IPCX Chillers - Dunham-Bush Americas

More documents

Recommendations

Info

DESIGN FEATURES: MICROCOMPUTER CONTROL○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○Advanced Microcomputer Control is a standard featureon allRotary Screw <strong>Chillers</strong>monitoring analog and digital inputs to achieve precisecontrol of the major operational and protectivefunctions of the unit.Direct digital control (DDC) allows fingertip userinteraction. Its simple-to-use push button keyboard andmenu-driven software provide access to operatingconditions, control setpoints and alarm history clearlydisplayed on a prominent multi-line 80 characteralphanumeric display.An easy-to-install, inexpensive modem option allowsremote reading of operating parameter updates. Themicrocomputer insures its ownerstate-of-the-art efficiency and reliability.Display InformationThe 80 character alphanumeric liquid crystal displayutilizes easy-to-understand menu-driven software.Inexperienced operators can quickly work through thesemenus to obtain the information they require or tomodify control parameters. More experienced operatorscan bypass the menu systems, if desired, and movedirectly to their requested control function. At all times,assistance is available to the operator by simply pressingthe help key. Easily accessible measurements include:• Entering and Leaving chilled fluid temperature• Suction pressure and temperature• Discharge pressure and temperature• Oil pressure and temperature• Compressor motor amp draw• Compressor elapsed run time• Percent of slide valve loading• Reservoir oil temperature• Fluid temperature reset value• Demand limit reset value• Compressor starter status• Oil pump starter status• Fluid flow switch status• External start / stop command statusCapacity ControlLeaving chilled water temperature control isaccomplished by entering the leaving water temperaturesetpoint and placing the microcomputer in automaticcontrol. The unit will monitor all control functions andmove the slide valve to the required operating position.The compressor ramp (loading) cycle is programmableand may be set for specific building requirements.Remote adjustment of the leaving chilled water setpointis accomplished through either direct connection viaterminal or modem connected to the RS232communication port, or from an external BuildingAutomation System supplying a simple 0 to 5 VDCsignal. Remote reset of compressor current limit maybe accomplished in a similar fashion.System ControlThe unit may be started or stopped manually, or throughthe use of an external signal from a Building AutomationSystem. In addition, the microcomputer may beprogrammed with a seven-day operating cycle or othercontrol packages may start and stopthe system through inter-connecting wiring.Optional watering temperature monitoring (WTM) forentering and leaving condenser water temperature isavailable. With this option the operator can quicklyand accurately read the water temperatures andeliminate the need for thermometers.14
DESIGN FEATURES: MICROCOMPUTER CONTROL (CONT.)○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○System ProtectionThe following system protection controls willautomatically act to insure system reliability:• Low suction pressure• High discharge pressure• Low oil pressure• Freeze protection• High oil temperature• Compressor starter failure• Oil pump starter failure• Compressor run error• Power loss• Chilled water flow loss• Sensor error• Compressor overcurrent• Anti-recycleAlarm HistoryThe microcomputer retains the latest eight alarm conditionscomplete with time of failure in its alarm history.This tool aids service technicians in troubleshootingtasks enabling downtime and nuisance trip-outs to beminimized.Remote Monitoring CapabilityThe microcomputer is complete with an RS232communications port and all hardware and softwarenecessary to remotely monitor and control the packagedchiller up to 50 feet away (hard wired) or by optionalphone modem for extended distances by the phonesystem. This valuable enhancement to the chiller systemallows the ultimate in serviceability. The microcomputeris equipped with history files as standard which recordsa history that may be retrieved via the phone modemperiodically. Now owners of multiple buildings have asimple and inexpensive method of investigatingpotential problems quickly and in a highly cost effectivemanner.Remote Monitoring and OperatingTerminalsThere are four methods of remote monitoring andoperating our package chillers.1) RMDT - Remote Monitor DisplayTerminalThe RMDT (Remote Monitor Display Terminal) can behard wired up to 50 feet away from the chiller orconnected thru a modem for remote monitoring andoperating of up to three chillers. The RMDT is suppliedwith a 14" monitor, two RS232 serial ports, a 6 foot115 volt power cord and an enhanced PC keyboard.This option allows remote start-stop, chilled water setpointchanges, and reading of all microcomputerscreens including operating conditions, faults and faulthistory.2) IBM PC Compatible Computer TerminalA customer's IBM PC Compatible computer withcommunication software installed (simple terminal) caninterface with the chiller in the same manner as theRMDT (Remote Monitor Display Terminal). Again, thismethod of communication interfaces with the chillermicrocomputer CPU and provides the same level ofcommunication.3) BMS - Building Management SystemTerminalA BMS (Building Management Systems) may interfacewith the chiller microcomputer and provide the samelevel of monitoring and operating control as above,when the BMS company has implemented thecommunications protocol.has an open communicationsprotocol policy with most BMS companies.15
Page 1 and 2: ○ ○ ○ ○ ○ ○ ○ ○ ○
Page 4: UNIT FEATURES AND OWNER BENEFITS○
Page 7: DESIGN FEATURES: DIRECT DRIVE TWIN-
Page 11: UNIT FEATURES: CONTROL & STARTER PA
Page 17 and 18: DESIGN FEATURES: PART-LOAD PERFORMA
Page 19 and 20: OPTIONS (CONT.)○ ○ ○ ○ ○
Page 21 and 22: INSTALLATION DATA (CONT.)○ ○
Page 23 and 24: APPLICATION DATA (CONT.)○ ○ ○
Page 25 and 26: QUICK SELECTIONS AT A GLANCE○ ○
Page 27 and 28: DIMENSIONAL DATA (CONT.)○ ○ ○
Page 29 and 30: DIMENSIONAL DATA (CONT.)○ ○ ○
Page 31 and 32: TYPICAL PIPING SCHEMATIC (CONT.)○
Page 33 and 34: TYPICAL CONTROL WIRING DIAGRAM (CON
Page 35 and 36: STARTER CONNECTION REQUIREMENTS○
Page 38 and 39: 1.08 WarrantyA. The equipment suppl
Page 40 and 41: B. A microcomputer-based controller
Page 43 and 44: Under voltage relayCurrent transfor

IPCX Chillers - Dunham-Bush Americas

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?