Bedienungsanleitung Bradford-White Corp UTW465S60FR*N

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  • Bradford-White Corp UTW465S60FR*N - page 1

    Save this manual for future reference Manual 238-48385-00A SERVICE MANUAL Troubleshooting Guide and Instructions for Service (To be performed ONLY by qua lified servi ce providers) Models Covered by This Manual: U1TW40S*FRN U1TW50S*FRN U1TW60T*FRN U2TW50T*FRN U2TW65T*FRN UTW450S60FR*N UTW465S60FR*N (*) Denotes Warra nt y Years Residential U ltr a L ...

  • Bradford-White Corp UTW465S60FR*N - page 2

    Page 2 Table of Contents Section Page Introduction ______________________________________________5 How to Use this Manual _____________________________________6 Tools Required for Service ___________________________________7 Specifications _____________________________________________8 Sequence of Operation _____________________________________ 12 ...

  • Bradford-White Corp UTW465S60FR*N - page 3

    WARNING If the information in these instructions is not followed exactly, a fire or ex- plosion may result causing property damage, personal injury, or death. What to do if you smell gas: x Do not try to light any appliance x Do not touch any electrical switch; do not use any phone in your build- ing x Immediately call your gas supplier from a neig ...

  • Bradford-White Corp UTW465S60FR*N - page 4

    Page 4 WARNING Water heaters are heat producing appliances. To avoid damage or injury, do not store materials against the water heater or any of its components. Use proper care to avoid unnecessary contact, especially by children, with the water heater and its components. Under no circumstances must flam- mable materials, such as gasoline or paint ...

  • Bradford-White Corp UTW465S60FR*N - page 5

    Page 5 The Bradford White ECO-DEFENDER Safety System ® The Bradford White ECO-DEFENDER Safety System was designed to resist the ignition of flammable vapors that can occur outside of the water heater and produce Ultra Low NOx emissions. Use and installation are nearly iden- tical to previous versions of atmospherically fired and vented water heate ...

  • Bradford-White Corp UTW465S60FR*N - page 6

    Page 6 diagnostic LED will flash a code to positively identify an operational issue. This service manual is designed to facilitate problem diagnosis and enhance service efficiency. To further promote quicker service tim es the new gas valve can be removed and replaced with- out draining the water heater. A special tool is required and will be provi ...

  • Bradford-White Corp UTW465S60FR*N - page 7

    Page 7 Contact the Bradford White technical support group immediately if diagnosis cannot be m ade using the methods described in this service manual. T ools Requir ed for Service Manometer: A liquid “U” tube type or a digital (magna-helic) typ e can be used. This device is used to measure gas and/or air pressure and vacuum. Multi-Meter: A digi ...

  • Bradford-White Corp UTW465S60FR*N - page 8

    Page 8 P ower Supply Dedicated 115VAC, 60 Hz, 15A. G as Supply Pipe Minimum 1/2” NPT (schedule 40 bl ack iron pipe recommended). A pproved Gas Type Natural Gas. G as Pressure 6.0” W.C. minimum, 11.0” W.C. maximum. Venting System Power vent through the wall or vertical through the roof. Approved Vent Materials PVC, CPVC or ABS. Minimum clearan ...

  • Bradford-White Corp UTW465S60FR*N - page 9

    Page 9 Vent Tables Venting Specificat ions for: 40 Gallon—40,000 BTU/hr. 50 Gallon—40,000 BTU/hr. 6 0 Gallon—42,000 BTU/hr. 2” Diameter (5.1 cm) PVC Vent Connector Lengths Terminating # of Elbows Maximum Straight L ength ft (m) Minimum Straight L ength ft (m) T hrough the Wall 1 45 (13.7) 2 (0.6) Through the Wall 2 40 (12.2) 2 (0.6) Through ...

  • Bradford-White Corp UTW465S60FR*N - page 10

    Page 10 Vent Tables Venting Specificat ions for: 48 Gallon—60,000 BTU/hr. 65 Gallon—60,000 BTU/hr. 3” Diameter (7.6 cm) PVC Vent Connector Lengths Terminating # of Elbows Maximum Straight Length ft (m) Minimum Straight Length ft (m) Through the Wall 1 55 (16.8) 2 (0.6) Through the Wall 2 50 (15.2) 2 (0.6) Through the Wall 3 45 (13.7) 2 (0.6) ...

  • Bradford-White Corp UTW465S60FR*N - page 11

    Page 11 Specifications Wiring Diagram Control Timings Ignition State Timing Pre-purge 15 s econds Trial for Ignition 90 seconds Flame Stabilization Period 3 seconds Inter-purge 15 s econds F lame Failure Response Time 1.5 seconds (2 second maximum, 1 second minimum) Post-purge 15 s econds PS Fault Delay (failed open/close) Retry after 2 minutes Sof ...

  • Bradford-White Corp UTW465S60FR*N - page 12

    Page 12 Power Up Sequence 1. Start-up: Upon power up, the gas control runs a safe start check with a typical delay of 5 seconds. 2. Flammable Vapor Verification: The gas control verifies that the Flamma- ble Vapor Sensor is in the proper operating range prior to energizing any components. If the sensor is within the proper range, the gas control re ...

  • Bradford-White Corp UTW465S60FR*N - page 13

    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 burner ignition. The gas control will ig- nore flame and pressure switch signals for 3 seconds to allow for the main burner to stabilize. 8. Steady State Operation: During steady state operation, the g ...

  • Bradford-White Corp UTW465S60FR*N - page 14

    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 8 times then 1 time with a three second pause. The error self clears if the resistance returns to nor- mal range for at least 15 seconds. 2. Temperature Sensor Fault: A) Temperature Sensor Open Circu ...

  • Bradford-White Corp UTW465S60FR*N - page 15

    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 waiting for the pressure switch and/or the blower temperature switch to close. If either switch does not close in 30 seconds, the blower turns off and the control flashes 3 times with a 3 second pause ...

  • Bradford-White Corp UTW465S60FR*N - page 16

    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 blower for 15 seconds (inter-purge) The gas control increments the recycle count, if the recycle count has not reached its limit (4), another trial for ignition begins. If the recycle count has bee ...

  • Bradford-White Corp UTW465S60FR*N - page 17

    Page 17 L ED S ta tus C ontr ol S ta tus P r oba bl e C a us e S e rv ic e P ro c e d ur e No ne ( L E D not on or fla s h in g) N o e le ct rica l p o w e r C o n t r o l p o w e r s w it ch in " O F F " posi t i on. Su pp l y vo l t a g e int e rru p te d . Tu rn P o w e r O n One s ho r t f l ash ev er y f our sec onds S tan d- by m od ...

  • Bradford-White Corp UTW465S60FR*N - page 18

    Page 18 L ED S ta tus C ontr o l S ta tus P r oba bl e C a use S er v i c e P ro c e d ur e Six fla s h e s , one f l a s h, thr e e s e c o nd paus e ( S o f t Lo c kou t) Fa ile d t o lig h t p ilo t , sy stem r eset s af t er (5 ) m i n u t e s 1. Unstabl e pi l ot 2. P il ot tub e b l o ck or r e s tr i cted 3 . O xid a t io n b u ild -u p o n ...

  • Bradford-White Corp UTW465S60FR*N - page 19

    Page 19 L ED Status Control Status Probable Cause Service Procedure Eight flashes, t hree flashes, three second pause Thermal well sensor damaged or un- plugged or gas con- t rol electronics fault detected 1. Damage to thermal well wires 2. Thermal well sensor resistance out of range 3. Replace thermal well 4. Verify control is not wet or physicall ...

  • Bradford-White Corp UTW465S60FR*N - page 20

    Page 20 Burner Inspection At periodic intervals (every 6 months), a visual inspection should be made of the pilot and main burner for proper operation and to assure no debris is accumulating. The pilot flame should be stable. Some causes for an unsta- ble pilot flame are: a) Gas pressure is out of specification. b) Pilot flame not fully engulfing s ...

  • Bradford-White Corp UTW465S60FR*N - page 21

    Page 21 Burner Cleaning Procedure (cont’d) Step 5. Remove the (4) 1/4” hex dri ve screws holding the right side inner door in place. Step 6. Remove the (3) 1/4” hex drive screws holding the left side burner door in place. Step 7. Disconnect the pilot tube using a 7/16” wrench and the main burner feedline with a 3/4” wrench from the gas co ...

  • Bradford-White Corp UTW465S60FR*N - page 22

    Page 22 Burner Cleaning Procedure (cont’d) Step 1 1. Thoroughly inspect burner screen and burner venturi and remove any loose debris accumu- lation. Inspect burner screen for any openings larger than the normal screen openings. Step 12. Use compressed air and/or a vacuum to remove any scale or other debris accumulation from the burner screen and ...

  • Bradford-White Corp UTW465S60FR*N - page 23

    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 the water heater. Step 4. Remove the outer door. Step 5. Remove the (4) 1/4” hex drive screws holding the right side inner door in place. Step 6. Disconnect the pilot tube using a 7/16” wrench and ...

  • Bradford-White Corp UTW465S60FR*N - page 24

    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 assembly from the main feedline using a 1/4" nut driver. Step 10. Visually inspect the spark igniter/flame sense wire for damage. Replace the pilot assembly, if damage is found. Step 11. With a ...

  • Bradford-White Corp UTW465S60FR*N - page 25

    Page 25 Pilot Inspection, Testing and Replacement (cont’d) Step 15. Inspect the pilot tubing and pilot orifice for blockages: a) Remove ferrule nut from the bottom of the pilot assembly using a 7/16" wrench. b) Remove the pilot tube and pilot orifice. c) Inspect the pilot tubing and pilot orifice for blockages. Clean or replace, as neces- sa ...

  • Bradford-White Corp UTW465S60FR*N - page 26

    Page 26 Pressure Switch Testing (cont’d) Pressure Switch Testing Pressure switch wire leads W ith steps 1,2 & 3 complete, discon- nect wire leads from pressure switch. Use a multi-meter set to the ohms setting. With blower off, check across the pres- sure switch termi- nals. Are the switch contacts open (no electrical continuity)? Position th ...

  • Bradford-White Corp UTW465S60FR*N - page 27

    Page 27 Pressure Switch Replacement Step 1. Move the gas control power switch to the “OFF” p osition. Step 2 . Remove the three screws (Phillips screw driver) from the control access cover on the blower as- sembly and remove cover. Step 3 . Carefully remove pressure switch from blower housing. Step 4. Disconnect tubing from the pressure switch. ...

  • Bradford-White Corp UTW465S60FR*N - page 28

    Page 28 Step 5 . Disconnect yellow wires from the pr es- sure switch. Step 6. Reconnect wires from step 5 to new pressure switch. Step 7. Reconnect tubing to new pressure switch. Step 8. Carefully position pressure switch into blower housing. Step 9. Position gas control power switch to the “ON” postion and verify proper heater operation. Step ...

  • Bradford-White Corp UTW465S60FR*N - page 29

    Page 29 Blower Testing (cont’d) Does blower energize within 2 minutes? Disconnect pr es- sure switch t ub- ing from blower (see photo 3). Connect manome- ter to pressure tap of blower (see photo 3). Disconnect v ent system from top of blower and remove vent adapter (see photo 5). Does blower e nergize after 2 minutes, ru n for 30 seconds and shut ...

  • Bradford-White Corp UTW465S60FR*N - page 30

    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. S t e p 3 . Disconnect vent system from exhaust adapter on top of blower. Step 4. Remove exhaust adapter from blower (blade screw driver) and retain for use on new blower. Step 5. Remove d ilution air c ...

  • Bradford-White Corp UTW465S60FR*N - page 31

    Page 31 Blower Installation (cont’d) Step 11. Secure blower in place using mounting screws from step 7. Step 12. Reinstall exhaust adapter from step 4. Step 13. Reinstall dilution air clip from step 5. Step 14. Reconnect vent system to exhaust adapter. Step 15. Reconnect cords from step 6. Step 16. Position gas control power switch to the “ON? ...

  • Bradford-White Corp UTW465S60FR*N - page 32

    Page 32 Blower Temperature Switch Testing (cont’d) S witch Setting Opens on rise @ approximately 165 o F A uto resets on fall @ approximately 160 o F Cool switch to below 160 o F Reconnect wire leads and ob- serve heater operation. Do exhaust gas temperatures rise to or above 170 o F with vent connected? Replace switch (see page 33). Disconnect w ...

  • Bradford-White Corp UTW465S60FR*N - page 33

    Page 33 Blower Temperature Switch Replacement Step 1. Move the gas control power switch to the “OFF” p osition. Step 2 . Remove the three screws (Phillips screw driver) from the control access cover on the blower as- sembly and remove cover. Step 3. Locate blower temperature switch. Step 4. Disconnect red and yellow wire leads from the switch. ...

  • Bradford-White Corp UTW465S60FR*N - page 34

    Page 34 Thermal Well Testing Follow the procedure, below, if the water heater gas control has gone into a ECO lock- out (4 flash, 3 second pause). Reset the gas control by rotating the setpoint knob to the minimum setting for at least 6 seconds before returning to the desired water tem- perature setting. Step 1. Unplug the thermal well connector fr ...

  • Bradford-White Corp UTW465S60FR*N - page 35

    Page 35 Thermal Well Testing (cont’d) Determine the correct resistance values using the Determine the Water Temperature Inside the Tank procedure on page 23. If the values are correct, replace the gas con- trol, otherwise replace the thermal well. Determine Water Temperature Inside Tank Note: It is important to understand once the resistance for ...

  • Bradford-White Corp UTW465S60FR*N - page 36

    Page 36 Sensor Resistance at Various Temperatures Gas Control & Thermal Well Removal From Water Heater Step 1. Move the gas control power switch to the “OFF” po- sition. Step 2. Unplug the water heater from the wall outlet. Step 3. Drain the water heater to a point below the gas control level. Step 4. Turn off the gas supply to the water he ...

  • Bradford-White Corp UTW465S60FR*N - page 37

    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 feedline with a 3/4” wrench from the gas control. Step 5. Disconnect the wire harnesses and spark igniter/ flame sense wire from the gas control. Step 6. Remove the gas control & thermal wel ...

  • Bradford-White Corp UTW465S60FR*N - page 38

    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 control. Step 4 . Disconnect the pilot tube using a 7/16” wrench and the main burner feedline with a 3/4” wrench from the gas control. Step 5. Disconnect the wire harnesses and spark igniter/ fl ...

  • Bradford-White Corp UTW465S60FR*N - page 39

    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 the thermal well flange with the tabs located on the back of the gas control. Step 4. Carefully push the gas control back onto the thermal well flange as far as possible towards the water heater. Then ...

  • Bradford-White Corp UTW465S60FR*N - page 40

    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 instruction label. Or, use the lighting instructions located in the water heater installation and operating manual. Flammable Vapor Sensor Testing Step 1. Move the gas control power switch to the “O ...

  • Bradford-White Corp UTW465S60FR*N - page 41

    Page 41 115 VAC Circuit Trace WARNING 115 volt potential exposure. Use caution making voltage checks to avoid personal injury. LED status: N one, control LED not on or flashing. LED status: S hort flash once every four seconds. LED status: “ Heartbeat”, alternates bright/dim. LED status: V arious flash- ing error codes. Waiting for call for hea ...

  • Bradford-White Corp UTW465S60FR*N - page 42

    Page 42 Safety Circuit Voltage Trace Note: This procedure assumes a cold tank. Step 1. Remove three screws (Phillips screw driver) from control access cover on blower and remove cover. Safety Circuit Voltage Trace WARNING 115 volt potential exposure. Use caution making voltage checks to avoid personal injury. Control access cover Position gas contr ...

  • Bradford-White Corp UTW465S60FR*N - page 43

    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. S t e p 2 . Unplug the water h e a t e r from the wall outlet. Step 3 . Disconnect the vent system from the exhaust adapter on top of blower. Step 4 . Unplug the cord sets from the blower. Step 5. Remove the three bl ...

  • Bradford-White Corp UTW465S60FR*N - page 44

    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 restrictors. Clean any scale or debris build-up. Replace with a new baffle, as necessary. Step 9. Reinstall the baffle into the flue. Be sure the baffle hanger tab is inserted into the notch locations at the ...

  • Bradford-White Corp UTW465S60FR*N - page 45

    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 deformation, or uninten- tional holes are not field repairable and the inlet nipple/diptube must be replaced. Step 7. Upon com pletion of the inspection or subsequent replacement, reinstall the i nlet n ...

  • Bradford-White Corp UTW465S60FR*N - page 46

    Page 46 Step 8. To resume operation, follow the instructions located on the water heater lighting instruction label. Or, use the lighting instructions located in the water heater installation and operating manual. Inner Door Removal Procedure Step 1. Move the gas control power switch to the “OFF” po- sition. Step 2. Unplug the water heater from ...

  • Bradford-White Corp UTW465S60FR*N - page 47

    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. Remove the flammable vapor sensor from the clip by pushing down on the tab to open the clip. Step 8. Inspect both inner doors for any of the following imperfections: tears, missing material, crack ...

  • Bradford-White Corp UTW465S60FR*N - page 48

    Page 48 inner door gasket to the inner door sections. Refer to the illustration for proper applica- tion. Note the overlap configuration in the flange area of the inner door. Set the flange section first, and this will help to achieve the proper overlap position. Inner Door Installation with Gasket Step 1. Clean any residual gasket residue or other ...

  • Bradford-White Corp UTW465S60FR*N - page 49

    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-install the outer door. Step 9. To resume operation, follow the instructions located on the water heater lighting instruction label. Or, use the lighting instructions located in the water heater installa ...

  • Bradford-White Corp UTW465S60FR*N - page 50

    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 Diode NPT National Pipe Thread Ohms Ohms of resistance PSI Pounds per Square Inch RPM Revolutions per Minute VAC Volts Alternating Current W.C. Inches of Water Column °C Degrees C entigrade °F Degrees F ahren ...

  • Bradford-White Corp UTW465S60FR*N - page 51

    Page 51 Parts List 3 3 32 3 0 39 34 3 5 36 29 18 3 1 2 1 20 1 2 3 4 5 12 1 3 9 10 1 1 1 4 1 5 1 9 2 2 2 3 2 7 28 7 25 24 6 26 16 1 7 29 1 8 1 8 18 18 40 37 38 Part Name and Description 1. Blower Complete 15. T&P Valve 29. Burner Assembly 2. Air Mixing Inlet 16. Outer Door 30. Flexible Gas Feedline 3. Pressure Switch 17. Right Si de Inner Door 3 ...

  • Bradford-White Corp UTW465S60FR*N - page 52

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

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