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3000/ITR manual Semiannual Maintenance Inspection Checklist
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Troubleshooting
U2U network setup diagram
7.5.2Standard Scroll Compressor Replacement
Maintenance
Outdoor fan/condenser configuration
4.6Wiring for Unit-to-Unit Communications-U2U
6.1.8Humidifier Problem Infrared Humidifiers
Setup on Large Display Only
2.1Startup Procedure
Liebert iCOM default screen symbols
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Semiannual Maintenance Inspection Checklist
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Contents
Precision Cooling
Operation& Maintenance Manual -50& 60Hz
For Business-CriticalContinuity
Page
TABLE OF CONTENTS
Page
FIGURES
TABLES
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
Page
1.1.1Compressorized Systems
1.1System Descriptions
1.0INTRODUCTION
1.1.2GLYCOOL Chilled Glycol Cooling Systems
2.1Startup Procedure
2.0STARTUP
18.Close front accent panel and latch
14.Check for unusual noises and vibration
17.Close high voltage dead front cover and latch
Return completed startup form to
Large and Small Displays
3.1Features
3.0OPERATION WITH ICOM CONTROL
Figure 1 Liebert iCOM components
Figure 2 Liebert iCOM display components
4.0LIEBERT ICOM DISPLAY COMPONENTS AND FUNCTIONS
Liebert iCOM Display Components and Functions
Keyboard icons and functions
Liebert iCOM Display Components and Functions
51.6
maintenance
73.6
cooling
4.1.1Control Interface-ThreeMain Menus
74.1F
51.6FACT
UNIT
4.1.3Entering the Password
4.1.2Accessing Menus and Settings Viewing Data
Figure 6 Entering the password
Accessing Submenus on Large Displays
4.1.4Accessing Submenus
Accessing Submenus on Small Displays
Liebert iCOM Display Components and Functions
Setup on Large Display Only
Maintenance on Large Display Only
Service Mode on Large Display Only
Large Display Only
C / F
ALARMS
ACTIVE
RH
4.3Changing Liebert iCOM’s Display Settings
Figure 10 Temperature graph
RH
RETURN AIR TEMPERATURE
Figure 11 Liebert iCOM Service Menu icons
4.6.1Liebert iCOM U2U Ethernet Network
4.6Wiring for Unit-to-Unit Communications-U2U
4.6.2Wiring a Liebert iCOM U2U Network
Small Displays
Wall-MountLarge Display
Large Displays
Liebert iCOM Display Components and Functions
Liebert Challenger with Large Liebert
Network Switch
Figure 12 U2U network setup diagram
iCOM Display
1.See unit electrical schematic
194273
Figure 13 Liebert iCOM wiring-Unitas shipped
Liebert iCOM Display Components and Functions
194273
Liebert iCOM I/O Board
Rear View U2U Networking Switch Field-Supplied
Cable C P64A Connection Located Near I/O Board
Rear View
Optional Large
Graphics Display
194273
Figure 16 Liebert iCOM input-outputcontrol board
Liebert iCOM Display Components and Functions
4.7Entering Network Setup Information
Status Menu Unit
Service Menu Unit #
Status Menu Unit 1 View
User Menu Unit #
5.0OPERATION
Figure 20 Start-stoppriority switches
5.1Single Unit Functions
5.1.1Unit/Fan Control Start - Stop
Fan Alarm / Fan Protection Settings
Loss of Power Alarm
Autorestart
Pump Down-AirCooled with Condenser Only Units
High Pressure Alarm
Digital Scroll High Temperature
5.1.3Compressor Timing
5.2.1Proportional Control
5.2Control Types
5.2.2PI Control
5.2.3Intelligent Control Chilled Water Only
6.1.1Change Filter
6.1Standard Alarms
6.0ALARM DESCRIPTIONS
6.1.2Compressor Overload
6.1.3High Head Pressure
6.1.6High Temperature
6.1.8Humidifier Problem Infrared Humidifiers
6.1.4High Humidity
6.1.9Loss of Air Flow
6.1.10Loss of Power
6.1.13Low Temperature
6.1.11Low Humidity
6.2.2Smoke Detected
Set alarms-UserMenus
6.2.1Loss of Water Flow
6.2.3Standby GC Pump On
Cooling
7.0COMPONENT OPERATION AND MAINTENANCE
7.1.1Environmental Control Functions
Heating
High-TempSensor
Fan Safety Switch
Control Transformer and Fuses
Smoke Detector
Remote Shutdown
Figure 22 Recommended liquid sensor locations
7.3.1Fan Impellers and Bearings
7.2Filters
7.3Blower Package
7.3.2Belt
7.4.1Suction Pressure
7.4Refrigeration System
7.3.3Air Distribution
Table 6 Suction pressures - R407c
7.4.3Superheat
Adjustment
7.4.2Discharge Pressure
7.4.4Thermostatic Expansion Valve Operation
Operation-Self-ContainedUnits
Adjustment
7.4.6Air Cooled Condenser
Figure 23 Outdoor fan/condenser configuration
Control Method
Adjustment
Control
Startup
Figure 25 Metrex valve adjustment
Figure 24 Johnson Controls valve adjustment
Component Operation and Maintenance
7.4.10Drycooler Settings
1. All drycoolers are shipped at Factory Setting
7.5.1Compressor Functional Check
7.4.11 Compressor Oil
Before Replacing or Returning a Compressor
Table 10 Compressor oil types
Mechanical Failure
7.5.2Standard Scroll Compressor Replacement
Electrical Failure
Glycol Solution Maintenance
7.7.1Infrared Humidifier
Cleaning the Pan
7.7Humidifier
Removing the Pan
Autoflush Operation
Autoflush Infrared Humidifier Cleaning System
Changing Humidifier Lamps
Figure 26 Infrared humidifier lamps
7.7.2Steam Generating Humidifier
Autoflush Controls
Figure 27 Steam generating humidifier
Operation
Component Operation and Maintenance
Controls
Replacing the Canister
When replacing the canister
Table 11 Humidifier canister part numbers
Circuit Board Adjustments
Drain Tempering Feature
Table 12 Blower troubleshooting
8.0TROUBLESHOOTING
Table 13 Chilled water troubleshooting
Troubleshooting
Troubleshooting
Table 17 Infrared humidifier troubleshooting
Table 15 Dehumidification troubleshooting
Table 16 Glycol pump troubleshooting
Troubleshooting
Troubleshooting
Table 19 Reheat troubleshooting
Troubleshooting
Steam Generating Humidifier
9.0MONTHLY MAINTENANCE INSPECTION CHECKLIST
Filters
Blower Section
Blower Section
10.0SEMIANNUAL MAINTENANCE INSPECTION CHECKLIST
Filters
Compressor
Semiannual Maintenance Inspection Checklist
Page
pport
Ensuring The High Availability
Of Mission-CriticalData And Applications
that
