Emerson 3000 installation manual Refrigerant Piping, Recommended line sizes OD copper inches

Page 31

Air-Cooled Models—Self-Contained Compressor

3.3Refrigerant Piping

All refrigeration piping should be installed with high temperature brazed joints. Prevailing good refrigeration practices should be employed for piping supports, leak testing, dehydration and charg- ing of the refrigeration circuits.

Unit refrigeration components and piping are shipped from the factory with a nitrogen holding charge.

NOTICE

Risk of improper installation. Can cause equipment and property damage.

The refrigeration piping should be isolated from the building by the use of vibration isolating supports.

When installing field piping, care must be taken to protect all refrigerant lines from the atmosphere, especially when using refrigerants with POE oils. Do not allow the piping to stand open to air for more than 15 minutes. Units designed for R407C have a compressor that contains POE oil that is very hygroscopic; that is, it quickly absorbs water from the air. The longer the compressor piping is left open to air, the harder it will be to fully evacuate. If left open too long, the POE oil may need to be replaced before achieving the required vacuum level.

Keep the evaporator unit and condenser closed with their factory charge of dry nitrogen while all field piping is installed. Keep the field piping clean and dry during installation, and do not allow it to stand open to the atmosphere. When all the field interconnecting piping is in place, vent the condenser dry nitrogen charge and connect to the field piping. Finally, vent the evaporator unit dry nitrogen charge and make its piping connections last.

Follow all proper brazing practices including a dry nitrogen purge to maintain system cleanliness.

NOTE

Piping, including inverted trap(s), must be routed to allow unobstructed access to the panel per the NEC.

Traps should be installed in the hot gas line on vertical risers at the base and every 25 feet (7.6 meters) in elevation. These traps will collect condensed refrigerant and refrigerant oil during the off cycle of the unit and ensure flow of refrigerant oil during operation.

A check valve is factory-supplied with the unit to be field-installed on the discharge side of the scroll compressor. Be sure to install the check valve with the refrigerant flow in the proper direction. When soldering or brazing the valve, it is very important to protect the internal parts by wrapping the valve with a damp cloth to keep the valve temperature below 250°F (121°C).

Approval is required whenever:

•a refrigerant piping run exceeds 150 ft. (46 m) equivalent length

•an R407C system condenser must be located below the level of the cooling coil.

Total discharge line pressure drop must not exceed 10 PSIG (69 kPa).

Consult your local Liebert representative when considering installations outside these guidelines.

Table 5

Recommended line sizes — OD copper (inches)*

 

 

 

 

 

 

 

 

 

3.5-ton 042A (040A)

5-ton 067A (065A)

Equivalent Length

Hot Gas Line

Liquid Line

Hot Gas Line

Liquid Line

50 ft. (15 m)

5/8

1/2

7/8

1/2

100 ft. (30 m)

3/4

1/2

7/8

5/8

150 ft. (45 m)

3/4

5/8

7/8

5/8

*Recommended vertical line sizes must be used for proper oil return at all cooling and dehumidification steps.

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Contents Liebert Challenger 3000 with iCOM Page Table of Contents Split System Models Chilled Water ModelsR407C Refrigerant Figures Tables Important Safety Instructions Page 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 Drain Line Piping ConsiderationsPiping connection size 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 Electrical Connections Facility Fluid and Piping MaintenanceHumidifier Supply Water-Optional Infrared Terminal Block for customer connections Downflow Models with Liebert iCOM Upflow Models with Liebert iCOMDucted Applications Plenum InstallationBalancing the Air Distribution Under-Floor Discharge SystemsChecklist for Completed Installation Line Voltage Condenser LocationLow Voltage Air-cooled condenser statistics Recommended line sizes OD copper inches Refrigerant PipingIndoor unit refrigerant charge lb kg Fan Speed Control SystemsVariable Fan Speed Control Piping Equivalent lengths feet for various pipe fittingsVariable Fan Speed Control Materials Supplied Variable Fan Speed Charging Fan speed suction pressure transducer settingsFactory Piping Field Piping Factory Piping Liebert Lee-Temp Piping Lee-Temp Leak Check and Evacuation ProcedureLiebert Lee-Temp Controlled Materials Supplied 407C Lee-Temp suction pressure transducer settingsLee-Temp Charging Lee-Temp Receiver Refrigerant LevelFactory Piping Optional Piping Pressure Relief Condenser Factory Piping Field Piping Factory Piping Field Piping Water Regulating Valve AdjustmentControl Refrigerant control settings psi kPaMotorized Ball Valve-Digital Scroll Compressors Manual FlushingLocation StartupManual Control Drycooler Location Drycooler InstallationPump and Drycooler 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 DevicesGlycol Solutions Ethylene glycol concentrations Filling the System@ 50F 10C 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 Field Piping Factorypiping Field Piping Glycol Regulating Valve Testing Valve FunctionMotor Ball Valve-Digital Scroll Compressors Chilled Water Models WAY Valve Water/Glycol-Cooled Condensing Units Air-Cooled Condensing UnitsRefrigerant Loop Line charges refrigerant per 100 ft m of Type L copper tube Unit refrigerant chargeRecommended refrigerant lines R407C sizes OD copper Line coupling sizes Quick Connect FittingsModel Line Size Coupling Torque Tons OD Cu, Lb-ft Outdoor Air-Cooled Condensing Units Unit Dimensions See TablePFCZ42A-L PFCZ41A-L See Table Outdoor air-cooled condensing unit-top air discharge models36-1/4 38-1/2 Piping and electrical connections top air discharge152 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 Regulating Valve Water and Glycol-Cooled Condensing UnitsPiping Considerations Condenser Water RequirementsTon water/glycol-cooled condensing unit Glycol Systems24V GND Ton water/glycol-cooled condensing unit dimensional data WATER/GLYCOL R407C Refrigerant Temperature Gauge Pressure Psig KPaCalculating Subcooling Temperature Pressure Gauge Psig KPaExample R407C Refrigerant R407C Refrigerant Page Te r Ys t Ne tIti Ti n That
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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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