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Bradford-White Corp D38T155 manual

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Table of contents for the manual

  • Page 1

    Save this manual for future reference Manual 47324A SERVICE MANUAL Troubleshooting Guide and Instructions for Service (To be performed ONLY by qua lified servi ce providers) Models Covered by This Manual: For The Bradford White “D” Series Models: D38T155 D75T(125,160,300) D65T(370,399) D80T(180,199,250) D80T(425,505) D100T(199,250) D80L(399,450[...]

  • Page 2

    Table of Con ten ts Page eF Serv ice Pr ocedure Introduction 3 - - - To ol re qui red for s er vi ce 3 - - - Seq uence of O pera tion 4 - - - T roubl es hoo t ing 5 - - - Thermostat Circuit Testing 6 D2 4 -I Pilot Operation Testing 8 D24-II Main Burner Operation testing 10 D24-III Main Burner & Pilot Removal & Inspection 12 D24-IV Flue Baf [...]

  • Page 3

    Tools Requir ed for Service It is intend ed for this m anual to be us ed by qualifie d service per sonal for the p r imar y purpose of troubl eshooting anal ysis and repai r of the Bradfo rd White 24 Vo lt Flue Damper Series W ater Heater. Un der standi ng the sequence of operation s ec tion of th is manual will c ontribute greatly to troublesh oot[...]

  • Page 4

    1 Therm osta t cal ls f or hea t. The r elay cl oses on the th ermos tat boar d, sendi ng 24 volts fr om the “COM” te rminal of the th ermos tat boar d to the fl ue da mper. 2 Flue damp er beg ins to rota te open. O nce damp er is full open , 24 volts is all owed to conti nue thr ough damp er to the “ TH” termi nal of ign ition module. 3 LE[...]

  • Page 5

    TROUBLESHOOTING If LED o n ign ition mo dule i s f lashi ng, reset water h eate r by turn ing “ OFF” powe r. Wa it 5 sec onds a nd tu rn p owe r back “ON” R ota te th ermostat di al to the h ig hest s etting . Does dam per va ne Move to the f ul l o pen pos iti on? Doe s LED light on ig niti on modu le illuminate? Is th ere pi lot fla me? D[...]

  • Page 6

    SERVICE PROCEDURE D24-I Therm o st at Circu it Testing CAUTI ON Be Careful Wh en Making Vo ltage Measurem en ts or Ju mping Terminals Not to Damage or Deform Conn e ctor s or Connect or Pins. DANGER 120 volt ex posure. To avoid p e rsonal injury, use caut ion while perform in g th is procedure. T HE RMOS TAT C IRCUIT BY-P ASS T urn pow er “OF F?[...]

  • Page 7

    ° F 0123456 78 9 40 26 10 9 2 5400 2 4712 2 4045 23 399 22 771 22 163 215 73 210 00 204 45 50 19 90 6 1 9383 1 8876 1 8383 17 905 17 440 16 990 165 53 161 28 157 15 60 15 31 4 1 4925 1 4548 1 4180 13 823 13 477 13 140 128 12 124 94 121 85 70 11 884 115 92 113 08 11032 10 763 10 502 10 248 10 00 976 0 9526 80 9299 9078 8 862 8 653 844 9 8250 8057 7[...]

  • Page 8

    SERVICE PROCEDURE D24-II Pilot Operation Testing CAUTI ON Be Careful Wh en Making Vo ltage Measurem en ts or Ju mping Terminals Not to Damage or Deform Conn e ctor s or Connect or Pins. DANGER 120 volt ex posure. To avoid p e rsonal injury, use caut ion while perform in g th is procedure. Condition: Pilot will no t light, Ignit ion modul e LED i s [...]

  • Page 9

    SERVICE PROCEDURE D24-II Pilot Operation Testing CAUTI ON Be Careful Wh en Making Vo ltage Measur ements or Jump ing Terminals Not to Damage or Deform Conn e ctor s or Connect or Pins. DANGER 120 volt ex posure. To avoid p e rsonal injury, use caut ion while perform in g th is procedure. Condition: Pilot lights, no flame signal. Mod ule con tinue s[...]

  • Page 10

    SERVICE PROCEDURE D24-III Main Bur ner Operatio n T esting CAUT ION Be Careful Wh en Making Vo ltage Measurem en ts or Ju mping Terminals Not to Damage or Deform Conn e ctor s or Connect or Pins. DANGER 120 volt ex posure. To avoid p e rsonal injury, use caut ion while perform in g th is procedure. Condition: Main burner will not lig h t, I gnit io[...]

  • Page 11

    SERVICE PROCEDURE D24-III Main Burner Operation Testing CAUTION Be Careful Wh en Making Vo ltage Measur ements or Jump ing Terminals Not to Damage or Deform Conn e ctor s or Connect or Pins. DANGER 120 volt ex posure. To avoid p e rsonal injury, use caut ion while perform in g th is procedure. Condition: Main b urner s hort cycle C heck gas ( l in [...]

  • Page 12

    SERVICE PROCEDURE D24-IV Main Burn e r & Pilot Removal and Inspection WARNING Heate r compone nts may be HOT w hen perfo r m i n g the f ollow ing ste ps in t his proce dure. Take nece ssary pr ecaution to pre vent personal in jury. Main B urner Removal Step 1. Dis connect (un-plug) w ater heater fro m elec trical su pply. Step 2. Tur n “OFF?[...]

  • Page 13

    SERVICE PROCEDURE D24-IV Main Burn e r & Pilot Removal and Inspection P ilot Burner Removal Step 1. With bu rner rack rem oved from heater, dis connect pilot tube conn ection from gas valve Step 2. Rem ove the two p ilot burner mounting s c rew s secu ring the pi lot and pi lot shield in place. S tep 3. Remove pilot shi eld and p ilot from bur [...]

  • Page 14

    SERVICE PROCEDURE D24-V Flue Baffle Removal, Inspecti o n S tep 1. Discon nect (unpl ug) water h eater from el ectrical sup ply. Step 2. Dis connect venting f rom dra ft diverter and rem ove draft d ivert er from top of wa ter hea ter. S tep 3. Discon nect flue damper fr om wir e harness and remove flu e damper from top of water h eater. Step 4. If[...]

  • Page 15

    Pag e 15 SERVICE PROCEDURE D24-VI Anode R emoval and Inspectio n S tep 1. Discon nect (unpl ug) water h eater from el ectrical sup ply. Step 2. Turn “ OFF” water su pply to wate r heater. S tep 3. Open a near by hot water fauce t to reliev e tank pres sure. Step 4. Con nect hose to drain v alve of wate r heater and ro ute to an op en drain. O p[...]

  • Page 16

    Pag e 16 Ge neric Part s List 1. D raft Diverter w /Leg Kit. 2. D raft Diverter. 3. D raft Div erter Le g. 4. D amper Out let Redu cer. 5. Flue D amper. 6. H ot Outlet N i pple. 7. C old Water Inl e t D ip T ube. 8. H ex Head Anode . 9. Flue B affle. 10. Fl ue Reducer. 11. Flue C o re. 12. 1" x ¾" Reducer B ushin g. 13. Nipple T&P Va[...]

  • Page 17

    Ge neric Part s List 1A. Draft Pan e l. 2A. Burner Rack. 3A. Burner Tube. 4A. Gas V alve. 5A. Burner Manifold. 6A. Main Burne r Orifice . 7A. Pilo t Shield. 8A. Pilo t Burner. 9A. Pilo t O ri fice. 10A. Pil ot Tubing. 11A. P i lot Mounting S crew . 12A. B u rner Tub e Suppor t. 13A. Mani fold Bracke t. 14A. C-Cane Mani fold. 15A. Manifold St raight[...]

  • Page 18

    Ge neric Part s List 1C. Temperature C ont rol Kno b. 2C . Po te nt iom ete r G as ket . 3C. Potentiomet er (Temperat ure Co ntrol). 4C. 7/8" Snap Bush ing. 5C. Tem pe rature Scale Plate. 6C . Con tr ol Box Pa nel . 7C. Terminal Stri p. 8C. G rou nd Terminal . Pag e 18 9C. Power Cord train Relie f Bushing. 10C. Power Co rd. 11C . Pilo t wire S[...]

  • Page 19

    NOTES Pag e 19 Glos sary of Te rm s AC Alternati ng Current BTU/H British Ther mal Un i ts CO Carbon Monoxide CO2 Carbon Dioxide DC Direct Curr ent ECO Ener gy Cut O ff GFI Grou nd fault inter r upt GPM Gallons per Minute Hz Hertz LED Li ght Emitting Di ode NOx Oxides of Nitrogen NPT National Pipe Thr ead PSI Pounds per Squa r e I nc h VA Volt Amps[...]

  • Page 20

    Email parts@bradfordwhite.com techserv@bradfordwhite.com www .bradfordwhite.com[...]