Instruction/ maintenance manual of the product D38T155 Bradford-White Corp
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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 Man.
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 .
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.
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.
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 .
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.
° 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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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 .
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 G.
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However, one of the most important roles played by the user manual is to help in solving problems with Bradford-White Corp D38T155. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Bradford-White Corp D38T155 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
