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Bradford-White Corp MI30T*F manual

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  • Page 1

    Save this manual for future reference Manual 238-44943-00D SERVICE MANUAL Troubleshooting Guide and Instructions for Service FEATURING (To be performed ONLY by qua lified servi ce providers) For the Bradford White Defender Safety System ® Models: MI30T*F(BN,CX,SX) MI30S*F(BN, CX,SX) MI303T*F(BN,CX,SX) MI40T*F(BN,CX,SX) MI403S*F(BN,CX,SX) MI404T*F([...]

  • Page 2

    The Bradford White DEFENDER Safety S ystem ® Flammable Vapor Igniti on Resistant W ater Heaters Table of C ontents Page Service Procedure Introduction 3 - - - Trouble shooting Chart 4 - - - Inner Door Gas ket R emoval, Inspection, Re placement and Insta llation 7 RG-I Thermocouple/Thermopile Testing and Re placement 10 RG-II Pilot Assembly Inspect[...]

  • Page 3

    Th e Bradfo rd Wh it e DEFE NDER Sa fet y Syste m ® Th e Br ad ford W h ite DE FE NDE R Saf et y Sys tem ® was design ed to resist the ig nit i on of flam ma bl e vapor s tha t ca n occ ur out sid e of t he wat er heat er. U se an d in sta ll atio n are ne arl y iden ti ca l t o pre vious vers i ons of atm osph erica l ly fi red an d ven ted wa t[...]

  • Page 4

    White Rod gers/ Rober tshaw Ga s Valve Tro ublesh ooting Chart SYMPTOM P ROBABLE CAUSE CORRECT IVE ACTION Pilot Will Not Light 1. N o inco mi ng g as or t oo lo w gas pre ssu re. 2. Gas con tr ol kn ob set t o wrong po si ti on. 3. Pi lo t lig ht butto n not b ei ng fu ll y depr e sse d whe n at tem pt in g to l ig ht pi lo t. 4. P il ot or ifi ce [...]

  • Page 5

    Honeyw e ll Gas Co ntrol Troublesho oting Chart LE D Stat us Cont rol St atus Prob ab le Cau s e None (LED n ot on or fla shing Gas Contr ol is operat ing norm ally. Pilo t flame may not be pres ent. Check fo r pilot f lame throug h sight glas s and li ght if necessar y. If set poi nt knob is in “PI LOT” posi tion then pil ot flam e is detect e[...]

  • Page 6

    Hon eywel l Gas C ontr ol Trouble shooting C hart LE D Stat us Cont rol St atus Prob ab le Cau s e Five flashes and three seco nd pause Therm ostat/w ell sens or faul t. Gas Contr ol electr oni c fault detec ted. Seven flashes and three seco nd pause Eight f l ashes an d three seco nd pause Standi ng pi lot remain s o n whil e s et point k nob is i[...]

  • Page 7

    Inner Do or Removal Pr ocedure Step 1. Rot ate kn ob of th e co mbin a tion ther most at/gas valv e to the “O FF” pos iti on. Step 2. Re mo ve ou te r j a cke t b urn e r a cce ss do or Step 3. In ner Doo r R e mova l . a) D isconn ect r esetta ble th erm al swit ch wire l eads (leadi ng fro m Ga s Co ntrol/ gas va lve ). b) R emove (2) hex dri[...]

  • Page 8

    Instal lation of Inner Door With Ga sket. WARNING Stripp ed faste n er co n nectio ns may allow for seal breach of inner d oor. A seal brea ch may resu lt in a fire o r exp lo sion causin g pro perty d amag e, p erso n al i njury or d eath. Do no t over tighte n s crews in steps 8, 10 and 11. If a fast ener connect ion is st ripped, cont act the ma[...]

  • Page 9

    St ep 10. Fir mly pl ace righ t side inner door fl ange ag ainst th e lef t side i nner do or fla nge and secu re wi th (2) hex dr ive screws fr om step 3c. DO NOT OVER TIGHTEN S CREWS . St ep 11. Ali gn righ t side inner d oor to c ombust ion c hambe r and verify t he fast ener ho les of th e comb ust ion cha mb er ar e al ig ne d wi th th e ri gh[...]

  • Page 10

    St ep 1. C losed circui t test ing i s the pr eferr ed me thod for testi ng th ermoc oupl e. Fo llo wing t he li ghting instr ucti on labe l on t he heat er, pro ceed to l igh t the pilot an d allow t o ope rate f or th r ee mi nuets . If the p ilot will no t stay lit , hold the pilo t but ton (l ocate d on the co mbin ation t hermos tat/g as valv [...]

  • Page 11

    THERMOCOUPLE REPLACEMENT (White Rodgers/Robertshaw Ga s Valve) Step 1. T urn o ff gas sup ply to w ater heater. Rotat e k nob o f combi natio n the rm ost at /g as valv e to “O FF ” po s ition . Step 2. Remov e outer j acket do or. Step 3. Remo ve right si de of inner d oor pe r SERVICE PROCED URE RG-I, steps 3a thro ugh 3c. Step 4 Di sconnec t[...]

  • Page 12

    The f oll ow in g te st sh ould be per f orm ed w hi le th e pi lot f lam e is o n. St ep 1. Tu rn knob to pi lot pos ition and dep res s. Step 2. C on ti nue pre ssin g kn ob a nd re move re d ( +) wi re fro m re se tt able th erma l do or sw it ch. Step 3. Us ing a mu lt im et er cap ab le o f me a sur in g m ill iv ol ts, c o nn ect th e p osi t[...]

  • Page 13

    PILOT /EL ECTRO DE ASSEM BLY INSPE CTION, CLEANING AND REPLACE MENT St ep 1. Tu r n of f gas supply to water h eater. Rotate knob of gas con tr ol/ ga s v al ve to “O FF” p ositi on. Step 2. Rem ov e ou te r j ack et do or . St ep 3. Re move r igh t side o f inner door p er SERVICE PROCEDURE RG-I, st eps 3a t hro ug h 3 c. St ep 4 D isconn ect [...]

  • Page 14

    PIEZO IGNITER, ELECTRODE TESTING AND REPLACEMENT W ith t he pilot not i n opera tion (n o pilot fla me) y ou can c heck t he Piez o a nd el ectro de circ uit by view ing pi lot thr u the s ight glass l ocated on th e inne r doo r and ob serving the spa rk acti on. St ep 1. R emov e out er jac ket door . St ep 2. Rep eated ly dep ress the Pie zo ign[...]

  • Page 15

    SERVICE PROCE DURE RG-V Gas Valve Testing and Replacement (White Rodgers/Robertshaw) The gas val ve is a non rep airabl e device. If tro uble sh ooting has det ermine d a probl em with the gas valve, it mus t be repl aced. If the bu rner an d/or pi lot do not f unction , servi ce chec ks for g as pressu re, th ermoco uple out put, m agnet assem bly[...]

  • Page 16

    See SERVICE PRO CEDURE RG-II THERM OCOUPL E TEST ING MAGNET ASSEMBLY T ESTING (White Rodgers Co ntrol) Ste p 1. Follo win g t he li gh ti ng in stru c tion la bel on the he ate r, p roc eed to li gh t t he p il ot and allo w t o ope ra te f or thre e min uets . If the pi lot w ill n ot sta y lit , ho ld th e pilo t b utto n (l oca ted on th e ga s [...]

  • Page 17

    COMBINATION THERMOST AT/GAS VALVE REPLACEMENT Step 1 . Rot at e kn ob of th e ga s va lv e to th e “O FF ” pos i ti on. Ste p 2. Tu rn of f g as sup ply to wa ter heat er. Ste p 3. Dis con nec t gas suppl y line f rom gas v alve. Ste p 4. Tur n off wa ter supp ly and dr ain wa ter h eater co mpletel y. Ste p 5. Rem ove o uter j acket b urner ac[...]

  • Page 18

    Step 7. Removal of gas va lve. a) Disconnect main burner feedline, pilot tube and the rmocouple from gas valve & remove burner from combustion chamber. NOTE: Feed line nut for natur al gas control us es right hand threads, LP control us es left hand thread. b) Remove piezo br a cket with piezo igni ter (refer to SERVICE PROCEDURE RG-IV) from ga[...]

  • Page 19

    Step 9. Re insta llation of inner door assembl y. (cont.) b) Clean a ny gask et residu e or oth er de bris f rom co mbust ion c hambe r sur f a ce bef ore inst alling the in ne r doo r/g as ket a ss emb ly . c) P ositio n therm ocouple , pilo t tub e and P iezo w ire agai nst left sid e inne r do or flange gasket . DO N OT ROU TE THRO UGH RADIU S E[...]

  • Page 20

    SERVICE P ROCEDURE RG-VI Gas Control Testing, Disa ssembly & R eplacement (Honeywell) The Bra dford White DEFENDER Safety Sys tem ® Honey well Gas Control T esting, D isasse mbly, and Replacem ent Th e Gas C ontrol i s m ade up of ( 5) majo r com pone nts; t he con trol co ver, t he pie zo ignit er, t he valve body, t he tem peratur e se nsor,[...]

  • Page 21

    SERVICE PROCEDURE RG -VI Gas Control Testing, Disa ssembly & Replacement (H oneywell) The Bradford White DEFENDER Safety Sy stem ® MANIFOLD P RESSURE T ESTING (this proce dure presumes a maximum line pr essure of 14.0" w.c.) St ep 1. Set th e Gas Co n tr ol to th e “OFF ” positi on. Step 2. Re move pr es su re tap pl ug an d ins t al [...]

  • Page 22

    SERVICE P ROCEDURE RG-VI Gas Control Testing, Disa ssembly & R eplacement (Honeywell) The Bra dford White DEFENDER Safety Sys tem ® TEMPERAT URE S ENSOR TESTING T emp era tu re S en so r T es ti ng Fol lowin g “Gas Co ntr ol Dis a s sembl y/Rea ssembly” inst ructi ons, disasse mble Ga s Co nt rol to a cces s tem pe rat ure se ns or. N Y Us[...]

  • Page 23

    SERVICE P ROCEDURE RG-VI Gas Control Testing, Disa ssembly & R eplacement (Honeywell) The Bra dford White DEFENDER Safety Sys tem ® ° F 012345678 9 40 26109 25400 24712 24045 23399 22771 22163 21573 21000 20445 50 19906 19383 18876 18383 17905 17440 16990 16553 16128 15715 60 15314 14925 14548 14180 13823 13477 13140 12812 12494 12185 70 1188[...]

  • Page 24

    SERVICE P ROCEDURE RG-VI Gas Control Testing, Disa ssembly & R eplacement (Honeywell) The Bra dford White DEFENDER Safety Sys tem ® GAS CONTROL DISASS EM BLY/REAS SEMBL Y St ep 1. R otate knob o f the Gas Cont rol to the “OFF ” posi tion . St ep 2. T urn off g as sup ply t o wa ter h eater . Step 3. D isc o nne ct gas su pp ly li ne fro m [...]

  • Page 25

    SERV ICE PROCE DURE RG- VI Gas Control Testing, Disassembly & Replacement (Honeywell) The Bradford White DEFENDER Safety S ystem ® GAS CONTROL DISAS SEMBL Y/REA SSE MBLY Step 8. Disco nnect te mper ature sen sor fr om contr ol b oard and remove wire fr om the t empera ture s ensor wir e rout ing cli p. Di sc o nn e ct temperature sensor St ep [...]

  • Page 26

    SERV ICE PROCE DURE RG- VI Gas Control Testing, Disassembly & Replacement (Honeywell) The Bradford White DEFENDER Safety S ystem ® GAS CONTROL DISAS SEMBL Y/REA SSE MBLY Step 11. Rem ove te mperat ure se ns o r an d insert ion st ick fr om backp late by f irst r emoving wire f r om t he tempe ratu re sen sor wir e rou t ing clips l ocat ed on [...]

  • Page 27

    T emperat ur e sensor Insertion s tick SERVICE P ROCEDURE RG-VI Gas Control T esting, Dis assembly & R eplacement (Honeywell) The Bra dford White DEFENDER Safety Sys tem ® GAS CONTROL DISASS EM BLY/REAS SEMBL Y St ep 12. Re mov e tem peratur e senso r from inser tio n stick by pu llin g apar t as illu stra ted be low. Pull i n this direction P[...]

  • Page 28

    SERVICE P ROCEDURE RG-VI Gas Control Testing, Disa ssembly & R eplacement (Honeywell) The Bra dford White DEFENDER Safety Sys tem ® GAS CONTROL REPL ACEMENT Ste p 1. Ro tate kno b of t he Gas Co ntrol to th e “OFF” po siti on. Ste p 2. Tu rn of f g as sup ply to wa ter heat er. Ste p 3. Dis connec t gas suppl y line f rom Gas Co ntrol. Ste[...]

  • Page 29

    SERVICE P ROCEDURE RG- VI Gas C ontrol Testing, Disassembly & Replacement ( Honeywell) The Bradford White DEFENDER Safety Sy stem ® GAS CONTROL REPL ACEMENT b) Re a tt ach ma in bu rn er f eed li ne , p il ot tu be , pi e zo ig ni te r w ir e, i nn e r do or wi re ( re d) and t he rm op il e wir e (white ) to Gas Co ntrol. A ttach in ner doo r[...]

  • Page 30

    SERVICE P ROCEDURE RG-VI Gas Control Testing, Disa ssembly & R eplacement (Honeywell) The Bra dford White DEFENDER Safety Sys tem ® GAS CONTROL REPL ACEMENT Step 9. Reinstallation of inner do or assembly (continued). d) F irm ly pl ace ri gh t si de in ner doo r fl ang e a gai ns t the le ft s ide i nn er door f lang e a nd s ecu re wi th (2) [...]

  • Page 31

    Step 1. W it h ma in bu rne r i n o pera t ion , re mo v e r igh t s ide inn e r do or pe r SE RV ICE P ROC ED URE I , st eps 3b & 3 c. Be s ur e to m ain tai n wi re co n nectio n to reset tabl e therm al s wit ch fo r th is a dju stme nt p ro ced ure. St ep 2. To ad just f or pr oper bu r nin g, loo sen the air sh utte r nut , rot ate the shu[...]

  • Page 32

    Step 3. Fully in spect i nner ga sket pe r SERVI CE PROCED URE RG-I, step 4. Replace ga sket if r equire d followi ng SERVICE PROCEDURE I, ste ps 5 & 6. Step 4. Be ce rta in th at th ermo co upl e, p ilot tube a nd piez o wir e are rou ted b y inn er do or flan ge as s hown a nd Rei nstall inne r door pe r SE RV IC E P ROC ED UR E RG- I, step 1[...]

  • Page 33

    Step 5. Disco nnect (uns crew) Mai n burner (st eel) fro m main bur ner ori fic e or on c ast i ro n burne rs (“C ” bur ner) , loose n air shutt er & dis conne ct (u nsc r ew ) f eedli ne from burner. St ep 6. Remov e main bu rner ori fice fro m feed l ine. Ins pect and clean i f neces sary . Step 7. Remo ve p ilot assembly , refe r to S ER[...]

  • Page 34

    Ste p 1. Remo ve ou ter jack et doo r. Step 2. D i sconn ect wire le ads f rom re setta b le th erma l sw it ch. Ste p 3. Usin g a mu ltim eter cap able of m ea surin g cont inui ty (Oh ms), place o ne prob e of mete r on one of th e bra ss con necti on tab s of the r eset tab le ther mal sw itch, and t he rema inin g pro be o n the other connect i[...]

  • Page 35

    RESET TABLE THERMAL SWIT CH REPLACE MENT Ste p 1. Rot a te kn ob of c om bina ti on th er mo stat g a s va lve to the o ff p osi tion . Step 2 . Remove out er jac ket door . Step 3. Di sconn ect wir e lea ds from res ettab le th erma l swit ch. Ste p 4. Re mo ve re se ttab le the rma l s witc h f rom in ner d oo r (P hilli ps sc rew dr iver ) Step [...]

  • Page 36

    S ERVICE PROCEDU RE RG-IX S creenLok ® F lam e Arrestor Cleaning St ep 1. Rotat e knob of co mbinat ion ther most at gas valve t o the o ff pos ition . St ep 2. Remov e outer j ac ket door. Step 3. Re mo ve i nn er door pe r SER V ICE PRO CE DUR E RG -I , st e p 3a thr ou gh 3e. Step 4. Dis co nnec t main bu rner fe ed li ne , p il ot tu be and th[...]

  • Page 37

    SERVICE PROCE DURE RG- X Dip Tube a nd Anode Inspection and Replacement St ep 1. Rotate k nob of c ombi na tio n therm o st at/g as valv e to “OFF ” posi tion. Step 2. Tu rn o ff c o ld wate r s upp ly to hea te r. C o nne ct ho se to d r ain s p igot of wa te r h eat e r a nd rou te t o a n o p en dr ai n. Open a nearby h ot water faucet to ve[...]

  • Page 38

    St ep 1. Turn of f wat er suppl y to w ater heat er. Ro tate k nob of c ombinat ion t hermost at/gas v alve to “O FF” posi tion. Step 2. Tu rn o ff c o ld wate r s upp ly to hea te r. C o nne ct ho se to d r ain s p igot of wa te r h eat e r a nd rou te t o a n o p en dr ai n. Open a nearby h ot water faucet to ven t heater for dra ining. Op en[...]

  • Page 39

    1 Draft Hoo d 2 Ho t Water Outle t/Ano de 3 Col d Wa te r I nle t Tu be 4 Flue Baf fle 5 T&P Relief Valve 6A Gas C on tr ol (H on eyw e ll) 6B Gas Val ve (R obertsh aw) 6C Gas Val ve (Whi te Ro dgers) 7 Pi ezo I gn it er ( Whi te R od ger s/R ob ert sha w) 8 Brass Drain Valve 9 Scr ew -# 8- 18 x 3 /4 H ex Wash er He ad 10 Scr ew- #10 -1 2 x 3/ [...]

  • Page 40

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