Liebert® iCOM® for Liebert DSE™ User Manual -Intelligent Communications & Monitoring for Liebert DSE™ with Software Version PA2.03.
TABLE OF CONTENTS 1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 LIEBERT ICOM DISPLAY COMPONENTS AND FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . .2 2.1 Accessing and Identifying Status Screens . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.9 Event Types and Properties. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 3.9.1 3.9.2 3.9.3 3.9.4 3.9.5 3.10 High- and Low-Temperature and Humidity Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . User Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.0 SERVICE MENU PARAMETERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 8.1 Service-Setpoints Menu Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 8.2 Service—Standby Settings / Lead Lag Menu Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117 8.3 Service-Maintenance / Wellness Menu Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 8.
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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 Economizer, page 1 of 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Economizer, page 2 of 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Economizer, page 3 of 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 large display has the layout shown in Figure 2.
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 2.1 Liebert iCOM default screen symbols fan cooling hot water electric heat freecooling dehumidification maintenance humidification Accessing and Identifying Status Screens The iCOM control has five different status screens that provide the user with information about the unit such as component operating status, active alarms, and operating temperature. The status screens include: • • • • 2.1.
Liebert iCOM Display Components and Functions Figure 4 System screen—graphical interface NOTE The graphical system screen is shown above. The System screen type may be programmed differently based on user preference. See Liebert iCOM Display Readout on page 10 for more information. System Screen with Rack View of Sensors The System Screen with Rack View of Sensors will display the average, maximum and minimum of all connected sensors for the supply, return and remote sensors.
Liebert iCOM Display Components and Functions Unit Screen The Unit screen provides a summary of individual unit operations, temperatures and unit status. The temperatures 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. Figure 6 Unit screen NOTE A simple unit screen is shown above.
Liebert iCOM Display Components and Functions Unit Screen with Rack View of Sensors The temperatures shown at the top of the unit screen with rack view of sensors 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 Unit Screen with EconoPhase View The unit screen with EconoPhase View provides a summary of individual unit operations including return and supply temperatures, EconoPhase Status, Pump Status, and other key information to the EconoPhase circuit.
Liebert iCOM Display Components and Functions 2.2 Navigating Through the Liebert iCOM Menus Liebert iCOM shows icons and text for monitoring and controlling your Liebert cooling units or network of cooling units. The number of icons and amount of text shown depends on the display size. 2.2.1 Control Interface When the buttons on the Liebert iCOM have not been pressed for a short period, the display backlight turns off.
Liebert iCOM Display Components and Functions Figure 10 Navigation from system view to unit view to rack view to EconoPhase view—U2U network. Display Filtering Display filtering permits displaying only a single unit in the network on the large display. This allows each cooling unit to have a large display that acts as a local display Filtering can be enabled in the User/Display menu. Liebert iCOM Display Readout The Liebert iCOM supports multiple unit and system screen layouts.
Liebert iCOM Display Components and Functions Accessing Submenus The Liebert iCOM has three main menus; User, Service and Advanced. 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. NOTE Menu settings may be viewed without a password, but changing settings requires a password.
Liebert iCOM Display Components and Functions 2.2.3 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—Stand-alone Unit 1 will be displayed in the top right corner of the screen.
Liebert iCOM Display Components and Functions 2.2.4 Viewing Multiple Units with a Networked 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 and descriptions User Menu password: 1490 Table 3 User menu icons Icon Name °C / °F % RH SET EVENT LOG SET ALARMS ! Description Setpoints View and change temperature and humidity setpoints Spare Part List Displays the various part numbers of the components/parts in the cooling unit Event Log Contains last 400 events Graphics Displays temperature and humidity graphs View Network Shows status of all connected units S
Liebert iCOM Display Components and Functions Table 3 User menu icons (continued) Icon Name 1234h Description Total Run Hours Records the run time of all components and allows setting of limits on run time Sleep Mode Allows setback settings for non-peak operation Service Contact Info Contains key contact information for local service, including names and phone numbers Condenser Timer Displays the timer settings for the Liebert MC™ (microchannel condenser) 12 9 3 6 Liebert® iCOM® for Liebert
Liebert iCOM Display Components and Functions Figure 15 Service menu icons and descriptions Service Menu password: 5010 Table 4 Service menu icons Icon °C / °F % RH SET Name Description Setpoints To view and change temperature and humidity setpoints Unit Diary Shows all entered program changes and maintenance performed on the unit Standby Settings/ Lead-Lag Allows lead/lag setup when multiple units are connected Maintenance/ Wellness Settings Allows setting maintenance interval reminder, mai
Liebert iCOM Display Components and Functions Table 4 Service menu icons (continued) Icon DO REM SENSORS Name Description Service Contact Info Contains key contact information for local service, including names and phone numbers Liebert iCOM-DO™ Change settings for Liebert iCOM Discrete Output card Remote Sensors Change settings for Remote Sensors Liebert® iCOM® for Liebert DSE™ 18
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 are 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 Each time a unit is powered on or off, an event is added to the Event Log in the User menu. NOTE Customer switches: remote On/Off (if used) and display On/Off switches are in series. A cooling unit will start only if both switches are On; if one of these switches is Off, the unit will stop. Safety devices within the unit are also in series and will shut the unit down if applicable.
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 The Liebert DSE is designed to control fan speed down to 55%. Contact your local Emerson dealer for more information if fan speed minimum settings must be lowered. Additional fan speed configuration parameters include a fan speed filter and fan speed reposition delay timer. These parameters allow fine tuning the fan speed control and, except for setting to Manual, are applicable to any other operation mode set in the VSD fan speed setting.
Operation Figure 19 Energy efficiency—No bypass air, EC fan damper 3.1.3 General Compressor Operation 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 High Pressure Alarm When the compressor is initially activated, the system will be monitored for a high pressure situation. When a high pressure situation is detected during the first 10 minutes of operation, the unit will attempt to correct the problem several times without notification. If the unit is unsuccessful in correcting the problem, an alarm will occur and the affected compressor will be locked Off.
Operation Supported Compressor Types • • • • 4-Step Digital Scroll Tandem Digital No standard scroll support Digital Scroll High Temperature A protective maximum operating compressor temperature limit is imposed on units with digital scroll compressor(s) with thermistor. If the digital scroll temperature reaches the maximum temperature threshold, the compressor will be locked out for at least 30 minutes and an alarm will be annunciated.
Operation 3.2 Temperature Control The Liebert DSE must be operated in a conditioned space within the operating envelope ASHRAE recommends for data centers: Maximum return air temperature of 105°F (40°C). The recommended minimum return air temperature setpoint for the Liebert DSE is 75°F (24°C). Operating outside this envelope can decrease equipment reliability. Refer to ASHRAE’s publication, “Thermal Guidelines for Data Processing Environments.
Operation The integral term (sometimes called “reset action”) is calculated by measuring how much and how long the air temperature/humidity has been above or below the setpoint. If the actual air temperature/humidity is above the setpoint, the percent requirement is slowly but continuously increased until the total is sufficient to bring the return room air back to the setpoint. The control helps to ensure temperature setpoint is achieved while efficiently operating the equipment.
Operation 3.2.1 Setting Up PI Control Three to 5 minutes integration time is usually good for most applications. The proportional band may depend on the amount of heat load and other factors. Use Table 6 as a guide for making the PI control settings. Table 6 PI control troubleshooting Problem Solution Unit is too slow to activate cooling. Decrease the proportional band slightly and monitor operation. Compressor short cycle alarm.
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 23. When a compressor is started, the solenoid is energized longer than it is de-energized to match the call for cooling.
Operation 3.3 Tandem Compressors Liebert digital tandem compressors will modulate the digital and fixed compressors to satisfy the temperature setpoint. Both digital tandem compressor sets work together to provide cooling and limiting moisture removal by utilizing both circuits. One of the two compressors is a digital compressor and the other is a fixed-capacity standard scroll compressor. In the digital tandem set, Circuit 1 makes up the outer coil and has two compressors connected to the circuit.
Operation The digital compressor within the tandem compressor set will be activated upon a call for cooling. This compressor can ramp between 20% and 100% capacity to meet the room load. If the call for cooling increases above its available capacity the fixed compressor within that tandem compressor set will be activated and the digital compressor ramps down to its minimum speed.The Liebert DSE activates the compressors in the following manner based on the amount of cooling needed.
Operation 3.4.1 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 Humidity Control Several humidifier options may be installed on a particular Liebert DSE, depending on model unit and application requirements. In some humidifier applications, operation is limited to 80°F (26°C) return air temperature. If the return air temperature reaches the lockout threshold of 80°F (26°C) or higher during operation, the humidifier will be disabled. After reaching the lockout threshold, the temperature must fall to 70°F (21°C) before the humidifier becomes operational.
Operation The default control for humidity and dehumidification is based on dew point temperature. This prevents the humidifier from running when not required (especially when return air temperatures exceed 75°F [24°C]). The Liebert DSE must be operated in a conditioned space within the operating envelope ASHRAE recommends for data centers. The maximum recommended dew point is 59°F (15°C). Operating outside this envelope can decrease equipment reliability.
Operation PI—If PI Control is selected, the percent humidification/heating requirement is calculated by combining two methods, proportional and integral. The proportional term is calculated in a manner similar to the previously described Proportional control. The integral term (sometimes called “reset action”) is calculated by measuring how much and how long the air humidity has been above or below the setpoint.
Operation External Humidifier Control—Optional A factory-supplied option may be provided to allow a start-stop command to be sent to the control of a remote-mounted humidifier. 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. 3.5.
Operation Dehumidification Low Limit Figure 28 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.
Operation 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. The Low Limit 1 and 2 settings are in the Service menu under Setpoints. Low Limit 1: Low Limit 1 will disable one of two compressors for dehumidification.
Operation Tandem Digital Scroll Operation for Dehumidification When tandem digital scroll compressors are present, the activation and deactivation of dehumidification will be handled just as it would for conventional compressor operation. The rules described in this section apply only when dehumidification is active. Further, the activation or deactivation of compressors for certain alarm conditions, or Suction Pressure Management, take precedence over the rules described in the ensuing subsections.
Operation Dehumidification Operation • Dehumidification with four compressors operates until there is a call for the first stage reheat. • Dehumidification with three compressors operates until there is a call for the second stage reheat or LL1 is reached • Dehumidification with two compressors is allowed to operate with full reheats until the LL2 threshold is met • Digital compressors will operate when the unit is in 2 compressor dehum operation.
Operation Dehumidification with Two Compressors (DH Stage 1) • Compressors C1A and C2A must be On, while compressors C2B and C1B must be Off. • The C1A digital compressor must be loaded at 100% at all times. • The C2A digital compressor will adjust its loading based on whether the Call for Dehumidification is greater than the Call for Cooling: If the CFD is greater than or equal to the CFC, C2A must use the ramp on line DH05 (“C2A CFC @ 0% / 100% Dehum Ramp”) with the CFD used to determine ramp %.
Operation Dehum Operation with One Compressor Out on Alarm This type of dehumidification operation will resemble DH Stage 2, except for the rules listed below. If the compressor with the alarm resides in Tandem Bank 1 (C1A or C1B)… • If Compressor 1B is out on alarm, operation will be identical to that of DH Stage 2, except that if the CFC goes above the value on line DH02, C1B will not be restarted.
Operation 3.6 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 sensor must be located 5-15 ft. (1.5-4.5m) from the unit to provide an accurate reading for the control. Figure 30 Placing the supply air temperature sensor Internal Temperature and Humidity Sensor Return Air 5 to 15feet (1.5 to 4.
Operation 3.6.1 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 32 Return Compensation in Unit View Return Compensation in Unit View Figure 33 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 45 Liebert® iCOM® for Liebert DSE™
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 33.
Operation When supply air compensation has been invoked, it will be indicated on the unit view by a small downward-pointing arrow. See Figure 36. Figure 36 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 3.7 Liebert DSE—Basic Control System Overview The Liebert DSE with Liebert EconoPhase system includes three primary control systems: • Liebert DSE (Indoor unit)—Contains the Liebert iCOM control board, large Liebert iCOM display, compressors, reheat, humidifier, evaporator fans and evaporator coil and electronic expansion valves.
Operation 3.8 CANbus Connections Between the Liebert DSE, Liebert EconoPhase™ and Liebert MC™ Communication between the Liebert DSE, Liebert EconoPhase and Liebert MC condenser is achieved using a terminal screw CANbus connection. CANbus (Controller Area Network bus) communication to each device is wired as a daisy chain using a shielded, twisted pair cable. The guidelines below must be followed to ensure reliable communication.
Operation Figure 40 CANbus connections TB50 TB49 Liebert EconoPhase Circuit 1 On 1 J6 1 2 3 4 5 6 7 8 3 TB50 TB50 Liebert EconoPhase Circuit 2 CAN On 1 J6 3 1 2 3 4 5 6 7 8 CAN TB49 TB49 Factory-Installed CANbus Cable Field-Installed CANbus Cable TB50 TB49 Liebert EconoPhase CANbus Terminal Block Liebert MC Unit Circuit 2 On 1 J6 3 1 2 3 4 5 6 7 8 CAN On TB49 TB50 Indoor Unit With Liebert iCOM TB49 Liebert MC Unit Circuit 1 1 J6 3 1 2 3 4 5 6 7 8 CAN 3.8.
Operation EEV Battery Backup Each electronic expansion valve is equipped with a battery backup to drive the valve closed if power is lost during normal operation. The Liebert iCOM monitors battery life by performing periodic tests using the electronic expansion valve board. If a test fails, the Liebert iCOM will report an EEV1 or 2 BATTERY WARNING or EEV1 or 2 BATTERY FAILURE event. The Liebert iCOM has a counter in Service Menus> Set Alarms.
Operation Low Noise / Fan Reversal Fan reversal interval should be programmed at times when the unit is off (monitoring off, standby or Remote Shut Down (RSD)). Liebert iCOM (apart from the configuration and status screens) has to perform two timer activities: • Low noise during programmed days / time (common for dual Liebert MC boards). • Fan reversal in a specified frequency (allows separate settings for dual Liebert MC boards).
Operation U816 Reversal Duration—Selection defines the length of time the fan(s) will be operated in reverse. This parameter is adjustable from 0-999 seconds. The default set value is 60 seconds. U817 Reverse Fans Now—Selection performs a rotation when parameter is set to “YES.” When selection is set to “YES,” the parameter will automatically change back to “NO” when the timer, U816, has elapsed.
Operation When the Liebert DSE is operating in EconoPhase Mode, the Liebert iCOM display will provide a unit level display that shows the status of the refrigeration circuit. Other system and unit level screens can be accessed through the Liebert iCOM.
Operation The parameters below can be found in the Liebert iCOM under User > Econophase.
Operation 3.8.
Operation 3.9 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 12. If an event has a safety function (high pressure, low pressure, main fan overload, etc.
Operation Table 12 Possible event settings—events listed may vary by specific unit and options order 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
Operation Table 12 Possible event settings—events listed may vary by specific unit and options order 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 secon
Operation Table 13 Alarms specific to Liebert MC condenser Event Description GC 1 or 2 Disconnected The Liebert iCOM board cannot establish communication with the Liebert MC Board for 10 seconds consecutively, the “GCx Disconnected” alarm will be annunciated for the corresponding circuit. No further action is taken by the Liebert iCOM. Once the Liebert iCOM re-establishes communication with the Liebert MC board, the event will be reset.
Operation Table 14 Liebert EconoPhase events and alarm notifications on Liebert DSE models Event Description PB1 BOARD FAIL An unrecoverable fatal system error has occurred. Pump shut down. Pump board must be rebooted to reset event. PB1 CAVITATE SHUTDOWN Pump has cavitated and was shut down. Event is reset when the Liebert iCOM requests a new startup. PB1 IN PRES SENS FAIL Inlet refrigerant pressure sensor failure. Pump shut down. Event is reset when condition clears.
Operation Table 15 3.9.1 Alarms specific to the EEV Event Description EEV 1 or 2 Communication Error This event is triggered if the iCOM control looses communication with the EEV board. The compressor(s) will shut off and the unit will exit EconoPhase while the error is active. EEV 1 or 2 Sensor Error This event is triggered if the iCOM control looses communication with one of the connected EEV sensors.
Operation Table 16 Customer inputs Setting Reaction Smoke Event Only Water Alarm Event Only C PMP Alarm Event Only Flow Alarm Event Only Stdby G Pmp Event Only Stdby Unit Event Only C-Input 1 Event Only C-Input 2 Event Only C-Input 3 Event Only C-Input 4 Event Only Rht Lockout Event + Electrical Heaters Disabled Hum Lockout Event + Humidifier Disabled Rht+Hum Lock Event + Electrical Heaters and Humidifier Disabled Comp Lockout Event + Compressor(s) Disabled w/o Pump Down Cal
Operation 3.9.3 Analog Inputs The Liebert iCOM allows an external sensor or analog device to be connected, scaled and viewed. See Table 17 for output availability by unit type. 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. The option provides the electrical connection from the Liebert iCOM control board to the cooling unit’s field-wiring connection area.
Operation 3.9.4 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 3.9.5 Possible Event Notifications Table 20 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 Table 21 Alarms specific to Liebert DSE compressor Tandem Specific Alarms Description COMP 1A OVERLOAD COMP 1B OVERLOAD COMP 2A OVERLOAD The compressor has entered an overload condition and has been deactivated. COMP 2B OVERLOAD COMP 1A HRS EXCEEDED COMP 1B HRS EXCEEDED COMP 2A HRS EXCEEDED The run hour limit has been exceeded by the actual run hours of the compressor.
Operation 3.10 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. 3.10.
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. • No Teamwork: Multiple zones in one room • Teamwork Mode 2: Unbalanced load (large rooms, not all units will have the same load) (work well for most applications) • Teamwork Mode 3: Allows the cooling capacity (Supply Sensor) to operate as a local control by removing only the amount of load required to maintain the discharge air temperature at each unit.
Teamwork 4.2.4 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 49 Remote sensors Figure 50 Sensor positioning Supply (Discharge) Temperature Sensor Inlet Rack Temperature Sensors (sensors in each row) Liebert® iCOM® for Liebert DSE™ 74
Teamwork 4.2.5 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 rack sensor must be given a unique address on the CANbus cable run to the associated Liebert CW™ unit. DIP switches are used to give the 2T sensor its unique address.
Teamwork Figure 54 Setting 2T Sensor DIP Switches 2T sensor housing DIP switch hole Non-conductive DIP switch tool 2T sensor housing case opened NOTE Use included DIP switch tool (or similar tool). DO NOT insert any metal object into the sensor case. 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 55.
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 Follow these guidelines when routing CANbus cable to ensure reliable communication. • Use approved hangers, such as telephone wire/RG-6 coaxial wired hangers; do not secure cables with any method that might damage them. • Limit bends to less than four times the diameter of the cable. • Avoid deforming cables when securing in bundles and when hanging them. • Keep cables away from devices that may introduce interference, such as high-voltage wires, machines, fluorescent lights, and electronics.
Teamwork 4.3.6 Install Grounding Ring Connector in Electrical Panel ! WARNING Risk of arc flash and electrical shock. Open all local and remote electric power disconnect switches and wear appropriate personal protection equipment per NFPA 70E and verify with a voltmeter that power is Off before working within the electric control enclosure. Failure to comply can cause injury and death.
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, 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 4.3.8 Standby—Rotation Typical Standby (Lead/Lag) Function This function can be performed in any teamwork mode, including NO Teamwork. One or more units can be defined to be Standby; the normal status of standby units is Standby Off (fan off). In case one regular unit has an alarm that is defined (to be defined in the alarm configuration), to switch on a standby unit, the faulty unit will switch off and the standby unit will switch On.
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 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.
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 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.
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 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 65 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°C to 27°C). The default setting 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 66 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 U206 Low Return Humidity—Allows a user to adjust the point at which the actual return humidity activates a Low Humidity Alarm. This parameter is adjustable from 1% to 99%. The default setting is 40%F. U207 Sensor A Alarms—Enables or disables the alarms for reference Sensor A. When enabled, the Sensor A temperature and humidity values will be compared to a high and low setting.
User Menu Parameters Figure 70 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 71 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 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 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 75 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 138 through 142 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. 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. U404 Temperature Indication—Selects the actual and set point temperature indication.
User Menu Parameters 7.6 User-Total Run Hours Menu Screens Total Run Hours displays the cumulative hours a particular component has been operating and the limit placed on the hours the component may operate. Each main component of the unit has its own run hours counter and a threshold. The actual run hours can be reset to 0 by selecting the counter by pressing Enter, and then pressing the Down arrow key. The thresholds can be set the same way.
User Menu Parameters 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). These values are available: • NO: The user can use this setting to temporary interrupt a sleep mode interval while sleep mode is active. If the parameter is left at No, sleep mode will not resume until the next sleep mode interval occurs or the user sets the parameter back to Yes or Auto.
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 79 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 80 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.
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 81 Service Menu Main Screen 8.
Service Menu Parameters 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 default setting is Return. S103 Temperature Setpoint Act/Set—Selects a return temperature that the cooling unit will maintain by applying cooling and or reheats. This is adjustable from 41-104°F (5-40°C). The default is 73°F (22.7°C). There are two values in this field.
Service Menu Parameters Figure 83 Setpoints screen, page 2 of 9 S113 Enable Temp Compensation—Temperature compensation allows for a second or third sensor to be used that will influence the unit’s cooling or heating. Three selectable values are available: Return, Supply, and Ret + Sup (Return plus Supply). See 3.6 - Supply Control for more information. S114 Return Compensation Setpoint—The temperature setpoint where compensation begins to operate by increasing the supply air setpoint.
Service Menu Parameters Figure 84 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 S132 Dehum Reheat/LL Sensor/Set—Sets the sensor and temperature start point that the reheat will be deactivated and dehumidification will be stopped due to overcooling the space in a call for dehumidification. S133 Dehum Low Limit 1 LL1/LL2—Dehum Low Limit 1; Dehum Low Limit 2. S134 Dehum Reheat Prop Band2—Sets the reheat proportional band for reheat operation independently of the temperature proportional band.
Service Menu Parameters S141 Lockout FC at FC Fluid below—Prevents frost from building up on the free-cooling pipes when the outdoor ambient is extremely low by turning Off the free-cooling circuit when the water temperature is too low. Figure 86 Setpoints screen, page 5 of 9 S146 Fan Control Sensor—Controls the fan speed for modulation. Options for this setting are Supply, Return, Remote, and Manual Mode.
Service Menu Parameters S153 Fanspeed Dehum/No Power—Sets the fan speed when a call for dehumidification is active. This allows the units fan speed to be ramped lower to help with any overcooling due to the dehumidification process. This also allows the coil to remove additional moisture even faster. S154 Allow Fan Modulation on Comp—Provides the option to set the fan to fixed speed if the unit is equipped with compressors. Two options are available: No and Yes (default).
Service Menu Parameters S160 Fanspeed Reposition Mode/Delay Decel/—This parameter should only be adjusted by a factory service trained technician. The fan speed reposition mode / delay is a one time delay as the fan speed is requested to change direction. This delay will be applied only when the fan speed is commanded from an increasing to decreasing state or a decreasing to increasing state. This allows the fan to hold its current position while the temperature stabilizes.
Service Menu Parameters Figure 88 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. To do so, press 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 Figure 90 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 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 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.
Service Menu Parameters S508 Cascade Units—Allows units to activate in Standby mode if the room temperature cannot be maintained by the non-standby 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 TW3 only). S509 Cascaded Units Delay—Sets the delay time to stage on each unit as they are staged on during increased demand.
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 3.10.1 - Calculating Next Maintenance and Diagnostics for additional details on these menu screens.
Service Menu Parameters Figure 93 Wellness—Motor settings screen, page 2 of 9 Figure 94 Wellness—Compressor 1 settings screen, page 3 of 9 Liebert® iCOM® for Liebert DSE™ 120
Service Menu Parameters Figure 95 Wellness—Compressor 2 settings screen, page 4 of 9 Figure 96 Wellness—Electric heater 1 settings screen, page 5 of 9 121 Liebert® iCOM® for Liebert DSE™
Service Menu Parameters Figure 97 Wellness—Electric heater 2 settings screen, page 6 of 9 Figure 98 Wellness—Electric heater 3 settings screen, page 7 of 9 Liebert® iCOM® for Liebert DSE™ 122
Service Menu Parameters Figure 99 Wellness—Humidifier settings screen, page 8 of 9 Figure 100 Wellness—Economizer settings screen, page 9 of 9 123 Liebert® iCOM® for Liebert DSE™
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. The Liebert iCOM Service Diagnostics menu has been updated to reflect the Tandem Digital Compressor Set.
Service Menu Parameters S31B Low Diff Lockout C1 / C2—Resets a Low Diff C(#= 1 or 2) Lockout. The status is No. If a when a lockout is present, the value changes to Yes. Figure 102 Diagnostics/service mode screen, page 2 of 8 Standard Compressor Screen Tandem Compressor Screen The information in the Diagnostics > Service Mode, page 2 of 8, will vary according to the compressor type installed. S313 Manual Mode—Places the Liebert iCOM in manual mode.
Service Menu Parameters S317 Compressor 1 Capacity—Standard compressor models. Selects the capacity the compressor should run at. The range is 20 to 100%. S317 Compressor 1A Capacity—Tandem compressor models. Selects the capacity the compressor should run at. The range is 20 to 100%. S318 Compressor 1 Cycle Ramp—Standard compressor models. Enables Compressor 1 Cycle Ramp. S318 Compressor 1A Cycle Ramp—Tandem compressor models. Enables Compressor 1A Cycle Ramp.
Service Menu Parameters Figure 103 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 104 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 105 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 106 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 109 Set alarms screen, page 1 of 12 S202 Return Sensor Alarms—Enables and disables the return temperature and humidity sensor alarms. Default is Enabled. S203 High Return Temperature—Sets the threshold temperature when a return high temperature alarm will occur.
Service Menu Parameters Figure 110 Set alarms screen, page 2 of 12 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 111 Set alarms screen, page 3 of 12 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 12 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 112 Set alarms screen, page 4 of 12 Figure 113 Set alarms screen, page 5 of 12 135 Liebert® iCOM® for Liebert DSE™
Service Menu Parameters Figure 114 Set alarms screen, page 6 of 12 Figure 115 Set alarms screen, page 7 of 12 Liebert® iCOM® for Liebert DSE™ 136
Service Menu Parameters Figure 116 Set alarms screen, page 8 of 12 Figure 117 Set alarms screen, page 9 of 12 137 Liebert® iCOM® for Liebert DSE™
Service Menu Parameters Figure 118 Set alarms screen, page 10 of 12 Figure 119 Set alarms screen, page 11 of 12 Liebert® iCOM® for Liebert DSE™ 138
Service Menu Parameters Figure 120 8.6 Set alarms screen, page 12 of 12 Service-iCOM-DO Setup Menu Screens The iCOM-DO Setup menu is used to configure the Liebert iCOM-DO. Figure 121 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 122 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.
Service Menu Parameters Figure 125 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—Options are “TH” (Temperature/Humidity) and 2T (two temperature); depends on type of sensor installed.
Service Menu Parameters S628 Supply/Return Sensor—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 Sensor—Shows the adjusted temperature value of the supply sensor. This value is the actual sensor reading (+ or -) the offset “Supply Sensor”.
Service Menu Parameters Figure 128 Sensor calibration/setup screen, page 5 of 7 Figure 129 Sensor calibration/setup screen, page 6 of 7 S657 DP Transducer is Connected to—Sets the analog input 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 default is none. S658 DP Transducer is Setup in—Sets the unit of measure that will be used for the differential pressure transducer.
Service Menu Parameters 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. S666 DP Transducer High—Shows the status of the high differential pressure transducer in both inWC and Pa after it's setup at S660. S667 Actual DP Signal—Shows the actual differential pressure transducer percentage.
Service Menu Parameters 8.8 Service-Economizer Menu Screens Economizer provides advanced air side Economizer monitoring and parameter adjustment Figure 131 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 Figure 132 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. SA15 Outdoor Sensor C Connected—The default selection for units without air economizer is No. The default selection for unit with air economizer is Yes.
Service Menu Parameters Figure 133 Economizer, page 3 of 3 SA24 - Return Damper Open—Sets the open voltage. This parameter may be set from 0V to 10.0V. The default is 2.0V. SA25 - Return Damper Closed—Sets the closed voltage. This parameter may be set from 0V to 10.0V. The 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 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 134 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 135 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 136 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 137 System/network setup screen—Unit, page 2 of 2 S835 Monitoring Protocol—Selects the monitoring protocol. Velocity V4 is the default that will provide communication to the Liebert IntelliSlot® housing. 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. S837 Netmask—Netmask is used to divide IP addresses in subnet and specify the network available to hosts.
Service Menu Parameters 8.11 Service-Options Setup Menu Screens Options Setup contains component configuration, such as enable/disable humidifier, reheat, etc. Figure 138 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 Figure 139 Options setup, page 2 of 6 S413 Humidification Enabled—Enables or disables humidification. S414 Infrared Flush Rate—Shows the amount of makeup water supplied to an infrared humidifier as a percentage of the humidifier capacity. This value can be set from 110-500% (default is 150%). Higher flush rates reduce mineral deposit buildup in the humidifier pan.
Service Menu Parameters Figure 140 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 141 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 142 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 143 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 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 144 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.
Service Menu Parameters Notes 161 Liebert® iCOM® for Liebert DSE™
Service Menu Parameters Liebert® iCOM® for Liebert DSE™ 162
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