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Operation

Liebert

®

iCOM

®

for Liebert DSE

™

32

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.
The Reheat Proportional Band is divided into three equal parts, each representing one reheat stage.

As the Temperature Proportional Band increases the call for heating from 0% to -100%, stages 1

through 3 are switched On, as shown in

. Your unit will have one of the nine reheat

configuration types shown in

Figure 26 Three-stage heating

Additional Reheat Rules

The reheat activation rules in the preceding section may be altered, depending on which reheat mode

is selected on line A144:

• None: No reheats will ever be activated for dehumidification.
• Staged: The reheat rules in the preceding section will apply.
• When a parameter on line DH07 (Reheat Stage to Deactivate C1B / C2B) is set to None, its

corresponding compressor will not be deactivated when reheats turn On.

Table 7

Reheat configuration types

Type

A

B

C

G

H

I

Stage 1

Electric 1

Electric 1

Electric 1

Hot Water

Hot Water

Hot Water

Stage 2

-

Electric 2

Electric 2

-

Electric 1

Electric 1

Stage 3

-

-

Electric 3

-

-

Electric 2

NOTE

Hot water is not influenced by the setting of electric reheat during dehumidification.

0%

Heating

65

70

Heat 3

On

½ Dead-

band

66

67

68

69

Heat 2

On

Heat 1

On

Heat 3

Off

Heat 2

Off

Heat 1

Off

-100 %

Heating

½ Proportional Band

Decreasing Temperature

Temp Setpoint: 70°F
Proportional Band: 8°F
Deadband: 2°F

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Summary of Contents for Liebert iCOM

Page 1: ...Liebert iCOM for Liebert DSE User Manual Intelligent Communications Monitoring for Liebert DSE with Software Version PA2 03 33R ...

Page 2: ......

Page 3: ...ng Up PI Control 28 3 2 2 Compressor Control 28 3 3 Tandem Compressors 30 3 3 1 Tandem Digital Scroll Assignment 30 3 3 2 Tandem Digital Compressor Annunciation Criteria and Unit Behavior 31 3 3 3 Tandem Operation 31 3 4 Temperature Control Reheat 31 3 4 1 Electric Hot Gas and Hot Water Reheat 32 3 5 Humidity Control 33 3 5 1 Humidity Control Types 34 3 5 2 Humidification 35 3 5 3 Dehumidification...

Page 4: ...l 2T Sensors on Racks to be Monitored 78 4 3 5 Replace CANbus Cable Between Liebert iCOM Display and Liebert iCOM Main Board with Grounded CANbus Cable 79 4 3 6 Install Grounding Ring Connector in Electrical Panel 80 4 3 7 Software Setup 81 4 3 8 Standby Rotation 82 5 0 INSTALLING A LIEBERT ICOM UNIT TO UNIT NETWORK 83 5 1 Placement of Cooling Units 83 5 1 1 Balancing Operating and Standby Units 8...

Page 5: ...stem view to unit view to rack view to EconoPhase view single unit 9 Figure 10 Navigation from system view to unit view to rack view to EconoPhase view U2U network 10 Figure 11 Entering a password 12 Figure 12 Menu tree Stand alone 13 Figure 13 Menu tree Large display networked 14 Figure 14 User menu icons and descriptions 15 Figure 15 Service menu icons and descriptions 17 Figure 16 Start stop pr...

Page 6: ...ensors 75 Figure 53 DIP switches in 2T sensors 76 Figure 54 Setting 2T Sensor DIP Switches 77 Figure 55 2T sensor arrangement and termination 77 Figure 56 Termination jumper setting 78 Figure 57 Connect CANbus cable 79 Figure 58 Install grounding ring connector 80 Figure 59 Standby unit layout example 10 cooling units in room 83 Figure 60 U2U network setup diagram 86 Figure 61 Wiring a large displ...

Page 7: ...ervice mode screen page 4 of 8 128 Figure 105 Diagnostics service mode screen page 5 of 8 129 Figure 106 Diagnostics service mode screen page 6 of 8 130 Figure 107 Diagnostics service mode screen page 7 of 8 130 Figure 108 Diagnostics service mode screen page 8 of 8 131 Figure 109 Set alarms screen page 1 of 12 132 Figure 110 Set alarms screen page 2 of 12 133 Figure 111 Set alarms screen page 3 o...

Page 8: ...e 5 Controlling sensor settings 21 Table 6 PI control troubleshooting 28 Table 7 Reheat configuration types 32 Table 8 Parameters for infrared humidifier control 35 Table 9 Dehumidification With Comp settings 38 Table 10 EEV control values default and special settings 50 Table 11 Liebert EconoPhase operation states 55 Table 12 Possible event settings events listed may vary by specific unit and opt...

Page 9: ...es Large The Liebert DSE is available with either a large Liebert iCOM which has a 320 x 240 dot matrix screen The display shows up to 16 menu icons at a time as well as descriptive text This display can be used to control a single cooling unit or any cooling unit on a network regardless of how it is connected either integrated into a cooling unit or simply connected to the network and mounted rem...

Page 10: ...ntrol other units on the network when they are in the same group When turning a unit Off or On with the large display make sure that the unit to be shut down or started up is shown on the screen If the system screen is shown and the On Off key is pressed the Liebert iCOM shows a notification that pressing the On Off key again will turn off all units on the network NOTE The Help key may be pressed ...

Page 11: ...e Key Up Arrow Moves upward in a menu or increases the value of a selected parameter Decrease Key Down Arrow Moves downward in a menu or reduces the value of a selected parameter Left and Right Arrow Keys Navigates through text and sections of the display Upper LED Blinking Red Active unacknowledged alarm exists Solid Red Active acknowledged alarm exists Lower LED Amber Power is available to the u...

Page 12: ...en with rack view of sensors Unit Screen Unit Screen with rack view of sensors Unit Screen with EconoPhase View 2 1 1 System Screen System Screen will indicate whether Teamwork is turned On and which teamwork mode is currently set within the control This system screen displays the unit operation by displaying the average of all active components from each connected to the unit two unit U2U network...

Page 13: ...supply return and remote sensors This system screen display is calculated using information from the connected units in the unit two unit U2U network If the unit is stand along the information displayed will represent values only from that unit Figure 5 System screen with rack view of sensors NOTE The graphical system screen is shown above The System screen type may be programmed differently based...

Page 14: ... 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 The unit screen type may be programmed differently based on user preference See Liebert iCOM Display Readout on page 10 for more informatio...

Page 15: ...her dew point or relative humidity depending on humidity control type Each unit can display individual remote rack sensors The reading will be either an average or maximum reading between the two sensors connected at each 2T sensor module The bar graph s upper limit is set at 77 F 25 C The lower limit is set at 68 F 20 C the rack inlet temperature range recommended by ASHRAE When a rack temperatur...

Page 16: ...ns cold ambient Outdoor Temp Too High Outside Temperature too high for PRE pump operation Unit Is Off Unit is OFF no cooling heating etc Transitioning to PRE Mode Transition to PRE waiting for the compressor to stop Pump Failure Permanent pump failure Not Configured for Operation The Pump has not been enabled Sensor Reading s Invalid Liebert Microchannel ambient or iCOM control supply remote or re...

Page 17: ...wed If the cooling unit is not on a network the Status menu will display only that cooling unit s information Any display that is connected to a network can be used to view any cooling unit on the network or show an average view of the entire system of cooling units 2 2 2 Accessing Submenus While the display is at unit status screen press either the Enter or down arrow key to display the User menu...

Page 18: ...ut The Liebert iCOM supports multiple unit and system screen layouts These screen layouts are configured on line U408 of the user menus Display Setup icon U408 Screen selections include Simple factory default Graphical Simple comma Graphical comma The graphical settings allow the user to view a graphical representation of the iCOM operations The simple setting shows the operating status only of co...

Page 19: ...esired icon highlighted press the Enter key to enter that submenu Once in a submenu a list of parameters will be displayed The up and down arrow keys may be used to scroll through the parameters page by page if the submenu has multiple pages To scroll item by item press the Enter key and then use the up and down arrow keys Using the right or left arrow keys on large displays attached to a network ...

Page 20: ...tains the parameter to be changed 2 Select Password in the submenu by pressing the Enter key 3 Press the Enter key to move your cursor to the right side of the screen to select the question marks 4 Use the arrow keys to enter the numeral for the password s first digit the up arrow key moves from 1 to the next digit 5 Use the right arrow key to move to the next question mark and repeat Step 4 to en...

Page 21: ...Unit Password Setpoints Unit Diary Standby Settings Lead Lag Maintenance Wellness Settings Diagnostics Service Mode Set Alarms iCOM DO Sensor Calibration Setup Economizer System Network Setup Options Setup Service Contact Info Remote Sensors Advanced Menu Unit Password Factory Settings EconoPhase Settings Expert Settings Compressor Info Tandem Info MBV Settings Change Passwords Runtime Monitoring ...

Page 22: ...ey Figure 13 Menu tree Large display networked Status Menu System View Networked Large Display Only User Menu Unit Password Setpoints Spare Part List Event Log Graphics View Network Set Alarms Sensor Data Active Alarms Display Setup Total Run Hours Sleep Mode Service Contact Info Condenser Timer Service Menu Unit Password Setpoints Unit Diary Standby Settings Lead Lag Maintenance Wellness Settings...

Page 23: ...ts in the cooling unit Event Log Contains last 400 events Graphics Displays temperature and humidity graphs View Network Shows status of all connected units Set Alarms Allows enable disable and settings for alarms Sensor Data Shows readings of standard and optional sensors Active Alarms Allows the user to view all current active alarms Display Setup Change settings for display language time simple...

Page 24: ...ting 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 Table 3 User menu icons continued Icon Name Description 1234h 1 2 3 9 6 ...

Page 25: ...e units are connected Maintenance Wellness Settings Allows setting maintenance interval reminder maintenance message number of unit starts and stops and time since last maintenance Diagnostics Service Mode Allows troubleshooting manual mode read analog and digital inputs Set Alarms Allows enable disable and settings for alarms Sensor Calibration Setup Allows calibration of sensors System Network S...

Page 26: ...ntact 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 Table 4 Service menu icons continued Icon Name Description DO REM SENSORS ...

Page 27: ... Screen of a large display Display OFF is shown for unit status ALARM STANDBY The unit has been rotated into standby because an active alarm on the unit is present STANDBY The unit is in standby based on the Lead Lag settings in the Service Menu TIMER OFF The unit has been set to Sleep and is waiting for the next start interval See User Sleep Mode Menu UNIT ON The unit is operating normally withou...

Page 28: ...an adjustable time delay an audible alarm occurs an alarm relay activates and an event is recorded in the event log Main Fan Overload or EC Fan Fault and Loss of Airflow in Service Menu Set Alarms The fan delay at the unit start is always five seconds shorter than the control delay to avoid short cycling components when the fan is not working When a main fan overload occurs the main fan cooling he...

Page 29: ...e S164 Allow BMS to change Fanspeed must be changed to YES at the Liebert iCOM Both parameters are found in Service Menus Service Setpoints Figure 17 Setting manual fan control and changing the setpoint Fan speed may be written through the building management system to line S152 The user can change this locally However if the speed is set by the BMS it will override the local setting Supply Return...

Page 30: ...rates are proportionally increased The fan speed reposition delay timer setting in the Liebert iCOM menu may be changed to improve the fan operation stability if it is oscillating The delay timer holds back the fan output change until each delay period is reached if fan speed is decreasing If fan speed is increasing then the delay timer has no effect 3 1 2 Back Draft Fan Damper The Liebert iCOM co...

Page 31: ...s of the low pressure device The low pressure device input is ignored if the compressor is not operating Advanced DX Freeze Protection Applying fan speed to direct expansion systems generates the issue of how to avoid freezing condensate on the coil when the unit operates below 100 fan speed Liebert iCOM s advanced freeze protection provides the ability to predict freeze conditions and correct thi...

Page 32: ... 8 Setting the counter to 0 will auto reset the alarm without the need of pressing the reset button on the display Even if the pressure in the system drops below the alarm point the compressor will remain Off until the system is reset Advanced DX High Pressure Protection The goal of the advanced high pressure protection routines are to prevent a high pressure lockout from occurring The Liebert iCO...

Page 33: ...nks will be reversed 3 1 5 Compressor Timing Short Cycle Protection To help maximize the life of your compressor s there is a start to next start delay for each single compressor 3 1 6 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 Alw...

Page 34: ...setpoint Figure 21 Temperature proportional band The Temperature Setpoint is between these two equal parts As the air temperature rises above the temperature setpoint the percent cooling required increases proportionally from 0 to 100 over half the programmable temperature proportional band The percent heating requirement 0 to 100 is determined the same way when the air temperature falls below the...

Page 35: ...ntrol will not function satisfactorily in some applications as shown in this example because the room temperature would increase 10 F 5 5 k above the setpoint before cooling is staged to 100 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 The integration I time works with the p...

Page 36: ...n 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 Therefore the capacity of the compressor ...

Page 37: ... compressor is started the solenoid is energized longer than it is de energized to match the call for cooling When the call for cooling increases to 100 the solenoid is de energized for the entire 15 second cycle Figure 23 Single and dual digital scroll compressor activation points Temp Setpoint 70 F Proportional Band 8 F Deadband 2 F Dead band Increasing Temperature Comp 1 Off Proportional Band 7...

Page 38: ... Compressor 2B describe specific compressors within the Liebert iCOM software Tandem Digital Scroll Compressor Set 1 is composed of Compressor 1A and Compressor 1B Compressor 1A is a digital scroll compressor and Compressor 1B is a fixed capacity compressor which will often be referred to simply as a fixed compressor The same rules apply to Tandem Bank 2 The activation and deactivation of compress...

Page 39: ...r each of the tandem specific alarms see Table 21 the following rules dictate their annunciation conditions and control behavior 3 3 3 Tandem Operation If alarms that require lead lag changes are present in both tandem banks then Tandem Bank 1 must be set as the lead bank Once a compressor alarm is reset the affected compressors may be reactivated and the actual tandem activation sequence will be ...

Page 40: ... Table 7 Figure 26 Three stage heating Additional Reheat Rules The reheat activation rules in the preceding section may be altered depending on which reheat mode is selected on line A144 None No reheats will ever be activated for dehumidification Staged The reheat rules in the preceding section will apply When a parameter on line DH07 Reheat Stage to Deactivate C1B C2B is set to None its correspon...

Page 41: ...e humidifier Compensated The actual return air humidity sensor reading is sent to the Temperature and Humidity Control where the Humidity Setpoint is adjusted based on how much the return room air temperature deviates from the desired temperature setpoint The adjusted humidity setpoint is used for humidification percent requirement determination For every 1 C deviation from the temperature setpoin...

Page 42: ...adband Figure 27 Humidity proportional band When the return air humidity deviates from the setpoint either dehumidification or humidification is activated If the return air humidity increases the control calls for 0 none to 100 full dehumidifying capacity based on how far the humidity penetrates the dehumidification portion of the proportional band If the return air humidity decreases the control ...

Page 43: ...en in proportional mode An autoflush system automatically controls a water makeup valve to maintain proper levels in the infrared humidifier water pan during humidifier operation If humidification is needed and 15 hours have elapsed since the last time the humidifier was on then the humidifier is not turned on until the valve completes an initial fill of the humidifier pan This pre fill is about 3...

Page 44: ...ooling During Stage 1 and 2 with one and two compressors running respectively 30kW of reheat is available to offset cooling For rooms with multiple units Emerson recommends performing dehumidification via Teamwork Mode to prevent compressor cycling in case of lightly loaded rooms or having standard Liebert DS units available to perform dehumidification Liebert DSE units in dehumidification mode mi...

Page 45: ...only the right side of the menu is displayed and dew point will display the left side of the menu Dehum Reheat Prop Band 100 Temp 33 33 33 Step 3 Step 2 Step 3 on Step 3 off Step 2 on Step 2 off Step 1 on Step 1 off 0 Dehum Reheat Setpoint 0 Heater Deadband Step 1 Dehum Reheat Prop Band 0 Dehum Reheat Setpoint 100 Temp 33 33 33 Step 3 Step 2 Step 3 on Step 3 off Step 2 on Step 2 off Step 1 on Step...

Page 46: ...e reheats will operate during dehumidification The Dehumidification With Comp field is set when the cooling unit is built and should not be adjusted without first consulting the factory Table 9 outlines which Low Limit settings will be available based on the Dehumidification With Comp selection Low Limit 1 and 2 will be available only on cooling units with two compressors when Dehumidification Wit...

Page 47: ... compressor activation deactivation points may be adjusted but they cannot be adjusted so that the compressor sequence is changed C2B s settings cannot be adjusted so that it will turn On before C1B during dehumidification The only time sequencing will be adjusted is when compressor alarms are present during dehumidification Please consult the corresponding sections below for details on this mode ...

Page 48: ...be turned Off Once this happens control operation moves to DH Stage 2 If the Low Limit Sensor Line S132 temperature becomes less than or equal to the Low Limit 1 border lines S132 S133 the C2B and C1B compressors must be turned Off Once this happens control operation moves to DH Stage 1 Dehumidification with Three Compressors DH Stage 2 Compressors C1A C2A and C2B must be On and C1B must be Off Th...

Page 49: ...or line S132 temperature is greater than or equal to the Low Limit 2 reset border dehumidification will start with two compressors DH Stage 1 When Dehum Reheat LL Sensor Set line S132 Supply Sensor If the CFC is greater than or equal to the setting on DH04 C1A C2A Restart CFC dehumidification will start with two compressors DH Stage 1 If the conditions based on the settings on line S132 Dehum Rehe...

Page 50: ...Out on Alarm When two of the four compressors are out on alarm operation for all compressor combinations become similar and will be guided by the rules listed below Both available compressors must be turned On and will operate like compressors C1A and C2A in DH Stage 1 If Compressor 1A is operational it will always be loaded at 100 If Compressor 2A is operational it will adjust its loading based o...

Page 51: ...to maintain a minimum air temperature under a raised floor to help prevent condensation To avoid supply temperatures that are too low the Supply Limit can influence the opening of three point or analog actuators or compressor capacity The control compares the deviation from the return air setpoint and the supply limit setpoint and calculates the output to the actuator from the smaller deviation Wh...

Page 52: ...inks between the cold aisle temperatures cooling capacity and air flow Changes that could invoke temperature compensation would be the removal of floor tiles in non cold aisle areas incorrect supply temperature setpoint unit failure in another zone or heat load changes greater than expected heat load changes in rack equipment As a further protection the temperature compensation routine also ties i...

Page 53: ...33 Return Compensation control band Return Compensation in Unit View 100 S115 Return Compensation Band S114 Return Compensation Setpoint S115 Return Compensation Value Temperature Setpoint Sensor set to either Supply Sensor or Remote Sensor New air temperature setpoint modified by compensation ...

Page 54: ...34 Return Compensation setpoint deviation Supply Compensation Supply temperature compensation allows units to automatically adjust the supply air temperature setpoint when the unit has reached its maximum airflow of 100 and the cold aisle temperature remains above the cold aisle setpoint In this situation the temperature compensation feature will proportionally decrease the supply air setpoint unt...

Page 55: ...band of 10ºF 0ºF deadband the fan speed is 100 when the rack temperature is 75ºF If S116 Supply Compensation value 10ºF the supply air temperature will lower one degree for every degree the rack temperature increases outside the fan control band This means if the air temperature setpoint is 65ºF and the rack temperature increase to 77ºF the supply air temperature will lower to 63ºF Return Supply C...

Page 56: ...ices are connected by a CANbus Controller Area Network connection which is described in more detail in 3 8 CANbus Connections Between the Liebert DSE Liebert EconoPhase and Liebert MC Figure 38 Basic Control System Overview Figure 39 Primary control operation overview Pump Discharge Valve Liebert DSE With Liebert iCOM User Entered Air Temperature Setpoint Setpoint Manipulated Variable Pump Speed C...

Page 57: ...f the cable Do not deform cables when securing them in bundles or when hanging them Avoid running the CANbus cables by devices that might introduce noise such as machines fluorescent lights and electronics Avoid stretching cables Separate CANbus wires from high voltage wires and other high voltage sources by 12 inches 305mm A CANbus cable must be connected from the Liebert DSE at the designated te...

Page 58: ... on suction pressure and temperature The EEV control will drive the valve to maintain the superheat setpoint set in the Liebert iCOM using a Proportional Integral Derivative PID routine The PID control values are set at the factory for most applications These default PID values will allow stable superheat control of the unit For DA080 085 the default PID values must be updated to special PID value...

Page 59: ...URE event will occur and the circuit will be locked out See Table 10 for other EEV related alarms and descriptions 3 8 4 Liebert MC with Premium Efficiency Control Overview One or two Liebert MC condensers equipped with the Premium Efficiency Control option can be connected to the Liebert iCOM using CANbus See 3 8 CANbus Connections Between the Liebert DSE Liebert EconoPhase and Liebert MC for mor...

Page 60: ...e available for 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 an interval time is set below U806 Interval From Selects the time of day that the low noise feature will be enabled between 00 00 and 24 00 U807 Operating Mode 0 LN 100 HE The first value represents the fan speed during low noise operation The...

Page 61: ...ation The settings above result in a 35 maximum speed when the timer is active i e at night and will operate the fan between 0 and 100 maximum speed of when the timer is inactive normal operation during daytime 3 8 6 Liebert EconoPhase The Liebert EconoPhase is a option that can be added to the Liebert DSE The Liebert EconoPhase is a pumped refrigerant circuit that bypasses the Liebert DSE s compr...

Page 62: ...ation circuit Other system and unit level screens can be accessed through the Liebert iCOM Figure 42 Liebert EconoPhase main screen Figure 43 Compressorized operation flow path Figure 44 Pump operation flow path Actual Return Temperature Pump Status Actual Supply Temperature Status Discharge Refrigerant Temperature Outdoor Air Temperature Suction Refrigerant Temperature Condenser Fan Speed ...

Page 63: ...Accumulative operating hours of the pumps Pump 2 Run Hours Pump 1 Run Hours Threshold Number of operating hours Pump 2 Run Hours Threshold Pump 1 Inlet Refrigerant Temperature Actual return refrigerant temperature from condenser Pump 2 Inlet Refrigerant Temperature Pump 1 Outlet Refrigerant Temperature Actual leaving refrigerant temperature going to Liebert DSE Pump 2 Outlet Refrigerant Temperatur...

Page 64: ...erature as heat load and outdoor conditions change When the Liebert DSE is operating in mixed EconoPhase Mode the outer coil will always be the Liebert EconoPhase circuit and the inner coil will always be the compressor operation circuit EconoPhase operation will be aborted if either of the following conditions occur Communication to the condenser or pump control board is lost Indoor room temperat...

Page 65: ...ssue has been corrected reset internally by the control or reset manually by the user For instance alarms such as High Pressure can be cleared by changing the alarm counter back to 0 If this event occurs an alarm will be generated and entered into the event log An alarm does not necessarily switch Off the whole cooling unit it depends on which alarm occurs If a standby unit is set any alarm will s...

Page 66: ...IGH PRESSURE Internal Calc no ALM COMP 2 HIGH PRESSURE Internal Calc no ALM COMP 1 LOW PRESSURE Internal Calc no ALM COMP 2 LOW PRESSURE Internal Calc no ALM COMP 1 PUMPDOWN FAIL Internal Calc no ALM COMP 2 PUMPDOWN FAIL Internal Calc no ALM DIG SCROLL1 HIGH TEMP Internal Calc no ALM DIG SCROLL2 HIGH TEMP Internal Calc no ALM EL HEAT HIGH TEMP 5 Sec 0 sec 0 9999 WRN WORKING HRS EXCEEDED 0 Sec 0 se...

Page 67: ...econds 0 9999 WRN HI DEW POINT SENSOR A 0 30 seconds 0 9999 WRN LOW DEW POINT SENSOR A 0 30 seconds 0 9999 WRN HIGH REMOTE SENSOR 0 30 seconds 0 9999 WRN POWER A FAILURE 0 10 seconds 0 9999 ALM POWER B FAILURE 0 10 seconds 0 9999 ALM AIRFLOW SENSOR FAILURE 0 10 seconds 0 9999 WRN HUM CTRL SENSOR FAIL 0 30 seconds 0 9999 WRN LOSS OF FLOW 0 5 seconds 0 9999 ALM STAT PRES SENSOR FAIL 0 120 seconds 0 ...

Page 68: ...rror has occurred causing a condenser shutdown GC Pres Sens Fail C1 or C2 Condenser pressure sensor failure GC High Cond Press C1 or C2 High condensing pressure GC Low Cond Press C1 or C2 Low condensing pressure GC 1 or 2 Amb Sens Fail Ambient temperature sensor failure GC 1 or 2 Amb Temp Limit High low ambient temperature GC Temp Sens Fail C1 or C2 Refrigerant liquid line temperature sensor failu...

Page 69: ...TE SHUTDOWN Pump has cavitated and was shut down Event is reset when the Liebert iCOM requests a new startup PB2 IN PRES SENS FAIL Inlet refrigerant pressure sensor failure Pump shut down Event is reset when condition clears PB2 IN TEMP SENS FAIL Inlet refrigerant temperature sensor failure Pump shut down Event is reset when condition clears PB2 INV DATA SHUTDOWN Invalid data detected and pump was...

Page 70: ... 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 A sensor failure may be indicated by a loss of sensor input readin...

Page 71: ...Flow AL LC Event Lockout Compressors No Pump Down enabled only if at least one compressor is on auto reset depends on input status Comp Lock PD Event Compressor s Disabled w Pump Down Enable FC Forces Free Cooling to On HTRJ VFD Activates the HEAT REJ VFD ALARM no other function HTRJ TVSS Activates the HEAT REJ TVSS ALARM no other function FIRE ALARM Event Shuts The Unit Down 2ND SETPOINT No Event...

Page 72: ...46 and Table 18 to set the input type based on the sensor output being used The default analog input is 0 5VDC Only properly trained and qualified service technicians should change the analog input type Figure 46 Analog connection control board switch Table 17 Number of analog inputs Unit Type Number of Analog Inputs Liebert DSE Air Cooled DX 2 two used for suction pressure management NOTE This op...

Page 73: ...us The output is active when heating is on 03 Humidifying Status The output is active when humidification is on 04 Dehumidifying Status The output is active when dehumidification is on 05 High Temperature The output is active when high temperature alarm is active 06 High Humidity The output is active when the high humidity alarm is active 07 Low Temperature The output is active when the low temper...

Page 74: ...P 2 HRS EXCEEDED WRN EL HEAT1 HRS EXCEEDED WRN EL HEAT2 HRS EXCEEDED WRN EL HEAT3 HRS EXCEEDED WRN FC HRS EXCEEDED WRN GENERAL ALARM ALM GLYCOL TEMP SENSOR WRN HIGH CW TEMP WRN HUM HRS EXCEEDED WRN HUMIDIFIER PROBLEM HW HG HRS EXCEEDED WRN LOSS OF CW FLOW ALM NETWORK FAILURE WRN ON OFF KEY DISABLED WRN POWER ON MSG POWER OFF MSG ROOM SENSOR FAILURE ALM UNIT DISABLED MSG UNIT HRS EXCEEDED WRN UNIT ...

Page 75: ... been deactivated COMP 1B HIGH TEMP COMP 2A HIGH TEMP COMP 2B HIGH TEMP COMP 1A DISCH SENSOR FAIL The compressor discharge pressure sensor has failed COMP 1B DISCH SENSOR FAIL COMP 2A DISCH SENSOR FAIL COMP 2B DISCH SENSOR FAIL COMP 1A SHORT CYCLE The compressor has exceeded the maximum number of stop starts in the time period allowed COMP 1B SHORT CYCLE COMP 2A SHORT CYCLE COMP 2B SHORT CYCLE CIR...

Page 76: ... calculated Optimum number of starts per hour to be set Maximum number of starts per hour to be set Maximum bonus to enlarge time to next maintenance to be set Maximum penalty to reduce time to next maintenance to be set Calculating Unit Wellness Figure 47 Wellness Basic settings screen page 1 of 9 To confirm that preventive maintenance has been performed 1 Go to line Service Wellness basic settin...

Page 77: ...r name of the service engineer editable Reset puts all counters of all components such as motor compressors heaters and humidifier at zero and starts a new maintenance calculation reset to be done after maintenance Fans Heaters Humidifier Settings and Diagnostics Number of starts and Working hours are counted separately since the last maintenance Total working hours can be read in the standard wor...

Page 78: ... have earlier versions of Liebert iCOM software Liebert iCOM controls with PA2 03 33R software will not communicate with Liebert iCOM controls with PA1 XX XXXSTD software Customers who have Liebert iCOM controls with the PA1 XX XXXSTD software and who need additional Liebert iCOM units can Purchase new units with the previous software installed at the factory Purchase new units with the PA2 01 029...

Page 79: ...unit rotation are possible but cascading is not see Standby and Cascade on page 82 Autoset will not adjust the proportional band in this mode 4 2 3 Teamwork Mode 2 Teamwork Mode 2 is designed to prevent units within a group from working against each other or fighting It is best applied in large rooms with unbalanced heat loads In Teamwork Mode 2 all parameters are shared equal to Mode 1 and Unit 1...

Page 80: ...configuration the example on the right is utilizing Teamwork Mode 3 The units below are assuming that the fan power consumed at each unit is 8 1kW when operating at 100 Figure 48 Teamwork Mode 3 Fixed speed vs variable speed Cascade When data center environments require the cooling equipment to modulate from very low loads to the full design load iCOM can coordinate unit capacity and unit activati...

Page 81: ...sensor modules with each module allowing for two temperature probes for a total of 20 temperature readings per cooling unit Each of the two probes allows for 6 feet of distance between the temperature probe and the module This provides the flexibility to either place both temperature sensor probes at the top of two different racks or to place one sensor probe in the middle of the rack and one at t...

Page 82: ...Teamwork Liebert iCOM for Liebert DSE 74 Figure 49 Remote sensors Figure 50 Sensor positioning Supply Discharge Temperature Sensor Inlet Rack Temperature Sensors sensors in each row ...

Page 83: ...wires leaving the housing with temperature sensors on the end of each wire see Figure 51 Figure 51 2T rack sensor To install the Optimized Aisle Control 2T Sensor Array 1 Set DIP switch settings for 2T sensors 2 Terminate the final sensor on the CANbus link 3 Install 2T sensors on racks to be monitored 4 Install CANbus cable between 2T sensors 5 Replace CANbus cable between the Liebert iCOM displa...

Page 84: ...rrespond to address 1 2 3 and 4 If the DIP switches are not set correctly the control will not operate properly Figure 53 DIP switches in 2T sensors Set 2T Rack 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 include...

Page 85: ...ensors are added to extend the existing sensor network Sensor 4 must be unterminated The additional sensors can be connected The last sensor in the extended network must be terminated NOTE Use included DIP switch tool or similar tool DO NOT insert any metal object into the sensor case Non conductive DIP switch tool 2T sensor housing DIP switch hole 2T sensor housing case opened Liebert iCOM Termin...

Page 86: ...n Racks to be Monitored 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 the rear of the front display and must be terminated to a field insta...

Page 87: ...ins at the RJ12 connection will damage the CAN device Cables may be purchased from your local Emerson distributor Figure 57 Connect CANbus cable 4 3 5 Replace CANbus Cable Between Liebert iCOM Display and Liebert iCOM Main Board with Grounded CANbus Cable The incoming CANbus cable from the first 2T sensor in the daisy chain is landed on the rear of the Liebert iCOM display The factory installed CA...

Page 88: ...propriate 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 Before proceeding with installation read all instructions verify that all the parts are included and check the name microprocessor does not isolate power from the unit even in the Unit Off mode Some inte...

Page 89: ...temperature Average controls fan s based on an average rack temperature The number of sensors to be used to calculate the average is determined to the far right If the number of sensors to be used to calculate the average is less than the number of rack sensors programmed for control the Liebert iCOM will average only the highest sensor readings 4 Set Service Menus Setpoints S103 Temperature Contr...

Page 90: ...or dehumidification 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 Uses fan control deviation to stage on standby unit fans cooling Fans stage serially according to the system fan control band and temperature control is based on the local suppl...

Page 91: ...se factors when planning for installation of cooling units with Liebert iCOM controls heat load in the conditioned space cooling air distribution number of operating units versus number of standby cooling units location of the network switch An Ethernet cable cannot exceed 328 feet 100m 5 1 1 Balancing Operating and Standby Units Assign identification to the units in a manner that balances the ope...

Page 92: ... cables to prevent electromagnetic interference Do not bend cables to less than four times the diameter of the cable Do not deform cables when securing in bundles or when hanging them Keep cables away from devices that can introduce noise into them such as machines fluorescent lights and electronics Avoid stretching Ethernet cables tension when pulling cables should not exceed 25 pounds 11kg Do no...

Page 93: ...ebert iCOM can support up to 64 nodes on one network An input output board large display and large wall mount display are each considered one node Of the 64 nodes that may be connected no more than 32 may be input output boards 32 cooling units The following table illustrates how a network can be configured Network communication can be configured during system startup by a Liebert trained technici...

Page 94: ...ight through cable to Port P64 on the large display Figure 60 U2U network setup diagram NOTE A female to female coupler is factory supplied on some cooling units equipped with a large display NOTE The first three octets of the units IP addresses must match for proper communication In the illustration above these are the matching octets 192 168 254 Network Switch Liebert Cooling Unit with Small Lie...

Page 95: ...the back of the display This will enable control and monitoring capabilities to any cooling unit connected to the network Figure 61 Wiring a large display for U2U network operation Crossover Coupler if provided Ethernet Cable Liebert iCOM I O Board Straight Through Ethernet Cables If coupler is not provided connect one end plug to P64 of large graphics display and the other end to the Liebert iCOM...

Page 96: ...ransmission mode polarity and transmit and receive pins See the Liebert vNSA user manual SL 18840 for more details The number of ports available for connecting Liebert iCOMs varies by model as shown in Table 24 Models with a remote large display attached to the front door utilize one of the available Ethernet ports in the Liebert vNSA Models with two switches utilize two ports to connect the switc...

Page 97: ...al Unit RTU communication protocol for Building Management Systems over a RS 485 serial network also called Modbus RTU RS 485 Modbus TCP Modbus Transmission Control Protocol for Building Management Systems over an Internet or LAN BACnet IP BACnet over Internet Protocol for Building Management Systems over the Internet or a LAN BACnet MSTP BACnet Master Slave Token Passing MSTP communication protoc...

Page 98: ...its each with its own set of control commands In addition the Liebert iCOM firmware is being updated constantly As a result the User menu parameter tables in this manual may differ from the display on your cooling unit Check www liebert com for the latest Liebert iCOM user manual updates Figure 63 User menu icons 7 1 User Setpoints Screens Setpoints allows the user to view change and set the most ...

Page 99: ...y 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 Dew Point allows Liebert iCOM to calcul...

Page 100: ... setpoint that will be activated in the event of a BMS timeout The BMS timer must be configured for this parameter to activate If the unit is operating in Coupled mode located in Service Menus Setpoint S163 then this setpoint will affect the fan control setpoint This temperature may affect fan speed if the control is setup to operate in a coupled mode during normal operation see Table 5 This param...

Page 101: ...nd the lower graph displays humidity data Each graph can be customized by changing the span of time and the range of the sensor readings Each unit has its own temperature and humidity graphs as well as a system graph which displays an average of all connected sensors in the network of units Figure 67 Graphs page 2 Spare Part List Spare Parts The spare parts lists contains a detailed description an...

Page 102: ... the event log reaches 400 events the oldest events are erased as new events are stored View Network View Network The view network screen provides an overview of the Liebert iCOM network and a status of each unit This screen will provide the unique unit name given to the unit If no name is given then only the unit number will be displayed 7 3 User Set Alarms Menu Screens Set Alarms allow the user ...

Page 103: ...sor A humidity activates a Low Humidity Alarm This parameter is adjustable from 1 to 99 The default setting is 40 F Figure 69 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 Temp...

Page 104: ... high alarm is 90 F Figure 71 Set alarms screen page 4 U235 Static Pressure Messages Enables or disables the static pressure alarms U236 High Static Pressure Sets the pressure at which the High Static Pressure Alarm is activated This parameter is adjustable from 0 000 1 405 inWC The default setting is 1 284 inWC U237 Low Static Pressure Sets the pressure at which the Low Static Pressure Alarm This...

Page 105: ...hows the actual setpoints read only for temperature and humidity as well as the values from all standard and optional sensors U302 Optional Sensor A2H Shows the Sensor A 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 Sensor A can only be used as a reference sensor for ...

Page 106: ...ence 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 C then its value will be displayed on this line Liebert iCOM will auto detect what type of sensor is connected Sensor C can only be used as a reference sen...

Page 107: ...3 U325 Remote Sensor 1 2 Displays the actual remote sensor reading for each remote sensor The actual value reported here is dependent on how the sensor is setup If the sensor is set to average then an average of the 2 temperature readings per sensor will be shown If the sensor is set to maximum then the maximum value will be shown U326 Remote Sensor 3 4 Same as Remote Sensor 1 2 U327 Remote Sensor...

Page 108: ...sist of the following devices Air Pressure Pressure Temperature or Percent Active Alarms Active Alarms Permits viewing all current active alarms 7 5 User Display Setup Menu Screen Display Setup is where items such as date time screen type and temperature indication may be set according to user preference Figure 76 Display setup screen U401 Language Sets the language on the display Changing this pa...

Page 109: ...lection of a frequency that is easily detected when an alarm occurs The default setting is 50 U407 Backlite Off After X Hours Controls the length of time that the back light remains active when the display is unused When the buttons on the front display have not been pressed for the time selected in this parameter the back light will turn Off extending the life of the display and saving energy U40...

Page 110: ...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 Figure 77 Total run hours screen 7 7 User Sleep Mode Menu Screen 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 ...

Page 111: ...d before the unit will resume sleep mode U610 Timer Mode Type Defines what will happen when sleep mode is active Two options are available System Off the unit remains Off no fans cooling etc High and low temperature events will not bring the unit out of sleep mode Deadband Provides the user with a selectable deadband range to bring a unit out of sleep mode if the temperature in the space gets too ...

Page 112: ...heduled if U802 is set to YES U804 Whole Days Selects the whole day s low noise operations will be available for the condenser fan When the parameter is set to YES the low noise operation is selected for the whole day When set to NO the low noise will be disabled U805 Interval Days Selects the interval day s low noise operations will be available for the condenser fan When the parameter is set to ...

Page 113: ...rms 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 NOTE If one or both of the compressor s are in operation and or the fan is in a low noise operation the request to reverse the fans will be ignored When the conditions above are met to reverse the fans the control will perform a reversal U818 M...

Page 114: ...oling unit s display Please check www liebert com for the latest Liebert iCOM User manual updates Figure 81 Service Menu Main Screen 8 1 Service Setpoints Menu Screens Setpoints allow the user to view change and set all temperature and humidity related parameters Figure 82 Setpoints screen page 1 of 9 S102 Temperature Control Sensor Selects which sensor will be controlling the cooling capacity Coo...

Page 115: ...nit based on time away from setpoint so that accurate temperature control can be maintained The proportional and integral work together to maintain setpoint Large P Band with Small I Time is typical when controlling to supply air S108 AutoSet Enable Sets the temperature and humidity proportional bands automatically based on the type of unit when this parameter is set to YES and if teamwork modes a...

Page 116: ...er should only be adjusted by a factory service trained technician The transition capacity filter controls how quickly the capacity changes between different modes of operation This filter helps with the transition to avoid overshoot 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 ...

Page 117: ...ter the compressors and humidifier will increase capacity Too small of a number may cause the unit to short cycle or overshoot setpoint S128 Humidity Integration Time Adjusts the capacity of the unit based on time away from setpoint so that accurate humidity control can be maintained If the integration time is set to 0 the humidity control operates as a proportional only control When an integratio...

Page 118: ...e or temperature setpoint See 8 8 Service Economizer Menu Screens for more information S136 DT1 Room Outdoor Value Field adjustable setpoint or temperature Type setpoint or temperature is based on the setting on S135 S137 DT2 Room FC Fluid Type Determines the method to activate the water circuit on Dual Cool and free cool units It may be set to CONTACT TEMP or SET CONTACT which uses a dry contact ...

Page 119: ...the actual temp to settle higher than setpoint S149 Fan Temp Prop Integral Adjusts the fan speeds rate of change based on the actual sensor values deviation from setpoint The smaller this number the faster the fans will increase speed Too small of a number may cause the fans to increase decrease and overshoot setpoint Temperature Integration Time Adjusts the fans of the unit based on time away fro...

Page 120: ...gh Return Temperature Limit Sets the temperature limit that will increase the fan speed to decrease the return temperature Some compressors may require this limit to prevent extremely high return temperatures that could potentially cause degradation of the compressor oil that could decrease the overall compressor life expectancy S15B Return Limit P Band Sets the rate of fanspeed increase as the ac...

Page 121: ...S disconnect occurs the fan speed will lock to this point This setting is available when the fan control sensor is set to Manual Coupled Allows the fan speed to be controlled off the air temperature setpoint The fan speed will follow the call for cooling as described in 3 1 1 Unit Fan Control Backup Set Allows the user to program an alternate fan setpoint for the unit to use when a BMS disconnect ...

Page 122: ... to vibration harmonics that the fans may apply to the units frame These parameters will be set from the factory based on model type and should not need adjusted in the field S173 Stop BDR when System is Off The above is true when S173 Stop BDR when System is Off is set to Yes If S173 is set to No the BDR mode will not be interrupted unless BDR is disabled or the unit is restarted S174 Remote Off ...

Page 123: ...ilter Controls how quickly the fan speed changes between different modes of operation 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 avoi...

Page 124: ...n relation to the difference between the pressure reading and the SP Setpoint This parameter is selectable from 0 010 1 003 in WC The default is 0 020 inWC S196 SP During Dehum Sets the use of static pressure control if dehumidification becomes active If set to Disabled then the static pressure routines will become inactive and the fan will be allowed to ramp to the dehumidification speed set on l...

Page 125: ...ed 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 Figure 91 Standby settings lead lag screen S502 Number of Standby Units Selects the number of units that will be in Standby mode When a unit is in standby mode the fan will be Off and no co...

Page 126: ... control will not revert back to S509 until all required units have been restarted in cascade This parameter range is 0 30 minutes The default is 2 minutes S511 Cascaded Units Min Run Sets a minimum run time after a commanded unit is turned On The timer must expire before the unit can go back into standby This parameter range is 2 360 minutes The default is 30 minutes S512 Cascaded Units Control D...

Page 127: ...us when a service visit finds that all components are working optimally S004 Max Penalty Decreases the time to the next maintenance cycle Service personnel should assign a penalty when a service visit finds excessive wear on components S005 Last Maintenance Indicates to service personnel the date of the last visit This parameter is set during the service call S006 Service Engineer Provides a label...

Page 128: ...Service Menu Parameters Liebert iCOM for Liebert DSE 120 Figure 93 Wellness Motor settings screen page 2 of 9 Figure 94 Wellness Compressor 1 settings screen page 3 of 9 ...

Page 129: ...Service Menu Parameters 121 Liebert iCOM for Liebert DSE Figure 95 Wellness Compressor 2 settings screen page 4 of 9 Figure 96 Wellness Electric heater 1 settings screen page 5 of 9 ...

Page 130: ...Service Menu Parameters Liebert iCOM for Liebert DSE 122 Figure 97 Wellness Electric heater 2 settings screen page 6 of 9 Figure 98 Wellness Electric heater 3 settings screen page 7 of 9 ...

Page 131: ...Service Menu Parameters 123 Liebert iCOM for Liebert DSE Figure 99 Wellness Humidifier settings screen page 8 of 9 Figure 100 Wellness Economizer settings screen page 9 of 9 ...

Page 132: ...sor 2 high temperature event alarm counter If more than five events in a rolling 4 hour period occur then the compressor will be locked out S306 LP 1 Alarm Code Compressor 1 low pressure alarm code 0 no alarm 2 low pressure alarm active S307 LP 2 Alarm Code Compressor 2 low pressure alarm code 0 no alarm 2 low pressure alarm active S308 Actual LP1 Pressure Current refrigerant low pressure side rea...

Page 133: ...abled If Manual mode is enabled this parameter selects the mode of compressor operation The choices are Run Evacuate and Charge To access any mode press the Enter key while S315 is highlighted The compressor mode may be changed by pressing the Up or Down arrow key Once the desired mode is shown press the Enter key The compressor state on the following line must be placed to On if Run or Charge mod...

Page 134: ...ollowing line must be placed to On if Run or Charge mode has been selected No further action is required for Evacuate mode S321 Compressor 2 Standard compressor models Read only status when Manual mode is not enabled When Manual mode is enabled the parameter can be change from No to Yes allowing the compressor to operate as defined on the previous line S321 Compressor 2B 2A Tandem compressor model...

Page 135: ...humidification Output Read Only On Off status of dehumidification S329 Humidifier Fill Activates the humidifier water source solenoid valve which fills the humidifier pan or canister with water S330 Humidifier Activates the humidifier system in its entirety S331 Humidifier Drain Liebert HPM only Activates the humidifier drain solenoid allowing water to drain from the canister if the unit is equipp...

Page 136: ...S339 BV Control Activates the following two items allowing the motorized ball valve to be manually opened or shut S340 MBV Position Specifies the percentage that Valve 1 should be open Range is 0 to 100 S341 344 Analog Out 1 2 3 4 Specifies the analog output percentage subsequently controlling the device connected to that output Range is 0 to 100 but also depends on the output s assignment in fact...

Page 137: ...us 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 S349 352 Status Customer Input 1 2 3 4 Shows the status of the unit s customer inputs S353 Status Heaters Safety Status shows the safety heaters switch S354 Loss of Airflow At Sets the airflow at which the Loss of Airflow is activated This parameter is adjustable from...

Page 138: ...pressor 2 high pressure switch input S360 Status LP2 Shows the status of the unit s Compressor 2 low pressure switch input S361 Status C2 OL Shows the status of the unit s Compressor 2 overload input Figure 107 Diagnostics service mode screen page 7 of 8 S367 Status Humidifier Problem Shows the status of the high water level indicator on an infrared humidifier S368 Status DT1 Outdoor Glycol Indica...

Page 139: ...ol The feedback signal constantly provides the Liebert iCOM with the valve s position eliminating the need to reset the valve s on a loss of power and provides a valve failure detection S380 Start Valve Calibration Changing this value to Yes starts the valve calibration procedure of the 3P Actuator The unit must be powered down on the I O key before calibration can be preformed During this procedu...

Page 140: ...umidity when a return low humidity alarm will occur S207 Sensor A Alarms Enables or disables the alarms associated with Sensor A if the unit is equipped with the optional temperature humidity sensor S208 High Temperature Sensor A Sets the threshold temperature when a Sensor A high temperature alarm will occur S209 Low Temperature Sensor A Sets the threshold temperature when a Sensor A low temperat...

Page 141: ...activation delay for when a dew point alarm will become active after either the high or low threshold has been exceeded S218 High Low Dew Point Sensor A Sets the high and low dew point alarm thresholds for Sensor A S219 REM Sensor Alarms Init Delay Three selectable options are available for the parameter displayed on the left Disabled Com Set and Sep Set Disabled prevents remote temperature sensor...

Page 142: ...s the buzzer triggers a monitoring event triggers the alarm relay and flashes the red LED on the display Warning Annunciates the buzzer triggers a monitoring event shows the event in the event viewer front display and flashes the red LED on the display Message Shows the event in the event viewer and on the front display Delay The delay selection for each alarm EN DIS The enable disable selection f...

Page 143: ...Service Menu Parameters 135 Liebert iCOM for Liebert DSE Figure 112 Set alarms screen page 4 of 12 Figure 113 Set alarms screen page 5 of 12 ...

Page 144: ...Service Menu Parameters Liebert iCOM for Liebert DSE 136 Figure 114 Set alarms screen page 6 of 12 Figure 115 Set alarms screen page 7 of 12 ...

Page 145: ...Service Menu Parameters 137 Liebert iCOM for Liebert DSE Figure 116 Set alarms screen page 8 of 12 Figure 117 Set alarms screen page 9 of 12 ...

Page 146: ...Service Menu Parameters Liebert iCOM for Liebert DSE 138 Figure 118Set alarms screen page 10 of 12 Figure 119 Set alarms screen page 11 of 12 ...

Page 147: ...ert 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 S725 Override Permits manual testing the Liebert iCOM DO by activating each output on the following screen ...

Page 148: ...on 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 Output Shows which output is tied to a particular alarm The default values are set to be the same output as the Liebert ENV DO card the predecessor to the Liebert iCOM DO The ID s are linked to S725 Status R...

Page 149: ...ors Only Adjusts the Digital Scroll 1A NTC reading from the actual sensor to compensate for any error or drift of the sensor S607 Calibrated Digiscroll 1 NTC Shows the adjusted Digital Scroll 1 NTC sensor value This value is the actual sensor reading plus or minus the offset on line 606 Digital Scroll 1 NTC S607 Calibrated Digiscroll 1B 1A NTC Tandem Compressors Only Shows the adjusted Digital Scr...

Page 150: ...ons are TH Temperature Humidity and 2T two temperature depends on type of sensor installed Figure 126 Sensor calibration setup screen page 3 of 7 S624 Freecool Sensor PTC or NTC Currently supports only the NTC selection S625 Freecool Sensor Adjusts the free cooling temperature reading from the actual sensor to compensate for any sensor error or to match other sensors in the room S626 Calibrated Fr...

Page 151: ...ue of the outdoor temperature This value is the actual sensor reading or the Offset Outdoor Temperature S632 Offset Outdoor Humidity Adjusts the outdoor humidity reading from the actual sensor reading to compensate for any sensor error or to match other sensors S633 Calibrated Outdoor Humidity Shows the adjusted humidity value of the outdoor humidity sensor This value is the actual sensor reading ...

Page 152: ...ure transducer This parameter is selectable in inWC or PA The default is PA S659 DP Transducer Low Sets the unit of measure that will be used for the low differential pressure transducer This parameter is selectable from 0 9 999 inWC The default is 0 000 inWC S660 DP Transducer High Sets the unit of measure that will be used for the high differential pressure transducer This parameter is selectabl...

Page 153: ... the unit of measure that will be used for the static pressure transducer This parameter is selectable in inWC or PA The default is PA S672 SP Transducer Low Calibrates the static pressure transducer Sets the value displayed at the starting point of the analog input signal This parameter is selectable from 0 9 999 inWC or 0 0 2491 0 Pa The default is 0 000 inWC or 0 0 Pa S673 SP Transducer High Ca...

Page 154: ... Read only value that displays the outdoor wet bulb temperature This reading will be in metric values SA06 Outdoor Temp Displays the actual outdoor temperature based on the Temperature Humidity sensor Sensor C When this parameter shows OK the outdoor temperature requirements have been met to use economization When NOK is shown the outdoor temperature is outside the operating range set in the Liebe...

Page 155: ...ir economizer sensor from being used in the eligibility calculation when SA16 Outside Air Sensor is set to Shared SA16 must be set to Shared before changing the parameter to No SA16 Outdoor Sensor Operation The parameter may be set to Local or Shared The default is Shared When set to Shared outdoor temperature and humidity readings are averaged among all connected units The average is used to dete...

Page 156: ... closed voltage This parameter may be set from 0V to 10 0V The default is 10 0V SA29 Outdoor Damper Position Shows the actual outdoor damper position read only SA30 Return Damper Position Shows the actual return damper position read only SA31 Enable Digital Outputs Enables Liebert Air Economizer digital output signal This parameter may be set to Yes or No The default is No SA32 Damper Runtime Sets...

Page 157: ...n the number of units use all teamworked units in the group for the calculation Available only if Teamwork Mode Based On is set to Average S808 Lock for Upgrade Used to save and update files for Liebert iCOM service tool updates Service tool updates are performed by specially trained and certified HVAC technicians S809 Configuration Safe Saves or loads configuration settings for the display that h...

Page 158: ... READ ONLY S817 U2U Protocol Always set to GBP S818 U2U Address Unique identifier for each unit on the network Display addresses range from 33 to 64 Each display on the U2U network must have a different U2U address S819 U2U Group Used to create zones or groups within a U2U network Once a group number is selected the display will see only devices with the same group number The group number can be c...

Page 159: ...show at the top right of every screen that has monitoring or configuration of that unit S830 Lock for Upgrade Locks the Liebert iCOM functions to permit upgrading firmware S831 Configuration Safe Saves or loads configuration settings for the control board that have been modified from the default to an internal file that can be downloaded uploaded using the Liebert iCOM Service Tool Selecting Save ...

Page 160: ...S841 U2U Address Unique identifier for each unit on the network Display addresses range from 33 to 64 Each display on the U2U network must have a different U2U address S842 U2U Group Creates zones or groups within a U2U network Once a group number is selected the display will see only devices with the same group number The group number can be changed to view other devices in different groups S843 ...

Page 161: ...ree cooling This parameter is factory set and read only S409 Valve Control Selects between two different methods to keep track of valve position when a stem 3P valve is installed in the unit This setting does not affect motorized ball valves If Time is selected then the valve position is tracked by an internal timer in the control to determine the position or opening of the valve If Feedback is se...

Page 162: ...d Liebert PeX units only S419 Dehum Enabled Dehum Fan Ctrl Selects whether the compressor and or valve will be used to dehumidify when the humidity is above setpoint S420 Auto Restart Enabled Restarts the unit after a power cycle when set to Yes When this parameter is set to No the unit will not restart Turn On after a power cycle S421 Single Unit Auto Restart Sets a time delay for the unit to res...

Page 163: ...tivity The higher the number the more the ball valve will open at a given pressure S428 Heaters Outputs as Liebert HPM only Activates the heater digital output based on the selected event on units with no heaters S429 CW Valve Control Allows the valves to be set to operate in parallel alternate or cascade for units equipped with dual motorized ball valves controlling flow to the chilled water coil...

Page 164: ...asurements of the same type are required Precision Parameters in the Precision column must match the DIP switch settings for each analog input being used There are two choices for these parameters 0 5V and 0 10V This setting will also regulate the range of an analog input s linear characteristic on Page 5 of the Options Setup screen of the Service Menu see Figure 142 S441 Units system for Custom I...

Page 165: ... the desired readout at the highest allowable sensor voltage and the column on the right indicates the highest sensor voltage The range of allowable voltages is dictated by the Precision selection for that analog output on Page 4 of the Options Setup screen of the Service Menu see Figure 141 If the precision of Analog Input 1 is set to 0 5V on line S436 the voltage selection on line S447 will not ...

Page 166: ... the fan starts This parameter is adjustable from 0 to 120 seconds S460 Damper switch feedback damper Sets the timer for the damper when using Q15 This parameter is adjustable from 0 to 120 seconds The default setting is 30 seconds S461 Q15 Temp output sensor Sets the output sensor when using Q15 This parameter is adjustable from 0 to 120 seconds The default setting is 30 seconds S462 Q15 Temp out...

Page 167: ...red in this screen Table 25 Service contact information parameters Function Range Imperial metric Large Display Page 1 of 1 Password Country None Austria Switzerland D Switzerland F Benelux D Benelux FL Germany France UK Hungary Italy Poland Spain United States Australia New Zealand Indonesia Malaysia Singapore Address line 1 text string Address line 2 text string Address line 3 text string Addres...

Page 168: ...e consists of four parts sensor node name sensor reading and sensor setup Sensor Node Up to 10 wired 2T sensors can be connected to each unit Name Each node or sensor can be identified with a name chosen and entered by user to help identify sensors mounted in the facility Sensor names can be up to four alphanumeric characters long uppercase or lowercase and special characters are permissible The d...

Page 169: ...Service Menu Parameters 161 Liebert iCOM for Liebert DSE Notes ...

Page 170: ...Service Menu Parameters Liebert iCOM for Liebert DSE 162 ...

Page 171: ......

Page 172: ...ing liebert monitoring emerson com 800 222 5877 Outside North America 00800 1155 4499 Single Phase UPS Server Cabinets liebert upstech emerson com 800 222 5877 Outside North America 00800 1155 4499 Three Phase UPS Power Systems 800 543 2378 Outside North America 614 841 6598 Environmental Systems 800 543 2778 Outside the United States 614 888 0246 Locations United States 1050 Dearborn Drive P O Bo...

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