher harmonic content on the line

Current Overload Protection

The control panel will monitor the current drawn by each line of the motor and shut the chiller off when the highest of the three line currents exceeds the trip curve. A manual reset diagnostic describing the failure will be displayed. The current overload protection does not prohibit the chiller from reaching its full-load amperage.

The chiller protects itself from damage due to current overload during starting and running modes, but is allowed to reach full-load amps.

High Motor-Winding Temperature Protection

This function monitors the motor temperature and terminates chiller operation when the temperature is excessive. The controller monitors each of the three winding-temperature sensors any time the controller is powered up, and displays each of the temperatures at the service menu. Immediately prior to start, and while running, the controller will generate a latching diagnostic if the winding temperature exceeds 265°F(129.4℃) for 0.5 to 2 seconds.

Surge Detection Protection

Surge detection is based on current fl uctuations in one of three phases. The default detection criterion is two occurrences of root-man square (RMS) current change of 30 percent within 0.8 seconds in 60 + 10 percent seconds. With the Tracer chiller controller, the detection criterion is adjustable with the Tracer chiller controller.

Overvoltage and Undervoltage Protection

While some components of the chiller are impervious to dramatically different voltages, the compressor-motor is not. The control panel monitors all three line-to-line voltages for the chiller, and bases the over and undervoltage diagnostics on the average for the three voltages. The default protection resets the unit if the line voltage is below or above ±10 percent of the nominal for 60 seconds.

Power Factor and kW Measurement

Three-phase measurement of kW and unadjusted power factor yields higher accuracy during power imbalance conditions.

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Contents Centrifugal Water Chillers Model CvgfIntroduction IntroductionIntroducing Trane’s Model Cvgf Centrifugal Water Chiller Contents Features and Benefits Standard Cvgf FeaturesAdditional Features and Benefits Features and BenefitsEnvironmental Features and Benefits At-a-glance status Features and Benefits Tracer TU Interface CD-ROMFeatures and Benefits Tracer AdaptiViewTM Controller Building Automation and Chiller Plant ControlChiller-Tower Optimization Integrated Comfort System ICSWhy Centrifugal Compressors Surge Two-Stage Compressors Surge Less and LaterTemperature Application ConsiderationsCondenser Water Limitations Water PumpsApplication Considerations Water TreatmentGeneral Data Table GD-1 Model Cvgf DescriptionGeneral Data 60 Hz SI Units and English UnitsJobsite Connections Supply and Motor Lead Wiring and ConnectionsShipment and Assembly Standard Features ControlsControls Extended Operation PackageBase-Loading Control Hot-Water ControlStandard Protections Oil-Temperature Protection Phase-Unbalance ProtectionPhase-Loss Protection Phase Reversal/Rotation ProtectionHigh Motor-Winding Temperature Protection Power Factor and kW MeasurementCurrent Overload Protection Surge Detection ProtectionShort-Cycling Protection Restart Inhibit Free StartsPhysical Dimensions 60 Hz SI English UnitsPhysical Dimensions Model Cvgf Water Connection Pipe SizeMechanical Specifications Unit Control Panel Mechanical SpecificationsCondenser Compressor-Motor Starter Isolation PadsRefrigerant and Oil Charge PaintingConversion Table PSI
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CVGF specifications

The Trane CVGF series is a revolutionary innovation in the world of commercial HVAC systems, designed to deliver unparalleled performance and energy efficiency. This air-cooled chiller line is specifically engineered to meet the demands of modern buildings, making it an ideal choice for various applications such as offices, hospitals, and educational institutions.

One of the standout features of the CVGF series is its use of the Trane Adaptive Control technology. This advancement provides the system with real-time data analytics, allowing it to automatically adjust cooling output based on environmental conditions and load requirements. This level of adaptability not only enhances occupant comfort but also contributes to significant energy savings, aligning with sustainability goals.

The CVGF chillers also incorporate a robust and efficient scroll compressor, which operates quietly and minimizes vibration. This design choice ensures reliability and longevity while reducing operational noise levels, making it suitable for installations in noise-sensitive environments. Furthermore, the scroll compressor's efficiency plays a crucial role in achieving a higher coefficient of performance (COP), which translates to lower energy costs.

In terms of environmental responsibility, the CVGF series is designed with an eco-friendly refrigerant that supports lower global warming potential (GWP). Committed to sustainability, Trane ensures that these chillers not only meet but exceed regulatory requirements, allowing businesses to operate with a reduced carbon footprint.

Another remarkable characteristic of the CVGF line is its modular design, which simplifies installation and maintenance. The units are compact and can be easily integrated into existing infrastructure, minimizing disruption during upgrades or replacements. The straightforward maintenance protocols further enhance the system’s uptime, ensuring users enjoy consistent and reliable cooling performance.

Moreover, the CVGF chillers are equipped with advanced monitoring capabilities, accessible through Trane’s proprietary software. This feature enables facility managers to oversee system performance from any location, facilitating proactive adjustments and timely maintenance interventions.

Overall, the Trane CVGF series stands out as a cutting-edge solution for effective and sustainable cooling in commercial applications. By combining innovative technologies, energy-efficient design, and user-friendly features, the CVGF offers a comprehensive approach to achieving optimal climate control while meeting the challenges of the future.
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