Liebert 50 & 60Hz, 8 Tons user manual Date, Setback, Setup Operation, Restart Time Delay

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Microprocessor Control

3.7Time

The controller time clock must be set to allow for the setback control. The clock uses the 24-hour sys- tem (i.e., 12 midnight is entered 24:00). To change the time press ENTER to select the function, then use the UP/DOWN arrow to change the first character, press ENTER to store, then press the UP/ DOWN arrow key to change the character, press ENTER to store, etc. The real time clock is backed- up.

3.8Date

The controller date must be set to allow for setback control. To change the date press ENTER, then use the UP/DOWN arrow to change the first character, press ENTER to store, press the UP/DOWN arrow key to change the second character, etc.

3.9Setback

The microprocessor can be programmed for night and weekend setback. Two (2) events can be pro- grammed for a five-day workweek and two (2) events can be programmed for a two-day weekend. The following table can be used to devise a setback plan.

Table 11 Night and weekend setback plan

Event

Weekend

Weekday

Time 1

Temperature1

Sensitivity 1

Humidity 1

Humidity Sensitivity 1

Time 2

Temperature 2

Sensitivity 2

Humidity 2

Humidity Sensitivity 2

3.10Setup Operation

Selecting SETUP OPERATION from the Main Menu will display the following selections:

•RESTART TIME DELAY

•C/F DEGREES

•HUMIDITY CONTROL METHOD

•LEAD COMPRESSOR

•SHOW DIP SWITCH

•VALVE TIME (if valve present)

•CW FLUSH (if valve present)

Use the UP/DOWN ARROW to scroll through the submenu. Press ENTER to select a particular function.

3.10.1Restart Time Delay

This function delays unit restart after main power is restored to the unit. If several systems are oper- ating, the time delays should be set to different values to cause a sequential start. Delay can be set from 0.1 minutes (6 seconds to 9.9 minutes. Setting the value to zero (0) will prevent unit restart when power is restored. In this case, the unit must be restarted manually by pressing the ON/OFF button on the keypad.

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Contents Liebert Mini-Mate2 Page Table of Contents System Performance Microprocessor Controls Microprocessor ControlSystem OPERATION, TESTING, and Maintenance AlarmsFigures Table iv Heat rejection matchup 50 Hz Table iii Heat rejection matchup 60 HzPage Standard Product Features Optional Equipment Ancillary Ship Loose Accessories Input Voltage Entering Fluid Temperature Min Installation ConsiderationsRoom Preparation Application limits, evaporator and chilled-water unitsLocation Considerations Drycooler Evaporator System Weights Unit weightsEquipment Inspection upon receipt Installing the Evaporator or Chilled-Water Units NylockLocking nut Hex nut Nut Clamps are for shipping purposes only Close Coupled InstallationsConnections for Ducted Systems Evaporator Air Distribution Filter BoxEvaporator external static pressure 60 at 3750 CFM 6371 CMH Hp Motor std Hp Motor opt Turns External OpenPiping Connections and Coolant Requirements Drain Line Drain installationHumidifier Water Supply Line Condensate PumpChilled-Water Piping-Chilled-water Systems Only General arrangement diagram chilled-water systemsRefrigerant R-22 Piping Recommended refrigerant line sizesEquivalent Suction Feet Circuit Liquid Line Quick Connect Fittings Total refrigerant = Units and LinesTon unit refrigerant charge Line charges field pipingOptional Filter BOX Electrical Connections, Evaporator or Chilled-Water Unit Power ConnectionsFront of Unit Evaporator unit electrical connectionsDucting General ConsiderationsConsiderations for Specific Applications Piping Connections Electrical Connections Condensing UnitControl Connections DPN000248Rev1 Heat rejection connection. Field Electrical Connections Outdoor Air-Cooled Condensing Unit InstallationHigh voltage Electric service connectionLow voltage Earth ground connectionFootprint Dimensions 11-1/2 152292 Water/Glycol Piping Considerations Condensing Unit Fluid RequirementsRegulating Valve Indoor water/glycol condensing unit dimensional data Site Preparation and Installation Two circuits provided. Single circuit shown Optional free cooling coil 3-way valve on water/glycol units Optional Equipment PipingOptional free cooling coil 3-way valve on air-cooled units Checklist for Completed Installation Wall box Feature OverviewMain Menu Menu Alarm History Active AlarmsDefault setpoints and allowable ranges SetpointsRestart Time Delay Setup OperationTime Date10.2 C/F Degrees Show DIP SwitchHumidity Control Method Lead CompressorAlarm Enable Change PasswordsSetup functions, default values and allowable ranges Calibrate SensorsCommon Alarm Enable Alarm Time DelayCustom Alarms Alarm default time delaysCustom Text Equipment Options SwitchesLCD Display Contrast Nonvolatile MemoryRun Diagnostics Test OutputsTest Inputs Test Micro TB3-4 Connection to Terminal #4 Wallbox TB3-1 TB3-2 TB3-3 TB4-4 Wall Box DIP SwitchesTB3-3 Connection to Terminal #3 Wallbox TB3-2 Connection to Terminal #2 WallboxControl Type Response Proportional Control CoolingReheat Dehumidification / Humidification Percent Required Load Control FeaturesCommunications Humidification Operation System ActivationCustom Alarms Alarms Definitions and TroubleshootingHigh Head Pressure Air-Cooled SystemsHumidifier Problem Alarm TemperatureHigh-Water Alarm Loss of PowerChange Filter Optional/Custom AlarmsSystem Testing Maintenance and Component Operation Suction Pressure Refrigeration SystemDischarge Pressure Thermostatic Expansion ValveGlycol Solution Maintenance Regulating Valves Water/Glycol Condensing UnitsHot Gas Bypass Optional Replacement Procedures Steam Generating Humidifier Operation Procedures Humidifier control board DIP switch settings Circuit Board AdjustmentsReplacing the Humidifier Canister AmpsMaintenance Inspection Checklist Troubleshooting Short Symptom Possible Cause Check or Remedy Cooling cycle tooDisplay freezes Control padsTroubleshooting Troubleshooting Troubleshooting Page Iti NetTin That