Mechanical Specifications
General
Exposed metal surfaces are painted with
Compressor and Motor
The unit is equipped with a semi- hermetic,
The motor is a suction
Unit-Mounted Starter
The unit is supplied with a NEMA 1 type enclosure with top
Evaporator and Condenser Shells are carbon steel plate.The evaporator and condenser are designed, tested, and stamped in accordance with ASME Code for
All tube sheets are made of carbon steel; tubes are mechanically expanded into tube sheets and mechanically fastened to tube supports. Evaporator tubes are 1.0- inch (25.4 mm) diameter and condenser tubes are
(19.05 mm) diameter. Both types can be individually replaced. Standard tubes are externally finned, internally enhanced seamless copper with lands at all tube sheets.
All water pass arrangements are available with grooved connections (150 or 300 psig waterside). All connections may be either right- or
Refrigerant Circuit
An electronically controlled expansion valve is provided to maintain proper refrigerant flow.
Unit Controls (CH530)
The
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
•low oil flow
•critical sensor or detection circuit faults
•motor current overload
•high compressor discharge temperature
•lost communication between modules
•electrical distribution faults: phase loss, phase imbalance, or phase reversal
•external and local emergency stop
•starter transition failure
The panel also includes machine protection shutdown with automatic reset for the following correctable conditions:
•momentary power loss
•under/over voltage
•loss of evaporator or condenser water flow
When a fault is detected, the control system conducts more than 100 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.
Clear Language Display Panel
Data contained in available reports includes:
•Water and air temperatures
•Refrigerant levels and temperatures
•Oil pressure
•Flow switch status
•EXV position
•Head pressure control command
•Compressor starts and
•Line phase percent RLA, amps, and volts
All necessary settings and setpoints are programmed into the microprocessor- based controller via the operator interface.The controller is capable of receiving signals contemporaneously from a variety of control sources, in any combination, and priority order of control sources can be programmed.The control source with priority determines active setpoints via the signal it sends to the control panel. Control sources may be:
•the local operator interface (standard)
•a
•Generic BAS (optional points; control source not supplied)
•LonTalk
source not supplied)
•TraneTracer Summit™ system (interface optional)
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