Bradford White EF100T150(E)*(N Bedienungsanleitung

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Manual 238-45817-00F

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 WarrantyYears

Ultra High Efficiency Water Heaters

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 Igniter Testing and Replacement 60 VII

Flame Sensor Testing and Replacement 62 VIII

Spark Rod Gap Adjustment and Replacement 64 IX

Ignition Module/Control Board Replacement 66 X

Transformer Replacement 68 XI

Intake Pressure Testing and Replacement 69 XII

Vent Safety Switch Testing and Replacement 71 XIII

Anode & Flue Baffle Inspection and Replacement 73 XIV

Installation Check List 78 - - -

Heater Service Report 79 - - -

Parts List 80 - - -

Glossary of Terms 89 - - -

The Bradford White eF Series®Ultra High Efficiency Water Heater uses a low

Nox premix power burner located at the top of the water heater to direct a turbulent

flame down into a submerged combustion chamber. This turbulence causes a

thorough mixing of gas and air for optimum combustion. The combustion gases

then travel through a three pass flue system keeping the gases moving at a high

velocity. The combination of high turbulence and velocity results in an optimum

transfer of heat from the flue gases into the water.

Burner operation is controlled using an electronic ignition module. The module

monitors the status of the electronic thermostat, vent temperature limit switch, vent

system pressure switches and a flame sensor to control output voltage to blower

motor, hot surface igniter/spark rod and gas valve. The module contains

programming which determines the sequence of operation and timings for purge

periods, trial for ignition, flame sensing and lockout. The module will also provide

diagnostic information to help in determining the cause of system lockouts.

The contents in this manual are detailed informational tools to assist in the proper

diagnosis of the eF Series®Ultra High Efficiency Water Heater operational faults.

Please read this service manual completely and provide as much information

regarding the eF Series®Ultra High Efficiency Water Heater operation and

installation specific concerns.

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 and repair of The Bradford White eF Series®Ultra High Efficiency Water

Heater.

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 Service Report” is shown towards the end of this manual. Completing this form will

assist in the troubleshooting efforts. Should you need to call for technical support, Please

provide the information shown on this form to the support technician to insure accurate

troubleshooting.

Troubleshooting begins with “System Observation” to determine failure mode as indicated by

the LED status of the ignition module. Troubleshooting continues with “Failure Modes and

Probable cause” directing the service provider to a series of test procedures to determine

root cause of failure. Component replacement procedures directly follow the test procedures

for a given component.

In some difficult to diagnose conditions, it may be necessary to isolate the heater from the

vent system to determine root cause.

Contact Technical support immediately if diagnosis is not determined using the methods

described in this service manual.

Manometer: Two types available, a liquid “U” tube type or a digital (magna-helic)

type. This device is used to measure gas and/or air pressures and

vacuum.

Multi-Meter: A digital type is strongly recommended. This device is used to measure

electrical values. The meter you select must have the capability to

measure volts AC, volts DC, Amps, micro-amps and ohms.

Thermometer: Used to measure water temperature. An accurate thermometer is

recommended.

Water Pressure Gage: Used to measure water supply pressure. Also used to determine tank

pressure by adapting to the drain valve of the heater.

Jumper Leads: A length of wire (12" min.) with alligator clip at both ends.

Various Hand Tools: Pipe wrench, channel locks, open end wrench set, 12" crescent wrench,

Allen wrench set, torx bit set, screw drivers (common & phillips), long

reach (12") magnetic tip phillips head screw driver #2 tip, ¼" nut driver,

pliers (common & needle nose), socket set including a 1-1/16 deep well

socket, wire cutters, wire strippers, wire crimpers, torpedo level, small

shop vac, step ladder, and flashlight.

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 wiring reduces chance of miswirng.

Burner ignition with direct spark ignition - A high voltage spark jumps from the spark rod to

the burner surface to ignite the gas. Eliminates burned out hot surface igniter

replacements.

Water heater display will show diagnostic codes in the event the water heater needs

servicing. Aids in diagnosing and servicing the water heater.

Water heater display can show previous error code history to further aid in servicing the

water heater.

Serial Numbers including and AFTER GB13006174 and ALL EFR models

NOTICE:

THE EF100T399 MODEL SERIES DO NOT USE THE HONEYWELL

INTEGRATED CONTROL SYSTEM. THESE MODELS USE THE UT

ELECTRONICS CONTROL MODULE WITH HOT SURFACE IGNITION.

EFR-1-60T-120

EF60T125

EF60T150

EF60T199

EF100T150

EF100T199

EF100T250

EF100T300

EF100T399

120,000

125,000

150,000

199,999

150,000

199,999

250,000

300,000

399,999

180

187

211

265

250

309

364

405

521

345

363.6

422.7

557.6

450.5

597

734.8

836.4

1,127

138

145.5

169.1

223

180.2

238.8

293.9

334.5

451

103.9

120.8

158

129

171

210

239

322

100

95.0

96.0

93.0

92.0

99.1

98.5

97.0

92.0

93.0

77 5/8

28 ¼

42 ¼

62 ¼

52 ½

73 1/8

53 ½

74 ¾

73 ¼

1 ½

570

900

950

Shpg

(lbs)

T&P

Valve

Open

(NPT)

Gas

Conn

Dia

(NPT)

Space

Heating

Conn

Dia

Front

Wtr

Conn

Dia

Flr to

Gas

Conn

Flr. To

Air

Intake

Flr To

Outlet

Wtr

Conn

Flr to

T&P

Valve

Conn

Flr to

Inlet

Wtr

Conn

Flr

Vent

Outlet

Dia

Therm

Eff

Stg

Cap

U.S.

Gal

140°F100°F40°F

1st Hr

Del

Gal

100°F

Rise

Input

Rate

BTU/h

Model No

Recovery GPH

at Degree Rise DIMENSIONS (INCHES)

Thermostat Sensor 11,900 Ohms @ 70°F, ECO opens @ 201°F Max., ECO close @ 100°F Min.

Thermostat Board Max temp 180°F, Min temp 91°F, 24VAC, 60Hz max.

Hot Surface Igniter 120VAC, 30-120 ohms @ room temperature.

Flame Sensor Output Minimum 1 micro amp, Typical range 4 to 7 micro amps.

Temperature Dial Min. set point 5400-6600 ohms, Max set point 0-50 ohms.

Ignition Module See “Sequence of Operation, for models starting with CF serial and later”

Gas Valve Negative regulation, 24 VAC, ½" PSI max., 4.5" W.C. Minimum running inlet.

Transformer 120VAC primary, 24VAC secondary, 40VA.

Vent Safety Switch Normally closed, opens @ 350°F, manual reset.

Intake Pressure Switch

“CF” serial number or

later

Not required.

Blower 120VAC, 60Hz, .6-1 amps, 6400 RPM.

Exhaust pressure switch

serial numbers prior to

“CF”

24VAC, normally open, closes on pressure increase as follows

Note 1:

+2.58" W.C. EF(60,100)T199

+1.50" W.C. EF100T150 (see note 2)

+1.22" W.C. EF60T150, EF100T250

+2.08" W.C. EF60T125

+0.55" W.C. EF100T300 (see note 3)

Note 2: +5.6" W.C. on serials prior to AH5039107

Note 3: +0.8" W.C. on serials prior to AK5288269

Power supply Dedicated 120 VAC, 60 Hz, 15A, GFI

Approved Gas Type Natural or Propane. Unit must match gas type supplied.

Venting System Power vent, balanced direct vent or unbalanced direct vent. See vent tables on page 7

Approved Vent Materials PVC or CPVC

Gas Supply Minimum 1" NPT for EF100T399, all others ¾" NPT

(schedule 40 black iron pipe recommended)

Minimum Clearance

for Servicing 18" from top, 24" from front, 4" sides and rear.

Maximum Water Supply

Pressure 150 PSI

Gas Pressure (Nat & L.P.)14.0" W.C. maximum static, 4.5" W.C. minimum running (recommend 7.0" W.C. min running)

Combustion Levels CO2: 10-11%, CO: less then 0.04 percent (400 PPM) air free

Intake Pressure Switch

serial numbers prior to

“CF”

24VAC, normally closed, opens on vacuum increase @ -1.20 W.C.

Blocked Vent Pressure

Switch “CF” serial

number or later

24VAC, normally closed, opens when pressure increases to +2.70 W.C.

Power supply Dedicated 120 VAC, 60 Hz, 15A

Thermostat Sensor 11,900 Ohms @ 70°F, ECO opens @ 207°F Max., ECO close @ 120°F Min. Redundant

sensor for ECO. Sensor inside well for easy replacement of sensor.

Spark Rod Igniter 0.22" nominal gap to the burner surface.

Flame Sensor Output Minimum 1 micro amp, Typical range 5 to 30 micro amps.

Control Display

Digital display, 24 volts. Temperature Range: 70-180 deg. F. Used to set tank temperature

(deg. F or deg. C), show operating status, Display error codes, error code history, limit

maximum setpoint temperature.

Control Board Operates from 24 volt from transformer. Controls tank temperature, ignition functions,

combustion blower. See ignition timings in sequence of operation for Integrated Control.

Gas Valve Negative regulation, 24 VAC, ½" PSI max., 4.5" W.C. Minimum running inlet.

Transformer 120VAC primary, 24VAC secondary, 40VA.

Vent Safety Switch Normally closed, opens @ 350°F, manual reset.

Blower 120VAC, 60Hz, .6-1 amps, 6400 RPM.

Approved Gas Type Natural or Propane. Unit must match gas type supplied.

Venting System Power vent, balanced direct vent or unbalanced direct vent. See vent tables on page 7

Approved Vent Materials PVC or CPVC

Gas Supply Minimum ¾" NPT

(schedule 40 black iron pipe recommended)

Minimum Clearance

for Servicing 18" from top, 24" from front, 4" sides and rear.

Maximum Water Supply

Pressure 150 PSI

Gas Pressure (Nat & L.P.)14.0" W.C. maximum static, 4.5" W.C. minimum running (recommend 7.0" W.C. min running)

Combustion Levels CO2: 10-11%, CO: less then 0.04 percent (400 PPM) air free

Blocked Vent Pressure

Switch 24VAC, normally closed, opens when pressure increases to +2.70 W.C.

Serial Numbers including and AFTER GB13006174 and ALL EFR models

NOTICE:

THE EF100T399 MODEL SERIES DO NOT USE THE HONEYWELL

INTEGRATED CONTROL SYSTEM. THESE MODELS USE THE UT

ELECTRONICS CONTROL MODULE WITH HOT SURFACE IGNITION.

Notes:

1) Multiply the total number of 90° elbows (intake and exhaust) by 5 feet. Do not include the

termination fittings or 3" condensate elbow.

2) Multiply the total number of 45° elbows (intake and exhaust) by 2 ½ feet.

3) Add this to the total length of straight pipe - intake and exhaust.

4) The sum total of all elbows and straight pipe - intake and exhaust must not exceed maximum

lengths from tables above.

Example: EF100T199

A3" Balanced Direct vent system has 30 feet of straight exhaust pipe and 30 feet of straight

intake pipe. It has 3- 90° elbows in the exhaust and 3- 90° elbows in the intake. It has 1- 45°

elbow in the exhaust and 1- 45° elbow in the intake.

Therefore:

6- 90° elbows x 5 feet = 30 feet.

2- 45° elbows x 2½ feet = 5 feet.

60 feet of straight pipe + 30 feet + 5 feet = 95 feet.

System is within “Maximum Combined Length” from table above.

Unbalanced Direct Vent Systems

Air intake CAN NOT exceed exhaust

by more than 30 feet

Power Vented Systems

PVC, CPVC

Total length of exhaust piping must not exceed

“Maximum Vent Length”

Shown below

Maximum Vent Length (feet)

Model Number 3"

EF60T125, EF100T150 120'

EF60T150, EF100T199

EF60T199

EF100T300

100'

80'

60'

170'

150'

130'

110'

EF100T399 50' 100'

EFR-1-60T120 60' 120'

170'

30'

N/A

Balanced Direct Vent Systems

PVC, CPVC

Total length of intake piping and exhaust piping

added together must not exceed “Maximum

Combined Length”

Shown below

Maximum Combined Length (feet)

Model Number 3"

EF60T125, EF100T150 120'

EF60T150, EF100T199

EF100T250

EF100T300

100'

80'

60'

170'

150'

130'

110'

EF100T399 50' 100'

EFR-1-60T120 60' 120'

170'

30'

N/A

EF60T199 80' 130'30'

EF100T250 80' 130'N/A

WARNING! The EF100T250 and EF100T300 models are not

approved for 2 inch diameter vent pipe. Venting with 2 inch

pipe on these models may result in damage to the water heater

or cause an unsafe condition. DO NOT use 2 inch Vent or Air

Intake Pipe on EF100T250/300 models.

1Thermostat 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 normal position), the ignition module will wait 45 seconds for

pressure switch contact to open before energizing blower. If after 45 seconds and pressure switch contacts do not open,

the ignition module locks out with the PURGE light flashing indicating pressure switch fault.

2Blower energizes.

3Pressure switch proves blower/vent system operation.

If the N.O. contacts of the exhaust pressure switch do not close within 5 minutes of the blower being on,

the control locks out with the PURGE light flashing indicating pressure switch fault.

4Blower pre-purge period (5 seconds) indicated by the PURGE LED on the module.

5Igniter warm up (18 seconds), indicated by the IGNITER LED on the module.

6Trial for ignition (4 seconds, three trials).

a) Flame establishing period (2.5 seconds) gas valve and igniter on, indicated by the IGNITER and VALVE LED

on the module.

b) Burner on, flame proving period (1.5 seconds, looking for minimum of 1 micro amps), indicated by the FLAME

& VALVE LED on the module.

7Steady state operation.

Ignition module monitors:

-Thermostat circuit.

-When thermostat opens, gas valve is shut down and post purge begins.

-Safety circuit.

-If vent temp switch opens, gas valve is shut down, system will post purge and wait for switch to close before

attempting re-ignition.

-If either pressure switch opens, Gas valve is shut down, Blower is shut down for 30 seconds after which blower

is re-energized and system attempts re-ignition starting at pressure switch proving mode.

-Flame sensor circuit.

-If flame is lost, gas valve is shut down, system will post purge and system attempts

re-ignition starting at pressure switch proving mode.

Thermostat satisfies.

Burner off.

Blower post purge (15 seconds).

For models prior to CF serial numbers

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