Napoleon 13 SEER Installation And Operating Instructions Manual - page 19
19
IOM
W415-1395 / C / 06.26.2017
11. SYSTEM CHARGE ADJUSTMENT
REFRIGERANT CHARGING MUST ONLY BE ATTEMPTED BY QUALIFIED CONTRACTORS. IMPROP-
ER SYSTEM CHARGE CAN REDUCE SYSTEM CAPACITY AND MAY CAUSE EQUIPMENT DAMAGE.
WARNING
!
!
DO NOT LEAVE THE SYSTEM OPEN TO THE ATMOSPHERE. DO NOT ATTEMPT TO PUMP “TOTAL
SYSTEM CHARGE” INTO OUTDOOR UNIT FOR MAINTENANCE, SERVICE, ETC. THIS MAY CAUSE
DAMAGE TO THE COMPRESSOR AND/OR OTHER COMPONENTS. THE OUTDOOR UNIT ONLY HAS
ENOUGH VOLUME FOR THE “FACTORY CHARGE”, NOT FOR THE “TOTAL SYSTEM CHARGE”. IT IS
UNLAWFUL TO KNOWINGLY VENT, RELEASE OR DISCHARGE REFRIGERANT INTO THE OPEN AIR
DURING REPAIR, SERVICE, MAINTENANCE, OR THE FINAL DISPOSAL OF THIS UNIT.
WARNING
!
!
Allairconditioningunitscomepre-chargedwithenoughrefrigerant(R410A)foranappropriatelymatched
indoorevaporatorcoil.Forfieldinstalledlineset,acorrectionof0.6OzofR410Aperfootoflinesetisrequired
for3/4”suctionlinediameterand0.7OzofR410Aperfootoflinesetisrequiredfor7/8”suctionlinediameter.
Liquidlineshallbe3/8”diameter.Usingevaporatorcoilsthathavenotbeenapprovedasamatchbythe
manufacturerisnotrecommended.RefertoAHRIdirectoryformatchedevaporatorcoilforyoursystem.
Thesystemchargeshallbeadjustedaccordingtosection11.2or11.3dependingontheapplication.
ToobtainanefficientsystemmatchingAHRIperformance,unitswitheitherthermostaticexpansion
valvesorpistonflowratersmustbeinstalledintheverticaldirectionwiththeliquidrefrigerantflowing
downwardsorupwards,feedingtheindoorevaporatorcoil.Thecapillarytubesandexpansionvalve
locationcanbeadjustedtoensurethattheflowthroughbothoftheslabsoftheA-Coilhaveequalflow
ofrefrigerant.Ifthetemperaturedifferencedoesnotvarymorethan10°Fbetweenthetwoslabsof
A-coil,itindicatestheequalflowofrefrigerantthroughtheeachoftheslabs.
NOTE
11.1 SYSTEM TOTAL CHARGE
11.2 ADJUSTING SYSTEM CHARGE FOR SYSTEMS USING THERMOSTATIC
EXPANSION VALVES
Procedure:
1 Connectcharginghosefromliquidportontherefrigerantbottletochargingserviceporton
manifoldgauge.
2 Openrefrigerantbottleandpurgehose.
3 Connectlowsideofmanifoldgaugesettothepressureportonvaporlineservicevalve.
4 Connectthehighsideofthemanifoldgaugesettopressureportonliquidlineservicevalve.
5. Temporarilyinstallatemperaturemeasuringdeviceontheliquidlineneartheliquidservice
valveandoneatthevaporlinenearthevaporservicevalve.Ensurethatthetemperature
measuringdevicemakesadequatecontactandinsulatedforaccuratereadings.
6 Operatethesystemforatleast10minutes.
7. Checksubcoolingandsuperheat.Systemsusingthermostaticexpansionvalvesshouldhave
asubcoolingof7°Fto9°Fandsuperheatof7°Fto9°F.
8 RecordTotalChargeonthenameplateandmanual.