Liebert® iCOM® User Manual -Intelligent Communications & Monitoring for Liebert Challenger 3000™, Liebert CW™ and Liebert DS™ with Software Version PA2.01.
TABLE OF CONTENTS 1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 LIEBERT ICOM DISPLAY COMPONENTS AND FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . .2 2.1 Control Interface—Large Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6 Temperature Control—Reheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 3.6.1 3.6.2 3.7 Electric, Hot Gas and Hot Water Reheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 SCR Reheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Humidity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2 Monitoring Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 7.0 USER MENU PARAMETERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 7.1 User-Setpoints Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 7.2 User-Graphic Menu Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURES Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 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 Liebert iCOM components . . . .
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 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 Return Comp
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 Figure 120 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
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 Figure 167 Figure 168 Figure 169 Figure 170 Figure 171 Figure 172 Figure 173 Figure 174 Figure 175 Figure 176 Sensor calibration setup screen, page 1 of 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sensor calibration/setup screen, page 2 of 12 . . . . . . . . . . . . . . . . .
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 Keyboard icons and functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 User menu icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Service menu icons . . . . . . . . . . . . . .
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 2.1 Control Interface—Large Display The Liebert iCOM automatically opens to the Unit View Status Menu when the cooling unit is started. This view will display “Unit 1” in the upper right corner of the screen.
Liebert iCOM Display Components and Functions A Liebert iCOM will show only icons for functions available on the unit it is connected to. For instance, a Liebert iCOM on a unit that does not perform humidification or dehumidification will not display icons for those functions. Cooling systems may also disable functions temporarily for protective reasons. Icons for disabled functions will be displayed with a large X over them. The X will disappear when the function becomes available. 2.1.
Liebert iCOM Display Components and Functions Figure 6 Unit status menu, large display, graphical comma view Return Air Temperature Fluid Return Air Flow Temperature Rate Setpoint Air Flow Return Air Humidity Setpoint Unit Name Return Air Humidity System or Unit # view Supply Air Setpoint) Supply Air Temperature (optional) Percent Hot Water Heating Percent Electric Heating Percent Dehumidifying Static Pressure Evaporator Fan Speed Cooling Capacity Percent Cooling Free-Cooling Percentage Next Maint
Liebert iCOM Display Components and Functions Figure 7 System screen with rack view of sensors Fan Control Sensor Total System Airflow Teamwork Mode System Percent Fan System Percent Cooling Fan Control Type (System, BMS or Local) Calculated Next Maintenance Wireless Sensor Non-Weighted Value Cooling Control Type (System or Local) Wireless Sensor Weighted Value Date and Time System Status Most Recent System Events (Date, Time, Unit, Description) Navigation Guide System Screen will indicate if Te
Liebert iCOM Display Components and Functions 2.3 Unit View with Rack Sensors This screen is shown when rack sensors have been configured for control or reference. The temperatures at the top of the main unit screen 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 2.4.1 Accessing Submenus on Large Displays While the display is at unit status screen, press either the Enter or Down arrow key to display the User menu. To access the Service menu, press the Right arrow key. Pressing the Right arrow key again will display the Advanced menu. Pressing the Enter key again will display the menu items. Use the arrow keys to navigate through the icons. When the desired icon highlighted, press the Enter key to enter that submenu.
Liebert iCOM Display Components and Functions Figure 11 Navigation with a large display—single unit view ESC USER MENUS °C / °F % RH SET ! ACTIVE ALARMS Liebert® iCOM® SET ALARMS EVENT LOG 9 SET 1 2 6 3 1234 h 9 10 12 3 6 MOD BUS E.D.
Liebert iCOM Display Components and Functions Figure 12 Navigation with a large display—Network view ESC ESC USER MENUS °C / °F % RH SET ! ACTIVE ALARMS 2.4.2 SET ALARMS EVENT LOG 9 SET 1 2 6 3 1234 h 9 12 3 6 MOD BUS E.D. Accessing Submenus on Small Displays While the display is at the main menu (User, Service or Advanced), use the Up and Down arrow keys to scroll through the icons a page at a time.
Liebert iCOM Display Components and Functions 2.5 Display Setup The Liebert iCOM can be programmed to display information based on user preferences in the User Menu> Display Setup icon. Here the user can set things such as display Language, units of measure, set screen contrast and hide/show certain display readouts. A display filtering feature located within the Display setup menu allows the user to display information of a single unit in the network on the large display.
Liebert iCOM Display Components and Functions Figure 14 Entering a password 2.5.2 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 16 User menu icons USER MENUS °C / °F % RH SET ! ACTIVE ALARMS Table 2 SET ALARMS EVENT LOG 9 SET 1 2 6 3 1234 h 9 12 3 6 MOD BUS E.D.
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 Figure 17 Service menu icons °C / °F % RH SET + WELLNESS NETWORK ECON +/Table 3 SERVICE SET ALARMS SET UP DO REM SENSORS MOD BUS E.D.
Liebert iCOM Display Components and Functions Table 3 Service menu icons (continued) Icon DO REM SENSORS MOD BUS Name Description Available On Display Service Contact Info Contains key contact information for local service, including names and phone numbers Small & large Liebert iCOM-DO™ Change settings for Liebert iCOM Discrete Output card Large Remote Sensors Change settings for Remote Sensors Large Expansion Device Displays readings of Modbus devices Large E.D.
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 Pressing the On/Off key on a small display will affect only the cooling unit it is mounted on, regardless of whether the cooling unit is a stand-alone unit or part of a network. The small Liebert iCOM display does not have access to the Unit-to-Unit network. NOTE Pressing the On/Off key on a large display of a stand-alone cooling unit will control only that unit. The effect of pressing the On/Off key on a large display connected to a network depends on the view: System or Unit.
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. • • • • Direct expansion units with pressure transducers 70% Chilled water units 60% (available option to 25%) Direct expansion units with low-pressure switches limited to 80%. Direct expansion units with standard scroll or 2-step semi-hermetic compressor(s) limited to 100%.
Operation 3.1.2 Back-Draft Fan Damper—Units with EC Fans 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 Back-Draft Fan Damper—Units with Centrifugal Fans The Liebert iCOM can operate mechanical dampers using digital outputs on the main control board to prevent airflow from entering a standby unit. Dampers can be controlled with or without a damper end switch. If a damper end switch is used, the Liebert iCOM will monitor damper operation and annunciate a Damper Failure event if the damper is not able to open.
Operation Pump Down NOTE The pump down 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. This operation prevents the compressor oil from being diluted with liquid refrigerant to ensure that the compressor is properly lubricated for the next startup.
Operation Setting the counter to 0 will 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 3.1.7 Compressor Sequencing on Two-Compressor Units Compressor Sequencing parameter (Service Menu, Options Setup) is intended to maintain equal run times between compressors. This setting has three selection possibilities: • Always use Compressor 1 as lead compressor. • Always use Compressor 2 as lead compressor. • Auto: • First priority: if the safety timings are acceptable for only one compressor, then it is the next to be started/stopped.
Operation 3.1.10 Service Offset—Changing System Pressure Settings The MBV control is set to maintain a system pressure specific to the particular type of cooling unit. A properly trained and qualified technician can increase or decrease the pressure through the Ball Valve Setpoint Offset found in the Service/Options Setup menu. The range is 0 to 50 PSI; the default is 30 PSI.
Operation Figure 23 DIP switch and jumper locations on Liebert iCOM control board DIP Switches 1, 2, 3 and4 4. 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. 5. 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.
Operation 3.2.4 Fluid Temperature Monitoring Two supply and two return chilled water temperature sensors may be added per unit for local and remote monitoring of water temperature differential temperature. Temperature is monitored with 2T sensors (two sensors on dual circuit units). The first step in setting up the additional supply sensors is to program the DIP switches using Table 5 below. The DIP switches may be access by removing the rear housing or through the precut hole in the housing.
Operation Proportional—If Proportional control is selected, the percent cooling/heating requirement is determined by the difference between the air temperature sensor reading and the temperature setpoint. The Temperature Proportional Band is a user-defined range that is divided into two equal parts for cooling and heating. Figure 25 illustrates how the temperature proportional band is evenly divided on either side of the temperature setpoint.
Operation Proportional Control requires a much tighter proportional band to hold the unit closer to the setpoint, which often results in compressor(s) short cycling or valve hunting. NOTE k is the unit of measure used when U404‚ Temperature Indication, is set to degrees Celsius. K is the conversion from degrees Fahrenheit to degrees Celsius without the -32°F offset. If the proportional band is 20°F, then (20/1.8) = 11.
Operation Temperature Deadband The deadband range is used to widen the setpoint and prevents small temperature changes from activating compressors and valves. When the air temperature falls within the deadband, the control operates the same as if the temperature equaled the setpoint exactly. This setting helps maximize component life by preventing excessive component cycling.
Operation Figure 27 Two single-step compressors without unloaders or one compressor with an unloader (two-step) Cool 2 On Temp Setpoint : 70°F Proportional Band: 8°F Deadband : 2°F Cool 1 On 1/2 Deadband 70 71 72 0% Cooling Cool 1 Off 73 74 75 Cool 2 Off + 100% Cooling 1/2 Proportional Band Increasing Temperature 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%.
Operation Digital Scroll Compressors A digital scroll compressor can modulate its capacity anywhere between 10-100%. This variable capacity modulation allows cooling units to control an environment more precisely. Digital scroll capacity modulation is achieved by energizing and de-energizing a solenoid valve on the compressor. When the solenoid valve is de-energized, the compressor capacity is 100%. When the solenoid valve is energized, the compressor capacity is zero.
Operation 3.3.3 Chilled Water Control A variety of chilled water valves and actuators are offered depending on application requirements. Floating point and analog actuators are common to most applications. Floating point actuators are driven through two digital outputs: Open and Close. As default, Liebert iCOM determines the valve position by timing how long the open or closed signals have been active based on the valve travel time set in the Service menu / Setup submenu.
Operation 3.4.1 Differential Temperatures / Controls (Comparator Circuit) Delta T (Temperature Difference) Between Room and Fluid The comparator circuit determines if the glycol / chilled water temperature of the second cooling source is low enough to provide at least partial cooling capacity. Free-Cooling Fluid Temperature is controlled in the User - Sensor Data menu, Figure 93.
Operation Minimum Chilled Water Temperature—This feature allows the user to select a minimum chilled water temperature to prevent simultaneous operation of the chilled water (free-cooling) and compressor(s) on units factory-programmed to operate both sources simultaneously. This feature is enabled in Service>Setpoints, parameter Minimum CW Temp.
Operation Figure 33 Free-cooling and compressorized operation Dual-Cooling Source Dual-cooling systems operate in the same manner as a GLYCOOL system, except they are factory-configured to operate free-cooling and compressor simultaneously. If simultaneous operation is not desired, contact technical support at 800-543-2778 for assistance. 3.4.2 Liebert Air Economizer™ The Liebert Air Economizer is an option for Liebert downflow units.
Operation Figure 34 Temperature and humidity sensor connections—Liebert DS and Liebert CW C Secure Ring Terminal (for Sensor Cable Shield) Into the Back of the Electric Box (Earth Ground) Both Sensors and Cables are Shipped in Boxes Inside the Liebert Air Economizer Connect P67 on the Control Board to P66 on the Return Air T/H Sensor Using Cable Provided Return Air T/H Sensor Outdoor Air T/H Sensor (identified with outdoor label) B D e -Voltag ible Low n.
Operation Figure 35 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 E P13 Uncoil and Extend Cable Through Holes Provided in Bottom of Unit ltage low-vo ssible . o p w o th sh n s.
Operation 3.5 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 air economizer supplied by others if 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 3.5.1 Liebert Air Economizer™ System Overview The objective of the Liebert Air Economizer is 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. Figure 36 shows an example of the air flow pattern of a Liebert Air Economizer system.
Operation Figure 37 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 Not in Operation 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 38 Operational ranges for chilled water systems and compressor systems Operation range is based on ASHRAE 90.1 If the Liebert iCOM determines that the outside air is unacceptable for use, one or more of the status parameters on SA04 through SA06 will indicate ‘No’ and SA08—Economizer Mode will show Off.
Operation S135 DT1 (Room / Outdoor) Type sets the activation point of the ambient dry bulb outdoor temperature as it relates either to an indoor actual temperature or to the temperature setpoint programmed on line S136. If S135 is 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 NOTE Lines S137 through S141 are not applicable to the Liebert Air Economizer. Outdoor Sensor Sharing When multiple cooling units with Liebert iCOM and Liebert Air Economizer are networked, the control can be set up to share the outside air sensors of all the units connected in the U2U group. Outdoor air sensor sharing is enabled on SA16. When set to Shared, all the outdoor temperature and humidity readings are averaged among all connected units.
Operation Air Economizer Emergency Override The Liebert Air Economizer can be configured to override SA04 through SA07 in the event the facility gets too hot. This override becomes active if the room temperature exceeds an adjustable high temperature high return temperature threshold set on line SA10. The emergency override will open the outdoor air damper and close the indoor air damper.
Operation 3.6.1 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 3.6.2 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 3.3.2 - Compressor Control. Figure 44 illustrates how SCR reheat operates when SCR Control Type is set to Standard mode.
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 temperature setpoint. The adjusted humidity setpoint is used for humidification percent requirement determination.
Operation When the return air humidity deviates from the setpoint, either humidification or dehumidification 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 3.7.1 Humidification Infrared Humidifier There are two types of infrared humidifiers: small pan (IFS) and large pan (IFL). The operating mode of each is similar, however, some of the variables or timings differ because of the size of the pan. Infrared humidifiers are started at 100% humidification request and stopped at 0%. Infrared humidifiers cannot be driven in proportional mode.
Operation Dehumidification Low Limit Figure 46 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. Low Limit 1 and Low Limit 2 are used to avoid overcooling a room during dehumidification. When a low limit is reached, a compressor or the liquid cooling source that is used for dehumidification is disabled. It is re-enabled when the air temperature rises.
Operation To avoid the dehumidification lockout: • Increase the heat load for efficient operation • Decrease S133 LL settings slightly • Where applicable, decrease the reheat proportional band. This will allow the reheats to activate sooner, helping to prevent the low return condition. 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.
Operation Figure 47 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 The call for heating is based on the deviation between the dehumidification reheat se
Operation 3.8 Supply Control Up to 11 supply air sensors thermistors may be connected per unit, used as control or reference of the discharge air temperature of the cooling unit. The supply temperature sensors should be installed in an area that is influenced only by the unit it is connected to. The supply sensor should be 5-15 ft. (1.5-4.5m) from the cooling unit to provide an accurate reading for the control. Two sensor types are available for purchase.
Operation Enable the corresponding sensors to be included in the aggregate temperature measurement. Set the aggregation method to average or maximum. The aggregated temperature will be displayed at the bottom of the screen. • Supply Control: When the supply sensor is set to Control, the unit will control the amount of cooling / heating being provided based on maintaining the discharge air temperature.
Operation 3.9.1 Operation Inlet Rack Temperature Control The Liebert iCOM Optimized Aisle control monitors the inlet temperature to the racks using up to 20 rack temperature sensors that are connected to a Liebert iCOM control. These inlet rack temperature sensors are used to control the air flow (fan speed) of each unit.
Operation Figure 49 Return Compensation Setpoint in Service Menu Calculated Return Compensation Setpoint Figure 50 Return Compensation in Unit View Return Compensation in Unit View 61 Liebert® iCOM®
Operation Figure 51 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 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.
Operation Figure 53 Supply compensation Lo w er S up pl y Fan Speed 100% When supply air compensation has been invoked, it will be indicated on the unit view by a small downward-pointing arrow. See Figure 54. Figure 54 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 How many degrees the supply temperature will be lowered while supply compensation is invoked depends on how many degrees the fan controlling temperature has exceeded the control band compared to S116 Supply Compensation Value. Example: With a Fan Setpoint of 70ºF and Proportional band of 10ºF, 0ºF deadband, the fan speed is 100% when the rack temperature is 75ºF.
Operation 3.9.2 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 up to four static pressure sensors connected to available analog inputs to modulate the fan speed as part of Optimized Aisle Control. The user can aggregate multiple sensor readings to control server airflow based on an average, maximum or minimum reading of the connected sensors.
Operation Figure 60 S190 Limit SP Lower Range SP Upper Range Static Pressure Range SP Deadband increase rate Fastest fanspeed increase rate Slowest fanspeed SP Fanspeed P-Band SP Setpoint Figure 61 S190 Control SP Lower Range SP Upper Range Static Pressure Range SP Deadband SP Setpoint 67 Fastest fanspeed increase rate SP Fanspeed P-Band Slowest fanspeed increase rate Fastest fanspeed increase rate SP Fanspeed P -Band Liebert® iCOM®
Operation 3.10 Event Types and Properties Liebert iCOM events are used to inform the user of cooling unit operational status. All events are recorded in the Event Log, which is in the User Menu. The user can change the type (alarm, warn, message) and time delay of some events and can also enable or disable some events. These event settings are in the Service Menu under Set Alarms, pages 3 to 10. If an event has a safety function (high pressure, low pressure, main fan overload, etc.
Operation Table 11 Possible event settings—some events not available in all units Internal Delay (Before Action Occurs) Default Delay / Selectable (Before Action Occurs) Type (default) MAIN FAN OVERLOAD 2 seconds 5 seconds / 0 – 9999 * ALM LOSS OF AIRFLOW 3 seconds 3 seconds / 0 – 9999 * ALM CLOGGED FILTERS 2 seconds 2 seconds / 0 – 9999 * WRN HIGH ROOM TEMP 1 Min After Fan On 30 seconds / 0 – 9999 Fixed to WRN LOW ROOM TEMP 1 Min After Fan On 30 seconds / 0 – 9999 Fixed to WRN HIGH
Operation Table 11 Possible event settings—some events not available in all units (continued) Internal Delay (Before Action Occurs) Default Delay / Selectable (Before Action Occurs) Type (default) FC LOCKOUT 2 Sec 2 sec / 0 – 9999 * WRN COMPRESSOR(S) LOCKOUT 2 Sec 2 sec / 0 – 9999 * WRN COMP 1 SHORT CYCLE 0 Sec 0 - 9999 MSG COMP 2 SHORT CYCLE 0 Sec 0 - 9999 MSG No Power 0 0 seconds / 0-9999 WRN Condensate 1 Failure 0 5 seconds / 0-9999 WRN Condensate 2 Failure 0 5 seconds / 0-
Operation 3.10.2 User Inputs The user can connect and specify up to four custom alarm inputs, also known as remote alarm devices (RAD), depending on unit configuration. Two optional customer inputs are available on some cooling units. The optional inputs are not available on units equipped with low-pressure switches on Liebert DX equipment. Low-pressure transducers may be field-installed in lieu of low pressure switches if additional customer inputs are desired.
Operation Table 12 Customer inputs (continued) Setting Reaction COND 1 FAIL Event Only COND 2 FAIL Event Only D-SCROLL RED Event + Reduces the Requested Compressor Capacity by 20% SWAP VALVE No Event -Active X Valve Closes and Y Opens / Inactive Y Closes and X Opens EC FAN FAULT Event + Sets Analog Output to 10V ECO AIRFLOW Event + Reduces Liebert Air Economizer Airflow DAMPERSWITCH Damper + End Switch POWER A Event Only POWER B Event Only 3.10.
Operation Table 14 Analog connection control board switch position Analog Input # Input #1 Input #2 Input #3 Input #4 1 2 3 4 5 6 7 8 0 to 10VDC Off Off Off Off Off Off Off Off 0 to 5VDC On Off On Off On Off On Off 4 to 20mA On On On On On On On On Control Board Switch Number Analog Input Device Value Switches #9 and #10 not applicable; 4 to 20mA settings supported only for manual fan control. 3.10.
Operation 3.10.5 Possible Event Notifications Table 16 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 4.2.1 Application of Teamwork Modes All units in a network will run in the same Teamwork Mode.
Teamwork The master unit determines that a 60% call for cooling is required for the system. Since there are two available cooling units, each unit makes up half of the system proportional band; Unit 1 handles 0-50% system call for cooling and Unit 2 handles 51-100%. For every 1% system call for cooling, each unit provides 2% of its total cooling capacity. The 60% system call for cooling exceeds the 50% Unit 1 can provide, so Unit 1 operates at full capacity.
Teamwork 4.2.5 Teamwork Mode 3 (Optimized Aisle) Teamwork Mode 3 can be selected when the units are set to operate in Optimized Aisle Control mode and have been connected in a unit-to-unit network. Teamwork provides coordination between the units that will prevent “fighting” by not allowing units to operate in conflicting modes of operation at the same time by selecting which mode to operate within based on the average of the collective unit sensors (Cooling vs. Heating and Humidifying vs. Dehumidifying).
Teamwork Lead / Lag - Failure Scenarios When redundancy configurations are required, the Liebert iCOM unit-to-unit network has built in fail-over conditions that require no building management interaction. The first and possibly most common failure scenario is a single unit or component failure. In this situation, the Liebert iCOM will automatically activate a standby unit in the place of the failed unit. Unit-to-Unit and sensor failure scenarios have also been programmed into the Liebert iCOM controller.
Teamwork Figure 66 Remote sensors Figure 67 Sensor positioning Supply (Discharge) Temperature Sensor Inlet Rack Temperature Sensors (sensors in each row) Liebert® iCOM® 82
Teamwork 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 CANbus. This can be done by: • Moving the return temperature sensor from the cooling unit to the cold aisle with a longer CANbus cable —OR BY— • Obtaining a remote temperature sensor and addressing it to operate as the return temperature sensor. • An additional supply temperature sensor placed under the raised floor. 4.
Teamwork 4.3.1 Tools Required for Installation • • • • 4.3.2 Small, non-conductive tool for setting control DIP switches Medium flat-head screw driver for opening electric panel protective dead-front. Cutting tool to trim cable ties Small Phillips-head screwdriver to open 2T housing DIP Switch Settings The individual 2T sensor must be given a unique address on the CANbus cable run to the associated Liebert unit. DIP switches are used to give the 2T sensor its unique address.
Teamwork Set 2T Sensor Identities - DIP Switch Settings 1. Confirm that the DIP switches are set correctly for all 2T sensors. 2. Apply numbered stickers to the sensor housings, corresponding to sensor chain position. 3. Based on the sensor number, use the included DIP switch tool to set the DIP switches according to Table 17. If the settings are difficult to make through the opening in the housing or if the hole is not present, open the case by removing the three Phillips-head screws.
Teamwork Terminating Last 2T Sensor The last 2T sensor on the network, which can be identified by only having one CAN cable plugged into it, must be terminated. All other 2T sensors on the network must remain unterminated. The following pictures show the location of the jumper that determines if the 2T sensor is terminated. To terminate a 2T sensor: 1. 2. 3. 4. Open the sensor’s case by removing the three screws that hold it together.
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 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. The grounds are connected at each 2T sensor and must be terminated to a field-installed ground ring in the low-voltage electrical panel.
Teamwork 4.3.6 Connecting the CANbus cable at the Unit and Securing the CANbus Cable to Ground ! 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.
Teamwork 4.3.7 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, tandem 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 Network communication can be configured during system startup by a Liebert-trained technician. For technical issues contact: Emerson Technical Service 1050 Dearborn Drive Columbus, Ohio 43235 Telephone: 1-800-LIEBSRV (800-543-2778) E-Mail: technicalservice@emersonnetworkpower.com 5.3.
Installing a Liebert iCOM Unit-to-Unit Network Large Displays A network switch is required to enable Ethernet communication on one or more cooling units with large displays. Each cooling unit with a large display requires two straight-through Ethernet cables from a network switch. One cable connects to port P64 on the Liebert iCOM input/output board and the other straight-through cable connects to the female-female coupler, if the female-to-female coupler is provided with the unit.
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 80 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) Liebert® iCOM® 96
Installing a Liebert iCOM Unit-to-Unit Network Figure 81 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® The user can define fail-safe sequences if communication with the BMS is lost. These sequences help ensure that the conditioned space is not compromised if communication between the BMS and the Liebert iCOM is lost. These fail-safe modes include: • BMS Backup Temp Setpoint—Allows the unit to operate off a predefined temperature setpoint.
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 86 Setpoints screen, page 2 U113 2nd Temperature Setpoint—Provides a way to program an alternate temperature setpoint that is activated by a dry contact through the customer inputs connections. When a customer input connection is set to “2nd Setpoint” and the input is wired to that input is active, then the value set in this parameter sets the active temperature setpoint. This parameter is adjustable from 41°F to 81°F (5 to 27.2°C). The factory default is 41°F (5°C).
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 87 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 89 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 90 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 is 75°F.
User Menu Parameters Figure 91 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 92 Set alarms screen, page 4 U235 Static Pressure Messages—Enables or disables the static pressure alarms.
User Menu Parameters 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 is 1.284 inWC. U241 SP Transducer Low Range—Sets the pressure range at which the Low Static Pressure Out of Range Alarm is activated. This parameter range is adjustable from 0.000 - 1.395 inWC. The factory default is 0.000 inWC. 7.
User Menu Parameters U305 FC Status / Amb Temp—Displays the operating status of air side economizer (left hand value) and displays the current outside air temperature (right hand value). The operating status values include: Off, Start and On. U305 Freecooling Status—Displays the operating status of free cool or dual cool economizer (left hand value) and displays the current outside air temperature (right hand value). The operating status values include: Off, Start and On.
User Menu Parameters Figure 94 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 95 Sensor data screen, page 3 U325 Remote / Auxiliary Sensors - Unit Information—read only text describing screen features. U326 REM Sensors set to Control—Read-only parameter that shows the number of sensor set to control (left hand value) and the sensor control type used (right hand value). If the sensors are used for reference only, the right hand value will display None. Otherwise the right hand value will display the sensor control mode such as Cool, Fan or Cool + Fan.
User Menu Parameters Figure 96 Sensor data screen, page 4 U337 Remote / Auxiliary Sensors - System Information—Read-only text describing screen features. U338 Teamwork Mode—Read-only parameter describes what U2U teamwork mode the unit is operating in. U339 Teamwork Aggregation Method—Read-only parameter is viewable only in Teamwork 1 and 3 with temperature or fan control sensor set to Remote. This parameter describes if the teamwork control is based on the average or maximum sensor readings in the group.
User Menu Parameters Figure 97 Sensor data screen, page 5 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 Figure 167 through 172 for a list of analog input devices. The analog input device is setup in the Service menu and could consist of: Air Pressure, Pressure, Temperature or Percent. Active Alarms Active Alarms—Permits viewing all current, active alarms. 7.
User Menu Parameters U402 Date—Sets the internal date of the unit. If this unit is connected to other units with the unit to unit network connection, all units will reflect the last date set. U403 Time—Sets the internal time of the unit. If this unit is connected to other units with the unit to unit network connection, all units will reflect the last time set. The control tracks time using a 24-hour clock. U404 Temperature Indication—Selects the actual and set point temperature indication.
User Menu Parameters Figure 99 Display setup screen, page 2 U414 Additional Readouts—Selects whether fluid flow is displayed in the unit view. U415 Show Supply Temp @ Unit Off—Hides or shows the supply air temperature when the unit is in monitoring Off, display Off, in remote shutdown or in standby mode. This feature is typically used by BMS integrators to prevent nuisance high supply temperature alarms while the unit is not cooling.
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 101 Sleep 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 102 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 103 Condenser timer screen—page 2 U813 Select Condenser #— # represents the alternate condenser connected. Toggles between Condenser 1 and 2. When Select Condenser 2 is shown, the parameters U814 through U820 apply to Condenser 1. When Select Condenser 1 is shown, parameters U814 through U820 apply to Condenser 2. U814 Fan Reversal Every x Days— Sets the numbers of days between fan reversals; adjustable from 1-100 days. The default 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.
Service Menu Parameters 8.1 Service-Setpoints Menu Screens Setpoints allow the user to view, change and set all temperature- and humidity-related parameters. Figure 106 Setpoints screen, page 1 of 10 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.
Service Menu Parameters S110 Supply Limit Enabled/Setpoint—Chilled water units may be set up with the supply air sensor to maintain a minimum air temperature under a raised floor to help prevent condensation. In order to avoid supply temperatures that are too low, the Supply Limit can influence the opening of three-point or analog actuators or the output of analog valves.
Service Menu Parameters S120 CW Cap Filter at 0 - 100%— The CW Filter at 0% / 100% Controls the rate of change during a valve position adjustment 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 S126 Humidity Control Type—The left hand value selects the humidity control calculation. Setting this parameter to Relative will control the humidity without considering any temperature deviations. Predictive and Absolute control consider the temperature deviation from temperature setpoint so that a constant level of moisture is kept in the area based on the humidity sensor reading and the temperature deviation from setpoint. The factory default is Predictive (see 3.
Service Menu Parameters Figure 109 Setpoints screen, page 4 of 10 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. See 3.5.2 Liebert Air Economizer Control Settings for more information. S136 DT1 (Room/Outdoor) Value—Field-adjustable setpoint or temperature. Type (setpoint or temperature) is based on the setting on S135.
Service Menu Parameters Figure 110 Setpoints screen, page 5 of 10 S146 Fan Control Sensor—Controls the fan speed for modulation. Options for this setting are Supply, Return, Remote, and Manual Mode. If manual mode is selected, then the fan speed can be controlled from the local display or through a building management system. S147 Fan Setpoint—Activated when a temperature sensor is being used to control the fan speed.
Service Menu Parameters S153 Fanspeed Dehum/No Power—Sets the fan speed when a call for dehumidification is active. This allows the unit’s fan speed to be reduced to help with any overcooling due to dehumidification. This also allows the coil to remove additional moisture faster. S154 Allow Fan Modulation on Comp—Permits setting the fan to fixed speed if the unit is equipped with compressors. Two options are available: No, Yes (factory default).
Service Menu Parameters different modes of operation. For example, if the fans are operating based on a call for reheat which is normally 100% fan speed and the reheats are turned Off or no longer needed then the fan speed would instantly change if this filter is not applied, which may cause instability in the fan speed control. This filter helps with the transition to avoid overshoot.
Service Menu Parameters Figure 112 Setpoints screen, page 7 of 10 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 because motor and or bearing degradation may occur at the low fan speeds required.
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 in 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 Figure 114 Setpoints screen, page 9 of 10 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 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 0.010 - 1.003 inWC. The default is 0.020 inWC. S192 SP Deadband—Sets the static pressure deadband.
Service Menu Parameters S1A1 SP Upper Range—The control calculates the Upper Range by using S191 SP Setpoint and S192 SP Deadband, the results on lines show both values, in WC and Pa. S1A2 SP Lower Range—The control calculates the Lower Range by using S191 SP Setpoint and S192 SP Deadband, the results on lines show both values, in WC and Pa. Figure 115 Setpoints screen, page 10 of 10 S1A4 SP Control Override Sensor—Programs override static pressure control the room temperature gets too warm.
Service Menu Parameters Service—Unit Diary Menu Screens (Large Display Only) Unit Diary—Shows all entered program changes and maintenance performed on the unit. The Unit Diary serves as a note pad, where information can be added through the Liebert iCOM Service Tool. 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.
Service Menu Parameters Figure 117 Standby settings / lead-lag screen, page 2 S515 Cascade Units—Allows units to activate in Standby mode if the room temperature cannot be maintained by the active units. If Yes is selected, the cascaded units can perform all functions when activated from standby. This parameter can also be set for Cooling Only or Cool / Heat / Fan (available in Teamwork 3 only).
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 119 Wellness—Motor settings screen, page 2 of 9 Figure 120 Wellness—Compressor 1 settings screen, page 3 of 9 137 Liebert® iCOM®
Service Menu Parameters Figure 121 Wellness—Compressor 2 settings screen, page 4 of 9 Figure 122 Wellness—Electric heater 1 settings screen, page 5 of 9 Liebert® iCOM® 138
Service Menu Parameters Figure 123 Wellness—Electric heater 2 settings screen, page 6 of 9 Figure 124 Wellness—Electric heater 3 settings screen, page 7 of 9 139 Liebert® iCOM®
Service Menu Parameters Figure 125 Wellness—Humidifier settings screen, page 8 of 9 Figure 126 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 127 Diagnostics/service mode screen, page 1 of 8 S302 HP Alarm Code C1/C2—Compressor 1 high-pressure alarm code is the left hand parameter and Compressor 2 is the right hand parameter: 0 = no alarm; 2 = high-pressure alarm active.
Service Menu Parameters Figure 128 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 129 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 130 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 131 Diagnostics/service mode screen, page 5 of 8 Status Remote Shutdown—Shows the status of the unit’s remote shutdown 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 132 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 Figure 135 Set alarms screen, page 1 of 11 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. S204 Low Return Temperature—Sets the threshold temperature when a return low temperature alarm will occur.
Service Menu Parameters Figure 136 Set alarms screen, page 2 of 11 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 S222 Warning Activates Alarm Relay—Sets the alarm relay (K3) to activate when a warning occurs. S22A Water Alarm Shuts Unit Down—Turns the unit Off if a water alarm occurs. S22B Operation on Sensor Failure—Selects function to occur if the temperature control sensor fails. This parameter allows the user to default the unit to Full Cooling mode or Unit Off when a sensor fails.
Service Menu Parameters Figure 138 Set alarms screen, page 4 of 11 Figure 139 Set alarms screen, page 5 of 11 151 Liebert® iCOM®
Service Menu Parameters Figure 140 Set alarms screen, page 6 of 11 Figure 141 Set alarms screen, page 7 of 11 Liebert® iCOM® 152
Service Menu Parameters Figure 142 Set alarms screen, page 8 of 11 Figure 143 Set alarms screen, page 9 of 11 153 Liebert® iCOM®
Service Menu Parameters Figure 144 Set alarms screen, page 10 of 11 Figure 145 Set alarms screen, page 11 of 11 Liebert® iCOM® 154
Service Menu Parameters 8.6 Service-iCOM-DO Setup Menu Screens The iCOM-DO Setup menu is used to configure the Liebert iCOM-DO. Figure 146 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 controller area network (CAN) bus.
Service Menu Parameters Figure 147 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 149 Sensor calibration setup screen, page 1 of 12 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 150 Sensor calibration/setup screen, page 2 of 12 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.
Service Menu Parameters S628 Supply/Return Sensor—Applies to both supply and return sensors; adjusts the supply temperature reading from the actual sensor to compensate for any sensor error or to match other sensors in the room. S629 Calibrated Supply/Return Sensor—Applies to both supply and return sensors. Liebert iCOM will automatically detect the sensor connected and update the parameter name to reflect the sensor location; shows the adjusted temperature value of the supply sensor.
Service Menu Parameters Figure 153 Sensor calibration/setup screen, page 5 of 12 Each unit can be equipped with a total of 20 rack sensor readings or ten 2T temperature sensor modules. These menus permit temperature sensor calibration by entering a negative or positive offset. The calibrated reading is displayed in the far right column. If a value does not appear in the far right column, then the sensor is either not set up correctly or is not connected.
Service Menu Parameters S661 Number of EC Fans—Sets the unit of number of EC fans. This parameter is selectable between 1 and 5. The factory default is 3. S662 Inlet Ring K-Value—Sets the inlet ring K-Value. This parameter is selectable between 1 and 999. The factory default is 480. S664 Results:—Read-only string that describes S665 through S668. S665 DP Transducer Low—Shows the status of the low differential pressure transducer in both inWC and Pa after it’s setup at S659.
Service Menu Parameters Figure 156 Sensor calibration/setup screen, page 9 of 12 S696 FL1 Transducer is Connected to—Sets the analog input and the input range that will be used with the flow meter. This parameter is selectable from None, Ana In 1, Ana In 2, Ana In 3 and Ana In 4. The factory default is None. The input range options are 0-5VDC, 0-10VDC, and 4-20mA. S697 FL2 Transducer is Connected to—Sets the analog input and the input range that will be used with the flow meter.
Service Menu Parameters Figure 157 Sensor calibration/setup screen, page 10 of 12 S6B1 Chilled Water Sensor Type—Used for selecting the type and number of fluid sensors installed. Two options are available: 2T and Dual 2T. The 2T option is used on units equipped with one flow meter and Dual 2T is used for units with two flow meters. S6B2 CW Temp Sensor Placement (CW T Sensor C1 / C2 Placement w/Dual 2T)—Allows swapping the chilled water sensor readout in the display.
Service Menu Parameters Figure 158 Sensor calibration/setup screen, page 11 of 12 S6C5 Supply Sensor Aggregation—Five additional supply air sensors (2T sensors) may be connected for control purposes. This parameter enables and disables the additional supply air sensors for control purposes. S6C6 Supply NTC—Allows including or excluding the sensor reading from the Maximum or Average Aggregation Method.
Service Menu Parameters Figure 159 Sensor calibration/setup screen, page 12 of 12 S6D9 Supply Sensor NTC or PTC—Supports only the NTC selection. S6E1 Supply NTC Offset / Read—The left hand parameter adjusts the supply temperature reading from the actual sensor to compensate for any sensor error or to match other sensors in the conditioned space. The right hand parameter shows the calibrated value in degrees Celsius or degrees Fahrenheit.
Service Menu Parameters S6E9 Sensor_D R Offset / Read—The left hand parameter adjusts the thermistor temperature leaving the right side of supply Sensor D to compensate for any sensor error or to match other sensors in the conditioned space. The right hand parameter shows the calibrated value in degrees Celsius or degrees Fahrenheit.
Service Menu Parameters SA07 Stop ECO at Setpoint + —Sets the temperature when the Liebert Air Economizer will be disabled due to an increasing outdoor air temperature. This parameter is added to the return air sensor setpoint and then compared to the outdoor temperature reading. If the outdoor temperature reading exceeds the return air temperature setpoint plus this parameter, the Liebert Air Economizer will be disabled. This is factory-set at 20°F (-6.7°C).
Service Menu Parameters Figure 162 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 163 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 164 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 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 166 System/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 167 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 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. The factory default is 5 minutes.
Service Menu Parameters Figure 169 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 170 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 171 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 172 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 is none. NOTE: Unit Code 16 can set the output for this parameter. The Q15 output is rated up to 27VAC and 2A.
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 173 Remote sensors, page 1 of 2 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.
Service Menu Parameters Figure 174 Remote sensors, page 2 of 2 SB15 Auxiliary Air Temperature- enables or disables the wireless sensor connection. SB16 Auxiliary Proxy Status—displays the proxy server communication status. Status's include 'initializing', 'active', 'inactive or lost. • Initializing: Displayed immediately after the start of the Liebert iCOM process responsible for tracking the communication state, or immediately after the Auxiliary Air Temperature value is enabled.
Service Menu Parameters Example: X = Auxiliary Weighting in TW AVG T0= The temperature reported by the master n= number of units in the group T1 through Tn = the wired sensors connected to each unit in the U2U group. The temperature reported by each unit is based on the Individual Remote Sensor Mode and Unit Remote Sensor Mode/AVG incl.
Service Menu Parameters Figure 176 Expansion device, pages 2 and 3 SC16-SC21, SC31-SC35—Displays device names (read only), permits enabling or disabling each device, and displays the Modbus address, device type (read only), user description and device status (read only).
Service Menu Parameters Liebert® iCOM® 184
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.
