Emerson ITR manual Fan Speed Control FSC Head Pressure Control Standard, Design Pressure

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Electrical Data

Fan Speed Control (FSC) Head Pressure Control (Standard)

The winter control system for the air-cooled condenser shall be Liebert Fan Speed Control (FSC). The variable speed motor shall turn on at 10% of the supply voltage and modulate in response to head pressure to a full speed of 1050 RPM. It shall be designed with ball bearings, permanent lubrication, and internal overload protection.

The control system shall be complete with transducers, thermostats and electrical control circuit, fac- tory prewired and tested in an integral control panel. The transducer shall automatically sense the head pressure of the compressor and control the variable speed fan on the air-cooled condenser to properly maintain the head pressure.

The fan speed control system shall provide positive start-up and operation in ambient temperature as low as -20°F (-29°C). Included with the fan speed control system shall be a solid state winter start kit as an integral feature of the electronic control panel.

Liebert Lee-Temp Head Pressure Control (Optional)

The winter control system for the air-cooled condenser shall be “Liebert Lee-Temp.” The Liebert Lee- Temp system shall allow startup and positive head pressure control with ambient temperatures as low as -30°F (-34.4°C). The Liebert Lee-Temp package shall include: insulated receiver, pressure relief valve for each circuit, head pressure three-way control valve, and rotalock valve for isolating the refrigerant charge. The Lee- Temp receiver shall be factory insulated and mounted ready for the field connection to the air-cooled condenser. The Liebert Lee-Temp heater shall be (150) (300) _____ Watt

and require a separate power supply of (115) (230) _____ Volt, single phase, _____ Hz.

Centrifugal Fan Condenser (Optional)

The system shall be supplied with a centrifugal fan condenser (LCC). The condenser shall be con- structed of galvanized steel with a copper tube, aluminum fin coil. The heavy duty fan shall be the centrifugal type, double width, double inlet. The 1750 RPM (1450 RPM @ 50 Hz) fan motor shall be mounted on an adjustable base, and equipped with an adjustable motor pulley. A Liebert Lee- Temp head pressure control system shall be field piped to the unit. Electrical controls shall be in a rain- tight enclosure.

The system shall be designed for _____ °F (°C) ambient. The air-cooled condenser shall have a _____

Volt, 3 phase, _____ Hz power supply.

2.2.2Water or Glycol-Cooled Self-Contained Systems

Indoor Unit Condenser

The water/glycol system shall be equipped with a coaxial condenser having a total pressure drop of

_____ ft. of water (kPa) and a flow rate of _____ GPM (l/s) with _____ °F (°C) entering water/glycol temperature.

Two-way Water Regulating Valve with Bypass (Standard)

The condenser circuit shall be pre-piped with a headpressure actuated two-way regulating valve with bypass.

Three-Way Water Regulating Valve (Optional)

The condenser circuit shall be pre-piped with a head pressure actuated three-way regulating valve.

Design Pressure

The condenser water/glycol circuit shall be designed for a pressure of [(150 PSI (1034 kPa)) (350 PSI (2413 kPa))].

Crankcase Heater (Optional)

A crankcase heater is provided to prevent the migration of refrigerant to the compressor during off cycles.

Hot Gas Reheat (Optional)

The complete hot gas reheat system shall include a copper tube, aluminum fin coil, three-way sole- noid valve, and refrigerant check valve. The capacity of the coil shall be _____ BTU/HR (kW).

70/30 Cu-Ni Econ-O-Coil

This coil replaces the standard copper tube coil to provide improved resistance to corrosion.

This option must be specified whenever a GLYCOOL or Dual Cooling Source system is applied to a cooling tower loop or other open water system.

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Contents Liebert Challenger ITR Table iii Self-contained system configurations Split system configurationsTable i Product model information Table of Contents Optional EQUIPMENT-ALLSYSTEMS AIR-COOLEDSYSTEM-STANDARD and Optional FeaturesGlycool SYSTEMS-STANDARD and Optional Features Refrigeration SystemsSystem Data Dimensional Drawings Electrical Data Comprehensive Monitoring SOLUTIONS-OPTIONALComprehensive Monitoring SYSTEMS-OPTIONAL Figures Page Page Air Filtration Temperature ControlAir Volume Humidity ControlLiebert Challenger ITR Multiple Configurations to Fit a Variety of SpacesEfficiency in Economic Terms Unit configurations Image is Illustrative only Internal System Control DiagnosticsControl Control TypeGraphical Displays-Advanced Graphic Control Only AlarmsCustom Alarm Maximum of Four LoggingInfrared Humidifier Cabinet and FrameElectrical Panel Fan SectionCondensate pump capacity Remote Temperature/ Humidity SensorsDisconnect Switch-Locking Type Condensate PumpChilled Water System-Optional Features Chilled Water System-Standard FeaturesSelf-Contained Systems Refrigeration System Components-Standard FeaturesSplit Systems Air-Cooled, Self-Contained Systems-Optional Features Air-Cooled, Self-Contained Systems-Standard FeaturesPropeller Fan Condensing Unit Air-Cooled Split Systems-Standard FeaturesAir-Cooled Split Systems-Optional Features Centrifugal Fan, Condensing UnitWater/Glycol Split System-Standard Features Water/Glycol Self-Contained Systems-Standard FeaturesFactory Installed Non-Fused Disconnect Switch Water/Glycol-Cooled, Split System-Optional FeaturesGlycol Pump GLYCOOL-Self-Contained Models Only Glycool System-Standard FeaturesEvaporator Coil Econ-O-Coil Three-way Glycool Control Valve Glycol and GLYCOOL-Cooled-Optional EquipmentDrycooler Quiet-Line DrycoolersSteam Generating Humidifier Steam generating humidifier Adjustable Floor StandHigh-Efficiency Motors SCR ReheatHigh-Efficiency Filter High External Static BlowersFirestat Smoke DetectorFirestat Hot Water ReheatEnterprise Monitoring Systems Stand-Alone Monitoring and Leak Detection SolutionsNetwork Monitoring Systems Discrete Output Interface Card Leak Detection ModulesEnvironmental Discrete Outputs Card Liebert SiteScan WebLiebert SiteLink Liebert NformUniversal Monitor Temperature and Humidity RecorderLeak Detection BR 067A BR 060E Liebert Challenger ITR air-cooled data-60 HzInfrared Humidifier Standard Evaporator Coil V-Frame, at Standard Conditions Liebert Challenger ITR air-cooled data-50 HzSystem Type Split Systems Fan Data Blower A12x9ATConnection Sizes Challenger ITR Unit Liebert Challenger ITR air-cooled data-50HzCondenser Air 35C 95F Ambient System Type Self-Contained Split Systems Liebert Challenger ITR water cooled data, 60 HzIndoor Unit BR 071WG BR 060E Net Capacity Data Water Requirements Coaxial Condenser Water Regulating ValveConnection Sizes Remote Condensing Unit BTU/H Liebert Challenger ITR water cooled data, 50 HzCapacity, kg/hr lb/hr Glycool Liebert Challenger ITR glycol cooled data, 60 HzSteam Generating Humidifier Optional Indoor UnitGlycool Liebert Challenger ITR glycol cooled data, 50 HzSystem Type Glycol Cooled Glycol Pump 3-Phase kW hpDrycooler 35C 95F Ambient Indoor Unit BR 102C Fan Data Blower A12x9AT Liebert Challenger ITR chilled water data, 60 HzIndoor Unit BR 101C Liebert Challenger ITR chilled water data, 50 Hz50 Hz 60 Hz Unit Weight Models Lb. kg Dimensional DrawingsOptional Floor Stand Model Net Weight 60 Hz 50 Hz Lbs kg MC69W MC68W 36-1/4 SL-11081Liebert Lee-Temp Receiver = 40 1016mm = 7-1/2 190mm Liebert Challenger ITR electrical data1-60 Hz Electrical DataElectric Reheat Only Motor Hp 1.1 kW Self-contained with SCR reheatMotor Hp 1.5 kW Motor Hp 2.2 kWMain Fan Motor Hp 1.1 kW Scroll compressor and main fan for comparison purposes onlyOutdoor condensing units Voltage 208 230 460 575 60 Hz Scroll CompressorIndoor condensing units, air-cooled Outdoor condensing units-Quiet-LineIndoor condensing units, water-cooled Voltage 208/230 460 575 Glycol Fan speed control condensersLiebert Lee-Temp condensers Drycooler and pump package 95F 35C ambientLiebert Challenger ITR electrical data-50 Hz Scroll compressor and main fan for comparison only Indoor condensing units water-cooled Indoor condensing units air-cooledDrycooler only 35C 95F ambient, single phase Drycooler only 35C 95F ambient, three-phasePumps All Systems SummaryDesign Requirements SubmittalsAdvanced Microprocessor Control Standard Diagnostics AlarmsAudible Alarm Common AlarmCommunications Advanced Microprocessor Control with Graphics OptionalAlarms Hot Water Reheat Optional Infrared Humidifier StandardSteam Generating Humidifier Optional Electric Reheat StandardDirect Expansion Self-Contained Systems Two-way Water Regulating Valve with Bypass Standard Fan Speed Control FSC Head Pressure Control StandardLiebert Lee-Temp Head Pressure Control Optional Centrifugal Fan Condenser OptionalGlycool Self-Contained Systems Outdoor UnitTon Models Direct Expansion Split SystemsCentrifugal Fan Condensing Unit Optional DisconnectWater or Glycol-Cooled Condensing Unit Water or Glycol-Cooled Split SystemsOptional Quiet-Line Models Optional High Ambient ModelsTwo-way Chilled Water Valve Optional Flow Switch OptionalChilled Water Self-Contained Systems Chilled Water Coil Three-way Chilled Water Valve StandardInstallation of Environmental Control Units Comprehensive Monitoring SolutionsField Quality Control Page That Ne tIti Ti n