Trane CVGF manual Controls, Extended Operation Package, Base-Loading Control, Hot-Water Control

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Controls

Optional Features

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

•External base-loading relay

•External hot-water control relay

•Refrigerant monitor input

Base-Loading Control

This feature allows an external controller to directly modulate the capacity of the chiller. It is typically used in applications where virtually infi nite sources of evaporator load and condenser capacity are available and it is desirable to control the loading of the chiller. Two examples are industrial process applications and cogeneration plants. Industrial process applications might use this feature to impose a specifi c load on the facility’s electrical system. Cogeneration plants might use this feature to balance the system’s heating, cooling, and electrical generation.

All chiller safeties and Adaptive Control functions are in full effect when Base Loading is enabled. If the chiller approaches full current, the evaporator temperature drops too low, or the condenser pressure rises too high, the controller’s Adaptive Control logic limits the loading of the chiller to prevent the chiller from shutting down on a safety limit. These limits may prevent the chiller from reaching the load requested by the Base Loading signal.

An alternative and less radical approach to Base Loading indirectly controls chiller capacity.

Artifi cially load the chiller by setting the chilled-water setpoint lower than it is capable of achieving. Then, modify the chiller’s load by adjusting the current-limit setpoint. This approach provides greater safety and control stability because it leaves the chilled-water temperature-control logic in effect. The chilled-water temperature control responds more quickly to dramatic system changes and limits chiller loading prior to reaching an Adaptive Control limit.

Hot-Water Control

This feature allows an external controller to enable/disable and modulate the hot-water control mode. Occasionally, centrifugal chillers are used to provide heating as a primary mission. In this case the external controller or operator would select a hot-water temperature setpoint and the chiller capacity would be modulated to maintain the setpoint. Heating is the primary mission and cooling is a waste product or a secondary mission. This technique provides application fl exibility, especially in multiple-chiller plants in conjunction with undersized heating plants.

The chiller needs only one condenser for hot-water control, whereas Heat Recovery uses a secondary condenser.

Refrigerant Monitor

The Extended Operation package allows for a refrigerant monitor to send a 4-20 mA signal to the Tracer AdaptiViewTM control display. It can be calibrated to correspond to either 0-100 ppm or 0-1,000 ppm concentration levels. The concentration level is displayed at Tracer AdaptiViewTM control, but the chiller will not take any action based on the input from the refrigerant monitor.

Alternatively, a refrigerant monitor can be connected to Tracer Summit, which has the ability to increase ventilation in the equipment room in response to high refrigerant concentrations.

CTV-PRC001-E4

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Contents Model Cvgf Centrifugal Water ChillersIntroduction IntroductionIntroducing Trane’s Model Cvgf Centrifugal Water Chiller Contents Standard Cvgf Features Features and BenefitsAdditional Features and Benefits Features and BenefitsEnvironmental Features and Benefits At-a-glance status CD-ROM Features and Benefits Tracer TU InterfaceBuilding Automation and Chiller Plant Control Features and Benefits Tracer AdaptiViewTM ControllerIntegrated Comfort System ICS Chiller-Tower OptimizationTwo-Stage Compressors Surge Less and Later Why Centrifugal Compressors SurgeApplication Considerations TemperatureCondenser Water Limitations Water PumpsWater Treatment Application ConsiderationsTable GD-1 Model Cvgf Description General Data60 Hz SI Units and English Units General DataJobsite Connections Supply and Motor Lead Wiring and ConnectionsShipment and Assembly Controls Standard FeaturesExtended Operation Package ControlsBase-Loading Control Hot-Water ControlStandard Protections Phase-Unbalance Protection Oil-Temperature ProtectionPhase-Loss Protection Phase Reversal/Rotation ProtectionPower Factor and kW Measurement High Motor-Winding Temperature ProtectionCurrent Overload Protection Surge Detection ProtectionRestart Inhibit Free Starts Short-Cycling Protection60 Hz SI English Units Physical DimensionsModel Cvgf Water Connection Pipe Size Physical DimensionsMechanical Specifications Unit Control Panel Mechanical SpecificationsCondenser Isolation Pads Compressor-Motor StarterRefrigerant and Oil Charge PaintingPSI Conversion Table
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Manual 24 pages 15.16 Kb

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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