Trane CGWF, CCAF manual Mechanical Specifications

Page 38

Mechanical Specifications

General

All scroll chillers are factory tested and monitored for power and control operation (CGWF only). CGWF units ship with a full operating charge of refrigerant and oil. CCAF units ship with a full operating charge of oil. Exposed surfaces are painted with an air-dry beige primer-finisher prior to shipment.

Compressor-Motor

Direct-drive, hermetic, 3600 rpm, 60 Hz [3000 rpm, 50 Hz] fixed compression, scroll compressors (20 to 30 tons - two compressors; 40 to 60 tons - four compressors). Each compressor has: centrifugal oil pump, oil level sightglass, oil charging valve, two point lubrication for each motor bearing, flooded lubrication for the journal and thrust bearings, and a check valve on the scroll discharge port.

Motor is suction gas-cooled, hermetically sealed, two-pole, squirrel cage induction type.

Evaporator

Shell and tube design with seamless copper tubes roller expanded into tube sheets. Designed, tested and stamped in accordance with ASME Code for refrigerant side working pressure of 300 psig. Water side working pressure is 300 psig for CGWF 20-50 and CCAF 20-60, 215 psig for CGWF 60. One water pass with a series of internal baffles. Each shell includes drain connections, entering and leaving temperature sensors, and ¾ inch Armaflex II (or equal) insulation (K= 0.26).

Condenser (CGWF only)

Shell and tube design with seamless internally enhanced copper tubes. Designed, tested and stamped in accordance with ASME Code (CGWF 60 only) the refrigerant side working pressure of 450 psig. Water side working pressure is 300 psig for CGWF 20-50, 150 psig for CGWF 60. Two pass construction with six-inch diameter shell (20 to 30 tons). One pass construction with two separate condensers connected in series (40 to 60 tons). Each condenser includes a subcooler circuit. Tubes are cleanable and replaceable.

Refrigerant Circuit

Each refrigeration circuit shall be completely independent and shall include liquid line and discharge line service valves, filter dryer, combination moisture indicator-sightglass, charging port, insulated suction line, liquid line solenoid valve and thermal expansion valve.

Isolation valves provide means of isolating refrigerant charge in either the high or low pressure side while servicing. One refrigerant circuit on

20 to 30 tons; two refrigerant circuits on

40 to 60 tons.

Condenserless units (CCAF) shall be equipped with discharge check valve and moisture indicator sightglass.

Unit Controls (CH530)

The microprocessor-based control panel is factory-installed and factory-tested. Chilled water reset based on return water is standard.

The CH530 microprocessor automatically acts to prevent unit shutdown due to abnormal operating conditions associated with low evaporator refrigerant temperature, high condensing temperature, and/or motor current overload. If an abnormal operating condition continues and the protective limit is reached, the machine should shut down.

The panel includes machine protection shutdown requiring manual reset for the following conditions:

•low evaporator refrigerant temperature and pressure

•high condenser refrigerant pressure

•critical sensor or detection circuit faults

•motor current overload

•high compressor discharge temperature

•lost communication between main processor and LLID

•electrical distribution faults: current loss or phase reversal

•external and local emergency stop

•starter contactor interrupt failure

The panel also includes machine protection shutdown with automatic reset for the following correctable conditions:

•power loss

•loss of evaporator or condenser water flow

When a fault is detected, the control system conducts more than 60 diagnostic checks and displays results. The display will identify the fault, indicate date, time, and operating mode at time of occurrence, and provide type of reset required and a help message. The diagnostic history will display the last ten diagnostics with their times and dates of occurrence.

38

CG-PRC012-EN

Page 37 Page 39
Image 38
Page 37 Page 39
Contents Scroll Liquid Chillers Introduction Contents Build To Order Features BenefitsEasy Serviceability Single-Source ResponsibilityScroll Chiller Energy Usage Savings Operating TorqueCompression-Second Orbit GeneralInlet-First Orbit Discharge-Third OrbitFeatures Benefits Options OptionsHuman Interfaces Safety ControlsControls Standalone ControlsProgrammable Relays and Alarms Chiller Enable/DisableChiller Hardwire Inputs Include Easy Interface to a Generic Building Management SystemExternal Trane Devices Required Additional Features That May Be UsedRequired Options Swift Emergency Response Energy EfficiencyKeeping Operators Informed Easy Documentation for Regulatory ComplianceWater Pumps Unit LocationWater Treatment Remote CondenserModel Number Description Table GD-2. General data Ccaf compressor chiller General DataTable GD-1. General data Cgwf water-cooled chiller Scroll Liquid Chiller Cgwf Selection Example Compressor Chiller Ccaf Selection ExampleTable PD-1 Hz Cgwf performance data in English units PerformanceData Table PD-2 Hz Cgwf performance data in Metric units COPTable PD-3 Hz Cgwf performance data in English units Table PD-4 Hz Cgwf performance data in Metric units Table PD-7 Hz Ccaf performance data in English units Table PD-8 Hz Ccaf performance data in English units Table PD-9 Hz Ccaf performance data in Metric units Part Load Performance Adjustment Figure PAF-1. Ethylene glycol performance adjustment factorsTable PAF-2. Pressure drop correction factor Chart PD-1. Cgwf evaporator Chart PD-2. Cgwf condenser Electrical Data Connections Table E-1. Electrical data for Cgwf water-cooled chillersElectrical Data Connections Electrical Data Connections Field Layout Electrical Data Connections Field Layout Dimensional Cgwf 40-50 Ton Dimensional Data Ccaf 20-30 Ton Ccaf 40-60 Ton Table W-2. Weights, Ccaf compressor chillers WeightsTable W-1. Weights, Cgwf chillers Mechanical Specifications Starter Trane

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