7
PURONR(R--410A)QUICKREFERENCE GUIDE
SPuron refrigerant operates at 50--70 percent higher pressu res than R--22.B e sure that servicing equipment an d replacement
componentsare designedto operate withPuron
SPuronrefrigerantcylinders are rosecolored.
SRecoverycylinder servicepressurerating must be 400 psig,DOT 4BA400 or DOT BW400.
SPuronsystems should becharged with liquidrefrigerant. Usea commercialtype metering devicein the manifold hose when
charging into suction line with compressor operating
SManifoldsets shouldbe 700 psig high side and 180 psiglow side with 550 psig low--sideretard.
SUsehoses with 700 psig servicepressure rating.
SLeakdetectorsshould be designed to detectHFC refrigerant.
SPuron, as with other HFCs, is only compatible with POE oils.
SVacuumpumps willnot remove moisture from oil.
SDo not use liquid--linefilter driers with rated work ing pressures less than 600 psig.
SDo not leave Puron suction line filter driers in line longer than72 hours.
SDo not install a suction--linefilter drier in liquid line.
SPOEoils absorb moisturerapidly. Do notexpose oil to atmosphere.
SPOE oils may cause damage to certain plastics and roofing materials.
SWrapall filter driers and service valves with wet cloth w hen brazing.
SAfacto ry approved liquid--line filterd rieris requ ired on every unit.
SDoNOT use an R--22TXV.
SIfindoor unit is equippedwith an R--22TXV or piston meteringdevice, it mustbe changed to a hard shutoffPuron TXV.
SNeveropen system to atmospherewhile it is under a vacuum.
SWhen system must be opened for service, recover refrigerant, evacuate then break v acuum with dry nitrogen and replace filter
driers.Evacuateto 500 microns prior torecharging.
SDonot vent Puron into the atmosphere.
SDo not use capillary tube coils.
SObserveall warnings,cautions,andboldtext.
SAllindoor coils mustbe installed witha hard shutoff Puron TXV meteringdevice.
25HCB3 / 25HCC5