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The Bradford White

ECO

DEFENDER

Safety System

Ultra Low NOx Gas Water Heaters

Page

ED Service Procedure

Introduction ................................................................................................................................ 4

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How to Use This Manual .......................................................................................................... 5

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Tools Required for Service ....................................................................................................... 5

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Troubleshooting ......................................................................................................................... 6

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Burner Operation Inspection, Cleaning & Replacement ....................................................... 8

ED-I

Pilot Inspection, Testing & Replacement ................................................................................ 10

ED-II

Gas Control Testing & Replacement ....................................................................................... 11

ED-III

Chamber Sensor Testing ........................................................................................................... 14

ED-IV

Thermopile Testing and Replacement ..................................................................................... 15

ED-V

Igniter, Electrode Testing and Replacement ........................................................................... 16

ED-VI

Resettable Thermal Switch Testing and Replacement ........................................................... 17

ED-VII

Diptube Inspection and Replacement ...................................................................................... 19

ED-VIII

Anode Inspection & Replacement ........................................................................................... 20

ED-IX

Inner Door Removal, Inspection & Replacement .................................................................. 21

ED-X

Flue Baffle Inspection & Replacement .................................................................................... 24

ED-XI

ScreenLok® ............................................................................................................................... 25

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Glossary of Terms ..................................................................................................................... 26

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Parts List ..................................................................................................................................... 27

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Содержание URG130T*N Series

Страница 1: ...ng Guide and Instructions for Service To be performed ONLY by qualified service providers Models Covered by This Manual URG230T N URG240S N URG240T N URG250L N URG250H N URG250T N URG130T N URG140T N...

Страница 2: ...Replacement 10 ED II Gas Control Testing Replacement 11 ED III Chamber Sensor Testing 14 ED IV Thermopile Testing and Replacement 15 ED V Igniter Electrode Testing and Replacement 16 ED VI Resettable...

Страница 3: ...sional for more information WARNING FAILURE TO INSTALL AND MAINTAIN A NEW LISTED X TEMPERATURE AND PRESSURE RELIEF VALVE WILL RELEASE THE MANUFACTURER FROM ANY CLAIM THAT MIGHT RESULT FROM EXCESSIVE T...

Страница 4: ...Ox emissions Additional air is drawn through the openings in the jacket This air travels down and around the combustion chamber and enters through holes in the bottom of the corrosion resistant combus...

Страница 5: ...type or a digital magnahelic type can be used This device is used to measure gas and or air pressure and vacuum A digital type is strongly recommended This device is used to measure electrical values...

Страница 6: ...setting If the set point knob is already at the desired setting temperature demand is satisfied no call for heat LED strobe two quick flashes and three second pause Thermostat calling for heat no faul...

Страница 7: ...d pause Chamber temperature sensor out of specification Possible short 1 Chamber temperature sensor out of calibration 2 Possible short Seven flashes and three second pause Gas valve electronic fault...

Страница 8: ...ot and burn with a blue flame with a minimum of yellow tips Main burner must be free from any debris accumulation that may affect burner operation see burner cleaning procedure below Burner Cleaning S...

Страница 9: ...or a shop vaccuum Step 10 Unscrew main burner orifice and feedline from manifold mount Remove main burner orifice from feedline 1 2 wrench inspect orifice clean or replace if necessary Step 11 Reassem...

Страница 10: ...igniter flame sense wire Replace pilot if no continuity Step 12 Visually inspect igniter flame sense electrode for deterioration Replace pilot as necessary Electrode should not be in contact with pilo...

Страница 11: ...ct manometer to pressure tap Step 4 Follow instructions located on the lighting instructions label and proceed to light the main burner and observe manometer reading Step 5 Proper manifold pressure op...

Страница 12: ...llon and immediately measure water temperature using an accurate thermometer It may be necessary to open a hot water faucet to allow heater to drain Step 3 Compare the measured water temperature with...

Страница 13: ...Step 7 Disconnect pilot tube from gas control and move away from gas control Step 8 Removal gas control from water heater by rotating counter clockwise DO NOT use a wrench on the gas control body dama...

Страница 14: ...e see caution into each of the wire positions see photo Step 5 Measure the ambient air temperature near the sensor Compare the ambient temperature range to the expected resistance range on the chart b...

Страница 15: ...s replace the pilot assembly per service procedure ED II on page 10 Open Circuit Thermopile Testing Step 1 Disconnect red thermopile wire from wire harness leading to the gas control Disconnect the wh...

Страница 16: ...ight glass If a spark is present the circuit is OK If there is no spark proceed to step 3 Step 3 Remove white wire from igniter Hold the igniter lead from the gas control to an unpainted surface such...

Страница 17: ...to pass Step 5 If continuity is not indicated the switch is open possibly due to an overheating condition The switch is designed to open at predetermined temperatures An open switch can be reset by de...

Страница 18: ...rmal switch in place Be sure contact surface of resettable thermal switch and manifold mount are free of any debris Secure resettable thermal switch into place using screws from step 6 DO NOT OVER TIG...

Страница 19: ...le diptube The Inlet nipple diptube should be free of cracks and any blockages The Hydrojet slots should be open and free of any blockages Any damage such as cracks restriction due to deformation or u...

Страница 20: ...spect the outlet nipple anode The outlet nipple anode should show signs of depletion this is normal If depletion is of the original anode diameter approximately diameter replacement is recommended If...

Страница 21: ...flange section of inner door Step 6 Remove 2 drive screws from left side inner door Step 7 Remove inner door and inspect per step 8 Step 8 Fully inspect inner door gaskets for the following Tears Oth...

Страница 22: ...ket Step 11 Clean any residual gasket residue or other debris from the combustion chamber surface before installing the inner door gasket assembly Step 12 Place the left side inner door into position...

Страница 23: ...on chamber are aligned with right side inner door slotted opening Verify seal integrity around combustion opening Secure right side inner door using hex drive screws from step 4 DO NOT OVER TIGHTEN SC...

Страница 24: ...ny scale or debris build up Replace with a new baffle as necessary Step 6 Reinstall baffle into the flue tube Be sure hanger tabs are inserted into the notch locations at the top of the flue tube see...

Страница 25: ...cuum to remove any scale or other debris accumulation Using a soft brush clear jacket openings from any dirt dust restrictions or other obstructions Step 6 Remove any debris from burner assembly per p...

Страница 26: ...er Minute Hz Hertz kWh Kilowatt hour LED Light Emitting Diode NPT National Pipe Thread Ohms Ohms of resistance PSI Pounds per Square Inch RPM Revolutions per minute ECO Energy Cut Out VAC Volts Altern...

Страница 27: ...only 9 Burner Ass y complete 10 Main Burner Feedline 11 Resettable Thermal Switch 12 Main Burner 13 Pilot Assembly 14 Pilot Orifice 15 Right Side Inner Door Ass y 16 Thermal Switch Harness 17 Manifold...

Страница 28: ......

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