Galletti LEW CS/CL 244 [52/56] Operating limits

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Page52of56

RG66006951‐Rev.01

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5 Operatinglimits

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ThisparagraphreportsalistofoperatinglimitsfortheLEWchillersrelatingtothewateroutlettemperatureonthe

utilitysideandwaterinlettemperatureatthedissipationexchanger.ApplicationswithwaterTexceedingthelimits

indicatedtheymustrunwithR134arefrigerant(availableuponrequest).Youcancontactyo

urlocalAgentforrelated

details.

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OperatingrangeofLEWunitsincoolingmodeandheatpumpmode:

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Watercanbeproducedattemperaturesbelow5°C(upto‐10°C)usingglycolsolutions.Thislowersthefreezingpointas

showninthefollowingtable:

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Minimumtemperatureof

producedwater

5°C 2°C ‐1°C ‐5°C ‐10°C

Percentageinweightof

ethyleneglycol

0% 10% 15% 25% 30%

Freezingtemperatureof

mixture

0°C‐4°C ‐ 8°C ‐14°C ‐18°C

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If the water produced is below 0°C, a special insulation needs to be applied to the cold pipes to prevent ice from

forming.Thisiswhyapplicationswithtemperaturesproducedbelow0°Cmustbeconsideredasspecialapplications.

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Theusefulheadsuppliedbythepump,atthesamevolumetricwaterflo

w,dependsontheglycolpercentageasshown

inthefollowingtable:

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Percentageinweightof

ethyleneglycol

0% 10% 15% 25% 30%

Reductionpercentageof

usefulflowrate

0%‐5% ‐8% ‐12% ‐15%

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Performancelossofthethermodynamiccircuitisnegligibleuptoconcentrationsof30%glycol,inweight.

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