Bradford White BRADFORD WHITE EVERHOT TG-150I-N(X) Service manual

238-48022-00D 7/11
Bradford White EverHotTankless Gas Water Heater
For Interior Installation
TG-150I-N(X), TG-180I-N(X), TG-199I-N(X), TG237I-N(X) & TG-237I-N(X)A
INSTALLATION AND OPERATION INSTRUCTION MANUAL
With Troubleshooting Guide
PLACE THESE INSTRUCTIONS ADJACENT TO WATER HEATER AND NOTIFY OWNER TO 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.
Installation and service must be performed by a
qualified installer, service agency, or gas supplier.
WARNING: If the information in these
instructions is not followed exactly, a fire or
explosion may result causing property
damage, personal injury or death
Ambler, PA 19002
Tech. Service [phone]
Service Part [phone]
Warranty Service [phone]
A Spanish language version of these instructions is available by
contacting Bradford White.
La versión espãnola de estas instrucciones se puede obtener al
escribirle a la fábrica cuyo nombre aparece en la placa de.

2
SECTION I: IMPORTANT INFORMATION
TABLE OF CONTENTS
I IMPORTANT INFORMATION ......... 2 VII ELECTRICAL CONNECTIONS ... 49
II SPECIFICATIONS .......................... 6 VIII OPERATING INSTRUCTIONS.... 60
III INSTALLATION
INSTRUCTIONS ............................. 9
TEMPERATURE
ADJUSTMENT............................. 62
IV WATER CONNECTIONS.............. 13 IX MAINTENANCE........................... 68
V VENTING ...................................... 22 X PARTS LIST ................................ 72
VI GAS CONNECTIONS ................... 46 XI WARRANTY ................................ 88
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
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.
NOTICE

3
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.
Failure to properly install the vent and air intake (if applicable) system could result in property
damage, personal injury, or death.
DO NOT install any damaged venting system components. If damage is evident, please
contact the supplier where the water heater was purchased or the venting manufacturer.
Use only 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 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.
DANGER
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, maintaining or servicing
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 pressure relief valve is installed into the proper location
in the hot water outlet piping 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 NOT suitable for installation on combustible flooring. Install water heater
exactly as shown in this manual.
DO NOT operate this water heater without first being certain it is filled with water.
WARNING

4
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 technician to inspect the water heater and to replace any part of the control
system including gas controls, which 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, bodily 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 nor attempt to disconnect any components of this water heater without positively
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.
This water heater is for indoor installation only. A venting system must be used to supply
outdoor air for combustion to the water heater.
This water heater requires its own separate venting system. DO NOT connect the exhaust
vent into an existing vent pipe or chimney.
Water heater materials of construction, products of combustion and the fuel contain carbon
monoxide, nitrogen oxides, aldehydes and/or other toxic or harmful substances which can
cause death or serious injury and which are known to the state of California to cause cancer,
birth defects and other reproductive harm. Always use proper safety clothing, respirators and
equipment when servicing or working nearby this water heater.
WARNING

5
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
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
must not be stored or used in the same room with this water heater.
DO NOT USE AN INSULATION BLANKET WITH 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.
WARNING

6
SECTION II: SPECIFICATIONS
Table 1. Specifications.
* Minimum flow may vary slightly depending on the temperature setting and the inlet water temperature.
** For commercial and hydronic applications requiring higher temperatures. Requires the use of an optional controller
(P/N 239-47805-00).
Bradford White Corporation is continually updating and improving products. Therefore, specifications are subject to
change without prior notice.
The maximum inlet gas pressure must not exceed the value specified by the manufacturer. The minimum value
listed is for the purpose of input adjustment.
Model TG-150I-N(X) TG-180I-N(X) TG-199I-N(X) TG-237I-N(X) TG-237I-N(X)A
Minimum Rate Btu/h 15,000 19,000
Maximum Rate Btu/h 150,000 180,000
199,000 Natural
Gas
190,000
Propane
237,000
Flow Rate (Min-Max) *
0.6-5.0 GPM
(2.3-18.9
L/min)
0.6-7.5 GPM
(2.3-28.4 L/min)
0.6-9.4 GPM
(2.3-35.5 L/min)
0.6-9.8 GPM
(2.3-37 L/min)
Flow Rate (45F rise) 5.0 GPM
(18.9 L/min)
6.7 GPM
(25.4 L/min)
7.1 GPM
(27.0 L/min)
8.5 GPM
(32.2 L/min)
Default Temperature Setting 104°F (40°C)
Maximum Temp Setting (commercial **) 160°F (71°C) 180°F (82°C) 185°F (85°C)
Maximum Temp Setting (residential) 120°F (49°C)
Minimum Temperature Setting 96°F (36°C) 98°F (37°C)
Weight 50 lb (23 kg) 55 lb (25 kg)
Energy Factor 0.82 0.82 0.82 N/A
Thermal Efficiency 84%
Noise level (inside rating) 49 dB
Electrical
Consumption
Normal 53 W 65 W 79 W 99 W
Standby 2 W
Anti-frost
Protection 100 W 100 W 116 W
By-Pass Control Fixed Electronic
Minimum Gas Supply
Pressure
Natural Gas 5.0 inch W.C.
Propane 8.0 inch W.C.
Maximum Gas Supply
Pressure
Natural Gas 10.5 inch W.C.
Propane 13.5 inch W.C.
Type of Appliance Direct Vent, Temperature controlled continuous flow gas water heater
Operation With or without remote controls, mounted in kitchen, bathroom, etc.
Approved Gas Type Natural Gas or Propane-Ensure unit matches gas type supplied at the installation location.
Connections Gas Supply: 3/4" MNPT, Cold Water Inlet: 3/4" MNPT, Hot Water Outlet: 3/4" MNPT
Ignition System Direct Spark Ignition
Electric Connections Water Heater: AC 120 Volts, 60Hz. Remote Control: DC 12 Volts (Digital)
Water Temperature Control Simulation Feedforward and Feedback
Minimum Water Supply Pressure 20 PSI (Recommended 30-80 PSI for maximum performance)
Maximum Water Supply Pressure 150 PSI
Remote Control Cable Non-Polarized Two Core Cable (Minimum 22 AWG)
ENERGY STAR®Qualified Yes (Both U.S. and Canada) No

7
Dimensions
Table 2. Water Heater Dimensions (Approx.).
DIM DESCRIPTION
TG-150I-N(X)
TG-180I-N(X)
TG-199I-N(X)
in. (mm)
TG-237I-N(X)
TG-237I-N(X)A
in. (mm)
A Width 14 (355.6) 18 1/2 (470)
B Depth * 9 5/8 (244.5) 9 1/8 (230.5)
C Height - Unit 22 7/8 (582) 23 5/8 (600)
D Height - with brackets 25 1/2 (648.2) 25 1/8 (639.8)
E Hot Water Outlet - from wall * 3 5/8 (91) 4 3/8 (110)
F Hot Water Outlet - from center 4 3/8 (110) 2 3/8 (61)
G Cold Water Inlet - from wall * 2 7/8 (70) 3 3/4 (94)
H Cold Water Inlet - from center 1 1/8 (27) 2 (52)
I Gas Connection - from wall * 4 3/8 (109) 2 1/8 (56.2)
J Gas Connection - from center 3 1/2 (89) 4 3/8 (110)
K
From base to gas connection 1 5/8 (40) 1 5/8 (40)
From base to cold connection 2 (50) 2 (50)
From base to hot connection 1 5/8 (41) 1 5/8 (41)
L Air intake to exhaust n/a 6 (152.4)
* This is the minimum dimension from the wall. The wall bracket is adjustable to allow an additional 1 5/8 in. (40 mm).
TG-150I-N(X), TG-180I-N(X), TG-199I-N(X) TG-237I-N(X), TG-237I-N(X)A

8
Figure 1. Graph Showing Pressure Drop v. Water Flow Rate.
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
0 25 50 75 100 125 150
Figure 2. Graph Showing Water Flow Rate v. Temperature Rise.
TG-150I-N(X) TG-237I-N(X)
TG-237I-N(X)A
TG-199I-N(X)TG-180I-N(X)
Pressure Drop (psi)
Water Flow Rate (gpm)
Pressure Loss (ft head)
TG-237I-N(X & TG-237I-N(X)A
TG-199I-N(X)
TG-180I-N(X)
TG-150I-N(X)
Water Flow Rate (gpm)
Temperature Rise (°F)

9
SECTION III: INSTALLATION INSTRUCTIONS
CAUTION
If building cold water supply has a back-flow preventer, check valve or water meter with check valve,
provisions for thermal expansion of water in the hot water system must be provided.
WARNING
Pressure relief valve discharge piping must be piped near floor to eliminate potential of severe
burns. Do not pipe in any area where freezing could occur. Do not install any shut-off valves, plugs
or caps to the temperature and pressure relief valve or piping.
WARNING
This water heater must be located in an area where leakage of the heat exchanger coil, water line
connections, or the 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 length and width of at least four (4) inches (10.2 cm)
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 ¾ inch (1.9 cm) in diameter and pitched for proper drainage.
WARNING
INSTALLATION OF THIS WATER HEATER REQUIRES ABILITY EQUIVALENT TO THAT OF A
LICENSED PLUMBER. 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!

10
WARNING
UNPACKING
INSPECT SHIPMENT carefully for any signs of damage.
1. All equipment is carefully manufactured, inspected and packed.
2. Any claims for damage or shortage in shipment must be filed immediately with Bradford White
Corporation and noted on the Bill of Lading.
WATER HEATER LOCATION
1. The TG series water heaters may be vented either horizontally through an outside wall or
vertically through the roof using the venting components designed for this water heater. Contact
your Bradford White supplier or those suggested in this manual to order the required venting
components. The venting system should be as short as possible. Refer to the Venting System
Installation section of this Installation and Operation Instruction Manual for the vent terminal
location restrictions before choosing a final location for the water heater.
2. The water heater must be installed on a wall capable of supporting at least 55 pounds (25 kg).
Locate the water heater at a height convenient for servicing and above the reach of small
children.
3. Refer to Table for minimum clearances to combustibles.
4. If the water heater is installed in a confined space, such as a closet, ventilation air must be
provided to prevent increased room temperature. Excessive ambient temperatures surrounding
the water heater may shorten the life of the controls.
REMOVE CARTON
Move water heater to a location near where it will be installed. Carefully slide water heater out from the
carton and remove all the contents.
DANGER
Temperature setting should not exceed safe temperature at fixtures. See water temperature control
warning in the “Temperature Adjustment” section of this Installation and Operation Instruction
Manual. If higher preheat temperatures are necessary to obtain adequate booster output, add an
ASSE approved mixing valve for hot water supplied to fixtures.
WARNING
Residential use water heaters are suitable for potable water heating only. DO NOT use a
residential use water heater for space heating or combination space heating/domestic water
heating. Commercial use water heaters may be used for space heating or combination space
heating/domestic water heating. Refer to the instructions for space heating in this Installation
and Operation Instruction Manual.
This water heater is not suitable for use in pool or spa applications.
The water heater must be installed indoors using the proper venting system components for
combustion air supply and discharging flue products to the outdoors. Contact the supplier of
this water heater or Bradford White for venting components.
DO NOT operate this water heater without the vent piping connected.
All pipe joints should be taped to help prevent leakage around joints.

11
MOUNT WATER HEATER ON THE WALL
Determine the proper height and location for the water heater to be installed. Consider the venting
system, as well as the water and gas connections. Allow enough room for servicing the water heater and
maintain the clearances from combustible materials. The water heater is supported on the wall by means
of a top and bottom slotted angle bracket. For convenience, the center hole of the bracket is slotted so
that a center screw may be first installed in the wall for hanging the water heater on the wall. Two more
screws are then added on the ends of the bracket to secure the water heater. Wall anchors should be
used for the bracket holes unless the bracket lines up with a stud. As an alternative, a suitable piece of
plywood may be cut to span the wall studs and the brackets fastened to the plywood. Make sure the
anchors are rated to support the 55 pound (25 kg) weight of the water heater.
Table 3. Water Heater Clearances.
*4 inches (102 mm) for enclosed area; 1 inch (26 mm) for unenclosed area
to Combustibles to Non-Combustibles
TG-150I-N(X)
TG-180I-N(X)
TG-199I-N(X)
TG-237I-N(X)
TG-237I-N(X)A
TG-150I-N(X)
TG-180I-N(X)
TG-199I-N(X)
TG-237I-N(X)A
TG-237I-N(X)A
Top of
Water
Heater
6 inches
(152 mm)
12 inches
(305 mm)
2 inches
(51 mm)
2 inches
(51 mm)
Back of
Water
Heater
0 (zero) 0 (zero) 0 (zero) 0 (zero)
Front of
Water
Heater
6 inches
(152 mm)
24 inches
(610 mm)
6 inches
(152 mm)
24 inches
(610 mm)
Sides of
Water
Heater
2 inches
(51 mm)
2 inches (51
mm)
1/2 inch
(13 mm)
1/2 inch
(13 mm)
Floor/
Ground
12 inches
(305 mm)
12 inches
(305 mm)
12 inches (305
mm)
2 inches
(51 mm)
Vent 0 (zero) 4 inches * 0 (zero) 0 (zero)
WARNING
For all closet installations, follow the minimum clearances to combustibles whether the closet door is
combustible or non-combustible.
The recommended minimum clearance for servicing is 24 inches (608 mm) in front of the water
heater.
NOTICE

12
State Regulations
NOTICE BEFORE INSTALLATION
Bradford White direct-vent appliance must be installed by a state qualified or licensed contractor. If you
are not properly trained, you must not install this unit.
IMPORTANT: In the State of Massachusetts (248CMR 4.00 & 5.00)
For all side wall horizontally vented gas fueled equipment installed in every dwelling, building or
structure used in whole or in part for residential purposes, including those owned or operated by the
Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above
finished grade in the area of venting, including but not limited to decks and porches, the following
requirements must be satisfied:
1. INSTALLATION OF CARBON MONOXIDE DETECTORS. At the time of installation of the side
wall horizontal vented gas fueled equipment, the installing plumber or gas fitter must observe that
a hard wired carbon monoxide detector with an alarm and battery back-up is installed on the floor
level where the gas equipment is to be installed. In addition, the installing plumber or gasfitter
must observe that a battery operated or hard wired carbon monoxide detector with an alarm is
installed on each additional level of the dwelling, building or structure served by the property
owner to secure the services of qualified licensed professionals for the installation of hard wired
carbon monoxide detectors. It is the responsibility of the property owner to secure the services of
qualified licensed professionals for the installation of hard wired carbon monoxide detectors.
a. In the event that the side wall horizontally vented gas fueled equipment is installed in a
crawl space or an attic, the hard wired carbon monoxide detector with alarm and battery
back-up may be installed on the next adjacent floor level.
b. In the event that the requirements of this subdivision cannot be met at the time of
completion of installation, the owner shall have a period of thirty (30) days to comply with
the above requirements; provided, however, that during said thirty (30) day period, a
battery operated carbon monoxide detector with an alarm must be installed.
2. APPROVED CARBON MONOXIDE DETECTORS. Each carbon monoxide detector as required
in accordance with the above provisions shall comply with NFPA 720 and be ANSI/UL 2034 listed
and IAS certified.
3. SIGNAGE. A metal or plastic identification plate must be permanently mounted to the exterior of
the building at a minimum height of eight (8) feet above grade directly in line with the exhaust
vent terminal for the horizontally vented gas fueled heating appliance or equipment. The sign
must read, in print size no less than one-half (1/2) inch in size, “GAS VENT DIRECTLY BELOW.
KEEP CLEAR OF ALL OBSTRUCTIONS”.
4. INSPECTION. The state or local gas inspector of the side wall horizontally vented gas fueled
equipment shall not approve the installation unless, upon inspection, the inspector observes
carbon monoxide detectors and signage installed in accordance with the provisions of 248 CMR
5308(2)(a)1 through 4.

13
SECTION IV: WATER CONNECTIONS
WARNING
Failure to install and maintain a new, listed pressure relief valve will release the manufacturer from
any claim, which might result from excessive temperature and pressures.
Keep clear of the pressure relief valve discharge line outlet. The discharge may be hot enough to
cause scald injury. The water is under pressure and may splash.
WARNING
DO NOT reverse the inlet and outlet (cold and hot water) connections on the water heater. This may
cause a hazardous operating condition or the water heater may be inoperable
WATER QUALITY
The EverHotwater heater must have the water quality within the following limits for long life and reliable
operation. The water supply should be tested to make sure the quality is within the specified limits. If
there is a problem with the water quality, contact your local water conditioning company for equipment to
condition the water supply to this water heater.
NOTICE
Operating this water heater with water conditions outside the specified limits will void the warranty.
Table 4. Maximum Levels for Water Quality.
Description pH
TDS
(Total
Dissolved
Solids)
Total
Hardness Aluminum Chlorides Copper Iron Manganese Zinc
Maximum
Levels 6.5 to
8.5
Up to 500
ppm
Up to
11.7
grains
Up to 0.2
ppm
Up to
250 ppm
Up to
1.0 ppm
Up to
0.3
ppm
Up to 0.05
ppm
Up to 5
ppm
Note: 1 ppm = 1 mg/L
NOTICE
If the EverHot water heater is operated under hard water conditions without a water conditioner, the
diagnostic code “LC” may flash on the water heater’s control. This code means the heat exchanger coil
is beginning to accumulate mineral deposits and MUST be flushed (see Section IX, “Flushing Procedure
for Mineral Scale Removal…”). Contact your installer for a qualified service technician to flush the heat
exchanger. A water conditioner may be needed to prevent this condition from re-occurring.
CAUTION
Failure to flush the water heater when “LC” is flashing will cause damage to the heat exchanger.
Damage caused by mineral scale build up is not covered by the water heater warranty.
INSTRUCTIONS FOR CONNECTIONS
1. 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. The COLD water inlet and HOT water outlet are identified on the bottom casing of
the water heater. Make the proper plumbing connections between the water heater and the
plumbing system to the house. All soldering materials and piping must be compatible with

14
potable water. Unions should be installed on both the hot and cold water lines for future servicing
and disconnection of the water heater. Install a shut-off valve in the cold water supply line.
2. In order to service the water heater in the event the heat exchanger needs to be flushed of
mineral deposits, tee fittings with shut-off valves and service connections to hoses should be
installed. Also, install a shut-off valve to the hot water supply to isolate the service tee fittings. A
plumbing installation kit, which includes these fittings and a pressure relief valve, is available from
your supplier. Refer to the piping diagrams in Section IV, “Water Connections.”
3. Install a pressure relief valve on a tee connection from the hot water outlet piping from the water
heater. Refer to the piping diagrams (Figure and Figure ) and pressure relief valve warning in
Section IV, “Water Connections.”
4. In cold climates, where piping can freeze during an extended power failure, drain solenoid valves
should be installed on the cold and hot water supply lines to allow water to drain from the water
heater when power is interrupted. Refer to the piping diagram (Figure ) “Recommended Piping
for Power Failure Freeze Protection” in Section IV, and contact your Bradford White dealer if
assistance is needed.
5. If this water heater is installed in a closed water supply system, such as the one having a back-
flow preventer in the cold water supply, provisions must be made to control thermal expansion.
DO NOT operate this water heater in a closed system without provisions for controlling thermal
expansion. Warranties do not cover damages from thermal expansions, such as pressure bulges
and/or deformities. Your water supplier or local plumbing inspector should be contacted on how
to control this situation.
6. Purge the cold water line prior to connecting to the water heater to remove debris. Debris will
clog the mesh strainer of the inlet filter. The inlet strainer prevents debris from damaging the flow
sensor or clogging the coil. It may need to be cleaned periodically and should be cleaned after
the initial operation. DO NOT operate the water heater without the filter in place. In areas where
sediment may be periodically present in the water supply, a Y-type strainer (#20 mesh) or
cartridge filter should be installed on the cold water inlet to the water heater to prevent the water
heater fine mesh strainer from getting plugged and restricting water flow.
7. After installation of the water lines, open the main water supply valve and fill the water heater.
While the water heater is filling, open several hot water faucets to allow air to escape from the
water system. When a steady stream of water flows through the faucets, close them and check
all water connections for possible leaks.
8. This water heater may also be connected to a circulating pump or storage tank for increased flow
capacity during high demand periods.
9. Commercial installations may require more than one water heater piped together in a manifold to
supply enough capacity for high temperature and high water flow applications. Special controls
are available from your Bradford White supplier for operating more than one water heater
together. These controls stage the operation of the water heaters for the flow rates and control
the amount of flow through each water heater. Order p/n MSA-2M for the electronic manifold
control for the first and second water heater and p/n MSA-2S for the wiring harness for each
additional water heater to be controlled. A maximum of (5) water heaters can be connected
together. Alternatively, to connect only (2) water heaters, an EZConnectTM harness, p/n REU-
EZC-1US, can be used. Instructions are included with these parts.
NOTICE
Take care when using pipe dope or thread sealing tape to avoid clogging the inlet screen and water
flow sensor. Wipe off excess pipe dope from threads before connecting to the water heater.
Commercial dishwashers will require either more than one water heater, or a storage tank to supply a
sufficient volume of hot water.

15
Figure 3. Scald Warning.
Table 5. Approximate scald time/temperatures.
APPROXIMATE TIME/TEMPERATURE
RELATIONSHIPS IN SCALDS
120°F (49C) More than 5 minutes
125°F (52C) 1½ to 2 minutes
130°F (54C) About 30 seconds
135°F (57C) About 10 seconds
140°F (60C) Less than 5 seconds
145°F (63C) Less than 3 seconds
150°F (66C) About 1½ seconds
155°F (68C) About 1 second

16
Figure 4. Recommended Piping for a Basic Installation.

17
Figure 5. Recommended Piping for a Circulation Systems.

18
Recommended Piping for Power Failure Freeze Protection
As long as electrical power and gas are supplied to the EverHotwater heater, freeze protection is
provided to the heat exchanger and piping inside the water heater with ambient temperatures as cold as
-30F (-34C), when protected from direct wind exposure. In the event of a power failure with ambient
temperatures below freezing, the water heater must be drained of all water to prevent freeze damage.
The water heater may be drained manually, or automatically, through the installation of the optional
solenoid valves, as shown in the following illustration. The drain solenoids are recommended for very
cold climates to prevent water heater freeze damage where power failures from ice and windstorms
occur.
The electrical connections for the two solenoids must be tied to the 120 volt main power supply (black
and white wires). When the electrical power to the water heater fails, the ¾” solenoid on the cold water
inlet pipe closes, stopping water flow into the water heater. The drain solenoid opens, allowing the water
heater and connected piping to drain. Make sure the piping from the drain solenoid is run to a suitable
drain or outside the building to prevent water damage.
CAUTION
Heat trace all water pipe and fittings located outside the home (attic, crawl space) or building
structure. All pipe and fittings shown below dashed line (see Figure ) should be located inside home
or building structure. The vacuum breaker line should be located inside the building structure.
Figure 6. Recommended Piping for Freeze Protection.

19
PRESSURE RELIEF VALVE
Keep clear of the 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 pressure, install pressure protective equipment required by
local codes, but not less than a 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 pressure relief valve must be marked with a maximum set pressure not to exceed the
maximum working pressure of the water heater. The pressure relief valve rating must not be
less than the hourly rating of the water heater.
Install the pressure relief valve into a tee connection from the hot water outlet of the water
heater.
Note: Some models may already be equipped or supplied with an installed pressure relief
valve. Verify that the pressure relief valve complies with local codes. If the pressure relief
valve does not comply with local codes, replace it with one that does. Follow the installation
instructions in the following paragraph.
Install a discharge line so that water discharged from the pressure relief valve will exit within
six (6) inches (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. 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 four (4) inches (10.2
cm) be provided on the side of the water heater for servicing and maintenance of the
pressure relief valve.
DO NOT place a valve between the pressure relief valve and the hot water outlet!
WARNING

20
Combination Water and Space Heating Applications – Commercial Use Water Heaters Only
Commercial use water heaters may be used for space heating or combination space heating/potable water
heating applications, provided the following requirements and recommended piping diagrams are carefully
followed.
WARNING
The following instructions must be carefully followed to assure safe and reliable operation of the
water heater. All piping components connected to this water heater must be suitable for use with
potable water. In Massachusetts, space heating piping length must not exceed 50 feet. Toxic
chemicals, such as those used for boiler treatment, must not be introduced into potable water used
for space heating. This water heater must not be connected to an existing heating system or
component(s) previously used with a non-potable water heating appliance. When the system
requires water for space heating at temperatures higher than required for other means, an ASSE
approved mixing valve must be installed to temper the water for those uses in order to reduce the
scald hazard potential.
1. Only commercial use water heaters may be used for combination water heating/space heating
applications. Residential use water heaters will not be covered under warranty for water heating/space
heating applications.
2. The temperature setting of the water heater thermostat must not exceed 160F.
3. In combination space heating/potable water heating applications that require higher water temperatures
than normally used for potable water uses, an ASSE approved thermostatic mixing valve must be
installed to temper the water for those uses in order to reduce the scald hazard potential.
4. In order to assure adequate flow through the water heater, follow the recommended piping diagram and
circulator specifications (see Figure ).
5. An expansion tank will be required in all space heating applications.
6. A Y-type mesh strainer (#20 mesh screen) should be installed on the cold water inlet of the water heater
to prevent clogging of the fine mesh screen on the water heater cold water inlet connection.
7. A water softener must be used if the water supply has a tested hardness level above 10 grains of
hardness.
8. All piping must be ¾” copper or larger.
9. All components must be suitable for use with potable water.
10. The water heater should be located as close as practical to the space heating heat exchanger.
11. A check valve should be located after the circulator(s) to prevent backflow during potable water demands.
12. A heat exchanger may be required to separate the potable water from the space heating circuit in certain
applications.