Howe 2000-RLE - Evacuation; Field Wiring

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10
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FieldInstallation
Evacuation
Donotusetherefrigerationcompressorto
evacuatethesystem.Donotstartthe
compressorwhileitisinavacuum.
Agood,deepvacuumpumpshouldbe
connectedtoboththelowandhighside
evacuationvalveswithcoppertubeorhigh
vacuumhoses(1/4”IDminimum).
Ifthecompressor
hasservicevalves,they
shouldremainclosed.
Adeepvacuumgaugecapableofregistering
pressureinmicronsshouldbeattachedtothe
systemforpressurereadings.
Ashutoffvalvebetweenthegaugeconnection
andvacuumpumpshouldbeprovidedtoallow
thesystempressuretobecheckedafter
evacuation.
Donotturnoffvacuumpumpwhenconnected
toanevacuatedsystembeforeclosingshutoff
valve.
Thevacuumpumpshouldbeoperateduntila
pressureof1,500micronsabsolutepressureis
reached–atwhichtimethevacuumshouldbe
brokenwiththerefrigeranttobeusedinthe
system
throughadrieruntilthesystem
pressurerisesabove“0”psig.
Refrigerantusedduringevacuationcannotbe
vented.Reclaimallusedrefrigerant.
Repeatthisoperationasecondtime.
Openthecompressorservicevalvesand
evacuatetheentiresystemto500microns
absolutepressure.Raisethepressureto2psig
with
therefrigerantandremovethevacuum
pump.
FieldWiring
Allfieldwiringmustbeincompliancewithlocal
andnationalcodes.Useonlycopper
conductorsoftheappropriatesize.
1. Installdisconnect(notsuppliedby
factory).
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2. Connect208‐230/1/60powertothe
twoblackwiresmarked“L1”and“L2”
inthejunctionboxontherearofthe
IceFlaker.
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3. Inthejunctionboxtherearetwored
wiresmarked“A”and“B”.Remove
wirenut.
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4. Connectthenormally‐openisolating
contactsfromtherelaymountedinthe
condensingunitto“A”and“B”.
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5. LocateandconnectPhotoEyesensors
tothematchingplug
insidetheIce
Flakerenclosure(seep.24).
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