Ultra Defender II Service Manual

(To be performed ONLY by qualified service providers)Save this manual for future referenceManual 47132A The Bradford WhiteRU150L*FRNU1504S*FRNU430T*F

THERMOPILE REPLACEMENTStep 1. Turn off gas supply to water heater. Rotate gas control knob to the “OFF” position.Step 2. Remove outer jacket door.Step

PILOT/ELECTRODE ASSEMBLY INSPECTION,CLEANING AND REPLACEMENTStep 1. Turn off gas supply to water heater. Rotate gascontrol knob to the “OFF” position.

IGNITER, ELECTRODE TESTING AND REPLACEMENTWith the pilot not in operation (no pilot flame) you can check the igniter and electrode circuit by viewing

Thermal Well TestingThermal well testingPosition gas control knob to the “OFF” position and disconnect thermal well harness from gas control.NYUsing a

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Gas Control & Thermal Well Removal From Water HeaterStep 1. Turn the gas control knob to the “OFF” position. Step 2. Drain heater to a point below

Gas Control Assembly to Thermal WellStep 6. Reconnect wire harnesses and igniter wire to gas control per the illustration to the left.Step 7. Reconnec

Step 1. Turn the gas control knob to the “OFF” positionStep 2. Disconnect the chamber sensor wire harness from the gas valve.Step 3. Remove the chamb

At periodic intervals (not more then 6 months) a visual inspection should be made of the main burner for proper operation and to insure no debris is a

The Bradford WhiteUltra Low NOx Gas Water HeatersPage Service Procedure Introduction 3 - - -Gas Control Troubleshooting Chart 5 - - -Tools Requi

Step 5. Disconnect (unscrew) manifold mount from feed line. Use a stiffbrush, compressed air and/or shop vacuum to remove any debris build up from the

Step 1. Remove outer jacket door.Step 2. Disconnect white wire leads from resettable thermal switch.Step 3. Using a multimeter capable of measuring co

SERVICE PROCEDURE ED-VIIResettable Thermal SwitchTesting and ReplacementRESETTABLE THERMAL SWITCH REPLACEMENTStep 1. Rotate gas control knob to the “O

SERVICE PROCEDURE ED-VIIIScreenLok Flame Arrestor CleaningStep 1. Rotate gas control knob to the “OFF” position.Step 2. Remove outer jacket door.Ste

SERVICE PROCEDURE ED-IXDip Tube and AnodeInspection and ReplacementPage 24Step 1. Rotate gas control knob to the “OFF” position.Step 2. Turn off cold

Step 1. Turn off water supply to water heater. Rotate gas control knob to the “OFF” position.Step 2. Turn off cold water supply to heater. Connect hos

1 Flue Baffle2 Hot Water Outlet/Anode3 Cold Water Inlet Tube4 T&P Relief Valve5 Thermal Well6 Brass Drain Valve7 Gas V

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The Bradford White ECO-DEFENDER Safety SystemThe Bradford White ECO-DEFENDER Safety System was designed to resist the ignition of flammable vapors tha

It is intended for this manual to be used by qualified service personal for the primary purpose of troubleshooting and repair of the Bradford White EC

Page 5LED Status Control Status Probable Cause Service ProcedureNone (LED not onor flashing)Gas valve is operating normally. Pilot flamemay not be pre

Page 6LED Status Control Status Probable Cause Service ProcedureFive flashesand three secondpause.Thermostat well fault. 1. Damage to thethermowell wi

Inner Door Removal ProcedureStep 1. Rotate the gas control knob to the “OFF” position.Step 2. Remove outer jacket burner access doorStep 3. Inner Do

Installation of Inner Door With Gasket.WARNINGStripped fastener connections may allow for seal breach of inner door. A seal breach may result in a fir

Step 10. Firmly place right side inner door flange against the burner door flange and secure with two ¼” drivescrews from step 3e. DO NOT OVER TIGHTEN