GE JGP989 How to use

C
C
PUB # 31-9080 06/01
MODEL SERIES:
JGP989
TECHNICAL SERVICE GUIDE
GE Consumer Home Services Training
Profile
Gas-on-Glass
Cooktop

IMPORTANT SAFETY NOTICE
The information in this service guide is intended for use by
individuals possessing adequate backgrounds of electrical, elec-
tronic, and mechanical experience. Any attempt to repair a major
appliance may result in personal injury and property damage. The
manufacturer or seller cannot be responsible for the interpretation
of this information, nor can it assume any liability in connection
with its use.
WARNING
If the information in this manual is not followed exactly, a fire or
explosion may result causing property damage, personal injury or
death. If you smell gas:
- Do not try to light any appliance.
- Do not touch any electrical switch; do not use any phone in
the building.
- Immediately call the gas supplier from a neighbor’s phone.
Follow the gas supplier’s instructions.
- If you cannot reach the gas supplier, call the fire department.
WARNING
To avoid personal injury, disconnect power before servicing
this product. If electrical power is required for diagnosis or test
purposes, disconnect the power immediately after performing the
necessary checks.
RECONNECT ALL GROUNDING DEVICES
If grounding wires, screws, straps, clips, nuts, or washers
used to complete a path to ground are removed for service, they
must be returned to their original position and properly fastened.
GE Consumer Home Services Training
Technical Service Guide
Copyright © 2001
All rights reserved. This service guide may not be reproduced in whole or in
part in any form without written permission from the General Electric Company.
!

– 1 –
TableofContents
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
ConversiontoLP(Propane)Gas . . . . . . . . . . . . . . . . . . . . . . . 4
Specifications and Nomenclature5 . . . . . . . . . . . . . . . . . . . . . . 8
WarrantyInformation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Cooktop Features and Controls. . . . . . . . . . . . . . . . . . . . . . . . 10
MechanicalDisassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Component andConnectorLocator Views . . . . . . . . . . . . . . . . . . 21
Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
[[Title]]

– 2 –
Introduction
ThenewProfileGas-on-GlassDowndraftModel
cooktopsmakeaneloquentstatementofstyle,
convenience,andkitchenplanningflexibility.
Whetherchosenforitspurityofdesign,attention
todetail,orbothofthesereasons–you’llfindthese
downdraftgascooktops’superiorblendofform
andfunctionwillbeadelightforyearstocome.
Thesecooktopscontainseveralnewfeatures,
suchasglasscooktopsurfaces,sealedburners,
anda400-CFMdowndraftventingsystem.
Theinformationonthefollowingpageswillhelp
youservicethesecooktopseffectivelyand
efficiently.

– 3 –
Installation
WARNING:Beforebeginningtheinstallation,
switchpoweroffattheservicepanelandlockthe
servicedisconnectingmeans.Whentheservice
disconnectingmeanscannotbelocked,securely
fastenawarningtagtotheservicepanel.
BeforeYouBegin...
Note: The complete installation instructions
areinclosedwiththe UseandCareManual .
Carefully read and follow these instructions.
30-in.CooktopDimensions
Dimensionsforreferenceonly.
Unitshownfullyassembled.
Unitmustbeventedtotheoutside!
Never reuse old flexible
connectors. The use
of old flexible connectors
can cause gas leaks
and personal injury.
Always use NEW
flexible connectors
when installing a
gas appliance.
20
5
⁄ 8 ″
Cutout
20
5
⁄ 8 ″
Cutout
20
5
⁄ 8 ″
Cutout
6″Min.
Min.
Electrical
outlet:
12″ above
cabinet
floor
Electrical
outlet:
12″ above
cabinet
floor
Pressure
regulator
Pressure
regulator
Pressure
regulator
Electrical
outlet:
12″ above
cabinet
floor
6″Min.
Shut-off
valve
Shut-off
valve
Shut-off
valve
″Pipe
1
⁄ 2 ″Pipe
1
⁄ 2 ″Pipe
Electrical
cord
42″ long
Electrical
cord
42″ long
Electrical
cord
42″ long
Solid Pipe Connection Solid Pipe Connection with Elbow
Union
Elbow
Union
Flexible Connection
GasSupply
Thesecooktopsaredesignedtooperateonnatural
gasat4in.ofwatercolumnpressureoronLPgas
at10in.ofwatercolumnpressure.Forproper
operation,themaximuminletpressuretothe
regulatormustbenomorethan10in.of water
columnpressurefornaturalgasand14in.of
watercolumnpressureforLPgas.
GasSupplyShutoff Valve
Thecooktopitselfisnotequippedwithagasshut-
offvalve.Ifinstalledcorrectly,ashutoffvalvewillbe
inthemaingassupplyline“upstream”ofthe
appliancepressureregulator.
MeasuringtheGasPressure
SuppliedtotheBurners
Connectthetubingsuppliedwithamanometer
overoneendofthemanometer.Removeaburner
capandheadfromtheapplianceandplacethe
otherendofthetubingovertheburnerorifice.Turn
onthegastotheorificeyouaretestingandlightat
leastoneotherburnertoserveasaload.
21
7
⁄ 8 ″
20
1
⁄ 2 ″
19″
6″Dia.
29
7
⁄ 8 ″
6″
28
3
⁄ 4 ″
6”
1/2

– 4 –
PartsIncluded
PART QUANTITY
Brass orifices 4
Stick-on rating label 1
Installation instructions 1
GasSupply
Withtheinstallationofthisconversionkit,the
cooktopshouldoperateonLPgasat10in.of
watercolumnpressure.
Thepressureregulatormustbeconnectedin
serieswiththemanifoldofthecooktopandmust
remaininserieswiththesupplyline.Forproper
operation,themaximuminletpressuretothe
regulatormustbenomorethan14in.water
columnpressureforLPgas.
Whencheckingtheregulator,theinletpressure
mustbeatleast1in.greaterthantheregulator
outputsetting.Iftheregulatorissetfor10in.of
watercolumnpressure,theinletpressuremustbe
atleast11in.
Note:Disconnectthecooktopandtheindividual
shutoffvalvefromthegassupplypipingsystem
duringanypressuretestingofthatsystemattest
pressuresgreaterthan1/2psig.Isolatethe
cooktopfromthegassupplypipingsystemby
closingtheindividualmanualshutoffvalvetothe
cooktopduringanypressuretestingofthegas
supplypipingsystemattestpressuresequaltoor
greaterthan1/2psig.
ConversiontoLP(Propane)Gas
Note:Beforeyou begin, readthese
instructions completely and carefully.
Thecooktopisfactorysetfornaturalgas
operation.To useLP(propane)gas,theregulator
andburnerorificesmustbeconverted.TheLP
orificespudsforthecooktopburnerscanbe
locatedwithintheliteraturepackageshippedwith
theunit.
IfyouconverttoLPgas,keepinstructionsand
naturalgasorificestoconvertbackforusewith
naturalgas.
Productfailureduetoimproperinstallationisnot
coveredundertheGEAppliancesWarranty.
WARNING:IfyouareusingLP(propane)gas,all
adjustmentsdescribedinthefollowingstepsmust
bemadebeforeattemptingburneradjustmentsor
usingthecooktop.
WARNING: Thisconversionkitshallbeinstalled
byaqualifiedserviceagencyinaccordancewith
themanufacturer’sinstructionsandallapplicable
codesandrequirementsoftheauthorityhaving
jurisdiction.Iftheinformationintheseinstructions
is notfollowedexactly, afire,explosion,or
productionofcarbonmonoxidemayresult,
causingpropertydamage,personalinjury, or loss
oflife.Thequalifiedserviceagencyisresponsible
fortheproperinstallationofthiskit.Theinstallation
isnotproperandcompleteuntiltheoperationof
theconvertedapplianceischeckedasspecifiedin
themanufacturer’sinstructionssuppliedwiththe
kit.
ToolsYouWillNeed
Adjustable wrench 9/32″(7 mm) Nutdriver T15 Torx driver
Small, thin-blade flat screwdriver with approximately 1/8″
blade width is needed to access the calibration screw.

– 5 –
L
L
84
84
L
L
71
99
LP (Propane) Gas 10″W.C.P.
Burner Output Rating in BTU/HR
Location BTUs Orifice Size
LF, LR 8,500 0.84 Lmm
RR 5,500 0.71 Lmm
RF 11,000 0.99 Lmm
Front
Caution:Whenattachingtheburnerbasetothe
glasstopunit,tightento12in./lbsmaxtorque.
Overtighteningwillcausedamage.
4.Replacethegaskets,burnerbases,and
electrodes.Installthe2screwsineachburner
base.Donotovertighten.Themaximumtorque
is10in./lbs.Pushtheignitersallthewaydown
intotheburnerhead.
5.Installtheburnerheads,burnercaps,and
gratesintheiroriginalburnerpositions.
ConvertthePressureRegulator
1.Locatethepressureregulatorundertherearof
thecooktop.
Pressure
regulator
2.Removethenutfromthepressureregulator
withanadjustablewrench.
Natural gas
LP gas
Nut
TurnOFFGasandElectricSupply
Beforeyoubegin,turnOFFthegassupplyatthe
shut-offvalve.Disconnecttheelectricalsupply
fromthecooktop.
Shut-off valve
Electrical supply
ConvertSurface Burners
1.Firstremove,convert,andreplacetheleft-side
surfaceburnersandthentheright-sidesurface
burners.Removethegrates,burnercaps,and
burnerheads.Removethescrewssecuringthe
burnerbasestotheburners.Pulloutthe
electrodeswithoutremovingtheelectrodeleads.
Grate
Brass
locator foot
Burner cap
Electrode
Burner base
Burner head
Burner
base
screw (2)
2.Removethebrassorificespudinthechimney
ofeachburnerusinga9/32-in.(7mm)nutdriver.
Note:TheLPorificesareshorterthanthenatural
gasorifices.
3.InstalltheLPorificespudsintheircorrect
positionsbynumber.
Note:Foroperationatelevationsabove5000 ft.(1500 m),
equipmentratingsshall bereducedat arateof 2%foreach
1000ft.(300m)above sealevelbefore selecting
appropriatelysizedequipment,i.e.,usesmallerorifices.

– 6 –
3.Removetheplasticpinfromtheinsideofthe
nut,turnthepin180degreesandsnapthepin
backintothenut.
Natural gas LP gas
Nut
4.Reinstallthenutontotheregulator.
5.ApplytheLPconversionlabelnexttotherating
plate.
TestforLeaks
WARNING:Donot useaflametocheckforleaks!
Donot usethecooktopuntilallconnectionshave
beenleaktested.
Performleaktestperthefollowinginstructions:
1.Purchasealiquidleakdetectororpreparea
soapsolutionofonepartwater,onepartliquid
detergent.
2.Whenallconnectionshavebeenmade,make
sureallcooktopcontrolsareturnedtoOFFand
turnthegassupplyvalvetoON.
3.Applytheliquidleakdetectororthesoapsolu-
tionaroundallconnectionsfromtheshutoff
valvetothecooktop.
4.Aleakisidentifiedbyaflowofbubblesfromthe
areaoftheleak.
5.Ifaleakisdetected,turnthegassupplyoff.
Tightenthefitting.TurnthegasONandtest
again.Iftheleakpersists,turnthegassupply
OFFandcontactyourdealerforassistance.
Donot attempttooperatethecooktopifaleak
ispresent.
Check Ignition
1.Connectelectricalsupplycord.
2.Pushdownonecontrolknobandturntothe
LITEposition.Theigniterwillsparkandthe
burnerwilllight.Thefirsttestmayrequiresome
timewhileairisflushedoutofthegasline.
3.Checktodetermineifyourburnerflamesare
normal.IfburnerflameslooklikeA,callfor
service.Normalburnerflamesshouldlooklike
BorC,dependingonthetypeofgasyouuse.
WithLPgas,someyellowtippingonouter
conesisnormal.
A–Yellow flames
Call for service
B–Yellow tips
Normal for
LP gas
C–Soft blue flames
Normal for
natural gas
4.TurntheknobtoOFF.
5.Repeattheprocedureforeachburner.
AdjustingLowFlame(Simmer)Setting
WARNING: Thefollowingadjustmentsmustbe
madebeforeturningontheburner.Failuretodoso
couldresultinseriousinjury.Besurepressure
regulatorhasbeenconverted.
Note:Thetopburnervalveshavelowflame/
simmeradjustmentscrewsinthecenterofthe
controlshafts.Aflashlightmaybeneededto
locatethescrew. Asmallthin-bladescrewdriver
(approximately1/8-in.bladewidth)isneededto
accessthe screw.
1. Light2otherburnersandsettheknobstoa
MEDIUMtoHIsetting.
2. Lighttheburnertobeadjustedandturnthe
knobtoLOW.
3. Removetheknobandinsertascrewdriverinto
thevalveshaft.
4. Turntheadjustmentscrewuntiltheflame

– 7 –
reachesthedesiredsize.
5. Performaflamestabilitytestwiththedowndraft
fanonHIGH.
FlameAdjustments
Note:Theburnersdonothaveairshuttersadjust-
mentsandusenonadjustableorifices.Ifthe
flameliftsofftheburner,orifyouexperience
yellow-tippedflamesand/orsootintheflames,
besuretocheckthefollowing:
1. Gaspressure:4-in.W.C.P.(natural)and10-in.
W.C.P.(LP).
2. Inspectorificetobesureitisdrilledinthe
centerandfreeofdebrisorburrs.
3. Besurethecorrectsizeorificeisintheproper
location.
4. Makesurethecooktopwasproperlyconverted
ifonLP.
5. Ifthecauseofsootingcannotbefoundinthe
abovechecks,replacetheorificewithone
havingasmallerdiameteropening.
TestingFlameStability
1. WiththedowndraftventfanonHI,turnthe
burnerknobfromHItoLOWquickly.Ifthe LOW
flamegoesout,increasetheflamesizeand
testagain.
2. WiththeburnerontheLOWsetting,openand
closethecabinetdoorunderthecooktop.Ifthe
flameisextinguishedbytheaircurrentscre-
atedbythedoormovement,increasetheflame
heightandtestagain.
FlameRecheck
Aftertheadjustmentismade,turnallburnersOFF.
Igniteeachburnerindividually.Observetheflame
attheHIposition.RotatethevalvetotheLOW
positionandbesuretheflamesizedecreasesas
thevalveisrotatedcounterclockwise.
Note:Oncetheconversioniscompleteand
checkedOK,fillouttheLPstickerandinclude
yourname,organization,anddateconversionwas
made.Applythestickernearthecooktopgasinlet
openingtoalertothersinthefuturethatthis
appliancehasbeenconvertedtoLP.Ifconverting
backtonaturalgasfromLP,pleaseremovethe
stickersoothersknowtheapplianceissettouse
naturalgas.
ConvertingBacktoNaturalGas
ReversetheprocedureforconvertingtoLP,
locatingtheorificesasfollows:
N
N
150
150
N
N
122
169
Front
Natural Gas 4″W.C.P.
Burner Output Rating in BTU/HR
Location BTUs Orifice Size
LF, LR 9,100 1.50 Nmm
RR 5,500 1.22 Nmm
RF 11,500 1.69 Nmm
Note:Foroperationatelevationsabove5000ft.
(1500m),equipmentratingsshallbereducedata
rateof2%foreach1000ft.(300m)abovesea
levelbeforeselectingaproximatelysized
equipment,ie.,usesmallerorifices.

– 8 –
Specifications and Nomenclature
ModelNumber
SerialNumber
Thefirsttwocharactersoftheserialnumber
identifythemonthandyearofmanufacture.
Example: AA123456S=January,2001
A-JAN 2005-H
D - FEB 2004-G
F-MAR 2003-F
G -APR 2002-D
H-MAY 2001-A
L-JUN 2000-Z
M-JUL 1999-V
R -AUG 1998-T
S - SEP 1997-S
T - OCT 1996-R
V-NOV 1995-M
Z- DEC 1994-L
Theletterdesignatingthe
yearrepeatsevery12
years.
Example:
T-1974
T-1986
T-1998
J G P 9 8 9 B C B B
Product
J=GECookingProduct
Features
G=Gas
Configuration
P=Cooktop FeaturePack
Designatesfeatures–thehigher
thenumber,themorefeatures.
Color
BB=BlackonBlack
WW=Whiteon White
CC=BisqueonBisque
YearModelCreated
C=2000
ColorFamily
B=Black
T = TrueWhite
K = TrueBisque
Theserialplateofyourcooktopislocatedon
thebottomoftheburnerbox.Inadditionto
themodelandserialnumbers,ittellsyouthe
ratingsoftheburnersandthetypeoffuel
andpressurethecooktopwasadjustedfor
whenitleftthefactory.
ForburnerBTUrateandorificesize,refertothe
ConversiontoLP(Propane)Gas chapter.
Thedowndraftventingsystemblowerisratedat400CFM.