Liebert Challenger 3000

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Operation with Advanced Microprocessor ControlsTable 2 lists the setup functions, their factory default values and the allowable programming ranges.Table 2Setup functions, default values and rangesFunction Default RangeCold Start Time Delay* 3 0 to 3 min (0 = no delay)Restart Time Delay 0.1 0 to 9.9 min (0 = manual restart)Infrared Fill Rate 150 110 to 500%Chilled/Hot Water Coil Flush 24 0 to 99 hrs (also Econ-O-Coil)C/F Degrees F C or F*Factory set to 0 for water cooled, glycol, and GLYCOOL units.Select OptionsThe following table lists options which should match the options installed with your unit and shouldnot need to be changed during normal operation.Table 3Unit optionsOption SelectionHeating 1Yes or NoHumidifierYes or NoDehumidifier Yes or NoHot Gas Reheat 2 Yes or NoHeat Stages 3 21 Heating cannot be disabled on units with SCR reheats.2 Hot gas reheat not available on units with SCR reheats.3 Heat stages not selectable on units with SCR reheats.Calibrate SensorsThe temperature and humidity sensors can be calibrated by selecting this menu item. “SENSOR”shows the actual sensor reading or raw reading. “CALIBRATED” shows the sensor reading after thecalibration offset has been added. The temperature sensor can be calibrated ±5 degrees Fahrenheitand the humidity sensor can be calibrated ±10%RH. When calibrating the humidity sensor, the valueshown will always be % RH, even though absolute humidity control may be selected. If absolutehumidity control is selected, the Normal Status Display will display the adjusted reading and may notagree with the relative humidity reading displayed while in calibration.Show DIP SwitchesThe DIP switch settings can be reviewed from the display panel. Changing the DIP switches requiresopening the upper panel for access to the DIP switches on the microprocessor control board.NOTEPower MUST be cycled OFF, then ON from the unit disconnect switch for the controlsystem to update the DIP switch settings (with the exception of switch 8).Table 4DIP switch settingsSwitch # Off On1 No Part Coil Part Coil/Chilled Water2 Electric/Hot Gas Reheat Hot Water Reheat3 All Not Used4 No GLYCOOL GLYCOOL5 No Dual Cooling Dual Cooling6 Not Used Not Useda7 a Tight Control Standard ControlSCR reheats only (with special software); otherwise, not used.The selections shown in Table 4 should match options installed on your unit and should not need tochange during normal operation. Switches 1 through 7 are self explanatory. DIP switch 8, not shown in thetable, enables the password feature when set to ON and disables the password feature when set to OFF.8
Operation with Advanced Microprocessor ControlsSelect Control Type• Intelligent (Chilled Water only)• Proportional (all unit types)• Tunable PID (Chilled Water or SCR Reheats only)The type of system control method used by the microprocessor can be selected from the front panel.The default setting is Intelligent, which approximates the actions that a human operator would taketo maintain precise, stable control. The control logic uses Artificial Intelligence techniques including“fuzzy logic” and “expert systems” methods to maintain precise, stable control and increase reliabilityby reducing component cycles. Proportional is a standard control method that uses one gain factor(temperature sensitivity adjustment). Tunable PID (Proportional, Integral, and Derivative) usesthree gain factors selected by the operator. PID allows precision tuning, but requires an experiencedoperator and seasonal adjustments. Note that if PID is selected, it is used for temperature controlwhile humidity will continue to use Proportional control. Refer to 4.0 - System Performance withAdvanced Microprocessor Controls for more detail on types of controls.Setup AlarmsSelecting SETUP ALARMS will step to the following menu:•SET TIME DELAYS• ENABLE ALARMS• ENABLE COMMON ALARM• SET CUSTOM ALARMSEach individual alarm can be programmed with a time delay from 0 to 255 seconds. Each individualalarm can be ENABLED or DISABLED and each individual alarm can be programmed to energize ornot to energize the Common Alarm Relay.Set Time Delays—By programming a time delay for an alarm, the system will delay the specifiedamount of time before recognizing the alarm. The alarm condition must be present for the amount oftime programmed for that alarm before it will be annunciated. If the alarm condition goes awaybefore the time delay has timed out, the alarm will not be recognized and the time delay timer will bereset. For software alarms such as Loss of Power, Short Cycle, and Low Suction Pressure, a timedelay will only delay the annunciation of that alarm. The condition of the alarm is not applicablebecause the condition has already occurred. For these alarms the time delay should be left at the factorydefault of 0. Table 5, below, shows the default time delays for each alarm.Table 5 Alarm default time delaysDefault TimeAlarmDelay (seconds)Humidifier Problem 2High Head Pressure 2Change Filter 2Loss of Air flow 3Custom Alarm #1 0Custom Alarm #2 0Custom Alarm #3 0Custom Alarm #4 6High Temperature 30Low Temperature 30High Humidity 30Low Humidity 30Low Suction Pressure 0Short Cycle 0Compressor Overload 2Main Fan Overload 5Loss of Power 09
Page 1: Precision CoolingFor Business-Criti
Page 4 and 5: 3.7.1 Setup Operation . . . . . . .
Page 9 and 10: Introduction1.0 INTRODUCTION1.1 Sys
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Page 13 and 14: 2.2 Status DisplayOperation with Ad
Page 15: 2.5.2 Setup SystemThe Setup System
Page 19 and 20: Analog SetupOperation with Advanced
Page 21 and 22: 2.5.4 Change PasswordsOperation wit
Page 23 and 24: Operation with Advanced Microproces
Page 25 and 26: 3.2 Status DisplayOperation with Ad
Page 27 and 28: 3.4.4 Setup Custom AlarmsSelecting
Page 29 and 30: Auto Restart DelayOperation with Ad
Page 31 and 32: 3.7.6 Select Humidity Sensing ModeO
Page 33 and 34: 3.8.4 DIP SwitchesOperation with Ad
Page 35 and 36: 3.12.1 View 24 Hour Run Time Histor
Page 37 and 38: System Performance with Advanced Mi
Page 45 and 46: 4.6 CommunicationsSystem Performanc
Page 47 and 48: 5.1.2 Compressor OverloadAlarm Desc
Page 49 and 50: 5.1.16 Short CycleAlarm Description
Page 51 and 52: FirestatComponent Operation and Mai
Page 53 and 54: 6.3 Blower PackageComponent Operati
Page 55 and 56: 6.4.4 Thermostatic Expansion ValveO
Page 57 and 58: 6.4.7 Water/Glycol Cooled Condenser
Page 59 and 60: 6.4.8 Compressor Functional CheckCo
Page 61 and 62: Component Operation and Maintenance
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Table 23Compressor and refrigeratio
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Table 24No dehumidificationTable 25
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Table 27Excessive arcing in thecani
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9.0 SEMIANNUAL MAINTENANCE INSPECTI
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Ensuring The High Availability0f Mi
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Liebert Challenger 3000

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