Gomco 270 Manual

INDEX
to GENERALINFORMATiON
2.0SPECIFICATIONS
3.0SET-UP
4.0OPERATINGPROCEDURE
5.0OPERATINGPRINCIPLE
6.0MAINTENANCEANDSERVICE
7.0ILLUSTRATIONS
8.0 TROUBLESHOOTING
9.0REPLACEMENTPARTS LIST

1.0GENERAL INFORMATION:
1.1Purpose:
Gomco Models270and2701areportabledrainagepumpsdesignedtoassuregentle
suctionforspecialized uses asgastriclavage,abdominaldecompression,doudenal
andfistuladrainagefollowingprostatectomy.Thesuctionsystemincludestwopreset
drainagelevelsof90mmand120mmofmercuryvacuum.
1.2 Features — Model 270:
Supplied with model270asstandardequipmentare:
1.One(1)1200mlglasscollectioncontainer with overflowprotectioncap
assembly.
2. One(1)wireformed bottle holder.
3. Bacteria filter topreventfluidandaerosolcontamination.
4. Onedisposabletubing pacltage containing2-six foot iengthsofclearflexible
PVC tubing.
5. Compact case with lightedselectorswitch,pumpcycle light andhospitalgrade
plug.
1.2.1 Overflow Protection:
The1200mlcoiiection bottle assemblysupplied with thispumpincludesa cap
and float assembly(See Illustration No.4).Whencollectedpatientfluidsreacha
predetermined level, thevacuumsupplytothecollection bottle isshutoffbythe
cap andfloat.
1.2.2 Bacteria Fiiter:
Thehighefficiencybacteria filter iscustomengineeredtopreventfluidand
aerosoi contaminationofportablesuction units. This filter featuresa
hydrophobic,microporousmembranewhichfiltersair with maximumefficiency
(0.3micronparticlesinair),while blocl^ing the floW ofaqueousfluidsand
aerosoi contaminants.TheGomcohighefficiency fiiter protectsagainstsuction
pumpcontaminationinthe case ofcanisteroverflowasithelpspreventthe
overflowfromreachingthepump.
1.3 Features — iViodel 2701:
Supplied with modei2701asstandardequipmentare:
1.One1100mldisposablecollectioncontainer with overflowprotectioncap.
2. Onewireformedcontainerholder.
3. Bacteria filter.
4. Onedisposabletubing paci<age containing2-six foot lengthsofclearflexible
PVC tubing.
5. Compact case with lightedselectorswitch,pumpcycle light andhospita!grade
plug.
1.3.1 Overfiow protection:
The1100mldisposablecollectioncontainersupplied with thispumpincludesa
multi-stage filter (1)hydrophobicmembranestopsflowofaqueoussolutions
(actsasoverflowprotection),(2)giassprefilterallows filter tohandlemost
laser/electrocautery applications.
1.3.2 Bacteria Fiiter:
Thehighefficiencybacteria filter iscustomengineeredtopreventfluidand
aerosol contaminationofportablesuctionunits.This filter featuresa
hydrophobic,microporousmembranewhichfiltersair with maximumefficiency
(0.3micronparticlesinair),while bloci^ing theflowofaqueous flujds and
aerosol contaminants.TheGomcohighefficiency filter protectsagainstsuction
pumpcontaminationinthe case ofcanisteroverflowasithelpspreventthe
overfiov\( fromreachingthepump. '"\

2.0SPECIFICATIONS:
2.1Vacuum:
*At90mmsetting:90mmto99mmHg.
at120mmsetting:120mmto132mmHg.
2.2 Flow Rate (Air):
At90mmsetting:.25iiters/minute
At120mmsetting:.30liters/minute
2.3Electrical Requirements:
115 volts50/60Hz.(1.5ampsmax.)
230volts50/60Hz.(1.3ampsmax.)
2.4PumpCylinder:
155 to160 OHMS resistance
2.5Dimensions:
Case Only - (D)8"x (w)8"x (H)7"
Overall -(D)8"x (V\/) 11"x (H)7"
2.6 Weight:
Shipping -15 pounds
Net- 10pounds
2.7 Duty:
Continuous
* NOTE; Vacuumshouldbemeasuredafterthepumphasbeenrunningfor15minutestonormalizethe
pumpcylindertemperature.
3.0SET-UP:
3.1Collection Bottle Assembly — Glass Bottle:
(See IllustrationNo.4)
1.Checkthebottietopedgesfornicks.Ifthebottletopisnicked,itwillnot seal.
2. Check that thecapgasketIsproperlypositionedinsidethecover.
3. Check that thefloatmovesfreely.
4. Screwthecoverassemblysecurelyontothebottle,makingsure that thegasket
seals.
5. Place thebottleassemblyintothewireformbottleholder.
6.Connectonelengthoftubing,enclosedinthetubingpackage,tothebacteria
filter andtothevertical fitting onthebottlecapandfloatassembiymarked"to
pump".
7.Connecttheotherlengthoftubingtothelongbentmetaltubeofthecap
assembly.
3.2Collection Bottle Assembly— DCU:
1. Makesure filter shut-offisinplaceinundersideoflid.
2. Place bottleona flat surfaceandlaycapassemblyonbottle. Push downoncap
tosnaplidtobottle.
3. Place bottleintowireformbottleholder.
4. Connectonelengthof tubing.-enclosed inthetubingpackage,tothebacteria
filter andtothevertical fitting ofthecapmarkedvacuum.
5. Connect't'he otherlengthoftubingtotheelbow marked "patient".

4.0OPERATINGPROCEDURE:
{SeeIllustrationNo.3)
1. Tiie selectorswitclistiouidbeinthecenter"off"position.
2. Plug thelinecordintoa groundedelectricaloutlet,makingsure that itisthesame
voltageasindicatedonthe unit nameplate.
3. Besurethecollectionbottleisassembledproperly,see 3,0, and that thelengthoftub-
ingfromthebottletothebacteria filter isdry.
4. Push theselectorswitchonthe front controlpaneltothedesiredvacuumrange,upfor
120mmHganddownfor90mmHg.Theredlightwithintheswitchwillremainlitin-
dicatingthe unit ison.
5. Duringoperation,theamber"pump cycle" lampwillblinkintermittentlytoindicatethe
intermittent pumpingaction.Afterfourorfiveminutesofoperation,theselected
vacuum leveiwillbereached.
6.Priortousingyourpumpona patient,insurethevacuumbysubmergingtheendofthe
patienttubeintoa containerofwater.Aspirationofwaterintothecollectionbottle
should benoticed.
7.Thepumpisnowreadyforuse.
8.Duringpatientuse,thelevelofthecollectedcontentswithinthecollectionbottle
should befrequentlycheckedandemptied.
5.0OPERATING PRINCIPLE:
The mildnegativepressureofthis unit isinducedbytheexpansionandcontractionofair
withinanairtightcylinder.Theexpansionandcontractionoftheairinthecylinderis con-
trolledbypressureandsuctionvalvesanda solidstatetimingdevicetoproducea mild suc-
tion.Containedwithintheair tight pumpcylinderisa heatingelementwound with a
resistance wire.Duringthe"on"time120voltsisappliedtotheheatingelementfora period
of2 to3.5 seconds, dependingupontheselectedvacuumrange,controlledbythesolidstate
timer.Theresistancewireheatstheairwithinthecylinderandexpandedairisexpelledinto
atmospherethroughthepressure(check)valve.Theamberpumpcyclelampinthe front con-
trol panel(SeeIllustrationNo.3)islitduringthistime.Duringthe"off"time,voltagetothe
heatingelementisinterruptedbythesolidstatetimerfora periodof19to22 seconds. The
pressure valve closes duringthisperiodandtheremainingair.withinthecylindercoolsand
contractscausinga partialvacuumwhichopensthesuction(check)valve.Airfromwithinthe
collectionbottleisdrawnintothecylinderto fill thevacuum.Duringthis"off"time,theamber
pumpcyclelampinthe front controlpanelremainsoffandthisiswhensuctionactuallyoccurs.
6.0 IVIAINTENANCE ANDSERVICE
6.1Pump:
The pumpofthis unit hasnomovingpartsandthereforerequiresnomaintenance.Inthe
eventfloodingofthepumpoccurs,theelementinthepumpcylinderandthevalveswill
need replacing.Attemptingtocontinuetoruna floodedpumpmaycausedamagetothe
controlcircuit.
6.2PumpCylinder Replacement:
1.Disconnectthe unit fromItspowersource.
2. Removethe case topcoverbyremovingthefourselftappingscrews.
3. Disconnectthevalveandmanifoldassemblyfromthecylindertubingconnector.
4. Removethepowercordgroundwirefromthe case groundscrew.
5. Removethecylindergroundwirefromthegroundscrew.
6.Removethe two cylindermountingscrewsfromthebottomsideofthe case.
7.Unsolderthetwocylmderwiresatthecylindercoverterminals anjd remove.
8. Installthenewcylinderinreverseorder.

ToAtmosphere
Air Tight
Cylinder
Pressure(Check)
Valve
Suction(Check)
Valve
BacteriaFilter
SUCTION SYSTEM Collection
Bottle

6.2.1 Element Replacement (SeeIllustrationNo.6)
1.Removepumpcylinderasdescribed In 6.2.
2. Removethesixslottedheadmachinescrewsfasteningthecylindercovertothe
cylinder.
3. Taptheedgeofthepumpcover with a piasticmallettobreakitfree.
4. Liftthecoveroff with heatingelementattached.
5. Removethetwoeiementleadsrunning thru thecoverterminalsbyunsoldering
themfromthetopsideofthecover.Pry-upthetwosmalltabssecuringthewire
totheterminals.Thecenterterminalholesshouldbeclearofsolder.
6.Loosenthehexnutlockingtheelementrodtothecoverandunscrewtheelement
fromthecover.
7.Screwthenewelementintocovercenterholeapproximatelyflush with thetop
surface ofthecover.Tightentheelementlocknutagainstcover.
8. Pass thetwoelementleads thru thecoverterminalsandwindeachleadaround
thesmallterminaltabsandbendbothtabsdowntosecurethewires.Solderthe
twoleadsandsolderclosedthecenterterminalholes.
9. Checkresistancetomakesureofpropercontact — 155to160 OHMS.
10. Piace gaskettothesealsurfaceofthecylinder.Applya smalldropofRTV
sealant ontopsideofthecylindercoveratthecenterelementrodholeto
preventanyleaks.
11. Inserttheelementintothecylinderandplacethecoverontothecylinderwhile
aligningscrewholes.Replacethesixcovermountingscrewsandtighten.Note—
care mustbetakenwhenhandlingtheelementandcoverassemblytoprevent
damage tothefragileelement.
12. Installcylinderasdescribedinpumpcylinder replacement—6.2.
6.3SuctionandPressureValves:
The checkvalvesusedinthis unit arefactory sealed, thereforerequirenomaintenance
(See IllustrationNo.8)
6.3.1SuctionandPressure Valve Replacement:
1.Disconnectthe unit fromitspowersource.
2. Removethe case topcoverbyremovingthefourselftappingscrews.
3. Disconnectthewhitesiliconerubbertubingfromthepumpcylindertubing
connector.
4. Disconnecttherubbertubingfromthesuctionvalve.
5. Unscrewbothvalvesfromthevalvemanifold.
6.Lightlylubricatethethreadsofthenewvalves with petroleumjellyor
equivalentandscrewthevalvesintothemanifold. Note: Care mustbetaken
whenreplacingvalvestopreventthreaddamageduetocrossthreadingand
overtightening.Valvesshouldonlybeinstalledfinger tight.
7.Installthevalveandmanifoldassemblyinreverseorder.
6.4 Bacteria Filter:
The bacteria filter shouldbereplacedafteronemonthofpatientuseorwhena reduction
oftheairflowrateisnoticed.Itmustbereplacedintheeventfluidshaveenteredit,such
as incollectionbottleoverflow.

6.4.1 Bacteria Filler Repiacement:
1.Unscrewthe filter fromthevacuumand filter connection(See Illustration
No. 1 orNo.2)byhandturningina counter-cloci<wise direction.
2. Screwa new filter into thevacuumand filter connectionbyturningina
clockwise directionfinger tight.
Note: Care mustbetakenwhenreplacingthe filter topreventthread
damageduetocrossthreadingandovertightening.
6,5GlassCollection Bottle andCapAssembly Steriiization:
1.Removethecapassemblyfromthebottle.
2. Disposeofdrainagefluidsandmaterialsinthebottle.
3. Soak the bottle andcapassemblyina warmdetergentsolution.Washallthe
parts with a nylonbristlebrush,rinsethoroughly with waterandaerate.
4. Autoclaveat250°F for15minutesfollowingtheautoclavemanufacturer'srecom-
mendedprocedure.
Caution: Donotflashautoclavetheglasscollectionbottle.Ifdesired,sterilize with
ethyleneoxidegas.Followmanufacturer'sdirectionforrecommendedprocedure.
6.6 Control Circuit:
Thepumpcyclesarecontrolledbya solidstateprintedcircuitboard(See Illustration No.7)
Shts. 1 thru 5 forschematicandparts list) orTimer(See Illustration No,7A).
Thetimingisfactorysetandneedsnoadjustment.
Control Circuit Description (PN-2311) Illustration No.7
TheSF120A-774isanOn/Offrecyclingtimerwhichprovidesa fixed"Off"timeof19to22
seconds anda selectable"On"timeofeither3.4to3.75secondsor2.1to2.25 seconds.
The2.1to2.25second"On"timecanbeselectedbyshortingterminals4 and5 together.
Whenpowerisapplied,the"On"timeoccurs first.
A 9Vpowersupplyissuppliedby Dl, Rl, C6,C7, 08, and Zl. 07 and 08 areusedforhigh
frequencynoisefiltering.C6isthe filter capacitorfortheVz wavevoltagesupplied
throughD1,and Rl. Zl istheregulatingzenerdiode.
Thecircuittimingisaccomplishedbyusinga MC14541programmabletimer,IC1.ThisIC
has a built inoscillatorchipwhosetimingcomponentsareconnectedbetweenpins1,2,
and3.Thepin3 connectionusedisdeterminedby 102, a MC4016 bilateralswitch.The sec-
tionsofthisswitch that areturnedon,determinethetimingcomponentswhichare used.
Duringthe"Off"timeinterval,P3,R7, Rll, and 02 comprisethetimingcomponents.
These areselectedbya highsignalonpin6 of 102.
Thelonger"On"timetimingcomponentsareP2,R6, R12, andC3.Theseareselectedbya
highsignalonpin12of 102, Whena shorter"On"timeisdesired,P2,andR6areparallel
byP1andR5byapplyinga highsignalonpin13of 102. Since "On"timeisrelativelyshort,
resistorR14,a zeroOHMresistor,isconnectedbetweenpin5 ofIC2andcommonduring
test.Thispreventsthetimerfromgoing into the"Off"time until both"On"timeshave
been calibrated.Thisresistoristhenremoved.
The output ofthetimer Is connectedthrougha full wavebridge,BR1,andSCR. 01. The
gatedivetotheSCRiscontrolledby R2. Q2,R4,andpin8 of ICI. Whenpin8 islow,tran-
sistorQ2isoff.andgatecurrentto Ql issuppliedto 01 viaR2.ThetimeristhenInthe
"On" state.Whenpin8 of 101 ishigh,transistor Q2 Is "On",shortingthegatecurrentof
Ql tocommon.Thisprovidesthe"Off" time.
IC1isprogrammedbytheconnectionofpin12and13eithera highorlowstate.Forthis
circuittheICisprogrammedtodividetheoscillatorfrequencyby1024. Since theQ output
of1C1willchangestateinonehalfof that numberofcounts,thenumberof512isusedto
calculatetheoscillatorfrequency.Therefore,theoscillatorfrequencymeasuredatpin1 of
ICI shouldbe24.98Hzforthe"Off"time,143.22Hzforthelong"On" time, and227.56Hz
for theshort"On"time.

6.6.1ControlCircuitSpecifications:
1.Modeofoperation— continuousOn-Offrecyciing witti powerappiiedtothe
inputterminals.Theloadisenergizedduringthe"On"timeperiod(SeeIl-
lustrationNo.7).
2. Input voltage— 120Volts± 15%,50/60Hz.
3. TimeDelays—
4. Load160 OHMS resistive.
AT120 MM SETTING
AT 90MM SETTING
ON TIME 3.4to3.75sec. 2.1to2.25sec.
OFF TIME
19 to 22sec.
19 to22sec.
6,6.2 ControlCircuit Replacement:
1.Disconnectthe unit fromitspowersource.
2. Removethe case topcoverbyremovingthefourselftappingscrews.
3. DisconnectallthewiresfromtheP.C.boardbypullingoffthe quicl< connect
terminals(Donot pull onwires. Mal^e sureyouhavea firm holdontheter-
minal).
4. RemovethetwoP.C.boardmountingscrewsfromthebottomsideofthe
case.
5. InstallthenewP.C.boardinreverseorder.(SeeIllustrationNo.1 forwiring
detail.)
6.NOTE:On10/18/04theP.C.boardwasreplaced with a encapsulatedcircuit pacl<age.
To installtheencapsulatedcircuitpackage,installonemountingscrewintoanexisting
mountingholeInthebottom side ofthe case, connectallwirestothepropercircuit
package terminals(SeeIllustrationsNo.2 forwiringdetail).
7.0ILLUSTRATIONS
No. 1 - FinalAssembly& WiringDetail w/RC. BD.
No. 2 - FinalAssembly& WiringDetail w/Tlmer
No. 3 - Front Panel Assembly
No. 4 - CollectionBottleAssembly
No. 5 - DCU
No. 6 - PumpCylinderAssembly
No. 7 - ControlCircuit(P.C.BD.)
No. 7A- ControlCircuit(Timer)
No. 8 - ValveandManifoldAssembly