Emerson 3000 installation manual Lee-Temp Charging, Lee-Temp Receiver Refrigerant Level, 407C

Page 38

Air-Cooled Models—Self-Contained Compressor

6.After four hours, check the pressure readings and, if they have not changed, break vacuum with dry nitrogen. Pull a second and third vacuum to 250 microns or less. Recheck the pressure after two hours.

7.Remove the jumper hose installed previously from between the service valve fitting and the condenser. After completing this step, proceed to Lee-Temp Charging.

Lee-Temp 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.

! CAUTION

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. The charging function operates the compressor at full capacity and energizes the blower motor and liquid line solenoid valve. The reheat and humidifier are disabled. A minimum 20psig (138kPa) must established and maintained for the compressor to operate. The charging function can be reset as many times as required to complete unit charging.

Table 11 Lee-Temp suction pressure transducer settings

 

 

R-407C

 

 

 

 

 

Gauge Reading

 

 

 

(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

50 (345)

 

65 (448)

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 (2.2 kg) 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.

Lee-Temp Receiver Refrigerant Level

On each receiver at the condenser are two refrigerant-level sight glasses. Refrigerant level will vary with outside temperature. Check refrigerant level after the unit has been on for at least 15 minutes.

Sight Glass Levels

40°F (4.5°C) and lower—bottom sight glass is 3/4 full 40 to 60°F (4.5 to 15.5°C)—bottom sight glass is full 60°F (15.5°C) and higher—top sight glass is 3/4 full.

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Contents Liebert Challenger 3000 with iCOM Page Table of Contents R407C Refrigerant Chilled Water ModelsSplit System Models Figures Tables Important Safety Instructions Page System Descriptions Centrifugal Fan Air-Cooled Split SystemsProp Fan Air-Cooled Water-CooledLocation Considerations Room PreparationEquipment Inspection Equipment HandlingRemoval of Skid Unit net weightHandling With Skid Model Lb kgUpflow BU cabinet dimensions Floor Cutout Dimensions Piping connection size Piping ConsiderationsDrain Line Piping Outlet Locations Piping connections for air-cooled units Upflow models Installation Applicable to all Models Installation Applicable to all Models 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 connections Upflow Models with Liebert iCOM Downflow Models with Liebert iCOMUnder-Floor Discharge Systems Plenum InstallationBalancing the Air Distribution Ducted ApplicationsChecklist for Completed Installation Low Voltage Condenser LocationLine Voltage Air-cooled condenser statistics Refrigerant Piping Recommended line sizes OD copper inchesEquivalent lengths feet for various pipe fittings Fan Speed Control SystemsVariable Fan Speed Control Piping Indoor unit refrigerant charge lb kgVariable Fan Speed Control Materials Supplied Fan speed suction pressure transducer settings Variable Fan Speed ChargingFactory Piping Field Piping Factory Piping Liebert Lee-Temp Controlled Materials Supplied Lee-Temp Leak Check and Evacuation ProcedureLiebert Lee-Temp Piping Lee-Temp Receiver Refrigerant Level Lee-Temp suction pressure transducer settingsLee-Temp Charging 407CFactory Piping Optional Piping Pressure Relief Condenser Factory Piping Field Piping Factory Piping Field Piping Adjustment Water Regulating ValveManual Flushing Refrigerant control settings psi kPaMotorized Ball Valve-Digital Scroll Compressors ControlManual Control StartupLocation Pump and Drycooler Drycooler InstallationDrycooler Location Glycol Piping General GuidelinesRoom dew point temperatures Dry Bulb Wet Bulb Relative Dew Point HumidityExpansion Tanks, Fluid Relief Valves and Other Devices Volume in standard Type L copper pipingFilling Instructions Preparing the System for FillingGlycol Solutions @ 50F 10C Filling the SystemEthylene glycol concentrations See Note 30-1/4 For expansion tank dimensions, see on43-3/16 43-9/16 110 5mm 483mm 1097mmGlycol pump data Mounting hole dimensional dataDrycooler data Pump Pump Suction Pump Discharge ConnectionField Piping General arrangement-Glycol-cooled models with digital scroll Field Piping Factorypiping Field Piping Motor Ball Valve-Digital Scroll Compressors Testing Valve FunctionGlycol Regulating Valve Chilled Water Models WAY Valve Air-Cooled Condensing Units Water/Glycol-Cooled Condensing UnitsRefrigerant Loop Recommended refrigerant lines R407C sizes OD copper Unit refrigerant chargeLine charges refrigerant per 100 ft m of Type L copper tube Model Line Size Coupling Torque Tons OD Cu, Lb-ft Quick Connect FittingsLine coupling sizes Unit Dimensions See Table Outdoor Air-Cooled Condensing UnitsPFCZ42A-L PFCZ41A-L Outdoor air-cooled condensing unit-top air discharge models See Table152 Piping and electrical connections top air discharge36-1/4 38-1/2 Field-supplied unit disconnect switch Ton High Ambient Ton Quiet-LineCentrifugal Air-Cooled Condensing Units Installing the Indoor Condensing UnitModel Net Weight 60 Hz 50 Hz Lb kg MC40A MC39A Indoor centrifugal condensing unitDucting Airflow CFM CMHPiping Connections Rev0 Wire connections from evaporatorDPN000207 ModTon centrifugal air-cooled condensing unit dimensional data AIR Cooled Water Cooled Condenser Water Requirements Water and Glycol-Cooled Condensing UnitsPiping Considerations Regulating ValveGlycol Systems Ton water/glycol-cooled condensing unit24V GND Ton water/glycol-cooled condensing unit dimensional data WATER/GLYCOL Temperature Gauge Pressure Psig KPa R407C RefrigerantExample Temperature Pressure Gauge Psig KPaCalculating Subcooling R407C Refrigerant R407C Refrigerant Page That Ne tIti Ti n Te r Ys t
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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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