Bradford-White Corp EF100T250(E)*(N, X)(A)(2) service manual Flame Sensor Testing Procedure, Gasket

Page 62

Flame Sensor Testing Procedure

WARNING

120 volt potential exposure. Use caution

making voltage checks to avoid

personal injury. Flame sensor may be

too hot to handle, take necessary

precautions

 

 

 

 

 

Refer to ignition module/control board

 

 

Refer to illustration below, is there

 

 

illustration.(24 volts should maintain beyond the

 

 

Y

 

1.5 second flame proving period.)

Y

Flame sensing circuit OK

a minimum of 1 micro amp during

 

Hot Surface Ignition Models:

 

 

 

1.5 second flame proving period?

 

 

Is there 24 volts AC at locations P3(2) & P3(5)?

 

 

 

 

 

 

 

Direct Spark Ignition Models:

 

 

N

 

 

 

 

Is there 24VAC between P5(5) and P5(8)?

 

 

 

 

 

 

Replace flame sensor with

N

 

 

With flame sensor Disconnected

 

Call for

 

 

from ignition module, check

 

Y

 

gasket

 

 

 

 

and/or wire lead.

technical support

 

 

continuity to ground.

 

 

 

 

 

Is there continuity to ground?

 

(see “Flame Sensor

 

 

 

N

 

 

 

Replacement Procedure”)

 

 

 

 

 

 

 

 

 

 

 

Remove flame sensor from water heater.

 

 

 

 

 

Check continuity from tip of flame sensor N

 

 

Volt meter set to

 

 

to end of wire lead.

 

 

 

 

Micro amps setting

 

 

Is there continuity?

 

 

 

 

 

 

 

 

 

 

(µA)

 

 

Y

 

 

 

 

 

 

 

 

 

N

 

Meter

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

probe

 

 

 

Is flame sensor free

Y

Is ceramic of flame

 

 

 

 

of oxidation?

 

sensor cracked?

Flame

 

 

 

 

 

 

 

 

 

 

 

N

 

 

Y

 

sensor

 

 

 

 

 

 

terminal

Meter

Flame sensor

 

 

 

 

 

 

 

 

 

 

 

 

probe

Clean or replace

 

 

 

 

 

terminal on

 

Replace flame sensor.

 

 

 

flame sensor.

 

 

 

 

ignition module.

(see “Flame Sensor

 

(see “Flame Sensor

 

 

 

 

 

 

Replacement

 

 

HOT SURFACE IGNITION MODELS

Replacement

 

 

 

 

 

 

Procedure”)

 

 

Procedure”)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Meter probe

Flame sensor

terminal

Volt meter set to

Micro amps setting

(µA)

CONTROL BOARD

 

 

 

 

 

 

3

 

1

2

 

 

 

 

2

 

 

 

 

 

1

6

3

 

 

1

1

3

8

5

 

 

 

 

 

1

2

3

 

 

5

 

4

1

 

 

3

 

1

 

 

 

 

 

 

4

 

J1

P5

P4

P9

P10

P2

P3

P7

Flame sensor

terminal onMeter probe control board.

DIRECT SPARK IGNITION MODELS

62

 

62

Page 61 Page 63
Image 62
Page 61 Page 63
Contents Service Manual Bradford White Page Page Page Dimensions Inches Page Page PVC, Cpvc For models prior to CF serial numbers Wiring Diagram Ignition Module For models starting with CF serial numbers and later Wiring Diagram Ignition Module Page CONNECTION/WIRING Diagram Harness to switch Replace switchRepair/replace wire Light burned outPressure Switch See Thermostat Circuit Only power light Is on and water heater Will not functionSwitch. see Exhaust Pressure Switch See Blower TestingSystem Observation For models with Direct Spark Ignition DisplayBlower. Is 110-120 VAC present? From previousReplace blower Section Combustion SystemPressing Select button will change display to next mode Max Setpoint value Water Heater Display Setpoint Display/Change Software Version Display only Max Setpoint continues to flash while making adjustments ExitingSELECTServiceSETMode To Display Flame Sense Current of the Pilot Flame Sensor Select SET Setpoint Idle Status Operational Idle Status Operational Error Codes and Error History Display To view previous error codes ExitingSELECTServiceSETMode Honeywell Integrated Control Error Code Resetting Error Codes in Hard Lockout Condition Unplug or disconnect electrical power to the water heater NextDo not operate water heater without Replace harness OK, thermostat is Calling for heatSee Thermostat Sensor See Thermostat PotentiometerAppendix a Red Wires Temperature Sensor Refer to ignition moduleThermostat Board Replacement Procedure Hot Surface Ignition Wiring DiagramThermostat Potentiometer Replacement Procedure Disconnected using a multi-meterThermostat Sensor Thermister Replacement Procedure Volt potential exposure. IsolateGas pressure. Is it stable Venturi Adjustment Inlet gas Pressure tapSupply piping Heater not running See illustrations at rightSee Ignition Module Clear obstructionLight? Minimum ¾ NPT. Schedule 40 black Iron PipeRecommended Refer to control board illustration Control BoardBurner mounting Screw Total Combustion System Removal ProcedureGas valve Wire harness Gas Connection PVC vent connectionCombustion System Replacement Procedure GasBurner Tube Removal Procedure Burner Tube Replacement Procedure Burner Tube InspectionGas Valve Replacement Procedure Is collector high limit switch Control board For Direct Spark Black wires atBlack wire leading to Black & White WiresBlower Replacement Procedure Is there continuity Through RED Only power LED is on, or Purge LED flashingReset button Refer to Check Collector Pressure See next See photo below Check Purge LED status On ignition moduleEF60,100T199 +2.58 EF100T150 +1.50 Check Collector PressureCheck exhaust collector pressure at the exhaust EF60T150,EF100T250 +1.22 EF60T125 +2.08 EF100T300 +0.55Exhaust pipe Pressure tap location Exhaust Pressure Switch Replacement ProcedureExhaust collector Reset button Switch operationError code 29 again? Support Energize?Vent tables Check Exhaust Tube PressureIs value negative or Pressure tap location Exhaust tube At bottom of heaterExhaust Tube Pressure tap location Check harness Connection from igniter To ignition module Hot surface Igniter Testing ProcedureCheck during igniter warm up period Hot surface Igniter Replacement Procedure ScrewsCheck continuity from tip of flame sensor N Flame Sensor Testing ProcedureGasket SensorFlame Sensor Replacement Procedure Spark Rod Gap Inspection and Adjustment Spark Rod Replacement Procedure Ignition Module Replacement Procedure Ignition Module Located on control panelIdentify wires for Step Disconnect harness P1 & P2 From ignition module Transformer Replacement ProcedureStep Pressure tap Call for technical support Does Blower Energize?Or more? Step Remove Mounting screws Intake Pressure Switch Replacement ProcedureStep Disconnect red wires System OK Reset button Button on highVent Safety Switch Replacement Procedure Disassembly Procedure for Access to Anodes & Flue Baffles Anode inspection and replacement Flue baffle inspection and replacement Powered Anode Replacement EF100T399 models only Collector Cover Installation Procedure Vent tables Gas Line Gas Pressure Venturi Spark GapModels prior to CF serial number Latch Assy Electronic Control Module For models with CF serial or later Combustion Surround Assy. specify Electronic Control Module For models with Direct Spark Ignition Honeywell Control Display 10C 11C 12C 13C BTU/H Page Page Parts@bradfordwhite.com Techserv@bradfordwhite.com

EFR160T120*(EN, EF100T250(E)*(N, EF100T399(E)*(N, EF100T300(E)*(N, EF60T125(E)*(N specifications

Bradford-White Corporation is a leading manufacturer of water heating solutions, known for its high-quality and durable products. Among its extensive product lineup, the EF60T150(E)*(N), EF100T150(E)*(N), EF60T199(E)*(N,X)(A)(2), and EF100T199(E)*(N) models stand out for their impressive features and technologies that cater to both residential and commercial water heating needs.

The EF60T150(E)*(N) model is designed for medium to large households, providing a reliable hot water supply. It features a 60-gallon tank with a first-hour delivery rate that ensures ample hot water, making it ideal for simultaneous usage in multiple applications. This water heater operates on natural gas, boasting high energy efficiency ratings due to its advanced burner technology. The environmentally friendly design reduces greenhouse gas emissions while delivering consistent performance.

Similarly, the EF100T150(E)*(N) model provides an even larger capacity of 100 gallons, addressing the hot water demands of larger families or commercial establishments. It employs Bradford-White's Hydrojet Total Performance System, which minimizes sediment buildup and optimizes hot water output. This model also features a patented Vitraglas lining that protects the tank from corrosion, extending its lifespan and enhancing reliability.

On the other hand, the EF60T199(E)*(N,X)(A)(2) and EF100T199(E)*(N) models offer advanced technology with their unique "N" designation, indicating that they are equipped to handle more extensive heating requirements efficiently. The EF60T199 model, with its 60-gallon capacity, and the EF100T199, with 100 gallons, incorporate enhanced insulation to reduce heat loss and improve energy efficiency. Both models are designed for easy installation and maintenance, making them user-friendly for both homeowners and technicians.

Additionally, these water heaters feature advanced electronic ignition and controls that allow for precise temperature regulation and easy monitoring. The intuitive user interface simplifies operation, while built-in safety features ensure reliable and secure hot water delivery.

Overall, Bradford-White's EF series of water heaters, including the EF60T150(E)*(N), EF100T150(E)*(N), EF60T199(E)*(N,X)(A)(2), and EF100T199(E)*(N), exemplify the company's commitment to quality and innovation. With their robust performance, energy efficiency, and advanced technologies, these models offer dependable hot water solutions tailored to meet the diverse needs of today's consumers. Whether for residential or commercial use, Bradford-White continues to set the standard for excellence in water heating technology.
Top Page Image Contents