*(NA,XA)(2)
EF100T399E*(NA,XA)(2)
(*) Denotes Warranty Years
R Table of Contents
Page
eF Service Procedure
Introduction
3
- - -
How to use this manual
4
- - -
Tool required for service
4
- - -
Specifications
5
- - -
Sequence of Operation
8
- - -
Troubleshooting
12
- - -
Thermostat Circuit, Testing & Replacement
14
I
Combustion System Testing and Replacement
20
II
Burner Tube Inspection & Replacement
24
III
Gas Valve Replacement
26
IV
Blower Testing and Replacement
27
V
Exhaust Pressure Switch Testing and Replacement
29
VI
Hot Surface Igniter Testing and Replacement
35
VII
Flame Sensor Testing and Replacement
37
VIII
Ignition Module Replacement
39
IX
Transformer Replacement
40
X
Intake Pressure Testing and Replacement
41
XI
Vent Safety Switch Testing and Replacement
43
XII
Anode & Flue Baffle Inspection and Replacement
45
XIII
Installation Check List
50
- - -
Heater Service Report
51
- - -
Parts List
52
- - -
Glossary of Terms
58
- - -
The Bradford White
Ultra High Efficiency Water Heaters
Page 2 Introduction
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 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 on LEDs 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.
Page 3
R
R
R
R
R Tools Required for Service
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 on page 50. Compare the installation against the installation
check list to confirm all requirements are met.
An eF Service Report is shown on page 51. 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 listed on page 11 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.
Page 4
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.
How to Use This Manual
R Specifications
Page 5
EF60T125
EF60T150
EF60T199
EF100T150
EF100T199
EF100T250
EF100T300
EF100T399
125,000
150,000
199,999
150,000
199,999
250,000
300,000
399,999
187
211
265
250
309
364
405
521
363.6
422.7
557.6
450.5
597
734.8
836.4
1,127
145.5
169.1
223
180.2
238.8
293.9
334.5
451
103.9
120.8
158
129
171
210
239
322
60
60
60
100
100
100
100
100
96.0
93.0
92.0
99.1
98.5
97.0
92.0
93.0
57
57
57
77 5/8
77 5/8
77 5/8
77 5/8
77 5/8
28 3/8
28 3/8
28 3/8
28 3/8
28 3/8
28 3/8
28 3/8
28 3/8
5
5
5
5
5
5
5
5
13
13
13
13
13
13
13
13
40
40
40
60
60
60
60
60
42 ¼
42 ¼
42 ¼
62 ¼
62 ¼
62 ¼
62 ¼
62
¼
52 ½
52 ½
52 ½
73 1/8
73 1/8
73 1/8
73 1/8
73 1/8
53 ½
53 ½
53 ½
74 ¾
74 ¾
74 ¾
74 ¾
73 ¼
1 ½
1 ½
1 ½
1 ½
1 ½
1 ½
1 ½
1 ½
1
1
1
1
1
1
1
1
¾
¾
¾
¾
¾
¾
¾
1
¾
¾
¾
¾
¾
¾
¾
1
570
570
570
900
900
900
900
950
Shpg
Wt
(lbs)
T&P
Valve
Open
Gas
Conn
Dia
Space
Heating
Conn
Dia
Front
Wtr
Conn
Dia
H
Flr to
Gas
Conn
G
Flr. To
Air
Intake
F
Flr To
Outlet
Wtr
Conn
E
Flr to
T&P
Valve
Conn
D
Flr to
Inlet
Wtr
Conn
C
Flr
to
Vent
Outlet
B
Dia
A
Ht
Therm
Eff
%
Stg
Cap
U.S.
Gal
140°F
100°F
40°F
1
st
Hr
Del
Gal
at
100°F
Rise
Input
Rate
BTU/h
Model No
Recovery GPH
at Degree Rise
DIMENSIONS (INCHES) Specifications
Page 6
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 page 11.
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, CPVC or ABS
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. Specifications
Vent Tables
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 e