Ingersoll-Rand IRN250-300H-2S, IRN37-160K-CC, IRN50-200H-CC manual Water quality recommendations

Page 26

7.0 INSTALLATION

Water quality recommendations

Water quality recommendations Water quality is often overlooked when the cooling system of a water−cooled air compressor is examined. Water quality determines how effective the heat transfer rate, as well as the flow rate will remain during the life of the unit. It should

be noted that the quality of water used in any cooling system does not remain constant during the operation of the system. Evaporation, corrosion, chemical and temperature changes, aeration, scale and biological formations effect the water makeup. Most problems in a cooling system show up first in a reduction in the heat transfer rate, then in a reduced flow rate and finally with damage to the system.

Scale: Scale formation inhibits effective heat transfer, yet it does help prevent corrosion. Therefore, a thin uniform coating of calcium carbonate is desired on the inner surface. Perhaps the largest contributor to scale formation is the precipitation of calcium carbonate out of the water. This is dependent on temperature and pH. The higher the pH value, the greater the chance of scale formation. Scale can be controlled with water treatment.

Corrosion: In contrast to scale formation is the problem of corrosion. Chlorides cause problems because of their size and conductivity. Low pH levels promote corrosion, as well as high levels of dissolved oxygen.

Fouling: Biological and organic substances (slime) can also cause problems, but in elevated temperature environments such as cooling processes they are not a major concern. If they create problems with clogging, commercial shock treatment are available.

To ensure good operation life and performance of the compressor cooling system, the recommended acceptable ranges for different water constituents are included below:

Cooling Water Analysis Chart

Substances

Test interval

Acceptable

 

 

concentration

 

 

 

Corrosivity

Monthly - if stable

Langelier Index

(Hardness,

for 3 to 4 months,

0 to 1

pH, Total

analyse quarterly.

 

Dissolved Solids,

 

 

Temperature at

 

 

inlet Alkalinity)

 

 

Iron

Monthly

<2 ppm

Sulphate

Monthly

<50 ppm

 

 

 

Chloride

Monthly

<50 ppm

Nitrate

Monthly

<2 ppm

Silica

Monthly

< 100 ppm

 

 

 

Desolated

Daily - if stable,

0 ppm (as low

Oxygen

analyse weekly

as possible)

Oil & Grease

Monthly

<5 ppm

Ammonia

Monthly

<1 ppm

24IRN37 - 160K - CC & IRN50 - 200H -CC & IRN75 - 160K - 2S & IRN100 - 200H - 2S & IRN 250 - 300H - 2S

http://air.irco.com

Page 25 Page 27
Image 26
Page 25 Page 27
Contents Operation and Maintenance Manual AIR Compressor Group Bonded Warranty & Registered Start UP Contents Somer ForewordIf in Doubt Consult Supervision FOREWORD ERS Abbreviations & SymbolsEnergy recovery system F.CThis unit was purchased from Purchase Order DetailsRotary Screw AIR Compressor Compressed air SafetyGeneral Information Transport MaterialsAvoid INGESTION, Skin Contact Inhalation of Fumes ElectricalCondensate disposal Coolant disposalText Decals Discharge airLift here Rotation 39540257 RevCondensate Drain Electrical power inlet Safety Graphic Form and Meaning of ISO Symbols Prohibition / Mandatory Information / InstructionsDo not stand on any service valve or Safety Coolant Separator Pressure AIR Discharge Belt Tension Filter Motor Lubrication Ingersoll Rand Company Receipt / HandlingReceipt Unpacking and HandlingFor technical information see section InstallationLocation in Plant Ensure that the correct tie down points are usedInstallation Discharge and Condensate Piping Installation Electrical Example of voltage imbalance calculation Installation Very ImportantFuse Type Model Minimum cooling water requirement vs Range Adjusting the Aftercooler Trim ValveCooling Water Piping 50F 70FWater quality recommendations Psi Installation SEA Watercooled Units Selected Units onlyOrifice diameter in mm Outdoor Sheltered Installation General Information Technical INFORMATION-SINGLE StageSound pressure level dBA Minimum ambient temperature C F Weight Kg lbsCooling clean water flow l/min US 51/38 95/46 Flow at 7.5 Barg m3/minMax fuse size @ 440V − 480V a Cooling clean water flow l/min US 84/65 95/72Max fuse size @ 380V − 415V a Max fuse size @ 550V − 575V aN132K N160K N200H General Information Technical Information − TWO Stage 1690 5933Flow at 100 psig cfm 1100 1527Installation DRAWING−N37/45K−CC & N50/60H−CC − Air Cooled KEYInstallation DRAWING− N37/45K−CC & N50/60H−CC − Water Cooled Installation Drawing − N55/75K−CC & N75/100H−CC − Air Cooled Installation DRAWING−N55/75K−CC & N75/100H−CC−Water Cooled General Information General Information General Information General Information KEY 22381206 Revision B Equipment downstream of compressor 23128994 Revision a Stage onlyAir/coolant Coolant Condensate Cooling water W.C. only 22099006 Revision C General Information Process and Instrumentation Diagram N250−300H TWO Stage 22402135 Revision CPiping legend Wiring Schematic N37K − N45K-CC / N50-60h−cc a/c blower vfd Stop FDWires Numbers Function Wire colorWiring schematic n55-75k-cc / n75-100h-cc a/c Blower vfd Label DescriptionWires Numbers Function Wire color SS1-3Wiring schematic n37/45k-cc/n50/60h-cc w/c SgneColor Wiring schematic n55-75k-cc / n75-100h-cc W/c 23131345 Revision a4ATT SENSOR, Package AIR Discharge Temperature 4CTT Revision M Wiring schematic n75-160k-cc / n125-200h-cc A/c22093058 F10 SGNeWiring schematic n75-160k-cc / n125-200h-cc W/c Revision E4SV VALVE, Water Stop 6APT Wiring schematic n250-300H 380-480V SG-Ne4ATT SENSOR, Package AIR Discharge Temperature 6APT General Information General Description Operating Instructions Basic OperationStopping the machine in an emergency Intellisys Controls ArrowsDisplay Screen Main MenuCurrent Status Screen Current Status itemsMain Menu Ready to StartOperator Setpoints Default MIN MAX Step Unit Operator SetpointsCondensate Interval Options Selection MIN MAXSensor Calibration Scheduled startAlarm History Clock FunctionsEnergy Status Messages Service Warnings Initial Check AlarmsAlarms Alarm Main MenuMaintenance Ultra Coolant Maintenance Procedures Prior to attempting any maintenance work, ensure that− Prior to starting Coolant level checking procedure Adding coolantSeparator element change procedure Coolant filter change procedureSeparator element checking procedure Drain sequence for N250/300H−2SStart the compressor and check for leaks and coolant level Separator element change procedure for N250/ 300H−2SScavenge screen clean/check procedure Separator tank / Pressure systemAircooled Cooler Cleaning Air filter change procedureAir filter change procedure N250/300H−2S Blower motor Re−GreaseN50/100H N37/75K Coolant Coolers Watercooled Cooler CleaningHigh Airend Temperature Sensor checking procedure AftercoolerDrive Box Filter Removal / Replacement Blower / fan Motor Bearing Maintenance Stored unitsMotor cowl cleaning N75−160 units only Moisture Separator Check / CleaningFluid and Vibration Monitoring No Loss Drain Trap where fitted Check / CleaningCoolant Sampling Procedure Symptom Fault Remedy Fault FindingGeneral Faults Compressor will not No power supply to packageCheck and modify settings Or not sealing correctly With correct coolantRemove blockage, repair or replace damaged See aboveWith coolant’ Fault Cause Remedy Pressure transducerIndicated on the INTELhYS Controller Drive FaultsFault Cause Action
Top Page Image Contents