Liebert 8 Tons Installing the Evaporator or Chilled-Water Units, Nylock, Locking nut Hex nut

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Site Preparation and Installation

2.4Installing the Evaporator or Chilled-Water Units

! WARNING

Be sure the supporting roof structure is capable of supporting the weight of the unit(s) and the accessories during installation and service. (See 2.2 - System Weights.)

Be sure to securely anchor the top ends of the suspension rods. Make sure all nuts are tight.

The evaporator unit and indoor condensing unit are usually mounted above the ceiling and must be securely mounted to the roof structure. The ceiling and ceiling supports of existing buildings may require reinforcements. Be sure to follow all applicable codes. Use field-supplied 1/2"-13 tpi threaded suspension rods and 1/2"-13 tpi hardware kit.

Recommended clearance between ceiling grids and building structural members is unit height plus 3 inches.

Install the four field-supplied rods by suspending them from suitable building structural members. Locate the rods so that they will align with the four mounting holes in the flanges that are part of the unit base.

Using a suitable lifting device, raise the unit up and pass the threaded rods through the four mount- ing holes in the flanges that are part of the unit base.

Attach the threaded rods to the unit flanges using the supplied, springs, and washers. (See Figure 4). The coil springs provide vibration isolation.

1.Use the plain nuts to hold unit in place. Adjust these nuts so that the weight of the unit is supported by the four rods, does not rest on the ceiling grid, and is level. Ensure none of the springs are compressed to solid height. The coil side of the unit is heavier, so these springs will be compressed more than the other side.

NOTE

The units must be level in order to drain condensate properly.

2. Use the Nylock nuts to “jam” the plain nuts.

Figure 4 Threaded rod and hardware kit installation

1/2" threaded rod (supplied by field)

hanging bracket

1" O.D. spring

 

1/2" flat washer

base pan (ref)

1/2" Nylock

locking nut

1/2" hex nut

 

8

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Contents Liebert Mini-Mate2 Page Table of Contents Microprocessor Control System Performance Microprocessor ControlsAlarms System OPERATION, TESTING, and MaintenanceFigures Table iii Heat rejection matchup 60 Hz Table iv Heat rejection matchup 50 HzPage Standard Product Features Optional Equipment Ancillary Ship Loose Accessories Installation Considerations Input Voltage Entering Fluid Temperature MinRoom Preparation Application limits, evaporator and chilled-water unitsLocation Considerations Drycooler Evaporator Unit weights System WeightsEquipment Inspection upon receipt Nylock Installing the Evaporator or Chilled-Water UnitsLocking nut Hex nut Close Coupled Installations Nut Clamps are for shipping purposes onlyEvaporator Air Distribution Filter Box Connections for Ducted SystemsEvaporator external static pressure 60 at 3750 CFM 6371 CMH Hp Motor std Hp Motor opt Turns External OpenDrain installation Piping Connections and Coolant Requirements Drain LineCondensate Pump Humidifier Water Supply LineGeneral arrangement diagram chilled-water systems Chilled-Water Piping-Chilled-water Systems OnlyRecommended refrigerant line sizes Refrigerant R-22 PipingEquivalent Suction Feet Circuit Liquid Line Total refrigerant = Units and Lines Quick Connect FittingsTon unit refrigerant charge Line charges field pipingOptional Filter BOX Power Connections Electrical Connections, Evaporator or Chilled-Water UnitEvaporator unit electrical connections Front of UnitGeneral Considerations DuctingConsiderations for Specific Applications Electrical Connections Condensing Unit Piping ConnectionsControl Connections DPN000248Rev1 Heat rejection connection. Field Outdoor Air-Cooled Condensing Unit Installation Electrical ConnectionsElectric service connection High voltageLow voltage Earth ground connectionFootprint Dimensions 152 11-1/2292 Condensing Unit Fluid Requirements Water/Glycol Piping ConsiderationsRegulating Valve Indoor water/glycol condensing unit dimensional data Site Preparation and Installation Two circuits provided. Single circuit shown Optional Equipment Piping Optional free cooling coil 3-way valve on water/glycol unitsOptional free cooling coil 3-way valve on air-cooled units Checklist for Completed Installation Feature Overview Wall boxMain Menu Menu Active Alarms Alarm HistoryDefault setpoints and allowable ranges SetpointsSetup Operation Restart Time DelayTime DateShow DIP Switch 10.2 C/F DegreesHumidity Control Method Lead CompressorChange Passwords Alarm EnableSetup functions, default values and allowable ranges Calibrate SensorsAlarm Time Delay Common Alarm EnableCustom Alarms Alarm default time delaysEquipment Options Switches Custom TextLCD Display Contrast Nonvolatile MemoryTest Outputs Run DiagnosticsTest Inputs Test Micro TB3-1 TB3-2 TB3-3 TB4-4 Wall Box DIP Switches TB3-4 Connection to Terminal #4 WallboxTB3-3 Connection to Terminal #3 Wallbox TB3-2 Connection to Terminal #2 WallboxCooling Control Type Response Proportional ControlReheat Load Control Features Dehumidification / Humidification Percent RequiredCommunications Humidification Operation System ActivationAlarms Definitions and Troubleshooting Custom AlarmsHigh Head Pressure Air-Cooled SystemsTemperature Humidifier Problem AlarmHigh-Water Alarm Loss of PowerOptional/Custom Alarms Change FilterSystem Testing Maintenance and Component Operation Refrigeration System Suction PressureDischarge Pressure Thermostatic Expansion ValveRegulating Valves Water/Glycol Condensing Units Glycol Solution MaintenanceHot Gas Bypass Optional Replacement Procedures Steam Generating Humidifier Operation Procedures Circuit Board Adjustments Humidifier control board DIP switch settingsReplacing the Humidifier Canister AmpsMaintenance Inspection Checklist Troubleshooting Symptom Possible Cause Check or Remedy Cooling cycle too ShortDisplay freezes Control padsTroubleshooting Troubleshooting Troubleshooting Page Net ItiTin That