Bradford White Defender RG130T Series Service Manual
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Bradford White Defender RG130T Series Service Manual

Flammable vapor ignition resistant water heaters
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Flammable Vapor Ignition Resistant
Manual 238-51542-00C REV 08/19
Water Heaters
SERVICE
MANUAL
and Instructions for Service
(To be performed ONLY by
qualified service providers)
Models Covered
by This Manual:
RG130T*(N,X)
RG140T*(N,X)
RG150T(N,X)
RG140S*(N,X)
RG150L*(N,X)
RG150S*(N,X)
LG255H*(N.X)
LG275H*(N,X)
LG250H65*(N,X)
RG2100H*(N,X)
(*) Denotes Warranty Years
Save this manual for future reference
RG230S*(N,X)
RG230T*(N,X)
RG240S*(N,X)
RG240T*(N,X)
RG250H*(N,X)
RG250L*(N,X)
RG250S*(N,X)
RG250T*(N,X)
RG250H*(N,X)
RG255H*(N,X)
RG275H*(N,X)

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Summary of Contents for Bradford White Defender RG130T Series

  • Page 1: Water Heaters

    Flammable Vapor Ignition Resistant Water Heaters SERVICE MANUAL Troubleshooting Guide and Instructions for Service (To be performed ONLY by qualified service providers) Models Covered by This Manual: RG130T*(N,X) RG230S*(N,X) RG140T*(N,X) RG230T*(N,X) RG150T(N,X) RG240S*(N,X) RG140S*(N,X) RG240T*(N,X) RG150L*(N,X) RG250H*(N,X) RG150S*(N,X) RG250L*(N,X) LG255H*(N.X) RG250S*(N,X) LG275H*(N,X) RG250T*(N,X)
  • Page 2 The Bradford White DEFENDER Safety System ® Flammable Vapor Ignition Resistant Water Heaters Table of Contents Service Page Procedure … Introduction………………………………………………………………………… …...4 Troubleshooting Charts…………………………………………………………….…...6 Inner Door Gasket Removal, Inspection, and Replacement…………………… …..12 RG-I Thermocouple/Thermopile Testing and Replacement………………………….…..15 RG-II Pilot Assembly Inspection Cleaning and Replacement……………………………..18 RG-III Piezo Igniter, Electrode Testing and Replacement……………………………..…..19...
  • Page 3 WARNING: If the information in these instructions is not followed DANGER exactly, a fire or explosion may result in property damage, personal DO NOT store or use gasoline or injury, or death. other flammable, combustible, or corrosive vapors and liquids in the vicinity of this or any other appliance For Your Safety Do not store or use gasoline or other flammable, combustible, or...
  • Page 4 The following information will instruct service professionals on the function, proper diagnosis and repair of water heaters employing the Bradford White DEFENDER Safety System.

  • Page 5: Tools Required For Service

    In some difficult to diagnose conditions, it may be necessary to isolate the heater from the vent system to determine the problem. Contact the Bradford White technical support group immediately if diagnosis cannot be made using the methods described in this service manual.
  • Page 6 White Rodgers Mechanical Gas Control Troubleshooting Chart Flammable Vapor Ignition Resistant Water Heaters Service Symptom Probable Cause Corrective Action Procedure 1. No incoming gas or too low 1. Turn on gas supply and/or check gas pressure. 2. Gas control knob set to line pressure.
  • Page 7 White Rodgers Mechanical Gas Control Troubleshooting Chart Flammable Vapor Ignition Resistant Water Heaters Service Symptom Probable Cause Corrective Action Procedure 1. Verify adequate combustion air is available to the unit. Check and clear jacket slot openings of 1. Insufficient combustion air any dirt, dust, restrictions or Pilot goes out supply.
  • Page 8 White Rodgers Electronic Gas Control Troubleshooting Chart Flammable Vapor Ignition Resistant Water Heaters Observe green LED indicator on gas control. Status flash codes are displayed with a three second pause before repeating. Check and repair the system as noted in the troubleshooting table below. LED Status Control Status Probable Cause...
  • Page 9 Honeywell V1 Gas Control Troubleshooting Chart Flammable Vapor Ignition Resistant Water Heaters Observe green LED indicator on gas control. Status flash codes are displayed with a three second pause before repeating. Check and repair the system as noted in the troubleshooting table below. LED Status Control Status Probable Cause...
  • Page 10 Honeywell V1 Gas Control Troubleshooting Chart Flammable Vapor Ignition Resistant Water Heaters Observe green LED indicator on gas control. Status flash codes are displayed with a three second pause before repeating. Check and repair the system as noted in the troubleshooting table below. LED Status Control Status Probable Cause...
  • Page 11 Honeywell V2 Gas Control Troubleshooting Chart Flammable Vapor Ignition Resistant Water Heaters Observe colored LED indicator on gas control. Status flash codes are displayed with a three second pause before repeating. Check and repair the system as noted in the troubleshooting table below. LED Status Control Status Probable Cause...
  • Page 12 SERVICE PROCEDURE RG-I Inner Door/Gasket Removal, Inspection, and Replacement Inner Door Removal Procedure Step 1. Rotate knob of the combination thermostat/gas valve to the “OFF” position. Step 2. Remove the outer jacket burner access door. Step 3. Inner Door Removal: a) Disconnect resettable thermal switch wire leads (leading from gas control/gas valve).
  • Page 13 SERVICE PROCEDURE RG-I Inner Door/Gasket Removal, Inspection, and Replacement Installation of Inner Door with Gasket WARNING Step 1. Clean any residual gasket residue or other Stripped fastener connections may allow debris from combustion chamber surface for seal breach of inner door. A seal before installing the inner door/gasket breach may result in a fire or explosion assembly.
  • Page 14 SERVICE PROCEDURE RG-I Inner Door/Gasket Removal, Inspection Replacement and Reinstallation Step 4. Firmly place right side inner door flange against the left side inner door flange and secure with two (2) 1 / 4 ” hex drive screws from Step 3c. DO NOT OVER TIGHTEN SCREWS. Step 5.
  • Page 15 SERVICE PROCEDURE RG-II Thermocouple/Thermopile Testing and Replacement CLOSED CIRCUIT THERMOCOUPLE TESTING (White Rodgers Mechanical) Step 1. Closed circuit testing is the preferred method for testing the thermocouple. Following the lighting instruction label on the heater, proceed to light the pilot and allow to operate for three minutes. If the pilot will not stay lit, hold the pilot button (located on the combination thermostat/gas valve) down during this test.
  • Page 16 SERVICE PROCEDURE RG-II Thermocouple/Thermopile Testing and Replacement OPEN CIRCUIT THERMOCOUPLE TESTING (White Rodgers Mechanical) Disconnect the thermocouple from the Step 1. combination thermostat/gas valve. Step 2. Using a multimeter capable of measuring millivolts, connect one alligator clip to the end ball or contact portion of the thermocouple and the other alligator clip to copper portion of the thermocouple.
  • Page 17 SERVICE PROCEDURE RG-II Thermocouple/Thermopile Testing and Replacement OPEN CIRCUIT THERMOPILE TESTING (Honeywell & White Rodgers Electronic) Step 1. Turn knob to pilot position and depress. Step 2. Continue pressing knob and remove the red (+) wire from resettable thermal door switch. Step 3.
  • Page 18 SERVICE PROCEDURE RG-III Pilot Assembly Inspection, Cleaning and Replacement PILOT/ELECTRODE ASSEMBLY INSPECTION, CLEANING, AND REPLACEMENT Step 1. Turn off gas supply to water heater. Rotate the knob of gas control/gas valve to the “OFF” position. Step 2. Remove the outer jacket door. Step 3.
  • Page 19 SERVICE PROCEDURE RG-IV Piezo Igniter, Electrode Testing and Replacement 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 through the sight glass located on the inner door and observing the spark action. Step 1.
  • Page 20 SERVICE PROCEDURE RG-V Gas Valve Testing and Replacement (White Rodgers Mechanical) GAS VALVE TESTING AND REPLACEMENT (White Rodgers Mechanical) The gas valve is a non-repairable device. If troubleshooting has determined a problem with the gas valve, it must be replaced. If the burner and/or pilot do not function, service checks for gas pressure, thermocouple output, magnet assembly, and ECO are to be performed.
  • Page 21 SERVICE PROCEDURE RG-V Gas Valve Testing and Replacement (White Rodgers Mechanical) MAGNET ASSEMBLY TESTING (White Rodgers Mechanical Control) Step 1. Following the lighting instruction label on the heater, proceed to light the pilot and allow to operate for three minutes. If the pilot will not stay lit, hold the pilot button (located on the gas valve) down during this test.
  • Page 22 SERVICE PROCEDURE RG-V Gas Valve Testing and Replacement (White Rodgers Mechanical) COMBINATION THERMOSTAT/GAS VALVE REPLACEMENT Rotate the knob of the gas valve to the “OFF” position. Step 1. Turn off gas supply to the water heater. Step 2. Disconnect the gas supply line from the gas valve. Step 3.
  • Page 23 SERVICE PROCEDURE RG-V Gas Valve Testing and Replacement (White Rodgers Mechanical) Step 7. Removal of gas valve: a) Disconnect the main burner feedline, pilot tube and thermocouple from the gas valve. Remove the burner from combustion chamber. NOTE: Feed line nut for natural gas control uses right hand threads; L.P.
  • Page 24 SERVICE PROCEDURE RG-V Gas Valve Testing and Replacement (White Rodgers Mechanical) Step 9. Reinstallation of inner door assembly (cont.): b) Clean any gasket residue or other debris from combustion chamber surface before installing the inner door/gasket assembly. c) Position thermocouple, pilot tube and piezo wire against left side inner door flange gasket. DO NOT ROUTE THROUGH RADIUSED CHANNEL WITH FEEDLINE.
  • Page 25 SERVICE PROCEDURE RG-VI Gas Control Testing, Disassembly, & R eplacement (White Rodgers Electronic & Honeywell) LINE PRESSURE The gas valve is designed for a maximum line pressure of 14.0" W.C., and a minimum line pressure based on the manifold pressure plus 1.0" W.C. (check rating plate for rated manifold pressure).
  • Page 26 SERVICE PROCEDURE RG-VI NOTE: The following procedure applies Gas Control Testing, Disassembly, & R eplacement (Honeywell ONLY) to the Honeywell gas control ONLY. HONEYWELL COVER REMOVAL CAUTION Use caution to not bend or damage Step 1. Rotate the knob of the gas control to the “OFF” position. valve body pins when removing or Step 2.
  • Page 27 SERVICE PROCEDURE RG-VI Gas Control Testing, Disassembly, & R eplacement (Honeywell ONLY) HONEYWELL COVER REMOVAL (cont.) Step 7. Disconnect the temperature sensor from the control board and remove the wire from the temperature sensor wire routing clip. Temperature sensor wire routing clip Disconnect temperature sensor Step 8.
  • Page 28 SERVICE PROCEDURE RG-VI Gas Control Testing, Disassembly, & R eplacement (Honeywell ONLY) HONEYWELL VALVE BODY REMOVAL AND TEMPERATURE SENSOR REMOVAL CAUTION Step 1. Disconnect the burner and pilot tubes per Service Procedure RG-II. Step 2. Remove the valve body by removing the screw located at the lower left Use caution to not corner.
  • Page 29 SERVICE PROCEDURE RG-VI Gas Control Testing, Disassembly, & R eplacement (Honeywell ONLY) HONEYWELL VALVE BODY REMOVAL AND TEMPERATURE SENSOR REMOVAL (cont.) Step 4. Remove the temperature sensor from the insertion stick by pulling apart as illustrated below. Temperature sensor Pull in this direction Insertion stick Pull in this direction Step 5.
  • Page 30 SERVICE PROCEDURE RG-VI Gas Control Testing, Disassembly, & R eplacement (Honeywell ONLY) TEMPERATURE SENSOR TESTING (Honeywell) Step 1. If control has gone into lockout due to excessive tank temperature (four CAUTION flashes, three second pause), reset DO NOT use standard multimeter probes control by rotating gas control knob to for this test.

  • Page 31: Determine Water Temperature Inside Tank

    SERVICE PROCEDURE RG-VI Gas Control Testing, Disassembly, & R eplacement (Honeywell ONLY) WARNING Stored water may be HOT when performing the following steps in this procedure. Take necessary precaution to prevent personal injury. DETERMINE WATER TEMPERATURE INSIDE TANK NOTE: It is important to understand once the resistance for the temperature sensor is determined from the previous page, water flow through the water heater should not occur.
  • Page 32 SERVICE PROCEDURE RG-VI Gas Control Testing, Disassembly, & R eplacement (White Rodgers Electronic & Honeywell) ______________________________________________________________________________________________________________________________________ GAS CONTROL REPLACEMENT Step 1. Rotate knob of the gas control to the “OFF” position. Step 2. Turn off gas supply to the water heater. Step 3.
  • Page 33 SERVICE PROCEDURE RG-VI Gas Control Testing, Disassembly, & Replacement (White Rodgers Electronic & Honeywell GAS CONTROL REPLACEMENT (cont.) Step 8. Install new gas control into water heater (cont.): b) Reattach the main burner feedline, pilot tube, piezo igniter wire, inner door wire (red), and thermopile wire (white) to the gas control.
  • Page 34 SERVICE PROCEDURE RG-VI Gas Control Testing, Disassembly, & Replacement (White Rodgers Electronic & Honeywell GAS CONTROL REPLACEMENT (cont.) Step 9. Reinstallation of inner door assembly (cont.): d) Firmly place right side inner door flange against the left side inner door flange and secure with two (2) 1/4”...
  • Page 35 Under NO circumstances should 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 deactivated. If flammable vapors are present, a fire or explosion may result causing property damage, personal injury, or death.

  • Page 36: Burner Cleaning

    SERVICE PROCEDURE RG-VII Burner Operation Inspection, Adjustment, Cleaning, and Replacement BURNER CLEANING Step 4. Disconnect the burner plate from main burner orifice and disconnect feedline from burner. Step 5. Remove main burner orifice from feed line. Inspect and clean if necessary. Remove pilot assembly, refer to Service Procedure RG-III for cleaning and inspection.
  • Page 37 SERVICE PROCEDURE RG-VIII Resettable Thermal Switch Testing and Replacement RESETTABLE THERMAL SWITCH CONTINUITY TESTING Step 1. Remove the outer jacket door. Step 2. Disconnect the wire leads from the resettable thermal switch. Step 3. Using a multimeter capable of measuring continuity (ohms), place one probe of meter on one of the brass connection tabs of the resettable thermal switch, and the remaining probe on the other connection tab.
  • Page 38 SERVICE PROCEDURE RG-VIII Resettable Thermal Switch Testing and Replacement RESETTABLE THERMAL SWITCH REPLACEMENT Step 1. Rotate the knob of combination thermostat/gas valve to the “OFF” position. Step 2. Remove the outer jacket door. Step 3. Disconnect the wire leads from the resettable thermal switch.
  • Page 39 SERVICE PROCEDURE RG-IX ® ScreenLok Flame Arrestor Cleaning ® ScreenLok Flame Arrestor Cleaning Step 1. Rotate knob of combination thermostat gas valve to the off position. Step 2. Remove the outer jacket door. Step 3. Remove inner door per Service Procedure RG-I, Steps 3a through 3e. Step 4.

  • Page 40: Diptube Inspection And Replacement

    SERVICE PROCEDURE RG-X Diptube and Anode Inspection and Replacement DIPTUBE INSPECTION AND REPLACEMENT WARNING Heater components and stored water may be HOT when performing the following steps in this procedure. Take necessary precaution to prevent personal injury. Rotate the knob of combination thermostat/gas valve to “OFF” position. Step 1.

  • Page 41: Anode Inspection And Replacement

    SERVICE PROCEDURE RG-X Diptube and Anode Inspection and Replacement ANODE INSPECTION AND REPLACEMENT WARNING Heater components and stored water may be HOT when performing the following steps in this procedure. Take necessary precaution to prevent personal injury. Step 1. Turn off water supply to water heater. Rotate knob of combination thermostat/gas valve to “OFF”...
  • Page 42 Parts Diagram Draft Hood 17 Burner Only Hot Water Outlet/Anode 18 Main Burner Orifice Cold Water Inlet Tube 19 Pilot Assembly Flue Baffle 20 Pilot Orifice T&P Relief Valve 21 Thermocouple/Thermopile 6A Gas Control (Honeywell V1) 22 Complete Burner Assembly (LP) 6B Gas Control (Honeywell V2) 23 Burner Only (LP) 6C Gas Control (White Rodgers Mechanical)

This manual is also suitable for:

Defender rg140t seriesDefender rg150l seriesDefender rg150t seriesDefender lg275h seriesDefender rg150s seriesDefender lg255h series ... Show all

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