Repair
Repair Repair
Repair
Repairingthisequipmentrequiresaccesstoparts
thatmaycauseelectricshockorotherserious
injuryifworkisnotperformedproperly.Besureto
shutoffallpowertoequipmentbeforerepairing.
Before Before
Before
Beginning Beginning
Beginning
Repair Repair
Repair
NOTICE NOTICE
NOTICE
Propersystemsetup,startup,andshutdown
proceduresarecriticaltoelectricalequipment
reliability.Thefollowingproceduresensuresteady
voltage.Failuretofollowtheseprocedureswill
causevoltageuctuationsthatcandamage
electricalequipmentandvoidthewarranty.
1.Flushifnecessary.SeeFlushing,page48.
2.SeeShutdown,page46.
Flush Flush
Flush
Inlet Inlet
Inlet
Strainer Strainer
Strainer
Screen Screen
Screen
Theinletstrainerslteroutparticlesthatcanplugthe
pumpinletcheckvalves.Inspectthescreensdailyas
partofthestartuproutine,andcleanasrequired.
Isocyanatecancrystallizefrommoisture
contaminationorfromfreezing.Ifthechemicalsused
arecleanandproperstorage,transfer,andoperating
proceduresarefollowed,thereshouldbeminimal
contaminationoftheA-sidescreen.
Note
CleantheA-sidescreenonlyduring
dailystartup.Thisminimizesmoisture
contaminationbyimmediatelyushing
outanyisocyanateresidueatthestartof
dispensingoperations.
1.Closetheuidinletvalveonthey-strainerinlet
andshutofftheappropriatefeedpump.This
preventsmaterialfrombeingpumpedwhile
cleaningthescreen.
2.Placeacontainerunderthestrainerbasetocatch
drainoffwhenremovingthestrainerplug(C).
3.Removethescreen(A)fromthestrainer
manifold.Thoroughlyushthescreenwith
compatiblesolventandshakeitdry.Inspectthe
screen.Nomorethan25%ofthemeshshould
berestricted.Ifmorethan25%ofthemeshis
blocked,replacethescreen.Inspecttheo—ring
(B)andreplaceasrequired.
4.Ensurethepipeplug(D)isscrewedintothe
strainerplug(C).Installthestrainerplugwiththe
screen(A)ando—ring(B)inplaceandtighten.
Donotovertighten.Letthegasketmaketheseal.
5.Opentheuidinletvalve,ensurethatthereare
noleaks,andwipetheequipmentclean.Proceed
withoperation.
333024S 49