Bradford White EFTM Installation instructions

Internet Version for Reference Only
ULTRA HIGH EFFICIENCY COMMERCIAL GAS WATER HEATER
(EF™ Series Models)
- 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 b
y
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 Parts [phone]
Warranty Service [phone]
Part No. 238-44445-00E 09/06
INSTALLATION/OPERATING MANUAL
WITH TROUBLESHOOTING GUIDE
PLACE THESE INSTRUCTIONS ADJACENT TO WATER HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE

Internet Version for Reference Only
SECTION I: IMPORTANT INFORMATION
n
j
ur
y
hazards.
Indicates an imminently
hazardous situation, which, if not
avoided, will result in death,
serious injury or substantial
property damage.
DANGER
Indicates potentially hazardous
situation, which, if not avoided,
may result in moderate or minor
injury or property damage.
CAUTION
Indicates a potentially hazardous
situation, which, if not avoided,
could result in death, serious
injury or substantial property
dama
g
e.
WARNING
Indicates special instructions on
installation, operation or
maintenance, which are
important but not related to
p
ersonal i
NOTICE
READ CAREFULLY
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
p
late) available from CSA Standards Association, 178 Rexdale Blvd., Etobicoke, Ontario, Canad
a
M9W 1R3.
This water heater must be installed in accordance with local codes. In the absence of local codes, i
t
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 a
t
various risk levels, or to important information concerning product life.
This water heater has a limited warrant
y
. The warrant
y
for this water heater is valid onl
y
if the
water heater has been installed, maintained and operated in accordance with these instructions.
NOTICE
I IMPORTANT INFORMATION................2 VII GAS CONNECTIONS............................33
II SPECIFICATIONS....................................5 VIII ELECTRICAL CONNECTIONS...........35
III GENERAL INFORMATION....................6 IX OPERATING INSTRUCTIONS.............36
IV INSTALLATION INSTRUCTIONS.........9 X MAINTENANCE....................................39
V WATER CONNECTIONS.......................15 XI TROUBLE SHOOTING GUIDE............43
VI VENTING................................................17 XII PARTS LIST...........................................44
TABLE OF CONTENTS
2

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DANGER
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.
DO NOT install any damaged venting system components. If damage is evident then please contact the supplier
where the water heater was purchased or the manufacturer listed on the rating plate for replacement parts.
Use only vent terminals provided or factory 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.
Failure to properly install the vent and air intake (if applicable) system could result in property damage, personal
injury, or death
WARNING
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 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 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
agency 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 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.
3

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WARNING
This water heater needs fresh air for safe operation and must be installed so there are provisions for adequate
combustion and ventilation air. Insufficient air supply will cause a recirculation of combustion products resulting in
contamination that may be hazardous to life. This will result in carboning or sooting of the combustion chamber,
burners, and flue tubes and creates a risk of asphyxiation.
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.
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 should not be stored or used in the same room
with 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.
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 connect to the hot water system. If hydrogen is present, there will
be unusual sounds 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.
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 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!
4

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SECTION II: SPECIFICATIONS
Figure 1. Dimensional Layout
Recovery GPH
At Degree Rise DIMENSIONS ( INCHES )
Model No.
Input
Rate
BTU/h
1st Hr.
Del.
Gal.
At
100°F
Rise 40°F 100°F 140°F
Stg.
Cap.
U.S.
Gal.
Therm.
Eff.
%
A
Ht.
B
Dia.
C
Flr to
Vent
Outlet
D
Flr to
Inlet
Wtr.
Conn
E
Flr to
T&P
Valve
Conn
F
Fl. to
Outlet
Wtr.
Conn
G
Fl. to Air
Intake
H
Fl. to
Gas
Conn.
Front
Wtr.
Conn.
Dia.
Space
Heating
Conn.
Dia.
Gas
Conn.
Dia.
Relief
Valve
Open.
Shpg.
Wt.
(LBS)
EF60T125 125,000 187 364 145 104 60 96.0 57 28 1/4 5 13 40 42 1/2 52 ½ 53 ½ 1 ½ 1 ¾ ¾ 570
EF60T150 150,000 211 423 169 121 60 93.0 57 28 1/4 5 13 40 42 1/2 52 ½ 53 ½ 1 ½ 1 ¾ ¾ 570
EF60T199
EF100T150
EF100T199
EF100T250
EF100T300
199,999
150,000
199,999
250,000
300,000
265
250
309
364
405
558
450
597
735
836
223
180
239
294
335
159
129
171
210
239
60
100
100
100
100
92.0
99.1
98.5
97.0
92.0
57
77 5/8
77 5/8
77 5/8
77 5/8
28 1/4
28 1/4
28 1/4
28 1/4
28 1/4
5
5
5
5
5
13
13
13
13
13
40
60
60
60
60
42 1/2
62 ½
62 ½
62 ½
62 ½
52 ½
73 1/8
73 1/8
73 1/8
73 1/8
53 ½
74 ¾
74 ¾
74 ¾
74 ¾
1 ½
1 ½
1 ½
1 ½
1 ½
1
1
1
1
1
¾
¾
¾
¾
¾
¾
¾
¾
1
1
570
900
900
900
900
EF100T399 399,999 521 1,127 451 322 100 93.0 77 5/8 28 1/4 5 13 60 62 1/2 73 1/8 73 1/4 1 1/2 1 1 1 950
Recovery LPH
At Degree Rise
DIMENSIONS ( MILLIMETERS)
Model No.
Input
Rate
KW
1st Hr.
Del. LPH
at 56°C
Rise 22°C 56°C 78°C
Stg.
Cap.
Liter
Therm.
Eff.
%
A
Ht.
B
Dia.
C
Flr to
Vent
Outlet
D
Flr to
Inlet
Wtr.
Conn
E
Flr to
T&P
Valve
Conn
F
Fl. to
Outlet
Wtr.
Conn
G
Fl. to Air
Intake
H
Fl. to
Gas
Conn.
Front
Wtr.
Conn.
Dia.
Space
Heating
Conn.
Dia.
Gas
Conn.
Dia.
Relief
Valve
Open.
Shpg.
Wt.
(KG)
EF60T125
EF60T150
EF60T199
EF100T150
EF100T199
EF100T250
EF100T300
36.6
43.9
58.6
43.9
58.6
73.2
87.9
708
799
1003
946
1170
1378
1533
1378
1601
2112
1703
2260
2782
3165
549
640
844
681
905
1113
1268
394
458
602
488
647
795
905
227
227
227
379
379
379
379
96.0
93.0
92.0
99.1
98.5
97.0
92.0
1448
1448
1448
1972
1972
1972
1972
718
718
718
718
718
718
718
127
127
127
127
127
127
127
330
330
330
330
330
330
330
1016
1016
1016
1524
1524
1524
1524
1080
1080
1080
1588
1588
1588
1588
1334
1334
1334
1857
1857
1857
1857
1359
1359
1359
1899
1899
1899
1899
38
38
38
38
38
38
38
25
25
25
25
25
25
25
19
19
19
19
19
19
19
19
19
19
19
19
25
25
259
259
259
408
408
408
408
EF100T399 117.2 1,972 4,266 1,707 1,219 379 93.0 1972 718 127 330 1524 1588 1857 1861 38 25 25 25 431
Table 1. Specifications
5

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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 a lighted ON/OFF switch, which is
illuminated 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 intake and into a venturi, which pulls gas from
the gas valve. The gas and air is then mixed in the combustion blower and sent through the transition tube into the burner.
The Hot Surface Ignition System (HSI) then ignites the gas/air fuel mixture to produce flue products (combustion). The
flame sensor signals the ignition module (described below), that a flame is present.
IGNITION MODULE – The ignition module provides the timing for the combustion system. A sequence of operation (S-
OP) is described in “Section IX - Operating Instruction.” As the combustion system progresses through the S-OP, LED’s
illuminate, allowing accurate trouble-shooting should the need arise. If a failure occurs, the system will “blink” the LED
that corresponds to the failure as described in the “Section XI Troubleshooting Guide.”
ADJUSTABLE THERMOSTAT – 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 may be adjusted from about 80°F to about 180°F. The thermostat was adjusted to 120°F before the water
heater was shipped from the factory. It is recommended that lower temperatures be used to avoid the risk of scalding.
Refer to the “Warnings” and the section on SCALDING in “Section V - Water Connections.” It is further recommended, in
all cases, that the water temperature be set for the lowest temperature, which satisfies your hot water needs. 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 will reduce the risk of scalds. Some states require setting the specific lower
temperatures.
The top immersion well of the single bulb controller also contains the high limit (energy cutoff) sensor. The high limit
switch interrupts the main burner gas flow should the water temperature reach approximately 200°F.
Should the high limit switch activate, it must be manually reset. This can be accomplished by turning the main power
on/off switch to the off position and then back to the on position and allowing the water temperature of the tank to drop
below 160°F.
Contact your qualified installing contractor, service provider or manufacturer listed on the rating plate if continued high
limit switch operation occurs.
SERVICE PANEL – The service panel is located behind the service panel access cover, which is located by the exhaust
elbow near the bottom of the water heater. This panel contains a differential pressure switch that monitors the pressure
across the exhaust orifice. A collector high limit switch is used to monitor the ambient temperature between the first pass
collector and the exhaust collector. This is a manually re-settable switch. If this switch continues to trip, please contact an
authorized service agency.
LATCHES – The latches allow easy access for servicing the water heater from the top. Simply remove the two latches for
servicing and re-latch upon completion. No tools are required to obtain access to the top of the water heater.
6

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TEMPERATURE AND PRESSURE RELIEF VALVE –
pu
s
no
!
CONDENSATE DRAIN - The water heater should either be raised several inches above the floor on a concrete slab or use
a low profile condensate pump to allow free drainage of condensate from the elbow drain fitting. This water heater is a
condensing type unit and requires a drain to be located in close proximity to allow the condensate to drain safely. The
condensate drains from the unit at the exhaust elbow located near the bottom of the unit. The preferred connection to the
drain fitting is to use a ¾" PVC elbow sealed with silicone over the outside of the drain outlet and use ¾" PVC for the drain
trap and condensate line to a drain. Use a thick bead of silicone caulk over the outside of the drain outlet connection before
assembling the elbow. This is preferred over using the threaded tap because the larger drain line will drain more freely and
if too much force is applied to the plastic threads, the fitting may crack and cause a leak. Make sure the condensate drain
line slopes down, away from the water heater at least 1/8" per foot toward the drain. The condensate drain pipe must not be
routed through an area subject to below freezing temperatures. The condensate build-up will block the exhaust outlet,
which will cause improper operation. Refer to Figure 2 for the proper connection of a PVC elbow to the drain outlet and a
condensate trap.
WARNING
Keep clear of the combination temperature and 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 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 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 rating must not be less than the hourly rating of th
water heater
Install the combination temperatu
this
Note: Some models may already be equipped or supplied with an installed 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
co
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 (10.0 cm) be provided
on the side of the w
pressure relief valve.
D
tan
e
re and pressure relief valve into the opening provided and marked for
rpose on the water heater.
with local
de , replace it with one that does. Follow the installation instructions above on this page
ater heater for servicing and maintenance of the combination temperature and
o t place a valve between the combination temperature and pressure relief valve and the
k
7

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Figure 2. Condensate Elbow With Trap
CLEANOUT – All models are equipped with a cleanout opening to aid in removal of hard water deposits from the tank
bottom. If this water heater operates under hard water conditions, the following should be performed at least every 3
months: Turn off water supply and drain the water heater. Remove the cleanout jacket cover and tank cover. When
cleaning the tank, care must be taken to avoid trying to break deposits loose as this could damage the glass lining and
shorten the life of the water heater. After cleaning, re-install the cleanout tank cover and jacket cover, and refill with water.
Refer to the section, “Section X – Maintenance” in this Installation and Operating Instruction manual for the procedures for
filling and draining the water heater.
SACRIFICIAL ANODES – Four 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 consumption. More frequent inspection of the anodes is needed when using
softened (or phosphate treated) water. Contact the installing contractor, or service provider that installed the water heater or
the manufacturer listed on the rating plate for anode replacement information.
POWERED ANODE SYSTEM (399,999 BTU/HR. MODELS ONLY) – Two powered anodes and one magnesium
anode rod are used on models with input ratings of 399,999 Btu/hr. The powered anode system provides corrosion
protection to the tank by supplying a low voltage current to the titanium anode rods and then periodically comparing this
current with the potential between the anode rod and tank wall to make corrections. The powered anode system is designed
to extend the tank life without requiring anode rod replacement. The powered anode system consists of two titanium
powered anode rods located in the front top of the water heater tank and a powered anode control module located on the
right side of the control panel. More details on the powered anode system are in “Section X – Maintenance” in this
Installation and Operating Instruction Manual.
DISHWASHING MACHINE REQUIREMENTS
All dishwashing machines meeting the National Sanitation Foundation requirements 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. Adjust flow by means of the
valve in the circulation line.
8

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SECTION IV: INSTALLATION INSTRUCTIONS
This water heater must be located in an area where leaka
g
e of the tank, water line
connections, or the combination temperature and pressure relief valve will not result in
damage to the area ad
j
acent 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 len
g
th and width of at least four (4) inches (10.0 cm) measured from the
j
acket 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 (2.0 cm) in diameter and pitched for proper drainage.
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 i
n
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 o
f
gas, immediately contact your gas supplier from a telephone in another building.
• Gas detectors are available. Contact your gas supplier or plumbing professional fo
r
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!
INSTALLATION OF THIS WATER HEATER REQUIRES ABILITY EQUIVALENT
TO THAT OF A LICENSED TRADESMAN IN THE FIELD INVOLVED.
PLUMBING, AIR SUPPLY, VENTING, GAS SUPPLY AND ELECTRICAL WOR
K
ARE REQUIRED.
WARNING
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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.
3. Remove all venting components from the combustion assembly compartment by removing the latches.
NOTICE
The vent terminals and the condensate elbow that is supplied with this water heater are stored at the top
in the Combustion Assembly Compartment. To access the vent terminals and condensate elbow,
unlatch the top lid and remove parts. Be sure to replace the top and relatch.
LOCATE WATER HEATER in front of final position before removing crate.
1. LOCATE so that venting connections will be short and direct.
2. THIS WATER HEATER IS SUITABLE FOR INSTALLATION ON COMBUSTIBLE FLOOR. Do not install
this water heater on carpeting.
3. FOR BASEMENT INSTALLATION, provide a solid level elevated base such as concrete or other suitable pad
to raise the water heater at least 3” to provide a slope of 1/8” to ¼” per foot for the condensate line to a suitable
drain.
4. Minimum clearance to combustible material is 0” for the Top, Sides, and Rear of this water heater. However, it
is recommended that at least 18” from the Top, 24” from the Front, 4” for the Left Side and Rear, and 12”
from the Right Side Exhaust Elbow of the water heater be provided for servicing. Clearance for servicing
may be reduced down to minimum clearance to combustible material, but service time and effort may be greatly
increased.
Figure 3a. Minimum Clearance To Combustible Material
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Figure 3b. Recommended Minimum Clearances For Service Access
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.
CAUTION
Do not drop water heater. Do not bump water heater jacket against floor.
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. Place drain pan underneath water
heater
INSTALL TEMPERATURE AND PRESSURE RELIEF VALVE (if not already installed).
WARNING
Temperature and 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.
CAUTION
If the 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.
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DANGER
Temperature setting should not exceed safe temperature at fixtures. See water temperature control
warning on page 16. If higher preheat temperatures are necessary to obtain adequate booster output,
add an anti-scald valve for hot water supplied to fixtures.
LOCATION
KEEP APPLIANCE AREA CLEAR AND FREE OF COMBUSTIBLE MATERIALS, GASOLINE AND OTHER
FLAMMABLE VAPORS AND LIQUIDS.
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 combustion and ventilating air.
2. For safe operation, adequate air is needed for combustion and ventilation. Sooting may result in serious damage to
the water heater and risk of fire or explosion. 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 EXHAUSTING OF ROOM AIR
1. 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 for proper air opening sizing.
UNCONFINED SPACE
1. In buildings of conventional frame, brick or stone construction, unconfined spaces may provide adequate air for
combustion and ventilation.
2. If the unconfined space is within a building of tight construction (buildings using the following construction:
weather stripping, heavy insulation, caulking, vapor barrier, etc.), air for combustion and ventilation must be
obtained from outdoors. This may be accomplished by piping air directly to the water heater from outside or
providing opening or ducts in the wall. The installation instructions for confined spaces in tightly constructed
buildings must be followed to ensure adequate air supply.
CONFINED SPACE
1. When drawing combustion air from inside a conventionally constructed building to a confined space, such a
space shall be provided with two permanent openings.
• The top opening is to be located within twelve (12) inches of the enclosure top and the bottom opening
within twelve (12) inches of the enclosure bottom.
• Each opening shall have a free area of at least one square inch per 1000 Btu/h of the total input of all
appliances in the enclosure, but not less than 100 square inches.
2. If the confined space is within a building of tight construction, air for combustion and ventilation must be
obtained from outdoors. This may be accomplished by piping air directly to the water heater from outside or
providing opening or ducts in the wall. When directly communicating with the outdoors through vertical ducts,
two permanent openings, located in the above manner, shall be provided.
• Each opening shall have a free area of not less than one square inch per 4000 Btu/h of the total input of
all appliances in the enclosure.
• If horizontal ducts are used, each opening shall have a free area of not less than one square inch per 2000
Btu/h of the total input of all appliances in the enclosure.
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3. If the water heater is installed as a direct vent (outside air piped directly to the water heater), then additional
opening, other than the opening for the air intake, are not required. However, adequate ventilation air must be
provided in all cases to prevent increased room temperature.
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, refrigerator and air conditioning refrigerants, swimming pool
chemicals, calcium and sodium chloride, waxes and process chemicals are corrosive. Products of this sort should not
be stored near the water heater or outside by the air intake (if applicable).
TYPICAL INSTALLATION ILLUSTRATION
CAUTION
If the 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.
Figure 4. Typical Front Inlet Connection
Figure 5. Typical Front Inlet Connect with Storage Heater
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Figure 6. Typical Two Water Heater Connection
Figure 7. Typical Three Water Heater Connection
Figure 8. Typical Four Water Heater Connection
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SECTION V: WATER CONNECTIONS
WARNING
Failure to install and maintain a new, listed temperature and pressure relief valve will release the manufacturer from
any claim, which might result from excessive temperature and pressures.
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.
Keep clear of the combination temperature and pressure relief valve discharge line outlet. The discharge may be hot
enough to cause scald injury. The water is under pressure and may splash.
CAUTION
If sweat fittings are to be used, DO NOT apply heat to the nipples in front or side 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.
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 water heater. 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.
2. 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 expansion such as pressure bulges and/or deformities. Your
water supplier or local plumbing inspector should be contacted on how to control this
situation.
Figure 9. Scald
Warning
3. 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.
4. Never operate the water heater without first being certain it is filled with water.
SCALDING
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 the increased temperature water required
by these appliances, you might create the potential for scald injury. 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 local plumbing supplier.
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The following chart details the relationship of water temperature and time with regard to scald injury and may be used as a
guide in determining the safest water temperature for your applications.
Approximate Time/Temperature Scald Chart
APPROXIMATE TIME/TEMPERATURE RELATIONSHIPS IN SCALDS
120°F More than 5 minutes
125°F 1½ to 2 minutes
130°F About 30 seconds
135°F About 10 seconds
140°F Less than 5 seconds
145°F Less than 3 seconds
150°F About 1½ seconds
155°F About 1 second
Table 2.
ALTERNATE SPACE HEATING WATER CONNECTIONS
DANGER
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 non-potable
water heating appliance.
All piping components connected to this water heater for space heating applications must be suitable for use with potable
water.
WARNING
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.
Failure to properly pipe this water heater may result in improper operation and damage to the water heater or structure.
Oxygen contamination of this water heater will cause corrosion of iron and steel components, and can lead to water heater
failure.
Connect the system supply and return piping to
the water heater.
Refer to Figure 10 and Figure 11 for installation
examples. Maintain a minimum ½” clearance
from hot water piping to combustible materials.
Figure 10. Alternate Space Heating
Connections
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Figure 11. Typical Plumbing Schematic for Zoned Heating
SECTION VI: VENTING
WARNING
The vent system must be properly installed. Failure to properly install the vent system could result in property damage, personal
injury, or death.
DO NOT install damaged venting system components. If damage is evident then please contact the supplier where the water
heater was purchased or the manufacturer listed on the rating plate for replacement parts.
Use only the vent terminals provided or factory authorized terminals for venting this water heater.
The water heater requires its own separate venting system. Do not connect the exhaust vent into an existing vent pipe or chimney.
All of the exhaust venting connections must be leak checked with a soap solution upon initial start up of the water heater. Any
leaks must be repaired before continuing operation of the water heater.
Do not terminate the venting where noise from the exhaust or intake will be objectionable. This includes locations close to or
across from windows and doors. Avoid anchoring the vent and intake pipes directly to framed walls, floors, or ceilings unless
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.
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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 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 angling the intake and exhaust away from each
other, increasing the distance between them, relocating the air intake to another side of the building, or using inside air
for combustion.
Check to be sure the intake and exhaust terminals are not obstructed, especially during periods of below freezing
weather.
All intake and exhaust venting components must have the same diameter size. Do not use a different size on the intake
and exhaust venting. For 4” venting, use the supplied 3” vent terminals.
Be sure the condensate runs freely to a drain and does not accumulate inside the water heater. In cold climates,
precautions may need to be taken to insure that the condensate drain does not freeze. Make sure the condensate trap or
drain loop is installed to prevent flue gases from being discharged into the room. Refer to the Venting section of the
Installation and Operating Instructions Manual for complete instructions on venting and condensate drainage.
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.
DO NOT position the air intake above the exhaust terminal.
NEVER locate the air intake where exhaust gases can be introduced.
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.
Provide protection of the building materials from degradation by flue gases from the exhaust vent terminal.
VENTING
The venting instructions must be followed to avoid restricted combustion or recirculation of flue gases. Such conditions
cause sooting or risks of fire and asphyxiation.
This water heater can be installed as either a direct vent system or power vent (air from inside) system. If it is installed as a
direct vent system, then the air intake and the exhaust vent are piped to the outside. If a power vented system is used, then
air is drawn from inside and only the exhaust is piped to the outside. Determine which system is best for your application
and install as described in the following sections.
DIRECT VENT INSTALLATION
Venting may be run horizontally through an outside wall or vertically through a roof through using either 3 inch (7.6 cm) or
4 inch (10.2 cm) diameter PVC, ABS or CPVC pipe. This water heater is supplied with a screened intake and exhaust 90°
elbow referred to as the exhaust vent terminal and the air intake terminal.
NOTICE
If 4 inch PVC, ABS, or CPVC pipe is used, then a use a 4 “ to 3” reducer fitting before exiting the wall or roof to
use the supplied screened intake and exhaust 90° elbows.
Direct Vent Terminal Location
Plan the vent system layout so that proper clearances are maintained from plumbing and wiring. Before the vent is
installed, determine the vent pipe termination location as shown in Figure 12.
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Figure 12a. Vent Terminal Clearances (Other than Direct Vent or “Power Vented” Installations)
Canadian
Installations1
US Installations2Canadian
Installations1
US Installations2
A= Clearance above
grade, veranda,
porch, deck or
balcony
12 inches
(30 cm)
12 inches
(30 cm)
H= Clearance to each side
of center line extended
above meter/regulator
assembly
3 feet (91 cm) within a
height 15 feet (4.6 m)
above the
meter/regulator
assembly
*b
B= Clearance to widow
or door that may be
opened
36 inches
(91 cm)
4 feet (1.2 m)
below or to the
side of opening;
12 inches (30
cm) above
opening
I= Clearance to service
regulator vent outlet or
oil tank vent
36 inches
(91 cm)
*b
C= Clearance to
permanently closed
widow
*b *b J= Clearance to non-
mechanical air supply
inlet to building or the
combustion air inlet to
any other appliance
36 inches
(91 cm)
4 feet (1.2m)
below or to side
of opening; 12
inches (30 cm)
above opening.
D= Vertical clearance to
ventilated soffit
located above the
terminal within a
horizontal distance of
2 feet (61 cm) from
the center line of the
terminal
*b *b K= Clearance to a
mechanical air supply
inlet
6 feet
(1.83 m)
3 feet (91 cm)
above if within
10 feet
horizontally
E= Clearance to
unventilated soffit
*b *b L= Clearance above paved
sidewalk or paved
driveway located on
public property
7 feet
(2.13 m)†
7 feet
(2.13 m)†
F= Clearance to outside
corner
*b *b M= Clearance under a
veranda, porch, deck, or
balcony
12 inches (30 cm) ‡ *b
G= Clearance to inside
corner
36 inches
(91 cm)*a
36 inches
(91 cm)*a
1 In accordance with the current CAN/CGA-B149 Installation Codes.
2 In accordance with the current ANSI Z223.1-(Latest Edition)/NFPA 54 National Fuel Gas Code.
†A vent shall not terminate 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 accordance with section 2.20.
*b) “Clearance in accordance with local installation codes and the requirements of the gas supplier”.
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Figure 12b. Direct Vent Terminal Clearances
Canadian
Installations1
US
Installations2
Canadian
Installations1
US Installations2
A= Clearance above grade,
veranda, porch, deck or
balcony
12 inches (30
cm)
12 inches
(30 cm)
H= Clearance to each side
of center line extended
above meter/regulator
assembly
3 feet (91 cm) within a
height 15 feet (4.6 m)
above the
meter/regulator
assembly
*b
B= Clearance to widow or
door that may be opened
36 inches (91
cm)
12 inches
(30 cm)
I= Clearance to service
regulator vent outlet or
oil tank vent
36 inches
(91 cm)
*b
C= Clearance to
permanently closed
widow
*b *b J= Clearance to non-
mechanical air supply
inlet to building or the
combustion air inlet to
any other appliance
36 inches
(91 cm)
12 inches
(30 cm)
D= Vertical clearance to
ventilated soffit located
above the terminal within
a horizontal distance of 2
feet (61 cm) from the
center line of the
terminal
12 inches
(30 cm) *a
12 inches
(30 cm) *a
K= Clearance to a
mechanical air supply
inlet
6 feet
(1.83 m)
3 feet (91 cm)
above if within
10 feet
horizontally
E= Clearance to
unventilated soffit
12 inches
(30 cm) *a
12 inches
(30 cm) *a
L= Clearance above paved
sidewalk or paved
driveway located on
public property
7 feet
(2.13 m)†
*b
F= Clearance to outside
corner
*b *b M= Clearance under a
veranda, porch, deck, or
balcony
12 inches (30 cm) ‡ *b
G= Clearance to inside
corner
36 inches
(91 cm)*a
36 inches
(91 cm)*a
1 In accordance with the current CAN/CGA-B149 Installation Codes.
2 In accordance with the current ANSI Z223.1-(Latest Edition)/NFPA 54 National Fuel Gas Code.
†A vent shall not terminate 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 accordance with section 2.20.
*b) “Clearance in accordance with local installation codes and the requirements of the gas supplier”.
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