Bradford White UCG-80H-125-3NA, UCG-80H-199-3NA, UCG-80H-270-3NA, UCG-80H-399-3NA, UCG-100H-199-3NA Installation Manual
...
serviced by a plumbing professional.
injury or death.
WARNING
GAS-FIRED COMMERCIAL WATER HEATER
(Ultra Low NOx)
If the information in these
instructions is not followe d exactly,
a fire or explosion may result
causing property damage, personal
- Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
- WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch;
do not use any phone in your
building.
• Immediately call your gas supplier
from a neighbor’s phone. Follow
the gas supplier’s instructions.
• If you cannot reach your gas
supplier, call the fire department.
- For your family’s comfort, safety and
convenience, it is recommended this
water heater be installed and
Ambler, PA 19002
Tech Service (800) 334-3393
Service Parts (800) 538-2020
Warranty Service (800) 531-2111
INSTALLATION/OPERATION MANUAL
PLACE THESE INSTRUCTIONS ADJACENT TO W ATER HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE RE FERENCE
WITH TROUBLESHOOTING GUIDE
238-50463-00H REV 5/18
READ CAREFULLY
NOTICE
WARNING
CAUTION
DANGER
NOTICE
TABLE OF CONTENTS
SECTION I: IMPORTANT INFORMATION
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.
Indicates an imminently hazardous situation, which, if
not avoided, will result in death, serious injury or
substantial property damage.
Indicates a potentially hazardous situation, which, if not
avoided, could result in death, serious injury or
substantial property damage.
This water heater has a limited warranty. The warranty for this water heater is valid only if the water heater has been
installed, maintained and operated in accordance with these instructions.
SECTION I: IMPORTANT INFORMATION................ 2
Indicates potentially hazardous situation, which, if not
avoided, may result in moderate or minor injury or
property damage.
Indicates special instructions on installation, operation
or maintenance, which are important but not related to
personal injury hazards.
SETION VIII: ELECTRICAL CONNECTIONS .......... 25
SECTION II: SPECIFICATIONS ................................ 5
SECTION III: GENERAL INFORMATION ................. 6
SECTION IV: INSTALLATION INSTRUCTIONS ....... 8
SECTION V: VENTING ........................................... 13
SECTION VI: WATER CONNECTIONS .................. 19
SECTION VII: GAS CONNECTIONS ...................... 23
SECTION IX: OPERATING INSTRUCTIONS .......... 26
SECTION X: MAINTENANCE .................................. 35
SECTION XI: DIAGNOSTIC AND
TROUBLESHOOTING GUIDE ................................ 39
SECTION XII: PARTS LIST ..................................... 58
2
DANGER
DO NOT s tore or use gasoline or other f lammable, combustible, or c or ros ive vapors and/or liquids in the vicinity of this or
any other appliance.
This water heater is equipped with an adjustable thermostat to control water temperature. Hot water temperatures
The slower
to draw their own bath water. NEVER leave a child or disabled person unattended in a bathtub or shower.
Toxic chemical, 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 nonpotable water heating appliance.
All piping components c onnec ted to this water heater for space heating applications must be suitable for use with potable
WARNING
Improper installation, adjustments, alteration, service or maintenance can cause property damage, personal injury or loss
and service technician.
This water heater requires regular maintenance and service to operate safely. Follow the instructions contained in this
manual.
Installation, maintenance, and service must be performed only by a qualified, skilled and knowledgeable installer or
service provider.
Installation is not complete unless a temperature and pressure relief valve is installed into the proper location at the top of
this water heater.
It is the responsibility of the installing contractor to see that all controls are correctly installed and are properly operating
when the installation is complete.
This water heater is suitable for installation on combustible flooring. Do not install water heater directly on carpeting.
DO NOT operate this water heater without first being certain it is filled with water.
DO NOT tamper with or alter the water heater and/or controls.
DO NOT operate water heater with jumpered or absent controls or safety devices.
DO NOT operate water heater if any external part has been under water. Immediately call a qualified service technician to
inspect the appliance 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
company if there are any questions.
Incorrect operation of this appliance may create a hazard to life and property and will nullify the warranty.
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 pi pe fittings nor attempt to disconnect
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
heater’s efficiency.
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.
response time of disabled pers ons increases the hazards to them. NEVER allow small children to use a hot water tap, or
water.
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
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
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
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
3
WARNING
This water heater needs fresh air for safe operation and must be installed so there are provisions for adequate
cient air supply will cause a recirculation of combustion products resulting in
and flue tubes and creates a risk of asphyxiation.
Water heater materials of construction, pr oducts of combustion and the fuel c ontain carbon monoxide, nitrogen oxides,
Always use proper safety clothing,
respirators and equipment when servicing or working nearby this water heater.
Flammable items, pressurized containers or any other potential fire hazardous articles must never be placed on or
this water heater.
Insulation blankets are not required for this water heater. This water heater meets or exceeds the ASHRAE/IES 90.1b
(latest edition) standards with respect to insulation and standby loss requirements.
Setting the water temperature to the maximum set point can result in scalding hot water delivered to the faucets. It is
the time it is open.
Basements, crawl spaces, c losets and areas below ground level will serve as pockets f or accum ulation of leaking gas.
WARNING
combustion and ventilation air. Insuffi
contamination that m ay be hazardous to life. T his will result in carboning or sooting of the com bustion chamber, burner ,
aldehydes and/or other toxic or harmful substanc es which can cause death or ser ious injury and which are known to the
state of California to cause cancer, birth defects and other reproductive harm.
adjacent to the water heater. O pen containers of f lam m able m aterial should not be stor ed or used in the s am e room with
highly recommended that the maximum setpoint be adjusted to the lowest temperature possible for the needs of the
installation. See following section in this Installation/Operation Manual to change the maximum setpoint limit (max
setpoint). Make sure the water heater control display is not in a public area that can result in the temperature settings
being improperly adjusted.
Hydrogen gas can be produced in an operating water heater that has not had water drawn fr om the tank for a long period
of time (generally two weeks or more). Hydrogen gas is extrem ely flammable. To prevent the possibility of injury under
these conditions, we recomm end the hot water faucet to be open for several m inutes at the kitchen sink before you use
any electrical appliance, which is connect to the hot water system. If hydrogen is present, there will be unusual sounds
such as air esc aping through the pipes as hot water begins to f low. Do not smoke or have open flame near the f aucet at
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 A P PLIAN C E UN TIL THE LEAK A G E IS C O R REC TED !
To comply with NSF requirements this water heater is to be: Sealed to the floor with sealant, in a smooth and easily
cleanable way.
4
Model Description
A
Floor to
B
Vent
C
Water
(in)
D
Floor
to T&
E
to Hot
Water
F Floor
G
to Gas
Water
Conn.
Gas
Conn.
Relief
Valve
NAT. & L.P.
UCG100H199
100
199,999
73 ¼ 6 10
52 ½
55 ½
69 ¾
63 ¼
1 ½ ¾ ¾
UCG100H270
100
270,000
73 ¼ 6 10
52 ½
55 ½
69 ¾
63 ¼
1 ½ ¾ 1
UCG100H399
98
399,999
77 ¼ 8 10
52 ½
55 ½
69 ¾
63 ¼
1 ½ ¾ 1
UCG80H125
80
125,000
63 5 10
44
47
61 ¼
55 ¾
1 ½ ¾ ¾
UCG80H199
80
199,999
64 ¾ 6 10
44
47
61 ¼
55 ¾
1 ½ ¾ ¾
UCG80H270
80
270,000
64 ¾ 6 10
44
47
61 ¼
55 ¾
1 ½ ¾ 1
UCG80H399
80
399,999
68 ¾ 8 10
44
47
61 ¼
55 ¾
1 ½ ¾ 1
Model Description
A
Floor to
B
Vent
C
Floor
Water
Conn.
(mm)
D
Floor
E
Floor
to Hot
Water
Conn.
F Floor
of Water
G Floor
Water
Conn.
Gas
Conn.
Relief
Valve
NAT. & L.P.
UCG100H199
379
58.6
1861
152
254
1334
1410
1772
1607
38
19
19
UCG100H270
379
79.1
1861
152
254
1334
1410
1772
1607
38
19
25
UCG100H399
371
117.2
1962
203
254
1334
1410
1772
1607
38
19
25
UCG80H125
303
36.6
1600
127
254
1118
1194
1556
1391
38
19
19
UCG80H199
303
58.6
1899
152
254
1118
1194
1556
1391
38
19
19
UCG80H270
303
79.1
1899
152
254
1118
1194
1556
1391
38
19
25
UCG80H399
303
117.2
2000
203
254
1118
1194
1556
1391
38
19
25
SECTION II: SPECIFICATIONS
Figure 1. Dimensional Layout.
Table 1. Specifications.
Model Number
Model Number
Capacity
(Gal.)
Capacity
Liters
Input BTU/Hr.
Input kW/Hr.
Top of
Vent
(in.)
Top of
Vent
(mm)
Dia.
(in)
Dia.
(mm)
Floor
to
Cold
Conn.
P
(in)
Floor
Conn.
(in)
to Top
of
Water
Heater
(in)
Floor
Conn.
(in)
Dia.
(in.)
Dia.
(in.)
(in.)
to Top
to Gas
to
Cold
to
T&P
(mm)
(mm)
Heater
(mm)
Conn.
(mm)
Dia.
(mm)
Dia.
(mm)
(mm)
5
SECTION III: GENERAL INFORMATION
FEATURES
This water heater contains the following features:
MAIN POWER ON/OFF SWITCH
The front panel of this water heater has an ON/OFF switch, which has markings when the main power is turned on to
indicate power to the water heater.
COMBUSTION SYSTEM
This water heater is equipped with a self-compensating negative pressure pre-mix combustion system. As the blower
operates, air is drawn in through the air intak e and into a venturi, which pulls gas from the gas valve. The gas and air is
then mixed in the combus tion blower and sent through t he trans ition tube into the burner. The Direct Spark Ignition System
(DSI) then ignites the gas/air fuel mix ture to produce flue products (combustion). The flam e sensor signals the ignition
control board (described below), that a flame is present.
HONEYWELL INTEGRATED CONTROL
Consists of a control board and a water heater display. An attractive digital water heater display is on the top front of the
water heater for precisely setting and displaying the temperature setpoint and monitoring the status of the water heater.
Pressing the temperature UP and DOWN buttons changes the temperature setpoint. The temperature format may be
displayed in degrees F or degrees C. The water heater display will show diagnostic codes in the event the water heater
needs servicing. The temperature readings of the tank sensor can be monitor ed in Service Mode. Also in Service Mode,
the display can show up to 10 previous error codes to further aid in servicing the water heater.
The single control boar d has plug in wiring harnesses to reduce the chance of mis-wiring. The control board contr ols all
ignition, temperature, and combus tion blower f unctions . The control board controls the combustion blower, ignition timings,
and gas valve to control the combustion system in order to maintain the desired tank temperature. The sequence of
operation is described in detail in the Diagnostic Section at the back of this Installation and Operating Instruction Manual.
ADJUSTABLE THERMOSTAT
This water heater is equipped with an adjustable thermostat as part of the Integrated Control System to control water
temperature. Hot water temperatures required for automatic dishwasher and laundry use can cause scald burns r esulting
in serious personal injury and/or death.
The temperature m ay be adjusted from about 70°F (21°C) to about 180°F (82°C). The thermostat was adjusted to 70°F
(21°C) before the water heater was s hipped from the factory. It is recomm ended that lower tem perat ures be us ed to avoid
the risk of scalding. Refer to the “War nings” and the sec tion on SCALDING in “Sec tion V: Water Connections”. It is further
recommended, in all cases, that the water temperature be set f or the lowest temperature, which satisfies your hot water
requirements for the installation. This will also provide the most energy efficient operation of the water heater and
minimizes scale formation.
Setting the water heater temperature at 120°F (49°C) will reduce the risk of scalds. Some states require setting lower
temperatures for specific installations.
The top immersion well of the single sens or c ontr ol also c ontains a r edundant s ensor f or the high lim it ( energy cutoff ). The
high limit circuit interrupts the m ain burner gas flow should the water temperature exceed approx imately 200°F (93°C).
Error code “65” will be shown on the water heater control display if the high limit temperature has been exceeded.
Should the high limit switch activate, it must be m anually reset. T his should only be done by a service technician after the
cause of overheating has been corrected. Refer to the section on “Accessing Service Mode on the Display” in the
Diagnostic section of this Installation and Instruction Manual.
Contact your qualified installing contractor, service provider or manufacturer listed on the rating plate if continued high limit
operation occurs.
LATCHES
The latches allow easy access for servicing the water heater from the top. Simply remove the two latches for s er vicing and
re-latch upon completion. No tools are required to obtain access to the top of the water heater.
6
WARNING
This product contains one or more chemicals known to the State of
California to cause c ancer, birth defects, or reproductive harm.
Keep clear of combination temperature and pressure relief valve discharge line outlet. The discharge may be
WARNING
hot enough to cause scald injury. The water is under pressure and may splash.
For protection against excessive temperatures and pressure, install temperature and pressure protective equipment
required by local codes, 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, ANS Z21.22 and the Standard CAN1-4.4 Temperature, Pressure, Temperature and
Pressure Relief Valves and Vacuum Relief Valves. The combination temperature and pressure relief valve must be
marked with a maximum set pressure 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 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 combination temperature and
pressure relief valve.
Do not place a valve between the combination temperature and pressure relief valve and the tank.
DISHWASHING MACHINE REQUIREMENTS
All dishwashing machines meeting the National Sanitation Foundation requirem ents are designed to operate with water
flow pressures between 15 and 25 pounds per square inch. Flow pressures above 25 pounds per square inch, or below 15
pounds per square inch, will result in improperly sanitized dishes.
The National Sanitation Foundation also recommends circulation of 180°F water. Where this is done, the circulation should
be very gentle so that it does not cause any unnecessary turbulence inside the water heater. The circulation should be just
enough to provide 180°F water at the point of take-off to the dishwashing machine. Adj ust flow by means of the valve in
the circulation line.
SACRIFICIAL ANODES – Three sacrificial anode rods have been installed in the tank head to extend tank life. The
anode rods should be inspected periodically for corrosion and replaced when necessary to prolong tank life. Water
conditions in your area will influence the time interval for inspection and replacement of the anode rods. The use of a
water softener may increase the speed of anode cons umption. More frequent inspection of the anodes is needed when
using softened (or phosphate treated) water. Cont act the installing contrac tor, or s ervice provider that ins talled the water
heater or the manufacturer listed on the rating plate for anode replacement information.
7
INSTALLATION OF THIS WATER HEATER REQUIRES ABILITY EQUIVALENT TO THAT OF A LICENSED
Y AND
UNDER NO CIRCUMSTANCES SHALL FLAM MABLE MATERIALS, SUCH AS GASOLINE OR PAINT
SECTION IV: INSTALLATION INSTRUCTIONS
WARNING
TRADESPERSON IN THE FIELD INVOLVED. PLUMBING, AIR SUPPLY, VENTING, GAS SUPPL
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 f ade” c an cause the odor ant to dim inish in intensity, or “fade”, and not be as
readily detectable.
• If you have a diminished sense of sm ell, or are in any way unsure of the presence of gas, imm ediately 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/pr opane 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!
This water heater m ust be located in an area where leakage of the tank, water line connections, or the com bination
temperature and pressur e relief valve will not result in damage to the ar ea adjacent to the water heater or to lower floors
of the structure. When such locations cannot be avoided, a suitable drain pan m ust be ins talled under the water heater.
The drain pan depth must be suitable f or dr aining and collecting water, and have a minimum length and width of at least
four (4) inches (10.0 cm ) measured from the jac ket of the water heater. The drain pan, as described above, can be
purchased from your plumbing prof essional. The water heater m ight need to be placed on bloc ks inside dr ain pan to fit
in standard size pan. The drain pan m us t be piped to an adequate drain. The piping must be at least ¾ inch (2.0 cm ) in
diameter and pitched for proper drainage.
Water heater s are heat produc ing appliances. To avoid dam age or injury there mus t be no materials st ored against the
water heater and proper care m ust be tak en to avoid unnecess ary contact (espec ially by children) with the water heater
components.
THINNER BE USED OR STORED IN THE VICINIT Y O F T HIS W ATER HEATER, VENT-AIR INTAKE SYSTEM OR IN
ANY LOCATION FROM WHICH FUMES COULD REACH THE WATER HEATER OR VENT-AIR INTAKE SYSTEM.
Failure to adhere to these installation and operating instructions may create a hazard to life and property and will nullify
the warranty.
Sacrificial anode rods have been installed in the tank head of the water heater to extend tank life. The r emoval of these
anodes, except for inspection and/or r eplacement, will nullify the warranty. In areas where water is unusually active, an odor
may occur at the hot water faucet due to a react ion between the sacrificial anode and the impurities in the water. If this
should happen, alternative anodes may be purchased from the supplier that installed this water heater. This will minimize
the odor while protecting the tank. Additionally, the water heater should be flushed with appropriate dissolvers to eliminate
any bacteria.
Note: For California installation this water heater must be braced, anchored, or strapped to avoid falling or moving
during an earthquake. See instructions for correct installation procedures. Instructions may be obtained from DSA
Headquarters Office, 1102 Q Street, Suite 5100, Sacramento, California 95811.
This water heater MUST be installed indoors out of the wind and weather.
8
The National Fuel Gas Code (ANSI Z233.1- latest edition) or in Canada The Natural Gas Installation Code
CAUTION
DAMAGE TO THE WATER HEATER CAUSED BY EXPOSURE TO CORROSIVE VAPORS IS NOT COVERED BY
STORE ANY POTENTIALLY CORROSIVE COMPOUNDS IN THE VICINITY OF THE WATER HEATER.
NOTICE
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 elimina te the probable ignition of gasoline or flammable vapors.
CAN/CGA (B149.1 - latest edition), expressly prohibits the following:
a. Installation of a water heater in a bathroom, bedroom, or any occupied room normally kept closed.
b. Installation of a water heater in a garage, unless the unit is installed so that the burner and ignition devices are at
least eighteen (18) inches (45.8 cm) above floor level and protected to avoid damage by a moving vehicle.
If the buildings 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.
The location of this water heater is of the utmost importance. Before installing this water heater, you should read the
Installation section of these instructions . After r eading these Installation and Oper ating Instruc tions, select a loc ation for the
water heater where the floor is level and is easily accessible to water lines, gas supply (type identified on the rating plate),
an adequate open drain, and a chimney or exhaust gas vent. DO NOT locate the water heat er where water lines could
be subjected to freezing temperatures. Make sure the cold water pipes are not located directly above the gas
control box or any other electrical control so that condensate during humid weather does not drip on the controls.
This installation must allow access to the front of the water heater and adequate clear ance must be provided for servicing
and operating this water heater. The water heater m ay be installed on either a combustible or non-com bustible floor. If the
water heater is to be installed directly on carpeting, it must be ins talled on top of a metal or wood panel (or equivalent)
extending beyond the full width and depth of the appliance by at least three (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. The minimum clearances to
combustibles for this water heater are given in the following pages. A minimum of 24 inches front clearance must be
provided for inspection and servicing. Adequate clearances must be provided for easy access to controls by service
personnel to enable proper cleaning, servicing, and operation of the water heater.
Water heater corrosion and com ponent failure can be caused by the heating and breakdown of airborne chem ical vapors.
Examples of some typical compounds that are potentially corrosive are: spray can propellants, cleaning solvents,
refrigerator and air conditioning refrigerant s, swimming pool chem icals, 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.
THE WARRANTY. DO NOT OPERATE THE WATER HEATER IF EXPOSURE HAS OR WILL OCCUR. DO NOT
UNPACKING
1. Inspect carefully for any signs of damage
2. All equipment is carefully manufactured, inspected and packed.
3. Any claims for damage or shor tage in shipment must be filed immediately with the manufacturer noted on the
rating plate label.
LOCATE WATER HEATER
1. Locate water heater in front of final position before removing crate.
2. LOCATE so that venting connections will be short and direct.
3. THIS WATER HEATER IS SUITABLE FOR INSTALLATION ON COMBUSTIBLE FLOOR.
4. 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.
5. It is recommended that minimum clearances shown in figure 2b be provided on the sides and top of the water
heater for servicing and maintenance of the water heater.
6. Increase distances to provide clearance for servicing.
9
Input
Front, sides and Rear “A”
399,999 BTUH
0 in. (0.0 CM) (2 in. Rear
ONLY)
Less than or equal to 270,000 BTUH 0 in. (0.0 CM)
Figure 2a. Minimum Clearance To Combustible Material.
Figure 2b. Recommended Minimum Clearances For Service Access.
10
CAUTION
Do not drop water heater. Do not bump water heater jacket against floor.
DANGER
Temperature setting should not exceed safe temperature at fixtures. See water temperature control warning in Section
approved mixing device for hot water supplied to fixtures.
WARNING
Temperature and pressure relief valve discharge piping must be piped near floor to eliminate potential of severe burns.
IMPORTANT-The flow of combustion and ventilating air must not be obstructed.
WARNING
REMOVE CRATE
1. Remove all banding and pry off crate sides carefully so as not to damage the water heater.
2. Carefully roll/lift the water heater from the crate base.
Do not bump exhaust vent pipe against crate or other objects. This will damage the heater and cause it to be inoperable
or create nuisance problems.
MOVE WATER HEATER TO PERMANENT POSITION by sliding or walking.
INSTALL TEMPERATURE AND PRESSURE RELIEF VALVE (if not already installed).
VI, “Water Connections”. If higher preheat temperatures are necessary to obtain adequate booster output, add an ASSE
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.
This water heater must be located in an area where the general public does not have access to set temperatures.
AIR REQUIREMENTS
1. Do not obstruct the flow of ventilating air.
2. For safe operation, adequate air is needed for c ombustion and ventilation. Sooting may result in serious dam age
to the water heater and risk of fir e or ex plosion. It can also create a risk of asphyxiation. Such a condition often will
result in a yellow, luminous burner flame, causing carboning or sooting of the combustion chamber, burner and
flue tubes.
MECHANICAL EXHAUS TING OF ROOM AIR - Where an exhaust fan is installed in the same room with this water
heater and combustion air is drawn from inside the room, sufficient openings for air must be provided in the walls.
UNDERSIZED OPENINGS WILL CAUSE AIR TO BE DRAWN INTO THE ROOM THROUGH THE WATER HEATER’S
VENTING SYSTEM, CAUSING POOR COMBUSTION THAT MAY BE HAZARDOUS TO LIFE. SOOTING MAY
RESULT IN SERIOUS DAMAGE TO THE WATER HEATER AND RISK OF FIRE OR EXPLOSION, WHICH CAN
ALSO CREATE A RISK OF ASPHYXIATION. Refer to local codes and /or 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) for proper air opening sizing.
CONFINED SPACES
If the water heater is installed in a confined space (volume is less than 50 ft.3/1000 BTU (15 m3/0.29 kW) per hour of the
total input rating of all gas appliances in that space), air must be supplied through two permanent openings. One opening
must be within 12 inches (30.5 cm) from the top of the enclosure and one within 12 inches (30.5 cm) of the bottom. The
openings must be protected by metal louvers or 1/4” (6.4 mm) min. mesh metal screen. The size of the openings are as
follows:
11
The draft hood relief opening of the water heater and combustion air inlet must be in the same atmospheric pressure
CAUTION
zone. Large exhaust fans in kitchens and other locations can lower the air pressure inside an enclosure and interfere
with the proper operation and venting of the water heater. In these cases, the water heater should be installed in a
separate room with the combustion and ventilation air supplied directly from outdoors as previously described.
1. If the openings communicate directly with an additional room(s) of sufficient volume, each opening must have a
2
minimum free area opening of 1 in.
appliances in the confined space, but not less than 100 in.
/1000 BTU (2.54cm2/0.29kW) per hour of the total input rating of all gas
2
(254 cm2).
2. If the openings communicate with the outdoors through horizontal ducts, each opening must have a minimum free
2
area of 1 in.
/2000 BTU (2.54cm2/0.59kW) per hour of the total rating of all gas appliances in the enclosure.
3. If the openings communicate directly with the outdoors or through vertical ducts with the outdoors, each opening must
2
have a minimum free area of 1 in.
/4000 BTU (2.54cm2/1.18kW) per hour of the total rating of all gas appliances in
the enclosure.
ALL AIR FROM INSIDE THE BUILDING
The confined space must be provided with two permanent openings com municating directly with an additional room(s) of
sufficient volume so that the c ombined volume of all spaces meets the criteria for an unconf ined space. T he total input of
all gas utilization equipment installed in the combined space must be considered in making this determination. Each
2
opening must have a minim um free ar ea of 1 in.
utilization equipment in the confined space, but not less than 100 squar e inches ( 254cm
/1000 BTU (2.54cm2/0.29kW) per hour of the total input rating of all gas
2
). One opening must be within 12
inches (30.5 cm) of the top and one within 12 inches (30.5 cm) of the bottom of the enclosure.
UNCONFINED SPACES
In unconfined spaces in buildings, infiltration m ay be adequate to provide air for com bustion, ventilation and dilution of flue
gases. However, in buildings of tight construction ( f or example, weather stripping, heavily insulated, caulked, vapor barrier,
etc.), additional air may need to be provided using the methods described above under CONFINED SPACES: All Air F ro m
Outdoors or SPECIALLY ENGINEERED INSTALLATIONS.
SPECIALLY ENGINEERED INSTALLATIONS
The requirements noted under CONFINED SPACES above must 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.
CHEMICAL VAPOR CORROSION
Corrosion of the flue ways and vent system will occur if air for combustion contains certain chemical vapors. Such
corrosion may result in poor combustion and create a risk of asphyxiation, as well as reducing the life of the water
heater. Spray can propellants, cleaning solvents, refr igerator and air c onditioning ref riger ants, swim ming pool chemicals,
calcium and sodium c hloride, waxes and process chemicals are corrosive. Produc ts of this sort should not be stored
near the water heater or outside by the air intake (if applicable).
12
WARNING
The intake vent system must be properly installed. Failure to properly install the vent system could result in property
damage, personal injury, or death.
Use only the vent terminals provided or factory authorized terminals for venting this water heater.
The water heater requires its own separate intake venting system.
Do not terminate the venting where noise from intake venting will be objectionable. This includes locations close to or
rubber isolation pipe hangers are used. This prevents any vibrations from being transmitted into the living spaces.
Do not exceed the venting distances or the number of elbows listed in this manual. Exceeding the maximum venting
distances may cause the water heater to malfunction or cause an unsafe condition.
DO NOT operate this water heater until the venting installation is complete and the piping completed. Failure to complete
installation before operation can result in property damage, personal injury, or death.
The venting system must be installed properly follow ing all local codes or in the absence of local codes, the
WARNING
SECTION V: VENTING
latest edition of the National Fuel Gas Code (ANSI Z223.1- latest edition), or in Canada, The Natural Gas
Installation Code (B14 9 .1 -00 l atest ed iti on ) or CAN/CGA B149 . 2 Propane Inst allation Code (Latest Edition).
Failure to properly install t he venting syst em could result in property damage, personal injury, or death.
Caref ully inspect t he venting syst em of a replacement w at er heat er installation before connect ing to t he vent ing
system. A ll joints in t he vent connect or must be securely f astened w ith screw s and f it t ightly together. Inspect
t he venting syst em for signs of det eriorat ion (rust and perforat ion) and replace any sections t hat are not in good
condition.
The chimney must be lined and in good condit ion. Check t o make sure the venting sy st em is properly sized f or
t he w at er h eater . I f t he v ent in g sys tem w as previously sized f or anot her gas appliance that has been removed,
the venting system may now be too large. Refer to the latest edition of the National Fuel Gas Code (ANSI
Z223.1-latest edition), or in Canada, the Natural Gas and Propane Installation Code (B149.1-0 0 lat est edit ion)
for the correct sizing of venting systems and common venting with another gas appliance. Do not vent this
w at er heat er into t he vent ing syst em of anot her gas appliance designed t o v ent under positiv e pressure.
The w at er heat er sh ould be installed as c lose as prac tic al to t he venting syst em to minimize the vent connector
length required. Ref er to local codes for t he distance limitat ions on vent connect or lengths. At t he completion of
t he wat er heat er i nst al lat i on, t h e bur ner an d v ent ing system must be checked for proper operation wit h all other
commonly vented appliances in operation. Check f or spillage of flue product s around t he outside relief opening
of t he draf t hood aft er several minutes of operation. The f lame from a mat ch should be drawn int o t he draft hood.
Do not use the w at er heater or connect ed equipm ent if spillage is detect ed until t he problem is correc ted. Refer
t o the lat est edit ion of t he Nat ional Fuel Gas Code, or in Canada, t he Natural Gas and Propane Inst allat ion Code
f or complet e details on the ‘‘Procedure to Be Follow ed t o Place Equipment in Operation’’.
This w ater heater has been shipped w it h a draft divert er for whic h it w as designed w it h reference to t he horizont al
and vert ic al pl anes, i t s cert if ied cat egor y I, per l ates t A NSI Z 2 1 .1 0. 3 -2015.CSA 4.3-2 0 15 rev isi on. Ref er t o t h e
latest edition of the National Fuel Gas Code (ANSI Z223.1-latest edition), or in Canada, the Natural Gas and
Propane installation Code (B1 49.1-0 0 latest edit ion). If rem oved, t he draf t divert er must be replaced in t he same
position and secured to t he jacket t op by t he screw s w it h which it was installed.
This water heater must be connected to a lined masonry chimney or venting system approved by local codes or
ordinances. T he vent connector us ed to attach the draft hood outlet to the chimney or approved vent must be of the sam e
diameter as the draft diverter outlet or larger. For proper venting in certain installations, a larger vent connector may be
needed. Consult venting tables in ANSI standard ( Z223.1- latest edition), National Fuel Gas Code and CAN/CGA (B149.1
or B149.2-latest editions) Natural Gas and Propane Installation Code, or loc al code off icials for proper application for your
area.
Optional Intake Venting
The venting instructions mus t be f ollowed to avoid restric ted combustion or recirculation of flue gases. Such conditions
cause sooting or risks of fire and asphyxiation.
across from windows and doors. Avoid anchoring the intake vent pipes directly to framed walls, floors, or ceilings unless
13
For installations in Canada, field supplied vent piping must comply with CAN/CGA B149.1 (latest edition) and be certified to the
time limitations.
Approved Venting Materials
For installations in the US only
ABS Sch. 40 DWV (ASTM D2661)
For installations in CANADA
Approved Primers and Cements
For installations in the US only
• ABS Primer and Ceme nt (ASTM D-2235)
For installations in CANADA
NOTICE
Use of cellular core PVC (ASTM F891). Cellular core CPVC, or Radel® (polyphenosulfone) in non-metallic venting systems is
prohibitied, and covering non-metallic venting with thermal insulation is prohibited.
NOTICE
Before beginning installation of any vent pipe, read the vent pipe manufacturer’s installation instructions.
Do not install the water heater in any location where the ambient temperature may fall below freezing. Water heater must be
protected from freezing downdrafts during shutdown periods.
CAUTION
The vent shall terminate a minimum of 12 inches above expected snowfall level to prevent blockage of vent termination.
The horizontal centerline of the exhaust vent terminal (if applicable) must not be located lower than the horizontal centerline of the
air intake terminal if vented through the same wall.
A service drain loop must be installed in the drain tubing to serve as a condensate trap to prevent flue gases from escaping into the
room.
NEVER locate the air intake where exhaust gases from other appliances can be introduced into the intake.
CAUTION
Check to make sure flue gases do not recirculate into the air intake terminal when using direct venting. If the water heater is having
during periods of below freezing weather.
NOTICE
Standard For Type BH, Class II, 65°C, Gas Venting Systems, ULC S636. Components of this listed system shall not be interchanged
with other vent systems or unlisted pipe/fittings. All components and specified primers and cements of the certified vent system must
be from a single system manufacturer and not intermixed with other system manufacturer’s vent system parts. The supplied vent
connector and vent termination are certified under ULC S636 and are also certified as part of the water heater. Refer to the following
tables for approved venting materials, primers, and cements. All approved primers and cem ents are to be used within their marked
• PVC Sch. 40, 80 (ASTM D-1785)
• PVC DWV (ASTM-D2665)
• CPVC Sch. 40, 80 (ASTM-F441)
• CPVC (ASTM D2846)
•
• PVC and CPVC Primer (ASTM F-656)
• PVC Cement (ASTM D-2564)
• CPVC Cement (ASTM F493)
• ULC S636 approved CAN-COM VENTING SYSTEM
schedule 40 PVC for flue gas venting rated Class II,
65°C (components provided with water heater)
• IPEX ULC S636 approved schedule 40 PVC (all other
vent pipe/ fittings)
• IPEX ULC S636 approved PVC Primer and Cement for
flue gas venting rated Class II, 65°C
service issues, flue recirculation may be a contributing factor. Even when the minimum vent terminal separation distances are
followed, recirculation may still occur depending upon the location outside the building, the distance from other buildings, proximity to
corners, weather conditions, wind patterns, and snow depth. Periodically check to make sure that flue recirculation is not occurring.
Signs of flue gas recirculation include frosted or frozen intake terminals, condensate in the intake terminal and venting system,
oxidation or white chalk material on the flame sensor or igniter shield. Correction to flue recirculation may involve relocating the air
intake to another side of the building, or using inside air for combustion. Check to be sure the intake is not obstructed, especially
High levels of dust and debris such as road and construction dust, insects, and tree pollen may clog the burner resulting in poor
performance and damage to the water heater. Avoid air intake locations where debris can be created such as exhaust ventilation
hoods, gravel parking lots, and near outdoor spotlights that attract bugs. For these installations, an air intake filter kit, part number
239-47330-00A, is available as an accessory service part from the installer of this water heater. The air intake filter kit is not designed
to filter out airborne contaminants or chemicals that may damage the water heater.
14
Canadian
US Installations2
Canadian
US Installations2
A=
Clearance above
12 inches (30
12 inches
H=
Clearance to each side
3 feet (91 cm) within a
assembly
*b
B=
Clearance to window
36 inches (91
4 feet (1.2 m)
opening
I=
Clearance to service
36 inches
*b
C=
Clearance to
*b
*b
J=
Clearance to non-
any other appliance
36 inches
4 feet (1.2m)
above opening.
D=
Vertical clearance to
of the terminal
*b
*b
K=
Clearance to a
6 feet
3 feet (91 cm)
E=
Clearance to
*b
*b
L=
Clearance above paved
public property
7 feet
7 feet
F=
Clearance to outside
*b
*b
M=
Clearance under a
balcony
12 inches (30 cm) ‡
*b
G=
Clearance to inside
corner
36 inches
(91 cm)*a
36 inches
(91 cm)*a
Figure 3. Intake Vent Terminal Clearances (Referencing Other Appliance Venting Locations).
grade, veranda,
porch, deck or
balcony
or door that may be
opened
permanently closed
window
ventilated soffit
located above the
terminal within a
horizontal distance
of 2 feet (61 cm)
from the center line
unventilated soffit
corner
Installations1
cm)
cm)
(30 cm)
below or to the
side of opening;
12 inches (30
cm) above
of center line extended
above meter/regulator
assembly
regulator vent outlet or
oil tank vent
mechanical air supply
inlet to building or the
combustion air inlet to
mechanical air supply
inlet
sidewalk or paved
driveway located on
veranda, porch, deck, or
Installations1
height 15 feet (4.6 m)
above the
meter/regulator
(91 cm)
(91 cm)
(1.83 m)
(2.13 m)†
below or to side
of opening; 12
inches (30 cm)
above if within
10 feet
horizontally
(2.13 m)†
In accordance with the current CAN/ CGA-B149 Installation Codes.
2
In accordance with the current ANS I Z223.1-(Latest Edition)/NFPA 54 National F uel Gas Code.
† A vent shall not termi nate directly above a sidewalk or paved driveway that is located between two single-family dwellings and serves both
dwellings.
‡ Permitted only if a veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor.
*a) A minimum clearance value determined by testing in accordanc e with section 2.20.
*b) “Clearance in accordance with local i nstallation codes and the requirements of the gas supplier”.
15
CAUTION
Failure to properly support the vent piping with hangers and clamps may result in damage to the water heater or venting
Clearance to combustibles for all venting pipes and terminals
For installations in the CANADA
instructions for clearances to combustibles
WARNING! DO NOT USE 2”
MODELS
Vent pipes serving power vented appliances are classified by building codes as “vent connectors”. Required clearances
from com bus tible materials must be provided in accordance with inform ation in this manual under LOCATION OF WAT ER
HEATER and CLEARANCES, and with National Fuel Gas Code and local codes.
For installations in the US
0” minimum
DO NOT place insulation or other materials in the required clearance spaces between the venting to combustible material unless
otherwise specified.
Refer to vent pipe and terminal manufacturer’s installation
Horizontal Installation
In a horizontal application, it is important that moisture is not to be allowed to buildup in the intake vent pipe. To prevent
this from happening, the pipe should be installed with a slight downward slope so the moisture will run back away from the
water heater. The vent system must be supported every 5 feet of vertical run and every 3 feet of horizontal run of vent
pipe length.
system.
VENT WITH UCG100H399
Figure 4. Typical Horizontal Intake Vent System.
16
CAUTION
Failure to properly support the vent piping with hangers and clamps may result in damage to the water heater or venting
WARNING! DO NOT USE 2”
MODELS
Vertical Installation
Vertical venting system must be supported every 5 feet of vertical run and every 3 feet of horizontal run of vent pipe
length.
system.
VENT WITH UCG100H399
Figure 5. Typical Vertical Intake Vent System Installation.
17
Max Vent
Length (feet) 2”
Max Vent
Length (feet) 3"
Max Vent
Length (feet) 4"
UCG100H199
20
50
75
UCG100H270
20
50
75
UCG100H399
N/A
25
50
UCG80H125
20
50
75
UCG80H199
20
50
75
UCG80H270
20
50
75
UCG80H399
N/A
25
50
WARNING! DO NOT USE 2”
MODELS
Through The Wall Venting With Low Ground Clearance:
When venting cannot ex it through the wall at a height greater than or equal to 12” (30.5 cm) (and above expected snow
level) from the ground, then the installation must be modified as shown below (see Figure 6).
VENT WITH UCG100H399
Figure 6. Vent Terminal (Low Ground Clearance
).
Maximum Vent Length
Table 2. Maximum Intake Vent Length.
Model Number
Determining required vent length
1. Determine the total length of straight vent pipe (in feet) required for the intake.
2. Add 5 feet of venting for every 90° elbow.
3. Add 2 ½ feet of venting for every 45° elbow.
4. Total vent length cannot exceed “Max Vent Length” on the venting table shown above.
Example of Total Vent Length for UCG100H199 installation:
A 3” venting system has a total of t hr ee 90-degree elbows and a total straight pipe length of 30 feet.
Equivalent vent length for elbows: 3 x 5 f eet = 15 feet.
Total equivalent vent distance = 30 feet + 15 feet = 45 feet total equivalent vent length. This is below
the maximum allowed distance of 50 feet for this model using 3” vent.
18
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