User ManualTable of ContentsImportant Safety Instructions7Save These Instructions7Product Model Information9Figure 1 Split system evaporators9Figure 2 Air-cooled systems—indoor centrifugal condensing units9Figure 3 Air-cooled systems—outdoor prop fan condensing units10Figure 4 Water/glycol-cooled systems—indoor condensing units10Figure 5 Chilled water systems11Table 1 System configurations—60 Hz11Table 2 System configurations—50 Hz111.0 Introduction121.1 Designed to Match Computer and Electronic Equipment Needs—From Installation to Operation12Liebert Precision Cooling12Easy Installation12Easy to Service12Advanced Control Technology12High Efficiency12Space Saving Design12Reliable12Agency Listed12Location122.0 Standard Features—5 Ton Systems132.1 Evaporator Section—Split System132.2 Condensing Unit Section—Split System132.2.1 Indoor Centrifugal Fan Condensing Units132.2.2 Outdoor Prop Fan Condensing Units132.2.3 Indoor Water/Glycol Condensing Units132.3 Chilled Water Units132.4 System Controls14Figure 6 Wall-box142.4.1 Other Standard Control Features143.0 Optional Factory-Installed Features - Evaporator/Chilled Water Units153.1 Reheat153.2 Humidifier153.3 Sensors153.4 Switches and Motors153.5 Free-Cooling16Figure 7 Free-cooling arrangement163.6 Optional Configurations—Prop Fan Condensing Units163.7 Optional Configurations—Water/Glycol Condensing Units163.8 Optional Configurations—Chilled Water Units174.0 Ship-Loose Accessories—Field-Installed184.1 Remote Monitoring, Autochangeover and Leak Detection Equipment185.0 Site Preparation and Installation205.1 Installation Considerations20Table 3 Application limits, evaporator and chilled water units*20Table 4 Application limits, indoor and outdoor air-cooled condensing units20Table 5 Application limits, indoor water/glycol cooled condensing units205.1.1 Room Preparation205.1.2 Location Considerations21Figure 8 Air-cooled systems21Figure 9 Water/glycol cooled systems22Figure 10 Chilled water systems225.2 Ceiling Unit Weights22Table 6 Unit weights225.3 Equipment Inspection Upon Receipt235.4 Installing the Ceiling Units235.4.1 Close Coupled Installations235.4.2 Evaporator Air Distribution23Filter Box23Connections for Ducted Systems24Table 7 Evaporator external static pressure245.4.3 Piping Connections and Coolant Requirements24Drain Line24Humidifier Water Supply Line24Table 8 Recommended refrigerant line sizes25Table 9 Equivalent lengths for various pipe fittings, ft (m)25Figure 11 Refrigerant piping diagram26Table 10 Pipe length and condenser elevation relative to evaporator26Total refrigerant = Units and Lines*27Table 11 Refrigerant charge27Table 12 Line charges - refrigerant per 100 ft. (30m) of Type L copper tube27Quick Connect Fittings27Table 13 Refrigerant quick connect sizes and torque27Figure 12 Evaporator unit dimensional data28Figure 13 Threaded rod and hardware kit installation295.4.4 Electrical Connections29Power Connections30Control Connections30Figure 14 Evaporator unit electrical connections31Figure 15 Close coupled installation325.5 Indoor Air-Cooled Centrifugal Fan Condensing Unit Installation335.5.1 Location Considerations335.5.2 Electrical Connections33Power Connections33Control Connections335.5.3 Piping Connections335.5.4 Ducting33General Considerations33Considerations for Specific Applications33Figure 16 Indoor air-cooled centrifugal condensing unit dimensions and pipe connections34Figure 17 Indoor air-cooled centrifugal condenser electrical connections35Figure 18 System piping with indoor or outdoor air-cooled condensing unit365.6 Outdoor Air-Cooled Condensing Unit Installation375.6.1 Location Considerations37Figure 19 Dimensions—Air-cooled systems, standard ambient outdoor condensing module37Table 14 Weights for standard ambient outdoor condensing modules, air-cooled systems37Figure 20 Dimensions—Air-cooled systems, high ambient and Quiet-Line condensing module38Table 15 Net weight, high ambient and Quiet-Line condensing modules, air-cooled systems385.6.2 Piping Connections385.6.3 Electrical Connections38Power Connections38Control Connections385.7 Indoor Water- and Glycol-Cooled Condensing Unit Installation395.7.1 Location Considerations395.7.2 Electrical Connections39Control Connections395.7.3 Piping Connections39Water/Glycol Piping Considerations39Condensing Unit Fluid Requirements39Regulating Valve39Figure 21 Indoor water/glycol condensing unit dimensional data40Figure 22 Indoor water/glycol condensing unit electrical field connections41Figure 23 System piping with indoor water/glycol cooled condensing unit425.8 Optional Equipment Piping425.8.1 Free-Cooling Coil42Figure 24 Optional free-cooling coil (3-way valve) on water/glycol units435.8.2 Hot Water Reheat Coil43Figure 25 Optional hot water reheat (two-way valve)435.9 Checklist for Completed Installation446.0 Microprocessor Control456.1 Feature Overview45Figure 26 Wall box456.2 Main Menu <Menu>466.3 Setpoints46Table 16 Default setpoints and allowable ranges476.4 Status476.5 Active Alarms476.6 Time476.7 Date476.8 Setback47Table 17 Night and weekend setback plan476.9 Setup Operation486.9.1 Restart Time Delay486.9.2 C/F Degrees486.9.3 Humidity Control Method486.9.4 Show DIP Switch486.9.5 Valve Time (for Systems With a Modulating Chilled Water Valve)496.9.6 CW Flush (for Systems with a Modulating Chilled Water Valve)49Table 18 Setup functions, default values and allowable ranges496.10 Change Passwords496.11 Calibrate Sensors496.12 Alarm Enable506.13 Alarm Time Delay50Table 19 Alarm default time delays506.14 Common Alarm Enable506.15 Custom Alarms516.15.1 Standard Custom Alarm Messages516.16 Custom Text51LCD Display Contrast51Nonvolatile Memory51Equipment Options Switches52Table 20 Equipment switch settings (unit control board)52Table 21 Switch settings (wall box board)526.17 Run Diagnostics (Available On Rev 1.001.0 and higher)52Show Inputs52Test Outputs53Test Control Board53Figure 27 Control menu54Figure 28 Control board—inside evaporator55Figure 29 Wall box board557.0 System Performance Microprocessor Controls567.1 Temperature Control567.1.1 Cooling/Heating Required567.1.2 Cooling Operation (Compressorized Direct Expansion and Chilled Water)56Table 22 Cooling and dehumidification load response of hot gas bypass567.1.3 Heating Operation56Electric Heat or Hot Water56SCR Electric Reheat567.2 Humidity Control567.2.1 Dehumidification/Humidification Required567.2.2 Dehumidification Operation, Compressorized Direct Expansion (DX) Systems567.2.3 Humidification Operation577.3 Load Control Features577.3.1 Communications578.0 Alarms588.1 Alarms: Definitions and Troubleshooting588.1.1 Custom Alarms588.1.2 High Head Pressure58Air-Cooled Systems59Water/Glycol/ Systems598.1.3 Humidity Level598.1.4 Temperature598.1.5 Humidifier Problem Alarm598.1.6 High Water Alarm598.1.7 Loss of Power608.1.8 Short Cycle608.2 Optional/Custom Alarms608.2.1 Change Filter608.2.2 High Temperature Sensor608.2.3 Smoke Sensor609.0 System Operation, Testing and Maintenance619.1 System Testing619.1.1 Environmental Control Functions619.1.2 Cooling619.1.3 Heating619.1.4 Humidification619.1.5 Dehumidification619.1.6 Remote Shutdown619.2 Maintenance and Component Operation619.2.1 Electric Panel619.2.2 Filters619.2.3 Blower System62Air Distribution629.2.4 Blower Removal629.2.5 Refrigeration System62Suction Pressure62Discharge Pressure63Table 23 Typical discharge pressure63Thermostatic Expansion Valve63Air-Cooled Condensing Units63Coaxial Condensers (Water/Glycol-Cooled Condensing Units)63Regulating Valves (Water/Glycol Condensing Units)63Glycol Solution Maintenance63Hot Gas Bypass64Figure 30 Hot gas bypass649.3 Replacement Procedures659.3.1 Compressor Replacement65Mechanical Failure659.3.2 Electrical Failure65Replace a Failed Compressor669.3.3 Steam Generating Humidifier-Operation Procedures67Replacing the Humidifier Canister689.3.4 Humidifier Circuit Board Adjustments68Table 24 Humidifier control board DIP switch settings6810.0 Maintenance Inspection Checklist69Filters69Fan Section69Humidifier69Drain lines69Compressor Section69Refrigeration Cycle69Air-Cooled Condensing Unit (if applicable)69Flood Back Head Pressure Control69Water- or Glycol-Cooled Condensing Unit69Glycol Pump (if applicable)69Electric Panel69Electric Reheat69Signature:________________________________________________________________6911.0 Troubleshooting70Table 25 Troubleshooting70Size: 2.6 MBPages: 72Language: EnglishOpen manual