Bradford-White Corp EF100T150(E)*(N, EF100T199(E)*(N, EF100T250(E)*(N, EF100T300(E)*(N, EF100T399(E)*(N, EF60T125(E)*(N, EF60T150(E)*(N, EF60T199(E)*(N, EFR160T120*(EN, X)(A)(2) IMPORTANT NOTE: This procedure assumes a cool tank, 120 volt potential exposure. Use caution making voltage checks to avoid personal injury.

Refer to ignition module

illustration, Is there 24VAC

between P3(7) and P3(8)?

Y

OK, thermostat is

calling for heat.

Turn off power to heater.

Disconnect YELLOW and RED wires from the

thermostat board at location N.O. and COM shown in

photo at right. Use a jumper to connect these two

wires together as shown in photo at right.

Restore power to heater.

Did heater cycle on?

N

Check thermostat sensor

for proper resistance

(OHMS) across blue wires.

(See Appendix A, sensor

resistance)

Are readings correct?

(see photo at right)

Check temperature dial for

proper resistance (OHMS)

(See Appendix B,

temperature dial resistance)

Are readings correct?

(see photo at right)

Y

Y

Replace

thermostat sensor.

(see Thermostat Sensor

Replacement Procedure)

Replace temperature dial

(potentiometer).

(see Thermostat Potentiometer

Replacement Procedure)

N

N

N

Replace thermostat

circuit board.

(see Thermostat Board

Replacement Procedure)

Y

Check sensor harness

continuity.

Is there continuity?

Check temperature dial

harness continuity.

Is there continuity?

Replace harness.

Y

N

Replace harness.

N

Y

See page 39

IGNITION MODULE

IMPORTANT NOTE: This procedure assumes a cool tank

Rotate temperature

dial to highest setting.

Thermostat

not calling

WARNING

120 volt potential exposure. Usecaution making voltage checksto avoid personal injury.

For models with Hot Surface Ignition

37

Thermostat

Sensor

Temperature Dial

Yellow & Red

wires shown

jumpered

Yellow Wire

(COM)

Red Wire

(N.O.)

37

Contents

Main SERVICE MANUAL Ultra High Efficiency Water Heaters The Bradford White Page Page Page Page Page NOTICE Page Page Ignition Module Specifications IGNITION MODULE Page For models starting with CF serial numbers and later. Ignition Module Specifications IGNITION MODULE For models starting with CF serial numbers and later. System w/ Direct Spark Ignition (Excluding EF100T399 model series) System w/ Direct Spark Ignition CONNECTION/WIRING DIAGRAM CONNECTION DIAGRAM WIRING DIAGRAM 120 volt potential exposure. Use caution making voltage checks to avoid personal injury. Power Switch Terminal Block Replace ignition module. (see Ignition Module Replacement) LED status & probable cause For models with Direct Spark Ignition Use caution not to damage connectors when making voltage measurements or jumping terminals 120 volt potential exposure. Use caution making voltage checks to avoid personal injury. CONTROL BOARD For models with Direct Spark Ignition Use caution not to damage connectors when making voltage measurements or jumping terminals 120 volt potential exposure. Use caution making voltage checks to avoid personal injury. CONTROL BOARD % & 1. Max Setpoint (Display/Change) 2. Tank Sensor Temperature Displayed Water TemperatureAverage. Max Setpoint value in Water Heater Display & 3. Flame Current of Burner Flame Sensor (Displays only in the Heating Cycle) 4. Setpoint (Display/Change) 5. F/C (Display/Change) 6. Differential (Display only - shows the differential of the thermostat) & & % % % Step 4: Press Set button to confirm new Max Setpoint valueand stop setting mode. "Max Setpoint" stops flashing & Page % Page Step 3a: Press Temperature Up buttonto change temperature format to C Step 3b: Press Temperature Down button to change temperature format to F Step 4: Press Set button to confirm F or C format. F/C will stop flashing Page % % &% Exiting Service Mode Error Code Definitions ERROR CODE DEFINITIONS HONEYWELL INTEGRATED CONTROL ERROR CODE DISPLAY FOR EF MODEL SERIES % & % IMPORTANT NOTE: This procedure assumes a cool tank 120 volt potential exposure. Use caution making voltage checks to avoid personal injury. CAUTION Use caution not to damage connectors when making voltage measurements or jumping terminals Condition: Water Heater Not Operating Display shows error code 32 ( Sensor Reading Faulty) Serial Numbers including and AFTER GB13006174 and ALL EFR models (Excluding EF100T399 model series). Page IMPORTANT NOTE: This procedure assumes a cool tank 120 volt potential exposure. Use caution making voltage checks to avoid personal injury. For models with Hot Surface Ignition APPENDIX - A Sensor Resistance at Various Temperatures APPENDIX - B Temperature Dial Resistance Draw Water From The T&P Valve. Compare Temperature With Temperature Ohms Chart Below. 120 volt potential exposure. Use caution making voltage checks to avoid personal injury. Thermostat Board Replacement Procedure Thermostat Potentiometer Replacement Procedure Thermostat Sensor (Thermister) Replacement Procedure Direct Spark Ignition Models Hot Surface Ignition Models Volt meter set to OHM setting Meter probe Hot surface igniter CHECK IGNITER RESISTANCE 120 volt potential exposure. Use caution making voltage checksto avoid personalinjury. For models with Hot Surface Ignition System For models with Hot Surface Ignition System 120 volt potential exposure. Use caution making voltage checksto avoid personalinjury. Spark Rod Meter probe Removing screw from inlet gas pressure tap will immediately allow gas to flow from pressure tap. Serial Numbers including and AFTER GB13006174 and ALL EFR models Flame Sense Rod CHECK FLAME SENSE ROD MICROAMPS Multimeter set to microamp (A) setting Flame Sense Terminal Serial Numbers including and AFTER GB13006174 and ALL EFR models Combustion System Removal Procedure Combustion System Replacement Procedure Burner Tube Removal Procedure Burner Tube Inspection Burner Tube Replacement Procedure Gas Valve Replacement Procedure HOT SURFACE IGNITION MODELS DIRECT SPARK IGNITION MODELS Blower Replacement Procedure Safety Circuit Trace Check Collector Pressure Exhaust Pressure Switch Replacement Procedure Safety Circuit Trace Blocked Vent Pressure Switch Testing and Replacement for serial number CF and later WARNING Check Exhaust Tube Pressure Blocked Vent Pressure Switch Testing and Replacement for serial number CF and later Exhaust Pressure Switch Replacement Procedure Blocked vent Switch Testing and Replacement For serial number CF or later Hot surface Igniter Testing Procedure Hot surface Igniter Replacement Procedure Note: Do not handle igniter element or allow foreign material to come in contact with element. Flame Sensor Testing Procedure terminal Meter probe Flame sensor terminal Volt meter set to Micro amps setting (A) Flame Sensor Replacement Procedure Spark Rod Gap Inspection and Adjustment Use caution while performing these steps to prevent stressing or cracking the ceramic insulator. Spark Rod Replacement Procedure Ignition Module Replacement Procedure Control Board Replacement Transformer Replacement Procedure Ignition module Thermostat board Used on EF water heaters prior to CF serial number. Notice: The intake pressure switch is not used on serial number CF and later. Intake Pressure Switch Replacement Procedure Used on EF water heaters prior to CF serial number. WARNING Vent Safety Switch Replacement Procedure Disassembly Procedure for Access to Anodes & Flue Baffles Note: EF100T399 models have only 1 anode rod under the 2nd pass collector cover. Anode inspection and replacement Flue baffle inspection and replacement Powered Anode Replacement EF100T399 models only Powered Anode Replacement for EF100T399 only Collector Cover Installation Procedure Page Page Page Page Page Customer must specify complete model number and serial number when ordering service parts.