Stagecompressors, Unloader State | Liebert TM-10098 manual

STAGE COMPRESSORS, UNLOADER STATE

iCOM Controls Training and Service Manual

and will be supplied with an electrical cylinder unloader valve. The electrical solenoid valve used to unload or reduce the cooling capacity of the compressor. The compressors will operate in an on/ off - loaded/ unloaded configuration method to cool the space. The hot gas bypass solenoid valve option is not available on 4 stage systems.

The temperature controller activates the first cooling stage, lead compressor unloaded, when the return air temperature increases to 25% of the cooling proportional band. The second cooling stage, lag compressor unloaded, is activated when the return air temperature increases to 50% of the cooling proportional band.

The temperature controller activates the third cooling stage, the lead compressor loaded, when the return air temperature increases to 75% of the cooling proportional band. The fourth cooling stage, the lag compressor loaded, is activated when the return air temperature increases to 100% of the cooling proportional band.

The temperature controller deactivates the fourth cooling stage, lag compressor loaded, when the return air temperature decreases to 75% of the cooling proportional control band value. The third cooling stage, lead compressor loaded, is deactivated when the return air temperature decreases to 50% of the cooling proportional control band value.

The temperature controller deactivates the second cooling stage, lag compressor unloaded, when the return air temperature decreases to 25% of the cooling proportional control band value. The first cooling stage, lead compressor unloaded, is deactivated when the return air temperature decreases to the temperature set point value or 0% of the cooling proportional control band value.

The table below shows the devices activated by each of the four cooling stages.

STAGE COMPRESSORS, UNLOADER STATE

1Compressor 1 On, Unloader On (Energized) Compressor 2 Off, Unloader Off (De-Energized)

2Compressor 1 On, Unloader On (Energized) Compressor 2 Off, Unloader On (Energized)

3Compressor 1 On, Unloader Off (De-Energized) Compressor 2 On, Unloader On (Energized)

4Compressor 1 On, Unloader Off (De-Energized) Compressor 2 On, Unloader Off (De-Energized)

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Liebert TM-10098 service manual Stagecompressors, Unloader State

Contents

iCOM Microprocessor Environmental Training and Service ManualTM-10098:Rev. 02/06 Large Systems Training & Service Manual iCOM Control Training and Service ManualiCOM Page Table of Contents Chapter 1 Temperature/ Humidity ControliCOM Control Training and Service Manual iCOM Controls Training and Service Manual Chapter 4: General Troubleshooting DataChapter 2: Programming Functions Chapter 3: iCOM Hardware Connections Computer and Network Terms How To Use The SchematicsElectrical Schematics Glossary of Terms iCOM Controls Training and Service Manual Chapter Temperature and Humidity Control ProgramsTemperature Control Program Types Cooling and/ or Heating Required, in Percent % Consequence iCOM Control Training and Service ManualMembership Knowledge Base/Decision Making iCOM Controls Training and Service Manual Proportional P ControlProportional + Integral PI Control Proportional + Integral + Derivative PID Control iCOM Control Training and Service Manual A suggested tuning procedure is as follows iCOM Controls Training and Service Manual Operations and Charts Temperature ControliCOM Control Training and Service Manual Temp Set Point + 1/2 Proportional Band 2 Stage Compressorized Cooling – No Dead Band 2 Stage Compressorized Cooling – With Dead Band iCOM Control Training and Service Manual STAGECOMPRESSORS, UNLOADER STATE Temp Set Point + 1/2 Proportional Band 4 Stage Compressorized Cooling – No Dead Band iCOM Controls Training and Service Manual 4 Stage Compressorized Cooling – With Dead BandSTAGE TEMPERATURE As the return air temperature increases Cooling 1, lead compressor unloaded, is activated at 72F or ½ of the dead band value plus 25% of the cooling control band. If the return air temperature continues to increase Cooling 2, lag compressor unloaded, will activate at 73F or ½ of the dead band value plus 50% of the cooling control band. If the return air temperature continues to increase Cooling 3, lead compressor unloaded, is activated at 74F or ½ of the dead band value plus 75% of the cooling control band. If the return air temperature continues to increase Cooling 4, lag compressor loaded, will activate at 75F or ½ of the dead band value plus 100% of the cooling control band iCOM Control Training and Service Manual compressor ON iCOM Controls Training and Service Manual1 compressor operation Switch 2nd Switch 1st compressor ON Glycool at 100% Capacity – No Dead Band iCOM Control Training and Service Manual iCOM Controls Training and Service Manual Glycool at 50% Capacity – No Dead BandDual Source Cooling Staged Electric Reheat Dual Cooling at 100% Capacity – No Dead Band iCOM Controls Training and Service Manual 3 Stage Electric Reheat – No Dead BandTemp Set Point - 1/2 Proportional Band 3 Stage Electric Reheat - With Dead Band Humidity Control Program Types Humidity Control Proportional iCOM Control Training and Service ManualHumidity Humidity Relative Humidity Control Operations and ChartsHumidifier Operation iCOM Controls Training and Service Manual iCOM Control Training and Service Manual Infrared Humidification – No Dead BandHumidity Set Point - 1/2 Proportional Band Infrared Humidification – With Dead Band iCOM Controls Training and Service Manual Autoflush Control Flow Chart iCOM Control Training and Service Manual Dehumidification Operation Humid Set Point: 50% Humidity Set Point + 1/2 Proportional Band iCOM Controls Training and Service Manual Reheating during Dehumidification iCOM Controls Training and Service Manual ParameterOperationNo Normal Delayed iCOM Control Training and Service Manual Additional ProgramsStart Auto restart Call for Cooling Fan Alarm / Fan settingsHigh Pressure Cutout Suction Pressure Transducer The Startup and Freeze Protection Program iCOM Control Training and Service Manual The Maintenance Calculation is done as follows Next Maintenance CalculationiCOM Controls Training and Service Manual Calculation of next Maintenance Parameters Parameters for next Maintenance Calculation General Maintenance SettingsiCOM Control Training and Service Manual Shared Parameters an understanding Networking and Functions Understanding the iCOM Network setup processiCOM Control Training and Service Manual The Basic for Programming The Basics for HardwareThe Basics for Cooling Unit Placement iCOM Controls Training and Service Manual Example: Display: Example: Control Board: iCOM Control Training and Service Manual Unit No. Setting ParametersiCOM Controls Training and Service Manual Unit No. Unit No. iCOM Control Training and Service ManualPower Switch U2U:Switc iCOM Controls Training and Service Manual Line S802: Number units connected: xx 01 - iCOM Control Training and Service Manual “No” Teamwork TeamworkiCOM Controls Training and Service Manual Teamwork Modes Typical Lead/ Lag Running/ Standby Function Unit Lead/ Lag or Running/ Standby FunctioniCOM Control Training and Service Manual Teamwork Mode Standby & Cascade iCOM Controls Training and Service Manual iCOM Control Training and Service Manual Notes Optional Large Graphic Display with Panel ChapterProgramming Functions Small Graphic Display with Panel Mount Bezel iCOM Display Components and Functions iCOM Keyboard LayoutiCOM Control Training and Service Manual Key Name iCOM Controls Training and Service ManualiCOM Keyboard Layout Icon iCOM Control Training and Service Manual iCOM Display Symbols/ Icons Status Display Programming Functions Level 1: User Menu Screens ICON Symbols Menu Parameters NamesiCOM Control Training and Service Manual Level 2: Service Name User Menu Icons and DescriptionsiCOM Controls Training and Service Manual Icon C/ F Service Menu Icons and Descriptions iCOM Controls Training and Service Manual Menu ParametersAdvanced Menu Icons and Descriptions User Menu Parameters Menu Line DefaultUser Menu: Spare Parts List, Large Display Only User Menu: Set Point Parameters U100 series Parameter iCOM Controls Training and Service ManualDefault User Menu: Graphics Parameters Parameter User Menu: Set Alarm Parameters U200 seriesDefault Menu Line Default iCOM Controls Training and Service ManualUser Menu: Active Alarms Parameters Parameter User Menu: Display Setup Parameters U400 series Menu Line iCOM Control Training and Service ManualDefault User Menu Total Run Hours Parameters U500 series Parameter iCOM Controls Training and Service ManualUser Menu: Service Contacts U700 series Menu Line Menu Line Service Menu ParametersiCOM Control Training and Service Manual Default Parameter DefaultService Menu: Unit Diary Log Parameter Menu Line Menu Line iCOM Control Training and Service ManualDefault Default Parameter DefaultDefault Menu Line Menu Line iCOM Control Training and Service ManualDefault Default Parameters: Page 6 of iCOM Controls Training and Service ManualDefault Default Parameter iCOM Control Training and Service ManualDefault Menu Line Range iCOM Controls Training and Service ManualMenu Line Parameter Range iCOM Control Training and Service ManualMenu Line Parameter Menu Line DefaultService Menu Set Alarm Parameters Default Menu Line iCOM Control Training and Service ManualService Menu: Set Alarm Parameters: Page 3 of Service Menu Set Alarm Parameters Menu Line iCOM Controls Training and Service ManualService Menu: Set Alarm Parameters: Page 5 of Service Menu Set Alarm Parameters Range iCOM Control Training and Service ManualMenu Line Parameter Menu Line iCOM Controls Training and Service ManualDefault Default Menu Line iCOM Control Training and Service ManualDefault Default Menu Line iCOM Controls Training and Service ManualDefault Default Menu Line iCOM Control Training and Service ManualDefault Default Parameter Advanced Menu ParametersiCOM Controls Training and Service Manual Menu Code Menu Code iCOM Control Training and Service ManualDefault Default Menu Code iCOM Controls Training and Service ManualDefault Default Range DefaultMenu Code Parameter Range DefaultMenu Code Parameter Description Large Display Events Notifications ParametersiCOM Control Training and Service Manual Type Description Large Display Events Notifications Parameters continuediCOM Controls Training and Service Manual Type Description Large Display iCOM Control Training and Service ManualEvents Notifications Parameters continued Type Default Events Notifications Parameters continuedEvent ID number, Description and Function iCOM Controls Training and Service Manual LOSS OF iCOM Control Training and Service Manual HUM HRS iCOM Controls Training and Service Manual Unit COMP DIG SCROLL2 iCOM Control Training and Service Manual UNIT CODE MISMATCH iCOM Control Training and Service Manual iCOM Controls Training and Service Manual ChapterControl Board Connections Introduction LCD Display Board iCOM Control Training and Service ManualLarge Disdplay Small Display Control Board DIP Switches and Plug Connectors Unit Mounted Control BoardiCOM Controls Training and Service Manual Setting iCOM Control Training and Service ManualiCOM Control Board DIP Switch #2 Settings Connector Default Setting iCOM Controls Training and Service ManualiCOM Control Board Jumper Settings Setting Small Display DIP Switch #3 Settings Large Display Jumper SettingsSetting Default Setting Default Setting iCOM Controls Training and Service ManualSmall Display Jumper Settings Setting P8: 24 VAC Alarm Inputs DS SystemsiCOM Control Training and Service Manual P4 24 VAC Power P33: Compressor Devices iCOM Controls Training and Service ManualP22 Glycool Valve Std. Pressure Actuator P32: Compressor Devices P40: Basic Unit Connections iCOM Control Training and Service ManualP38 Smoke Detector P39: Firestat & Remote Shutdown P66: Unit Small Display Digital Signals iCOM Controls Training and Service ManualP65: Optional Intelleslot Power Suplly P64: Unit Large Display Digital Signals P41: 24 VAC Power Fuse Board Layout: All UnitsiCOM Control Training and Service Manual P4: 24 VAC Power Temperature/ Humidity Board Temperature/ Humidity Board: All UnitsiCOM Controls Training and Service Manual Temperature/ Humidity Assembly Housing iCOM Control Training and Service Manual NOTES iCOM Controls Training and Service Manual General Troubleshooting DataChapter C P U Isolation iCOM Control Training and Service ManualAreas of Control Semiconductor Showing No Movement of Electrons BASIC OPERATION OF THE TRIACiCOM Controls Training and Service Manual Semiconductor iCOM Control Training and Service Manual Schematic Drawing for the TriacFront and Left Side Views of the Triac Basic Operation of the Opto-Isolator Output Opto-IsolatorInput Opto-Isolator OUTPUT VOLTAGE CHECK Troubleshooting the Output Opto-IsolatoriCOM Control Training and Service Manual Output Opto-IsolatorPin Location INPUT VOLTAGE CHECK Troubleshooting the Input Opto-IsolatoriCOM Controls Training and Service Manual Input Opto-IsolatorPin Location Opto Alarm Input Opto-IsolatorLegendMicroprocessor Control Board iCOM Control Training and Service Manual Opto Control Output Opto-IsolatorLegendControl Output Triac Legend iCOM Controls Training and Service Manual iCOM Control Training and Service Manual iCOM Diagnostics / Service Mode Program DC Voltage check Basic Troubleshooting StepsiCOM Controls Training and Service Manual Programming If 24 VAC is present perform the following iCOM Control Training and Service Manual iCOM Controls Training and Service Manual Moisture Content Charts Grains Per Lb iCOM Control Training and Service ManualMoisture Content at Temperature = 80F 26.7ºC Grains Per Cu Ft Grains Per Lb iCOM Controls Training and Service ManualMoisture Content at Temperature = 79F 26.1ºC Grains Per Cu Ft Grains Per Lb iCOM Control Training and Service ManualMoisture Content at Temperature = 78F 25.6ºC Grains Per Cu Ft Moisture Content at Temperature = 77F 25.0ºC Grains Per Cu FtGrains Per Lb Moisture Content at Temperature = 76F 24.4ºC Grains Per Cu FtGrains Per Lb Grains Per Lb iCOM Controls Training and Service ManualMoisture Content at Temperature = 75F 23.9ºC Grains Per Cu Ft Moisture Content at Temperature = 74F 23.3ºC Grains Per Cu FtGrains Per Lb Grains Per Lb iCOM Controls Training and Service ManualMoisture Content at Temperature = 73F 22.8ºC Grains Per Cu Ft Grains Per Lb iCOM Control Training and Service ManualMoisture Content at Temperature = 72F 22.2ºC Grains Per Cu Ft Moisture Content at Temperature = 71F 21.7ºC Grains Per Cu FtGrains Per Lb Grains Per Lb iCOM Control Training and Service ManualMoisture Content at Temperature = 70F 21.1ºC Grains Per Cu Ft Grains Per Lb iCOM Controls Training and Service ManualMoisture Content at Temperature = 69F 20.6ºC Grains Per Cu Ft Grains Per Lb iCOM Control Training and Service ManualMoisture Content at Temperature = 68F 20.0ºC Grains Per Cu Ft Moisture Content at Temperature = 67F 19.4ºC Grains Per Cu FtGrains Per Lb Grains Per Lb iCOM Control Training and Service ManualMoisture Content at Temperature = 66F 18.9ºC Grains Per Cu Ft Grains Per Lb iCOM Controls Training and Service ManualMoisture Content at Temperature = 65F 18.3ºC Grains Per Cu Ft iCOM Control Training and Service Manual Suction Transducer Information Codes A124-A128 Digital Scroll High Temperature Sensor Chart NTC Code S606 and S608iCOM Controls Training and Service Manual Unit Code Description iCOM Control Training and Service ManualFACTORY SERVICE TECHNICIAN iCOM Controls Training and Service Manual Troubleshooting Checklist Code Glossary of Unit and System Parameters User MenuiCOM Control Training and Service Manual Set Alarms Code iCOM Controls Training and Service ManualDisplay Setup Timer Wellness / General Settings Service MenuService contacts Standby settings / Lead-lag Compr. 2 Settings iCOM Controls Training and Service ManualFan Settings Compr. 1 Settings Code El. Heater 3 SettingsHumidifier Settings Diagnostics / Service Type iCOM Controls Training and Service ManualSet Alarms Code Code iCOM Control Training and Service ManualSystem / Network Setup Options Setup Factory Settings Advanced MenuiCOM Controls Training and Service Manual Service contacts iCOM Control Training and Service Manual AccessCode iCOM Controls Training and Service Manual Glossary of Terms Hysteresis: Differential iCOM Control Training and Service Manual Input: An incoming information signal iCOM Controls Training and Service Manual Prefill: The period of time between when the water begins to fill the pan and the humidifier lamps turn on iCOM Control Training and Service Manual iCOM Controls Training and Service Manual Computer and Network Terms Ethernet: A local-areanetwork LANarchitecture developed by Xerox Corporationin cooperation with DECand Intelin 1976. Ethernet uses a bus or star topologyand supports data transfer ratesof 10 Mbps. The Ethernet specification served as the basis for the IEEE 802.3 standard, which specifies the physicaland lower softwarelayers. Ethernet uses the CSMA/CDaccess method to handle simultaneous demands. It is one of the most widely implemented LAN standards •the type of error checking to be used iCOM Controls Training and Service Manual There are a variety of standard protocols from which programmerscan choose. Each has particular advantages and disadvantages; for example, some are simpler than others, some are more reliable, and some are faster. From a userspoint of view, the only interesting aspect about protocols is that your computeror device must supportthe right ones if you want to communicate with other computers. The protocol can be implemented either in hardwareor in software iCOM Control Training and Service Manual Understanding IP Addressing: Every computer that communicates over the Internet is assigned an IP address that uniquely identifies the device and distinguishes it from other computers on the Internet. An IP address consists of 32 bits, often shown as 4 octets of numbers from 0-255represented in decimal form instead of binary form. For example, the IP address 168.212.226.204 in binary form is: iCOM Controls Training and Service Manual HUBS AND SWITCHES Network InformationiCOM Control Training and Service Manual What is networking?… iCOM Controls Training and Service Manual UNIT IDENTIFICATION OR ADDRESSINGTwisted pair - 10baseT - UTP Cable iCOM Control Training and Service Manual How To Use The Schematics Electrical Schematics iCOM Controls Training and Service Manual182769 Liebert DS iCOM Global Control 8 - 12 Ton iCOM Control Training and Service Manual