Document Outline

• 1.0 Introduction
  • 1.1 System Descriptions
    • 1.1.1 Compressorized Systems
    • 1.1.2 GLYCOOL™ (Chilled Glycol Cooling) Systems
    • 1.1.3 Chilled Water Systems
  • 1.2 Start-Up Procedure
• 2.0 Operation with Advanced Microprocessor Controls
  • 2.1 Basics
    • Figure 1 Advanced microprocessor control panel
    • Figure 2 Advanced microprocessor (A) control for Challenger 3000
  • 2.2 Status Display
  • 2.3 Main Menu <MENU/ESC>
  • 2.4 Status/Alarm Data
    • 2.4.1 Active Alarms
    • 2.4.2 Operating Status
    • 2.4.3 Alarm History Log
    • 2.4.4 Run Hours Log
    • 2.4.5 Analog Sensors
  • 2.5 Setpoints/Setup
    • 2.5.1 View Setpoints
      • Table 1 Default setpoints and ranges
    • 2.5.2 Setup System
      • Setup Operation
        • Table 2 Setup functions, default values and ranges
      • Select Options
        • Table 3 Unit options
      • Calibrate Sensors
      • Show DIP Switches
        • Table 4 DIP switch settings
      • Select Control Type
      • Setup Alarms
        • Table 5 Alarm default time delays
      • Humidity (HUM) Control Method
      • Analog Setup
      • Set Status Display
      • Calibrate Actuator
    • 2.5.3 Run Diagnostics
      • Show Inputs
      • Test Outputs
      • Test Control Board
    • 2.5.4 Change Passwords
  • 2.6 Date and Time
  • 2.7 Status Display
  • 2.8 Control Circuit Board
    • 2.8.1 LCD Display Contrast
    • 2.8.2 Non-Volatile Memory
    • 2.8.3 DIP Switches
    • 2.8.4 Control Outputs
      • Table 6 Control output LEDs
• 3.0 Operation with Advanced Microprocessor with Graphics Control
  • 3.1 Basics
    • Figure 3 Advanced microprocessor with graphics (G) control panel
    • Figure 4 Advanced microprocessor with graphics control menu
  • 3.2 Status Display
  • 3.3 Main Menu <MENU/ESC>
  • 3.4 View/Set Alarms
    • 3.4.1 Active Alarms
    • 3.4.2 Alarm History Log
    • 3.4.3 Setup Alarms
      • Table 7 Alarm default time delays
    • 3.4.4 Setup Custom Alarms
    • 3.4.5 View Water Detect Floor Plan (for Optional LTM1000/LT750)
    • 3.4.6 Setup Water Detect Floor Plan
  • 3.5 Operating Status
  • 3.6 View/Set Control Setpoints
    • Table 8 Default setpoints and ranges
  • 3.7 System Setup
    • 3.7.1 Setup Operation
      • Cold Start Delay
      • Auto Restart Delay
      • IR Flush Overfill (infrared humidifiers only)
      • Chilled Water/Hot Water/Econ-O-Coil Flush
      • Display in Degrees
      • Default Settings and Ranges
        • Table 9 Setup functions, default values and ranges
    • 3.7.2 Select Options
      • Table 10 Unit options
    • 3.7.3 Calibrate Sensors
    • 3.7.4 Calibrate Valve Actuator
    • 3.7.5 Select Control Algorithm (Chilled Water and SCR Reheats only)
    • 3.7.6 Select Humidity Sensing Mode
    • 3.7.7 Set Status Display
    • 3.7.8 Change Passwords
  • 3.8 Run Diagnostics
    • 3.8.1 Show Inputs
    • 3.8.2 Test Outputs
    • 3.8.3 Test Control Board
    • 3.8.4 DIP Switches
      • Table 11 Setting options
  • 3.9 Date and Time
  • 3.10 Plot Graphs
    • 3.10.1 Modify Plot Scales
  • 3.11 Analog/Digital Inputs
    • 3.11.1 Read Analog Inputs
    • 3.11.2 Setup Analog Inputs
      • Slope
      • Intercept
      • Text
    • 3.11.3 Read Digital Inputs
    • 3.11.4 Setup Digital Inputs
  • 3.12 View Run Hours Log
    • 3.12.1 View 24 Hour Run Time History
    • 3.12.2 View Total Run Hours
  • 3.13 Control Circuit board
    • 3.13.1 LCD Contrast
    • 3.13.2 Nonvolatile Memory
    • 3.13.3 DIP Switches
    • 3.13.4 Control Outputs
      • Table 12 Control output LEDs
• 4.0 System Performance with Advanced Microprocessor Controls
  • 4.1 Temperature Control
    • 4.1.1 Cooling/Heating Required, in Percent (%)
    • 4.1.2 Response to Control Types
      • Proportional Control
      • PID Control (Chilled Water or SCR Reheats only)
      • Intelligent Control (Chilled Water only)
    • 4.1.3 Cooling Operation
      • 1-Step Cooling, Compressorized Direct Expansion (DX) Systems
      • 2-Step Cooling, Compressorized Direct Expansion (DX) Systems with Part Coil (optional)
        • Table 13 Cooling/dehumidification load status response
      • GLYCOOL Cooling
      • Dual Cooling Source
      • Chilled Water Cooling
    • 4.1.4 Heating Operation
      • Electric Reheat
      • Hot Water Reheat
      • SCR Electric Reheat (Requires Special Control Software)
  • 4.2 Humidity Control
    • 4.2.1 Dehumidification/Humidification Required, in Percent
    • 4.2.2 Response to Control Types
      • Proportional Control
      • PID Control (Chilled Water or SCR Reheats only)
      • Intelligent Control (Chilled Water only)
    • 4.2.3 Dehumidification Operation
      • 1-Stage Dehumidification, Compressorized Direct Expansion (DX) Systems
    • 4.2.4 Humidification Operation
      • System Activation
  • 4.3 Control Types
    • 4.3.1 Proportional Control
    • 4.3.2 PID Control (Chilled Water or SCR Reheats only)
    • 4.3.3 Intelligent Control (Chilled Water only)
  • 4.4 Load Control Features
    • 4.4.1 Short Cycle Control
    • 4.4.2 Sequential Load Activation Control
  • 4.5 Additional Features
    • 4.5.1 Connecting the Analog Sensors
      • Table 14 Analog input terminals
      • Table 15 Additional connections available after unit delivery
      • Figure 5 Analog input jumpers
    • 4.5.2 Water Detection Display
      • Installation-LT750 DIP Switch Settings
        • Figure 6 Connecting the LT750
      • Physical Connections
      • Setup
      • Calibration
  • 4.6 Communications
    • Liebert Monitoring Devices and Software
• 5.0 Alarm Descriptions
  • 5.1 Standard Alarms
    • 5.1.1 Change Filter
    • 5.1.2 Compressor Overload
    • 5.1.3 Custom Alarms
    • 5.1.4 High Head Pressure
    • 5.1.5 High Humidity
    • 5.1.6 High Humidity and Low Humidity (Simultaneously)
    • 5.1.7 High Temperature
    • 5.1.8 High Temperature and Low Temperature (Simultaneously)
    • 5.1.9 Humidifier Problem
      • Infrared Humidifiers
      • Steam Generating (Canister) Humidifiers
    • 5.1.10 Loss of Air Flow
    • 5.1.11 Loss of Power
    • 5.1.12 Low Humidity
    • 5.1.13 Low Suction Pressure
    • 5.1.14 Low Temperature
    • 5.1.15 Main Fan Overload
    • 5.1.16 Short Cycle
  • 5.2 Optional/Custom Alarms
    • 5.2.1 Loss of Water Flow
    • 5.2.2 Smoke Detected
    • 5.2.3 Standby GC Pump On
    • 5.2.4 Standby Unit On
    • 5.2.5 Water Under Floor
• 6.0 Component Operation and Maintenance
  • 6.1 System Testing
    • 6.1.1 Environmental Control Functions
      • Cooling
      • Heating
      • Humidification
      • Dehumidification
      • Proportional Heating/Cooling/ Dehumidification
      • Electric Panel
      • Control Transformer and Fuses
      • Fan Safety Switch
      • Firestat
      • Smoke Detector
      • Water Detection Sensor
        • Figure 7 Liebert leak detection units
        • Figure 8 Recommended liquid sensor locations
        • Table 16 Zone leak detection kit installation scenarios
      • Remote Shutdown
  • 6.2 Filters
  • 6.3 Blower Package
    • 6.3.1 Fan Impellers and Bearings
    • 6.3.2 Belt
    • 6.3.3 Air Distribution
      • Table 17 Recommended free area ft2 (m2) for grilles or perforated panels at output velocities of 550 and 600 fpm (2.8 and 3.1 m/s)
  • 6.4 Refrigeration System
    • 6.4.1 Suction Pressure
      • Table 18 Suction pressures
    • 6.4.2 Discharge Pressure
      • Table 19 Discharge pressures
    • 6.4.3 Superheat
    • 6.4.4 Thermostatic Expansion Valve
      • Operation
      • Adjustment
    • 6.4.5 Hot Gas Bypass Valve
      • Operation
      • Adjustment
    • 6.4.6 Air Cooled Condenser
      • Checking Refrigerant Charge (Lee-Temp / Flood Back Head Pressure Control)
        • Figure 9 Outdoor fan/condenser configuration
    • 6.4.7 Water/Glycol Cooled Condensers
      • Coaxial Condenser
      • Regulating Valve
      • Standard Valve - 150 psig (1034 kPa) system for 3 & 5 ton units (Johnson Controls Valve) High Pressure Valve - 350 psig (2413 kPa) system for 5 ton units (Johnson Controls Valve)
        • Figure 10 Johnson Controls valve adjustment
      • High Pressure Valve - 350 PSIG System (2413 kPa) for 3 Ton Units (Metrex Valve)
        • Figure 11 Metrex valve adjustment
      • Glycol Solution Maintenance
    • 6.4.8 Compressor Functional Check
    • 6.4.9 Compressor Replacement
      • Mechanical Failure
      • Electrical Failure
      • Compressor Replacement Procedure
  • 6.5 Humidifier
    • 6.5.1 Infrared Humidifier
      • Removing the Pan
      • Cleaning the Pan
      • Changing Humidifier Lamps
        • Figure 12 Infrared humidifier lamps
      • Autoflush Infrared Humidifier Cleaning System
      • Autoflush Operation
      • Autoflush Controls
    • 6.5.2 Steam Generating Humidifier
      • Figure 13 Steam generating humidifier
      • Operation
      • Controls
      • Replacing the Canister
        • Table 20 Humidifier canister part numbers
        • Figure 14 Canister replacement
      • Circuit Board Adjustments
      • Drain Tempering Feature
• 7.0 Troubleshooting
  • Table 21 Blower troubleshooting
  • Table 22 Chilled water troubleshooting
  • Table 23 Compressor and refrigeration system troubleshooting
  • Table 24 Dehumidification troubleshooting
  • Table 25 Glycol pump troubleshooting
  • Table 26 Infrared humidifier troubleshooting
  • Table 27 Steam generating humidifier troubleshooting
  • Table 28 Reheat troubleshooting
• 8.0 Monthly Maintenance Inspection Checklist
  • Filters
  • Steam Generating Humidifier
  • Blower Section
  • Infrared Humidifier
  • Compressor
  • Refrigeration Cycle/Section
  • Air Cooled Condenser (if applicable)
  • Reheat
  • Air Distribution Section
  • Refrigerant Charge
• 9.0 Semiannual Maintenance Inspection Checklist
  • Filters
  • Blower Section
  • Compressor
  • Air Cooled Condenser (if applicable)
  • Water/Glycol Condenser (if applicable)
  • Glycol Pump
  • Steam Generating Humidifier
  • Infrared Humidifier
  • Refrigeration Cycle/Section
  • Air Distribution Section
  • Refrigerant Charge
  • Electrical Panel
  • Reheat