Liebert 3000 manual Air Cooled Condenser, Outdoor fan/condenser configuration

Page 56

Component Operation and Maintenance

6.4.6Air Cooled Condenser

Restricted airflow through the condenser coil will reduce the operating efficiency of the unit and can result in high compressor head pressure and loss of cooling.

Clean the condenser coil of all debris that will inhibit air flow. This can be done with compressed air or commercial coil cleaner. Check for bent or damaged coil fins and repair as necessary. In winter, do not permit snow to accumulate around the sides or underneath the condenser.

Check all refrigerant lines and capillaries for vibration isolation. Support as necessary. Visually inspect all refrigerant lines for signs of oil leaks.

Checking Refrigerant Charge (Lee–Temp/Flood Back Head Pressure Control)

The system refrigerant level must be checked periodically. To do so:

1.Adjust temperature setpoint in the unit so that the compressor will run continuously.

2.The refrigerant level is visible through two sight glasses on the receiver and will vary with ambient temperature.

a.40°F (4.4°C) and lower — Midway on the bottom sight glass.

b.40 to 60°F (4.4 to 15.6°C) — Bottom sight glass should be clear with liquid.

c.60°F (15.6°C) and above — Midway on the top sight glass.

3.Return temperature setpoint to desired number.

Figure 9 Outdoor fan/condenser configuration

FAN SPEED CONDENSER

Electric service

 

supplied by others

* B

 

Hot gas line

 

Secure each leg to condenser

 

frame at all points shown using

 

hardware provided.

 

Liquid line

 

LEE-TEMP CONDENSER

 

Lee-Temp heater pad

* B

connection box

 

Hot gas line

 

Electric

 

service

 

supplied by

Liquid line

others

*B - Inverted traps are to be field-supplied and installed (typ). When installing traps, provide clearance for swing end of access door. Traps are to extend above base of coil by a minimum of 7-1/2" (190 mm).

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Contents Liebert Challenger Page Table of Contents Run Diagnostics Alarm Descriptions Component Operation and MaintenanceHumidifier Figures Page System Descriptions Compressorized SystemsGlycool Chilled Glycol Cooling Systems Chilled Water SystemsStart-Up Procedure Basics Advanced microprocessor control panelAdvanced microprocessor a control for Challenger Main Menu MENU/ESC Status/Alarm DataStatus Display Setpoints/Setup Default setpoints and rangesRun Hours Log Analog SensorsSetup System Setup OperationCalibrate Sensors Show DIP SwitchesSelect Options Setup Alarms Alarm default time delaysDefault Time Alarm Delay secondsStandard Custom Alarm Messages Humidity HUM Control MethodCalibrate Actuator Analog SetupSet Status Display Run Diagnostics Show InputsTest Outputs Test Control BoardChange Passwords Date and TimeControl Circuit Board LCD Display ContrastDIP Switches Non-Volatile MemoryControl Outputs Control output LEDsOperation with Advanced Microprocessor with Graphics Control Advanced microprocessor with graphics control menu View/Set Alarms See 3.7.7 Set Status DisplaySetup Alarms View Water Detect Floor Plan for Optional LTM1000/LT750 Setup Custom AlarmsSetup Water Detect Floor Plan System Setup Cold Start DelayOperating Status View/Set Control SetpointsAuto Restart Delay Default Settings and RangesIR Flush Overfill infrared humidifiers only Chilled Water/Hot Water/Econ-O-Coil FlushCalibrate Valve Actuator Select Control Algorithm Chilled Water and SCR Reheats onlyRun Diagnostics Select Humidity Sensing ModeShow Inputs Modify Plot Scales Setting optionsPlot Graphs Analog/Digital Inputs View Run Hours LogLCD Contrast View 24 Hour Run Time HistoryView Total Run Hours Nonvolatile Memory Temperature Control Cooling/Heating Required, in Percent %Response to Control Types Proportional Control PID Control Chilled Water or SCR Reheats onlyGlycool Cooling Dual Cooling SourceChilled Water Cooling Cooling/dehumidification load status responseHumidity Control Heating Operation Electric ReheatHot Water Reheat SCR Electric Reheat Requires Special Control SoftwareProportional Control Control TypesHumidification Operation System Activation Time between peaks x 5% Load Control Features Additional FeaturesConnecting the Analog Sensors Short Cycle ControlInstallation-LT750 DIP Switch Settings FaultWater Detection Display LT750 Environmental UnitCalibration SetupPhysical Connections Communications Liebert Monitoring Devices and SoftwareStandard Alarms Change FilterCustom Alarms High TemperatureCompressor Overload High Head PressureHigh Temperature and Low Temperature Simultaneously Humidifier Problem Infrared HumidifiersLoss of Power Low TemperatureOptional/Custom Alarms System Testing Firestat Smoke DetectorWater Detection Sensor Liebert unit Recommended Liquitect location Floor drainZone leak detection kit installation scenarios FiltersRemote Shutdown Distance From UnitBlower Package Fan Impellers and BearingsBelt Air DistributionRefrigeration System Suction PressureDischarge Pressure SuperheatHot Gas Bypass Valve Operation AdjustmentThermostatic Expansion Valve Operation Outdoor fan/condenser configuration Air Cooled CondenserValve spring guide Water/Glycol Cooled Condensers Coaxial CondenserRegulating Valve Glycol Solution Maintenance Adjusting Collar NutMechanical Failure Compressor ReplacementCompressor Functional Check Compressor Replacement Procedure Electrical FailureCleaning the Pan HumidifierInfrared Humidifier Removing the PanAutoflush Infrared Humidifier Cleaning System Autoflush OperationAutoflush Controls Steam Generating HumidifierOperation ControlsReplacing the Canister Humidifier canister part numbersPart Capacity Number Voltage Lbs/hr kg/hr 200-460Circuit Board Adjustments Drain Tempering FeatureSymptom Possible Cause Check or Remedy Blower troubleshootingChilled water troubleshooting Compressor and refrigeration system troubleshooting Compressor and refrigeration system troubleshooting Dehumidification troubleshooting Glycol pump troubleshootingInfrared humidifier troubleshooting See 6.4.8 Compressor Functional Check and TableSteam generating humidifier troubleshooting Reheat troubleshooting Filters Steam Generating Humidifier Blower SectionCompressor Air Cooled Condenser if applicableFilters Water/Glycol Condenser if applicableGlycol Pump Electrical PanelSemiannual Maintenance Inspection Checklist Page Ne t ItiTi n That
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3000 specifications

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