Daikin Enfinity VFC - TYPICAL REFRIGERATION CYCLES

tyPiCal refrigeration CyCles
Figure 35: Cooling Mode
Return Air
ReversingValve
Conditioned Air
(Cooling)
Thermal
ExpansionValve
CoaxialHeat
Exchanger
Blower
Coil–
Air to
Refrigerant
Heat
Exchanger
WaterIn
WaterOut
SensingBulb
and
CapillaryTube
Compressor
Cooling Refrigeration Cycle
WhenthewallthermostatiscallingforCOOLING,thereversingvalvedirectstheowoftherefrigerant,ahotgas,
leavingthecompressor,tothewater-to-refrigerantheatexchanger.Heretheheatisremovedbythewaterandthe
hotgascondensestobecomealiquid.Theliquidthenowsthroughathermalexpansionmeteringsystemtothe
air-to-refrigerantheatexchangercoil.Theliquidthenevaporatesbecomingagas,atthesametimeabsorbingheat
andcoolingtheairpassingoverthesurfacesofthecoil.Therefrigerantthenowsasalowpressuregasthroughthe
reversingvalveandbacktothesuctionsideofthecompressortocompletethecycle.
Figure 36: Heating Mode
Return Air
Thermal
ExpansionValve
CoaxialHeat
Exchanger
ReversingValve
Conditioned Air
(Heating)
Blower
WaterIn
WaterOut
SensingBulb
and
CapillaryTube
Compressor
Coil–
Air to
Refrigerant
Heat
Exchanger
Heating Refrigeration Cycle
WhenthewallthermostatiscallingforHEATING,thereversingvalvedirectstheowoftherefrigerant,ahotgas,
leavingthecompressor,totheair-to-refrigerantheatexchangercoil.Heretheheatisremovedbytheairpassing
overthesurfacesofthecoilandthehotgascondensestobecomealiquid.Theliquidthenowsthroughacapillary
thermalexpansionmeteringsystemtothewater-to-refrigerantheatexchanger.Theliquidthenevaporatesbecominga
gas,atthesametimeabsorbingheatandcoolingthewater.Therefrigerantthenowsasalowpressuregasthrough
thereversingvalveandbacktothesuctionsideofthecompressortocompletethecycle.
www.DaikinApplied.com 37 EnnityVerticalWaterSourceHeatPumps• IM 930-6