Mechanical Speciﬁcations

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 entire factory assembled.

Compressor

Two-stage centrifugal compressor with high-strength aluminum alloy, fully shrouded impellers. The impellers are tested at 25 percent over-design operating speed. The rotating assembly is dynamically balanced for vibration of less than 5.1 mm/s (0.2 ips peak velocities) at nominal operating speeds. The control system affords and admitted 100 - 20 percent capacity modulation by electrically actuated guide vanes upstream of each impeller.

Drive Train

The drive train consists of helical bull and pinion gears. Gear tooth surfaces are case hardened and precision ground. The one-piece impeller shaft is supported by hydrodynamic thrust and radial bearings.

Motor

The motor is a hermetic, liquid-refrigerant cooled, two-pole, low-slip, squirrel-cage induction motor. A radial hydrodynamic bearing and duplex angular contact ball bearings support the rotor assembly. Winding-embedded sensors provide positive thermal protection.

Lubrication System

The lubrication system consists of an internal oil sump with heaters, positive displacement oil pump, brazed plate condenser-cooled oil cooler, and oil distillation/return line.

Economizer/Oriﬁce

The economizer consists of a carbon steel shell with internal components designed to prevent liquid carryover to the compressor. Liquid refrigerant is admitted through a single calibrated oriﬁ ce (no moving parts) which maintains a pressure differential between condenser and economizer.

Evaporator

The evaporator is designed, tested and stamped in accordance with ASME Boiler and Pressure Vessel Code or PED (European Code) for refrigerant side working pressure of 15.2 bars (220psig). It consists of a carbon steel shell with steel tube sheets welded to eachend. Intermediate tube support sheets positioned along the shell axis prevent relative tube motion. Individually-replaceable externally-finned and internally-grooved 19 mm (¾ in.) and 25.4 mm (1.0 in.) nominal diameter seamless copper tubes are mechanically expanded into tube sheets.

Two- or three- pass water boxes rated at 10.5 bar (150 psi) is standard. Grooved pipe connections are standard; ﬂ anged connections are optionally available. The waterside is hydrostatically tested at ASME 1.5 times, PED 1.43 times, GB 1.25 times maximum working pressure.

Liquid refrigerant is admitted to the evaporator through a single calibrated oriﬁ ce (no moving parts) which maintains a pressure differential between the economizer and the evaporator.

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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.