Résumé du contenu de la page N° 1
®
Ultra High Efficiency Water Heaters
C
SERVICE
MANUAL
Troubleshooting Guide
and Instructions for Service
(To be performed ONLY by
qualified service providers)
Models Covered
by This Manual:
For The Bradford White
®
eF Series Ultra High Effeciency
Models:
EFR160T120*(EN,SX)
EF60T125(E)*(N,X)(A)(2)
EF60T150(E)*(N,X)(A)(2)
EF60T199(E)*(N,X)(A)(2)
EF100T150(E)*(N,X)(A)(2)
EF100T199(E)*(N,X)(A)(2)
EF100T250(E)*(N,X)(A)(2)
EF100T300(E)*(N,X)(A)(2)
EF100T399(E)*(N,X)(A)(2)
(*) Denotes Warranty Years
M
Résumé du contenu de la page N° 2
The Bradford White Page eF Service Procedure Introduction 3 - - - How to use this manual 4 - - - Tool required for service 4 - - - Features 5 - - - Specifications 6 - - - Sequence of Operation 10 - - - Troubleshooting 16 - - - Thermostat Circuit, Testing & Replacement 35 I Combustion System Testing and Replacement 43 II Burner Tube Inspection & Replacement 49 III Gas Valve Replacement 51 IV Blower Testing and Replacement 52 V Exhaust Pressure Switch Testing and Replacement 54 VI Hot Surface Igni
Résumé du contenu de la page N° 3
® The Bradford White eF Series Ultra High Efficiency Water Heater is designed to deliver a remarkable thermal efficiency rating in a quiet running unit with venting options that allow for installation flexibility. Several technologically advanced design features are incorporated in the design that will require additional knowledge on the part of the qualified service provider. The information in this manual will instruct service and maintenance professionals on the function, proper ® diagnosis a
Résumé du contenu de la page N° 4
It is intended for this manual to be used by qualified service personal for the primary purpose ® of troubleshooting analysis and repair of the Bradford White eF Series Ultra High Efficiency Water Heater. Understanding the sequence of operation section of this manual will contribute greatly to troubleshooting this product. An “Installation Check List” is shown towards the end of this manual. Compare the installation against the installation check list to confirm all requirements are met. An “eF
Résumé du contenu de la page N° 5
Serial Numbers including and AFTER GB13006174 and ALL EFR models Attractive digital water heater display on control panel for setting and displaying the temperature setpoint. Pressing temperature UP and DOWN buttons changes the temperature setpoint. Same water heater display used on all models. Temperature format may be displayed in °F or °C. Single control board with plug in wiring controls temperature, ignition, and blower operation. Reduced number of parts for servicing and wiring. Plug in
Résumé du contenu de la page N° 6
Recovery GPH DIMENSIONS (INCHES) at Degree Rise A B C D E F G H st 1 Hr Del Input Stg Therm Ht Dia Flr Flr to Flr to Flr To Flr. To Flr to Front Space Gas T&P Shpg Gal Model No Rate 40°F 100°F 140°F Cap Eff to Inlet T&P Outlet Air Gas Wtr Heating Conn Valve Wt @ U.S. % Vent Wtr Valve Wtr Intake Conn Conn Conn Dia Open (lbs) BTU/h 100°F Gal Outlet Conn Conn Conn Dia Dia (NPT) (NPT) Rise EFR-1-60T-120 120,000 180 345 138 99 60 95.0 57 28 ¼ 5 13 40 42 ¼ 52 ½ 53 ½ 1 1 ¾ ¾ 570 EF60T125 125,000 187 36
Résumé du contenu de la page N° 7
Power supply Dedicated 120 VAC, 60 Hz, 15A, GFI Minimum 1" NPT for EF100T399, all others ¾" NPT Gas Supply (schedule 40 black iron pipe recommended) Approved Gas Type Natural or Propane. Unit must match gas type supplied. Gas Pressure (Nat & L.P.) 14.0" W.C. maximum static, 4.5" W.C. minimum running (recommend 7.0" W.C. min running) Venting System Power vent, balanced direct vent or unbalanced direct vent. See vent tables on page 7 Approved Vent Materials PVC or CPVC Minimum Clearance 18" from t
Résumé du contenu de la page N° 8
Serial Numbers including and AFTER GB13006174 and ALL EFR models Power supply Dedicated 120 VAC, 60 Hz, 15A Minimum ¾" NPT Gas Supply (schedule 40 black iron pipe recommended) Approved Gas Type Natural or Propane. Unit must match gas type supplied. Gas Pressure (Nat & L.P.) 14.0" W.C. maximum static, 4.5" W.C. minimum running (recommend 7.0" W.C. min running) Venting System Power vent, balanced direct vent or unbalanced direct vent. See vent tables on page 7 Approved Vent Materials PVC or CPVC M
Résumé du contenu de la page N° 9
Balanced Direct Vent Systems Power Vented Systems PVC, CPVC PVC, CPVC Total length of intake piping and exhaust piping Total length of exhaust piping must not exceed added together must not exceed “Maximum “Maximum Vent Length” Combined Length” Shown below Shown below Maximum Combined Length (feet) Maximum Vent Length (feet) Model Number 2" 3" 4" Model Number 2" 3" 4" EFR-1-60T120 60' 120' 170' EFR-1-60T120 60' 120' 170' EF60T125, EF100T150 30' 120' 170' EF60T125, EF100T150 30' 120' 170' EF60T15
Résumé du contenu de la page N° 10
For models prior to CF serial numbers For models prior to CF serial numbers 1 Thermostat calls for heat. -Prior to energizing blower, ignition module checks safety circuits for normal switch positions: a) Vent temp switch normally closed. b) Intake pressure switch normally closed. c) Exhaust pressure switch normally open. If the vent temp switch is open, the control waits indefinitely for temp switch to close (green light stays on). If the exhaust pressure switch contacts are closed (not in
Résumé du contenu de la page N° 11
For models prior to CF serial numbers For models prior to CF serial numbers Lockout Conditions If normally closed pressure switch contacts open during burner operation, gas valve closes, burner shuts off. Blower restarts after 30 seconds and runs 5 minutes to wait for pressure switch to close. If not, locks out. The system will go into lock out mode for the following reasons: - Pressure switches stuck open or closed. a) Check for exhaust or intake obstructions. b) Check for compliance with ve
Résumé du contenu de la page N° 12
For models starting with CF serial numbers and later. For models starting with CF serial numbers and later. 1 Thermostat calls for heat. Prior to energizing blower, ignition module checks to make sure the vent temperature switch is in the normally closed position. If the vent temperature switch is open, the control waits indefinitely for the temperature switch to close. 2 Blower energizes, pressure switch contacts are normally closed. If the pressure switch contacts are open, blower operates
Résumé du contenu de la page N° 13
For models starting with CF serial numbers and later. For models starting with CF serial numbers and later. Lockout Conditions Lockout conditions: The system will go into lock out mode for the following reasons: Blocked vent pressure switch contacts open: Check for obstruction in exhaust pipe and vent terminal. Check for blocked condensate trap or drain line. In cold climates, make sure drain is not frozen. No ignition after 3 attempts: a) Check inlet and outlet gas pressures (pressure taps loc
Résumé du contenu de la page N° 14
For models with Honeywell Integrated Control System w/ Direct Spark Ignition Serial Numbers including and AFTER GB13006174 and ALL EFR models (Excluding EF100T399 model series) 1 Thermostat calls for heat. 2 Combustion blower starts. 3 Blower pre-purge period of 30 seconds. 4 Trial for Ignition. (5 seconds, 3 trials). Flame establishing period (3 seconds), gas valve opens, sparks from spark rod to burner surface to ignite the gas. Burner on, flame proving period (2 seconds). Requires a minimum
Résumé du contenu de la page N° 15
For models with Honeywell Integrated Control System w/ Direct Spark Ignition Serial Numbers including and AFTER GB13006174 and ALL EFR models Lockout Conditions The system will go into lock out mode for the following reasons: 1. ERROR CODE 62 or 63 Control board will go into “Soft Lockout” if the main burner cannot be lit or fails to prove flame after 3 ignition trials. The water heater display indicates a lockout condition by showing an error code number (62 or 63) with “Service Needed” in the
Résumé du contenu de la page N° 16
System Observation For models with Hot Surface Ignition WARNING Is front panel power Position front panel N 120 volt potential exposure. Use caution switch light on, power switch to indicating power? “ON” position. making voltage checks to avoid personal injury. Y Power Switch Is there 120VAC Light burned out, Y across switch? replace switch. (see photo at right) N Terminal Block Is there 120VAC Y Repair/replace wire across terminal block? harness to switch. (see photo at right) N Determine powe
Résumé du contenu de la page N° 17
LED status & probable cause For models with Hot Surface Ignition Determine failure mode by observing flashing LED status on ignition module. LED status and probable cause shown below. * Denotes conditions that may require the water heater to be isolated from the vent system to determine root cause. LED STATUS Only power light is on and water heater will not function. Probable Cause* Exhaust pressure Probable Cause Probable Cause switch. (see “Exhaust Thermostat circuit. Vent safety switch. Pres
Résumé du contenu de la page N° 18
System Observation For models with Direct Spark Ignition Water Heater Fault: Water heater does not operate Display Error Code: Water heater display does not operate - blank display WARNING Check main power supply to water heater - fuse, circuit breaker, plug 120 volt potential exposure. Use caution receptacle, line cord or wiring to water making voltage checks to avoid personal injury. heater. CAUTION Use caution not to damage connectors when Check to make sure switch on front of making voltage
Résumé du contenu de la page N° 19
System Observation For models with Direct Spark Ignition WARNING 120 volt potential exposure. Use caution making voltage checks to avoid personal injury. From previous page CAUTION Use caution not to damage connectors when making voltage measurements or jumping terminals Replace control board if display shows “heating” and no voltage is Error code #29 on display. Refer to Control Board N N present to the blower harness. illustration. Measure voltage between terminals P7(3) & Does combustion blow
Résumé du contenu de la page N° 20
Accessing Service Mode on Control Display For models with Honeywell Integrated Control The display has a “service mode” for changing the maximum setpoint and accessing information in aiding servicing of the water heater. This procedure is for service and installation personnel only. To enter the Service Mode, follow the steps illustrated below: Step 1: Press “Select” and “Temperature Up” buttons together and hold for 3 seconds until “Max Setpoint” is shown in the display. "Max Setpoint" next
