Graco EcoQuip - Page 15

Operation
13.TurntheselectorvalvetoFILL.
NOTE: NOTE:
NOTE:
Thewaterpumpshouldbegincycling.If
not,openthepotpressureregulatorenoughto
causethepumptorunat60cpm.
NOTE: NOTE:
NOTE:
Theautovent/purgevalvewillallowall
oftheairtrappedinthetopofthepottovent.
Whenairstopsventing,thepotpressuregauge
willstarttoregisterpressure.
14.Waitforpotpressuretoincrease.
NOTE: NOTE:
NOTE:
Itcantakeuptoseveralminutesforthe
pottopressurize.
ti24824a
NOTE: NOTE:
NOTE:
Thepop-upcannotbepusheddown
unlessallofthepressureinthepotisreleased
byopeningthedumpvalve.
15.Setthepotpressure30psi(2.0Bar,0.2MPa)
higherthantheintendedblastpressure.Open
andclosethedumpvalveafterthepumpstalls.
Relievepotpressureto40psi(2.7Bar,0.27
MPa)beforeclosingthedumpvalve.Repeat
untilpotpressureisconsistent.
16.TurntheselectorvalvetoWASH.
17.Settheblastairpressure30psi(2.0Bar,0.2
MPa)lowerthanthepotpressurewhileblasting.
NOTE: NOTE:
NOTE:
Inordertoadjusttheblastpressure,
theblastcontrolswitchmustbeengaged.For
theinitialsetting,leavetheabrasiveballvalve
closed.
NOTE: NOTE:
NOTE:
Engageandreleasetheblastcontrol
switcheachtimetheblastregulatorisadjusted.
18.TurntheselectorvalvetoBLAST.
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