Bradford White 50T65F Service Manual
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Bradford White 50T65F Service Manual

Bradford White 50T65F Service Manual

Bradford-white corp flammable vapor ignition resistant water heater service manual
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Flammable Vapor Ignition Resistant Water Heater
Manual 44943C
The Bradford White
and Instruction for Service
(To be performed ONLY by qualified service providers)
Defender Safety System
MI30T*F(BN,CX)
MI30S*F(BN, CX)
MI303T*F(BN,CX)
MI40T*F(BN,CX)
MI403S*F(BN,CX)
MI404T*F(BN,CX)
MI503*F(BN,CX)
MI50L*F(BN,CX)
MI504S*F(BN,CX)
MI60T*F(BN,CX)
Save this manual for future reference
SERVICE
MANUAL

Troubleshooting Guide

For the Bradford White
M430T*F(BN,CX)
M440T*F(BN, CX)
M4403S*F(BN,CX)
M4403T*F(BN,CX)
M450S*F(BN,CX)
M4503*F(BN,CX)
M460T*F(BN,CX)
M1XR403S*F(BN,CX)
M1XR504T*F(BN,CX)
M2XR504T*F(BN,CX)
M2C504T*F(BN,CX)
50T65F(BN,CX)
(*) Denotes Warranty Years.
®
Models:

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Summary of Contents for Bradford White 50T65F

  • Page 1: Troubleshooting Guide

    For the Bradford White Defender Safety System MI30T*F(BN,CX) MI30S*F(BN, CX) MI303T*F(BN,CX) MI40T*F(BN,CX) MI403S*F(BN,CX) MI404T*F(BN,CX) MI503*F(BN,CX) MI50L*F(BN,CX) MI504S*F(BN,CX) MI60T*F(BN,CX) Save this manual for future reference ® Models: M430T*F(BN,CX) M440T*F(BN, CX) M4403S*F(BN,CX) M4403T*F(BN,CX) M450S*F(BN,CX) M4503*F(BN,CX) M460T*F(BN,CX) M1XR403S*F(BN,CX) M1XR504T*F(BN,CX) M2XR504T*F(BN,CX) M2C504T*F(BN,CX) 50T65F(BN,CX) (*) Denotes Warranty Years.

  • Page 2: Table Of Contents

    Introduction Trouble shooting Chart Inner Door Gasket Removal, Inspection, Replacement and Installation Thermocouple Testing and Replacement Pilot Assembly Inspection Cleaning and Replacement Piezo Igniter and Electrode Testing Combination Thermostat/Gas Valve Testing and Replacement Burner Operation Inspection, Adjustment, Cleaning and Replacement Resettable Thermal Switch Testing and Replacement ScreenLok ®...

  • Page 3: Introduction

    ® was designed to resist the ignition of flammable vapors that can occur outside of the water heater. Use and installation are nearly identical to previous versions of atmospherically fired and vented water heaters. A number of exclusive design features are incorporated in the system that will require additional knowledge on the part of the qualified service provider.

  • Page 4: Troubleshooting Chart

    1. Combination thermostat/gas valve set too low for desired water temperature. 2. Cold inlet water temperature is very cold. 3. High demand periods. Not enough hot 4. Incorrectly sized water heater for application. water 5. Combination thermostat/gas valve is out of calibration/not functioning.

  • Page 5: Inner Door Gasket Removal, Inspection, Replacement And Installation

    Inner Door Removal Procedure Step 1. Rotate knob of the combination thermostat/gas valve to the “OFF” position. Step 2. Remove outer jacket burner access door Step 3. Inner Door Removal. a) Disconnect resettable thermal switch wire leads (leading from combination thermostat/gas valve). b) Remove (2) 1/4"...
  • Page 6 Do not over tighten screws in steps 8, 10 and 11. If a fastener connection is stripped, contact the manufacturer listed on the water heater rating plate. Position thermocouple, pilot tube and piezo wire.
  • Page 7 Step 10. Firmly place right side inner door flange against the left side inner door flange and secure with two ¼” drive screws from step 3c. DO NOT OVER TIGHTEN SCREWS. Step 11. Align right side inner door to combustion chamber and verify the fastener holes of the combustion chamber are aligned with the right side inner door slotted opening.

  • Page 8: Thermocouple Testing And Replacement

    CLOSED CIRCUIT THERMOCOUPLE TESTING (White Rodgers Control) Step 1. Closed circuit testing is the preferred method for testing thermocouple. Following the lighting instruction label on the heater, proceed to light the pilot and allow to operate for three minuets. If the pilot will not stay lit, hold the pilot button (located on the combination thermostat/gas valve) down during this test Step 2.
  • Page 9 A reading of 20 to 30 millivolts indicates good thermocouple output. THERMOCOUPLE REPLACEMENT Step 1. Turn off gas supply to water heater. Rotate knob of combination thermostat/gas valve to “OFF” position. For White Rodgers Control, depress knob slightly and rotate clockwise to the “OFF”...

  • Page 10: Pilot Assembly Inspection Cleaning And Replacement

    PILOT/ELECTRODE ASSEMBLY INSPECTION, CLEANING AND REPLACEMENT Step 1. Turn off gas supply to water heater. Rotate knob of combination thermostat/gas valve to “OFF” position. Step 2. Remove outer jacket door. Step 3. Remove right side of inner door per SERVICE PROCEDURE RG-I, steps 3a through 3c.

  • Page 11: Piezo Igniter And Electrode Testing

    PIEZO IGNITER, ELECTRODE TESTING AND REPLACEMENT With the pilot not in operation (no pilot flame) you can check the Piezo and electrode circuit by viewing pilot thru the sight glass located on the inner door and observing the spark action. Step 1.

  • Page 12: Combination Thermostat/Gas Valve Testing And Replacement

    The combination thermostat/gas valve is designed for a maximum line pressure of 14.0" w.c. and a minimum line pressure of 1.0"w.c. over the water heater rated manifold pressure. Line pressure must be checked with burner on and burner off to assure proper readings.
  • Page 13 THERMOCOUPLE TESTING See SERVICE PROCEDURE RG-II MAGNET ASSEMBLY TESTING (White Rodgers Control) Step 1. Following the lighting instruction label on the heater, proceed to light the pilot and allow to operate for three minuets. If the pilot will not stay lit, hold the pilot button (located on the combination thermostat/gas valve) down during this test Step 2.
  • Page 14 Step 2. Turn off gas supply to water heater. Step 3. Disconnect gas supply line from combination thermostat/gas valve. Step 4. Turn off water supply and drain water heater completely. Step 5. Remove outer jacket burner access door. Step 6. Right side inner door removal.
  • Page 15 Step 7. Removal of combination thermostat/gas valve. a) Disconnect main burner feedline (¾” wrench), pilot tube (7/16" wrench) and thermocouple (3/8" wrench) from combination thermostat/gas valve & remove burner from combustion chamber. NOTE: Feed line nut for natural gas control uses right hand threads, LP control uses left hand thread.
  • Page 16 Reconnect gas supply to Combination Thermostat/Gas Valve. Step 13. Resume water supply to water heater. Be sure tank is full of water. Step 14. To resume operation follow the instructions located on the lighting instruction label or the lighting instructions located in the installation and operation manual.

  • Page 17: Burner Operation Inspection, Adjustment Cleaning And Replacement

    17). CAST IRON BURNER ADJUSTMENT Under no circumstances shall flammable materials be used or stored in the vicinity of the water heater. With the inner door removed the Bradford White Defender Safety System will be inactivated. If flammable vapors are present, a fire or explosion may result causing property damage, personal injury or death.
  • Page 18 MAIN BURNER: Inspection, Adjustment, Cleaning and Replacement (cont.) Step 3. Fully inspect inner gasket per SERVICE PROCEDURE RG-I, step 4. Replace gasket if required following SERVICE PROCEDURE I, steps 5 & 6. Step 4. Be certain that thermocouple, pilot tube and piezo wire are routed by inner door flange as shown and Reinstall inner door per SERVICE PROCEDURE RG-I, step 10 and 11.
  • Page 19 BURNER CLEANING (Cont.) Step 5. Disconnect (unscrew) Main burner (stamped steel “B” burner) from main burner orifice or on cast iron burners (“C” burner), loosen air shutter & disconnect (unscrew) feedline from burner. Step 6. Remove main burner orifice from feed line (½” wrench on steel burner, 3/8"...

  • Page 20: Resettable Thermal Switch Testing And Replacement

    1. Replace resettable thermal switch 2. Verify switch color code and approximate temperature. 1. Replace water heater. Resetting Thermal Switch Testing and Replacement Resettable thermal switch color code reference. Approximate switch...
  • Page 21 RESETTABLE THERMAL SWITCH REPLACEMENT Step 1. Rotate knob of combination thermostat gas valve to the off position. Step 2. Remove outer jacket door. Step 3. Disconnect wire leads from resettable thermal switch. Step 4. Remove resettable thermal switch from inner door (Phillips screw driver) Step 5.

  • Page 22: Screenlok Flame Arrestor Cleaning

    ® ScreenLok Flame Arrestor Cleaning Step 1. Rotate knob of combination thermostat gas valve to the off position. Step 2. Remove outer jacket door. Step 3. Remove inner door per SERVICE PROCEDURE RG-I, step 3a through 3e. Step 4. Disconnect main burner feed line (¾ wrench), pilot tube (7/16 wrench) and thermocouple (3/8) wrench from combination thermostat gas valve and remove burner assembly from combustion chamber.

  • Page 23: Dip Tube And Anode Inspection And Replacement

    Step 2. Turn off cold water supply to heater. Connect hose to drain spigot of water heater and route to an open drain. Open a nearby hot water faucet to vent heater for draining. Open drain spigot of hot water heater and allow heater to drain to a point below the inlet connection nipple.

  • Page 24: Rg-Ix

    Step 2. Turn off cold water supply to heater. Connect hose to drain spigot of water heater and route to an open drain. Open a nearby hot water faucet to vent heater for draining. Open drain spigot of hot water heater and allow heater to drain to a point below the outlet connection nipple.

  • Page 25: Generic Parts List

    Draft Hood Hot Water Outlet/Anode Cold Water Inlet Tube Flue Baffle T&P Relief Valve Thermostat Piezo Igniter Brass Drain Valve Screw-#8-18 x 3/4 Hex Washer Head 10 Screw-#10-12 x 3/4 Hex Washer Head 11 Left Side Inner Door with Gasket 12 Complete Right Side Inner Door 14 Resettable Thermal Switch 15 Screw #6-20 x 3/8 PHCR...
  • Page 26 NOTES...
  • Page 27 NOTES...
  • Page 28 Application & Sizing/800-523-2931 Fax/215-641-1612 Email parts@bradfordwhite.com techserv@bradfordwhite.com www.bradfordwhite.com www.bradfordwhitecanada.com...

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