Bradford White M-I-MH40T6FLX User Manual
GAS-FIRED WATER HEATER
A Spanish language version of these instructions is available by
contacting the company listed on the rating plate.
La versión espãnola de estas instrucciones se puede obtener al
escribirle a la fábrica cuyo nombre aparece en la placa de
especificaciones.
INSTALLATION & OPERATION MANUAL
For Flammable Vapor Ignition Resistance
System Equipped Manufactured Home
(Mobile Home) 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.
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, it is
recommended this water heater be installed and serviced by a
plumbing professional.
238-46877-00D REV 06/12
CONGRATULATIONS!
You have just 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 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
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.
neighbor’s phone. Follow the fire department’s instructions.
2
TABLE OF CONTENTS
Page
GENERAL INFORMATION ............................................................ 4
INSTALLATION ............................................................................. 5
Locating The Water Heater .................................................... 5
Minimum Clearances .............................................................. 7
Venting .................................................................................... 8
Combustion Air Supply .......................................................... 9
Water Connections ................................................................. 10
Gas Connections .................................................................... 13
Gas Conversion Instructions ................................................ 14
GENERAL OPERATION ................................................................ 23
Lighting and Shutdown Instructions .................................... 24
Thermostat Adjustment ......................................................... 25
Burner Flame Check............................................................... 27
MAINTENANCE ............................................................................. 27
TYPICAL INSTALLATION ............................................................. 30
PARTS LIST & DRAWING ........................................................... 31
NOTES .......................................................................................... 32
3
GENERAL INFORMATION
This gas-fired water heater is design certified by the CSA International under the
applicable American National Standard, Z21.10.1 or Z21.10.3-(as indicated on the
rating plate) and CSA 4.1-(as indicated on the rating plate).
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 must be
installed in accordance with The Federal Manufactured Home Construction And Safety
Standard Title 24 CRF. part 3280 or CAN/CSA Z240 MH series, mobile home. This
water heater is designed certified for installation in a manufactured home (mobile
home) only and must be installed in an enclosure that will completely separate the
water heater combustion and venting systems from its interior. The water heater
enclosure access door must be on the outside wall of the manufactured home (mobile
home) only. Access to the water heater enclosure from the inside of the manufactured
home (mobile home) is not permitted.
CSA International has tested a representative sample of this water heater design for its
safety of operation. The CSA listing of this water heater includes the field installation of
the following components: roof jack and heater tie down materials. These components
for field installation may have been shipped with this heater and must be installed
according to these instructions. No other components are approved for use with this
water heater.
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.
CAUTION
Incorrect operation of this appliance may create a hazard to life and property
and will nullify the warranty.
Do not use this appliance if any part has been submerged in water. You should contact
the plumbing professional who installed the water heater to inspect the appliance and to
replace any part of the control system including the combination gas control which has
been submerged in water.
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.
4
General Information continued-
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.
This water heater has been manufactured for operation at altitudes from sea level to
2000 feet (610m) (unless otherwise specified on the water heater). For use of this
appliance at an elevation greater than 2000 feet (610m), 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.
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.
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. The removal of this anode, for any
reason, 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 the
impurities in the water. If this should happen, an alternative anode 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.
Locating the Water Heater
INSTALLATION
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 must be taken to avoid unnecessary contact (especially by children)
with the water heater and vent-air intake components. UNDER NO
CIRCUMSTANCES SHALL 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.
5
Installation continued-
DO NOT install the water heater in any location where gasoline or flammable
vapors are likely to be present. This water heater MUST be installed indoors out
of the wind and weather.
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.
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.
For exact venting specifications, please consult the Venting section, located on page 8,
of these Installation and Operating Instructions.
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.
WARNING
Liquefied petroleum gases/propane gas 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!
6
Installation continued-
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.
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, suitable drain pan, adequately drained, must
be installed under the water heater. The drain pan must have a minimum length and
width of at least 4 in. (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 3/4 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.
Minimum Clearances
Failure to adhere to these installation and operating instructions may
create a hazard to life and property and will nullify the warranty.
This installation must allow access to the front of the water heater and adequate
clearance must 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 must 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 must be covered by the panel, increase distances to
provide clearance for servicing.
WARNING
7
Installation continued-
Minimum Clearances From
Combustible Materials
A 0” (0cm) Left, 2” (5.08cm)
Right (113.6 Liters Only)
B 0” (0cm)
C 4” (10.16cm)
D 78” (1.98m) m
VENT ----
Figure 1
Venting
WARNING
The vent system must be installed properly. Failure to properly install the
vent system could result in property damage, personal injury, or death.
Make certain the flue baffle is in place and centered in flue tube. Place the draft
diverter over the flue opening at the top of the water heater by inserting the tips of the
draft diverter legs into the four (4) holes provided in the water heater top. Cut a 7 1/4
inch (18.5cm) diameter hole in the ceiling and roof directly above the flue of the water
heater. Center the water heater beneath the 7 1/4 inch (18.5cm) diameter holes in the
roof and ceiling for proper alignment of the draft diverter and roof jack vent. Apply nonhardening mastic on the roof, around the previously cut hole, to form a weather seal
with the flashing of the gas vent roof jack assembly. Insert gas vent roof jack assembly
from above and fasten the flashing to the roof through the pre-punched holes in the
flashing. Note: Only the roof jacks listed in Figure 2 can be used on this water
heater. Apply additional non-hardening mastic to complete the weather seal. Slip the
3inch (7.62cm) vent connector extension that is shipped telescoped, into the gas vent
roof jack assembly down onto the draft diverter that is secured to the top of the water
heater and fasten with the two (2) sheet metal screws provided.
8
TYPICAL INSTALLATION (VENTING)
Figure 2
Combustion Air Supply
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!
The flow of combustion and ventilating air must not be obstructed.
WARNING
IMPORTANT
9
Combustion Air Supply continued-
All combustion air must be supplied from outdoors by one of the following
installation methods and as illustrated in Figure 2. The flow of combustion
and ventilating air must not be obstructed. Adequate air must be supplied for
combustion and ventilation. An insufficient supply of air will cause
recirculation of combustion products resulting in air contamination that may be
hazardous to life. Such a condition often will result in a yellow, luminous
burner flame, causing carboning or sooting of the combustion chamber,
burners and flue tubes with possible damage to the heater.
A minimum 34 in2 (86.4cm2) opening area is required to supply fresh air to the
water heater for combustion. Cut a 4” x 8 1/2” (10.2cm x 21.6cm) rectangular
opening in the outside access door panel with the bottom side of the opening
being 6” (15.3cm) from the bottom access door panel. A protective cover for
this fresh air opening is suggested to resist the entrance of rodents.
WARNING
Be sure protective cover still allows adequate fresh air opening area.
The water heater is to be secured in place using the supplied sheet metal
strapping and screws. Fasten the base of the water heater to the floor using
the screws provided. The perforated metal strapping must be fastened to the
top of the water heater and to the adjacent walls with the screws provided
(See Figure 2).
Water Connections
NOTE: BEFORE PROCEEDING WITH THE INSTALLATION, CLOSE THE
MAIN WATER SUPPLY VALVE.
After shutting off the main water supply, open a faucet to relieve the water line
pressure to prevent any water from leaking out of the pipes while making the
water connections to the water heater. After the pressure has been relieved,
close the faucet. The COLD water inlet is identified on the side of the water
heater and HOT water outlet is identified on the top of the water heater. The
fittings at the cold water inlet and hot water outlet are dielectric waterway
fittings with 3/4” NPT male thread. Make the proper plumbing connections
between the water heater and the plumbing system to the house. Install a
shut-off valve in the cold water supply line.
CAUTION
If sweat fittings are to be use, DO NOT apply heat to the nipples on the
water heater. Sweat the tubing to the adapter before fitting the adapter to
the water connections. It is imperative that heat is not applied to the
nipples containing a plastic liner.
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