Bradford White RG250H6N-475 User manual

238-51012-00J REV 6/19
A Spanish language version of these instructions is available by contacting
the company listed on the rating plate. La versión española de estas
instrucciones se puede obtener al scribirle a la fábrica cuyo nombre aparece
en la placa de especificaciones.
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.
Installation and service must be performed by a qualified
installer, service agency or the gas supplier.
For your family’s comfort, safety and convenience, we
recommend this water heater be installed and serviced by a
plumbing professional.
GAS-FIRED WATER HEATER
INSTALLATION & OPERATION INSTRUCTION
MANUAL For Flammable Vapor Ignition Resistant
System Equipped Water Heater
WARNING: If the information in these instructions is not
followed exactly, a fire or explosion may result causing
property damage, personal injury or death.
FOR YOUR SAFETY
Do not store or use gasoline or other flammable,
combustible, or corrosive vapors and liquids in the
vicinity of this or any other appliance.

2
CONGRATULATIONS!
You have purchased one of the finest water heaters on the market today!
This installation, operation and instruction manual will explain in detail
the installation and maintenance of your new Flammable Vapor Ignition
Resistant Gas Water Heater. We strongly recommend that you contact a
plumbing professional for the installation of this water heater.
We require that you carefully read this manual, as well as the enclosed
warranty, and refer to it when questions arise. If you have any specific
questions concerning your warranty, please consult the plumbing
professional from whom your water heater was purchased. For your
records we recommend that you write the model, serial number and
installation date of your water heater in the maintenance section in the
back of this manual.
This manual should be kept with the water heater.
Special Flammable Vapor Ignition Resistant System:
This water heater is equipped with a Flammable Vapor Ignition Resistant System.
In the event of improper usage or storage of gasoline or other flammable materials
in the location where the water heater is installed, the technology will resist ignition
of the flammable vapors outside the confines of the water heater.
The Flammable Vapor Ignition Resistant System features:
•Advanced Flame Arrestor Design.
•Re-settable Thermal Switch to prevent burner/pilot operation with
restricted airflow.
•Piezo Igniter
•Sight Window to observe operation of pilot and burner.
FOR YOUR SAFETY: Activation of the Flammable Vapor Ignition Resistant
System occurs when flammable vapors are drawn into the water heater and are
combusted. If flammable vapors are detected:
•Do not try to light any appliance.
•Do not touch any electrical switch; Do not use any phone in your building.
•Leave the premises and immediately call the fire department from a
neighbor’s phone. Follow the fire department’s instructions.
Once the flammable vapor has been evacuated, contact your plumbing
professional or the manufacturer for further instructions. Replacement of a
Flammable Vapor Ignition Resistant System equipped water heater due to a
flammable vapor shutdown is not covered under the terms of the limited warranty.

3
TABLE OF CONTENTS page
GENERAL INFORMATION........................................................... 4
INSTALLATION............................................................................ 6
Locating The Water Heater ................................................... 6
Minimum Clearances............................................................. 9
Venting................................................................................... 10
Combustion Air Supply......................................................... 11
Water Connections................................................................ 13
Gas Connections................................................................... 16
GENERAL OPERATION............................................................... 17
Lighting and Shutdown Instructions.................................... 18
Thermostat Adjustment ........................................................ 21
Burner Flame Check.............................................................. 23
MAINTENANCE............................................................................ 24
TROUBLESHOOTING.................................................................. 26
INSTALLATION DRAWING FOR POTABLE WATER.................. 31
PARTS LIST DRAWING............................................................... 32
PARTS LIST ................................................................................. 33
INSTALLATION INSTRUCTIONS FOR POTABLE WATER AND
SPACE HEATING......................................................................... 34
NOTES.......................................................................................... 35

4
GENERAL INFORMATION
This gas-fired water heater is design certified by CSA International under the
applicable American National Standard, Z21.10.1 or CSA 4.1-(as indicated on
the rating plate), available from CSA International, 8501 East Pleasant Valley
Road, Cleveland, OH U.S.A. 44131-5575.
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 warranty for this water heater is in
effect only when the water heater is installed, adjusted, and operated in
accordance with these Installation and Operating Instructions. The
manufacturer will not be liable for any damage resulting from alteration and/or
failure to comply with these instructions.
This water heater is not design certified for installation in a mobile home.
Such an installation may create a hazardous condition and will nullify the
warranty.
This water heater has been designed and certified for the purpose of heating
potable water. The installation and use of this water heater for any purpose
other than the heating of potable water may cause damage to the water
heater, create a hazardous condition, and nullify the warranty.
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.
CAUTION
Incorrect operation of this appliance may create a hazard to life and
property and will nullify the warranty.
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.
DANGER
Do not store or use gasoline or other flammable, combustible, or
corrosive vapors and liquids in the vicinity of this or any other
appliance.

5
General Information continued-
This water heater has been manufactured for operation at altitudes from sea
level to 2000 feet (610 m) (unless otherwise specified on the water heater
rating plate). For use of this appliance at an elevation greater than 2000 feet
(610 m), contact the dealer or manufacturer listed on the rating plate for
information on any necessary modification. Uncorrected operation of this
appliance may create a hazard to life and property.
Make sure that you check the rating plate and combination gas control on the
water heater to be certain that the type of gas being supplied corresponds with
the marking on the rating plate and combination gas control.
A sacrificial anode is used to extend tank life. Removal of any anode, 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 sacrificial anode and impurities in the water. If this
should happen, an alternative anode(s) 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.
IMPORTANT
Before proceeding, please inspect the water heater and components for
possible damage. DO NOT install any damaged 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.

6
INSTALLATION
LOCATING THE WATER HEATER
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.
Water heaters in residential garages must be installed and located, or
protected, to avoid physical damage. For other installations refer to
local codes. In the absence of local codes, the water heater 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 location of this water heater is of the utmost importance. Before installing
this water heater, read the installation section of these instructions. After
reading these Installation and Operating Instructions, select a location for the
water heater where the floor is level and is easily accessible to gas and water
supply lines. DO NOT locate the water heater where water lines could be
subjected to freezing temperatures. Make sure the cold water pipes are
not located directly above the gas control so that condensate during
humid weather does not drip on the controls.
This water heater MUST be installed indoors out of the wind and
weather.
To comply with NSF requirements this water heater is to be:
a) Sealed to the floor with sealant, in a smooth and easily cleanable
way, or
b) Installed with an optional leg kit that includes legs and/or
extensions that provide a minimum clearance of 6” beneath the
water heater.
WARNING
Water heaters are heat producing appliances. To avoid damage or
injury there shall be no materials stored against the water heater or
vent-air intake system and proper care shall be taken to avoid
unnecessary contact (especially by children) with the water heater and
vent-air intake components. UNDER NO CIRCUMSTANCES SHOULD
FLAMMABLE MATERIALS, SUCH AS GASOLINE OR PAINT
THINNER BE USED OR STORED IN THE VICINITY OF THIS WATER
HEATER, VENT-AIR INTAKE SYSTEM OR IN ANY LOCATION FROM
WHICH FUMES COULD REACH THE WATER HEATER OR VENT-AIR
INTAKE SYSTEM.

7
Installation (Locating The Water Heater) continued-
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 DSA Headquarters Office, 1102 Q Street, Suite 5100,
Sacramento, CA 95811.
Water heater corrosion and component failure can be caused by the heating
and breakdown of airborne chemical vapors. Examples of some typical
compounds that are potentially corrosive are: spray can propellants, cleaning
solvents, refrigerator and air conditioning refrigerants, swimming pool
chemicals, calcium and sodium chloride, waxes and process chemicals.
These materials are corrosive at very low concentration levels with little or no
odor to reveal their presence. NOTE: DAMAGE TO THE WATER HEATER
CAUSED BY EXPOSURE TO CORROSIVE VAPORS IS NOT COVERED BY
THE WARRANTY. DO NOT OPERATE THE WATER HEATER IF
EXPOSURE HAS OR WILL OCCUR. DO NOT STORE ANY POTENTIALLY
CORROSIVE COMPOUNDS IN THE VICINITY OF THE WATER HEATER.
WARNING
Liquefied petroleum gases/propane gases are 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 neighbor’s telephone.
Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
DO NOT OPERATE APPLIANCE UNTIL LEAKAGE IS CORRECTED!

8
Installation (Locating The Water Heater) continued-
Proper venting practices must be considered when selecting a location for this
water heater. For exact venting specifications, please consult the Venting
section of these Installation and Operating Instructions.
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 must have a
minimum length and width of at least 4 inches (10.2 cm) greater than the
diameter of the water heater and must not restrict proper combustion air flow
to 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 ¾ inch (1.9 cm) in diameter and
pitched for proper drainage.
It is recommended that a minimum clearance of 4 inches (10.2 cm) be
provided on the side of the water heater for servicing and maintenance of the
combination temperature and pressure relief valve.
WARNING
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 neighbor’s telephone.
• Gas detectors are available. Contact your gas supplier or
plumbing professional for more information.

9
MINIMUM CLEARANCES
This installation shall allow access to the front of the water heater and
adequate clearance shall be provided for servicing and operating this water
heater. The water heater may be installed on either a combustible or non-
combustible floor. If the water heater is to be installed directly on carpeting, it
shall be installed on top of a metal or wood panel (or equivalent) extending
beyond the full width and depth of the appliance by at least 3 inches (7.6 cm)
in any direction or, if the appliance is to be installed in an alcove or closet, the
entire floor shall be covered by the panel. If the rating plate or the label on
the front of the heater specifies minimum clearances less than those
listed in the below table, the water heater may be installed in accordance
with the minimum clearances listed on the rating plate or the label on the
front of the heater.
If it is necessary to install this water heater in an alcove, use the clearances
listed in Figure 1.
Figure 1
WARNING
Failure to adhere to these installation and operating instructions may
create a hazard to life and property and will nullify the warranty.

10
VENTING
This water heater has been shipped with a draft diverter for which it was
designed with reference to the horizontal and vertical planes. If removed, the
draft diverter must be replaced in the same position and secured to the jacket
top by which it was installed.
WARNING
The venting system must be installed properly following all local codes
or in the absence of local codes, the latest edition of the National Fuel
Gas Code (ANSI Z223.1- latest edition), or in Canada, The Natural Gas
and Propane Installation Code (B149.1-00 latest edition). Failure to
properly install the venting system could result in property damage,
personal injury, or death.
WARNING
Carefully inspect the venting system of a replacement water heater
installation before connecting to the venting system. All joints in the
vent connector must be securely fastened with screws and fit tightly
together. Inspect the venting system for signs of deterioration (rust and
perforation) and replace any sections that are not in good condition.
The chimney must be lined and in good condition. Check to make sure
the venting system is properly sized for the water heater. If the venting
system was previously sized for another gas appliance that has been
removed, the venting system may now be too large. Refer to the latest
edition of the National Fuel Gas Code (ANSI Z223.1-latest edition), or in
Canada, the Natural Gas and Propane Installation Code (B149.1-00
latest edition) for the correct sizing of venting systems and common
venting with another gas appliance.
Do not vent this water heater into the venting system of another gas
applianc designed to vent under positive pressure.
The water heater should be installed as close as practical to the venting
system to minimize the vent connector length required. Refer to local
codes for the distance limitations on vent connector lengths.
At the completion of the water heater installation, the burner and venting
system must be checked for proper operation with all other commonly
vented appliances in operation. Check for spillage of flue products
around the outside relief opening of the draft hood after several minutes
of operation. The flame from a match should be drawn into the draft
hood. Do not use the water heater or connected equipment if spillage is
detected until the problem is corrected. Refer to the latest edition of the
National Fuel Gas Code, or in Canada, the Natural Gas and Propane
Installation Code for complete details on the “Procedure to Be Followed
to Place Equipment in Operation”.