Bradford White RG1D Installation instructions

238-51004-00A REV 11/14
DAMPER EQUIPPED
GAS WATER HEATER
A Spanish language version of these instructions is available by contacting
the company listed on the rating plate.
La version espanola de estas instrucciones se puede obtener al escribirle
a la fabrica 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 to be installed and serviced by a plumbing professional.
INSTALLATION & OPERATION INSTRUCTION
MANUAL For Flammable Vapor Ignition Resistant
System Equipped Water Heater
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.
WARNING: If the information in these instructions is not followed
exactly, a fire or explosion may result causing property damage,
personal injury or death.

2
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 Damper Equipped
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.
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/Intelligent Diagnostic Control to prevent
burner/pilot operation with restricted airflow
Flammable Vapor Sensor
Automatic Ignition Device
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
Electrical Connections...................................................................17
Wiring Diagram...............................................................................18
GENERAL OPERATION.....................................................................20
Lighting and Shutdown Instructions............................................21
Thermostat Adjustments ...............................................................21
Burner Flame Check ......................................................................23
MAINTENANCE ..................................................................................25
TROUBLESHOOTING ........................................................................29
INSTALLATION INSTRUCTIONS FOR POTABLE WATER .............34
PARTS LIST........................................................................................35
INSTALLATION INSTRUCTIONS FOR POTABLE WATER AND
SPACE HEATING ...............................................................................39
NOTES ................................................................................................40

4
GENERAL INFORMATION
This gas-fired water heater is design certified by CSA International under the
applicable American National Standard, Z21.10.1-Latest Edition or CSA 4.1-
Latest Edition, available from CSA International, 8501 East Pleasant Valley
Road, Cleveland, OH 44131-5575, USA.
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, Natural Gas
Installation Code, CAN/CGA B149.1-Latest Edition, or Propane Installation
Code, CAN/CGA B149.2-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 void 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 void the warranty.
CAUTION
Incorrect operation of this water heater may create a hazard to life and
property and will void 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.
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.
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-
IMPORTANT
Before proceeding, please inspect the water heater and components for
possible damage. DO NOT install any damaged components. If damage
is evident, please contact the supplier where the water heater was
purchased or the manufacturer listed on the rating plate for replacement
parts.
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 water heater at an elevation greater than 2000
feet (610 m), contact the dealer or manufacturer listed on the rating plate for
information on any necessary modifications. Uncorrected operation of this
water heater 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. The removal of this anode, for
any reason, will void 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.

6
INSTALLATION
Locating the Water Heater
WARNING
Water heaters are heat producing appliances. To avoid damage or injury,
there must 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.
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, Natural Gas Installation Code, CAN/CGA B149.1-Latest Edition, or
Propane Installation Code, CAN/CGA B149.2-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 Operation 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.

7
Installation (Locating the Water Heater) continued-
Note: For California installations, 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, California
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 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 touch any electrical 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-
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.
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 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 in. (1.9 cm) in diameter and pitched for proper
drainage.
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.

9
Minimum Clearances
WARNING
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 water heater by at least 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. 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 must be installed in accordance with the
minimum clearances listed on the rating plate or the label on the front of the
heater. Increase distances to provide clearance for servicing.
If it is necessary to install this water heater in an alcove, use the clearances
listed in Figure 1.
Figure 1. Minimum Clearances for an Alcove Installation.

10
Venting
WARNING
The venting system must be installed properly following all local codes or
in the absence of local codes, the National Fuel Gas Code, ANSI Z223.1-
Latest Edition, or in Canada, The Natural Gas and Propane Installation
Code, B149-Latest Edition. Failure to properly install the venting system
could result in property damage, personal injury, or death.
This water heater has been shipped with a draft hood, also called a draft
diverter, for which it was designed. The water heater must be operated with
this draft hood properly installed on the damper bracket. If ever removed, the
draft hood must be replaced in the same position and properly secured.
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 National Fuel Gas Code
ANSI Z223.1-Latest Edition, or in Canada, the Natural Gas and Propane
Installation Code, B149-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
appliance 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.”

11
Venting continued-
This water heater must be connected to a lined masonry chimney or venting
system approved by local codes or ordinances. The vent connector used to
attach the draft hood outlet to the chimney or approved vent must be of the
same diameter as the draft hood outlet or larger. For proper venting in certain
installations, a larger vent connector may be needed. Consult venting tables
in the National Fuel Gas Code (ANSI Z223.1-Latest Edition), and the Natural
Gas and Propane Installation Codes, CAN/CGA (B149.1 or B149.2-Latest
Editions) or local code officials for proper application for your area.
Combustion Air Supply
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 water heater 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!
Provide adequate air 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
water heater.
When an exhaust fan is installed in the same room with a heater, sufficient
openings for air must be provided in the walls. Undersized openings will
cause air to be drawn into the room through the chimney, causing recirculation
of combustion products.
WARNING
The flow of combustion and ventilating air must not be obstructed.
Do not block or in any way restrict jacket air inlet slots located at the
bottom front of the water heater.

12
Combustion Air Supply continued-
Confined Spaces
Confined spaces are spaces defined as having less than 50 ft3of space per
1,000 BTU (1.41 m3/.29 kw) per hour of input.
Unconfined Spaces
In unconfined spaces in buildings, infiltration may be adequate to provide air
for combustion, ventilation, and dilution of flue gases. However, in buildings of
tight construction (for example, weather stripping, heavily insulated, caulked,
vapor barrier, etc.), additional air may need to be provided using the methods
described below.
All Air from Inside the Building: The confined space must be provided with
two permanent openings communicating directly with an additional room(s) of
sufficient volume, so that the combined volume of all spaces meets the criteria
for an unconfined space. The total input of all gas utilization equipment
installed in the combined space must be considered in making this
determination. Each opening must have a minimum free area of 1 square
inch per 1,000 BTU (6.45 cm2/.29 kw) per hour of the total input rating of all
gas utilization equipment in the confined space, but not less than 100 square
inches (645 cm2). One opening must be within 12 in. (31 cm) of the top and
one within 12 in. (31 cm) of the bottom of the enclosure.
All Air from Outdoors: The confined space must be provided with two
permanent openings, one commencing within 12 in. (31 cm) of the top and
one commencing within 12 in. (31 cm) from the bottom of the enclosure. The
openings must communicate directly, or by ducts, with the outdoors or spaces
(crawl or attic) that freely communicate with the outdoors.
1. When directly communicating with the outdoors, each opening must have
a minimum free area of 1 square inch per 4,000 BTU (6.45 cm2/1.2 kw)
per hour of total input rating of all equipment in the enclosure.
2. When communicating with the outdoors through vertical ducts, each
opening must have a minimum free area of 1 square inch per 4,000 BTU
(6.45 cm2/1.2 kw) per hour of total input rating of all equipment in the
enclosure.
3. When communicating with the outdoors through horizontal ducts, each
opening must have a minimum free area of 1 square inch per 2,000 BTU
(6.45 cm2/.6 kw) per hour of total input rating of all equipment in the
enclosure.
4. When ducts are used, they must be of the same cross-sectional area as
the free area of the openings to which they connect. The minimum
dimension of rectangular air ducts must be not less than 3 in. (7.5 cm).
Specially Engineered Installations
The requirements noted under CONFINED SPACES above shall not
necessarily govern when special engineering, approved by the authority
having jurisdiction, provides an adequate supply of air for combustion,
ventilation, and dilution of flue gases.

13
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 and HOT water outlet are 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.
WARNING
If sweat fittings are to be used, DO NOT apply heat to the nipples on top of
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.
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. Your
water supplier or local plumbing inspector should be contacted on how to
control this situation.
WARNING
FAILURE TO INSTALL AND MAINTAIN A NEW, LISTED 3/4” X 3/4”
TEMPERATURE AND PRESSURE RELIEF VALVE WILL RELEASE THE
MANUFACTURER FROM ANY CLAIM, WHICH MIGHT RESULT FROM
EXCESSIVE TEMPERATURE AND PRESSURES.
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. NEVER OPERATE THE WATER HEATER
WITHOUT FIRST BEING CERTAIN IT IS FILLED WITH WATER.

14
Installation (Water Connections) continued-
WARNING
For protection against excessive temperatures and pressure, install
temperature and pressure protective equipment required by local codes,
but 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 or the Standard CAN1-4.4. Temperature and Pressure 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 not to exceed the maximum working pressure of the water
heater. The combination temperature and pressure relief valve must
also have an hourly rated temperature steam BTU discharge capacity
not 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 a
combination temperature and pressure relief valve. Verify that the
combination temperature and pressure relief valve complies 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. 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.

15
Installation (Water Connections) continued-
WARNING
Hydrogen gas can be produced in an operating water heater that has not
had water drawn from the tank for a long period of time (generally two
weeks or more). Hydrogen gas is extremely flammable. To prevent the
possibility of injury under these conditions, we recommend the hot water
faucet to be open for several minutes at the kitchen sink before you use
any electrical appliance, which is connected to the hot water system. If
hydrogen is present, there will be an unusual sound, such as air escaping
through the pipes as hot water begins to flow. Do not smoke or have
open flame near the faucet at the time it is open.
This water heater can deliver scalding temperature water at any faucet in the
system. Be careful whenever using hot water to avoid scalding injury. Certain
appliances, such as dishwashers and automatic clothes washers may require
increased temperature water. By setting the thermostat on this water heater
to obtain increased water temperatures, the potential for scald injury
increases. To protect against injury, you should install an ASSE approved
mixing valve in the water system. This valve will reduce point of discharge
temperature by mixing cold and hot water in branch supply lines. Such valves
are available from the manufacturer of this water heater or a local plumbing
supplier. Please consult with a plumbing professional.
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
Gas Connections
The gas supply lines must meet all requirements of the National Fuel Gas
Code, ANSI Z223.1-Latest Edition, or in Canada, the Natural Gas Installation
Code, CAN/CGA B149.1-Latest Edition, or Propane Installation Code,
CAN/CGA B149.2-Latest Edition.
The minimum permissible gas supply pressure for the purpose of input
adjustment is 1 in. (0.25 kPa) water column above the operating manifold
pressure. See the rating plate and gas valve for the manifold pressure and
gas type. The maximum permissible gas supply pressure is 14 in. (3.5 kPa)
water column for natural gas and liquefied petroleum gases/propane gas.
1. Connect this water heater only to the type of gas (Natural or Propane gas)
as shown on the rating plate. Use clean black iron pipe or equivalent
material approved by local codes and ordinances. Dirt and scale from the
pipe can enter the gas valve and cause it to malfunction. Therefore, the
inlet gas line must have a minimum length of 3 in. (7.6 cm) drip leg
(sediment trap) installed as close to the water heater’s gas valve as
possible. A ground joint union must be installed as close to the water
heater as possible in the gas supply line feeding the water heater to
permit servicing of the water heater. Compounds used on the threaded
joints of the gas piping must be resistant to the action of liquefied
petroleum gases/propane gas. DO NOT apply pipe dope to the gas valve
inlet and make certain that no pipe dope has become lodged in the inlet
screen of the gas valve. Extreme care must be taken to ensure no pipe
dope enters the gas valve. Avoid excessive torque when tightening the
gas supply line to the gas valve. Excessive torque may result in cracking
of the gas valve housing and could create a gas leak. When tightening
gas supply line to a L.P. control, it is recommended to hold the inlet body
of the control securely with an adequate wrench. The suggested
maximum torque is 31.5 ft. lbs. (4.4 kg-m).
WARNING
The manufacturer of this water heater will not be liable for any damage or
injury caused as a result of a cracked gas inlet as a result of excessive
torque.
2. This water heater and its gas connection must be leak tested before
placing the water heater in operation. Check for gas leaks with a soap
and water solution and a brush or a commercial leak detector fluid.
NEVER USE A MATCH OR OPEN FLAME FOR TESTING!
3. While checking for leaks, care must be taken to prevent solution from
contacting the electrical connections at the control. If electrical
connections at the control become wet, they must be thoroughly dried
before attempting to operate the water heater.

17
CAUTION
The water heater and an individual shut-off valve must be disconnected
from the gas supply piping system during any pressure testing of the
system at test pressures in excess of 1/2 psi (3.5 kPa). The water heater
must be isolated from the gas supply piping system by closing its manual
shut-off valve during any pressure testing of the gas supply system at test
pressures equal to or less than 1/2 psi (3.5 kPa). The supply line must be
capped when not connected to the water heater.
Electrical Connections
All electrical wiring and connections must be in accordance with the National
Electric Code ANSI/NFPA No. 70-Latest Edition, or the Canadian Electrical
Code C22.1-Latest Edition, and any local codes which may apply. The water
heater must be electrically grounded.
If a flexible line cord and plug is permitted by local code, then provide a (3)
three wire grounding type receptacle within 6 ft (1.9 m) of the water heater and
use the flexible cord provided. Do not plug the line cord into a receptacle that
can have its power supply interrupted by a switch that is used to turn on and
off lights.
Turn off the water heater gas valve and disconnect power to the water heater.
If wiring in conduit is required, cut the flexible line cord at least 6 in. (15.2 cm)
from the bushing. Unscrew the damper, flip it over, and pull the cord into the
damper housing. Cut the three wires from the line cord at the bushing inside of
the housing. Drill a hole to receive the 1/2” electrical conduit connector on the
side of the damper. Wire the power supply into the circuit at the appropriate
locations.
Set the damper right side up and screw it do the jacket head as it was
previously mounted. Re-connect the damper wire harness to the damper.
Connect power to the water heater and turn the water heater gas valve back
on.
CAUTION
Turn off or disconnect the electrical power supply to the water heater before
servicing. Label all wires prior to disconnection when servicing controls.
Wiring errors can cause improper and dangerous operation. Verify proper
operation after servicing.
Route the damper power cord to eliminate any trip hazards and prevent any
cutting and abrasion.
WARNING
Do not position the damper power cord where it can be cut or severed. The
damper power cord’s position must be consistent with National Electric
Code ANSI/NFPA No. 70-Latest Edition, or the Canadian Electrical Code
C22.1-Latest Edition, and any local codes which may apply.

18
Wiring Diagram
(Applies to RG1D and RG2D models)

19
(Applies to URG1D models)

20
GENERAL OPERATION
WARNING
Water heaters are heat producing appliances. To avoid damage or
injury, there must 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 system. 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.
To Fill the Water Heater:
1. Close the water heater drain valve by turning the knob clockwise.
2. Open the cold water supply shut-off valve.
3. Open several hot water faucets to allow air to escape from the system.
4. When a steady stream of water flows from the faucets, the water heater is
filled. Close the faucets and check for water leaks at the water heater
drain valve, combination temperature and pressure relief valve, and the
hot and cold water connections.
To Drain the Water Heater:
Should it become necessary to completely drain the water heater, make sure
you follow the steps below:
1. Shut off the gas supply to the water heater.
2. Turn off/disconnect all electric power to the water heater.
3. Close the cold water supply shut-off valve.
4. Open the drain valve on the water heater by turning the knob counter-
clockwise. The drain valve has threads on the end that will allow the
connection of a standard hose coupling.
5. Open a hot water faucet to allow air to enter the system.
To refill the water heater, refer to “To Fill the Water Heater.”