Bradford White eF Series User manual

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238-54145-00A 3/21
SERVICE
MANUAL
Troubleshooting Guide
and Instructions for Service
(To be performed ONLY by
qualified service providers)
Models Covered
by This Manual:
For Ultra High Efficiency Models:
60T125(E)*(N,X)(A)(2)
60T150(E)*(N,X)(A)(2)
60T199(E)*(N,X)(A)(2)
100T150(E)*(N,X)(A)(2)
100T199(E)*(N,X)(A)(2)
100T250(E)*(N,X)(A)(2)
100T300(E)*(N,X)(A)(2)
(*) Denotes Warranty Years
eF Series®Models
Ultra High Efficiency Water Heater
ICON System™ONLY

2
2
Ultra High Efficiency Water Heater
Table of Contents
Service Procedure
Serial Number Breakdown……………………………………… 3 - - -
Introduction……………………………………………………….. 4 - - -
How to Use this Manual…………………………………………. 4 - - -
Tools Required for Service……………………………………...... 5 - - -
Specifications……………………………………………………… 6 - - -
Sequence of Operation………………………………………….. 10 - - -
Building Management System (BMS)………………………….. 12 - - -
Troubleshooting………………………………………………….. 14 - - -
Thermostat Circuit Testing and Replacement……………….. 24 I
Combustion System Testing and Replacement………………. 29 II
Burner Tube Inspection and Replacement…………………… 33 III
Gas Valve Replacement………………………………………... 35 IV
Blower Testing and Replacement……………………………... 36 V
Exhaust Pressure Switch Testing and Replacement………... 38 VI
Flame Sensor Testing and Replacement…………………….. 42 VII
Spark Rod Gap Adjustment and Replacement………………. 43 VIII
Ignition Module/Control Board Replacement…………………. 45 IX
Transformer Replacement……………………………………… 46 X
Vent Safety Switch Testing and Replacement……………….. 47 XI
Anode/Flue Baffle Inspection and Replacement………….. 49 XII
Installation Checklist……………………………………………. 51 - - -
Water Heater Service Report………………….……………….. 52 - - -
Glossary of Terms………………………………………………. 53 - - -
Notes……………..………………………………………………. 53 - - -
Page

3
3
Determining the Age of Your Water Heater
The first two characters of the serial number represent the year and month of manufacture. The
remainder of the serial is a sequential production number, seven digits in length before December
2007 (DM), and eight digits in length after.
For example:
Production Year
A = 1984 or 2004
L = 1994 or 2014
B = 1985 or 2005
M = 1995 or 2015
C = 1986 or 2006
N = 1996 or 2016
D =1987 or 2007
P = 1997 or 2017
E = 1988 or 2008
S = 1998 or 2018
F = 1989 or 2009
T = 1999 or 2019
G = 1990 or 2010
W = 2000 or 2020
H = 1991 or 2011
X = 2001 or 2021
J = 1992 or 2012
Y =2002 or 2022
K = 1993 or 2013
Z = 2003 or 2023
For the year column, we do not use the letters: I, O, Q, R U, V
For the month column we do not use the letters: I & N –Z
Due to a computer error there were some OA serial water heaters manufactured. They were built in
January of 1997.
Production Month
A = January
G = July
B = February
H = August
C = March
J = September
D =April
K = October
E = May
L = November
F = June
M = December
NOTICE
This Service Manual is ONLY for ICON Control Systems (Serial Numbers XC and later). Please
make sure that your water heater falls within this range.

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4
The Ultra High Efficiency Water Heater is designed to deliver a high 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 Ultra High Efficiency
Water Heater.
The 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, 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
Ultra High Efficiency Water Heater operational faults. Please read this service manual completely
and provide as much information regarding the Ultra High Efficiency Water Heater operation and
installation specific concerns.
How to Use this Manual
It is intended for this manual to be used by qualified service personal for the primary purpose of
troubleshooting analysis and repair of the Ultra High Efficiency Water Heater. Understanding the
sequence of operation section of this manual will contribute greatly to troubleshooting this product.
An Installation Checklist is shown towards the end of this manual. Compare the installation against
the installation check list to confirm all requirements are met.
A 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, please 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.
Introduction

5
5
Tools Required for Service
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, screwdrivers (common &
Phillips), long reach (12") magnetic tip Phillips head screwdriver #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.

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6
Specifications
Recovery GPH at Degree Rise
Model No.
Input
Rate
BTU/hr
1st Hr. Del Gal
@ 100 °F
Rise
40°F 100°F 140°F Stg. Capacity
US Gal
Therm.
Efficiency %
60T125
125,000
187
363.6
145.5
103.9
60
96.0
60T150
150,000
211
422.7
169.1
120.8
60
93.0
60T199
199,999
265
557.6
223
158
60
92.0
100T150
150,000
250
450.5
180.2
129
100
97.0
100T199
199,999
309
597
238.8
171
100
97.0
100T250
250,000
364
734.8
293.9
210
100
96.0
100T300
300,000
405
836.4
334.5
239
100
92.0
DIMENSIONS (INCHES)
Model No. A
Height
B
Dia.
C
Floor to
Vent Outlet
D
Floor to Inlet
Water Conn.
E
Floor to T&P
Valve Conn
F
Floor to
Outlet Water
Conn
G
Floor to Air
Intake
H
Floor to Gas
Conn
Front Water
Conn Dia
Space
Heating
Conn Dia
Gas Conn
Dia (NPT)
T&P Valve
Open (NPT)
Shipping
Weight (lbs)
60T125
57
28 ¼
5
13
40
42 ¼
52 ½
53 ½
1 ½
1
¾
¾
570
60T150
57
28 ¼
5
13
40
42 ¼
52 ½
53 ½
1 ½
1
¾
¾
570
60T199
57
28 ¼
5
13
40
42 ¼
52 ½
53 ½
1 ½
1
¾
¾
570
100T150
77 5/8
28 ¼
5
13
60
62 ¼
73 1/8
74 ¾
1 ½
1
¾
¾
900
100T199
77 5/8
28 ¼
5
13
60
62 ¼
73 1/8
74 ¾
1 ½
1
¾
¾
900
100T250
77 5/8
28 ¼
5
13
60
62 ¼
73 1/8
74 ¾
1 ½
1
¾
1
900
100T300
77 5/8
28 ¼
5
13
60
62 ¼
73 1/8
74 ¾
1 ½
1
¾
1
900

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7
Icon System
Features of ICON System Module
xWater heater digital display on control board for setting and displaying the temperature setpoint. Pressing
temperature UP and DOWN buttons changes the temperature setpoint. Temperature format may be
displayed in °F or °C.
xSingle control board with plug in wiring controls temperature, ignition, and blower operation.
xPlug in wiring reduces chance of miswiring.
xBurner ignition with direct spark ignition –A high voltage spark jumps from the spark rod to the burner
surface to ignite the gas.
xWater heater digital display will show diagnostic codes in the event the water heater needs servicing. Aids
in diagnosing and servicing the water heater.
xWater heater digital display can show previous error code history to further aid in servicing the water heater.
Power Supply Dedicated 120 VAC, 60 Hz, 15A
Gas Supply
Minimum ¾" NPT
(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 8.
Approved Vent
Materials
PVC, CPVC, Polypropylene, or Stainless Steel
Minimum Clearance
for Servicing 18" from top, 24" from front, 4" sides and rear.
Maximum Water
Supply Pressure
150 PSI
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
Control Display
Digital display, 24 volts. Temperature Range: 70-180°F. Used to set tank
temperature (°F or °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 SOLA Control.
Transformer 120VAC primary, 24VAC secondary, 40VA.
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.
Gas Valve Negative regulation, 24 VAC, ½" PSI max., 4.5" W.C. Minimum running inlet.
Vent Safety Switch Normally closed, opens @ 350°F, manual reset.
Blocked Vent
Pressure Switch
24VAC, normally closed, opens when pressure increases to +2.70 W.C.
Blower 120VAC, 60Hz, 1-4 amps

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8
Vent Tables
Maximum Vent Length
Table 3 - Maximum Vent Length (Combined Maximum Length for Intake and Exhaust)
60T-125
60T-150
100T-150
60T-199
100T-199
2” Vent Pipe
Power Direct
Vent
Power Vent
Power Direct
Vent
Power Vent
Power Direct
Vent
Power Vent
Max. Intake
Length
15 ft
(4.5 m)
N/A
15 ft
(4.5 m)
N/A
15 ft
(4.5 m)
N/A
Max. Exhaust
Length
15 ft
(4.5 m)
30 ft
(9.2 m)
15 ft
(4.5 m)
30 ft
(9.2 m)
15 ft
(4.5 m)
30 ft
(9.2 m)
60T-125
100T-150
60T-150
100T-199
60T-199
100T-250
100T-300
3” Vent Pipe
Power Direct
Vent
Power Vent
Power
Direct Vent
Power
Vent
Power
Direct Vent
Power
Vent
Power
Direct Vent
Power
Vent
Max. Intake
Length
60 ft
(18.3 m)
N/A
50 ft
(15.2 m)
N/A
40 ft
(12.2 m)
N/A
30 ft
(9.2 m)
N/A
Max. Exhaust
Length
60 ft
(18.3 m)
120 ft (36.5
m)
50 ft
(15.2 m)
100 ft
(30.5 m)
40 ft
(12.2 m)
80 ft (24.3
m)
30 ft
(9.2 m)
60 ft
(18.3 m)
4” Vent Pipe
Power Direct
Vent
Power Vent
Power
Direct Vent
Power
Vent
Power
Direct Vent
Power
Vent
Power
Direct Vent
Power
Vent
Max. Intake
Length
85 ft
(25.9 m)
N/A
75 ft
(22.8 m)
N/A
65
(19.8 m)
N/A
55
(16.7 m)
N/A
Max. Exhaust
Length
85 ft
(25.9 m)
170 ft
(51.8 m)
75 ft
(22.8 m)
150 ft
(45.7 m)
65
(19.8 m)
130
(39.6 m)
55
(16.7 m)
110
(33.5 m)
60T-125 60T-150 60T-199 100T-150
6” Vent Pipe
Power
Direct Vent
Power
Vent
Power
Direct Vent
Power
Vent
Power
Direct Vent
Power
Vent
Power
Direct Vent
Power
Vent
Max. Intake
Length
85
(25.9 m)
N/A
75
(22.8 m)
N/A
65
(19.8 m)
N/A
85
(25.9 m)
N/A
Max. Exhaust
Length
85
(25.9 m)
170 ft
(51.8 m)
75
(22.8 m)
150
(45.7 m)
65
(19.8 m)
130
(39.6 m)
85
(25.9 m)
170 (51.8
m)
100T-199 100T-250 100T-300
6” Vent Pipe
Power
Direct Vent
Power
Vent
Power
Direct Vent
Power
Vent
Power
Direct Vent
Power
Vent
Max. Intake
Length
75
(22.8 m)
N/A
65
(19.8 m)
N/A
60
(18.3 m)
N/A
Max. Exhaust
Length
75
(22.8 m)
150
(45.7 m)
65
(19.8 m)
130
(39.6 m)
60
(18.3 m)
120
(36.6 m)
WARNING!
The 100T250 and 100T300 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 100T250/300 models.
Unbalanced Direct Vent Systems
Air intake CAN NOT exceed exhaust
by more than 30 feet.

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9
Venting Tables Cont.
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: 100T199
A 3" 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.

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10
Sequence of Operation
1. Thermostat calls for heat.
2. Combustion blower starts at a reduced rpm for a “soft” start light off.
3. Blower pre-purge period of approximately 15 seconds.
4. Ignition control board runs an internal verification safety check for approximately 15 seconds.
5. Trial for ignition (approximately 5 seconds per trial, 3 trials total):
a. Spark establishing period (3 seconds), gas valve opens, sparks from spark rod to ground
rod, igniting the fuel air mixture at the burner surface.
b. Burner on, flame proving period (2 seconds). Requires a minimum of 1 microamp through
the flame sense rod to prove flame.
c. If the blocked vent pressure switch contacts (normally closed) are open, then the ignition
sequence will not start and error code “67” (pressure switch failed to close/open or vent
safety switch failed to close/open) will flash once on the digital display. The unit will then
go into pre-purge/“Hold” while the unit is waiting for the issue to be corrected. If the issue
continues to occur, the digital display with flash error code “137” (pressure switch is open,
or vent safety switch is open) while the unit is waiting to restart (5 minutes) the normal
sequence of operation.
6. Once the flame signal is verified, the blower will remain at the “soft” start RPM for 5 seconds to
stabilize the flame.
7. Steady state operation – Burner continues to operate until:
a. The thermostat circuit opens, gas valve closes, and blower continues to operate for 30
second post-purge period.
b. If the blocked vent pressure switch contacts open (normally closed) while the burner is on,
then the gas valve closes, and the unit will retry a normal sequence of operation. If issue
remains on restart, the unit will go into recycle as described in 5c.
8. Thermostat is satisfied.
9. Gas valve closes and burner is extinguished.
10. Blower post purge for 30 seconds at maximum RPM.