Bradford White EF120T User manual

238-53506-00C REV 3/20
HIGH EFFICIENCY COMMERCIAL GAS WATER HEATER
INSTALLATION & OPERATION MANUAL
WITH TROUBLESHOOTING GUIDE
SAVE THESE INSTRUCTIONS AND KEEP FOR FUTURE REFERENCE
-Do NOT store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
-WHAT TO DO IF YOU SMELL GAS
•Do NOT try to light any appliance.
•Do NOT touch any electrical
switch; Do NOT use any phone in
your building.
•Immediately call your gas supplier
from a neighbor’s phone. Follow
the gas supplier’s instructions.
•If you cannot reach your gas
supplier, call the fire department.
-For customer comfort, safety, and
convenience, it is recommended this
water heater be installed and serviced
by a plumbing professional.
If the information in these
instructions are not followed
exactly, a fire or explosion may
result causing property damage,
personal injury, or death.
WARNING
EF120T Model

2
TABLE OF CONTENTS
SECTION I: IMPORTANT INFORMATION
NOTICE
This water heater has a limited warranty. The warranty for this water heater is valid only if the water heater
has been installed, maintained, and operated in accordance with these instructions.
SECTION I: IMPORTANT INFORMATION...................2
SECTION II: SPECIFICATIONS ....................................5
SECTION III: GENERAL INFORMATION......................6
SECTION IV: INSTALLATION INSTRUCTIONS..........9
SECTION V: WATER CONNECTIONS ......................15
SECTION VI: VENTING ..............................................17
SECTION VII: GAS CONNECTIONS ..........................38
SECTION VIII: ELECTRICAL CONNECTIONS ..........40
SECTION IX: OPERATING INSTRUCTIONS .............41
SECTION X: MAINTENANCE .....................................47
SECTION XI: DIAGNOSTIC AND
TROUBLESHOOTING GUIDE .....................................52
This gas-fired water heater is design certified by CSA International under the American National Standard, Z21.10.3
(as indicated on the rating plate) and CAN/CGA 4.3-M (as indicated on the rating plate) available from CSA Standards
Association, 5060 Spectrum Way, Mississauga, Ontario, CANADA L4W 5N6.
This water heater must be installed in accordance with local codes. In the absence of local codes, it must be installed
in compliance with the National Fuel Gas Code (ANSI Z223.1-Latest Edition), or in Canada CAN/CGA B149.1 Natural
Gas Installation Code (Latest Edition) or CAN/CGA B149.2 Propane Installation Code (Latest Edition).
The following terms are used throughout this manual to bring attention to the presence of hazards at
various risk levels, or to important information concerning product life.
READ CAREFULLY
Indicates special instructions on installation,
operation or maintenance, which are important
but not related to personal injury hazards.
NOTICE
Indicates a potentially hazardous situation,
which, if not avoided, could result in death,
serious injury or substantial property damage.
WARNING
Indicates potentially hazardous situation, which, if
not avoided, may result in moderate or minor
injury or property damage.
CAUTION
Indicates an imminently hazardous situation,
which, if not avoided, will result in death, serious
injury or substantial property damage.
DANGER

3
DANGER
DO NOT store or use gasoline or other flammable, combustible, or corrosive vapors and/or liquids in the vicinity of
this or any other appliance.
DO NOT install any damaged venting system components. If damage is evident then please contact the supplier
where the water heater was purchased, or the manufacturer listed on the rating plate for replacement parts.
Use only vent terminals provided or factory authorized terminals for venting this water heater.
This water heater is equipped with an adjustable thermostat to control water temperature. Hot water temperatures
required for automatic dishwasher and laundry use can cause scald burns resulting in serious personal injury
and/or death. The temperature at which injury occurs varies with the person’s age and the time of exposure. The
slower response time of disabled persons and elderly increases the hazards to them. NEVER allow small children
to use a hot water tap, or to draw their own bath water. NEVER leave a child or disabled person unattended in a
bathtub or shower.
Failure to properly install the vent and air intake (if applicable) system could result in property damage, personal
injury, or death.
WARNING
Improper installation, adjustments, alteration, service, or maintenance can cause property damage, personal injury,
or loss of life. Failure to follow all instructions in the proper order can cause personal injury or death. Read and
understand all instructions, including all those provided with the appliance before installing, starting-up, operating,
servicing, or maintaining this appliance. Keep this manual and literature in legible condition with this water heater
for reference by owner and service technician.
This water heater requires regular maintenance and service to operate safely. Follow the instructions contained in
this manual.
Installation, maintenance, and service must be performed only by a qualified, skilled, and knowledgeable installer
or service provider.
Installation is NOT complete unless a temperature and pressure relief valve is installed into the proper location at
the top of this water heater.
It is the responsibility of the installing contractor to see that all controls are correctly installed and are properly
operating when the installation is complete.
This water heater is suitable for installation on combustible flooring. DO NOT install water heater directly on
carpeting.
DO NOT operate this water heater without first being certain it is filled with water.
DO NOT tamper with or alter the water heater and/or controls.
DO NOT operate water heater with jumpered or absent controls or safety devices.
DO NOT operate water heater if any external part has been under water. Immediately call a qualified service
agency to inspect the appliance and to replace any part of the control system, including gas controls, that has been
under water.
DO NOT attempt to use this water heater with any gas other than the type listed on the rating plate. DO NOT
attempt to convert this water heater for use with a gas other than the type for which it is equipped. Failure to use
the proper gas can create an unsafe condition resulting in property damage, personal injury, or death. Consult your
local gas supplier or gas company if there are any questions.
DO NOT operate this water heater if the input rate exceeds the rate shown on the water heater rating plate.
This water heater contains very hot water under high pressure. DO NOT unscrew any pipe fittings or attempt to
disconnect any components of this water heater without assuring the water is cool and is NOT under pressure.
Always wear protective clothing and equipment when installing, starting up, or servicing this water heater to
prevent scald injuries. DO NOT rely on the temperature gauges to determine the temperature. DO NOT touch any
components unless they are cool.
This water heater must be properly vented and connected to an approved vent system in good condition. DO NOT
operate water heater with the absence of an approved vent system. A clean and unobstructed vent system is
necessary, to allow noxious fumes that could cause injury or loss of life, to vent safely and will contribute toward
maintaining the water heater’s efficiency.
DO NOT use this appliance if any external part to the tank has been submerged in water. You should contact a
qualified service technician to inspect the appliance and to replace any part of the control system including the
combination gas control which has been submerged in water. See the Gas Connections section of this manual
before servicing or replacing a water heater that has had any external part to the tank submerged in water.

4
WARNING
This water heater needs fresh air for safe operation and must be installed so there are provisions for adequate
combustion and ventilation air. Insufficient air supply will cause a recirculation of combustion products resulting in
contamination that may be hazardous to life. This will result in carboning or sooting of the combustion chamber,
burners, and flue tubes and creates a risk of asphyxiation.
This water heater requires its own separate venting system. DO NOT connect the exhaust vent into an existing
vent pipe or chimney.
Flammable items, pressurized containers, or any other potential fire hazardous articles must NEVER be placed on
or adjacent to the water heater. Open containers of flammable material should NOT be stored or used in the same
room with this water heater.
Insulation blankets are not required for this water heater. This water heater meets or exceeds the ASHRAE/IES
90.1b (latest edition) standards with respect to insulation and standby loss requirements.
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 a hot water faucet to be open for several minutes
before you use any electrical appliance which is connected to the hot water system. If hydrogen is present, there
will be unusual sounds 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
Prior to connecting the gas supply line to a gas fired water heater, ensure that the gas supply line does NOT have
moisture/water or dirt/scale inside the gas line. Commonly this check is done at the lowest point in the gas
distribution system prior to gas burning appliances.
WARNING
Liquefied petroleum gases/propane gas is heavier than air and will remain at floor level if there is a leak.
Basements, crawl spaces, closets and areas below ground level will serve as pockets for accumulation of leaking
gas. Before lighting, smell all around the appliance area for gas. Be sure to smell next to the floor.
IF YOU SMELL GAS:
•DO NOT try to light any appliance.
•DO NOT touch any electric switch; DO NOT use any telephone in your building.
•Immediately call your gas supplier from a telephone in another building. Follow the gas supplier’s instructions.
•If you cannot reach your gas supplier, call the fire department.
DO NOT OPERATE THE APPLIANCE UNTIL THE LEAKAGE IS CORRECTED!
NSF Compliance
To comply with NSF (National Sanitation Foundation) requirements, this water heater must be sealed to the
floor with sealant, in a smooth and easily cleanable way.

5
SECTION II: SPECIFICATIONS
Figure 1 –Dimensional Layout
Table 1 –Specifications
DIMENSIONS (INCHES)
Model No.
Input
Rate
BTU/h
Storage
Capacity
U.S.
Gallons
A
Height
B
Floor to
Alt. Hot
Water
Outlet
C
Dia.
D
Floor to
Vent
Outlet
E
Floor to
Inlet
Water
Conn.
F
Floor to
T&P
Valve
Conn.
G
Floor to
Hot Outlet
Water
Conn.
H
Floor to
Top of
Heater
EF120T400
399,999
119
77 1/8
70 3/8
33
6 ¾
12 ¼
58 ½
61 ¼
68 ¼
EF120T500
499,999
119
77 1/8
70 3/8
33
6 ¾
12 ¼
58 ½
61 ¼
68 ¼
Model No.
Input
Rate
BTU/h
Storage
Capacity
U.S.
Gallons
J
Floor to
Air
Intake
K
Floor to
Gas
Conn.
Front
Water
Conn.
Dia.
Space
Heating
Conn.
Dia.
Gas
Conn.
Dia.
Relief
Valve
Open
Shipping
Wt.
(LBS)
EF120T400
399,999
119
71
73 ¾
1 ½
1
1
1
1120
EF120T500
499,999
119
71
74 7/8
1 ½
1
1
1
1135
DIMENSIONS (MILLIMETERS)
Model No.
Input
Rate
KW
Storage
Capacity
Liter
A
Height
B
Floor to
Alt. Hot
Water
Outlet
C
Dia.
D
Floor to
Vent
Outlet
E
Floor to
Inlet
Water
Conn.
F
Floor to
T&P
Valve
Conn.
G
Floor to
Hot Outlet
Water
Conn.
H
Floor to
Top of
Heater
EF120T400
117.22
450
1959
1787
838
171
311
1486
1556
1733
EF120T500
146.54
450
1959
1787
838
171
311
1486
1556
1733
Model No.
Input
Rate
KW
Storage
Capacity
Liter
J
Floor to
Air
Intake
K
Floor to
Gas
Conn.
Front
Water
Conn.
Dia.
Space
Heating
Conn.
Dia.
Gas
Conn.
Dia.
Relief
Valve
Open
Shipping
Wt.
(LBS)
EF120T400
117.22
450
1803
1873
38
25
25
25
508
EF120T500
146.54
450
1803
1902
38
25
25
25
515

6
SECTION III: GENERAL INFORMATION
This water heater contains the following features:
Main Power On/Off Switch
The front panel of this water heater has an ON/OFF switch, which has markings to indicate whether the main power to the
water heater is turned on or off.
Combustion System
This water heater is equipped with a self-compensating negative pressure pre-mix combustion system. As the blower
operates, air is drawn in through the air intake and into a venturi, which pulls gas from the gas valve. The gas and air are
then mixed in the combustion blower and sent through the transition tube into the burner. The Direct Spark Ignition (DSI)
System then ignites the gas/air fuel mixture to produce flue products (combustion). The flame sensor signals the ignition
control board (described below) that a flame is present.
Honeywell Integrated Control
The Integrated Control System consists of a control board and a digital water heater display. The digital water heater
display is on the top front of the water heater for setting and displaying the temperature setpoint and monitoring the status
of the water heater. Pressing the temperature UP and DOWN buttons changes the temperature setpoint. The temperature
format may be displayed in degrees F or degrees C. The water heater display will show diagnostic codes in the event the
water heater needs servicing. The temperature readings of the tank sensor can be monitored in Service Mode. The
display can show up to 10 previous error codes in Service Mode to further aid in servicing the water heater.
The single control board has plug in wiring harnesses to reduce the chance of mis-wiring. The control board controls the
combustion blower, ignition timings, and gas valve to run the combustion system in order to maintain the desired tank
temperature. The sequence of operations is described in detail in the Diagnostic Section (page 52).
Adjustable Thermostat
This water heater is equipped with an adjustable thermostat as part of the Integrated Control System to control water
temperature. Hot water temperatures required for automatic dishwasher and laundry use can cause scald burns resulting
in serious personal injury and/or death.
The temperature may be adjusted from about 100°F (38°C) to about 180°F (82°C). The thermostat was adjusted to 100°F
(38°C) before the water heater was shipped from the factory. It is recommended that lower temperatures be used to avoid
the risk of scalding. Refer to the scald warnings and the section on scalding in Section V: Water Connections (page 15). It
is further recommended, in all cases, that the water temperature be set for the lowest temperature that satisfies your hot
water requirements for the installation. This will also provide the most energy efficient operation of the water heater and
minimizes scale formation.
Setting the water heater temperature at 120°F (49°C) will reduce the risk of scalds. Some states require setting lower
temperatures for specific installations.
The top immersion well of the single sensor control contains a redundant sensor for the high limit (energy cutoff). The high
limit circuit interrupts the main burner gas flow, should the water temperature exceed approximately 207°F (97.2°C). Error
code “80” will be shown on the water heater control display if the high limit temperature has been exceeded. Should the
high limit switch activate, it must be manually reset. This should only be done by a qualified service technician after the
cause of overheating has been corrected.
Contact your qualified installing contractor, service provider, or the manufacturer listed on the rating plate if continued high
limit operation occurs.
Service Panels
The service panels are located behind the service panel access covers, which are located around the exhaust elbow side
of the water heater. These panels contain a pressure switch that monitors the pressure in the exhaust pipe in case the
vent system becomes blocked. An exhaust high limit switch is used to monitor the ambient temperature of the exhaust
collector. This is a manually resettable switch. If this switch continues to trip, please contact an authorized service agency.
Latches
The latches allow easy access for servicing the water heater from the top. Open the three latches and lift the surround up
for servicing. No tools are required to obtain access to the top of the water heater. Replace the surround and re-latch
when the service has been completed.

7
Temperature and Pressure Relief Valve
WARNING
Keep clear of the combination temperature and pressure relief valve discharge line outlet. The discharge may
be hot enough to cause scald injury. The water is under pressure and may splash.
For protection against excessive temperatures and pressure, install temperature and pressure protective
equipment required by local codes; not less than a combination temperature and pressure relief valve certified by
a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment or
materials as meeting the requirements of the Standard for Relief Valves and Automatic Gas Shutoff Devices for
Hot Water Supply Systems, ANSI Z21.22 and the Standard CAN1-4.4 Temperature, Pressure, Temperature and
Pressure Relief Valves and Vacuum Relief Valves. The combination temperature and pressure relief valve must
be marked with a maximum set pressure that does NOT exceed the maximum working pressure of the water
heater. The combination temperature and pressure relief valve rating must NOT be less than the hourly rating of
the water heater.
Install the combination temperature and pressure relief valve into the opening provided and marked for this
purpose on the water heater.
Note: Some models may already be equipped or supplied with an installed combination temperature and
pressure relief valve. Verify that the combination temperature and pressure relief valve is in compliance with local
codes. If the combination temperature and pressure relief valve does not comply with local codes, replace it with
one that does. Follow the installation instructions above on this page.
Install a discharge line so that water discharged from the combination temperature and pressure relief valve will
exit within 6 in (15.2 cm) above, or any distance below the structural floor and cannot contact any live electrical
part. The discharge line is to be installed to allow for complete drainage of both the combination temperature and
pressure relief valve and the discharge line where it will NOT damage property. The discharge opening must NOT
be subjected to blockage or freezing. DO NOT thread, plug or cap the discharge line. It is recommended that a
minimum clearance of 4 in (10.2 cm) be provided on the side of the water heater for servicing and maintenance of
the combination temperature and pressure relief valve.
DO NOT place a valve between the combination temperature and pressure relief valve and the tank.
Condensate Drain
The water heater should either be raised several inches above the floor on a concrete slab or use a low-profile
condensate pump to allow free drainage of condensate from the elbow drain fitting. This water heater is a
condensing type unit and requires a drain to be located in close proximity to allow the condensate to drain
safely. The condensate drains from the unit at the field installed exhaust condensate elbow located near the
bottom of the unit. Using 1” PVC create a drain trap, as shown in Figure 2, which connects to the condensate
elbow using the supplied rubber coupler.
Also use 1” PVC from the drain trap to the drain. Make sure the condensate drains line slopes down, away
from the water heater at least 1/8 in per foot toward the drain. The condensate drain pipe must NOT be routed
through an area subject to below freezing temperatures. The condensate build-up will block the exhaust outlet,
which will cause improper operation. Refer to Figure 2 for the proper connection of an elbow to the drain outlet
and a condensate trap.
CAUTION
Failure to properly install the condensate drain as directed above, as well as shown in Figure 2, may result in
damage and/or cause improper operation of to the water heater. Any damage resulting from failure to install
the condensate drain as directed will NOT be covered by the warranty.

8
Figure 2 –Condensate Elbow with Trap
*Outlet of condensate trap must not be higher than outlet of condensate elbow
Condensate Neutralization
The condensate draining from the water heaters covered in this manual have PH levels between 4.3 and 5.0.
Install a commercially available neutralizing kit if required by local code.
NOTE: Lower PH levels are acidic. Do NOT connect a metal drain line, such as copper, to the water heater for
this reason.
Cleanout
These models are equipped with a cleanout opening to aid in removal of hard water deposits from the tank
bottom. If this water heater operates under hard water conditions, the following should be performed at least
every 3 months: Turn OFF the water supply and drain the water heater. Remove the cleanout jacket cover and
tank cover. When cleaning the tank, care must be taken to avoid trying to break deposits loose as this could
damage the glass lining and shorten the life of the water heater. After cleaning, inspect gasket and reuse or
replace, re-install the cleanout tank cover and jacket cover, and refill with water. Refer to Section X:
Maintenance (page 47) for the procedures for filling and draining the water heater.
Powered Anode System
The powered anode system provides corrosion protection to the tank by supplying a low voltage current to the
titanium anode rods and then periodically comparing this current with the potential between the anode rod and
tank wall to make corrections. The powered anode system is designed to extend the tank life without requiring
anode rod replacement. The powered anode system consists of titanium powered anode rods and a powered
anode control module located on the control panel. More details on the powered anode system are in Section
X: Maintenance (page 47).
Dishwashing Machine Requirements
All dishwashing machines meeting the National Sanitation Foundation requirements are designed to operate
with water flow pressures between 15 and 25 lbs/in2. Flow pressures above 25 lbs/in2, or below 15 lbs/in2, will
result in improperly sanitized dishes.
The National Sanitation Foundation also recommends circulation of 180°F (82°C) water. Where this is done,
the circulation should be very gentle so that it does not cause any unnecessary turbulence inside the water
heater. The circulation should be just enough to provide 180°F (82°C) water at the point of take-off to the
dishwashing machine. Adjust flow by means of the valve in the circulation line.

9
SECTION IV: INSTALLATION INSTRUCTIONS
WARNING
INSTALLATION OF THIS WATER HEATER REQUIRES ABILITY EQUIVALENT TO THAT OF A
LICENSED TRADESMAN IN THE FIELD INVOLVED. PLUMBING, AIR SUPPLY, VENTING, GAS
SUPPLY AND ELECTRICAL WORK ARE REQUIRED.
DO NOT ATTEMPT TO LIGHT ANY GAS APPLIANCE IF YOU ARE NOT CERTAIN OF THE
FOLLOWING:
•Liquefied petroleum gases/propane gas and natural gas have an odorant added by the gas supplier that
aids in detection of the gas.
•Most people recognize this odor as a “sulfur” or “rotten egg” smell.
•Other conditions, such as “odorant fade” can cause the odorant to diminish in intensity, or “fade,” and not
be as readily detectable.
•If you have a diminished sense of smell or are in any way unsure of the presence of gas, immediately
contact your gas supplier from a telephone in another building.
•Gas detectors are available. Contact your gas supplier or plumbing professional for more information.
Liquefied petroleum gases/propane gas is heavier than air and will remain at floor level if there is a leak.
Basements, crawl spaces, closets, and areas below ground level will serve as pockets for accumulation of
leaking gas. Before lighting, smell all around the appliance area for gas. Be sure to smell next to the floor.
IF YOU SMELL GAS:
•DO NOT try to light any appliance.
•DO NOT touch any electric switch; DO NOT use any telephone in your building.
•Immediately call your gas supplier from a telephone in another building. Follow the gas supplier’s
instructions.
•If you cannot reach your gas supplier, call the fire department.
DO NOT OPERATE THE APPLIANCE UNTIL THE LEAKAGE IS CORRECTED!
WARNING
This water heater must be located in an area where leakage of the tank, water line connections, or the
combination temperature and pressure relief valve will not result in damage to the area adjacent to the
water heater or to lower floors of the structure. When such locations cannot be avoided, a suitable drain pan
must be installed under the water heater. The drain pan depth must be suitable for draining and collecting
water and have a minimum diameter of at least 4 in (10.2 cm) or greater measured from the jacket of the
water heater. The drain pan, as described above, can be purchased from your plumbing professional. The
drain pan must be piped to an adequate drain. The piping must be at least 3/4 in (2 cm) in diameter and
pitched for proper drainage.
Anode rods have been installed in the tank head of the water heater to extend tank life. The removal of these
anodes, except for inspection and/or replacement, will nullify the warranty. In areas where water is unusually
active, an odor may occur at the hot water faucet due to a reaction between the anode and the impurities in the
water. If this should happen, alternative anodes may be purchased from the supplier that installed this water
heater. This will minimize the odor while protecting the tank. Additionally, the water heater should be flushed
with appropriate dissolvers to eliminate any bacteria.
Note: For California installation this water heater must be braced, anchored, or strapped to avoid
falling or moving during an earthquake. See instructions for correct installation procedures.
Instructions may be obtained from the DSA Headquarters Office: 1102 Q Street, Suite 5100,
Sacramento CA 95811.
THIS WATER HEATER MUST BE INSTALLED INDOORS OUT OF THE WIND AND WEATHER.
THIS WATER HEATER MUST NOT BE INSTALLED IN ANY LOCATION WHERE GASOLINE OR
FLAMMABLE VAPORS ARE LIKELY TO BE PRESENT, UNLESS THE INSTALLATION IS SUCH TO
ELIMINATE THE PROBABLE IGNITION OF GASOLINE OR FLAMMABLE VAPORS.

10
Unpacking/Inspection
1. Inspect carefully for any signs of damage.
2. Any claims for damage or shortage in shipment must be filed immediately with the shipper and noted
on the Bill of Lading.
NOTICE
The vent terminal that is supplied with this water heater are stored at the top in the Combustion Assembly
Compartment. The condensate elbow and rubber couplers are secured to the bottom of the crating.
Locating the Water Heater
1. Locate the water heater in front of final position before removing the crate.
2. Locate so that venting connections will be short and direct.
3. This water heater is suitable for installation on combustible floor. Do NOT install this water heater
directly on carpeting. If the water heater is to be installed on carpeting, it must be installed on top of a
metal or wood panel extending beyond the full width and depth of the appliance by at least three 3 in
(7.6 cm) in any direction or, if the appliance is to be installed in an alcove or closet, the entire floor must
be covered by the panel.
4. For basement installation, provide a solid, level, and elevated base such as concrete or other suitable
pad to raise the water heater at least 3 in (7.6 cm) to provide a slope of 1/4 in/ft (.635 cm/m) for the
condensate line to a suitable drain.
5. Minimum clearance to combustible material is 0 in (0 cm) for the Top, Sides, and Rear of this water
heater. However, it is recommended that at least 18 in (45.7 cm) from the Top, 24 in (61 cm) from
the Front, 4 in (10.2 cm) for the Left Side and Rear, and 12 in (30.5 cm) from the Right Side
Exhaust Elbow of the water heater be provided for servicing. Clearance for servicing may be
reduced down to minimum clearance to combustible material, but service time and effort may be greatly
increased.
Figure 3a –Minimum Clearance to Combustible Material