Trane CVGF manual Mechanical Specifications, Condenser, Unit Control Panel

Mechanical Specifications

Condenser

The condenser is designed, tested and stamped in accordance with the ASME Boiler and Pressure Vessel Code or PED (European Code) for a refrigerant side working pressure of 15.2 bars (220 psig). It consists of a carbon steel shell with steel tube sheets welded to each end. Individually- replaceable, externally-fi nned and internally-grooved 19 mm(¾ in.) and 25.4 mm (1.0 in.) nominal diameter seamless copper tubes are mechanically expanded into the tubesheets.

Two-pass water boxes are bolted to the tube sheets. Grooved pipe connections are standard.

flanged connections are optionally available. Maximum waterside working pressureof 10.5 bars (150 psi) is standard. The waterside is hydrostatically tested at ASME 1.5 times, PED 1.43 times, GB 1.25 times maximum working pressure.

Unit Control Panel

The microcomputer control panel is factory installed and tested on the CVGF unit. All controls necessary for the safe and reliable operation of the chiller are provided including oil management, interface to the starter, and three phase motor overload protection. It also includes comprehensive status and diagnostic monitoring controls. A control power transformer included in the starter panel powers the control system.

The microprocessor controller is compatible with reduced voltage or full voltage electro-mechanical starters, and solid state starter. Starter for Europe with the CE mark is available.

The microcomputer control system processes the leaving evaporator fluid temperature sensor signal to satisfy the system requirements across the entire load range.

The controller will load and unload the chiller via control of the stepper- motor/actuator which drives the inlet guide vanes open and closed. The load range can be limited either by a control limitor or by an inlet guide vane limit (whichever controls the lower limit). It will also control the evaporator and condenser pumps to insure proper chiller operation.

Status and 10 active diagnostics are communicated to the operator via display with a tabbed navigation system. Setpoints are entered through the touch-sensitive screen. Countdown timer displays remaining time(s) during wait states and time out periods. Non-volatile memory saves unit set-up information during power loss without the need for batteries. Password protection is provided to secure the operator interface. PC-based service tool software displays the last 60 active or 60 historic diagnostics, indicating the time, date of occurrence, and system parameters at the time of the diagnostic.

The service tool provides advanced troubleshooting and access to sophisticated configuration settings not needed during operation of the chiller. Any PC that meets the installation requirements may be loaded with the service tool software via download from www.trane.com.

Unit mounted display is capable of displaying chiller parameters in IP or SI units, and language in English and any 2 downloadable and/or locally translated languages.

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