Bradford White UTW465S60FR*N Service Manual

Save this manual for future referenceManual 238-48509-00ASERVICEMANUALTroubleshooting Guideand Instructions for Service(To be performed ONLY byqualifi

Page 10 Vent Tables Venting Specifications for:48 Gallon 65 Gallon 3” Diameter (7.6 cm) PVC Vent Connector Lengths Terminating # of ElbowsMaximum Str

Page 11 SpecificationsWiring DiagramControl TimingsIgnition State Timing Pre-purge 15 seconds Trial for Ignition 90 seconds Flame Stabilization Per

Page 12 Power Up Sequence1. Start-up: Upon power up, the gas control runs a safe start check with a typical delay of 5 seconds. 2. Flammable Vapor Ve

Page 13 Normal Heating Sequence (cont’d) 7. Main Burner Ignition: After pilot flame is sensed, the gas control acti-vates the main valve for main bur

Page 14 Abnormal Operation (cont’d) B) If the resistance is below 3000 ohms: The gas control immediately turns off all outputs and proceeds to flash

Page 15 Abnormal Operation (cont’d)B) Pressure switch or blower temperature switch failed to close: The gas control runs the blower for 30 seconds wa

Page 16 Abnormal Operation (cont’d)5. Flame Sensing Fault: A) Flame Lost During Run: The gas control turns off the pilot and main valves and runs the

Page 17 LED Status Control Status Probable Cause Service ProcedureNone (LEDnot on orflashing)No electrical powerControl power switch in "OFF&quo

Page 18 LED Status Control Status Probable Cause Service ProcedureSix flashes,one flash,three secondpause (SoftLockout)Failed to light pilot,system r

Page 19 LED Status Control Status Probable Cause Service Procedure Eight flashes, three flashes, three secondpauseThermal well sensor damaged or u

Page 2 Table of Contents Section PageIntroduction ______________________________________________5 How to Use this Manual ____________________________

Page 20 Burner InspectionAt periodic intervals (every 6 months), a visual inspection should be made of the pilot and main burner for proper operation

Page 21 Burner Cleaning Procedure (cont’d) Step 5. Remove the (4) 1/4” hex drive screws holding the right side inner door in place. Step 6. Remove

Page 22 Burner Cleaning Procedure (cont’d) Step 11. Thoroughly inspect burner screen and burner venturi and remove any loose debris accumu-lation. I

Page 23 Pilot Inspection, Testing and Replacement (cont’d)Step 2. Unplug the water heater from the wall outlet. Step 3. Turn off the gas supply to

Page 24 Pilot Inspection, Testing and Replacement (cont’d)Step 8. Remove the burner assembly from the com-bustion chamber. Step 9. Remove the pilot

Page 25 Pilot Inspection, Testing and Replacement (cont’d)Step 15. Inspect the pilot tubing and pilot orifice for blockages: a) Remove ferrule nut f

Page 26 Pressure Switch Testing (cont’d) Pressure Switch Testing Pressure switch wire leads With steps 1,2 & 3 complete, discon-nect wire leads f

Page 27 Pressure Switch Replacement Step 1. Move the gas control power switch to the “OFF” position. Step 2. Remove the three screws (Phillips sc

Page 28 Step 5. Disconnect yellow wires from the pres-sure switch.Step 6. Reconnect wires from step 5 to new pressure switch. Step 7. Reconnect tu

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WARNINGIf the information in these instructions is not followed exactly, a fire or ex-plosion may result causing property damage, personal injury, or

Page 30 Blower Removal Step 1. Move the gas control power switch to the “OFF” position.Step 2. Unplug the water heater from the wall out-let.Step 3

Page 31 Blower Installation (cont’d) Step 11. Secure blower in place using mounting screws from step 7.Step 12. Reinstall exhaust adapter from st

Page 32 Blower Temperature Switch Testing (cont’d)Switch SettingOpens on rise @ approximately 165oFAuto resets on fall @ approximately 160oFCool swit

Page 33 Blower Temperature Switch Replacement Step 1. Move the gas control power switch to the “OFF” position. Step 2. Remove the three screws (P

Page 34 Thermal Well TestingFollow the procedure, below, if the water heater gas control has gone into a ECO lock-out (4 flash, 3 second pause). Res

Page 35 Thermal Well Testing (cont’d)Determine the correct resistance values using the Determine the Water Temperature Inside the Tank procedure on p

Page 36 Sensor Resistance at Various TemperaturesGas Control & Thermal Well Removal From Water Heater Step 1. Move the gas control power switch

Page 37 Gas Control & Thermal Well Removal From Water Heater (cont’d)Step 4. Disconnect the pilot tube using a 7/16” wrench and the main burner

Page 38 Gas Control Removal From Thermal Well (cont’d)Step 3. Turn off the gas supply to the water heater and disconnect the gas piping from the gas

Page 39 Gas Control Assembly to the Thermal Well (cont’d) Step 2. Route the wire leads back into relief opening. Step 3. Align the slots located on

Page 4 WARNINGWater heaters are heat producing appliances. To avoid damage or injury, do not store materials against the water heater or any of its

Page 40 Gas Control Assembly to the Thermal Well (cont’d) Step 8. To resume operation, follow the instructions located on the water heater lighting

Page 41 115 VAC Circuit Trace WARNING115 volt potential exposure. Use caution making voltage checks to avoid personal injury.LED status: None, contro

Page 42 Safety Circuit Voltage Trace Note: This procedure assumes a cold tank. Step 1. Remove three screws (Phillips screw driver) from control acce

Page 43 Remove the Blower to Gain Access to the Flue Baffle Step 1. Move the gas control p o w e r switch to the “OFF” position. Step 2. Unplug th

Page 44 water heater. Remove the Blower to Gain Access to the Flue Baffle (cont’d)Step 8. Inspect the baffle for deterioration and missing restricto

Page 45 be free of cracks and any blockage. Hydro-jet slots should be open and free of any blockage. Any damage, such as cracks, restriction due to

Page 46 Step 8. To resume operation, follow the instructions located on the water heater lighting instruction label. Or, use the lighting instructi

Page 47 Step 6. Remove the connectors attached to the re-settable thermal switch on the manifold mount. Inner Door Removal Procedure (cont’d)Step 7.

Page 48 inner door gasket to the inner door sections. Refer to the illustration for proper applica-tion. Note the overlap configuration in the flan

Page 49 screws. Verify that both the left and right side inner doors are properly positioned and sealed against the combustion chamber. Step 8. Re

Page 5 The Bradford White ECO-DEFENDER Safety System®The Bradford White ECO-DEFENDER Safety System was designed to resistthe ignition of flammable va

Page 50 Common Terms BTU British Thermal Units ECO Energy Cut Off GPM Gallons per Minute Hz Hertz KWh Kilowatts per hour LED Light Emitting Di

Page 51 Parts List 33323039343536291831212012345121391011141519222327287252462616172918181818403738Part Name and Description1. Blower Complete 15. T&

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Page 6 operating parameters exists, the gas control diagnostic LED will flash a code to positively identify an operational issue.This service manual

Page 7 Contact the Bradford White technical support group immediately if diagnosis cannot be madeusing the methods described in this service manual.

Page 8 Power Supply Dedicated 115VAC, 60 Hz, 15A. Gas Supply Pipe Minimum 1/2” NPT (schedule 40 black iron pipe recommended).Approved Gas Type Natu

Page 9 Vent Tables Venting Specifications for:40 Gallon 50 Gallon 60 Gallon 2” Diameter (5.1 cm) PVC Vent Connector Lengths Terminating # of ElbowsMa