Bradford-White Corp Flammable Vapor Ignition Risistant Water Heaters manuale d’uso

Save this manual for future reference Manual 238-44943-00D SERVICE MANUAL Troubleshooting Guide and Instructions for Service FEATURING (To be performed ONLY by qualified service 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(BN[...]

The Bradford White DEFENDER Safety Sys tem ® Flammable Vapor I gnition R esistant Wate r Heaters Table of Conte nts Page Service Procedure Introduction 3 - - - Trouble shooting Chart 4 - - - Inner Door Gas ket Removal, I nspection, Replacement and Insta llation 7 RG-I Thermocouple/Thermopile Te sting and Replacement 10 RG-II Pilot Assembly Inspect[...]

Th e Bradfo rd Whit e DEFE NDER Safet y Syste m ® Th e Brad for d Wh ite DE FENDE R Saf ety Syst em ® was desig ned to resist the ig nit ion of fl amma ble va por s that ca n occ ur outs ide of t he wat er heat er. Us e and in sta llat ion are nearly id en tica l to pre vious ve rsi ons of atm osph erica lly fi red an d vente d wate r heat ers. A[...]

White Rod gers/Rob ertshaw Ga s Valve Tro ubleshoo ting Chart SYMPTO M PROBABL E CAUSE CORRECT IVE ACTION Pilot Will Not Light 1. N o inco ming g as or to o low g as pre ssure. 2. Gas c on trol kn ob set to wr ong po siti on. 3. Pi lot l ight bu tton not b eing full y dep res sed wh en a tte mpt ing to l igh t p ilot . 4. P ilot or ifi ce or pilo t[...]

Hon eywell Gas Control T rouble shootin g Char t LE D Status Cont rol Stat us Prob able Caus e None (LED n ot on or fla shing Gas Control is oper ating normall y. Pilo t flame may not be present . Check fo r pilot flame throug h si ght glas s and light if nec essary. If set poi nt knob is in “PILOT ” posi tion then pil ot flame is detect ed. T [...]

Hon eywell G as Contr ol Troubles hootin g Char t LE D Status Cont rol Stat us Prob able Caus e Five flashes and three seco nd pause Therm ostat/w ell sensor faul t. Gas Contr ol electro nic fault detec ted. Seven flashes and three seco nd pause Eight f lashes an d three seco nd pause Standing pi lot rem ains on whil e set point knob is in “OFF?[...]

Inner Do or Removal Procedur e Step 1. Rot ate knob of the comb ina tion ther most at/gas valve to the “O FF” p ositi on. Step 2. Re move oute r j ack et burn er acc ess door Step 3. In ner D oo r Re mova l. a) Disconnect resett able thermal switch wire leads (l eading from Gas Control/gas valve) . b) R emo ve (2 ) hex drive s cre ws fro m ri g[...]

Instal lation of Inner Doo r With Gas ket. WARNING Stripp ed fastener connectio ns may allo w for seal breach of inner door. A seal brea ch may result i n a fire or explosi on causin g property damage, perso nal injury or d eath. Do not over tighten sc rews in steps 8, 10 and 11. If a fast ener conn ection is st ripped, cont act the man ufactu rer [...]

St ep 10. Fir mly place right s ide inner doo r flang e agai nst th e le ft si de inne r door fla nge and secur e with (2) he x dri ve screws from step 3c. DO NOT OVER TIGHTEN SCREWS . St ep 11. Ali gn ri ght si de inner d oor t o com busti on cham ber and ver ify t he fas ten er holes of th e co mbust ion cha mbe r ar e al ig ned w ith th e ri ght[...]

St ep 1 . C losed ci rcui t tes tin g is th e pre fe rred meth od fo r te sti ng th er mocou ple. Fol lowi ng t he li ghti ng in str ucti on labe l o n the heat er, proceed to li ght t he pilo t and a llow t o ope rate fo r th ree mi nuet s. If t he pilot will not st ay lit , ho ld th e pilo t but ton ( loca ted on th e comb inat ion t herm ostat /[...]

THERMOCOUPLE REP LACEMENT (Whit e Rodgers/Robertshaw Ga s Valve) Ste p 1 . Tu rn off gas su pply to wa t er he ate r. R ot ate kn ob of comb ina ti on the rm ost at /ga s valv e to “O FF” p o siti on. Step 2. Remov e outer j acket door . Step 3. Remove right si de of inner d oor per SERV ICE PROCEDURE RG-I, steps 3a t hrough 3c. Ste p 4 Disc on[...]

The f oll owin g t est s hou ld be perf orm e d whi le th e pi lot f lam e is on. St ep 1. Tu rn kn ob to pilo t pos iti on and depr ess. Step 2. Con tinu e pre ssin g knob and remo ve r ed ( +) wi re from r ese tt able the rmal door swit c h. Step 3. Us ing a mult im eter ca pab le o f me asur in g mill iv olts , c onn ect th e posi ti ve s ide of[...]

PILOT /ELECT RODE ASS EMBLY INSPE CTION, CLEANING AND REPLACE MENT St ep 1. Tu rn off gas s upply to wat er h eater. Rotat e knob of gas c on trol/ ga s v alve to “O FF” p osi tion . Step 2. Rem ove oute r j ack et do or . St ep 3. Re move r igh t side o f in ner d oor p er SERVICE PROCEDURE RG-I, st eps 3a t hro ugh 3 c. St ep 4 D isco nnect t[...]

PIEZO IGNITER, ELECTRODE TESTING AND REPLACEMENT With the pilo t not in op erat io n (no pilo t flam e) yo u can check the Piezo a nd e lec trod e ci rcui t by v iewi ng p ilot thr u th e sight glass loca ted on the i nner door and ob servi ng th e spa rk acti on. Step 1. Remo ve ou ter jac ket doo r. St ep 2. Repeat edly depr ess t he Pie zo ign i[...]

SERVICE PROCE DURE RG-V Gas Valve Testing and R eplacement ( W hit e Rodgers/Robertshaw) The gas va lve is a non r epai rable devi ce. If troub le sh ooti ng has d eter mine d a pro blem with the ga s valve , it must b e repl aced. If the bu rner an d/or pilot do not fun ction , ser vice c hecks f or g as press ur e, ther moco uple o utpu t, mag ne[...]

See SERVICE PRO CEDURE RG-II THERM OCOUPL E TESTI NG MAGNET ASSEMBLY T ESTING (White Rodgers Control) Ste p 1. Fo llow ing t he li ghti ng instru cti on label on the he ater, proc eed to li ght t he p il ot and al low t o ope rat e f or thre e min uets. If the pilo t wil l not stay l it, hold the pilo t but ton (loc ate d on the ga s val ve) d own [...]

COMBINATION THERMOST A T/GAS V ALVE REPLACEMENT Step 1 . Rot ate kn ob of th e ga s valv e to th e “O FF ” pos iti on. Step 2. Turn off gas supply to water hea ter. Ste p 3. D isc onnec t gas sup ply l ine f rom gas valv e. Ste p 4. Tu rn off water supp ly and drai n wate r heat er co mple tely . Ste p 5. R emove o uter jack et bur ner access d[...]

Step 7. Removal of gas valve. a) Disconnect main burner f eedline, pilot tube and thermocouple from gas valve & remove burner from combustion chamber . NOTE: Feed line nut for natural gas control uses right hand threads, LP control us es left hand threa d. b) Remove piezo br acket with piezo igniter (refer to S ERVICE PROCEDURE RG-IV) from gas [...]

Step 9. Re installation of inner door assembly. (cont.) b) Clean a ny g asket r esi due o r other debr is fr om co mbust ion c hambe r sur face b efore i nst alling the in ner d oor /ga sket a sse mbly . c) P osit ion t hermoc oup le, pi lot t ube an d Pie zo w ire agai nst left s ide i nner door f lange gask et. DO NO T RO UTE THRO UGH RADIU SED C[...]

SERVICE PROCEDUR E RG-VI Gas Control Testing, Disassembly & Re pl a cement (Honeywell) The Bradford W hite DEFENDER Safety Sys tem ® Honey well Gas Control T esting, D isasse mbly, and Rep lacement The G as Co ntro l is made u p of (5 ) maj or co mpon ents; the cont rol c over, the piezo igni ter, the valve body , th e temp era ture se nsor, a[...]

SERVICE PROCEDURE RG -VI Gas Control Testing, Disassembly & Replacement (Honeywell) The Bradford White DEFENDER Safety Sy stem ® MANIFOLD P RESSURE T ESTING (this proce dure presu mes a maxi mum line pr essure of 14 .0" w.c.) St ep 1. Set the Gas Cont rol to th e “OFF” posi tion . Step 2. Re move pr essu re tap plug an d inst a ll 1/8[...]

SERVICE PROCEDUR E RG-VI Gas Control Testing, Disassembly & Re pl a cement (Honeywell) The Bradford W hite DEFENDER Safety Sys tem ® TEMPERAT URE S ENSOR TES TING Tempe rat ure Sensor Test ing Fol low ing “ Gas Co ntr ol Dis assem bly/ Reasse mbly” inst ruc tions, disa ssembl e Gas Co ntr ol to a cces s te mpe rat ure se nsor . N Y Usi ng [...]

SERVICE PROCEDUR E RG-VI Gas Control Testing, Disassembly & Re pl a cement (Honeywell) The Bradford W hite 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 70 118[...]

SERVICE PROCEDUR E RG-VI Gas Control Testing, Disassembly & Re pl a cement (Honeywell) The Bradford W hite DEFENDER Safety Sys tem ® GAS CONTROL DISASS EMBLY/ REASSEMBL Y St ep 1. Ro ta te kno b of the Gas Cont rol to th e “OFF ” pos iti on. Step 2. Tu rn off gas s upp ly to wat er he ate r. Step 3. D isco nn ect gas s upp ly li ne from G [...]

SERV ICE PROCEDURE R G-V I Gas Control Testing, Disassembly & Replacement (Honeywell) The Bradford White DEFENDER Safety S ystem ® GAS CONTROL DISASSEMBL Y/REASSE MBLY Step 8. D isconn ect te mper ature s ens or fr om con trol b oard and r emove wire f ro m the tem pera ture senso r wire ro utin g cli p. Disconnec t temperature sen sor St ep 9[...]

SERV ICE PROCEDURE R G-V I Gas Control Testing, Disassembly & Replacement (Honeywell) The Bradford White DEFENDER Safety S ystem ® GAS CONTROL DISASSEMBL Y/REASSE MBLY Step 11. R emov e temp erat ure sen sor an d ins ertio n st ick f rom bac kp late b y first remo ving wire from t he tem pera tur e sens or wire rout ing c lip s lo cate d on th[...]

Temperat ure sensor Insertion s t ick SERVICE PROCEDUR E RG-VI Gas Control Testing, Disassembly & Re placement (Honeywell) The Bradford W hite DEFENDER Safety Sys tem ® GAS CONTROL DISASS EMBLY/ REASSEMBL Y St ep 12. Remov e t emper ature s ens or fr om i nsert ion s tick by pu llin g apar t as illu stra ted belo w. Pull in th is dir ection Pu[...]

SERVICE PROCEDUR E RG-VI Gas Control Testing, Disassembly & Re pl a cement (Honeywell) The Bradford W hite DEFENDER Safety Sys tem ® GAS CONTROL REPLACE MENT Ste p 1. R ota te kno b of t he Gas Cont rol to th e “OFF ” pos iti on. Step 2. Turn off gas supply to water hea ter. Ste p 3. D isc onnec t gas sup ply l ine f rom Gas Cont rol. Ste [...]

SERVICE P ROCEDURE RG- VI Gas C ontrol Testing, Disassembly & Replacement (Honeywell) The Bradford White DEFENDER Safety System ® GAS CONTROL REPL ACEMENT b) Re att ac h ma in bu rn er f eed line , p il ot tu be, pie zo ig ni ter w ir e, i nne r do or wi re (re d) and t herm op il e wi re (white) to G as C o ntrol. Attach inner door wire (re d[...]

SERVICE PROCEDUR E RG-VI Gas Control Testing, Disassembly & Re pl a cement (Honeywell) The Bradford W hite DEFENDER Safety Sys tem ® GAS CONTROL REPLACE MENT Step 9. Reinstallation of inne r door assembly ( continued). d) F irm ly pl ace ri ght s ide in ner d oor fl ang e ag ains t th e le ft s ide inn e r door fla ng e a nd sec ur e wi th ( 2[...]

Step 1. W it h ma in bu rne r i n ope rat ion , re mov e r ight side i nne r door pe r SE RVIC E P ROC EDUR E I , s teps 3b & 3 c. Be s ure t o ma inta in wi re con nec tion to rese tta ble th erm al sw itch for th is ad justme nt p ro cedure . St ep 2. T o adju st fo r prop er bu rning, loo sen the air sh utte r nut , rot ate th e shu tter to [...]

Step 3. Fully ins pect i nner ga sket per SE RVICE PR OCEDURE RG-I, s tep 4 . Replac e gas ket if r equi red fol lowing SERVICE PROCEDURE I, ste ps 5 & 6. Step 4. Be certa in th at th ermo coupl e, p ilot tube a nd p iezo w ire a re rou ted b y i nner door f lange as s hown a nd R eins tall inne r door pe r SE RVIC E P ROC EDUR E RG -I, ste p 1[...]

Step 5 . Discon nect ( unscr ew) Main burner (ste el) f rom ma in burner or ifice or on ca st iron burner s (“C” burner), loo sen air shutter & dis conne ct (u nscre w) f eedli ne from bur ner. St ep 6. Remove ma in burner orif ice fro m fee d line. Insp ect and clean if neces sary . Step 7. Re move pilo t assemb ly, refer t o SERVICE PROCE[...]

Ste p 1. Remo ve ou ter j acket d oor . Step 2. Di sco nnect wire leads from res ettab le th erma l swit ch. Ste p 3. Using a mu ltim eter cap able o f mea surin g cont inui ty (O hms) , place o ne pr obe of mete r on o ne of th e bra ss con nec tion tabs of the r eset tabl e ther mal s wit ch, a nd the rema inin g p robe o n the other conn ectio n[...]

RESET TABLE THE RMAL SWITCH REP LACEMENT Ste p 1. Rota te kn ob o f c ombi nati on th ermo sta t ga s valv e to the o ff posi ti on. Step 2 . Rem ove ou ter jacket door. Step 3 . Disco nnect wire leads from re settab le ther mal sw it ch. Ste p 4. Remo ve re setta ble the rma l swi tch f rom inne r doo r (P hilli ps sc rew driv er) Step 5 . Place n[...]

SERVICE PROCEDU RE RG -IX Screen Lok ® Flame Arrestor Cleaning St ep 1. Rotat e knob of comb in atio n therm ostat g as v alve t o the o ff pos iti on. St ep 2. Remove ou te r jacket door. Step 3. R emo ve i nner do or pe r SER VIC E P ROCED URE RG- I, st ep 3 a thr ou gh 3e . Step 4. D isco nnec t ma in bu rner fe ed li ne, p il ot tu be and th e[...]

SERVICE PROCE DURE RG -X Dip Tube a nd Anode Inspection and R eplacement St ep 1. Rotat e kno b of com binatio n the rmost at/g as valv e to “O FF” p ositi on. Step 2. Tu rn of f co ld wate r su pply to hea ter. Co nne ct ho se to d rai n va lve of wate r he at er a nd r oute to a n o pen drai n. Open a near by hot water f aucet to ven t heat e[...]

St ep 1. Turn off wat er sup ply to w ate r heater . Rotat e kno b of com binat ion the rmost at/g as valv e to “O FF” pos ition . Step 2. Tu rn of f co ld wate r su pply to hea ter. Co nne ct ho se to dr ai n va lve of wa ter he ate r a nd rou te to a n op en dr ai n. Open a near by hot water f aucet to ven t heat er for drain ing. Op en dr ai[...]

1 Dra ft Hood 2 Hot W ater Outle t/Ano de 3 Col d Wate r I nlet T ube 4 Flue Baffle 5 T&P Relief Valve 6A Gas Control (Honeywe ll) 6B Gas Valv e (R obertsh aw) 6C Gas Valv e (Whi te Ro dger s) 7 Piez o Ign it er ( White R od gers /R obert sha w) 8 Brass Drain Valve 9 Scr ew-# 8- 18 x 3 /4 H ex Wash er He ad 10 Scr ew-# 10- 12 x 3/4 He x Was her[...]

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