Application Considerations

Unit Location

Units should be installed indoors where exposure to rain or water splash is minimal. A level foundation or flooring must be provided which will support at least 150 percent of the operating weight of the unit. The chiller foundation must be rigid to reduce vibration transmission to a minimum. Use of vibration isolators is recommended for applications with sensitive vibration and noise criteria.

Allow service clearance for compressor removal as well as evaporator and condenser tube removal.

Condenser Water Limitations Water-cooled scroll chillers start and operate satisfactorily over a range of load conditions with uncontrolled entering water temperature.

Reducing the condenser water temperature is an effective method of lowering the power input required. However, by reducing the condenser water temperature beyond certain limits, the effect causes a reduction in the pressure drop across the thermal expansion valve to a point when system instability may occur.

In general, continuous machine operation with entering condenser water temperature below 60°F [15.5°C] is not recommended. When the condenser water temperature is expected to drop below 60°F [15.5°C], it is recommended that some form of condenser water temperature control be used to ensure optimal machine performance.

Water Treatment

Use of untreated or improperly treated water in chillers may result in scaling, erosion, corrosion, algae or slime. It is recommended that the services of a qualified water treatment specialist be engaged to determine what treatment, if any, is advisable. Trane assumes no responsibility for the results of untreated, or improperly treated water.

Water Pumps

Avoid specifying or using 3600 rpm, 60 Hz [3000 rpm, 50 Hz] condenser water and chilled water pumps. Such pumps may operate with objectional noise and vibration. In addition, a low frequency beat may occur due to the slight difference in operating rpm between water pumps and scroll compressor motors. Where noise and vibration-free operation is important, Trane encourages the use of 1750 rpm, 60 Hz [1450 rpm, 50 Hz] pumps.

Remote Condenser

Remote condensers should be located as close as possible to the chiller to ensure minimum pressure drops of discharge refrigerant. If non-Trane condensers are provided, a subcooling circuit must be provided in order to achieve cataloged performances (16°F [-8.9°C] subcooling).

12

CG-PRC012-EN

Page 11 Page 13
Page 12
Image 12
Trane CGWF, CCAF manual Unit Location, Water Treatment, Water Pumps, Remote Condenser
Page 11 Page 13

CCAF, CGWF specifications

The Trane CGWF and CCAF series are notable advancements in the field of commercial air conditioning and heating solutions. Designed to provide efficient climate control, these units are favored for their reliability, energy efficiency, and innovative technologies.

The Trane CGWF series is characterized by its water-cooled chiller design, making it suitable for a variety of commercial applications. Its primary feature is the use of the eco-friendly refrigerant R-134a, which not only minimizes environmental impact but also complies with evolving regulations regarding refrigerants. The CGWF models are equipped with high-efficiency scroll compressors, which contribute to reduced energy consumption while ensuring optimal performance.

The Series also boasts a range of cooling capacities, making it adaptable to various building sizes and requirements. The intelligent control systems embedded within the CGWF units allow for precise monitoring and adjustment of temperature settings, contributing to stable indoor conditions. Additionally, these chillers feature a robust construction that enhances durability, ensuring long-life service in demanding environments.

On the other hand, the Trane CCAF series reflects an advanced approach to air handling. These units are built with focus on energy efficiency as well, featuring the latest in variable frequency drive (VFD) technology. VFDs enable the system to adjust motor speed according to load requirements, resulting in significant energy savings and lower operational costs. The CCAF series also incorporates advanced filtration options, which improve indoor air quality by ensuring that particulates and contaminants are effectively removed from the air.

A notable characteristic of the CCAF models is their modular design, allowing for easy installation and maintenance. The plug-and-play configuration simplifies the setup, accommodating various spaces without requiring extensive modifications. Furthermore, both the CGWF and CCAF series support connectivity with advanced building management systems, facilitating real-time monitoring and control through smart technology.

In summary, the Trane CGWF and CCAF units stand out for their exceptional efficiency, cutting-edge technology, and flexibility in application. Their design and features reflect a commitment to sustainability and innovation, making them a compelling choice for businesses looking to optimize their HVAC systems while meeting contemporary environmental standards. With Trane’s reputation for quality and reliability, these series are trusted solutions for commercial climate control needs.
Top Page Image Contents