Emerson 3000 Variable Fan Speed Charging, Fan speed suction pressure transducer settings

Page 35

Air-Cooled Models—Self-Contained Compressor

Variable Fan Speed Charging

1.Check unit nameplate for refrigerant type to be used. Unit control configurations differ depending on refrigerant type.

2.Refrigerant charging requires unit operation. Refer to 2.9 - Checklist for Completed Installation.

3.Calculate the amount of charge for the system. Refer to the unit, condenser and refrigerant line charge data in Tables 6, 7, 8 and 9.

4.Weigh in as much of the system charge as possible before starting the unit.

NOTICE

Risk of improper refrigerant charging. Can cause equipment damage.

Refrigerant R407C is a blend of three components and must be introduced and charged from the cylinder only as a liquid.

When adding liquid refrigerant to an operating system, it may be necessary to add the refrigerant through the compressor suction service valve. Care must be exercised to avoid damage to the compressor. Emerson recommends connecting a sight glass between the charging hose and the compressor suction service valve. This will permit adjustment of the cylinder hand valve so that liquid can leave the cylinder while allowing vapor to enter the compressor.

5.Turn On unit disconnect switch. Operate the unit for 30 minutes using the charging function for the system in the diagnostic section of the Liebert iCOM® control (see Liebert iCOM user manual, SL-18835). The charging function operates the compressor at full capacity and energizes the blower motor and the liquid line solenoid valve. The reheat and humidifier are disabled. A minimum 20psig (138kPa) must be established and maintained for the compressor to operate. The charging function can be reset as many times as required to complete unit charging.

Table 10 Fan speed suction pressure transducer settings

 

R-407C

 

 

 

 

 

Gauge (Sea Level)

 

Absolute

Function

 

 

 

psiG (kPa)

 

psiA (kPa)

 

 

 

 

Pump-Down Cutout

20 (138)

 

35 (241)

 

 

 

 

Pump-Down Reset

65 (448)

 

80 (552)

 

 

 

 

Minimum to Start-Cooling

35 (241)

 

50 (344)

 

 

 

 

Low-Pressure Cutout (DX only)

52 (358)

 

67 (461)

 

 

 

 

6.Charge the unit until the liquid line sight glass becomes clear. Then add one additional pound (2.2kg) of refrigerant.

NOTE

A digital scroll compressor will have a clear sight glass only when operating at 100% capacity. When operating below 100%, the sight glass may show bubbles with each 15-second unloading cycle.

7.As head pressure builds, the variable fan speed controlled condenser fan begins rotating. The fan will run at full speed when sufficient head pressure is developed—fan starts to rotate at 190 psig (1310 kPA) and is full speed at 250 psig (1724 kPA).

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Liebert® Challenger 3000™

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Contents Liebert Challenger 3000 with Liebert iCOM Page Table of Contents Split System Models Chilled Water ModelsR407C Refrigerant FiguresTables Important Safety Instructions Liebert Challenger Important Safety Instructions System Descriptions Water-Cooled Split SystemsProp Fan Air-Cooled Centrifugal Fan Air-CooledEquipment Handling Room PreparationEquipment Inspection Location ConsiderationsModel Lb. kg Unit net weightHandling With Skid Removal of SkidUpflow BU cabinet dimensions Floor Cutout Dimensions Piping connection size Piping ConsiderationsDrain Line Chilled Water Unit Connection Sizes-in Piping connections for air-cooled units Downflow modelsPiping connections for air-cooled units Upflow models Installation Applicable to all Models Condensate Pump Line 1/2 OD CU used only Installation Applicable to all Models Installation Applicable to all Models Installation Applicable to all Models Installation Applicable to all Models Humidifier Supply Water-Optional Infrared Facility Fluid and Piping MaintenanceElectrical Connections Terminal Block For Customer Connectons Downflow Models with Liebert iCOM Upflow Models with Liebert iCOMDucted Applications Plenum InstallationBalancing the Air Distribution Under-Floor Discharge SystemsChecklist for Completed Installation Low Voltage Condenser LocationLine Voltage 43-9/16 51-7/16 Common to all models. See below for key to a dimensionAir-cooled condenser statistics Liebert Lee-TempheaterRefrigerant Piping Condenser refrigerant per serial tag Recommended line sizes OD copper, inchesEquivalent lengths feet for various pipe fittings Variable Fan Speed Control Materials Supplied Fan Speed Control SystemsVariable Fan Speed Control Piping Variable Fan Speed Charging Fan speed suction pressure transducer settingsDPN000349 Rev DPN001726 Liebert Lee-Temp Controlled Materials Supplied Liebert Lee-Temp Leak Check and Evacuation ProcedureLiebert Lee-Temp Piping 407C Liebert Lee-Temp suction pressure transducer settingsLiebert Lee-TempCharging Factory Piping Optional Piping Field Piping DPN001725 Condenser Factory Piping Field Piping Factory Piping Water Regulating Valve AdjustmentControl Refrigerant control settings psi kPaMotorized Ball Valve-Digital Scroll Compressors Manual FlushingManual Control Control MethodStartup LocationPump and Drycooler Drycooler InstallationDrycooler Location General Guidelines Glycol PipingDry Bulb Wet Bulb Relative Dew Point Humidity Room dew point temperaturesPreparing the System for Filling Volume in standard Type L copper pipingFilling Instructions Expansion Tanks, Fluid Relief Valves and Other DevicesEthylene glycol concentrations Glycol SolutionsFilling the System 483mm 1097mm For expansion tank dimensions, see on43-3/16 43-9/16 110 5mm See Note 30-1/4Pump Pump Suction Pump Discharge Connection, Mounting hole dimensional dataDrycooler data Glycol pump dataField Piping General arrangement-Glycol-cooled models with digital scroll Expansion Tank Field-Installed at Pressure Motor Ball Valve-Digital Scroll Compressors Testing Valve FunctionGlycol Regulating Valve Chilled Water Models WAY Valve Water/Glycol-Cooled Condensing Units Air-Cooled Condensing UnitsRefrigerant Loop Model Lb kg Unit refrigerant chargeR407C Charge Line coupling sizes Line charges refrigerant per 100 ft m of Type L copper tubeRecommended refrigerant lines R407C sizes OD copper Quick Connect Fittings Outdoor Air-Cooled Condensing Units Unit Dimensions See TablePFCZ42A-L PFCZ41A-L See Table Outdoor air-cooled condensing unit-top air discharge models152 Piping and electrical connections top air discharge36-1/4 38-1/2 Ton High Ambient Ton Quiet-Line Field-supplied unit disconnect switchIndoor centrifugal condensing unit Installing the Indoor Condensing UnitModel Net Weight 60 Hz 50 Hz Lb kg MC40A MC39A Centrifugal Air-Cooled Condensing UnitsAirflow CFM CMH DuctingPiping Connections Mod Wire connections from evaporatorDPN000207 Rev0Ton centrifugal air-cooled condensing unit dimensional data AIR Cooled Water Cooled Condenser Water Requirements Water and Glycol-Cooled Condensing UnitsPiping Considerations Ton Connection SizesTon water/glycol-cooled condensing unit Glycol SystemsDPN000209 Ton water/glycol-cooled condensing unit dimensional data WATER/GLYCOL R407C Refrigerant Temperature Gauge Pressure Psig KPaExample Temperature Pressure Gauge Psig KPaCalculating Subcooling Page Care Ne tPpor t Is t Twor k
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3000 specifications

The Emerson 3000 is a cutting-edge control system designed to enhance the efficiency, reliability, and precision of industrial operations. Employed across various sectors such as oil and gas, pharmaceutical, food and beverage, and power generation, the Emerson 3000 has gained recognition for its robustness and versatility.

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