6
2.4Fluid
The R407c is a zeotropic mixture (a fluid with more than one component). It is chemically
stable,possessesgoodthermodynamicproprietiesanditpresents itselfasacoolantwithlow
impactontheenvironmentandreducedtoxicity.
2.5Tubing
It is essential that the tubing have cooling qualities, both in the suction and in the fluid li ne
(feeding).Itisalsorecommendableforallthetubingtohavea highqualitythermalisolationto
avoidpotentialcondensation.
Thetubingdiametervariesaccordingtothesystemmodel,asshownon
thefollowingtable.
TubingDimensions
Model SuctionLine FluidLine
SolarBlock4/Eco750/Eco1000 5/8’’ 1/2’’
SolarBlock6/Eco1500 3/4’’ 1/2’’
SolarBlock8/Eco200 3/4’’ 1/2’’
SolarBlock12/Eco3000 7/8’’ 1/2’’
SolarBlock16/Eco1500 7/8’’ 3/4’’
SolarBlock24/Eco4000 1’’1/8 3/4’’
SolarBlock32/Eco5000 1’’1/8 7/8’’
SolarBlock40/Eco6000 1’’3/8 7/8’’
3.0PanelInstallation
3.1Maximumdistance
The maximum distance between
panels and the Thermody namic Block
is 20 meters, however if should there
be a bigger distance the eventual
losses generated by the length of the
tubingcanbereducedwiththecorrect
calculation of the thermal isolation
used and by adjusting the tubes
diameters.
Fluid R407c
MolecularMassKg/Kmol 86.2
Boilingtemperatureat1.013barºC ‐43.28
CriticaltemperatureºC 86.2
Latentheatuponevaporationat25ºCkJ/kg 250
Criticalpressurebar 54.5
Fireresistant
Max.H=15
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