Bunn OT Instruction and safety manual

S6161-CF-FSE-010
0910-LP-108-9799 REVISION 2
TECHNICAL MANUAL
FOR
COFFEE BREWER, MODELS OT AND RT
DESCRIPTION, OPERATION AND MAINTENANCE
Supersedure Notice: This manual supersedes
S6161-CF-FSE-010, Revision 1, dated 15 November 2000
and all changes thereto.
“Distribution Statement “A”: Approved for public release;
distribution is unlimited.”
DEPARTMENT OF THE NAVY
NAVAL SEA SYSTEMS COMMAND
15 MAY 2009

S6161-CF-FSE-010
15 May 2009
IDENTIFYING TECHNICAL PUBLICATION SHEET FOR
COMMERCIAL MANUAL
1. PURPOSE: This technical publication sheet is issued for the purpose of identifying and authorizing
the following commercial manual for Navy use.
Manufacturer: Bunn-O-Matic Corporation
Post Office Box 3227
Springfield, IL 62708-3227
Cage 25628
Purchase Order or Contract No.: N62793-03-G-0001
Requisition No.: N/A
Equipment: Model RTF-35
National Stock Number: 0910-LP-108-9799
Title: Coffee Brewer, Models OT and RT; Description, Operation and Maintenance
Additional Identification: N/A
Date: N/A
2. ADDITIONAL COPIES: Additional copies are available from the Naval Logistics Library (NLL).
3. FILE LOCATION: The above-described commercial manual is filed in .
4. AUTHORITY NOTICE AND DISTRIBUTION STATEMENT:
Published by direction of Commander, Naval Sea Systems Command.
Distribution Statement A: Approved for public release; distribution is unlimited.
FOR UNCLASSIFIED MANUALS
NOTICE: Reproduction for non-military use of the information or illustration in this publication is not
permitted. The policy for military use reproduction is established in OPNAVINST 5510.1B.
This material may be reproduced by or for the U.S. Government pursuant to the rights acquired under
Article 42 of Newport News Shipbuilding Purchase Order DoD Contracts Appendix A dated December
2007.

COFFEE BREWER, MODELS OT AND RT
DESCRIPTION, OPERATION AND MAINTENANCE
Part Title
I Operating & Service Manual with Illustrated Parts Catalog for Models
OT & RT, Serial Numbers before RT00005364 with Analog Timer
II Operating & Service Manual with Illustrated Parts Catalog for Models
OT & RT, Serial Numbers RT00005364 and up with Digital Timer

Part I
Operating & Service Manual with Illustrated Parts Catalog for Models
OT & RT, Serial Numbers before RT00005364 with Analog Timer

‘-;’6UNN”
OPERATING& SERVICEMANUAL
BUNN-0-MATIC CORPORATION
POSTOFFlCEBOX3227
SPRINGFIELD,ILLINOIS62708-3227
PHONE:[phone] FAX:[phone]
10021.0000F10198 0 1989 BUNN-0-MATICCORPORATION
Part I

I
” CONTENTS
Introduction...............................................................
2
UserNotices
..............................................................
3
ElectricalRequirements.............................................
4
PlumbingRequirements............................................
4
InitialSet-Up..............................................................
5
OperatingControls.....................................................
6
CoffeeBrewing..........................................................
7
Cleaning
.....................................................................
7
Troubleshooting
.........................................................
8
Service.......................................................................
12
WiringDiagrams........................................................
26
INTRODUCTION
Thisequipmentwillbrewahalf-gallonbatchofcoffeeintoanawaitingdecanteratthepressofabutton.The
OThastwoandtheRThasfivewarmersto keepthebeverageattherighttemperature,ontheRToneofwhichis
capableofheatingwaterto boiling.Thebrewerisonlyfor indooruseonasturdycounterorshelf.
BUNN-O-MATICCOMMERCIALPRODUCTWARRANTY
Bunn-0-MaticCorp.(“Bunn”)warrantstheequipmentmanufacturedbyit to becommerciallyfreefrom
defectsinmaterialandworkmanshipexistingatthetimeofmanufactureandappearingwithinoneyearfromthe
dateofinstallation.Thiswarrantydoesnotapplytoanyequipment,componentorpartthatwasnotmanufac-
turedbyBunnorthat,inBunn’sjudgement,hasbeenaffectedbymisuse,neglect,alteration,improperinstalla-
tionoroperation,impropermaintenanceorrepair,damageorcasualty.
THEFOREGOINGWARRANTYISEXCLUSIVEANDISIN LIEUOFANYOTHERWARRANTY,WRITTEN OR
ORAL,EXPRESSORIMPLIED,INCLUDING,BUTNOTLIMITEDTO,ANYIMPLIEDWARRANTYOFEITHER
MERCHANTABILITYORFITNESSFORA PARTICULARPURPOSE. Theagents,dealersoremployeesof Bunn
arenotauthorizedto makemodificationstothiswarrantyorto makeadditionalwarrantiesthatarebindingon
Bunn.Accordingly,statementsbysuchindividuals,whetheroralorwritten,donotconstitutewarrantiesand
shouldnotbereliedupon.
TheBuyershallgiveBunnpromptnoticeofanyclaimtobemadeunderthiswarrantybytelephoneat(217)
529-6601or bywritingto PostOfficeBox3227,Springfield,Illinois,62708-3227.If requestedbyBunn,the
BuyershallshipthedefectiveequipmentprepaidtoanauthorizedBunnservicelocation.If Bunndetermines,in
itssolediscretion,thattheequipmentdoesnotconformtothewarranty,Bunnshallrepairtheequipmentwithno
chargefor partsduringtheoneyearwarrantyperiodandnochargefor laborbya BunnAuthorizedService
Representativeduringtheoneyearwarrantyperiod.IfBunndeterminesthatrepairisnotfeasible,Bunnshall,at
itssoleoption,replacetheequipmentorrefundthepurchasepricefortheequipment.
THE
BUYER'SREMEDYAGAlNSTBUNNFORTHEBREACHOFANYOBLlGATlONARlSlNGOUTOFTHESALE
OFTHlSEQUIPMENT,WHETHERDERlVEDFROMWARRANTY OR OTHERWISE,SHALLBELIMITED,ASSPECI-
FIEDHEREIN,TOREPAlROR,ATBUNN'SSOLEOPTION,REPLACEMENTORREFUND.Bunnshallnotbeliable
for anyotherdamageor loss,including,butnotlimitedto, lostprofits,lostsales,lossof useofequipment,
claimsofBuyer’scustomers,costof capital,costofdowntime,costofsubstituteequipment,facilitiesorser-
vices,oranyotherspecial,incidentalorconsequentialdamages.
Page2
Part I

a ,
USERNOTICES
Carefullyreadandfollowallnoticesontheequipmentandinthismanual.Theywerewrittenforyourprotection.
Allnoticesontheequipmentshouldbekept-in-goodcondition.Replaceanyunreadableordamagedlabels.
00658.0000
00831.OOOO
+ Fill water tank before turning -on
thermostat or connecting appliance
to power source.
+ Use only on a properly protected
circuit capable of the rated load.
+ Electrically ground the chassis.
+ Follow national/local electrical codes.
+ Do not use near combustibles.
FAILURE TO COMPLY RISKS EQUIPMENT
DAMAGE, FIRE, OR SHOCK HAZARD
READTHEENTIREOPERATINGMANUAL
BEFOREBUYINGOR USINGTHIS PRODUCT
THIS APPLIANCE IS HEATED WHENEVER
CONNECTED TO A POWER SOURCE
00831.0000F3198Q 1988BUNN-O-MATICCORPORATION
This equipment is to be installed to
comply with the Basic Plumbing Code of
the Building Officials and Code
Administrators International, Inc. (BOCA)
and the Food Service Sanitation Manual
of the Food and Drug Administration (FDA).
00656.0000
HIGH HEATWARMER
DO NOTBOIL DECANTERDRY
KEEPCOMBUSTIBLESAWAY
FAILURETO COMPLY RISKS
GLASS FAILURE/HOT LIQUID
BURNS AND FIRE HAZARD
00688.0000
Page3
Part I

.’ ELECTRICALREQUIREMENTS
CAUTION - DonotconnectthebrewertothepowersourceuntilspecifiedinInitialSet-Up.
240V.A.C.
MODELSOT15& 20 require2-
wire, groundedservice rated MODELSOT35& RT35require
3-wire,groundedservicerated
120volts ac, 15 or 20ampre- 120/208or120/240voltsac,20
spectively,singlephase,60 Hz.
Model 15 has an attached amp,singlephase,60Hz.
cordset.
Electrical Hook-Up
ModelOT15hasanattachedcordset.
ModelsOT20,OT35,& RT35,proceedasfollows:
CAUTION- Improperelectricalinstallationwilldam-
ageelectroniccomponents.
1. Anelectricianmustprovideelectricalserviceas
specified.
2. Usingavoltmeter,checkthevoltageandcolor
codingofeachconductorattheelectricalsource.
3. Removethefrontpanelbeneaththesprayhead
androtatethe controlthermostatknobfully
counterclockwiseto the“OFF”positionandre-
placethepanel,.,
4. Removetherearpanel,feedthecordthrough
thestrainrelief,andconnectit to theterminal
block.
5. Connectthe brewerto the’powersourceand
verifythevoltageattheterminalblockbefore
6.
proceeding.Replacetherearpanel.
Ifplumbingistobehooked-uplaterbesurethe
brewerisdisconnectedfromthepowersource.
If Plumbinghasbeenhooked-up,thebreweris
readyfor InitialSet-Up.
PLUMBINGREQUIREMENTS
Thisbrewermustbeconnectedto a cold water
systemwithoperatingpressurebetween20and90
psifromal/2” orlargersupplyline.Ashut-offvalve
shouldbeinstalled‘inthelinebeforethebrewer.ln-
stalla regulatorinthelinewhenpressureis greater
than90 psito reduceit to 50 psi. Thewaterinlet
fittingisI/4”flare.
MODELSOTA,BTA& RT35B
require2-wire,groundedser-
vicerated240voltsacor 200
voltsac,20ampsinglephase,
50Hz.
MODELRT25Brequires2-
wire, grounded service
rated100voltsac,20amp
singlephase,50Hz.
NOTE - Bunn-0-Maticrecommendsl/4” coppertub-
ingforinstallationsof lessthan25feetand3/8”for
morethan25feetfromthel/2” watersupplyline.A
tightcoilofcoppertubinginthewaterlinewillfacili-
tatemovingthebrewertocleanthecountertop.Bunn-
0-Maticdoesnotrecommendtheuseofasaddlevalve
to installthebrewer.Thesizeandshapeofthehole
madein thesupplylinebythistypeof devicemay
restrictwaterflow.
This equipment must be installed to comply
with the Basic Plumbing Code of the Build-
ing Officials and Code Administrators Inter-
national, Inc. (BOCA) and the Food Service
Sanitation Manual of the Food and Drug Ad-
ministration (FDA).
Page4

/
PLUMBINGREQUIREMENTS(Cont.)
PlumbingHook-Up
‘b
r ModelOT15hasanattachedwaterstrainer,proceedto step2.
3‘ ModelsOT20,OT35,& RT35,proceedasfollows:
1. Removetherear
I!
anelandbottom
P
an.
brewerandattac Runthelongpieceoftubingfromthestrainer(supplied)underthe
2. ittothewaterinetfittingonthesolenoid.Reinstallthebottompanandrearpanel.
3. Flushthewaterlineandsecurelyattachittothel/4” flarefittingonthestrainer. Turnonthewatersupply.
INITIALSETUP
CAUTION- Thebrewermustbedisconnectedfromthepowersourcethroughouttheinitialset-up,exceptwhen
specifiedintheinstructions.
1. Removethefront anel.
2. Rotatethe contraP
thermostatknobfullycoun-
ter;zckwisetothe“OFF”positionandreplacethe
3.
4. frnser-tanemptyfunnelintothefunnelrails.
Placea decantercontaininga smallamountof
wateronthewarmerbeneaththefunnel.
5. Connectthe brewerto thepowersource,place
theOn/Offbrewstationwarmerswitchtheupper
k
osition,andmomentarilypressthestartswitch.
aterwill beginflowingIntothetank. When
waterstopsflowingintothetank,initiateasec-
ondandathird,brewcycle.Duringthisthirdbrew
cyclethetankwillfill to itscapacityandtheex-
cesswillflowfromthesprayhead,outofthefun-
nel,andintothedecanter.
NOTE-TheOn/Offbrewstationwarmerswitchmust
beintheupperpositiontoinitiateandcompleteabrew
cycle.
6. PlacetheOn/Offbrewstationwarmerswitchin
7. thelowerposition.
8. Disconnectthebrewerfromthepowersource.
Removethefrontpanel.
P1687
9. Rotatethecontrolthermostatknobfull
wiseto the“ON”positionandreplacet
i clock-
efront
IO. panel.
Connectthebrewertothepowersourceandwait
approximatelytwentyminutesfor the waterin
thetanktoheattothe ro ertemperature.Some
waterwilldripfromt
RPe unneldurin thistime;
this is dueto expansionandshoul
? not occur
thereafter.
11. Placeanemp
1 decanterunderthefunnel. 12. PlacetheOn/ ff brewstationwarmerswitchin
the upperpositionandmomentarilypressthe
startswitch.Emptythedecanterafterwaterhas
13. stoppedflowingfromthefunnel.
Allowthewaterinthetanktoreheattotheproper
14. temperature.
Placeanemptydecanteronthewarmerandpress
thestartswitch.Checkthewatervolumeinthe
decanterafterwaterhasstoppedflowingfrom
thefunnel.It shouldbe64ounces.
15. If not,disconnectthe brewerfrom the power
sourceandremovethefrontpanel.
16. Adjustthebrewtimerdialasrequired.Replace
thefrontpanel,connectthebrewertothepower
source,start,andmeasureanotherbrewcycle.
17. Repeatsteps13-16until64ozwatervolumeis
achieved.
Page5
PI690
Part I

I
OPERATINGCONTROLS
MODELSOT& RT
A. On/OffBrewStationWarmerSwitch
Placingtheswitchintheupperpositionsuppliespowerto thebrewstationwarmerandenablesbrewing.
Placingtheswitchinthelowerpositioncutspowertothebrewstationwarmerandstopsbrewing.Stoppinga r
1..
brewcycleafterit hasbeenstartedwillnotstoptheflowofwaterintothefunneluntilthetanksyphonsdownto
its properlevel.
NOTE- TheOn/Offbrewstationwarmerswitchmustbeintheupperpositionto initiateandcompletea brew
cycle.
B. On/OffBrewStationWarmerIndicatorLamp
GlowswhenevertheOn/Offbrewstationwarmerswitchisintheupperpositionshowingthatthewarmeris
onandthattheautomaticbrewcyclecanbestarted.
C. StartSwitch
StartsabrewcyclewhentheOn/Offbrewstationwarmerswitchisintheupperposition.
MODELOT
A B C
Pl837
MODELRT ..’
I
c
FGABCHI
P1688
Page6
D. UpperWarmerSwitch
Placingtheswitchintheupperpositionsupplies
powertotheupperwarmer.Placingtheswitchinthe
lowerpositioncutspowertotheupperwarmer.
E. UpperWarmerIndicatorLamp
Glowswhenevertheupperwarmerswitchis in
theupperpositionshowingthatthewarmerison.
F. LeftRearWarmerRotarySwitch ‘7
Rotatingtheknobto the-“ON”positionsupplies c
)
L
i
powerto theleftrearwarmer.Rotatingtheknobto
the“OFF”positioncutspowertotheleftrearwarmer.
G. LeftFrontWarmerRotarySwitch
Rotatingtheknobto the“ON”positionsupplies
powerto theleftfrontwarmer.Rotatinatheknobto
the“OFF”positioncutspowertotheleftfrontwarmer.
H. RightFrontWarmerRotarySwitch
Rotatingtheknobto the“ON”positionsupplies
powertotherightfrontwarmer.Rotatingtheknobto
the“OFF”positioncutspowertotherightfrontwarmer.
I. RightRearWarmerThreeHeatRotarySwitch
Rotatingtheknobto the“LO”,“MED”,or “HIGH”
positionssupplypowertotherightrearwarmer.Ro-
tatingtheknobtothe“OFF”positioncutspowertothe
rightrearwarmer.The“HIGH”positionofthisswitch
makesthewarmercapableof boilingwater.
Part I

COFFEEBREWING
Starteachbrewcyclewithanempty,clean,half-gallondecanter.
1. InsertaBUNNYfilterintothefunnel.
2. Pourthefreshcoffeeintothefilterandlevelthebedofgroundsbygentlyshaking.
3. Slidethefunnelintothefunnelrails.
4. PlacetheOn/Offbrewstationwarmerswitchintheupperposition.
5. Momentarilypressthestartswitch.
6. Whenbrewingiscompleted,simplydiscardthegroundsandfilter.
CLEANING
1. Theuseofadampclothrinsedinanymild,non-abrasive,liquiddetergentisrecommendedforcleaningall
surfacesonBunn-0-Maticequipment.
2. Checkandcleanthesprayhead.Thesprayheadholesmustalwaysremainopen.
3. Withthesprayheadremoved,insertthedelimingspring(provided)allthewayintothesprayheadtube.
Wheninsertedproperly,nomorethantwoinchesofspringshouldbevisible.Sawbackandforthfiveorsix
times.Then,repeatthisstepfortheairventtube.
NOTE- Inhardwaterareas,thismayneedtobedonedaily.Itwillhelppreventlimingproblems
takeslessthanaminute. inthebrewerand
Page7
Part I

,
' TROUBLESHOOTING
Atroubleshootingguideisprovidedtosuggestprobablecausesandremediesforthemostlikelyproblems
encountered.If theproblemremainsafterexhaustingthetroubleshootingsteps,contactthe Bunn-0-Matic
TechnicalServiceDepartment,
0 Inspection,testing,andrepairofelectricalequipmentshouldbeperformedonlybyqualifiedservicepersonnel.
l Allelectriccomponentshave120voltacvoltageontheirterminals,Shortingofterminalsortheapplication
of externalvoltagesmayresultinequipmentfailure.
0 Intermittentoperationofelectronicequipmentisunlikely.Componentfailurewillnormallybepermanent.If
an intermittentconditionis encountered,thecausewill likelybea switchcontactor a looseconnectionat a
terminalor crimp.
0 Solenoidremovalrequiresinterruptingthewatersupplytothevalve.Damagemayresultif solenoidsare
energizedfor morethantenminuteswithoutasupplyofwater.
l Theuseoftwowrenchesisrecommendedwheneverplumbingfittingsaretightenedorloosened.Thiswill
helptoavoidtwistsandkinksinthetubing.
0 Makecertainthatallplumbingconnectionsaresealedandelectricalconnectionstightandisolated.
0 Thisbrewerisheatedatalltimesunlessdisconnectedfromthepowersource,Keepawayfromcombustibles.
WARNING
0 Exerciseextremecautionwhenservicingelectricalequipment.
l
Disconnectthebrewerfromthepowersourcewhenservicing,exceptwhenelectricaltestsarespecified.
0 Followrecommendedserviceprocedures
0 Replaceallprotectiveshieldsorsafetynotices
Problem ProbableCause Remedy
Equipmentwillnotoperate. 1.Nopowerorincorrectvoltage (A)Connectthebrewertothepower
source.
..’
Brewcyclewillnotstart. 1.Nowater
2.WaterStrainer
(B)Checktheterminalblockforthe
propervoltages.
(C)Checkcircuitbreaker/fuse.
Checkplumbingandshut-offvalves.’
(A)Directionofflowarrowmustbe
pointingtowardsbrewer.
(B)Removethestrainerandcheck
forobstructions.Clearor replace.
3. FlowControl (A)Directionofflowarrowmustbe
pointingawayfromthesolenoid.
(B)Removethecontrolandcheck
for obstructions.Clearorreplace.
Page8
Part I

u L
TROUBLESHOOTING(cont.)
Problem , ProbableCause Remedy
Y--x
!/ ; Brewcyclewill notstart.(cont.) 4. On/OffBrew Station Warmer Referto Service- On/OffBrewSta-
Switch tionWarmerSwitchfortestingpro-
cedures.Seepage17.
5.StartSwitch Referto Service- StartSwitchfor
testingprocedures.Seepage23.
6. BrewTimer Referto Service- BrewTimerfor
testingprocedures.Seepage13.
7.SolenoidValve RefertoService-SolenoidValvefor
testingprocedures,Seepage22.
Waterflowsintotankcontinuously 1.SolenoidValve RefertoService-SolenoidValvefor
(On/Offbrewstationwarmerswitch
“OFF”). testingprocedures.Seepage22.
Waterflowsintotankcontinuously 1.BrewTimer Referto Service- BrewTimerfor
(On/Offbrewstationwarmerswitch testingprocedures.Seepage13. I
- _ . _
I-.
(C 1 "ON"). \ 1
~. I
5 ,.r
Wateris nothot. I. LimitThermostat Referto Service- LimitThermostat
fortestingprocedures.Seepage21.
CAUTION
I
, Donoteliminateorbypasslimitther-
I mostat.Useonly B.O.M.replace-
I
I ..’ mentpart#04680.0000
2.ControlThermostat Referto Service- ControlThermo-
stat for testingprocedures. See
page14.
Decanterwarmerisnothot,
3.TankHeater
1.WarmerSwitches
Referto Service- TankHeaterfor
testingprocedures.Seepage24.
(A)TheWarmerSwitch(es)mustbe
inthe“ON”positionfor thewarmer
to operate.
2.DecanterWarmers
Page9
(B) Refer to Service - Warmer
Switch(es)for testingprocedures.
Seepages17,18,& 19.
RefertoService-Warmersfortest-
ingprocedures.Seepages15&16.
Part I

Y
1 TROUBLESHOOTING(cont.)
Problem ProbableCause Remedy
Spittingorunusualsteamingfrom 1,ControlThermostat
sprayhead.
2.Limebuild-up
CAUTION
Tankandtankcomponentsshould
bedelimedregularlydependingon
localwaterconditions.Excessive
mineralbuild-uponstainlesssteel
surfacescaninitiatecorrosivereac-
tionsresultinginseriousleaks.
Inconsistentbeveragelevelinde- 1.Flowcontrol
canter.
2.improperwaterpressure
3.Syphonsystem
Consistentlyhighor lowbeverage
levelindecanter. 1.BrewTimeradjustment
Drippingfromsprayhead. 1.Syphonsystem
2.SolenoidValve
.RefertoService- ControlThermo-
statfor testingprocedures.See
page14.
Inspectthetankassemblyforexces-
sivelimedeposits.Delimeasre-
quired.
(A)Directionofflowarrowmustbe
pointingawayfromthesolenoid.
(B)Removethecontrolandcheck
forobstructions.Clearorreplace.
Checktheoperatingwaterpressure
tothebrewer.It mustbebetween
20and90psi.
Watershouldflowfreelyfromthe
sprayheadforapproximatelytwenty
secondsafterthebrewsolenoidhas
shut-offandthenstopflowing
abruptly.Thebrewermustbelevel
fromfront-to-backtosyphonprop-
erly.
Adjustthebrewtimerasrequiredto
achievetherecommended64ozfor
eachbrewcycle.
Watershouldflowfreelyfromthe
sprayheadforapproximatelytwenty
secondsafterthebrewsolenoidhas
shut-offandthenstopflowing
abruptly.Thebrewermustbelevel
fromfront-to-backtosyphonprop-
erly.
RefertoService-SolenoidValvefor
testingprocedures.Seepage22.
0
Q
Page10
Part I

TROUBLESHOOTING(cont.)
Problem ProbableCause Remedy
Beverageoverflowsdecanter. I. Beverageleftindecanter Thebrewcycleshouldbestarted
onlywithanemptydecanterunder
thefunnel.
Weakbeverage. 1.Typeofpaperfilters
2.Coffee
3.Sprayhead
4.Funnelloading
5.Watertemperature
Breweris makingunusualnoises. 1.SolenoidValve
2. Plumbinglines
3.Watersupply
Page11
BUNNYpaperfiltersshouldbeused
for properextraction.
A sufficientquantityoffineor drip
grind coffeeshould be usedfor
properextraction.
B.O.M.sprayhead#01082.0000
shouldbeusedto properlywetthe
bedofgroundcoffeeinthefunnel.
TheBUNN@paperfiltershouldbe
centeredin thefunnelandthe bed
ofcoffeeleveledbygentleshaking.
Placea funneloveran emptyde-
canteronthe warmerbeneaththe
sprayhead.PlacetheOn/Offbrew
stationwarmerswitchintheupper
position,pressthestartswitch,and
checkthewatertemperatureimme-
diatelybelowthesprayheadwithan
accuratethermometer.Thereading
shouldnotbelessthan195OF.Ad-
justthecontrolthermostatslightly
clockwisetoincreasethewatertem-
perature.
Thenutontopofthesolenoidvalve
mustbetight or it willvibratedur-
ingoperation.
Plumbinglinesshouldnot rest on
thecountertop.
(A)Thebrewermustbeconnected
to acoldwaterline,
(B) Waterpressureto the brewer
mustnotbehigherthan90psi. In-
stallaregulatorifnecessarytolower
the workingpressureto approxi-
mately50psi.
Part I

I
SERVICE
Thissectionprovidesproceduresfortestingandreplacingvariousmajorcomponentsusedinthisbrewer
shouldservicebecomenecessary.Referto Troubleshootingforassistanceindeterminingthecauseofany
problem.
Component Access
WARNING- Inspection,testing,andrepairofelectri-
calequipmentshouldbeperformedonlybyqualified
servicepersonnel.Thebrewershouldbedisconnected
fromthepowersourcewhenservicing,exceptwhen
electricaltestsarerequiredandthetestprocedure
specificallystatestoconnectthebrewertothepower
source. Contents
BrewTimer
...........................................................
13
ControlThermostat
...............................................
14
Warmer(s)
WARNING- Disconnectthebrewerfromthepower
sourcebeforetheremovalofanypanelorthereplace-
mentofanycomponent.
Thebrewtimer,andcontrolthermostatarelo-
catedbehindthefrontpanel,FIG.1locatedbeneath
thebrewfunnel,attachedwithfour#8-32slotted-head
screws.
Thebasewarmer(s),switch(es),indicatorlamp,
startswitch,tank“keepwarm”heater,terminalblock,
andsolenoidvalve,arelocatedinthebase.Accessis
gainedbyremovingtherearpanel,FIG.1attached
withtwof8-32slotted-headscrews
Thelimitthermostat,andtankheaterarelocated
onthetanklid.Accessisgainedbyremovingthetop
lid, FIG.1 attachedwiththree#8-32slottedhead
screws.OnthemodelOT,theupperwarmer,switch,
andassociatedindicatorlamparelocatedonthisre-
movabletoplid.
01 BrewStation& Upper
.............................................
15
RT: LeftRear,LeftFront,BrewStation,& RightFront..
. 15
RT: RightRearThreeHeat
.............................................
16
WarmerSwitch(es)
OT On/OffBrewStation& Upper
..................................
17
RT: On/OffBrewStation
................................................
17
RT: LeftRear,LeftFront,&RightFrontRotary..
............ 18
RT: RightRearThreeHeatRotary
................................. 19
IndicatorLamp(s)
.................................................
20
LimitThermostat
..................................................
21
SolenoidValve
......................................................
22
StartSwitch
..........................................................
23
TankHeater...........................................................
24
ThermalCut-off
...................................................
25
WiringSchematics
...............................................
26
1
PI687
FIG.1ACCESSPANELS
Pi668
Page12
Part I