A SERVICE OF

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Inallcases,motorsaredesignedforoperating
voltagesplusorminus10%ofthenormalrating
(seeSPECIFICATIONS).
1.Verifythevoltageandfrequencyattheoutlet
matchthespecicationsonthepumpmotor
decal.VerifytheON/OFFswitchisinthe
OFFpositionbeforeyouplugthepump
intoanoutlet.Verifythegasballastvalveis
closed.Removeanddiscardtheexhaustplug
fromtheendofthepump’shandle.
2.Thepumpisshippedwithoutoilinthe
reservoir.Beforestartingthepump,llwith
oil.RemovetheOILFILLcap(blackplastic
plugdirectlyinfrontofthehandle),andadd
oiluntiltheoiljustshowsinthebottomofthe
sightglass.Theapproximateoilcapacityof
thepumpis375milliliters.
3.ReplacetheOILFILLcapandremovethecap
fromoneoftheinletports.TurntheIso-Valve
toOPEN.TurnthemotorswitchON.When
thepumprunssmoothly,turntheIso-Valve
toCLOSEDandreplacethecapontheinlet
port.Thismaytakefromtwoto30seconds,
dependingontheambienttemperature.After
thepumprunsforapproximatelyoneminute,
checkthesightglassforcorrectoillevel—
oilshouldbeevenwiththesightglassOIL
LEVELline.Addmoreoilifnecessary.
Whenthepumpisrunning,theoillevel
shouldbeevenwiththelineonthesight
glass.Underllingwillresultinpoorvacuum
performance.Overllingcanresultinoil
blowingfromtheexhaust.
Yourpumpisnowreadytoevacuateair
conditioningandrefrigerationsystems.Follow
normalserviceproceduresandtheA/C-R
manufacturer’sinstructionsforconnectionstothe
system.
Before using your vacuum pump
Operating Manual
4
Emerson MotorsGeneral Electric Motors
CAUTION! Before connecting the vacuum pump
to an A/C-R system, remove refrigerant from the
system in an accepted manner. Damage to the
pump may occur if evacuation is started while
the system is under high pressure. Robinair
recommends use of our Refrigerant Recovery
and Recycling equipment.
Wiring Instructions:
Thisvacuumpumpfeaturesdualvoltageranges.
Beforeoperatingthepump,readandfollowthese
rewiringinstructions(ifnecessary)tobesureyour
pumpiswiredfortheappropriatevoltage.
CAUTION! Unplug the unit before
beginning any service work. Incorrect
use or connections can cause electrical
shock. Only qualied personnel should
perform service work.
Thisvacuumpumpisfactorywiredforahigh
voltagerangeof220to250volts.Towirethe
switchforalowvoltagerangeof110voltsto115
volts,followthesesteps:
1.
DisconnecttheunitfromtheACpowersource.
2.Loosenthescrewsontheplateattherearof
themotor,andcarefullymovetheplateaside
tocleartheopening.
3.Disconnecttheleadsandreconnectforlow
voltage,followingthediagramandchart.
(Highvoltageconnectionsarealsoshownif
youwanttorewireinthefuture.)
4.Verifyconnectionsaresecureandthere
arenoshortcircuits.Verifythegrounding
connectoriscorrectlyconnected.
5.Re-installtheplateontherearofmotorwith
thescrewswhichwereloosenedinStep2.
IMPORTANT: Checkforshortcircuitsusinga
continuitytesterbeforereconnectingtotheAC
powersource.
— EMERSON —
INTERNAL VOLTAGE CONNECTION
MOTOR LOW HIGH
LEAD VOLTAGE VOLTAGE
BROWN 3 6
WHITE 4 3
BLACK 2 3
INST0350
NOTE: EXTERNAL POWER LEADS ARE ALWAYS
CONNECTED TO TERMINALS 1 AND 4.