Bradford White W2504T Service Manual Download Page 40 | Manualshive

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Summary of Contents for W2504T

Page 1: ...3S F BN CX SX MI404T F BN CX SX MI503 F BN CX SX MI50L F BN CX SX MI504S F BN CX SX MI60T F BN CX SX C S D W2504T F BN CX SX M430T F BN CX SX M440T F BN CX SX M4403S F BN CX SX M4503 F BN CX SX M460T...

Page 2: ...Assembly Inspection Cleaning and Replacement 13 RG III Piezo Igniter Electrode Testing and Replacement 14 RG IV White Rodgers Robertshaw Gas Valve Testing and Replacement 15 RG V Honeywell Gas Contro...

Page 3: ...ttom of the corrosion resistant combustion chamber The air then travels up through the oriented flame arrestor plate louvers where the velocity of the air is increased and its direction altered The ai...

Page 4: ...embly 6 Replace Piezo igniter 1 Check connection at combination thermostat gas valve Proper tightness should be finger tight plus turn 2 Inspect thermocouple to ensure that it is fully engaged into pi...

Page 5: ...ure 2 Unstable pilot 3 Pilot tube block or restricted 4 Resettable thermal switch has opened Service Procedure If the pilot will not stay lit replace pilot assembly If problem persists replace Gas Con...

Page 6: ...ol is wet or physically damaged Pilot valve stuck in open position Service Procedure 1 See service procedure RG VI 1 Reset Gas Control 2 Replace Gas Control Replace Gas Control Flammable Vapor Ignitio...

Page 7: ...If the information in these instructions is not followed exactly a fire or explosion may result causing property damage personal injury or death Step 5 After inspection of inner door as noted in step...

Page 8: ...side inner door into position first Firmly position the radiused channel of the inner door aroundthe feedline Using the 2 hex drive screws from step 3d secure left side inner door in place DO NOT OVE...

Page 9: ...of the inner door are properly positioned and sealed against the combustion chamber Step 12 Reconnect lead wires from combination thermostat gas valve to resettable thermal switch See photo in step 3...

Page 10: ...lve Alligator clip to copper sheath of thermocouple Step 1 Disconnect thermocouple from combination thermostat gas valve Step 2 Connect a thermocouple adaptor BWC P N 239 44642 00 Robertshaw P N 75036...

Page 11: ...RVICE PROCEDURE RG I Step 10 through Step 13 Step 8 To resume operation follow the instructions located on the lighting instruction label or the lighting instructions located in the installation and o...

Page 12: ...ground location jacket base screw etc OPEN CIRCUIT THERMOPILE TESTING Honeywell Gas Control Normal thermopile operation will be between 350mV 850mV If reading is less than 350mV replacement of pilot a...

Page 13: ...age must be cleaned or replaced Honeywell pilot orifice not replaceable replace pilot assembly Step 10 Install pilot electrode assembly to feedline secure with screw from step 7 Step 11 Re Install bur...

Page 14: ...line or gas valve and depress the Piezo igniter If there is a spark the igniter is OK the pilot is not functioning and must be replaced see SERVICE PROCEDURE RG III for pilot replacement If no spark i...

Page 15: ...on If pressure is out of the specification noted in step 5 proceed to step 7 or 8 for proper service procedure Step 7 For White Rodgers control the manifold pressure is not adjustable If manifold pres...

Page 16: ...of 6 millivolts the magnet is out of specification and the gas valve should be replaced MAGNET ASSEMBLY TESTING Robertshaw Control Step 1 Disconnect thermocouple from gas valve Step 2 Connect a therm...

Page 17: ...ection Hex Drive Screws shown on Right Side Inner Door Hex Drive Screws at Flange section of Inner Door Remove Wire Tie For White Rodgers Control depress knob slightly and rotate clockwise to the OFF...

Page 18: ...Reattach Piezo bracket with Piezo igniter to gas valve c Reattach main burner feedline pilot tube and thermocouple to gas valve NOTE Feedline nut for natural gas control uses right hand threads LP con...

Page 19: ...combustion chamber are aligned with the right side inner door slotted openings Verify seal integrity around combustion opening Secure right side inner door using 2 hex drive screws from step 6b DO NOT...

Page 20: ...as Control is designed so that any of these components may be replaced without replacing the entire Gas Control LINE PRESSURE The Gas Control is designed for a maximum line pressure of 14 0 w c and a...

Page 21: ...and pressure tap and replace pressure tap plug Check for gas leaks prior to placing water heater back into operation by following the instructions located on the lighting instruction label or the lig...

Page 22: ...e Ohms setting determine the resistance of temperature sensor see caution and photos above Replace Gas Control Once the temperature sensor resistance values are known the water temperature must also b...

Page 23: ...In Degrees F Sensor Resistance at Various Temperatures Example If temperature of water is 84 F then the resistance through the sensor would be 8449 see shaded area NOTE Sensor resistance increases as...

Page 24: ...s supply line from Gas Control Step 4 Disconnect piezo igniter wire Step 5 Remove inner door assembly following SERVICE PROCEDURE RG I steps 1 through 3c Step 6 Remove Gas Control cover screw Rotate k...

Page 25: ...SASSEMBLY REASSEMBLY Step 8 Disconnect temperature sensor from control board and remove wire from the temperature sensor wire routing clip Disconnect temperature sensor Step 9 Remove the piezo igniter...

Page 26: ...lling temperature sensor and insertion stick make sure the assembly is inserted FULLY into the backplate and the wires are routed through the wire routing clips Failure to do so will not allow valve b...

Page 27: ...l in this direction Pull in this direction Step 13 To reassemble Gas Control follow the previous steps in reverse order Once Gas Control is reassembled burner assembly is reinstalled and the gas suppl...

Page 28: ...et material on inner door Rotate knob counter clockwise to the OFF position Resettable Thermal Switch Wire Connection Hex Drive Screws Right and Left Side Inner Door Hex Drive Screws at Flange Area of...

Page 29: ...fully inspect inner door gasket for the following Tears Gasket Adhesion to inner door Missing Material Other imperfections that will inhibit proper seal Cracks Material left on combustion chamber Dir...

Page 30: ...left and right sides of the inner door are properly positioned and sealed against the combustion chamber Step 10 Reconnect 2 red wire leads from pilot assembly and Gas Control to resettable thermal s...

Page 31: ...ips Steel burner models have a self adjusting air mixture and do not have an adjustable air shutter Cast iron burner can have the gas and air mixture properly proportioned by adjusting the air shutter...

Page 32: ...RNER Inspection Adjustment Cleaning and Replacement cont Position thermocouple thermopile pilot tube and Piezo wire BURNER CLEANING Steel Cast Iron Step 1 Remove inner door assembly per SERVICE PROCED...

Page 33: ...or to reinstallation of burner assembly If cleaning is required refer to SERVICE PROCEDURE RG VIII Step 10 Reinstall burner assembly into combustion chamber reconnect feedline thermocouple and pilot t...

Page 34: ...ned prior to putting the heater back in service RESETTABLE THERMAL SWITCH CONTINUITY TESTING PROBABLE CAUSE FOR RESETTABLE THERMAL SWITCH ACTIVATION PROBABLE CAUSE CORRECTIVE ACTION Insufficient combu...

Page 35: ...TEN SCREWS Step 6 Reconnect wire leads from combination thermostat gas valve to resettable thermal switch Note Wire termination are interchangeable with either resettable thermal switch connection Ste...

Page 36: ...lear jacket openings of any dirt dust restrictions or other obstructions Step 6 Remove any debris from burner assembly per SERVICE PROCEDURE RG V and reinstall burner assembly into combustion chamber...

Page 37: ...ottom of nipple should be free of any blockage Any damage such as cracks restriction due to deformation or unintentional holes are not field repairable and the inlet nipple dip tube must be replaced S...

Page 38: ...is recommended If any of thesteel core of the anode is exposed replacement is recommended Step 6 Upon completion of inspection or subsequent replacement reinstall outlet nipple anode into heater Conne...

Page 39: ...tch 15 Outer Door 16 Complete BN Burner Assembly Natural 17 BN Burner Only 18 Main Burner Orifice 19 Pilot Assembly 20 Pilot Orifice 21 Thermocouple Thermopile 22 Complete SX Burner Assembly LP 23 SX...

Page 40: ...Email parts bradfordwhite com techserv bradfordwhite com www bradfordwhite com...

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