Liebert® iCOM® User Manual -Intelligent Communications & Monitoring for Liebert Challenger 3000™, Liebert Challenger ITR™ , Liebert CW™, Liebert DS™ Liebert PeX™ with Software Version PA2.01.029.
TABLE OF CONTENTS 1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 LIEBERT ICOM DISPLAY COMPONENTS AND FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . .2 2.1 System Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.9 Liebert Optimized Aisle Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 3.9.1 3.9.2 3.9.3 3.10 Event Types and Properties. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 3.10.1 3.10.2 3.10.3 3.10.4 3.10.5 3.11 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Supply Temperature Control . . . .
7.4 User-Sensor Data Menu Screens. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 7.5 User-Display Setup Menu Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 7.6 User-Total Run Hours Menu Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117 7.7 User-Sleep Mode Menu Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 Figure 31 Figure 32 Figure 33 Figure 34 Figure 35 Figure 36 Figure 37 Figure 38 Figure 39 Figure 40 Figure 41 Figure 42 Figure 43 Figure 44 Figure 45 Figure 46 Figure 47 Figure 48 Figure 49 Figure 50 Figure 51 Figure 52 Figure 53 Figure 54 Figure 55 Figure 56 Figure 57 Figure 58 Figure 59 Figure 60 Figure 61 Figure 62 Figure 63 Figure 64 Figure 65 Figure 66 Figure 67 Figure 68 Figure 69 Figure 70 Temperature
Figure 71 Figure 72 Figure 73 Figure 74 Figure 75 Figure 76 Figure 77 Figure 78 Figure 79 Figure 80 Figure 81 Figure 82 Figure 83 Figure 84 Figure 85 Figure 86 Figure 87 Figure 88 Figure 89 Figure 90 Figure 91 Figure 92 Figure 93 Figure 94 Figure 95 Figure 96 Figure 97 Figure 98 Figure 99 Figure 100 Figure 101 Figure 102 Figure 103 Figure 104 Figure 105 Figure 106 Figure 107 Figure 108 Figure 109 Figure 110 Figure 111 Figure 112 Figure 113 Figure 114 Figure 115 Figure 116 Figure 117 Figure 118 Figure 119 Fi
Figure 121 Figure 122 Figure 123 Figure 124 Figure 125 Figure 126 Figure 127 Figure 128 Figure 129 Figure 130 Figure 131 Figure 132 Figure 133 Figure 134 Figure 135 Figure 136 Figure 137 Figure 138 Figure 139 Figure 140 Figure 141 Figure 142 Figure 143 Figure 144 Figure 145 Figure 146 Figure 147 Figure 148 Figure 149 Figure 150 Figure 151 Figure 152 Figure 153 Figure 154 Figure 155 Figure 156 Figure 157 Figure 158 Figure 159 Figure 160 Figure 161 Figure 162 Figure 163 Figure 164 Figure 165 Figure 166 Welln
TABLES Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 Table 10 Table 11 Table 12 Table 13 Table 14 Table 15 Table 16 Table 17 Table 18 Table 19 Table 20 Table 21 Keyboard icons and functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 User menu icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Service menu icons . . . . . . . . .
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Introduction 1.0 INTRODUCTION The Liebert iCOM offers the highest capabilities in unit control, communication and monitoring of Liebert mission-critical cooling units. Liebert iCOM may be used to combine multiple cooling units into a team that operates as a single entity, enhancing the already-high performance and efficiency of Liebert’s units. Liebert iCOM is available as a factory-installed assembly or may be retrofitted on existing products with SM, AM or AG controls.
Liebert iCOM Display Components and Functions 2.0 LIEBERT ICOM DISPLAY COMPONENTS AND FUNCTIONS The small and the large display have a common key layout, as shown in Figure 2. Figure 2 Liebert iCOM display components Liquid Crystal Display LED Status Indicators (top LED is red or flashing red; bottom LED is green or amber) ? ESC Large Liebert iCOM Display shown - Keypad and LEDs are identical on all displays.
Liebert iCOM Display Components and Functions Table 1 Icon ? ESC Keyboard icons and functions Key Name Function On/Off Key Begins Shutdown or Startup. Alarm Key Silences/Resets an alarm. Help Key Accesses integrated help menus. ESCape Key Returns to the previous display view. Enter Key Confirms all selections and selects icons or text. Increase Key (Up Arrow) Moves upward in a menu or increases the value of a selected parameter.
Liebert iCOM Display Components and Functions Figure 3 Status menu, large display, graphical view Return Air Temperature Setpoint Return Air Humidity Setpoint Return Air Humidity Return Air Temperature System or Unit # view Supply Air Temperature (optional) Evaporator Fan Speed Percent Hot Water Heating Percent Electric Heating Percent Cooling Free-Cooling Percentage Percent Dehumidifying Percent Humidifying Next Maintenance System (or Unit) On/Off Date and Time Most Recent Log Events (Date, T
Liebert iCOM Display Components and Functions Figure 5 System screen with rack view of sensors System Screen will indicate if Teamwork is turned On and which teamwork mode is currently set within the control. This system screen displays the unit operation by displaying the average of all active components from each unit within the system.
Liebert iCOM Display Components and Functions 2.2 Main Unit Screen The temperatures shown at the top of the main unit screen are determined by the configuration of the Liebert iCOM. The values are based on which sensors are used for controlling airflow, cooling capacity and humidification. The data at the upper left of the screen can be either average or maximum rack temperature, depending on the selection in the Remote Sensors Mode.
Liebert iCOM Display Components and Functions The User menu contains the most frequently used features, settings and status information. The Service menu contains settings and features used to set up unit communications and for unit maintenance. The Advanced menu contains settings used to set up the unit at the factory. Do not attempt to make any changes in the Advanced menu without consulting the factory first. NOTE Menu settings may be viewed without a password, but changing settings requires a password.
Liebert iCOM Display Components and Functions Figure 9 Navigation from system screen to unit screen to rack view—single unit Figure 10 Navigation from system screen to unit screen to rack view—system view Liebert® iCOM® 8
Liebert iCOM Display Components and Functions Accessing Submenus on Small Displays For navigating to submenus while at the main menu (User, Service or Advanced), use the up and down arrow keys to scroll through the icons page-by-page. To scroll through the icons one-by-one, press the enter key and then use the up and down arrow keys. With the desired icon highlighted, press the enter key to enter that submenu. Once in a Submenu, a list of menu items, each with its associated parameter, is displayed.
Liebert iCOM Display Components and Functions 2.3.3 Entering a Password The password must be entered before any value of the menu item parameter can be changed. There are three levels of password for preventing unauthorized changes. 1. User menu password allows the operator the ability to change the parameters in the User menu. The User menu password is 1490. 2. Service menu password enables the operator to changes parameters in both Service and User. The Service menu password is 5010. 3.
Liebert iCOM Display Components and Functions Figure 12 Menu tree—Large display, stand-alone Unit 1 will be displayed in the top left corner of the screen.
Liebert iCOM Display Components and Functions 2.3.4 Viewing Multiple Units with a Networked Large Display When you first wake up the control, press the Esc key to return to the System view Status menu. This view shows an average of all the units on the network and any alarms present. To view a specific unit on the network, press either the Enter key or down arrow key. When you do this, you will see the word System in the top left of the screen change to a unit number.
Liebert iCOM Display Components and Functions Figure 14 User menu icons User Menu password: 1490 Table 2 User menu icons Icon Name °C / °F % RH SET EVENT LOG SET ALARMS ! Description Available On Display Setpoints View and change temperature and humidity setpoints Small & Large Spare Part List Displays the various part numbers of the components/parts in the cooling unit Large Event Log Contains last 400 events Small & Large Graphics Displays temperature and humidity graphs Small & La
Liebert iCOM Display Components and Functions Table 2 User menu icons (continued) Icon Name 1234h Description Available On Display Total Run Hours Records the run time of all components and allows setting of limits on run time Small & Large Sleep Mode Allows setback settings for non-peak operation Small & Large Service Contact Info Contains key contact information for local service, including names and phone numbers Small & Large Condenser Timer Displays the timer settings for the Liebert
Liebert iCOM Display Components and Functions Table 3 Service menu icons (continued) Icon Name Description Available On Display Diagnostics/ Service Mode Allows troubleshooting, manual mode, read analog and digital inputs Small & large Set Alarms Allows enable, disable and settings for alarms Small & large Sensor Calibration/Setup Allows calibration of sensors Small & large System/Network Setup Allows setup and U2U communication for multiple units Small & large Options Setup Allows setup
Operation 3.0 OPERATION The Liebert iCOM display provides viewing, trending and configuration capability for Liebert cooling units. All unit settings and parameters can be viewed and adjusted through three menus: User, Service and Advanced. All active alarms are displayed on the LCD and annunciated. The control is shipped from the factory with default selections for all necessary settings. Adjustments can be made if the defaults do not meet your requirements.
Operation The effect of pressing the On/Off key on a large display connected to a network depends on the view: System or Unit. • In System view, pressing the On/Off key shows a warning asking for confirmation to shut down the entire system. • In Unit view, pressing the On/Off key affects only the unit being viewed, without a confirmation request. Each time a unit is powered On or Off, an event is added to the Event Log in the User menu.
Operation Variable Speed Fans—EC or Variable Frequency Drives The Liebert iCOM control can adjust airflow manually through a BMS or dynamically using locally installed temperature sensors. Parameters related to VSD fan speed setting can be found in the Service Menu > Setpoints submenu on page 5 of 8. This menu allows the cooling unit's fan motor speed to be configured and adjusted for a variety of applications by selecting which sensor controls the fan speed.
Operation Minimum Fan Speed Depending on the product control design, there may be an internal minimum speed, as defined by that specific product operation. Minimum fan speeds are defined below. • Liebert DS™ units with pressure transducers 70% • Liebert CW™ units 60 -100% (available option to 25%) • Liebert Deluxe System\3™ units with low-pressure switches limited to 80% Contact your local Emerson dealer for more information if fan speed minimum settings must be lowered from the values above.
Operation 3.1.2 Back-Draft Fan Damper—Units with EC Fans Only The Liebert iCOM controller has the ability to operate EC fans at very low speed to effectively act as a back-draft damper. The power used to prevent air flow from entering a standby unit from the raised floor by spinning the fans at a low speed is much less expensive than the additional static that conventional mechanical dampers introduce while the unit is in operation.
Operation 3.1.3 General Compressor Requirements Low-Pressure Time Delay When the compressor starts, the low-pressure input is ignored for a selected period of time based on the setting of the Low Pressure Alarm Delay (Service Menu, Options Setup). This time is usually set to 3 minutes on air-cooled units, and to 0 or 1 minute on water cooled units. When this time is expired, a second timer starts to operate if the low-pressure input is active.
Operation Pump Down NOTE The default setting for Pump Down is YES. The function is not available on all units. Emerson removed pump down control from Thermal Management products in 2011. Units shipped in 2011 and before may have pump down enabled. Pump Down is applicable to compressorized systems that are equipped for pump-down operation, which is set at the factory.
Operation Setting the counter to 0 will auto-reset the alarm without the need of pressing the reset button on the display. Even if the pressure in the system drops below the alarm point, the compressor will remain Off until the system is reset.
Operation 3.1.6 Motorized Ball Valve in Water-Cooled Units On water/glycol-cooled units with digital scroll compressors), pressure changes during each digital cycle during unloaded operation. This rapid pressure change would cause a conventional water regulating valve to open and close an excessive number of times. Excessive valve cycling is avoided on units with digital scroll compressors) by monitoring a liquid line transducer and regulating heat exchanger fluid flow with a motorized ball valve (MBV).
Operation 3.2 Temperature Control—Single Source Cooling (No Extra Cooling Coil) 3.2.1 Temperature Proportional Band The control uses the temperature proportional band to determine which operation to perform (cooling/heating) and how much capacity to provide. The Temperature Proportional Band is a userdefined range that is divided into two equal parts for cooling and heating. The Temperature Setpoint is between these two equal parts.
Operation 3.2.2 Compressor Control Depending on its type, a Liebert cooling unit may have one or two compressors with or without unloaders or variable capacity. Compressor Proportional Bands One Single-Step Compressor Without Unloaders—One-Step One single-step compressor, Cool 1, is started at 100% call for cooling from the temperature proportional band and stopped at 0% (see Figure 22).
Operation Two Compressors With Unloaders—Four-Step The first two-step compressor is started unloaded at 33% calculated output from the temperature proportional band and stopped at 17%. At 80%, Compressor 1 will be loaded, at 70% unloaded. The second compressor starts unloaded at 63% and stops at 47%. At 100%, Compressor 2 will be loaded, at 90% unloaded (see Figure 24).
Operation On single and dual digital scroll compressor systems, the first compressor is started at 25% calculated output from the temperature proportional band and stopped at 10%. On dual digital scroll compressor systems, the second compressor is started at 35% and stopped at 20%, see Figure 26. When a compressor is started, the solenoid is energized longer than it is de-energized to match the call for cooling.
Operation Figure 27 DIP switch locations on Liebert iCOM control board 6. P68 must have a jumper placed between the top and bottom two pins on the left side and one placed between the top and bottom pins on the right side, the two middle pins should be left unconnected. 7. Go to Service/Diagnostics Service Menu and find S379. Set this option to Feedback and note that S380 will go to Yes and S381 will go to Ongoing. If Feedback is already selected, then go to line S380 and manually select Yes.
Operation 3.3 Temperature Control—Second Cooling Source Two types of secondary source cooling models are offered, GLYCOOL and Dual-Cool. GLYCOOL models are two-pipe systems. This means that two pipes enter the unit and feed the chilled water/free-cooling coil as well as the compressor(s) heat exchanger (eg., Liebert Paradenser™, tube-in-tube condenser or brazed plate heat condenser). Dual-Cool units can be two-pipe or four-pipe.
Operation Figure 29 Second cooling source and two-step compressorized cooling Temp Setpoint: 70°F Proportional Band: 8°F Deadband: 2°F Valve Closed Valve 100% Open 0% Cooling 71 Cool 2 On + 100% Cooling ½ Deadband 70 Cool 1 On 2nd Source 72 73 74 Comp 75 76 77 78 ½ Proportional Band ½ Proportional Band nd Band 2: Compressors Band 1: 2 Source 79 + 200% Cooling Increasing Temperature Minimum Chilled Water Temperature—This feature allows the user to select a minimum chilled water tem
Operation GLYCOOL™ Cooling—Free-Cooling GLYCOOL units may be programmed to stage cooling components two ways. • Operate free-cooling or compressor(s) to maintain temperature (factory default). • Operate free-cooling and compressor(s) simultaneously. Caution must be taken when operating free-cooling and compressor simultaneously on GLYCOOL units. Adequate flow must be provided to the unit to prevent high pressure when 100% free-cooling is required in addition to DX cooling.
Operation 3.3.2 Outdoor Air and Return Air Temperature and Humidity Sensor Connections The Liebert Air Economizer™ ships with sensors to determine the temperature and humidity of return air and outdoor air. The sensors and wiring to connect them are in boxes inside the Liebert Air Economizer: • Outdoor air sensor • Return air sensor • Supply air thermistor (factory-connected to the main interface board) These must be installed and connected to the primary cooling unit.
Operation Figure 32 Supply limit thermistor wiring and restricted airflow switch location Locations for Liebert DS™ and Liebert CW™ units shown. Note location for your unit. 120" Frame, Chilled Water Restricted Airflow Switch Location Liebert DS + CW026-CW084 Restricted Airflow Switch Location P13 FactoryConnected E P13 FactoryConnected Uncoil and Extend Cable Through Holes Provided in Bottom of Unit ge w-volta sible lo own. s o p sh Both rtments lies.
Operation 3.3.3 Adjust the Restricted Airflow Switch on the Liebert Air Economizer™ The restricted airflow switch inside the cooling unit must be adjusted for the Liebert Air Economizer to operate properly and efficiently. To adjust the switch: 1. 2. 3. 4. 5. 6. 7. 8. 9. Inspect all connections, restore power to operate the unit’s blower. Go to the Service Menus, Diagnostic / Service Mode. Enter the Service Menu password 5010. Enable manual mode on line S313. The unit will shut Off.
Operation 3.4 Liebert Air Economizer™ Operation Liebert cooling units control the Liebert Air Economizer with the analog outputs of the Liebert iCOM control. The Liebert iCOM can be used with a Liebert Air Economizer or with a previously installed Liebert Air Economizer equipped with 0-10VDC or 2-10VDC dampers. The Liebert iCOM is capable of driving two independent damper motors or can be set up through the software to output a single signal where the dampers are inversely driven.
Operation NOTICE Risk of improper operation. Can cause degraded cooling and ventilation operation because of improper building air pressure. The incoming air from the outside damper requires expelling an equal volume of air through a field-provided powered relief air vent. The volume that must be expelled will vary from 0 to 80% of the total airflow for all Liebert Air Economizer™ units.
Operation 3.4.2 Liebert Air Economizer™ System Overview Controller settings will vary depending on the application. The objective of all settings is the same: to expel warm air from the conditioned space and bring in cooler air through the Liebert Air Economizer. This function is monitored continuously by the Liebert iCOM that controls the Liebert Air Economizer. Figure 34 shows an example of the air flow pattern of a Liebert Air Economizer system.
Operation Figure 35 Air flow pattern of a Liebert Air Economizer system-dropped ceiling Outdoor Damper Roof Outdoor Temperature /Humidity Sensor Indoor Temperature/Humidity Sensor Outside Air Duct Indoor Damper Mixing Box Return Room Air Ceiling Pressure Relief Vent Liebert Air Economizer (Not by Emerson) CRAC Liebert iCOM Equipment Rack Hot Aisle Equipment Rack Cold Aisle Hot Aisle Front of Unit Supply Sensor 5-15ft. (1.5 to 4.
Operation Out of Service When the Liebert Air Economizer™ is not operating, the outside air damper is closed, the return air damper is open and the relief air vent fan is shut down. This permits air from the conditioned space to be drawn into the primary cooling unit, cooled and expelled into the conditioned space. The relief air vent is not required while the Liebert Air Economizer is not in service because no air volume is being brought into the conditioned space.
Operation Figure 36 Liebert DS™ setpoints screen, page 4 of 9 S135 DT1 (Room / Outdoor) Type—Sets the activation point of the ambient dry bulb outdoor temperature as it relates to either an indoor actual temperature or temperature setpoint. If set to “Temp,” the outdoor dry bulb temperature is compared to the return temperature actual value. If set to “Set,” the outdoor dry bulb temperature is compared to the return temperature setpoint.
Operation S136 DT1 (Room / Outdoor) Value—Field-adjustable setpoint or temperature. The type (setpoint or temperature) is based on the setting on S135. S137 DT2 (Room / FC Fluid) Type—Determines the method to activate the water circuit on dualcool and free-cool units. When this parameter is set to “Contact,” a dry contact closure can be used to activate the free-cooling circuit.
Operation SA06 Outdoor Temperature—Displays the actual outdoor temperature based on the Temperature Humidity sensor (Sensor C). When this parameter shows OK, the outdoor temperature requirements have been met to use economization. When NOK is shown, the outdoor temperature is outside the operating range set in the Liebert iCOM control. SA07 Stop ECO at Setpoint + —Sets the temperature when the Liebert Air Economizer will be disabled due to an increasing outdoor air temperature.
Operation Figure 39 Damper settings and limits screen Parameters SA24 through SA30 of the Liebert Air Economizer screen show the return and outdoor damper limits and current position. The return damper will receive a 2VDC signal when fully open and an 8-10VDC signal at its most-closed position. The outdoor damper will receive a 10VDC signal when fully open and a 2VDC signal when fully closed.
Operation Liebert Air Economizer Variable Speed Fan Operation (VFD and EC Fan) Upon startup after a loss of power to the Liebert iCOM control board, the main fan will operate at 100% for the first 5 minutes of operation. After running at 100% for 5 minutes, the standard fan control will be able to modulate the fan. For other control modes, refer to Variable Speed Fans—EC or Variable Frequency Drives on page 18. 3.4.
Operation 3.5.1 Electric, Hot Gas and Hot Water Reheat Different types of cooling units feature different types of standard electrical heating. Not all types offer hot gas or hot water reheat. The number of electrical heating stages also varies—some types of cooling units have single-stage electrical heating as standard and offer two-stage electrical heating as an option. Other types feature three-stage heating as standard.
Operation 3.5.2 SCR Reheat SCR reheat is a type of electric reheat that provides tighter temperature control than staged electric reheat. SCR reheat capacity modulation is achieved by pulsing the reheat On and Off. Full capacity is achieved by constantly energizing the reheat. Units equipped with SCR reheat can operate in Tight or Standard mode. By default, cooling units with SCR reheat are factory-set to operate in Tight mode.
Operation Standard Mode In Standard mode, the SCR reheat operates only when the Temperature Proportional Band calls for heating. SCR reheat output is adjusted proportionally as the Temperature Proportional Band varies the requirement for heating from 0% to -100%. Compressors operate only when there is a call for cooling as described in 3.2.2 - Compressor Control. Figure 43 illustrates how SCR reheat operates when SCR Control Type is set to Standard mode.
Operation When the return air humidity deviates from the setpoint, either dehumidification or humidification is activated. If the return air humidity increases, the control calls for 0% (none) to 100% (full) dehumidifying capacity, based on how far the humidity penetrates the dehumidification portion of the proportional band.
Operation Steam Generating Canister Humidifier The Steam Generating Humidifier has its own separate control board that manages the canister and steam rate. Liebert iCOM sends an On-Off command to relay a call for humidification. 3.6.2 Dehumidification The Dehumidification Enable parameter (Service Menu, Options Setup) allows for enabling/disabling the dehumidification function. A call for dehumidification is calculated in the same way as a cooling request.
Operation Figure 46 Dehumidification and reheat control bands 33% -100% Step 2 off Step 1 on Step 3 off Step 2 on 33% -Temp Step 1 Dehum Reheat Prop Band -100 % Step 3 33% Step 2 -Temp Step 1 off 33% Step 3 Step 3 on Step 2 off Step 1 on Step 3 off Step 2 on Step 3 on 33% 0% Dehum/ Reheat Setpoint Step 1 off 33% Step 2 Heater Deadband Step 1 Dehum Reheat Prop Band 0% 0% Dehum/ Reheat Setpoint Low Limit 1 and Low Limit 2 are used to avoid overcooling a room during dehumidificat
Operation Dehumidification Compressor Quantity Under Factory Settings in the Advanced menu there is an item called Dehumidification With Comp. This will be set to either 1, 2, 1 or 2, or BOTH. This setting determines which compressors are used for dehumidification. It also determines if Low Limit 1 will be available and impacts how the reheats will operate during dehumidification.
Operation 3.7 Control Types 3.7.1 Temperature and Humidity Control Types The Liebert iCOM has three Temperature and Humidity Control Types: • Proportional • PI • Intelligent Each control type affects the timing and intensity of the cooling/heating and humidifying/dehumidifying operations. The Control Type parameter is in the Service menu under Setpoints.
Operation The integration (I) time works with the proportional band in PI Control to stage call for cooling before the actual temperature increases far above the temperature setpoint. The “I” portion does this by doubling the current “P” deviation for every time the “I” has elapsed. Example: If the “P” deviation is 50% within the “I” time (e.g., 5 min), the call for cooling will be doubled, giving 100% in 5 minutes. While this happens, the real temperature “P” deviation will decrease.
Operation Compensated—The actual return air humidity sensor reading is sent to the Temperature and Humidity Control where the Humidity Setpoint is adjusted based on how much the return room air temperature deviates from the desired temperature setpoint. The adjusted humidity setpoint is used for humidification percent requirement determination.
Operation 3.8 Supply Control The supply temperature sensor should be placed in an area that is influenced only by the unit it is connected to. The Supply Air sensor can be used to control or reference the discharge air temperature of the cooling unit. This sensor can be added to existing Liebert iCOMs by purchasing the supply sensor and wiring harness. The supply air sensor must be connected to P13 pins 1 & 2. Contact your local Emerson representative for pricing and installation.
Operation 3.9 Liebert Optimized Aisle Control The Liebert iCOM Optimized Aisle Control has been developed for Liebert DS™, Liebert CW™, Liebert Challenger 3000™, Liebert PEX™ and Liebert HPM™ units to take advantage of the variable fan speed (EC or VFD Fans) and variable capacity (Chilled Water, 4-Step and Digital Scroll) components that are available on these units.
Operation 3.9.2 Supply Temperature Control The Liebert iCOM monitors and adjusts the supply (discharge) air temperature of the unit to provide a consistent under-floor air temperature by adjusting the compressor capacity or chilled water valve position. The supply temperature control operates the cooling capacity independently of the air flow that is controlled from the inlet rack temperature.
Operation Figure 49 Return Compensation in Unit View Return Compensation in Unit View Figure 50 Return Compensation control band S115 Return Compensation Value New air temperature setpoint modified by compensation Temperature Setpoint (Sensor set to either Supply Sensor or Remote Sensor ) -100% S115 Return Compensation Band S114 Return Compensation Setpoint 59 Liebert® iCOM®
Operation The return compensation setpoint will proportionally increase as the return temperature deviates below S114 “Return Compensation Setpoint.” The compensation proportional band is set on line S115. The compensating proportional band defines the maximum value the air temperature setpoint will increase during return compensation. See Figure 50.
Operation When supply air compensation has been invoked, it will be indicated on the unit view by a small downward-pointing arrow. See Figure 53. Figure 53 Supply Compensation in Unit View Supply Compensation in Unit View During normal operation, as the rack temperature increases above the fan temperature setpoint, the fan speed will increase until it reaches 100% speed.
Operation Return + Supply Compensation: This selection provides the ability to enable both supply and return compensation settings as described above.
Operation 3.9.3 Static Pressure Control Static pressure control normally refers to the control of a variable air flow device that will maintain a differential static pressure between two points. The two points of measurement are typically a point(s) below the raised floor in comparison to a point(s) above the raised floor, also known as ESP (External Static Pressure).
Operation Contact your local Emerson representative for more information or to order the static pressure kit. The Liebert iCOM control can accept a signal from a static pressure sensor connected to an available analog input and powered from T2 to modulate the fan speed as part of the Optimized Aisle Control.
Operation Figure 59 S190 Limit SP Lower Range SP Upper Range Static Pressure Range SP Deadband Fastest fanspeed increase rate Slowest fanspeed increase rate SP Fanspeed P-Band SP Setpoint Figure 60 S190 Control SP Lower Range SP Upper Range Static Pressure Range SP Deadband SP Setpoint 65 Fastest fanspeed increase rate SP Fanspeed P-Band Slowest fanspeed increase rate Fastest fanspeed increase rate SP Fanspeed P -Band Liebert® iCOM®
Operation Figure 61 Setpoints screen, page 9 of 9 S190 Static Pressure Fan Control—Enables or Disables the use of static pressure control for fan modulation. This parameter is selectable between Disabled and Enabled. The factory default is Disabled. S191 SP Setpoint—Sets the static pressure setpoint to be used by the control to modulate fan control. This parameter is selectable from 0.008 to 1.003 inWC (2.0 to 250 Pa). The factory default is 0.020 inWC (5 Pa).
Operation S199 Operation @ Sensor Failure—This parameter determines what action to take if the static pressure sensor fails (non-teamwork). There are two options to use when handling a static pressure sensor failure, they are SP OFF = static pressure control Off, where the control will use S146 to control the fan when the sensor is lost or Freeze Speed = keep the fanspeed unchanged based on the last reading to iCOM.
Operation Table 9 Possible event settings—some events not available in all units Event MAIN FAN OVERLOAD LOSS OF AIRFLOW CLOGGED FILTERS HIGH ROOM TEMP LOW ROOM TEMP HIGH ROOM HUM LOW ROOM HUM HIGH TEMP SENSOR A LOW TEMP SENSOR A HIGH HUM SENSOR A LOW HUM SENSOR A COMP 1 OVERLOAD COMP 2 OVERLOAD COMP 1 HIGH PRESSURE COMP 2 HIGH PRESSURE COMP 1 LOW PRESSURE COMP 2 LOW PRESSURE COMP 1 PUMPDOWN FAIL COMP 2 PUMPDOWN FAIL DIG SCROLL1 HIGH TEMP DIG SCROLL2 HIGH TEMP EL HEAT HIGH TEMP WORKING HRS EXCEEDED SMOKE
Operation Table 9 Possible event settings—some events not available in all units (continued) Event Condensate 1 Failure Condensate 2 Failure EC Fan Fault HIGH SUP TEMP LOW SUP TEMP REDUCED ECO AIRFLOW ECO HI TEMP OVERRIDE TEMP CTRL SENSOR FAIL HIGH DEW POINT LOW DEW POINT HI DEW POINT SENSOR A LOW DEW POINT SENSOR A HIGH REMOTE SENSOR POWER “A” FAILURE POWER “B” FAILURE AIRFLOW SENSOR FAILURE HUM CTRL SENSOR FAIL LOSS OF FLOW STAT PRES SENSOR FAIL LOW STATIC PRESSURE HIGH STATIC PRESSURE STATPRES OUT OF
Operation 3.10.2 User Inputs The user can connect and specify up to four inputs depending on unit configuration. The user inputs are digital inputs that can provide information about an event associated with the unit or space. The customer input configuration settings are in the Service menu under Set Alarms, Screen 2 of 7. The choices for the customer inputs are shown in Table 10 along with their associated reaction. The customer inputs can be programmed as normally open or normally closed to alarm.
Operation 3.10.3 Analog Inputs—Liebert CW™ and Liebert DS™ Air-Cooled Units The Liebert iCOM allows an external sensor or analog device to be connected, scaled and viewed on the Liebert iCOM large display for Liebert CW and Liebert DS air-cooled units only. These external devices require optional analog input connections that can be installed on new units at the factory or added to existing units in the field.
Operation 3.10.4 Liebert iCOM-DO™ The Liebert iCOM-DO is an optional discrete output relay card that can be connected to a Liebert iCOM for providing dry alarm contact outputs for monitoring systems. The Liebert iCOM-DO is a direct replacement of the Liebert ENV-DO™ card that was supported on previous Liebert control systems. The Liebert iCOM-DO allows simultaneous use of the Liebert IntelliSlot cards as the Liebert iCOM-DO communicates over the CANbus network instead of the IGMnet interface.
Operation 3.10.5 Possible Event Notifications Table 14 lists examples of alarms and warnings that can be configured for a cooling unit. When any of these occur, they will appear on the Liebert iCOM Status menu and will be recorded in the Liebert iCOM Event log.
Operation 3.11 Wellness—Next Maintenance Calculation The next maintenance calculation, as well as the diagnostics feature, will help keep the cooling unit running at peak performance to ensure minimum component stress and maximum reliability. The diagnostics will help the service engineer evaluate the unit’s operation since the last maintenance. 3.11.
Operation Liebert iCOM displays a graphic for needed maintenance. It begins with the standard maintenance interval—12 months, six months or three months—and adjusts that based on its calculation of components’ wellness. To calculate wellness, Liebert iCOM keeps a running total of component working hours and the number of times it has been started. Liebert iCOM relates that data to the optimum/maximum starts per hour. Accordingly, Liebert iCOM will increase or decrease the time before the next service call.
Teamwork 4.0 TEAMWORK Unit-2-Unit (U2U) communications via a private network will allow the following functions to be placed into operation when the requirement exists. The user must install the correct hardware (see 5.0 - Installing a Liebert iCOM Unit-to-Unit Network) and properly program the units for the selected functionality. The Liebert iCOM network can perform the following functions: The Teamwork Mode functions allow for multiple stages of cooling/heating and humidification/dehumidification.
Teamwork 4.2.2 No Teamwork All cooling units work independently, responding to their own sensors. Standby function and unit rotation are possible, but cascading is not (see Standby and Cascade on page 90). Autoset will not adjust the proportional band in this mode. 4.2.3 Teamwork Mode 1 Teamwork Mode 1 works best in small rooms with balanced heat loads. The return temperature and humidity sensor readings of all units in operation (fan on) are averaged by the master unit, Unit #1, and used for control.
Teamwork Figure 64 Teamwork Mode 1, serial staging System Deviation : 60% System proportional band 100 % 60% heating 0% - temp. +temp. -100 % 1/2 Proportional Band 0% Setpoint Unit 2 Deviation : 20% Unit 1 Deviation : 100% C1 +100% 1/2 Proportional Band C2 C1 cooling C2 cooling +temp. 0% Setpoint 4.2.4 1/2 Proportional Band +100% 0% Setpoint 1/2 Proportional Band +temp.
Teamwork Figure 65 Teamwork Mode 3—Fixed speed vs. variable speed C R A C C R A C C R A C C R A C C R A C C R A C C R A C C R A C Fixed Speed Three Units On—One Unit in Standby Fans must operate at 100% to meet demand 3 Units x 8.1kWh = 24.3kW per hour Variable Speed Area within dotted lines is being cooled by CRAC units controlled by Liebert iCOM Four Units Operating Together Fans can operate at 75% to meet demand 4 Units x 3.43kWh = 13.
Teamwork Application and Configuration of Rack Sensors The inlet rack temperature sensors should be placed on a rack that is within the area of influence of the connected cooling unit. The following floor plan shows how the sensors should be placed. The sensors and units are color matched to show the location of each unit's sensors. This particular floor plan shows how the sensors can be interlaced with one another to provide redundancy of the different unit's sensors.
Teamwork Figure 67 Sensor positioning Supply (Discharge) Temperature Sensor Inlet Rack Temperature Sensors (sensors in each row) 4.2.6 Hardware Setup The Liebert Optimized Aisle Control requires: • A temperature/humidity sensor in the cold aisle and connected to the Liebert iCOM via CAN bus.
Teamwork 4.3 Liebert Optimized Aisle Rack Sensor Installation Each 2T sensor has two wires leaving the housing with temperature sensors on the end of each wire; see Figure 68. Figure 68 2T rack sensor Sensors shown may differ depending on equipment installed To install the Optimized Aisle Control 2T Sensor Array: 1. 2. 3. 4. 5. Set DIP switch settings for 2T sensors. Terminate the final sensor on the CANbus link. Install 2T sensors on racks to be monitored. Install CANbus cable between 2T sensors.
Teamwork Figure 70 DIP switches in 2T sensors Switch Up = ON Switch Down = OFF Table 15 DIP switch settings DIP switch Position 2T Sensor # 1 2 3 4 5 6 7 8 1 Off Off On Off On Off Off Off 2 On Off On Off On Off Off Off 3 Off On On Off On Off Off Off 4 On On On Off On Off Off Off 5 Off Off Off On On Off Off Off 6 On Off Off On On Off Off Off 7 Off On Off On On Off Off Off 8 On On Off On On Off Off Off 9 Off Off On On O
Teamwork 4.3.3 Terminate the Final Sensor on the CANbus Link 2T Sensors do not need to be addressed in numerical order. For example, if four sensors are purchased, they can be connected as shown in Figure 72. Figure 72 2T sensor arrangement and termination Liebert iCOM Sensor #2 Sensor #3 Sensor #1 Terminated Sensor #4 The key is to have the last sensor in the chain terminated.
Teamwork 4.3.4 Install 2T Sensors on Racks to be Monitored Both temperature sensors attached to a 2T sensor housing are to be installed on the same rack. The sensor can be attached to the inside or outside of the rack's front door. • One temperature sensor is to be attached near the top of the rack's front door by using a cable tie to secure the wire to the perforation (approx. 12 inches [305mm] from the top). Do not wrap a cable tie around the actual sensor on the end of the wire.
Teamwork 4.3.5 Install CANbus Cable Between 2T Sensors No special considerations are required for cable up to 150 ft. (45m) long. A CANbus isolator (Liebert Part # 301275G1S) is required for cables between 150 ft. and 300 ft. (45m and 91m). Contact the factory if using CANbus cables longer than 300ft (91m). The CANbus cable network requires a ground wire.
Teamwork Figure 74 CAN cable pin location and connection code Pin 1 Pin 1 Wire Color Code Pair Number Pair Color 1 Black Brown 2 Blue Violet 3 Yellow Green 1 Black 1 2 Brown 2 3 Blue 3 4 Violet 4 5 Yellow 5 6 Green 6 Pair 1 Pair 2 Pair 3 Figure 75 Connect CANbus cable 4.3.
Teamwork 4.3.7 Install Grounding Ring Connector in Electrical Panel ! WARNING Risk of electrical shock. Can cause injury and death. Disconnect local and remote power supplies before working within. Before proceeding with installation, read all instructions, verify that all the parts are included and check the name® microprocessor does not isolate power from the unit, even in the Unit Off mode. Some internal components require and receive power even during the Unit Off mode of the Liebert iCOM control.
Teamwork 4.3.8 Software Setup Cooling units to be set up for Teamwork Mode 3 (Liebert Optimized Aisle Control) must be connected in a Liebert iCOM U2U network and must have: • Digital scroll compressors, chilled water valves or four-step compressors. (Two-step semi-hermetic compressors and standard scroll units cannot be configured for Teamwork 3.) • Variable speed fans • Supply air sensors connected for temperature control. 1.
Teamwork Standby and Cascade Cascade is possible in Teamwork Mode 1 and 3 only. Line S508 Cascade Units has the options of Yes, Cool / Heat, Cooling, Fan Yes—Based on a call for heating, cooling, humidification or dehumidification. TW1 Cool / Heat—Based on a call for heating or cooling. Teamwork Mode 1 Cooling—Based on a call for cooling. Teamwork Mode 1 Fan—The only selection available for Teamwork Mode 3; not available in Teamwork Mode 1.
Installing a Liebert iCOM Unit-to-Unit Network 5.0 INSTALLING A LIEBERT ICOM UNIT-TO-UNIT NETWORK Connecting multiple Liebert iCOM-controlled cooling units in an Ethernet Unit-to-Unit (U2U) network enables the units to work together to achieve efficient cooling and humidity control of the conditioned space.
Installing a Liebert iCOM Unit-to-Unit Network 5.2 U2U 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.
Installing a Liebert iCOM Unit-to-Unit Network 5.3 Wiring for Unit-to-Unit Communications—U2U Cooling units come from the factory-wired for stand-alone operation. Liebert iCOM U2U Ethernet Network The Liebert iCOM U2U network must be isolated from other network traffic. The network switch(es) that connect Liebert iCOMs need to be dedicated to supporting only Liebert iCOM communication. The U2U network cannot be connected to the building or IT network.
Installing a Liebert iCOM Unit-to-Unit Network 5.3.1 Wiring a Liebert iCOM U2U Network Small Displays Two cooling units, each with a small display: To network two cooling units, each with a small display, connect a crossover CAT5 cable between the P64 connectors on each cooling unit’s Liebert iCOM input/output board. A network switch is not needed (see Figure 78).
Installing a Liebert iCOM Unit-to-Unit Network Figure 79 U2U network setup diagram Display Service/Network Liebert iCom Display Menu IP Address: 192.168.254.001 U2U Address: 33 Group #: 1 --------------------------------------- Display Service/Network Liebert Cooling Unit Control Board Menu IP Address: 192.168.001.002 U2U Address: 1 Group #: 1 Display Service/Network Liebert Cooling Unit Control Board Menu IP Address : 192.168.254.
Installing a Liebert iCOM Unit-to-Unit Network Wall-Mount Large Display Only large displays can be used for remotely monitoring and controlling cooling units connected on the same network. Each wall-mount large display requires 120VAC or 230VAC input power; Emerson® provides an AC adapter wall plug. A straight-through Ethernet cable must be connected between the network switch and the P64 port on the back of the display.
Installing a Liebert iCOM Unit-to-Unit Network Figure 81 Wiring a small display for U2U network operation CAN Cable P64A Connection (if provided) Near I/O Board Not Used Standard Small Graphics Display (Rear View) U2U Networking Switch (Field-Supplied) Liebert iCOM I/O Board Straight-Through To / From Other Ethernet Cable Networked Units (If the coupler is not provided in the unit, connect the other end plug straight into Port P64 of the Liebert iCOM I/O board) 97 Liebert® iCOM®
Installing a Liebert iCOM Unit-to-Unit Network Figure 82 Wiring a large display for U2U network operation CAN Cable Ethernet Cable Crossover Coupler (if provided) See Note 4 P64A Connection (if provided) Near I/O Board Optional Large Graphics Display (Rear View) Not Used Customer Connection Point (if provided) U2U Networking Switch (Field-Supplied) Liebert iCOM I/O Board To / From Other Networked Units Straight-Through Ethernet Cables (If coupler is not provided, connect one end plug to P64 of large
Installing a Liebert iCOM Unit-to-Unit Network Liebert vNSA™ The Liebert vNSA is designed to connect multiple Liebert iCOMs. The Liebert vNSA contains either one or two powered industrial rail switches. An optional remote large display can be attached to the front door as well. All models have a power supply that requires connection to a single phase 120VAC or 230VAC power source. The enclosure features a key lock for security.
External Communication—Building Management Systems, Liebert SiteScan® 6.0 EXTERNAL COMMUNICATION—BUILDING MANAGEMENT SYSTEMS, LIEBERT SITESCAN® Liebert iCOM is capable of communicating with external monitoring systems, such as Building Management Systems (BMS), Network Monitoring Systems (NMS), Liebert's SiteScan® Web and others. Each Liebert iCOM-controlled cooling unit is equipped with Liebert IntelliSlot® plug-in slots for use with optional communication cards.
External Communication—Building Management Systems, Liebert SiteScan® 6.1 Terminals 77 and 78 Emerson® has begun removing the IGMnet Terminals 77 and 78 from the Liebert DS,™ Liebert CW™ and Liebert Challenger 3000™ product lines. These terminals have been offered in newer products to maintain connectivity with Liebert SiteLink units.
External Communication—Building Management Systems, Liebert SiteScan® Figure 84 Connection to Liebert SiteLink™ via 77/78 Previous Connection to SiteLink via 77/78 Liebert iCOM Control Board Set the Liebert iCOM monitoring protocol to iGMNet for 77/78 functionality 77/78 Terminals New Connection to Liebert SiteLink via IS-485EXI Set the Liebert iCOM monitoring protocol to iGMNet for 77/78 functionality Liebert iCOM Control Board Liebert IntelliSlot Power Supply Liebert® iCOM® IS-485EXI Liebert Int
User Menu Parameters 7.0 USER MENU PARAMETERS User menus report general cooling unit operations and status. The user menu password is 1490. The User menu parameter tables in this manual may differ from the display on your cooling unit. The Liebert iCOM functions with several Liebert Precision Cooling units, each with its own set of control commands. In addition, the Liebert iCOM firmware is being updated constantly.
User Menu Parameters U102 Temperature Setpoint—Selects a temperature that the cooling unit will maintain by applying cooling and or reheats. There are two values in this field. The Temp Set value is the temperature that has been set by the user to control the temperature. The Temp Act value is a read only value that indicates if another routine, like supply compensation has internally modified the Temp controlling value. If compensation has not been activated, then ACT and SET will always match.
User Menu Parameters Figure 87 Setpoints screen, page 2 U113 2nd Temperature Setpoint—Allows for a dry contact through the customer inputs connections. When a customer input connection is set to 2nd Temperature Setpoint and the input is wired to that input is triggered, then the value set in this parameter sets the active temperature setpoint. This parameter is adjustable from 41°F to 81°F. The factory default setting is 41°F.
User Menu Parameters 7.2 User-Graphic Menu Screens Graphic screens allow the user to view temperature and humidity graphs. Nine flexible time scales with ranges up to 16 days are available. Figure 88 Graphs, page 1 There are two line trend graphs in Liebert iCOM. The upper graph displays temperature data and the lower graph displays humidity data. Each graph can be customized by changing the span of time and the range of the sensor readings.
User Menu Parameters Event Log Event Log—The event log displays all events and actions generated by the unit. When multiple units are networked the event log shows results for the whole system. Each event shows the unit that generated the alarm, time and date stamp, a description and the event type. The event log contains the last 400 events generated by the unit. Events include such occurrences as unit On/Off commands, alarms, warnings and messages. The event log has two views: system view and unit view.
User Menu Parameters 7.3 User-Set Alarms Menu Screens Set Alarms allow the user to view and modify basic temperature and humidity alarms and thresholds Figure 90 Set alarms screen, page 1 U202 Return Sensor Alarms—Enables or disables the return sensor alarms. When enabled, the return temperature and humidity values will be compared to a high and low setting. U203 High Return Temperature—Allows a user to adjust the point at which the actual return temperature activates a High Temperature Alarm.
User Menu Parameters Figure 91 Set alarms screen, page 2 U213 Supply Sensor Alarms—Enables or disables the supply sensor alarms. When enabled, the supply temperature and humidity values will be compared to a high and low setting. U214 High Supply Temperature—Sets the temperature at which the High Supply Temperature Alarm is activated. This parameter is adjustable from 34°F to 210°F. The factory default setting is 75°F.
User Menu Parameters Figure 92 Set alarms screen, page 3 U224-U233 High/Low Remote 01 - 10— Sets the High and Low remote temperature sensor alarm points individually for each sensor when the parameter separate thresholds is set to disabled. The range for both parameters is 34°F to 210°F. The default setting for low alarm is 55°F. The default setting for high alarm is 90°F. Figure 93 Set alarms screen, page 4 U235 Static Pressure Messages—Enables or disables the static pressure alarms.
User Menu Parameters U239 SP Messages on Fan Adjust—Enables or disables the static pressure alarms when the fan has been adjusted due to special events. These events include an adjustment for heating, humidification, dehumidification, motor overload / EC fan fault or loss of airflow. U240 SP Transducer High Range—Sets the pressure range at which the High Static Pressure Out of Range Alarm is activated. This parameter range is adjustable from 0.000 - 1.405 inWC. The factory default setting is 1.284 inWC.
User Menu Parameters U304 Optional Sensor B2H—Shows the Sensor B humidity value if optional reference sensor is connected to the Liebert iCOM controller area network (CAN) bus. A reference sensor can be connected to any type of Liebert iCOM unit. When an optional temperature and humidity or the optional 2T sensor is connected and set as Sensor B, then its value will be displayed on this line. Liebert iCOM will auto detect what type of sensor is connected.
User Menu Parameters Figure 95 Sensor data screen, page 2 (return only) U313 Daily High Temperature—The highest recorded temperature from the temperature controlling sensor between the hours of 12:00 a.m. to 11:59 p.m. U314 Daily Low Temperature—The lowest recorded temperature from the temperature controlling sensor between the hours of 12:00 a.m. to 11:59 p.m. U315 Daily High Humidity—The highest recorded humidity from the temperature controlling sensor between the hours of 12:00 a.m. to 11:59 p.m.
User Menu Parameters Figure 96 Sensor data screen, page 3 U325 Remote Sensor 1/2—Displays the actual remote sensor reading for each remote sensor. The actual value reported here is dependent on how the sensor is setup. If the sensor is set to average, then an average of the 2 temperature readings per sensor will be shown. If the sensor is set to maximum, then the maximum value will be shown.
User Menu Parameters Figure 97 Sensor data screen, page 4 These parameters show the analog input configured device and the value from the device that is connected to the Liebert iCOM control. Refer to the Figures 8.11 through 162 for a list of analog input devices. The analog input device is setup in the Service menu and could consist of the following devices: Air Pressure, Pressure, Temperature or Percent. Active Alarms Active Alarms—Permits viewing all current, active alarms.
User Menu Parameters 7.5 User-Display Setup Menu Screen Display Setup is where items such as date, time, screen type and temperature indication may be set according to user preference. Figure 98 Display setup screen U401 Language—Sets the language on the display. Changing this parameter changes all menu parameters to the selected language.Currently, the supported languages for this version of software is English, Chinese, Japanese and Spanish. U402 Date—Sets the internal date of the unit.
User Menu Parameters U410 Display Colors—Selects the background color. Inverted sets the display to show white font with blue background; Normal sets a white background with blue font. U411 Date Format—Changes the month, day, and year arrangement shown on the front display and event time stamps. Default: MM/DD/YYYY Other selections: DD.MM.YYYY and YYYY-MM-DD 7.
User Menu Parameters 7.7 User-Sleep Mode Menu Screens The Sleep Mode menu contains parameters to set back or allow unit to turn Off during non-peak hours. Sleep Mode may be interrupted if the temperature rises above threshold set in the Set Alarms menu. Figure 100Sleep mode screen U609 Timer Reset—Defines when the unit changes back to Sleep Mode after having crossed the high or low temp threshold (Deadband setting on line U611).
User Menu Parameters 7.8 User-Condenser Timer Menu Screens The Condenser Timer menu applies to Liebert units coupled to a Liebert MC™ outdoor condenser connected through CANbus communication. Figure 101 Condenser timer screen—page 1 U802 Low Noise Timer Enabled—Sets the low noise operations of the condenser fan. When the parameter is set to “YES” the low noise operation is selected. When set to “NO,” the low noise will be disabled even if a schedule is set below.
User Menu Parameters Figure 102 Condenser timer screen—page 2 U813 Select Condenser 2—This menu selection toggles between condenser 1 and 2. When “Select Condenser 2” is shown the data below is for condenser 1. When “Select Condenser 1” is shown, the data below is for condenser 2. U814 Fan Reversal Every x Days—Selection defines the numbers of days between fan reversals. This parameter is adjustable from 1-100 days. The default set value is 0 days = OFF.
User Menu Parameters Configuring Low Noise Operation First, determine the days and time of day low noise is required. This will be set U806 through U808 respectively. Second, determine the maximum fan speed setting during low noise operation. In this example, the user does not want fan speed to exceed 35% max speed from 10 pm to 8 am weekdays. 1. 2. 3. 4. 5. Set U805 Mon-Fri columns to yes.
Service Menu Parameters 8.0 SERVICE MENU PARAMETERS Service menus allow customized settings for site operations. The password for service menu parameters is 5010. The Liebert iCOM firmware is being updated constantly. As a result, the Service menu parameter tables shown in this manual may be slightly different than what is shown on your cooling unit's display. Please check www.liebert.com for the latest Liebert iCOM User manual updates. Figure 103 8.
Service Menu Parameters S102 Temperature Control Sensor—Selects which sensor will be controlling the cooling capacity. Cooling capacity is either the Chilled Water Valve, Compressor, FreeCooling Valve or Air Economizer. Unloading type compressors can be set to any sensor type, however fixed style compressors can only be set to Return or Remote control type l. This parameter can only be changed in the service menu. The range is Supply, Return or Remote Sensor. The factory default setting is Return.
Service Menu Parameters Figure 105 Setpoints screen, page 2 of 9 S113 Enable Temp Compensation—Temperature compensation allows for a second or even a third sensor to be used that will influence the units cooling or heating. Return compensation can be used when the supply or remote sensors are being used for control. Then the return sensor is then monitored to maintain a minimum return temperature. Supply compensation can be used only when Optimized Aisle is enabled.
Service Menu Parameters Figure 106 Setpoints screen, page 3 of 9 NOTE When the unit is in relative humidity control, only the right side of the menu is displayed and dew point will display the left side of the menu. S124 Humidity Control Sensor—Defines which humidity value the humidity setpoint is compared with. The return sensor is equipped with a Temp / Hum sensor and can calculate the dew point based on iCOM's internal lookup table.
Service Menu Parameters S131 Dehum Setpoint Adjust/Filter—Sets the amount that the Dehum Temp Setpoint is adjusted when the reheats activate. Example: If the unit is equipped with a reheat device, this parameter will increase the dehumidification temperature as the call for reheats are increased until the reheat call is at 100%. When the reheats are at 100%, the full Dehum Setpoint Adjustment will be applied.
Service Menu Parameters S138 DT2 (Room/FC Fluid) Value—Sets the delta between the actual temperature and fluid temperature that must be met before free-cooling will occur. Example: Actual Temperature = 75°F Free-cooling Temperature = 70°F DT2 Value = 4 Since the difference between the free-cooling fluid and the actual temperature is 5°F and the DT2 value is set to 4°F, then free-cooling would be utilized.
Service Menu Parameters S149 Fan Temp Prop/Integral—Adjusts the fan speeds rate of change based on the actual sensor values deviation from setpoint. The smaller this number, the faster the fans will increase speed. Too small of a number may cause the fans to increase decrease and overshoot setpoint. Temperature Integration Time—Adjusts the fans of the unit based on time away from setpoint so that accurate temperature control can be maintained.
Service Menu Parameters S158 Fanspeed Filter at 0-100%—This parameter should only be adjusted by a factory service trained technician. Fan Cap Filter at 0% / 100% controls the rate of change during fan speed changes to avoid overshoots. The filter value depends on the current control deviation from the setpoint. On the setpoint (at 0%), it’s typically set lower (slow), and at the end of the P-band (at 100%) it’s typically set higher (faster). The value is given in % control output change per second.
Service Menu Parameters Figure 110 Setpoints screen, page 7 of 9 S168 Fan Back Draft Control—Enables or disables the Back Draft fan control. This feature allows EC Fans (only) to operate at very low speeds to prevent airflow from cycling through the unit due to a higher under-floor static pressure than the above floor static pressure. VFD’s cannot be used with this feature due to motor and or bearing degradation that may occur at the low fan speeds required to support this feature.
Service Menu Parameters S175 Display Off and BDR—When the back draft damper is enabled, different modes can activate this feature. Remote Off, Display Off, BMS Off and Local Off can all be set to activate the back draft damper operation. This is done pressing the I/O key at the unit to put the unit is a display OFF condition. S176 BMS Off and BDR—When the back draft damper is enabled, different modes can activate this feature.
Service Menu Parameters S186 Cycle Time—Set at the factory and should be changed only by an authorized Emerson representative. S187 SCR Factor—Set at the factory and should be changed only by an authorized Emerson representative. S188 Actual SCR Request—Displays the actual SCR reheat being requested. Figure 112 Setpoints screen, page 9 of 9 S190 Static Pressure Fan Control—Enables or Disables the use of static pressure control for fan modulation. This parameter is selectable between Disabled and Enabled.
Service Menu Parameters S198 SP Sensors in Avg for TW—Sets the number of sensors used when averaging sensors in the team work. This parameter is selectable from 1-32. The factory default is 2. S199 - Operation @ Sensor Failure—This parameter determines what action to take if the static pressure sensor fails (non-teamwork).
Service Menu Parameters 8.2 Service—Standby Settings / Lead Lag Menu Screen Standby Settings / Lead Lag allows the user program lead-lag setup when units are connected in a Liebert iCOM U2U network. Figure 113 Standby settings / lead-lag screen S502 Number of Standby Units—Selects the number of units that will be in Standby mode. When a unit is in standby mode, the fan will be Off and no cooling will be provided.
Service Menu Parameters S511 Cascaded Units Min Run—Sets a minimum run time after a commanded unit is turned On. The timer must expire before the unit can go back into standby. This parameter range is 2-360 minutes. The factory default is 30 minutes. S512 Cascaded Units Control Delay Teamwork Mode 1: Mode C: once the unit was started, the fanspeed control will start immediately, but the cooling / humidity control will be delayed by the value set in S512 Cascaded Units Control Delay.
Service Menu Parameters 8.3 Service-Maintenance / Wellness Menu Screens Maintenance / Wellness Settings allow the user to set maintenance interval, maintenance message, read the number of starts / stops, and run hours since the last maintenance. See below and 3.11.1 - Calculating Next Maintenance and Diagnostics for additional details on these menu screens.
Service Menu Parameters Figure 115 Wellness—Motor settings screen, page 2 of 9 Figure 116 Wellness—Compressor 1 settings screen, page 3 of 9 137 Liebert® iCOM®
Service Menu Parameters Figure 117 Wellness—Compressor 2 settings screen, page 4 of 9 Figure 118 Wellness—Electric heater 1 settings screen, page 5 of 9 Liebert® iCOM® 138
Service Menu Parameters Figure 119 Wellness—Electric heater 2 settings screen, page 6 of 9 Figure 120 Wellness—Electric heater 3 settings screen, page 7 of 9 139 Liebert® iCOM®
Service Menu Parameters Figure 121 Wellness—Humidifier settings screen, page 8 of 9 Figure 122 Wellness—Economizer settings screen, page 9 of 9 Liebert® iCOM® 140
Service Menu Parameters 8.4 Service-Diagnostics / Service Mode Screens Service-Diagnostics / Service Mode provides troubleshooting tools including alarm counters, manual mode, readable analog and digital inputs/outputs and other diagnostic features. Figure 123 Diagnostics/service mode screen, page 1 of 8 S302 HP 1 Alarm Code—Compressor 1 high pressure alarm code: 0 = no alarm; 2 = high-pressure alarm active.
Service Menu Parameters Figure 124 Diagnostics/service mode screen, page 2 of 8 S313 Manual Mode—Places the Liebert iCOM in manual mode. This is the initial setting necessary to activate any of the following items. Manual Mode is used a diagnostic tool to test components and operation of the unit. This is useful when testing components such as fans, LLSV, compressors and actuators to validate operation and performance. To use manual mode, enter the level 2 password, 5010, and select YES on line S313.
Service Menu Parameters Figure 125 Diagnostics/service mode screen, page 3 of 8 S324 Electric Heat 1 (or HG/HW)—Activates Stage 1 of the unit’s reheat system. S325 Electric Heat 2 (or HG/HW)—Activates Stage 2 of the unit’s reheat system. S326 Electric Heat 3 (or HG/HW)—Activates Stage 3 of the unit’s reheat system. S327 SCR Heat—Specifies the pulse width the heating system should run at on units using silicon controlled rectifier type reheat.
Service Menu Parameters Figure 126 Diagnostics/service mode screen, page 4 of 8 S335 Alarm Relay—Activates the Liebert iCOM’s common alarm relay output. S336 K11 Relay—Activates the Liebert iCOM’s free-cooling relay output. S337 3P 1/2 Actuator Open—Energizes the open circuit of the 3P type chilled or free-cooling control valve. The 3P valve is easily identified because it will be controlled from P22 of the main board. Both values must be programmed On for the valve to modulate open.
Service Menu Parameters Figure 127 Diagnostics/service mode screen, page 5 of 8 Status Remote Shutdown—Shows the status of the unit’s remote shut down input. S346 Status Airflow Loss—Shows the status of the unit’s air proof switch. S347 Status Motor Overload / EC Fan Fault—Shows the status of the unit’s main fan overload or EC fan fault input. S348 Status Filter—Shows the status of the unit’s filter clog switch input.
Service Menu Parameters Figure 128 Diagnostics/service mode screen, page 6 of 8 S356 Status HP1—Shows the status of the unit’s compressor 1 high pressure switch input. S357 Status LP1—Shows the status of the unit’s compressor 1 low pressure switch input. S358 Status C1 OL—Shows the status of the unit’s compressor 1 overload input. S359 Status HP2—Shows the status of the unit’s Compressor 2 high pressure switch input. S360 Status LP2—Shows the status of the unit’s Compressor 2 low pressure switch input.
Service Menu Parameters S370 Status DT3 (Room/Setpoint)—Indicates if the delta T between room return air temperature and unit air temperature setpoint has been met. S371 Status DT4—Indicates the status of the Economizers ability to operate when looking at outdoor air, humidity and wet bulb. (Wet bulb applicable only on DX units). S372 Status Min CW—Indicates if the free-cooling or chilled water temperature is below the minimum chilled water setpoint.
Service Menu Parameters 8.5 Service-Set Alarms Menu Screens Set Alarms allows the user to view and modify critical alarm thresholds, time delays, enable/disable alarms, modify event types and program custom alarm inputs. Figure 131 Set alarms screen, page 1 of 10 S202 Return Sensor Alarms—Enables and disables the return temperature and humidity sensor alarms. Factory default is set to enable. S203 High Return Temperature—Sets the threshold temperature when a return high temperature alarm will occur.
Service Menu Parameters Figure 132 Set alarms screen, page 2 of 10 S213 SUP Sensor Alarms/Init Delay—The parameter to the left enables or disables the supply sensor alarms. If the unit is not equipped with a supply temperature sensor, then this parameter will show Disabled. The parameter to the right sets the alarm activation delay for when a supply alarm will become active after either the high or low threshold has been exceeded.
Service Menu Parameters Figure 133 Set alarms screen, page 3 of 10 S224 Customer Input 1, 2, 3 & 4—Select the device and operation of the customer inputs. Each event reflects a different alarm and possible action to the unit. Refer to Table 9 for a description of selectable options. S225-231 Customer Input 1, 2, 3 & 4 active when—Select whether the input is a normally closed or normally closed input. S232 Warning Activates Alarm Relay—Sets the alarm relay (K3) to activate when a warning occurs.
Service Menu Parameters Figure 134 Set alarms screen, page 4 of 10 Figure 135 Set alarms screen, page 5 of 10 151 Liebert® iCOM®
Service Menu Parameters Figure 136 Set alarms screen, page 6 of 10 Figure 137 Set alarms screen, page 7 of 10 Liebert® iCOM® 152
Service Menu Parameters Figure 138 Set alarms screen, page 8 of 10 Figure 139 Set alarms screen, page 9 of 10 153 Liebert® iCOM®
Service Menu Parameters Figure 140 8.6 Set alarms screen, page 10 of 10 Service-iCOM-DO Setup Menu Screens The iCOM-DO Setup menu is used to configure the Liebert iCOM-DO. Figure 141 iCOM-DO overview and override screen, page 1 of 3 S721 Liebert iCOM-DO™—Shows the connection status of a Liebert iCOM-DO card. It displays “connected” when a Liebert iCOM-DO card has been set up and connected to the Liebert iCOM via the CAN bus.
Service Menu Parameters Figure 142 iCOM-DO events setup screen, page 2 of 3 S733-740, S744-S751—The lines are divided into four columns. • Event Description—Read-only parameter that describes the event type that may activate an output on the Liebert iCOM-DO™. Each event description may reflect a status or alarm, depending on the line. • ID—Displays the number of the Liebert iCOM-DO. Currently only one Liebert iCOM-DO card is supported. The ID must match the S721 to function.
Service Menu Parameters 8.7 Service-Sensor Calibration Menu Screens Sensor Calibration allows the user to view readings of connected sensors and calibrate values as needed. Figure 144 Sensor calibration setup screen, page 1 of 7 S602 Return Temperature—Adjusts the return temperature reading from the actual sensor to compensate for any error of the sensor or to match other sensors in the room. S603 Calibrated Return Temperature—Shows the adjusted temperature value of the return sensor.
Service Menu Parameters Figure 145 Sensor calibration/setup screen, page 2 of 7 Optional Sensor A and B—Adjusts the reading from the actual sensor to compensate for any error of the sensor or to match other sensors in the room. Calibrated Optional Sensor A and B—Shows the adjusted value of the sensor. This value is the actual sensor reading (+ or -) the offset. Optional Sensor C Type—Currently supports only the “TH” Temperature/Humidity sensor type.
Service Menu Parameters Figure 146 Sensor calibration/setup screen, page 3 of 7 S624 Freecool Sensor PTC or NTC—Currently supports only the NTC selection. S625 Freecool Sensor—Adjusts the free-cooling temperature reading from the actual sensor to compensate for any sensor error or to match other sensors in the room. S626 Calibrated Freecool Sensor—Shows the adjusted temperature value of the free-cooling sensor. This value is the actual sensor reading (+ or -) the offset “Freecool Sensor.
Service Menu Parameters Figure 147 Sensor calibration/setup screen, page 4 of 7 Figure 148 Sensor calibration/setup screen, page 5 of 7 159 Liebert® iCOM®
Service Menu Parameters Figure 149 Sensor calibration/setup screen, page 6 of 7 S657 DP Transducer is Connected to—Sets the analog output that will be used for the differential pressure transducer. This parameter is selectable from None, Ana In 1, Ana In 2, Ana In 3 and Ana In 4. The factory default is none. S658 DP Transducer is Setup in—Sets the unit of measure that will be used for the differential pressure transducer. This parameter is selectable in inWC or PA. The factory default is PA.
Service Menu Parameters Figure 150 Sensor calibration/setup screen, page 7 of 7 S670 SP Transducer is Connected to—Sets the analog output that will be used for the static pressure transducer. This parameter is selectable from None, Ana In 1, Ana In 2, Ana In 3 and Ana In 4. The factory default is none. S671 SP Transducer Setup in—Sets the unit of measure that will be used for the static pressure transducer. This parameter is selectable in inWC or PA. The factory default is PA.
Service Menu Parameters 8.8 Service-Economizer Menu Screens Economizer provides advanced air side Economizer monitoring and parameter adjustment Figure 151 Economizer, page 1 of 3 SA02 Enable Economizer—Sets the Liebert Air Economizer™ operation to one of the following modes. These selections only determine if the Liebert Air Economizer is available for use; they do not determine or override damper position. Damper position is always controlled by the sensor set to control temperature (i.e.
Service Menu Parameters SA11 Delay After Fan Start—Sets the delay from the time the unit has been started until the ECO EMERGENCY OVERRIDE can be triggered. This allows airflow to pass over the sensors to get an accurate reading before any emergency modes are activated. Figure 152 Economizer, page 2 of 3 SA13 Local Outdoor Air Temperature—Actual outdoor temperature from the sensor connected to the unit. SA14 Local Outdoor Air Humidity—Actual outdoor humidity from the sensor connected to the unit.
Service Menu Parameters Figure 153 Economizer, page 3 of 3 SA24 - Return Damper Open—Sets the open voltage. This parameter may be set from 0V to 10.0V. The factory default is 2.0V. SA25 - Return Damper Closed—Sets the closed voltage. This parameter may be set from 0V to 10.0V. The factory default is 10.0V. SA26 - Return Damper Minimum Limit At—Sets the minimum damper position limit for recirculating return air with the outdoor air. This parameter may be set from 0-100%. The factory default is 15%.
Service Menu Parameters 8.9 Service-System/Network Setup Menu Screens System Network Setup allows setting up a unit-to-unit (U2U) network for multiple cooling units controlled by Liebert iCOM. Figure 154 System/network setup screen—System, page 1 of 2 (large display only) S802 Number of Connected Units—Reflects the number of units connected that to the Liebert iCOM large display. If multiple units are connected in a unit-to-unit network, then the number will be greater than one.
Service Menu Parameters Figure 155 System/network setup screen—System, page 2 of 2 (large display only) S813 IP Address—Contains the network address of the display. This address must be unique on the network. S814 Netmask— Netmask is used to divide IP addresses in subnet and specify the network available to hosts. S815 Gateway—Routes data and act as a proxy server or a fire wall when setting up networks. S816 MAC—Unique hardware identifier of the Ethernet device.
Service Menu Parameters 8.10 Service-System/Network Unit-Level Setup Menu Screens Figure 156 System/network setup screen—Unit, page 1 of 2 S824 Monitoring Address—Sets the address used by the Liebert IntelliSlot® cards. This is set to 3 at the factory and should not be changed. S825 Monitoring Timeout/Handshake—Can be used with a building management system to verify communication has not been lost between the Liebert iCOM control and the BMS.
Service Menu Parameters Figure 157System/network setup screen—Unit, page 2 of 2 S835 Monitoring Protocol—Selects the monitoring protocol. Velocity V4 is the factory default that will provide communication to the Liebert IntelliSlot® housing. IGMNet will activate the legacy Liebert SiteLink™ protocol for communication to the Liebert SiteLink™(-E). Liebert Hironet™ is used only on Liebert HPM™ units. S836 IP Address—Contains the network address of the display. This address must be unique on the network.
Service Menu Parameters 8.11 Service-Options Setup Menu Screens Options Setup contains component configuration, such as enable/disable humidifier, reheat, etc. Figure 158 Options setup, page 1 of 6 S402 Compressor Sequence—Changes the lead compressor when cooling is activated. This parameter can also be set to “AUTO” mode, which will activate the compressor with the lowest run hours first.
Service Menu Parameters S41A Minimum Valve Pulse—Sets the minimum valve pulse % when a movement is requested. This parameter is adjustable from 0 - 10%. The factory default setting is 5%. S41B CW Valve Delay / Power Off Time—Sets the delay time of the CW valve movement when power is lost. If power is lost, the valve will not move for the time entered into this parameter so the unit has time to come back online from a power loss. This parameter is adjustable from 0 - 60 minutes.
Service Menu Parameters Figure 160 Options setup, page 3 of 6 S424 CW Flush—Selects the number of hours between each chill water coil flush cycle. The default is every 24 hours. Reducing this number will increase the number of coil flushes. S425 Freecooling Flush—Selects how many hours between each free-cooling coil flush cycle. The default is every 24 hours. Reducing this number will increase the number of coil flushes. S426 Hot Water Flush—Selects how many hours between each hot water coil flush cycle.
Service Menu Parameters Figure 161 Options setup, page 4 of 6 S435 Measure Type—Determines the measurement units and range for each analog input. Factory Std measurement type means the input is being used by the factory-configured device for unit control and cannot be set to any other measurement type. Not Config measurement type means the input is available for custom sensor use, but has not been configured.
Service Menu Parameters Figure 162 Options setup, page 5 of 6 Only characteristics for analog inputs used for custom sensors are visible in this menu. Start Points (S446, S448, S450 and S452)—Represent the starting point of each analog input’s linear characteristic. The column on the left indicates the desired readout at the lowest allowable sensor voltage, and the column on the right indicates the lowest sensor voltage.
Service Menu Parameters Figure 163 Options setup, page 6 of 6 S457 Q15 Output Function—Sets the output function for Q15. This parameter is selectable for 0 = None, 1 = Dehum On, 2 = Cooling On, 3 = Reheat On, 4 = Comp On, 5 = Comp 1 On, 6 = Comp 2 On, 7 = Humi On, 8 = Fan On, 9 = FreeCool On, 10 = Damper, 11 = High Temp, 12 = Low Temp, 13 = Loss Power and 14 = Power Source The factory default setting is none. NOTE: Unit Code 16 can set the output for this parameter.
Service Menu Parameters 8.12 Service-Service Contact Info Menu Screens Service Contact Info contains the service contact phone number, e-mail address, pager number and Web site to be entered in this screen.
Service Menu Parameters 8.13 Service-Remote Sensors Menu Screens Remote Sensors provides remote sensor setup and readings. Figure 164 Remote sensors Number of sensors used to calculate average; hidden when Maximum is selected Node Setup Sensor Node Sensor Name Individual Sensor Reading SB02 programming determines the temperature displayed. SB02 Individual Sensors Mode—Each sensor node has two temperature sensors connected.
Monitoring Points 9.0 MONITORING POINTS Emerson has created the Liebert Monitoring Points Generator to assist in locating the exact monitoring points needed for a specific unit. Contact your local Emerson representative to have this run for your unit. Once this generation is run, it can be saved in various formats—.pdf, .xls or .csv—to be provided with the submittals, quotations and to the BMS commissioning agent for point mapping.
Monitoring Points Figure 166 Example of points generated Liebert® iCOM® 178
Monitoring Points Notes 179 Liebert® iCOM®
Monitoring Points Liebert® iCOM® 180
Technical Support / Service Web Site www.liebert.com Monitoring liebert.monitoring@emerson.com 800-222-5877 Outside North America: +00800 1155 4499 Single-Phase UPS & Server Cabinets liebert.upstech@emerson.
