Emerson DE, VH, VE, DH manual Water Detection Display, Physical Connections, Setup

Page 49

Response by Control Type—Advanced Microprocessor Controls

5.4.2Water Detection Display

The water detection display is designed to graphically display the location of water under a raised floor when connected to an LT750 water detection system. The graphical floor plan screen shows a 30 x 16 grid. Each square represents one standard floor tile (approximately 2 ft. x 2ft.).

Figure 6 Connecting the LT750

 

 

 

41

TB6

2

-

42

1

 

43

 

+

 

 

44

 

 

 

 

3

NO

45

 

NC

46

TB5

2

C

47

fault

1

 

48

 

 

 

 

3

NO

24

 

NC

TB4

2

50

C

water

1

51

 

 

 

 

55

LT750

 

 

56

 

 

 

Environmental Unit

Physical Connections

The example above shows the 4-20 mA output of LT750 connected to Analog Input #1 (41 and 42) on the external inputs terminal strip. This strip is provided on units ordered with analog inputs. (If this strip is not installed, there is a field installation kit available from your Liebert representative.)

The 4-20 mA output of the LT750 must be connected to the first analog input, as shown. TB4 is the water detected relay output. It can be connected to any one of the four special alarm inputs. TB5 is the cable fault relay output. It can also be connected to any one of the four special alarm inputs.

Setup

The following description assumes wiring connections as shown in Figure 6.

First, verify that special alarms 1 and 2 are Enabled to either Warning or Urgent type. Do this by selecting View/Set Alarms from the Main Menu. Then, select Setup Alarms. Follow the instructions on the display to select the required type for Custom Alarm #1 and Custom Alarm #2 if not already set.

Next, select the alarm message for Custom Alarm #1 and #2. From the Main Menu, select View/Set Alarms. Then, select Setup Custom Alarms. Then, select Setup Custom Alarm Text. Define Custom Alarm #1 to be Custom 1. (Custom 1 is the default message that will be displayed if a message has never been programmed.) Next, select the text for custom alarm #2 to be Water Under Floor. Now, change the message Custom 1 to LT750 Cable Fault. This is done by selecting the Change Custom Text 1 menu item in the Setup Custom Alarms menu. Follow the instructions on the screen to change the message.

The slope and intercept values of Analog Input #1 are used to calculate the location of water. These values should initially be set to zero. The default values are zero, but it may be a good idea to verify those values. They can be viewed by selecting Analog/Digital Inputs from the Main Menu, then Setup Analog Inputs.

See 4.4.6 - Setup Water Detect Floor Plan for more information.

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Contents
Liebert Deluxe System/3 Page Table of Contents Main Menu AG-Run Diagnostics Temperature Control Alarm Descriptions and SolutionsSystem Testing Figures Page Introduction System DescriptionGlycool Chilled Glycol Cooling Systems Chilled Water SystemsDual Source Cooling Systems Additional Considerations for Upflow Units Initial START-UP ProcedureBasics Advanced Microprocessor Controls SetupDisplay the Main Menu-AM Control Advanced microprocessor AM control menu Active Alarms Main Menu AM-Status/Alarm DataAlarm History Log Operating StatusSetup System Selection Main Menu AM-Setpoints/SetupDefault control and alarm setpoints Analog SensorsSetup functions and factory default values Setup OperationFunction Default Range DIP switch settings Show DIP SwitchesSelect Options Calibrate SensorsSelect Control Type Setup AlarmsAlarm Default Delay seconds Alarm default time delayAnalog Setup Standard Alarm MessagesHumidity Control Method Set Status Display Run DiagnosticsCalibrate Actuator Show InputsMain Menu AM-Date and Time Change PasswordsTest Outputs Test Control BoardMain Menu AM-Status Display Load Control FeaturesControl Circuit Board Communications DIP SwitchesNonvolatile Memory Control OutputsView/Change Functions Monitor functionsAdvanced microprocessor with graphics control panel Advanced Microprocessor with Graphics Control SetupAdvanced microprocessor with graphics AG control menu Display the Main Menu-AG Control Main Menu AG-View/Set AlarmsMain Menu AG-Status Display Alarm Seconds Default Time DelayStandard Custom Alarm Messages Set Up Custom AlarmsSetup Water Detect Floor Plan Installation-LT750 DIP Switch SettingsMain Menu AG-Operating Status Main Menu AG-Setup SystemMain Menu AG-View/Set Control Setpoints Auto Restart Delay Cold Start DelayDefault Settings and Ranges IR Flush Overfill infrared humidifiers onlySelect Control Algorithm Calibrate Valve ActuatorSelect Humidity Sensing Mode Main Menu AG-Run DiagnosticsShow Inputs Main Menu AG-Date and Time Dehumidification with Normal or Delayed ReheatMain Menu AG-Plot Graphs Main Menu AG-Analog/Digital Inputs Main Menu AG-View Run Hours Log Set Up Digital InputsRead Digital Inputs View 24 Hour Run Time HistoryControl Circuit Board On/Off Status Time View Only Silence Alarm Response by Control TYPE-ADVANCED Microprocessor Controls Temperature ControlDual Cooling Source Glycool CoolingChilled Water Cooling Heating Operation Electric ReheatHot Water/Steam Heat Humidity ControlDehumidification/Humidification Required, in Percent % Control Types Proportional ControlChilled Water Dehumidification Dual Cooling Source DehumidificationHumidification Operation System Activation Suggested System Tuning Procedure Intelligent Control Load Control Features Analog Sensors Connecting the Analog SensorsChanging factory-set sensor inputs Additional connections available after unit deliveryWater Detection Display SetupPhysical Connections Calibration View/Change Functions Alarm Descriptions and Solutions Standard AlarmsChange Filter Compressor OverloadHigh Temperature Custom Alarms Only With Advanced ControlsHigh Temperature and Low Temperature Simultaneously Humidifier Problem Infrared HumidifiersLow Temperature Loss of PowerLoss of Air Flow Low HumidityOptional/Custom Alarms Component Operation and MAINTENANCE, Checks and Adjustments System TestingEnvironmental Control Functions Proportional Heating/Cooling/ DehumidificationElectric Panel Fan Safety SwitchControl Transformer and Fuses FirestatBlower Package FiltersFan Impellers and Bearings BeltsElectronic Variable Speed Drive Inverter Refrigeration SystemCompressor Oil Level Discharge Pressure Suction PressureSuction Superheat Thermostatic Expansion Valve OperationHot Gas Bypass Valve Operation AdjustmentAir Cooled Condenser Outdoor fan/condenser configurationTesting Function of Valve Adjustment Johnson Controls/Penn Johnson valvesGlycol Solution Maintenance Water/Glycol Cooled Condensers Shell and Tube CondensersMechanical Failure Compressor ReplacementElectrical Failure Humidifier Compressor Replacement ProcedureInfrared Humidifier Changing Humidifier Lamps Autoflush Infrared Humidifier Cleaning SystemAutoflush Operation Humidifier lampsSteam generating humidifier Steam Generating HumidifierReplacing the Canister ControlsHumidifier canister part numbers Faults-canister generator humidifierPriority Name LED Indication Description Steam generating humidifier capacity Circuit Board AdjustmentsCapacity Hz Models Lbs/hr kg/hrUnit Rated Rated Values Voltage Capacity Electric ReheatVoltage AMP Set Pt Blower troubleshooting TroubleshootingChilled water troubleshooting Symptom Possible Cause Check or RemedyCompressor and refrigeration system troubleshooting Compressor and refrigeration system troubleshooting Glycol pumps troubleshooting Dehumidification troubleshootingAdjustments on Humidifier-steam generator troubleshootingReheat troubleshooting Humidifier-infrared troubleshootingMaintenance Inspection CHECKLIST-MONTHLY Maintenance Inspection CHECKLIST-SEMIANNUAL Iti Ne tTi n That
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