Friedrich Kuhl+ KEQ08A11A User Manual

47 PB
R-410A SEALED SYSTEM REPAIRS
Sealed System Method of Charging/ Repairs
BURN HAZARD
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with a torch.
Failure to follow these procedures could
result in moderate or serious injury.
WARNING
FREEZE HAZARD
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with liquid refrigerant.
Failure to follow these procedures could
result in minor to moderate injury.
CAUTION
TheacceptablemethodforchargingthesealedsystemistheWeighedinChargeMethod.Theweighedincharge
methodisapplicabletoallunits.Itisthepreferredmethodtouse,asitisthemostaccurate.
Theweighedinmethodshouldalwaysbeusedwheneverachargeisremovedfromaunitsuchasforaleak
repair,compressorreplacement,orwhenthereisnorefrigerantchargeleftintheunit.Tochargebythismethod,
requiresthefollowingsteps:
1. Installapiercingvalvetoremoverefrigerantfromthesealedsystem.(Piercingvalvemustberemovedfrom
thesystembeforerecharging.)
2. RecoverRefrigerantinaccordancewithEPAregulations.
3. Installaprocesstubetosealedsystem.
4. Makenecessaryrepairstosystem.
5. Evacuatesystemto200micronsorless.
6. WeighinrefrigerantwiththepropertyquantityofR-410Arefrigerant.
7. Startunit,andverifyperformance.
8. Crimptheprocesstubeandsoldertheendshut.
COMPONENT TESTING
Hermetic Components Check
Metering Device - Capillary Tube Systems
Allunitsareequippedwithcapillarytubemeteringdevices.Checkingforrestrictedcapillarytubes.
1. Connectpressuregaugestounit.
2. Starttheunitinthecoolingmode.Ifafterafewminutesofoperationthepressuresarenormal,thecheckvalveandthe
coolingcapillaryarenotrestricted.
3. Switchtheunittotheheatingmodeandobservethegaugereadingsafterafewminutesrunningtime.Ifthesystem
pressureislowerthannormal,theheatingcapillaryisrestricted.
4. Iftheoperatingpressuresarelowerthannormalinboththeheatingandcoolingmode,thecoolingcapillaryisrestricted.
COOLING MODE
Inthecoolingmodeofoperation,liquidrefrigerantfromcondenser(liquidline)entersthecoolingcheckvalveforcingthe
heatingcheckvalveshut.Theliquidrefrigerantisdirectedintotheliquiddryerafterwhichtherefrigerantismeteredthrough
coolingcapillarytubestoevaporator.(Note:liquidrefrigerantwillalsobedirectedthroughtheheatingcapillarytubesina
continuousloopduringthecoolingmode).

Friedrich Kuhl+ KEQ08A11A Specifications

General

Brand	Friedrich
Model	Kuhl+ KEQ08A11A
Category	Air Conditioner
Language	English