Liebert 3000 manual Load Control Features, Additional Features, Short Cycle Control

Page 42

System Performance with Advanced Microprocessor Controls

4.4Load Control Features

4.4.1Short Cycle Control

The control system monitors the compressor and prevents it from turning on within 3 minutes of being turned off. If this (on, off, on) occurs too often, 10 times in one hour, a Short Cycle alarm could occur.

4.4.2Sequential Load Activation Control

The control allows only one load output to be energized at a time on a restoration of power or micro- controller reset. Each additional load output will be activated at one second intervals until desired operating conditions have been met.

4.5Additional Features

4.5.1Connecting the Analog Sensors

The sensor inputs are factory set to accept a 4 - 20 mA signal. However, the inputs can be changed by removing the appropriate jumpers on the control circuit board. See Table 14, Figure 5 and Figure 6.

The user supplied analog sensors MUST have their own power supply. To reduce the effects of inter- ference from any noise source, the sensor input wiring should be shielded twisted pair and the shield tied to earth ground at one end.

Analog input terminals for field connections are factory wired to the microprocessor board if specified when ordered. Eight terminals are located in the field wiring compartment of the unit. Wire sensors to the terminals as follows:

Table 14 Analog input terminals

Terminal

Signal

 

 

41

Input #1 (+)

 

 

42

Input #1 (–)

 

 

43

Input #2 (+)

 

 

44

Input #2 (–)

 

 

45

Input #3 (+)

 

 

46

Input #3 (–)

 

 

47

Input #4 (+)

 

 

48

Input #4 (–)

 

 

Consult your Liebert supplier for a field installation kit to add these connections after unit delivery, if required.

Table 15 Additional connections available after unit delivery

 

Input #1

Input #2

Input #3

Input #4

 

 

 

 

 

4–20 mA

Jumper P50.1 & 2

Jumper P50.5 & 6

Jumper P50.9 &10

Jumper P50.13 &14

 

and P50.3 & 4

and P50.7 & 8

and P50.11 & 12

and P50.15 & 16

0–5 VDC

Jumper P50.1 & 2

Jumper P50.5 & 6

Jumper P50.9 & 10

Jumper P50.13 & 14

 

 

 

 

 

0–10 VDC

NO Jumper

NO Jumper

NO Jumper

NO Jumper

 

on P50.1 & 2

on P50.5 & 6

on P50.9 &10

on P50.13 & 14

 

and P50.3 & 4

and P50.7 & 8

and P50.11 & 12

and P50.15 & 16

34

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Contents Liebert Challenger Page Table of Contents Run Diagnostics Alarm Descriptions Component Operation and MaintenanceHumidifier Figures Page Glycool Chilled Glycol Cooling Systems System DescriptionsCompressorized Systems Chilled Water SystemsStart-Up Procedure Basics Advanced microprocessor control panelAdvanced microprocessor a control for Challenger Status/Alarm Data Status DisplayMain Menu MENU/ESC Run Hours Log Setpoints/SetupDefault setpoints and ranges Analog SensorsSetup System Setup OperationShow DIP Switches Select OptionsCalibrate Sensors Default Time Setup AlarmsAlarm default time delays Alarm Delay secondsStandard Custom Alarm Messages Humidity HUM Control MethodAnalog Setup Set Status DisplayCalibrate Actuator Test Outputs Run DiagnosticsShow Inputs Test Control BoardControl Circuit Board Change PasswordsDate and Time LCD Display ContrastControl Outputs DIP SwitchesNon-Volatile Memory 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 Setup Custom Alarms Setup Water Detect Floor PlanView Water Detect Floor Plan for Optional LTM1000/LT750 Operating Status System SetupCold Start Delay View/Set Control SetpointsIR Flush Overfill infrared humidifiers only Auto Restart DelayDefault Settings and Ranges 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 Setting options Plot GraphsModify Plot Scales Analog/Digital Inputs View Run Hours LogView 24 Hour Run Time History View Total Run HoursLCD Contrast Nonvolatile Memory Response to Control Types Proportional Control Temperature ControlCooling/Heating Required, in Percent % PID Control Chilled Water or SCR Reheats onlyChilled Water Cooling Glycool CoolingDual Cooling Source Cooling/dehumidification load status responseHot Water Reheat Humidity ControlHeating Operation Electric Reheat SCR Electric Reheat Requires Special Control SoftwareControl Types Humidification Operation System ActivationProportional Control Time between peaks x 5% Connecting the Analog Sensors Load Control FeaturesAdditional Features Short Cycle ControlWater Detection Display Installation-LT750 DIP Switch SettingsFault LT750 Environmental UnitSetup Physical ConnectionsCalibration Communications Liebert Monitoring Devices and SoftwareStandard Alarms Change FilterCompressor Overload Custom AlarmsHigh Temperature High Head PressureLoss of Power High Temperature and Low Temperature SimultaneouslyHumidifier Problem Infrared Humidifiers Low TemperatureOptional/Custom Alarms System Testing Water Detection Sensor FirestatSmoke Detector Liebert unit Recommended Liquitect location Floor drainRemote Shutdown Zone leak detection kit installation scenariosFilters Distance From UnitBelt Blower PackageFan Impellers and Bearings Air DistributionDischarge Pressure Refrigeration SystemSuction Pressure SuperheatAdjustment Thermostatic Expansion Valve OperationHot Gas Bypass Valve Operation Outdoor fan/condenser configuration Air Cooled CondenserWater/Glycol Cooled Condensers Coaxial Condenser Regulating ValveValve spring guide Glycol Solution Maintenance Adjusting Collar NutCompressor Replacement Compressor Functional CheckMechanical Failure Compressor Replacement Procedure Electrical FailureInfrared Humidifier Cleaning the PanHumidifier Removing the PanAutoflush Controls Autoflush Infrared Humidifier Cleaning SystemAutoflush Operation Steam Generating HumidifierOperation ControlsPart Capacity Number Voltage Lbs/hr kg/hr Replacing the CanisterHumidifier canister part numbers 200-460Circuit Board Adjustments Drain Tempering FeatureBlower troubleshooting Chilled water troubleshootingSymptom Possible Cause Check or Remedy Compressor and refrigeration system troubleshooting Compressor and refrigeration system troubleshooting Infrared humidifier troubleshooting Dehumidification troubleshootingGlycol pump troubleshooting See 6.4.8 Compressor Functional Check and TableSteam generating humidifier troubleshooting Reheat troubleshooting Compressor Filters Steam Generating HumidifierBlower Section Air Cooled Condenser if applicableGlycol Pump FiltersWater/Glycol Condenser if applicable Electrical PanelSemiannual Maintenance Inspection Checklist Page Ti n Ne tIti That
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3000 specifications

The Liebert 3000 is a cutting-edge power protection solution designed to provide reliable and efficient backup power for critical applications. This uninterruptible power supply (UPS) system is engineered to safeguard sensitive electronic equipment from power disturbances, ensuring uninterrupted operations in data centers, telecommunications, and industrial environments.

One of the standout features of the Liebert 3000 is its high-efficiency design. With an efficiency rating of up to 94%, the system minimizes energy loss, resulting in lower operational costs and a reduced carbon footprint. This is particularly important in today's environmentally conscious climate, as organizations strive to meet sustainability goals while maintaining top-tier performance.

The Liebert 3000 employs advanced technologies to enhance its functionality. It incorporates online double-conversion technology, which provides a continuous supply of clean and regulated power. This technology ensures that connected loads receive stable voltage and frequency, shielding them from voltage spikes, sags, and outages. Additionally, the UPS offers features such as automatic battery testing, which helps ensure peak battery performance and reliability.

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The system is equipped with comprehensive monitoring and management capabilities. The Liebert 3000 provides real-time data on power usage, battery status, and system performance, enabling facility managers to make informed decisions and proactively address potential issues. The integration of remote management tools allows for seamless monitoring from anywhere, providing peace of mind for operators.

Overall, the Liebert 3000 combines high efficiency, advanced technology, and flexible design to deliver a robust power protection solution. Its reliability and performance make it a preferred choice for organizations seeking to protect their critical infrastructure while enhancing operational efficiency and sustainability. As businesses continue to rely on technology for their everyday operations, the Liebert 3000 stands out as a dependable safeguard against the uncertainties of power quality.
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