Document Outline

• Important Safety Instructions
• SAVE THESE INSTRUCTIONS
• 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
• 2.0 Startup
  • 2.1 Startup Procedure
• 3.0 Operation with iCOM Control
  • 3.1 Features
    • Large and Small Displays
      • Figure 1 Liebert iCOM components
• 4.0 Liebert iCOM Display Components and Functions
  • Figure 2 Liebert iCOM display components
  • Table 1 Keyboard icons and functions
  • Figure 3 Liebert iCOM default screen symbols
  • 4.1 Navigating Through the Liebert iCOM Display
    • Figure 4 Liebert iCOM default home screen—Graphical view
    • Figure 5 Liebert iCOM default home screen—Simple view
    • 4.1.1 Control Interface—Three Main Menus
    • 4.1.2 Accessing Menus and Settings
      • Viewing Data
    • 4.1.3 Entering the Password
      • Figure 6 Entering the password
    • 4.1.4 Accessing Submenus
      • Accessing Submenus on Small Displays
      • Accessing Submenus on Large Displays
        • Figure 7 Menu tree—Large and small displays, stand-alone or networked
  • 4.2 Changing Operational Settings
    • Figure 8 Liebert iCOM User Menu icons
  • 4.3 Changing Liebert iCOM’s Display Settings
    • Figure 9 Display setup screen
  • 4.4 Graphical Data Record
    • Figure 10 Temperature graph
  • 4.5 Liebert iCOM Service Menu Icons and Legend
    • Figure 11 Liebert iCOM Service Menu icons
  • 4.6 Wiring for Unit-to-Unit Communications—U2U
    • 4.6.1 Liebert iCOM U2U Ethernet Network
      • Table 2 Sample Liebert iCOM network configurations
    • 4.6.2 Wiring a Liebert iCOM U2U Network
      • Small Displays
      • Large Displays
      • Wall-Mount Large Display
      • Combining Large and Small Displays on a U2U Network
        • Figure 12 U2U network setup diagram
      • Notes on Wiring for a U2U Network—Refer to Figures 13 and 15
        • Figure 13 Liebert iCOM wiring—Unit as shipped
        • Figure 14 Wiring a small display for U2U network operation
        • Figure 15 Wiring a large display for U2U network operation
        • Figure 16 Liebert iCOM input-output control board
  • 4.7 Entering Network Setup Information
    • Figure 17 Control board U2U network setup screen
    • Figure 18 Liebert iCOM display U2U network setup screen
  • 4.8 Viewing Multiple Units with a Networked Large Display
    • Figure 19 Menu tree—Large display, networked
• 5.0 Operation
  • 5.1 Single Unit Functions
    • 5.1.1 Unit/Fan Control
      • Start - Stop
        • Figure 20 Start-stop priority switches
      • Autorestart
      • Loss of Power Alarm
      • Fan Alarm / Fan Protection Settings
    • 5.1.2 General Compressor Requirements
      • Low-Pressure Time Delay
      • Pump Down—Air Cooled with Condenser Only Units
      • High Pressure Alarm
      • Digital Scroll High Temperature
    • 5.1.3 Compressor Timing
  • 5.2 Control Types
    • 5.2.1 Proportional Control
    • 5.2.2 PI Control
    • 5.2.3 Intelligent Control (Chilled Water Only)
• 6.0 Alarm Descriptions
  • 6.1 Standard Alarms
    • 6.1.1 Change Filter
    • 6.1.2 Compressor Overload
    • 6.1.3 High Head Pressure
    • 6.1.4 High Humidity
    • 6.1.5 High Humidity and Low Humidity (Simultaneously)
    • 6.1.6 High Temperature
    • 6.1.7 High Temperature and Low Temperature (Simultaneously)
    • 6.1.8 Humidifier Problem
      • Infrared Humidifiers
      • Steam Generating (Canister) Humidifiers
    • 6.1.9 Loss of Air Flow
    • 6.1.10 Loss of Power
    • 6.1.11 Low Humidity
    • 6.1.12 Low Suction Pressure
    • 6.1.13 Low Temperature
    • 6.1.14 Main Fan Overload
    • 6.1.15 Short Cycle
  • 6.2 Optional Alarms
    • 6.2.1 Loss of Water Flow
    • 6.2.2 Smoke Detected
    • 6.2.3 Standby GC Pump On
    • 6.2.4 Standby Unit On
    • 6.2.5 Water Under Floor
  • 6.3 Set Alarms—User Menus
    • Table 3 Set alarms—User Menus
• 7.0 Component Operation and Maintenance
  • 7.1 System Testing
    • 7.1.1 Environmental Control Functions
      • Cooling
      • Heating
      • Humidification
      • Dehumidification
      • Electric Panel
      • Control Transformer and Fuses
      • Fan Safety Switch
      • High-Temp Sensor
      • Smoke Detector
      • Water Detection Sensor
        • Figure 21 Liebert leak detection units
        • Figure 22 Recommended liquid sensor locations
        • Table 4 Zone leak detection kit installation scenarios
      • Remote Shutdown
  • 7.2 Filters
  • 7.3 Blower Package
    • 7.3.1 Fan Impellers and Bearings
    • 7.3.2 Belt
    • 7.3.3 Air Distribution
      • Table 5 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)
  • 7.4 Refrigeration System
    • 7.4.1 Suction Pressure
      • Table 6 Suction pressures - R407c
    • 7.4.2 Discharge Pressure
      • Table 7 Discharge pressures
    • 7.4.3 Superheat
    • 7.4.4 Thermostatic Expansion Valve
      • Operation
      • Adjustment
    • 7.4.5 Hot Gas Bypass Valve—Not Available on Digital Scroll Units
      • Operation—Self-Contained Units
      • Adjustment
    • 7.4.6 Air Cooled Condenser
      • Checking Refrigerant Charge (Lee–Temp / Flood Back Head Pressure Control)
        • Figure 23 Outdoor fan/condenser configuration
    • 7.4.7 Water/Glycol Cooled Condensers
      • Coaxial Condenser
    • 7.4.8 Motorized Ball Valve—Digital Scroll Compressor
      • Control
      • Control Method
      • Adjustment
      • Startup
      • Location
      • Manual Control
    • 7.4.9 Regulating Valve—Scroll Compressor
      • 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 24 Johnson Controls valve adjustment
      • High Pressure Valve - 350 PSIG System (2413 kPa) for 3 Ton Units (Metrex Valve)
        • Figure 25 Metrex valve adjustment
    • 7.4.10 Drycooler Settings
      • Table 8 Water/glycol system conditions requiring optional settings for aquastats
      • Table 9 Aquastat settings—two-fan through four-fan drycoolers
    • 7.4.11 Compressor Oil
      • Table 10 Compressor oil types
  • 7.5 Compressor Replacement
    • Before Replacing or Returning a Compressor
    • 7.5.1 Compressor Functional Check
    • 7.5.2 Standard Scroll Compressor Replacement
      • Mechanical Failure
      • Electrical Failure
    • 7.5.3 Digital Scroll Compressor Replacement Procedure
      • Digital Compressor Unloading Solenoid(s)—Models 040, 042, 047, 049, 061 and 072
  • 7.6 Facility Fluid and Piping Maintenance for Water and Glycol Systems
    • Glycol Solution Maintenance
  • 7.7 Humidifier
    • 7.7.1 Infrared Humidifier
      • Removing the Pan
      • Cleaning the Pan
      • Changing Humidifier Lamps
        • Figure 26 Infrared humidifier lamps
      • Autoflush Infrared Humidifier Cleaning System
      • Autoflush Operation
      • Autoflush Controls
    • 7.7.2 Steam Generating Humidifier
      • Figure 27 Steam generating humidifier
      • Operation
      • Controls
      • Replacing the Canister
        • Table 11 Humidifier canister part numbers
      • Circuit Board Adjustments
      • Drain Tempering Feature
• 8.0 Troubleshooting
  • Table 12 Blower troubleshooting
  • Table 13 Chilled water troubleshooting
  • Table 14 Compressor and refrigeration system troubleshooting
  • Table 15 Dehumidification troubleshooting
  • Table 16 Glycol pump troubleshooting
  • Table 17 Infrared humidifier troubleshooting
  • Table 18 Steam generating humidifier troubleshooting
  • Table 19 Reheat troubleshooting
• 9.0 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
• 10.0 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