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American Power Conversion DX, FM manual Group configuration

Models: DX FM

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Group

Group

Up to four Systems can be connected to form a redundant Group. Joining Systems together to form a Group provides the following:

•Redundancy

•A way for other Systems in the Group to assist with the room load

•Demand fighting prevention (one System cooling while another reheats)

•System run-time balancing

•Setpoint sharing among Systems

•Alarm sharing among Systems

Note: Group settings are copied to each System in the Group.

Group configuration

Path: Main > Setup > Group > Group Config

The Group Config settings define the options to use in the redundant Group.

#Systems. Set the number of Systems connected together to form this Group. Setting the number of Systems to 1 disables the Group functions.

Setpoint Share. Enable or disable setpoint sharing among the Systems of this Group. When setpoint sharing is enabled, changes to the cool or reheat setpoint on any System in the Group are copied to all of the other Systems.

Note: The humidify and dehumidify setpoints are always shared.

Idle Blwr Spd. Set the behavior of the blowers for Systems that are in the idle, backup, or failed states. In raised floor installations, Systems that are not active (idle, backup, or failed) should maintain blower operation to maintain static pressure and to keep cool air flowing to your data-center equipment rather than up through an idle Module.

Dmnd Fighting. When enabled, reheat is prohibited for all Systems in the Group when any System in the Group has a cooling demand. This prevents Systems from working against each other.

Grp Fire Alrm. Share fire alarms among the Systems in this Group. If the Group Fire Alarm setting is On, then all Systems in the Group will shut down if a fire alarm occurs in one System. If the Group Fire Alarm setting is Off, the alarm will still be shared with the other Systems, but they will not shut down.

Grp Smoke Alrm. Share smoke alarms among the Systems in this Group. If the Group Smoke Alarm setting is On, all Systems in the Group will shut down if a smoke alarm occurs in one System.

42	NetworkAIR FM DX 60 Hz Operation, Maintenance, and Troubleshooting

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American Power Conversion DX, FM manual Group configuration

Contents

Operation, Maintenance, and Troubleshooting 60 HzNetworkAIR FM DX Precision Air Conditioner Page American Power Conversion Legal Disclaimer Page Safety General InformationOperation ContentsMechanical and Refrigeration Inspection Checklist Temperature alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Humidity alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Maintenance intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Alarm delay Maintenance Network Management CardTroubleshooting WarrantyPage General Information Modules, Systems, and GroupsModule SystemGroup Safety Symbols Used in this ManualSafety symbols that may be used in this manual Cross-referencesymbols used in this manualSafety Hazards Lockout/tagoutElectrical hazards Static dischargeDisplay Interface OperationFunction Using the Display Interface Scrolling status screensStatus Screen Name Status Information DisplayedMain menu screen Password entryNavigating the interface Change settings Factory default settingsStart the System Stop the SystemCommissioning Power on Power On/Off ProcedurePower off Commissioning Checklists Initial Inspection ChecklistElectrical Inspection Checklist Mechanical and Refrigeration Inspection ChecklistEnsure that Ensure thatMechanical Inspection Air-cooledChecklist User Interface Box Inspection ChecklistEnsure that Ensure thatStart-upInspection Checklist While the equipment is operating, ensure thatEnsure that Final Inspection ChecklistOwner Acceptance System Configuration System optionsPage Up Down System delays Sensor setup Building managementApplicable Settings Settings for fluid-cooledoptionsFluid-CoilType Flow Switch Multi Cndsr Vlv 3-way Valve typesActuator types Coil Fluid 3-wayEconomizer isolation valve optional Econ Isolator Valve EnableEcon Isolator Close Dly Econ Isolator Open Dly Page Contacts and Relays Input contactsDescription/Function Output relays Configure Module Module ConfigurationAlarm detectors Calibrate airflow manually Module ControlCalibrate airflow automatically Reset humidifier Reset Variable Frequency DriveSet up humidifier Control the Environment How the modes workDX Dehumidify. Similar to DX cooling, the output for dehumidification is determined by the difference between the setpoint and the average return humidity from each of the Modules in the System if more than one Module is present. The deadband is used to engage both compressors incrementally with increasing demand. Each Module in the System is assigned an equal division of the deadband a percentage of relative humidity. Both compressors in a Module are engaged when the assigned division of the deadband above the setpoint is reached. If the average return humidity reaches the setpoint plus the entire deadband, all of the compressors will be engaged until the humidity drops below the setpoint plus the deadband. Unlike DX cooling, the compressors in each Module are normally set to work as a single unit instead of separately. The use of one or two compressors per Module is based on the Dehum. Capacity setting Path Main Menu Setup System # System Config System Options Setpoints Deadbands Cool Deadband Compressor Allocation Two-ModuleSystemTo set the dehumidify deadband for your System Modes Essential functionsHow to tune the PIDs PID controlsPID Tuning Correction ControlProportional IntegralAlarms Temperature alarmsHumidity alarms Maintenance intervalsAlarm delay Group Group configurationGroup settings ModeRange Share ifSystem failure events Display Password and time-outTemperature and pressure units Date and timeAdjust display How to update the firmwareReset to defaults Product dataNetwork Configuration Network configurationScrolling status screens View Status ReadingsModule status System status Group statusPath Main Status System # Path: Main > Status > GroupView Event Log View logRespond to Alarms Major or minor alarm LEDsView active alarms Clear active alarmsDisplayed Alarm Message Alarm messages and suggested actionsAction Required Action Required Displayed Alarm MessageCondensate Pump Fail Env Temperature Low Displayed Alarm MessageAction Required Action Required Displayed Alarm MessageSystem Options Action Required Displayed Alarm MessageHumidifier Displayed Alarm Message System Config System OptionsAction Required Comm Lost state, or OffAction Required Displayed Alarm MessageSupply Humidity High Action Required Displayed Alarm MessageSystem Comm Lost Quick Configuration Network Management CardTCP/IP configuration methods OverviewBOOTP and DHCP configuration APC Device IP Configuration WizardPath Setup System Network Config A Vendor Class Identifier APC by default Remote access to the control console Control console 1.Choose Network from the Control Console menuAccess a Configured Unit OverviewWeb interface Telnet/SSHSNMP FTP/SCPRecover From a Lost Password Maintenance Monthly Preventive MaintenanceCleanliness EnvironmentMechanical ElectricalMechanical Quarterly Preventive MaintenanceElectrical Functional tests Verify the following modes of operationFull cooling Full reheat Humidification Dehumidification MultiCool EconomizerSemi-AnnualPreventive Maintenance CleanlinessMechanical ElectricalFunctional tests Measure the refrigerant pressuresTroubleshooting ProblemPossible Cause Corrective ActionProblem Possible CauseCorrective Action Compressor fails toProblem Possible CauseCorrective Action Compressor noisyProblem Possible CauseCorrective Action Head pressure tooProblem Possible CauseCorrective Action Suction pressure tooPage Warranty One-YearFactory WarrantyTerms of warranty Non-transferablewarrantyWarranty claims Claims Warranty ProceduresParts Page Page 990-3127 APC Worldwide Customer Support990-3127 10/2007