Heat Controller R410A manual

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Table of contents for the manual

  • Page 1

    A PPLICATION & SERVICE GUIDE HFC Refrigerant R410a Used In GeoMax2 Geothermal Heat Pump Systems[...]

  • Page 2

    Page 2 R410a Application and Service Guide T able 1. R407c Pressur e/T emperature Chart Although the bulk of this manual is information regarding R410a, R407c will also be discussed for purposes of comparison and since it is one of the so- called new refrigerants. R410a Overview R410a is a non-chlorine based (HFC) refrigerant, that with R407c and R[...]

  • Page 3

    Page 3 R410a Application and Service Guide Component Considerations for R410a Compressor W all thickness has increased with the increase of operat- ing pressures of R410a. The internal pressure relief valve setting has been increased from 375-450 psig for R22 to 550-625 psig for R410a. Although the discharge pressure is higher in R410a the discharg[...]

  • Page 4

    Page 4 R410a Application and Service Guide • A vacuum pump will not adequately remove mois- ture from the POE lubricants. Use a  lter drier and replace whenever the system is opened. • POEʼ s can be irritating to the skin • POEʼ s can damage some roo ng membrane materi- als • POEʼ s are better solvents than mineral oils • Leave P[...]

  • Page 5

    Page 5 R410a Application and Service Guide • 35% annual leak rate of commercial and industrial refrigeration • 15% annual leak rate comfort cooling chillers and all other equipment R407c Considerations R407c equipment for leak detection are the same as R410a. However , the technician CANNOT use the exist- ing refrigerant in the system after lea[...]

  • Page 6

    Page 6 R410a Application and Service Guide An overcharged TXV unit can be identi ed by: • High subcooling • High head pressures Even though R410a has a very small fractionation po- tential it cannot be ignored completely when charging. T o avoid fractionation , charging a system with R410a should be done with LIQUID from the tank to maintain[...]

  • Page 7

    Page 7 R410a Application and Service Guide 4. Measure the suction line temperature just prior to entering the compressor . 5. Subtract the saturation temperature from the suc- tion temperature to  nd the superheat. Consult T able 4 for appropriate values. 6. If the superheat is too high then unit might still be undercharged. T XV 's will ma[...]

  • Page 8

    SAFETY AND HANDLING OVERVIEW ASHRAE Standard 15 details safety precautions when handling refrigerants in commercial systems and should be read and understood. Refrigerants are especially dan- gerous in con ned spaces. • R410a has a much higher pressure ( + 60%) associated with its operation . Use caution when handling and ensure proper tools a[...]

  • Page 9

    1900 Wellworth Ave., Jackson, Michigan 49203 • Ph. 517-787-2100 • Fax 517-787-9341 THE QUALITY LEADER IN CONDITIONING AIR www.heatcontroller.com 02 /07[...]