Glycool at 100% Capacity – No Dead Band | Liebert TM-10098 manual

Glycool at 100% Capacity – No Dead Band

iCOM Control Training and Service Manual

temperature is at least 8°F below the return air temperature, or 3°F lower than the return air temperature for two consecutive hours.

When the microprocessor decides that the return glycol fluid temperature is cold enough the first cooling band is the modulating valve control method, and the second band, added to the first band, is for the compressors as in the normal

2-Stage or 4-Stage control method. If the chilled glycol fluid temperature is not cold enough the valve control band is replaced by the compressor band. If the chilled glycol cooling capacity is reduced by a rise in the glycol fluid temperature, the control band shrinks proportionally. This allows the compressor band to move down as well. The following shows the Glycool operation at 100% capacity and the Glycool at 50% capacity.

Glycool at 100% Capacity – No Dead Band

Temp Set Point + (1/2 Proportional Band + 1/2 Proportional Band)
Temp Set Point: 70°
Proportional Band: 8°
				100%		Cool 1 On		Cool 2 On
				Open		Cool 1 On
Valve				Open
Valve
Closed
70	71	72	73	74	75	76		77	78	79
	Band 1 Glycool Valve				Band 2 Compressors
							Increasing Temperature

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Liebert TM-10098 service manual Glycool at 100% Capacity – No Dead Band, iCOM Control Training and Service Manual

Contents

Environmental Training and Service Manual TM-10098:Rev. 02/06Large Systems iCOM Microprocessor iCOM Training & Service ManualiCOM Control Training and Service Manual Page iCOM Control Training and Service Manual Table of ContentsChapter 1 Temperature/ Humidity Control Chapter 4: General Troubleshooting Data Chapter 2: Programming FunctionsChapter 3: iCOM Hardware Connections iCOM Controls Training and Service Manual How To Use The Schematics Electrical SchematicsGlossary of Terms Computer and Network Terms Chapter Temperature and Humidity Control Programs Temperature Control Program TypesCooling and/ or Heating Required, in Percent % iCOM Controls Training and Service Manual iCOM Control Training and Service Manual MembershipKnowledge Base/Decision Making Consequence Proportional + Integral PI Control iCOM Controls Training and Service ManualProportional P Control iCOM Control Training and Service Manual Proportional + Integral + Derivative PID Control iCOM Controls Training and Service Manual A suggested tuning procedure is as follows iCOM Control Training and Service Manual Operations and ChartsTemperature Control 2 Stage Compressorized Cooling – No Dead Band Temp Set Point + 1/2 Proportional Band iCOM Control Training and Service Manual 2 Stage Compressorized Cooling – With Dead Band STAGECOMPRESSORS, UNLOADER STATE 4 Stage Compressorized Cooling – No Dead Band Temp Set Point + 1/2 Proportional Band STAGE TEMPERATURE iCOM Controls Training and Service Manual4 Stage Compressorized Cooling – With Dead Band iCOM Control Training and Service Manual 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 Controls Training and Service Manual 1 compressor operation Switch 2ndSwitch 1st compressor ON compressor ON iCOM Control Training and Service Manual Glycool at 100% Capacity – No Dead Band Dual Source Cooling iCOM Controls Training and Service ManualGlycool at 50% Capacity – No Dead Band Dual Cooling at 100% Capacity – No Dead Band Staged Electric Reheat Temp Set Point - 1/2 Proportional Band iCOM Controls Training and Service Manual3 Stage Electric Reheat – No Dead Band 3 Stage Electric Reheat - With Dead Band Humidity Control Humidity Control Program Types iCOM Control Training and Service Manual HumidityHumidity Proportional Operations and Charts Humidifier OperationiCOM Controls Training and Service Manual Relative Humidity Control Humidity Set Point - 1/2 Proportional Band iCOM Control Training and Service ManualInfrared Humidification – No Dead Band iCOM Controls Training and Service Manual Infrared Humidification – With Dead Band iCOM Control Training and Service Manual Autoflush Control Flow Chart Dehumidification Operation Humid Set Point: 50% iCOM Controls Training and Service Manual Humidity Set Point + 1/2 Proportional Band Reheating during Dehumidification No Normal Delayed iCOM Controls Training and Service ManualParameterOperation Additional Programs StartAuto restart iCOM Control Training and Service Manual Fan Alarm / Fan settings High Pressure CutoutSuction Pressure Transducer Call for Cooling iCOM Control Training and Service Manual The Startup and Freeze Protection Program Next Maintenance Calculation iCOM Controls Training and Service ManualCalculation of next Maintenance Parameters The Maintenance Calculation is done as follows iCOM Control Training and Service Manual Parameters for next Maintenance CalculationGeneral Maintenance Settings Shared Parameters an understanding iCOM Control Training and Service Manual Networking and FunctionsUnderstanding the iCOM Network setup process The Basics for Hardware The Basics for Cooling Unit PlacementiCOM Controls Training and Service Manual The Basic for Programming iCOM Control Training and Service Manual Example: Display: Example: Control Board: Setting Parameters iCOM Controls Training and Service ManualUnit No. Unit No. iCOM Control Training and Service Manual PowerSwitch Unit No. iCOM Controls Training and Service Manual U2U:Switc iCOM Control Training and Service Manual Line S802: Number units connected: xx 01 - Teamwork iCOM Controls Training and Service ManualTeamwork Modes “No” Teamwork Unit Lead/ Lag or Running/ Standby Function iCOM Control Training and Service ManualTeamwork Mode Typical Lead/ Lag Running/ Standby Function iCOM Controls Training and Service Manual Standby & Cascade Notes iCOM Control Training and Service Manual Chapter Programming FunctionsSmall Graphic Display with Panel Mount Bezel Optional Large Graphic Display with Panel iCOM Control Training and Service Manual iCOM Display Components and FunctionsiCOM Keyboard Layout iCOM Controls Training and Service Manual iCOM Keyboard LayoutIcon Key Name iCOM Display Symbols/ Icons iCOM Control Training and Service Manual Programming Functions Status Display Menu Screens ICON Symbols Menu Parameters Names iCOM Control Training and Service ManualLevel 2: Service Level 1: User User Menu Icons and Descriptions iCOM Controls Training and Service ManualIcon Name Service Menu Icons and Descriptions C/ F Menu Parameters Advanced Menu Icons and DescriptionsUser Menu Parameters iCOM Controls Training and Service Manual Default User Menu: Spare Parts List, Large Display OnlyUser Menu: Set Point Parameters U100 series Menu Line iCOM Controls Training and Service Manual DefaultUser Menu: Graphics Parameters Parameter User Menu: Set Alarm Parameters U200 series DefaultMenu Line Parameter iCOM Controls Training and Service Manual User Menu: Active Alarms Parameters ParameterUser Menu: Display Setup Parameters U400 series Default iCOM Control Training and Service Manual DefaultUser Menu Total Run Hours Parameters U500 series Menu Line iCOM Controls Training and Service Manual User Menu: Service Contacts U700 seriesMenu Line Parameter Service Menu Parameters iCOM Control Training and Service ManualDefault Menu Line Default Service Menu: Unit Diary Log ParameterMenu Line Parameter iCOM Control Training and Service Manual DefaultDefault Menu Line Default DefaultMenu Line Parameter iCOM Control Training and Service Manual DefaultDefault Menu Line iCOM Controls Training and Service Manual DefaultDefault Parameters: Page 6 of iCOM Control Training and Service Manual DefaultMenu Line Parameter iCOM Controls Training and Service Manual Menu LineParameter Range iCOM Control Training and Service Manual Menu LineParameter Range Default Service Menu Set Alarm ParametersDefault Menu Line iCOM Control Training and Service Manual Service Menu: Set Alarm Parameters: Page 3 ofService Menu Set Alarm Parameters Menu Line iCOM Controls Training and Service Manual Service Menu: Set Alarm Parameters: Page 5 ofService Menu Set Alarm Parameters Menu Line iCOM Control Training and Service Manual Menu LineParameter Range iCOM Controls Training and Service Manual DefaultDefault Menu Line iCOM Control Training and Service Manual DefaultDefault Menu Line iCOM Controls Training and Service Manual DefaultDefault Menu Line iCOM Control Training and Service Manual DefaultDefault Menu Line Advanced Menu Parameters iCOM Controls Training and Service ManualMenu Code Parameter iCOM Control Training and Service Manual DefaultDefault Menu Code iCOM Controls Training and Service Manual DefaultDefault Menu Code Default Menu CodeParameter Range Default Menu CodeParameter Range Events Notifications Parameters iCOM Control Training and Service ManualType Description Large Display Events Notifications Parameters continued iCOM Controls Training and Service ManualType Description Large Display iCOM Control Training and Service Manual Events Notifications Parameters continuedType Description Large Display Events Notifications Parameters continued Event ID number, Description and FunctioniCOM Controls Training and Service Manual Default iCOM Control Training and Service Manual LOSS OF iCOM Controls Training and Service Manual HUM HRS Unit COMP iCOM Control Training and Service Manual DIG SCROLL2 UNIT CODE iCOM Control Training and Service Manual MISMATCH Chapter Control Board ConnectionsIntroduction iCOM Controls Training and Service Manual Large Disdplay Small Display LCD Display BoardiCOM Control Training and Service Manual iCOM Controls Training and Service Manual Control Board DIP Switches and Plug ConnectorsUnit Mounted Control Board iCOM Control Training and Service Manual iCOM Control Board DIP Switch #2 SettingsConnector Setting iCOM Controls Training and Service Manual iCOM Control Board Jumper SettingsSetting Default Setting Large Display Jumper Settings SettingDefault Setting Small Display DIP Switch #3 Settings iCOM Controls Training and Service Manual Small Display Jumper SettingsSetting Default Setting DS Systems iCOM Control Training and Service ManualP4 24 VAC Power P8: 24 VAC Alarm Inputs iCOM Controls Training and Service Manual P22 Glycool Valve Std. Pressure ActuatorP32: Compressor Devices P33: Compressor Devices iCOM Control Training and Service Manual P38 Smoke DetectorP39: Firestat & Remote Shutdown P40: Basic Unit Connections iCOM Controls Training and Service Manual P65: Optional Intelleslot Power SupllyP64: Unit Large Display Digital Signals P66: Unit Small Display Digital Signals Fuse Board Layout: All Units iCOM Control Training and Service ManualP4: 24 VAC Power P41: 24 VAC Power Temperature/ Humidity Board: All Units iCOM Controls Training and Service ManualTemperature/ Humidity Assembly Housing Temperature/ Humidity Board NOTES iCOM Control Training and Service Manual General Troubleshooting Data ChapterC P U iCOM Controls Training and Service Manual Areas of Control IsolationiCOM Control Training and Service Manual BASIC OPERATION OF THE TRIAC iCOM Controls Training and Service ManualSemiconductor Semiconductor Showing No Movement of Electrons Front and Left Side Views of the Triac iCOM Control Training and Service ManualSchematic Drawing for the Triac Input Opto-Isolator Basic Operation of the Opto-IsolatorOutput Opto-Isolator Troubleshooting the Output Opto-Isolator iCOM Control Training and Service ManualOutput Opto-IsolatorPin Location OUTPUT VOLTAGE CHECK Troubleshooting the Input Opto-Isolator iCOM Controls Training and Service ManualInput Opto-IsolatorPin Location INPUT VOLTAGE CHECK Alarm Input Opto-IsolatorLegend Microprocessor Control BoardiCOM Control Training and Service Manual Opto Control Output Opto-IsolatorLegend Control Output Triac LegendiCOM Controls Training and Service Manual Opto iCOM Diagnostics / Service Mode Program iCOM Control Training and Service Manual Basic Troubleshooting Steps iCOM Controls Training and Service ManualProgramming DC Voltage check iCOM Control Training and Service Manual If 24 VAC is present perform the following Moisture Content Charts iCOM Controls Training and Service Manual iCOM Control Training and Service Manual Moisture Content at Temperature = 80F 26.7ºCGrains Per Cu Ft Grains Per Lb iCOM Controls Training and Service Manual Moisture Content at Temperature = 79F 26.1ºCGrains Per Cu Ft Grains Per Lb iCOM Control Training and Service Manual Moisture Content at Temperature = 78F 25.6ºCGrains Per Cu Ft Grains Per Lb Grains Per Lb Moisture Content at Temperature = 77F 25.0ºCGrains Per Cu Ft Grains Per Lb Moisture Content at Temperature = 76F 24.4ºCGrains Per Cu Ft iCOM Controls Training and Service Manual Moisture Content at Temperature = 75F 23.9ºCGrains Per Cu Ft Grains Per Lb Grains Per Lb Moisture Content at Temperature = 74F 23.3ºCGrains Per Cu Ft iCOM Controls Training and Service Manual Moisture Content at Temperature = 73F 22.8ºCGrains Per Cu Ft Grains Per Lb iCOM Control Training and Service Manual Moisture Content at Temperature = 72F 22.2ºCGrains Per Cu Ft Grains Per Lb Grains Per Lb Moisture Content at Temperature = 71F 21.7ºCGrains Per Cu Ft iCOM Control Training and Service Manual Moisture Content at Temperature = 70F 21.1ºCGrains Per Cu Ft Grains Per Lb iCOM Controls Training and Service Manual Moisture Content at Temperature = 69F 20.6ºCGrains Per Cu Ft Grains Per Lb iCOM Control Training and Service Manual Moisture Content at Temperature = 68F 20.0ºCGrains Per Cu Ft Grains Per Lb Grains Per Lb Moisture Content at Temperature = 67F 19.4ºCGrains Per Cu Ft iCOM Control Training and Service Manual Moisture Content at Temperature = 66F 18.9ºCGrains Per Cu Ft Grains Per Lb iCOM Controls Training and Service Manual Moisture Content at Temperature = 65F 18.3ºCGrains Per Cu Ft Grains Per Lb Suction Transducer Information Codes A124-A128 iCOM Control Training and Service Manual iCOM Controls Training and Service Manual Digital Scroll High Temperature Sensor ChartNTC Code S606 and S608 FACTORY SERVICE TECHNICIAN Unit Code DescriptioniCOM Control Training and Service Manual Troubleshooting Checklist iCOM Controls Training and Service Manual Glossary of Unit and System Parameters User Menu iCOM Control Training and Service ManualSet Alarms Code iCOM Controls Training and Service Manual Display SetupTimer Code Service Menu Service contactsStandby settings / Lead-lag Wellness / General Settings iCOM Controls Training and Service Manual Fan SettingsCompr. 1 Settings Compr. 2 Settings El. Heater 3 Settings Humidifier SettingsDiagnostics / Service Code iCOM Controls Training and Service Manual Set AlarmsCode Type iCOM Control Training and Service Manual System / Network SetupOptions Setup Code Advanced Menu iCOM Controls Training and Service ManualService contacts Factory Settings Code iCOM Control Training and Service ManualAccess Glossary of Terms iCOM Controls Training and Service Manual iCOM Control Training and Service Manual Hysteresis: Differential iCOM Controls Training and Service Manual Input: An incoming information signal iCOM Control Training and Service Manual Prefill: The period of time between when the water begins to fill the pan and the humidifier lamps turn on Computer and Network Terms iCOM Controls Training and Service Manual 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 iCOM Controls Training and Service Manual •the type of error checking to be used iCOM Control 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 Controls 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: Network Information iCOM Control Training and Service ManualWhat is networking?… HUBS AND SWITCHES Twisted pair - 10baseT - UTP Cable iCOM Controls Training and Service ManualUNIT IDENTIFICATION OR ADDRESSING How To Use The Schematics iCOM Control Training and Service Manual 182769 Liebert DS iCOM Global Control 8 - 12 Ton Electrical SchematicsiCOM Controls Training and Service Manual iCOM Control Training and Service Manual