Emerson iCOM user manual Placement of Cooling Units, U2U Hardware Cables and Network Switch

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Installing a Liebert iCOM Unit-to-Unit Network

5.0INSTALLING A LIEBERT ICOM UNIT-TO-UNIT NETWORK

Connecting multiple Liebert iCOM-controlled cooling units in an Ethernet Unit-to-Unit (U2U) net- work enables the units to work together to achieve efficient cooling and humidity control of the condi- tioned space. Networking enables setting up the cooling units to exchange data for various modes of operation:

•Teamwork

•Lead/Lag-Standby

•Rotation

•Cascade

However the cooling units are set up, a large display may be used to control and view the operational status of individual units or of the entire system.

NOTE

The maximum number of cooling units that may be interconnected is 32.

5.1Placement of Cooling Units

Refer to the cooling unit product manuals for details on installation. Also consider these factors when planning for installation of cooling units with Liebert iCOM controls:

•heat load in the conditioned space

•cooling air distribution

•number of operating units versus number of standby cooling units

•location of the network switch—An Ethernet cable cannot exceed 328 feet (100m)

5.2U2U Hardware: Cables and Network Switch

Plan wiring runs for U2U communication when designing the layout of your conditioned space. In addition to general good wiring practices, take into account:

•Ethernet CAT5 or greater cable is required for interconnecting the units.

•Maximum distance must not exceed 328 feet (100m).

•A device to boost the Ethernet signal may be used to exceed the 328 feet (100m) length limitation.

•Ethernet network should be private—set up only for management and control of the cooling units.

•Keep control and communication cables away from power cables to prevent electromagnetic inter- ference.

•Do not bend cables to less than four times the diameter of the cable.

•Do not deform cables when securing in bundles or when hanging them.

•Keep cables away from devices that can introduce noise into them, such as machines, fluorescent lights, and electronics.

•Avoid stretching Ethernet cables—tension when pulling cables should not exceed 25 pounds (11kg).

•Do not secure Ethernet cables with any method that might damage them; use approved hangers, such as telephone wire/RG-6 coaxial wire hangers, available at most hardware stores.

Minimum Network Switch Requirements

•IEEE 802.3; IEEE 802.3u

•10/100 Mbps speed

•Multiple 10/100 RJ-45 ports—one shared; RJ-45 Uplink port

The Liebert vNSA™ is an approved powered network switch designed to support Liebert iCOM U2U networks. See Liebert vNSA on page 47 for details.

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Contents Liebert iCOM Page Table of Contents Installing a Liebert Icom UNIT-TO-UNITNETWORK TeamworkMounting a Large Display on a Wall Figures Tables Features Large and Small DisplaysESC Keyboard icons and functions Icon Key Name FunctionStatus menu, large display, graphical view Accessing Submenus Accessing Submenus on Small DisplaysAccessing Submenus on Large Displays Navigating Through the Liebert iCOM MenusEntering a Password Menu tree-Small display, stand-alone or networkedService Menu Unit Status Menu System View Status Menu Unit 1 View User MenuAdvanced Menu Unit Service Menu Unit # Viewing Multiple Units with a Networked Large DisplayAdvanced Menu Unit # SET User menu icons Service menu icons Single Unit Functions Unit/Fan Control Start StopLoss of Power Alarm Fan Alarm / Fan Protection SettingsVSD Setpoint VSD Fan Speed Setting AutorestartHigh Pressure Alarm Pump DownDigital Scroll High Temperature Compressor Timing-Units With Two CompressorsCompressor Sequencing Service Offset-Changing System Pressure Settings Motorized Ball Valve in Digital Scroll UnitsMBV Operation After Compressor is Turned Off Temperature Proportional Band Temperature proportional bandCompressor Control Compressor Proportional BandsOne Single-Step Compressor Without Unloaders-One-Step Two Single-Step Compressors Without Unloaders-Two-StepTwo Compressors With Unloaders-Four-Step Two compressors with unloaders four-stepDigital Scroll Compressors Digital scroll capacity modulation, 10-100% variableTemperature Control-Second Cooling Source Differential Temperatures / Controls Comparator CircuitDelta T Temperature Difference Between Room and Glycol Chilled Water ControlSecond cooling source and compressorized cooling Temperature Control-Reheat Reheat configuration typesGlycool Cooling-Free-Cooling Dual Cooling SourceOff ½ Proportional Band Decreasing Temperature Heat On ½ Dead Band 100%Tight Mode SCR ReheatStandard Mode Humidity Control Humidification DehumidificationHumidification Humidification Infrared Humidifier Parameters for infrared humidifier controlExternal Humidifier Control-Optional Dehumidification With Comp settings DehumidificationDehumidification Low Limit Dehumidification Compressor QuantityTemperature and Humidity Control Types Control TypesReheat During Dehumidification Humidity Sensor Reading Control Types High and Low, Temperature and Humidity Events Supply Limit-OptionalUser Inputs / Customer Inputs Customer inputsTime Delay Enable or DisableEvent Types and Properties Event TypesMain FAN Overload Possible Event Notifications Event notifications-large or small displayNext Maintenance Calculation Calculation of Next Maintenance and DiagnosticsCalculating Unit Wellness Parameters for Next Maintenance Calculation General Maintenance SettingsFans / Heaters / Humidifier Settings and Diagnostics Compressor 1 / 2 Settings and DiagnosticsTeamwork Mode Teamwork ModesApplication of Teamwork Modes No TeamworkTeamwork Mode 1 with two cooling units Standby Rotation Typical Standby Lead/Lag Function Standby and CascadePlacement of Cooling Units U2U Hardware Cables and Network SwitchMinimum Network Switch Requirements Wiring for Unit-to-Unit Communications-U2U Sample Liebert iCOM network configurationsLiebert iCOM U2U Ethernet Network Wiring a Liebert iCOM U2U Network Small Displays Large DisplaysWall-Mount Large Display Combining Large and Small Displays on a U2U NetworkWiring a small display for stand-alone operation Wiring a large display for stand-alone operation Ports available for connecting Liebert iCOM control devices Liebert vNSA298 84mm 305mm 14.25 362mm DPN001136 Rev Location Considerations Necessary Mounting ItemsMounting Instructions Liebert iCOM display dimensions Spare Part List-Large Display Only Setpoints parametersSpare part list parameters-large display only Event log parametersSet alarms parameters Sensor dataActive Alarms Active alarms parametersDisplay setup parameters Timer parameters-Sleep Mode Total run hours parametersService contacts parameters Service Menu Parameters Unit Diary-Large Display Only Unit diary parametersStandby settings / lead-lag parameters Maintenance / wellness settings parametersWellness COMP2 Wellness HEAT2 Diagnostics / service mode parameters ALM REL 7of Delay Enable Disab Enable Disab Comp 1 Overload Unit X Disconnected WRN Loss of Power LOP MSG, WRN, ALM Call Service MSG, WRN, ALM High Temperature Sensor calibration / setup parameters System / network setup parameters-large display only Network setup parameters GBPStatic RAM Not Available, Invalid, OK Options setup parameters HUM SteamService contact info parameters Service Menu Parameters Service Menu Parameters Page Ne t ItiTi n That
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