Bradford White eF Series User manual

Save this manual for future reference
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.

4
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.

6
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

7
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

8
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.

9
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.

10
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.

11
11
Sequence of Operation
Lockout Conditions
The system will go into lock out mode for the following reasons:
1. ERROR CODE 110
a. 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 digital display indicates a lockout condition by showing error code 110 with “Service Needed”
on the control board’s digital display. Refer to error codes in the diagnostic section of this Service Manual. In a
soft lockout condition, the control will wait for 15 minutes and then make 3 more attempts to light the main burners.
Soft lockout reset is accomplished by depressing the lower right button under “Reset” for 3 seconds.
2. ERROR CODE 80
a. If the temperature at the top of the tank should exceed 207°F, then the high limit control will shut off the burner
and the water heater will go into a hard lockout. Error code 80 will be shown on the control board’s digital display.
The control board can only be reset in the Service Mode, which is detailed in the ICON System Troubleshooting
section of this Service Manual (pg 14).
3. ERROR CODE 67
a. If the exhaust terminal becomes blocked or the condensate elbow fails to drain condensate, the normally closed
exhaust pressure switch will open, the gas valve will close, and error code 67 will appear on the digital display.
When the condition is corrected, the error code will disappear, and the water heater will resume normal operation.
No resetting of the control board is needed for the pressure switch error code.
b. If the vent safety switch located near the exhaust pressure switch should open, the gas valve will close, the blower
will post-purge, and error code 67 will appear on the control board’s digital display. The lockout condition will reset
once the problem is corrected and the switch is reset. Refer to Vent Safety Switch Testing and Replacement in
this Service Manual (pg 47).
c. The pressure switch and temperature switch are wired in series. As a result, the water heater will not function
unless both switches are operational.

12
12
Building Management System (BMS)
All water heaters with ICON Systems can be equipped with a gateway kit that will facilitate a Building
Management System (BMS) connection to Modbus or Bacnet®. This kit is sold separately and is not
factory installed. A full installation, operation, and troubleshooting manual is provided with the
gateway kit.
CAUTION
Before beginning any Troubleshooting operations listed below, please note that the gateway kit and BMS may
need to be disconnected from the heater. Please ensure this has been completed before proceeding with any
troubleshooting operation that may be impacted by settings in the BMS.
BMS Mapping
Map Descriptor
Name
Modbus
Register
Read/Write
BACnet
Object ID
Note
Demand source 00006 Read 001
Current demand source:
0 = Unknown
1 = No source demand
2 = CH
3 = DHW
4 = Lead Lag slave
5 = Lead Lag master
6 = CH frost protection
7 = DHW frost protection
8 = No demand due to burner switch (register 199) turned off
9 = DHW storage
10 = Reserved
11 = Warm weather shutdown
12 = Hot standby
Firing rate
00008
Read
002
Actual firing rate (% or RPM)
Fan speed
00009
Read
003
RPM
Flame signal
00010
Read
004
0.01V or 0.01 μA precision (0.00-50.00V)
Tank temperature
sensor
00012 Read 005 -40-130(0.1C precision)
Appliance setpoint
00017
Read
006
-40-130(0.1C precision)
Burner status 00032 Read 007
0 = Disabled
1 = Locked out
2-3 = Reserved
4 = Anti-short cycle
5 = Unconfigured safety data
6-33 = Reserved
34 = Standby Hold
35 = Standby Delay
Lockout code 00034 Read 008
0 = No lockout
1-4096
Appliance status 00080 Read 009
0 = Unknown
1 = Disabled
2 = Normal
3 = Suspended
DHW priority count 00082 Read 010
Countdown of time when DHW has priority over CH (secs).
Applicable when DHW priority time is enabled.
Burner run time
00130/00131
Read
011
Hours
Controller cycle count
00142/00145
Read
012
0-999,999
Controller run time
00144/00145
Read
013
Hours
Alarm reason 0035 Read 014
0 = None
1 = Lockout
2 = Alert
3 = Other
DHW setpoint
0453
Read/Write
015
40-130(0.1C precision)

13
13
BMS Wiring Diagram
NOTICE
The Building Management System (BMS) is only compatible with units that have SOLA controllers.
Part Bradford White Part Number
BMS Gateway Installation Kit 415-53943-00

14
14
Troubleshooting
System Observation
Water Heater Fault: Water heater does NOT operate.
Display Error Code: Water heater digital display does
NOT operate - blank display.
Is 24-28 VAC present between
red and black wire pin
connections located on the front
of the control board terminal J3?
Verify secondary voltage at the control
board.
Refer to control board
illustration. Voltage at
connector location J8 across
blue and yellow wires should
be 24-28 VAC. If not, check
transformer. Replace
transformer if defective.
Does the water heater digital
display operate? Increase
thermostat setting if tank is warm.
Digital display
operates–see
next page.
Check main power supply to water heater.
Check fuse, circuit breaker, plug receptacle, line
cord, and wiring to water heater.
Check to make sure switch on front of control
board is in the ON position.
Replace
digital
display.
Replace
control board.
Check wire harness
for proper continuity.
Check wires for proper
termination to control board. Are
wire terminations connected
properly to digital display?
N
Y
N
Y
Y
Refer to control board
illustration. Voltage at
transformer across black and
white wires should be 110-120
VAC. Verify 120V from the
power switch.
Verify primary voltage at the transformer.
WARNING
120 volt potential exposure. Use caution making
voltage checks to avoid personal injury.
CAUTION
Use caution to NOT damage connectors when
making voltage measurements or jumping terminals.
Black & White
wires
Yellow & Blue
wires
SOLA Control Board Schematic

15
15
SOLA Control Board Schematic
WARNING
120 volt potential exposure. Use caution making
voltage checks to avoid personal injury.
Troubleshooting
CAUTION
Use caution to NOT damage connectors when
making voltage measurements or jumping terminals.
Error code 62 on display. Measure voltage
between black and white wires, of the 3
wire harness, at the blower (make sure the
digital display shows “heating” in the status
mode, if not increase the setpoint). Is there
110-120 VAC?
Verify 120V from power switch. Replace
power cord/blower harness if digital
display shows “heating” and no voltage
is present to the blower.
Check that the 5 wire blower
modulation harness is plugged
in to the blower.
Plug in the wire harness (If this
harness is unplugged blower will
run constantly).
See Combustion System Testing
and Replacement (pg 30).
Does burner continue until
thermostat set point is
reached? See setting
display in Service Mode
and displaying
temperature sensors.
Does blower post-purge for
30 seconds?
System O.K.
Check to see if digital
display shows any other
error codes (67–pressure
switch, 67–vent safety
switch, or 80–high limit).
If so, refer to the
appropriate section(s) for
testing and replacement.
Remove high voltage wire connected at
the spark rod and hold approximately 1/4”
from metal ground with insulated pliers
during the ignition cycle (3 second spark
trial period). Is there spark to ground?
Check resistance of high voltage
cable. Resistance should be 0-1
ohms. If resistance is high, replace
spark cable. If spark cable is good,
replace control board.
Check continuity of spark rod and spark
rod gap to burner (see Spark Rod Gap
Adjustment, pg 49).
Error code 110 on display.
See main burner lights, no
flame signal in section
Combustion System Testing
and Replacement (pg 29).
Continued from
previous page.
Does combustion
blower operate?
Can sparking be
seen/heard at the spark
rod and ground rod?
Replace blower.
Replace control board.
Measure voltage
between yellow (J-2)
and ground. Is there
17-30 VDC?
N
N
N
N
N
N
N
N
Does main burner light?
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y

16
16
Display Control
Water Heater Display and Control Buttons
To Increase Temperature Setpoint
Step 1. Press and hold “Temperature Up” button until desired setpoint temperature appears on the display.
Step 2. Press “DONE” button for new setting to take effect immediately. If the “DONE” button is not pressed,
the new temperature setting will take effect in approximately 10 seconds.

17
17
To Decrease Temperature Setpoint
Step 1. Press and hold “Temperature Down” button until desired setpoint temperature appears on the display.
Step 2. Press “DONE” button for new setting to take effect immediately. If the “DONE” button is not pressed,
the new temperature setting will take effect in approximately 10 seconds.
To View Combustion Rate
Step 1. Select Next while viewing DHW Setpoint in User Mode to access Rate screen. Rate will only be
displayed while the burner is operating.
Step 2. Select Next to go back to the DHW Setpoint screen.

18
18
To Change Temperature Format in Display from q
q
F to q
q
C or C to F
Step 1. Enter “Set-Up Mode” by pressing both UP/DOWN buttons together for 3 seconds.
Step 2. Use the arrows to select between °F and °C
Step 3. Press done to return to main screen or timeout/change will occur in one minute.
An energy cut out (ECO) is incorporated in the sensor and control board which will shut off all gas supply to the burner if
the water heater temperature exceeds 207°F (93°C). Should the ECO function (open), the water temperature should be
reduced to approximately 120°F (49°C) and call a qualified service agent to place the water heater in operation. The water
heater must have the problem corrected by a qualified service person before putting the water heater back in operation. It
is recommended that all service work be performed by a qualified service agency.
If the water heater is to remain idle for 30 days or more or is subjected to freezing temperatures while shut off, the water
heater and piping should be fully drained (See “To Drain the Water Heater”) and the drain valve should be left fully open.
WARNING
Hydrogen gas can be produced in an operating water heater that has not had water drawn from the tank for a
long period of time (generally two weeks or more). HYDROGEN GAS IS EXTREMELY FLAMMABLE. To
prevent the possibility of injury under these conditions, we recommend the hot water faucet to be open for
several minutes at the kitchen sink before you use any electrical appliance which is connected to the hot water
system. If hydrogen is present, there will be an unusual sound such as air escaping through the pipes as hot
water begins to flow. DO NOT smoke or have open flame near the faucet at the time it is open.
WARNING
DO NOT run out of propane gas. Damage to the water heater may occur.

19
19
Troubleshooting
Accessing Diagnostic Mode on the Water Heater Display
(FOR SERVICE PERSONNEL ONLY)
The display has a Diagnostic Mode to access information in aiding servicing of the water heater. This procedure
is for service and installation personnel only. To enter the Diagnostic Mode, follow the steps illustrated below:
WARNING
The following procedure is for service and installation personnel ONLY. Resetting lockout conditions
without correcting the malfunction can result in a hazardous condition.
Step 1. Press and hold the lower right button under “Next” in the lower right display for at least 3 seconds. You
must be in user mode on the DHW temp screen to access diagnostic mode. If in user mode on the view rate
screen, you cannot access diagnostic mode.
Step 2. In the first screen of diagnostic mode the display will show the flame sense current in microamps when
the burner is operating.
NOTICE
The screens will stay in the Diagnostic Mode for 12.5 minutes after the last button press for viewing unless
“Done” button is pressed to exit Diagnostic Mode.

20
20
Step 3. Press the lower right “Next” button. The display will flash and show the number of any alert codes.
These are not currently used.
Step 4. Press lower right “Next” button. The display will flash and show the number of any Lockout codes. If
there are no lockouts, the display will show 00. If there are multiple lockout codes “Next” will scroll through
them.
Step 5. Press “Next”, the display will show “DHW MAX”. This is the maximum allowable temperature that the
unit can get to before a lockout occurs.