Friedrich Kuhl+ KEQ08A11A User Manual

43 PB
R-410A SEALED SYSTEM REPAIRS
WARNING
RISK OF ELECTRIC SHOCK
Unplug and/or disconnect all electrical power
to the unit before performing inspections,
maintenances or service.
Failure to do so could result in electric shock,
serious injury or death.
WARNING
HIGH PRESSURE HAZARD
Sealed Refrigeration System contains refrigerant
and oil under high pressure.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.
Failure to follow these procedures could
result in serious injury or death.
Refrigerant Charging
NOTE:Becausetherefrigerantsystemisasealedsystem,serviceprocesstubeswillhavetobeinstalled.First
installalinetapandremoverefrigerantfromsystem.Makenecessarysealedsystemrepairsandvacuumsystem.
Crimpprocesstubelineandsolderendshut.Donotleaveaservicevalveinthesealedsystem.
Properrefrigerantchargeisessentialtoproperunitoperation.Operatingaunitwithanimproperrefrigerant
chargewillresultinreducedperformance(capacity)and/orefciency.Accordingly,theuseofpropercharging
methodsduringservicingwillinsurethattheunitisfunctioningasdesignedandthatitscompressorwillnotbe
damaged.
Toomuchrefrigerant(overcharge)inthesystemisjustasbad(ifnotworse)thannotenoughrefrigerant
(undercharge).Theybothcanbethesourceofcertaincompressorfailuresiftheyremainuncorrectedforany
periodoftime.Quiteoften,otherproblems(suchaslowairowacrossevaporator,etc.)aremisdiagnosedas
refrigerantchargeproblems.Therefrigerantcircuitdiagnosischartwillassistyouinproperlydiagnosingthese
systems.
Anoverchargedunitwillattimesreturnliquidrefrigerant(slugging)backtothesuctionsideofthecompressor
eventuallycausingamechanicalfailurewithinthecompressor.Thismechanicalfailurecanmanifestitselfas
valvefailure,bearingfailure,and/orothermechanicalfailure.Thespecictypeoffailurewillbeinuencedbythe
amountofliquidbeingreturned,andthelengthoftimethesluggingcontinues.
Notenoughrefrigerant(undercharge)ontheotherhand,willcausethetemperatureofthesuctiongastoincrease
tothepointwhereitdoesnotprovidesufcientcoolingforthecompressormotor.Whenthisoccurs,themotor
windingtemperaturewillincreasecausingthemotortooverheatandpossiblycycleopenthecompressoroverload
protector.Continuedoverheatingofthemotorwindingsand/orcyclingoftheoverloadwilleventuallyleadto
compressormotororoverloadfailure.

Friedrich Kuhl+ KEQ08A11A Specifications

General

Brand	Friedrich
Model	Kuhl+ KEQ08A11A
Category	Air Conditioner
Language	English