COMMERCIAL GAS WATER HEATERS Instruction Manual MODELS BTR 500

COMMERCIAL GAS WATER HEATERS Instruction Manual MODELS BTR 500
Instruction Manual
COMMERCIAL GAS WATER HEATERS
MODELS BTR 500
SERIES 120/121
INSTALLATION - OPERATION - SERVICE
- MAINTENANCE - LIMITED WARRANTY
ANSI / NSF 5
ASME CRN
WARNING: If the information in these
instructions is not followed exactly, a fire
or explosion may result causing property
damage, personal injury or death.
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS:
‡ Do not try to light any appliance.
‡ Do not
touch any electrical switch; do
not use any phone in your building.
‡ Immediately
call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions.
‡ If you cannot
reach your gas supplier,
call the fire department.
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
Read and understand this instruction
manual and the safety messages
herein before installing, operating or
servicing this water heater.
Failure to follow these instructions and
safety messages could result in death
or serious injury.
Thank you for buying this energy efficient water heater.
We appreciate your confidence in our products.
This manual must remain with the
water heater.
PLACE THESE INSTRUCTIONS ADJACENT TO HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.
PRINTED IN THE U.S.A. 0510
318230-000
TABLE OF CONTENTS
SAFE INSTALLATION, USE AND SERVICE.......................................... 3
Water Line Connections .................................................................. 19
GENERAL SAFETY INFORMATION................................................... 4-5
Water (Potable) Heating and Space Heating............................................19
Precautions ........................................................................................ 4
Thermometer (Not Supplied) ....................................................................19
Water Piping Diagrams .............................................................................19
INTRODUCTION .................................................................................... 6
T&P Valve Discharge Pipe............................................................... 19
Qualifications ..................................................................................... 6
Installation Diagrams ....................................................................... 20
FEATURES AND COMPONENTS ......................................................... 7
Code Restrictions ............................................................................ 20
The Eliminator (Self Cleaning System) .............................................. 7
Heater Wiring ................................................................................... 21
High Limit Switch ............................................................................... 7
Gas Piping ....................................................................................... 22
Electronic Ignition Control .................................................................. 7
Purging ............................................................................................ 22
Exhaust Inducer (blower Assy.) ......................................................... 7
Gas Pressure Regulator .................................................................. 22
Uncrating ........................................................................................... 7
OPERATION......................................................................................... 23
INSTALLATION CONSIDERATIONS ................................................ 8-11
General ............................................................................................ 23
Rough In Dimensions ........................................................................ 8
Filling ............................................................................................... 23
Recovery Capacities .......................................................................... 8
Adjustments ..................................................................................... 23
Gas and Electrical Characteristics ..................................................... 8
SEQUENCE OF OPERATION ............................................................. 23
Locating The Water Heater ................................................................ 9
Lighting & Operation Label .............................................................. 24
Leveling ............................................................................................. 9
Checking Venting ............................................................................. 25
Clearances ........................................................................................ 9
Checking the Igniter Assembly ........................................................ 25
Installation on Combustible Flooring ............................................... 10
Igniter Assembly .............................................................................. 25
Insulation Blanket ............................................................................ 10
Main Burner ..................................................................................... 25
Hard Water ...................................................................................... 10
Gas Valves....................................................................................... 25
Circulation Pumps ...................................................................... 10-11
Checking the Input ........................................................................... 26
INSTALLATION REQUIREMENTS ................................................. 11-14
MAINTENANCE ................................................................................... 26
Supply Gas Regulator ......................................................................11
Venting System ................................................................................ 26
Power Supply ...................................................................................11
Remote Storage Tank Temperature Control .................................... 26
Mixing Valves ....................................................................................11
Temperature-Pressure Relief Valve Test ......................................... 26
Dishwashing Machines .................................................................... 12
Hot Water Odor................................................................................ 27
Closed Water Systems .................................................................... 12
Anode Rod Inspection ..................................................................... 27
Thermal Expansion .......................................................................... 12
Draining and Flushing ...................................................................... 27
Temperature-Pressure Relief Valve ............................................ 12-13
To Drain the Water Heater Storage Tank ..................................................27
Contaminated Air ............................................................................. 13
To Flush the Water Heater Storage Tank..................................................27
Air Requirements ............................................................................. 13
Unconfined Space ........................................................................... 14
Recommended Procedure for Periodic Removal or Lime Deposits
from the Tank Type\ Commercial Water Heaters ............................. 28
Confined Space ............................................................................... 14
DeLiming Solvents ........................................................................... 28
Exhaust Fans............................................................................................14
Tank Cleanout Procedure ........................................................... 28-29
Louvers and Grilles...................................................................................14
Ignition Module System ................................................................... 29
Vent Reducer ................................................................................... 14
SERVICE .............................................................................................. 29
VENTING INSTALLATION .............................................................. 14-18
Electrical Servicing .......................................................................... 29
Venting ............................................................................................. 14
FOR YOUR INFORMATION ................................................................. 30
Multiple Heater Manifold .................................................................. 15
Start up Conditions .......................................................................... 30
Fresh Air Opening for Confined Spaces .......................................... 15
Operational Conditions .................................................................... 30
Outdoor Air Through Two Openings ................................................ 15
"Air" in the Water Faucets.........................................................................30
Outdoor Air Through One Opening .................................................. 15
High Water Temperature Shut off System ................................................30
Outdoor Air Through Two Horizontal Ducts ..................................... 15
Sequence of Operation Flow Chart ................................................. 31
Outdoor Air Through Two Vertical Ducts.......................................... 16
Operational Checklist ...................................................................... 32
Air From Other Indoor Spaces ......................................................... 16
WATER PIPING DIAGRAMS........................................................... 33-47
Technical Data Venting ............................................................... 17-18
WARRANTY ......................................................................................... 48
WATER HEATER INSTALLATION................................................... 19-22
2
SAFE INSTALLATION, USE AND SERVICE
The proper installation, use and servicing of this water heater is extremely important to your safety and the safety of others.
Many safety-related messages and instructions have been provided in this manual and on your own water heater to warn you and
others of a potential injury hazard. Read and obey all safety messages and instructions throughout this manual. It is very important
that the meaning of each safety message is understood by you and others who install, use, or service this water heater.
This is the safety alert symbol. It is used to alert you to
potential personal injury hazards. Obey all safety
messages that follow this symbol to avoid possible
injury or death.
DANGER
DANGER indicates an imminently
hazardous situation which, if not avoided,
will result in injury or death.
WARNING
WARNING indicates a potentially hazardous
situation which, if not avoided, could result
in injury or death.
CAUTION
CAUTION indicates a potentially hazardous
situation which, if not avoided, could result in
minor or moderate injury.
CAUTION
CAUTION used without the safety alert
symbol indicates a potentially hazardous
situation which, if not avoided, could result in
property damage.
All safety messages will generally tell you about the type of hazard, what can happen if you do not follow the safety message, and
how to avoid the risk of injury.
The California Safe Drinking Water and Toxic Enforcement Act requires the Governor of California to publish a list of substances
known to the State of California to cause cancer, birth defects, or other reproductive harm, and requires businesses to warn of
potential exposure to such substances.
This product contains a chemical known to the State of California to cause cancer, birth defects, or other reproductive harm. This
appliance can cause low level exposure to some of the substances listed in the Act.
APPROVALS
ASME CRN
ANSI / NSF 5
3
GENERAL SAFETY INFORMATION
Fire or Explosion Hazard
Fire Hazard
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
For continued protection against
risk of fire:
Avoid all ignition sources if you smell gas.
Do not expose water heater controls to excessive gas
pressure.
Do not install water heater on
carpeted floor.
Do not operate water heater if
flood damaged.
Use only the gas shown on the water heater rating label.
Maintain required clearances to combustibles.
Keep ignition sources away from faucets after extended
periods of non-use.
Fire and Explosion Hazard
Read instruction manual before
installing, using or servicing
water heater.
Use joint compound or Teflon tape
compatible with propane gas.
Leak test before placing the
water heater in operation.
Disconnect gas piping and main
gas shutoff valve before leak
testing.
Install sediment trap in
accordance with NFPA 54.
Breathing Hazard - Carbon Monoxide Gas
Do not obstruct water heater air intake
with insulating blanket.
Gas and carbon monoxide detectors
are available.
Fire and Explosion Hazard
Install water heater in accordance with
the instruction manual.
Do not use water heater with any gas
other than the gas shown on the rating
label.
Excessive gas pressure to gas valve can
cause serious injury or death.
Turn off gas lines during installation.
Contact a qualified installer or service
agency for installation and service.
Breathing carbon monoxide can cause brain damage or
death. Always read and understand instruction manual.
CAUTION
Property Damage Hazard
• All water heaters eventually leak.
• Do not install without adequate drainage.
Jumping out control circuits or components can
result in property damage, personal injury or death.
Electrical Shock Hazard
•
Turn off power to the water heater
before performing any service.
•
Label all wires prior to disconnecting
when performing service. Wiring errors
can cause improper and dangerous
operation.
•
•
Verify proper operation after servicing.
•
Service should only be performed by a qualified service
agent using proper test equipment.
•
Altering the water heater controls and/or wiring in any way
could result in permanent damage to the controls or water
heater and is not covered under the limited warranty.
Altering the water heater controls and/or wiring in any way
could result in altering the ignition sequence allowing gas to
flow to the main burner before the hot surface igniter is at
ignition temperature causing delayed ignition which can
cause a fire or explosion.
•
Any bypass or alteration of the water
heater controls and/or wiring will result
in voiding the appliance warranty.
Failure to follow these instructions can
result in personal injury or death.
4
GENERAL SAFETY INFORMATION
Read and understand this instruction
manual and the safety messages
herein before installing, operating or
servicing this water heater.
Explosion Hazard
Overheated water can cause
water tank explosion.
Failure to follow these instructions and
safety messages could result in death
or serious injury.
Properly sized temperature and
pressure relief valve must be
installed in the opening provided.
This manual must remain with the
water heater.
Water temperature over 125°F (52°C)
can cause severe burns instantly
resulting in severe injury or death.
CAUTION
Improper installation, use and service may result
in property damage.
Children, the elderly and the
physically or mentally disabled are at
highest risk for scald injury.
•
•
•
•
•
Feel water before bathing or
showering.
Temperature limiting devices such as
mixing valves must be installed
when required by codes and to
ensure safe temperatures at fixtures.
Do not operate water heater if flood damaged.
Inspect and anode rods regularly, replace if damaged.
Install in location with drainage.
Fill tank with water before operation.
Properly sized thermal expansion tanks are required on all
closed water systems.
Refer to this manual for installation and service.
Verify the power to the water heater is turned off before performing any service procedures.
GENERAL SAFETY INFORMATION
PRECAUTIONS
HYDROGEN GAS FLAMMABLE
DO NOT USE THIS APPLIANCE IF ANY PART HAS BEEN
UNDER WATER. Immediately call a qualified service agency
to inspect the appliance and to make a determination on what
steps should be taken next.
If the unit is exposed to the following, do not operate heater
until all corrective steps have been made by a qualified
service agency.
Explosion Hazard
Flammable hydrogen gases
may be present.
1. External fire.
Keep all ignition sources away
from faucet when turning on
hot water.
2. Damage.
3. Firing without water.
GROUNDING INSTRUCTIONS
This water heater must be grounded in accordance with the
National Electrical Code and/or local codes. These must be
followed in all cases.
Hydrogen gas can be produced in a hot water system served
by this appliance that has not been used for a long period of
time (generally two weeks or more). Hydrogen gas is extremely
flammable. To reduce the risk of injury under these conditions, it
is recommended that a hot water faucet served by this appliance
be opened for several minutes before using any electrical
appliance connected to the hot water system. If hydrogen is
present there will probably be an unusual sound such as air
escaping through the pipe as the water begins to flow. THERE
SHOULD BE NO SMOKING OR OPEN FLAME NEAR THE
FAUCET AT THE TIME IT IS OPEN.
This water heater must be connected to a grounded metal,
permanent wiring system; or an equipment grounding conductor
must be run with the circuit conductors and connected to the
equipment grounding terminal or lead on the water heater, see
Figure 20.
5
INTRODUCTION
Thank You for purchasing this water heater. Properly installed
and maintained, it should give you years of trouble free service.
below) in the field involved. Installation skills such as plumbing,
air supply, venting, gas supply and electrical supply are required
in addition to electrical testing skills when performing service.
ABBREVIATIONS USED
ANSI Z223.1 2006 Sec. 3.3.83: “Qualified Agency” - “Any
individual, firm, corporation or company that either in person or
through a representative is engaged in and is responsible for (a)
the installation, testing or replacement of gas piping or (b) the
connection, installation, testing, repair or servicing of appliances
and equipment; that is experienced in such work; that is familiar
with all precautions required; and that has complied with all the
requirements of the authority having jurisdiction.”
Abbreviations found in this Instruction Manual include :
•
•
•
•
•
•
•
ANSI - American National Standards Institute
ASME - American Society of Mechanical Engineers
GAMA - Gas Appliance Manufacturer’s Association
NEC - National Electrical Code
NFPA - National Fire Protection Association
UL - Underwriters Laboratory
CSA - Canadian Standards Association
If you are not qualified (as defined by ANSI above) and licensed
or certified as required by the authority having jurisdiction
to perform a given task do not attempt to perform any of the
procedures described in this manual. If you do not understand
the instructions given in this manual do not attempt to perform
any procedures outlined in this manual.
QUALIFICATIONS
QUALIFIED INSTALLER OR SERVICE AGENCY
Installation and service of this water heater requires ability
equivalent to that of a Qualified Agency (as defined by ANSI
6
FEATURES AND COMPONENTS
THE ELIMINATOR (SELF-CLEANING SYSTEM)
ELECTRONIC IGNITION CONTROL
These units include The Eliminator (Self-Cleaning System)
installed in the front water inlet, See Figure 1. The Eliminator
must be oriented correctly for proper function. There is a marked
range on the pipe nipple portion of the Eliminator, that must be
aligned with the top of the inlet spud. A label above the jacket
hole has an arrow that will point to the marked portion of the pipe
nipple if the orientation is correct. If the arrow does not point
within the marked range on the pipe nipple, adjust the pipe nipple
to correct. A pipe union is supplied with the Eliminator to reduce
the probability of misaligning the Eliminator accidentally while
tightening the connection to the inlet water supply line. Improper
orientation of the Eliminator can cause poor performance of the
heater and can significantly reduce outlet water temperatures
during heavy draws.
Each heater is equipped with a ignition module. The solid sate
ignition control (Figure 3), ignites the main burner by utilizing a
silicone nitride ignitor. The silicone nitride ignitor shuts off during
the heating cycle and the main burner flame is sensed through
a remote flame sensor integral to the silicone nitride ignitor
assembly.
The ignition control will try to ignite the main burner three times
before lockout. Then it waits one hour before trying again to ignite
the main burners. This is a continuous cycle.
Note: The inlet tube may have 1, 3 or 7 cross tubes.
FIGURE 1
For proper function, the Eliminator must be oriented correctly.
There is a marked range on the pipe nipple that must be aligned
with the top of the inlet spud (check for label on the appliance)
to assure proper operation. Please check to confirm that
the marked range is in alignment with the top of the spud. A
pipe union is supplied with the Eliminator to help eliminate
the possibility of changing the orientation by accidentally
overtightening the inlet supply. Improper orientation of the
Eliminator may cause temperature buildup issues or spells of
colder than usual water temperatures.
IGNITION CONTROL BOARD
FIGURE 3
EXHAUST INDUCER (BLOWER ASSY.)
The BTR 500 models are equipped with an exhaust inducer. The
inducer assists in drawing in fresh air to the unit for combustion
and then assists in dispensing the combustion by-products into
the venting leading outside.
The exhaust inducer is equipped with a gravity controlled damper
to reduce the amount of heat loss through the flue, improving
efficiency.
HIGH LIMIT SWITCH
The digital thermostat (Figure 2) contains the high limit (energy
cutoff) sensor. The high limit switch interrupts main burner gas
flow should the water temperature reach 203°F (95°C).
In the event of high limit switch operation, the appliance cannot be
restarted unless the water temperature is reduced to approximately
120°F (49°C). The high limit reset button on the front of the control
then needs to be depressed.
Continued manual resetting of high limit control, preceded by
higher than usual water temperature is evidence of high limit
switch operation. The following is a possible reason for high limit
switch operation:
• A malfunction in the thermostatic controls would allow the gas
valve to remain open causing water temperature to exceed the
thermostat setting. The water temperature would continue to
rise until high limit switch operation.
Contact your dealer or service agent if continued high limit switch
operation occurs.
EXHAUST INDUCER
FIGURE 4
FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN
SERIOUS PERSONAL INJURY OR DEATH.
UNCRATING
The heater is shipped with the inducer already installed. The
wiring conduit runs from the thermostat to the inducer. Before
turning unit on, check to make sure the wiring conduit is securely
plugged into the inducer.
DIGITAL THERMOSTAT
FIGURE 2
7
INSTALLATION CONSIDERATIONS
ROUGH IN DIMENSIONS
FRONT VIEW
BACK VIEW
TOP
OUTLET
1 1/2” NPT
TOP
INLET
1 1/2” NPT
F
TOP VIEW
FIGURE 5
TABLE 1. ROUGH-IN-DIMENSIONS
Connections
Inlet (NPT)
Outlet (NPT)
Top Front Back Top Front Back
Dimensions in Inches/cm
Model
BTR 500
BTR500
Input Rate
Btu/Hr
Kw/Hr
500,000
147
Approximate
Tank Cap
G/L
85
322
A
B
C
D
E
F
81.50 17.50 77.25 67.50 27.13 21.00
207
44
196
171
69
53
Gas
Inlet
G
1.00
3
H
67.50
171
Vent
Dia
I
8.00
20
J
27.75
70
1.50
1.50
1.50
1.50
1.50
1.50
1.50
1.50
1.50
1.50
1.50
1.50
Approx. Ship Weight
Std.
Lbs/
Kgs.
745
338
ASME
Lbs/
Kgs.
857
389
TABLE 2. RECOVERY CAPACITIES, based on 80% efficiency
Model
BTR 500
BTR 500
Input Rate
Btu/Hr
Kw/Hr
500,000
147
Approximate
Tank Cap
G/L
85
322
30°F
(-1)°C
1616
6118
40°F
4°C
1212
4588
50°F
10°C
970
3671
Recovery Rating Capacities (GPH and LPH)
70°F
80°F
90°F
100°F
21°C
27°C
32°C
38°C
693
606
539
485
2622
2294
2039
1835
60°F
15°C
808
3059
110°F
43°C
441
1668
120°F
49°C
404
1529
130°F
54°C
373
1412
TABLE 3. GAS AND ELECTRICAL CHARACTERISTICS
Model
BTR 500
BTR 500
Type of Gas
Natural
Propane
Inches of W.C.
3.50"
10.00"
kPA
0.87
2.48
8
Volts/Hz
120/60
120/60
Amperes
<5
<5
140°F
60°C
346
1311
INSTALLATION CONSIDERATIONS
LOCATING THE WATER HEATER
THE HEATER MUST NOT BE LOCATED IN AN AREA WHERE
IT WILL BE SUBJECT TO FREEZING.
LOCATE IT NEAR A FLOOR DRAIN. THE HEATER SHOULD
BE LOCATED IN AN AREA WHERE LEAKAGE FROM THE
HEATER OR CONNECTIONS WILL NOT RESULT IN DAMAGE
TO THE ADJACENT AREA OR TO LOWER FLOORS OF THE
STRUCTURE.
CAUTION
Property Damage Hazard
• All water heaters eventually leak.
WHEN SUCH LOCATIONS CANNOT BE AVOIDED, A SUITABLE
DRAIN PAN SHOULD BE INSTALLED UNDER THE HEATER.
Such pans should be fabricated with sides at least 2” deep, with
length and width at least 2” greater than the diameter of the heater
and must be piped to an adequate drain. The pan must not restrict
combustion air flow.
• Do not install without adequate drainage.
When installing the heater, consideration must be given to proper
location. Location selected should be as close to the stack or chimney
as practicable, with adequate air supply and as centralized with the piping
system as possible.
LEVELING
If the unit is not level, insert the bolts which were used in crating
into the legs to correct this condition.
CLEARANCES
Fire or Explosion Hazard
This water heater is approved for installation on combustible
flooring (with Installation on Combustible Flooring #9003425205)
in an alcove when the minimum clearance from any combustion
construction are followed as indicated in Figure 7 and Table 4.
In all installations the minimum combustible clearances from
vent piping shall be 6” (152mm). Vent piping passing through a
combustible wall or ceiling must be a continuous run (no joints)
and retain the 6” (152mm) clearance unless an approved reducing
thimble is used.
A service clearance of 24” (610mm) should be maintained from
serviceable parts, such as relief valves, flue baffles, thermostats,
cleanout openings or drain valves.
The units are approved for installation with side, rear and ceiling
clearances as indicated below:
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
Avoid all ignition sources if you smell gas.
Do not expose water heater controls to excessive gas
pressure.
Use only the gas shown on the water heater rating label.
Maintain required clearances to combustibles.
Keep ignition sources away from faucets after extended
periods of non-use.
Read instruction manual before
installing, using or servicing
water heater.
TABLE 4
MINIMUM CLEARANCES TO COMBUSTIBLES IN INCHES (mm)
THERE IS A RISK IN USING FUEL BURNING APPLIANCES SUCH AS
GAS WATER HEATERS IN ROOMS, GARAGES OR OTHER AREAS
WHERE GASOLINE, OTHER FLAMMABLE LIQUIDS OR ENGINE
DRIVEN EQUIPMENT OR VEHICLES ARE STORED, OPERATED OR
REPAIRED. FLAMMABLE VAPORS ARE HEAVY AND TRAVEL ALONG
THE FLOOR AND MAY BE IGNITED BY THE HEATER’S PILOT OR MAIN
BURNER FLAMES CAUSING FIRE OR EXPLOSION. SOME LOCAL
CODES PERMIT OPERATION OF GAS APPLIANCES IN SUCH AREAS
IF THEY ARE INSTALLED 18” OR MORE ABOVE THE FLOOR. THIS
MAY REDUCE THE RISK IF LOCATION IN SUCH AN AREA CANNOT
BE AVOIDED.
"A"
"B"
RIGHT
LEFT
"C"
"D"
MODEL
SIDE
SIDE
BACK
CEILING
BTR 500
5"
(12.7 mm)
5"
(12.7 mm)
5"
(12.7 mm)
20"
(508mm)
TABLE 5
MINIMUM CLEARANCES TO NONCOMBUSTIBLE CONSTRUCTION
DO NOT INSTALL THIS WATER HEATER DIRECTLY ON A CARPETED
FLOOR. A FIRE HAZARD MAY RESULT. Instead the water heater must
be placed on a metal or wood panel extending beyond the full width and
depth by at least 3 inches in any direction. If the heater is installed in a
carpeted alcove, the entire floor shall be covered by the panel. Also, see
the DRAINING requirements in MAINTENANCE Section.
THE HEATER SHALL BE LOCATED OR PROTECTED SO IT IS NOT
SUBJECT TO PHYSICAL DAMAGE BY A MOVING VEHICLE.
FLAMMABLE ITEMS, PRESSURIZED CONTAINERS OR ANY
OTHER POTENTIAL FIRE HAZARDOUS ARTICLES MUST
NEVER BE PLACED ON OR ADJACENT TO THE HEATER.
OPEN CONTAINERS OR FLAMMABLE MATERIAL SHOULD
NOT BE STORED OR USED IN THE SAME ROOM WITH THE
HEATER.
9
"A"
"B"
RIGHT
LEFT
"C"
"D"
MODEL
SIDE
SIDE
BACK
CEILING
BTR 500
0
0
0
12"
(305 mm)
INSULATION BLANKET
Breathing Hazard - Carbon Monoxide Gas
Do not obstruct water heater air intake
with insulating blanket.
Gas and carbon monoxide detectors
are available.
Install water heater in accordance with
the instruction manual.
Breathing carbon monoxide can cause brain damage or
death. Always read and understand instruction manual.
Insulation blankets are available to the general public for external
use on gas water heaters but are not necessary with these
products. The purpose of an insulation blanket is to reduce the
standby heat loss encountered with storage tank heaters. The
water heaters covered by this manual meet or exceed the Energy
Policy Act standards with respect to insulation and standby heat
loss requirements, making an insulation blanket unnecessary.
Should you choose to apply an insulation blanket to this
heater, you should follow these instructions. See the Features
and Components section of this manual for identification of
components mentioned below. Failure to follow these instructions
can restrict the air flow required for proper combustion, potentially
resulting in fire, asphyxiation, serious personal injury or death.
•
DO NOT apply insulation to the top of the water heater, as
this will interfere with safe operation of the draft hood.
•
DO NOT cover the gas valve, thermostat or the TemperaturePressure Relief Valve.
•
DO NOT allow insulation to come within 2” (5 cm) of the
burners, to prevent blockage of combustion air flow to the
burners.
•
DO NOT allow insulation to come within 9 inches (23 cm)
of floor, (within 2 inches (5 cm) of bottom cover) to prevent
blockage of combustion air flow to the burners..
•
DO NOT cover the instruction manual. Keep it on the side of
the water heater or nearby for future reference.
•
DO obtain new warning and instruction labels from the
manufacturer for placement on the blanket directly over the
existing labels.
•
DO inspect the insulation blanket frequently to make certain
it does not sag, thereby obstructing combustion air flow.
.
FIGURE 6
INSTALLATION ON COMBUSTIBLE FLOORING
The BTR 500 is approved for installations on combustible
flooring when installed with leg kit number 9003425205
HARD WATER
Where hard water conditions exist, water softening or the
threshold type of water treatment is recommended. This will
protect the dishwashers, coffee urns, water heaters, water piping
and other equipment.
See the Maintenance Section in this manual for sediment and
lime scale removal procedures.
CIRCULATION PUMPS
FIGURE 7
1.
Unit needs to be lifted in a way not to damage unit or laid
on it’s side to access the bottom of the legs.
2.
Slide leg extension under leg and the bolt up through the
bottom hole located in the bottom of the leg.
3.
Once in place, screw nut down and secure.
4.
Front of leg should line up with front of leg extension as
shown to make sure weight of unit is distributed through the
leg extension.
A circulating pump is used when a system requires a circulating
loop or there is a storage tank used in conjunction with the water
heater. See Water Piping Diagrams in this manual for installation
location of circulating pumps.
See the Circulation Pump Wiring Diagrams in this manual for
electrical hookup information. Install in accordance with the
current edition of the National Electrical Code, NFPA 70 or the
Canadian Electrical Code, CSA C22.1.
All-bronze circulators are recommended for used with commercial
water heaters.
10
Some circulating pumps are manufactured with sealed bearings
and do not require further lubrication. Some circulating pumps
must be periodically oiled. Refer to the pump manufacturer’s
instructions for lubrication requirements.
CIRCULATING PUMP WIRING DIAGRAM
DISHWASHER LOOP WITH TOGGLE SWITCH
CIRCULATING PUMP WIRING DIAGRAM
STORAGE TANK OR BUILDING RECIRCULATION
NOTE: USE SEPARATE 120 VAC POWER
SUPPLY FOR PUMP CIRCUIT. DO NOT
SHARE POWER WITH APPLIANCE AS THIS
MAY CAUSE ELECTRICAL LINE NOISE AND
LEAD TO ERRATIC CONTROL SYSTEM
OPERATION.
DISHWASHER
TOGGLE
SWITCH
FIELD SUPPLIED TEMPERATURE CONTROL
INSTALLED IN THE STORAGE TANK
OR CIRCULATING LOOP RETURN LINE
FIELD SUPPLIED TEMPERATURE
CONTROL INSTALLED IN THE
CIRCULATING LOOP RETURN LINE
NOTE: USE SEPARATE 120 VAC POWER
SUPPLY FOR PUMP CIRCUIT. DO NOT
SHARE POWER WITH APPLIANCE AS THIS
MAY CAUSE ELECTRICAL LINE NOISE AND
LEAD TO ERRATIC CONTROL SYSTEM
OPERATION.
L1 HOT
L1 HOT
120 VAC
POWER
120 VAC
POWER
CIRC
PUMP
MOTOR
CIRC
PUMP
MOTOR
L2 NEUTRAL
L2 NEUTRAL
FIGURE 8
FIGURE 9
INSTALLATION REQUIREMENTS
Water heated to a temperature which will satisfy clothes washing,
dish washing, and other sanitizing needs can scald and cause
permanent injury upon contact. Short repeated heating cycles
caused by small hot water uses can cause temperatures at the
point of use to exceed the water heater’s temperature setting by
up to 20°F (11°C).
SUPPLY GAS REGULATOR
The water heater covered by this manual requires a supply gas
regulator to be installed in the supply gas line serving the water
heater for proper operation. Supply gas regulators are required
on high and low pressure gas supply systems.
Some people are more likely to be permanently injured by
hot water than others. These include the elderly, children, the
infirm and the physically/mentally disabled. Table 6 shows the
approximate time-to-burn relationship for normal adult skin.
If anyone using hot water provided by the water heater being
installed fits into one of these groups or if there is a local code
or state law requiring a certain water temperature at the point of
use, then special precautions must be taken.
NOTE: On multiple water heater installations each water heater
shall have its own dedicated supply gas regulator installed in the
supply gas line serving the water heater.
Supply gas regulators must be rated at or above the input Btu/
hr rating of the water heater they supply. Supply gas regulators
shall have inlet and outlet connections not less than the minimum
supply gas line size for the water heater they serve as shown in
Table 5. The Maxitrol 325-7L or equivalent is recommended.
In addition to using the lowest possible temperature setting that
satisfies the demand of the application a Mixing Valve should be
installed at the water heater (see Figure 10) or at the hot water
taps to further reduce system water temperature.
See Supply Gas Regulator Installation on page 11.
POWER SUPPLY
The water heaters covered in this manual require a 120 VAC,
1Ø (single phase), 60Hz, 15 amp power supply and must also
be electrically grounded in accordance with local codes or, in the
absence of local codes, with the National Electrical Code, ANSI/
NFPA 70 or the Canadian Electrical Code, CSA C22.1.
Mixing valves are available at plumbing supply stores. Consult
a Qualified Installer or Service Agency. Follow mixing valve
manufacturer’s instructions for installation of the valves.
TABLE 6
MIXING VALVES
Water Temperature
Water temperature over 125°F (52°C)
can cause severe burns instantly
resulting in severe injury or death.
Children, the elderly and the
physically or mentally disabled are at
highest risk for scald injury.
Feel water before bathing or
showering.
Temperature limiting devices such as
mixing valves must be installed
when required by codes and to
ensure safe temperatures at fixtures.
11
Time to Produce 2nd & 3rd
Degree Burns on Adult Skin
180°F (82°C)
Nearly instantaneous
170°F (77°C)
Nearly instantaneous
160°F (71°C)
About 1/2 second
150°F (66°C)
About 1-1/2 seconds
140°F (60°C)
Less than 5 seconds
130°F (54°C)
About 30 seconds
120°F (49°C)
More than 5 minutes
DISHWASHING MACHINES
A properly sized thermal expansion tank must be installed on
all closed systems to control the harmful effects of thermal
expansion. Contact a local plumbing service agency to have a
thermal expansion tank installed.
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 (103 kPa
and 173 kPa). Flow pressures above 25 pounds per square inch
(173 kPa), or below 15 pounds per square inch (103 kPa), will
result in improperly sanitized dishes. Where pressures are high,
a water pressure reducing or flow regulating control valve should
be used in the 180°F (82°C) line to the dishwashing machine
and should be adjusted to deliver water pressure between these
limits.
See Water Line Connections on page 19 and the Water Piping
Diagrams beginning on page 33.
TEMPERATURE-PRESSURE RELIEF VALVE
Explosion Hazard
HOT WATER
OUTLET
Temperature-Pressure Relief Valve
must comply with ANSI Z21.22CSA 4.4 and ASME code.
12” TO 15”
(30-38 cm)
Properly sized temperaturepressure relief valve must be
installed in opening provided.
TEMPERED WATER
OUTLET
Can result in overheating and
excessive tank pressure.
CHECK
VALVE
COLD
WATER
INLET
CHECK
VALVE
Can cause serious injury or death.
MIXING
VALVE
This water heater is provided with a properly rated/sized and
certified combination Temperature-Pressure Relief Valve (T&P
valve) by the manufacturer. The valve is certified by a nationally
recognized testing laboratory that maintains periodic inspection
of production of listed equipment of materials as meeting the
requirements for Relief Valves for Hot Water Supply Systems,
ANSI Z21.22 • CSA 4.4, and the code requirements of ASME.
TO TANK
INLET
Figure 10
The National Sanitation Foundation also recommends circulation
of 180°F (82°C) 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 (82°C) water at the point of take-off to
the dishwashing machine.
If replaced, the new T&P valve must meet the requirements
of local codes, but not less than a combination TemperaturePressure Relief Valve rated/sized and certified as indicated in
the above paragraph. The new valve must be marked with a
maximum set pressure not to exceed the marked hydrostatic
working pressure of the water heater (150 psi = 1,035 kPa) and
a discharge capacity not less than the water heater Btu/hr or kW
input rate as shown on the water heater’s model rating label.
Adjust flow by throttling a full port ball valve installed in the
circulating line on the outlet side of the pump. Never throttle flow
on the suction side of a pump. See Water Piping Diagrams in
this manual.
NOTE: In addition to the factory installed Temperature-Pressure
Relief Valve on the water heater, each remote storage tank that
may be installed and piped to a water heating appliance must also
have its own properly sized, rated and approved TemperaturePressure Relief Valve installed. Call the toll free technical
support phone number listed on the back cover of this manual
for technical assistance in sizing a Temperature-Pressure Relief
Valve for remote storage tanks.
CLOSED WATER SYSTEMS
Water supply systems may, because of code requirements
or such conditions as high line pressure, among others, have
installed devices such as pressure reducing valves, check
valves, and back flow preventers. Devices such as these cause
the water system to be a closed system.
For safe operation of the water heater, the Temperature-Pressure
Relief Valve must not be removed from its designated opening
nor plugged. The Temperature-Pressure Relief Valve must be
installed directly into the fitting of the water heater designed for the
relief valve. Install discharge piping so that any discharge will exit
the pipe within 6 inches (15.2 cm) above an adequate floor drain,
or external to the building. In cold climates it is recommended
that it be terminated at an adequate drain inside the building. Be
certain that no contact is made with any live electrical part. The
discharge opening must not be blocked or reduced in size under
any circumstances. Excessive length, over 30 feet (9.14 m), or
use of more than four elbows can cause restriction and reduce
the discharge capacity of the valve.
THERMAL EXPANSION
As water is heated, it expands (thermal expansion). In a closed
system the volume of water will grow when it is heated. As the
volume of water grows there will be a corresponding increase
in water pressure due to thermal expansion. Thermal expansion
can cause premature tank failure (leakage). This type of failure
is not covered under the limited warranty. Thermal expansion
can also cause intermittent Temperature-Pressure Relief Valve
operation: water discharged from the valve due to excessive
pressure build up. This condition is not covered under the limited
warranty. The Temperature-Pressure Relief Valve is not intended
for the constant relief of thermal expansion.
12
No valve or other obstruction is to be placed between the
Temperature-Pressure Relief Valve and the tank. Do not connect
discharge piping directly to the drain unless a 6” (15.2 cm)
air gap is provided. To prevent bodily injury, hazard to life, or
property damage, the relief valve must be allowed to discharge
water in adequate quantities should circumstances demand. If
the discharge pipe is not connected to a drain or other suitable
means, the water flow may cause property damage.
regarding the Temperature-Pressure Relief Valve call the toll
free number listed on the back cover of this manual for technical
assistance.
CONTAMINATED AIR
Breathing Hazard - Carbon Monoxide Gas
CAUTION
Install water heater in accordance with
the Instruction Manual and NFPA 54 or
CAN/CSA-B149.1.
To avoid injury, combustion and ventilation
air must be taken from outdoors.
Do not place chemical vapor emitting
products near water heater.
Water Damage Hazard
• Temperature-Pressure Relief Valve discharge
pipe must terminate at adequate drain.
Breathing carbon monoxide can cause brain damage or
death. Always read and understand instruction manual.
T&P Valve Discharge Pipe Requirements:
• Shall not be smaller in size than the outlet pipe size of the
valve, or have any reducing couplings or other restrictions.
• Shall not be plugged or blocked.
• Shall not be exposed to freezing temperatures.
• Shall be of material listed for hot water distribution.
• Shall be installed so as to allow complete drainage of both
the Temperature-Pressure Relief Valve and the discharge
pipe.
• Must terminate a maximum of six inches above a floor
drain or external to the building. In cold climates, it is
recommended that the discharge pipe be terminated at an
adequate drain inside the building.
• Shall not have any valve or other obstruction between the
relief valve and the drain.
Corrosion of the flue ways and vent system may occur if air for
combustion contains certain chemical vapors. Such corrosion
may result in failure and risk of asphyxiation.
Combustion air that is contaminated can greatly diminish the life
span of the water heater and water heater components such as
hot surface igniters and burners. Propellants of aerosol sprays,
beauty shop supplies, water softener chemicals and chemicals
used in dry cleaning processes that are present in the combustion,
ventilation or ambient air can cause such damage.
Do not store products of this sort near the water heater. Air which
is brought in contact with the water heater should not contain any
of these chemicals. If necessary, uncontaminated air should be
obtained from remote or outdoor sources. The limited warranty
is voided when failure of water heater is due to a corrosive
atmosphere. (See limited warranty for complete terms and
conditions).
Burn hazard.
AIR REQUIREMENTS
Hot water discharge.
Keep clear of TemperaturePressure Relief Valve
discharge outlet.
Breathing Hazard - Carbon Monoxide Gas
Install water heater in accordance with
the Instruction Manual and NFPA 54 or
CAN/CSA-B149.1.
To avoid injury, combustion and ventilation
air must be taken from outdoors.
Do not place chemical vapor emitting
products near water heater.
The Temperature-Pressure Relief Valve must be manually
operated at least twice a year. Caution should be taken to ensure
that (1) no one is in front of or around the outlet of the TemperaturePressure Relief Valve discharge line, and (2) the water manually
discharged will not cause any bodily injury or property damage
because the water may be extremely hot. If after manually
operating the valve, it fails to completely reset and continues to
release water, immediately close the cold water inlet to the water
heater, follow the draining instructions in this manual, and replace
the Temperature-Pressure Relief Valve with a properly rated/sized
new one.
Breathing carbon monoxide can cause brain damage or
death. Always read and understand instruction manual.
For safe operation an adequate supply of fresh uncontaminated
air for combustion and ventilation must be provided.
An insufficient supply of air can cause recirculation of combustion
products resulting in contamination that may be hazardous to
life. Such a condition often will result in a yellow, luminous burner
flame, causing sooting of the combustion chamber, burners and
flue tubes and creates a risk of asphyxiation.
NOTE: The purpose of a Temperature-Pressure Relief Valve is
to prevent excessive temperatures and pressures in the storage
tank. The T&P valve is not intended for the constant relief of
thermal expansion. A properly sized thermal expansion tank must
be installed on all closed systems to control thermal expansion,
see Closed Water Systems and Thermal Expansion on page 12.
Do not install the water heater in a confined space unless an
adequate supply of air for combustion and ventilation is brought
in to that space using the methods described in the Confined
If you do not understand these instructions or have any questions
13
Space section that follows.
through the water heater’s vent system causing poor combustion.
Sooting, serious damage to the water heater and the risk of fire
or explosion may result. It can also create a risk of asphyxiation.
Never obstruct the flow of ventilation air. If you have any doubts
or questions at all, call your gas supplier. Failure to provide the
proper amount of combustion air can result in a fire or explosion
and cause property damage, serious bodily injury or death.
LOUVERS AND GRILLES
The free areas of the fresh air openings in the instructions that
follow do not take in to account the presence of louvers, grilles or
screens in the openings.
UNCONFINED SPACE
An Unconfined Space is one whose volume IS NOT LESS THAN
50 cubic feet per 1,000 Btu/hr (4.8 cubic meters per kW) of the
total input rating of all appliances installed in the space. Rooms
communicating directly with the space, in which the appliances
are installed, through openings not furnished with doors, are
considered a part of the unconfined space.
Makeup air requirements for the operation of exhaust fans,
kitchen ventilation systems, clothes dryers and fireplaces shall
also be considered in determining the adequacy of a space to
provide combustion, ventilation and dilution air.
The required size of openings for combustion, ventilation and
dilution air shall be based on the “net free area” of each opening.
Where the free area through a design of louver or grille or screen
is known, it shall be used in calculating the size of opening
required to provide the free area specified. Where the louver and
grille design and free area are not known, it shall be assumed
that wood louvers will have 25% free area and metal louvers and
grilles will have 75% free area. Non motorized louvers and grilles
shall be fixed in the open position.
UNUSUALLY TIGHT CONSTRUCTION
VENT REDUCER
In unconfined spaces in buildings, infiltration may be adequate to
provide air for combustion, ventilation and dilution of flue gases.
However, in buildings of unusually tight construction (for example,
weather stripping, heavily insulated, caulked, vapor barrier, etc.)
additional air must be provided using the methods described in
the Confined Space section that follows.
The BTR 500 model is shipped with a 6" to 8" diameter flue outlet
adapter. Each adapter fits on top of the installed blower exhaust.
Use only vent reducers supplied with the unit. The venting must
comply with the NATIONAL FUEL GAS CODE, ANSI Z223.1/
NFPA 54 and for Canadian installations consult the Canadian
Installation Code CAN/CSA B149.1-00.
CONFINED SPACE
A Confined Space is one whose volume IS LESS THAN 50 cubic
feet per 1,000 Btu/hr (4.8 cubic meters per kW) of the total input
rating of all appliances installed in the space.
Openings must be installed to provide fresh air for combustion,
ventilation and dilution in confined spaces. The required size for
the openings is dependent on the method used to provide fresh
air to the confined space AND the total Btu/hr input rating of all
appliances installed in the space.
EXHAUST FANS
Where exhaust fans are installed, additional air shall be provided
to replace the exhausted air. When an exhaust fan is installed
in the same space with a water heater, sufficient openings to
provide fresh air must be provided that accommodate the
requirements for all appliances in the room and the exhaust fan.
Undersized openings will cause air to be drawn into the room
Figure 11
VENTING INSTALLATION
VENTING
• Do not connect the heater to a common vent or chimney with
solid fuel burning equipment. This practice is prohibited by
many local building codes as is the practice of venting gas
fired equipment to the duct work of ventilation systems.
THE INSTRUCTIONS IN THIS SECTION ON VENTING MUST
BE FOLLOWED TO AVOID CHOKED COMBUSTION OR
RECIRCULATION OF FLUE GASES. SUCH CONDITIONS
CAUSE SOOTING OR RISKS OF FIRE AND ASPHYXIATION.
Heater must be protected from freezing downdrafts.
Remove all soot or other obstructions from the chimney that will
retard a free draft.
Type B venting is recommended with these heaters. For typical
venting application see TECHNICAL DATA VENTING on pages
17 and 18.
This water heater must be vented in compliance with all local
codes, the current revision of the National Fuel Gas Code (ANSIZ223.1) and with the Category I Venting Tables.
FIGURE 12
If any part of the vent system are exposed to ambient temperatures
below 40°F it must be insulated to prevent condensation.
• Where a separate vent connection is not available and the
vent pipe from the heater must be connected to a common
14
OUTDOOR AIR THROUGH ONE OPENING
vent with an oil burning furnace, the vent pipe should enter the
smaller common vent or chimney at a point above the large
vent pipe.
MULTIPLE HEATER MANIFOLD
Figure 13 and tables on pages 17 and 18 should be used for
horizontally manifolding two or more heaters.
Figure 15
Alternatively a single permanent opening, commencing within 12
inches (300 mm) of the top of the enclosure, shall be provided.
See Figure 15. The water heater shall have clearances of at
least 1 inch (25 mm) from the sides and back and 6 inches (l50
mm) from the front of the appliance. The opening shall directly
communicate with the outdoors or shall communicate through a
vertical or horizontal duct to the outdoors or spaces that freely
communicate with the outdoors and shall have a minimum free
area of the following:
1. 1 square inch per 3000 Btu/hr (700 mm2 per kW) of the total input
rating of all appliances located in the enclosure, and
2. Not less than the sum of the areas of all vent connectors in the space.
FIGURE 13
FRESH AIR OPENINGS FOR CONFINED SPACES
The following instructions shall be used to calculate the size,
number and placement of openings providing fresh air for
combustion, ventilation and dilution in confined spaces. The
illustrations shown in this section of the manual are a reference
for the openings that provide fresh air into confined spaces
only. DO NOT refer to these illustrations for the purpose of vent
installation. See Venting Installation on page 14 for complete
venting installation instructions.
OUTDOOR AIR THROUGH TWO HORIZONTAL DUCTS
OUTDOOR AIR THROUGH TWO OPENINGS
Figure 16
The confined space shall be provided with two permanent
horizontal ducts, one commencing within 12 inches (300 mm) of
the top and one commencing within 12 inches (300 mm) of the
bottom of the enclosure. The horizontal ducts shall communicate
directly with the outdoors. See Figure 16.
Each duct opening shall have a minimum free area of 1 square
inch per 2,000 Btu/hr (1100 mm2 per kW) of the aggregate input
rating of all appliances installed in the enclosure.
When ducts are used, they shall be of the same cross sectional
area as the free area of the openings to which they connect.
The minimum dimension of rectangular air ducts shall be not less
than 3 inches.
Figure 14
The confined space shall be provided with two permanent
openings, one commencing within 12 inches (300 mm) of the top
and one commencing within 12 inches (300 mm) of the bottom of
the enclosure. The openings shall communicate directly with the
outdoors. See Figure 14.
Each opening shall have a minimum free area of 1 square inch
per 4,000 Btu/hr (550 mm2 per kW) of the aggregate input rating
of all appliances installed in the enclosure. Each opening shall
not be less than 100 square inches (645 cm2).
15
OUTDOOR AIR THROUGH TWO VERTICAL DUCTS
AIR FROM OTHER INDOOR SPACES
The illustrations shown in this section of the manual are a
reference for the openings that provide fresh air into confined
spaces only.
DO NOT refer to these illustrations for the purpose of vent
installation. See Venting Installation on page 14 for complete
venting installation instructions.
Figure 18
The confined space shall be provided with two permanent
openings, one commencing within 12 inches (300 mm) of the top
and one commencing within 12 inches (300 mm) of the bottom of
the enclosure. See Figure 18.
Each opening shall communicate directly with an additional
room(s) of sufficient volume so that the combined volume of all
spaces meets the criteria for an Unconfined Space.
Figure 17
The confined space shall be provided with two permanent vertical
ducts, one commencing within 12 inches (300 mm) of the top and
one commencing within 12 inches (300 mm) of the bottom of the
enclosure. The vertical ducts shall communicate directly with the
outdoors. See Figure 17.
Each opening shall have a minimum free area of 1 square inch
per 1,000 Btu/hr (1100 mm2 per kW) of the aggregate input rating
of all appliances installed in the enclosure. Each opening shall
not be less than 100 square inches (645 cm2).
Each duct opening shall have a minimum free area of 1 square
inch per 4,000 Btu/hr (550 mm2 per kW) of the aggregate input
rating of all appliances installed in the enclosure.
When ducts are used, they shall be of the same cross sectional
area as the free area of the openings to which they connect.
The minimum dimension of rectangular air ducts shall be not less
than 3 inches.
16
TABLE 7. TECHNICAL DATA VENTING
TYPE B GAS VENT
Multiple Gas Fired Tank-Type Heaters
When venting multiple tank type heaters using Type B vent
pipe, follow the installation diagram (figure 13) and tables
below which give sizing and data based upon NFPA 54/ANSI
Z223. 1992.
MODEL 120
Input: 120,000 Btu/hr
Vent Connector Size: 5 inches
Number of
120 Heaters
2
3
4
MODEL 154
Input: 154,000 Btu/hr
Vent Connector Size: 6 inches
6
Input Btu/hr
120,000
120,000
120,000
Combined Input
in Thousands of Btu/hr
240,000
360,000
480,000
Rise
1 Ft.
2 Ft.
3 Ft.
6
5
5
Manifold and Common Vent Diameter (Inches)
7
7
6
6
6
6
6
8
8
7
7
7
6
6
9
9
9
8
8
7
7
6
Input Btu/hr
154,000
154,000
154,000
Combined Input
in Thousands of Btu/hr
308,000
462,000
616,000
Number of
154 Heaters
2
3
4
MODEL 180,199, 200
Input: 180,000, 190,000 and 199,000 Btu/hr
Vent Connector Size: 6 inches
Input Btuh/hrRise
180,000
190,000
199,000
180,000
190,000
199,000
180,000
190,000
199,000
Number of
Combined Input
Heaters
in Thousands of Btu/hr
360,000
2
380,000
398,000
540,000
3
570,000
597,000
720,000
4
760,000
796,000
Total Vent Height (Feet)
8
10
15
20
30
50
Vent Connector Diameter (Inches)
6
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
Rise
1 Ft.
2 Ft.
3 Ft.
6
6
6
Total Vent Height (Feet)
8
10
15
20
30
50
Vent Connector Diameter (Inches)
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
Manifold and Common Vent Diameter (Inches)
7
7
6
6
6
6
6
8
8
7
7
7
6
6
9
9
9
8
8
7
7
1 Ft.
1 Ft.
1 Ft.
2 Ft.
2 Ft.
2 Ft.
3 Ft.
3 Ft.
3 Ft.
17
Total Vent Height (Feet)
6
8
10
15
20
30
Vent Connector Diameter (Inches)
7
7
6
6
6
6
7
7
7
6
6
6
7
7
7
6
6
6
6
6
6
6
6
6
7
6
6
6
6
6
7
7
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
100
5
5
5
6
6
6
100
6
6
6
6
6
6
50
100
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
Manifold & Common Vent Diameter (Inches)
7
7
6
6
6
6
6
7
7
7
6
6
6
6
6
7
7
6
6
6
6
7
6
6
6
6
6
6
7
6
6
6
6
6
6
6
7
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
TABLE 8. TECHNICAL DATA VENTING (Continued)
MODEL 250
Input: 250,000 Btu/hr
Vent Connector Size: 6 inches
Number
250 of Heaters
2
3
4
MODEL 275
Input: 275,000 Btu/hr
Vent Connector Size: 6 inches
Number of
275 Heaters
2
3
4
MODEL 310
Input: 310,000 Btu/hr
Vent Connector Size: 6 inches
Number of
310 Heaters
2
3
4
MODEL 366, 400
Input: 366,000, 399,000 Btu/hr
Vent Connector Size: 6 inches
Number of
Heaters
2
3
4
Input Btuh/hrRise
250,000
250,000
250,000
Combined Input
in Thousands of Btu/hr
500,000
750,000
1,000,000
Input Btu/hr
275,000
275,000
275,000
Combined Input
in Thousands of Btu/hr
550,000
825,000
1,100,000
Input Btu/hr
310,000
310,000
310,000
Combined Input
in Thousands of Btu/hr
620,000
930,000
1,240,000
Input Btu/hr
366,000
399,000
366,000
399,000
366,000
399,000
Combined Input
in Thousands of Btu/hr
732,000
798,000
1,098,000
1,197,000
1,464,000
1,596,000
1 Ft
2 Ft
3 Ft
Total Vent Height (Feet)
6
8
10
15
20
Vent Connector Diameter (Inches)
8
8
7
7
7
7
7
7
7
6
7
7
7
7
6
30
50
100
6
6
6
6
6
6
6
6
6
Manifold and Common Vent Diameter (Inches)
9
9
9
8
8
7
7
12
12
10
10
10
9
8
14
14
12
12
10
10
9
Rise
1 Ft
2 Ft.
3 Ft
Total Vent Height (Feet)
6
8
10
15
20
30
Vent Connector Diameter (Inches)
8
8
7
7
6
6
8
8
7
7
6
6
7
7
7
7
6
6
50
100
6
6
6
6
6
6
Manifold and Common Vent Diameter (Inches)
10
9
9
8
8
8
7
12
12
12
10
9
9
8
14
14
14
12
12
10
9
Rise
1 Ft.
2 Ft.
3 Ft.
Total Vent Height (Feet)
6
8
10
15
20
30
Vent Connector Diameter (Inches)
9
8
8
8
7
7
8
8
8
7
7
7
8
8
8
7
7
7
18
7
8
9
50
100
6
6
6
6
6
6
7
9
10
7
8
9
50
100
8
8
8
8
8
8
8
8
8
8
8
8
Manifold & Common Vent Diameter (Inches)
12
10
10
9
9
9
8
12
12
10
10
9
9
8
14
14
14
12
12
10
9
14
14
14
12
12
10
10
16
16
14
14
14
12
12
16
16
16
14
14
12
12
8
8
9
9
10
10
Manifold & Common Vent Diameter
10
10
9
9
8
8
14
12
12
12
10
9
14
14
14
12
12
12
Rise
1 Ft
1 Ft
2 Ft
2 Ft
3 Ft
3 Ft
7
8
9
Total Vent Height (Feet)
6
8
10
15
20
30
Vent Connector Diameter (Inches)
9
9
9
8
8
8
10
9
9
9
8
8
9
9
8
8
8
8
9
9
9
8
8
8
9
8
8
8
8
8
9
9
8
8
8
8
WATER HEATER INSTALLATION
WATER LINE CONNECTIONS
T&P VALVE DISCHARGE PIPE
This manual provides detailed installation diagrams (see pages
33-47 of this manual) for typical methods of application for the
water heater(s).
The water heater may be installed by itself, or with a separate
storage tank, on both single and two-temperature systems. When
used with a separate storage tank, the circulation may be either
by gravity or by means of a circulating pump. When a circulating
pump is used it is important to note that the flow rate should be slow
so that there will be a minimum of turbulence inside the heater.
Explosion Hazard
Temperature-Pressure Relief Valve
must comply with ANSI Z21.22CSA 4.4 and ASME code.
WATER (POTABLE) HEATING AND SPACE HEATING
1.
All piping components connected to this unit for space heating
applications shall be suitable for use with potable water.
Properly sized temperaturepressure relief valve must be
installed in opening provided.
2.
Toxic chemicals, such as those used for boiler treatment, shall
NEVER be introduced into this system.
Can result in overheating and
excessive tank pressure.
3.
This unit may NEVER be connected to any existing heating
system or component(s) previously used with a non-potable
water heating appliance.
4.
When the system requires water for space heating at
temperatures higher than required for domestic water
purposes, a tempering valve must be installed. Please refer
to installation diagrams on pages 33-47 of this manual for
suggested piping arrangements.
Can cause serious injury or death.
This water heater is provided with a properly rated/sized and
certified combination temperature - pressure (T&P) relief valve
by the manufacturer. See Temperature-Pressure Relief Valve
on pages 12-13 for information on replacement and other
requirements.
THERMOMETERS (NOT SUPPLIED)
CAUTION
Thermometers should be obtained and field installed as shown in
the installation diagrams.
Water Damage Hazard
Thermometers are installed in the system as a means of detecting
the temperature of the outlet water supply.
• Temperature-Pressure Relief Valve discharge
WATER PIPING DIAGRAMS
pipe must terminate at adequate drain.
This manual provides detailed water piping diagrams for typical
methods of application for the water heaters, see Water Piping
Diagrams beginning 33.
Install a discharge pipe between the T&P valve discharge opening
and a suitable floor drain. Do not connect discharge piping
directly to the drain unless a 6” (15.2 cm) air gap is provided.
To prevent bodily injury, hazard to life, or property damage, the
relief valve must be allowed to discharge water in adequate
quantities should circumstances demand. If the discharge pipe is
not connected to a drain or other suitable means, the water flow
may cause property damage.
The water heater may be installed by itself, or with a separate
storage tank. When used with a separate storage tank, the
circulation may be either by gravity or by means of circulating
pump. When a circulating pump is used, it is important to note
that the flow rate should be slow so that there will be a minimum
of turbulence inside the water heater storage tank.
Adjust flow by throttling a full port ball valve installed in the
circulating line on the outlet side of the pump. Never throttle flow
on the suction side of a pump. See the Water Piping Diagrams
beginning on page 33.
T&P Valve Discharge Pipe Requirements:
• Shall not be smaller in size than the outlet pipe size of the
valve, or have any reducing couplings or other restrictions.
• Shall not be plugged or blocked.
• Shall not be exposed to freezing temperatures.
• Shall be of material listed for hot water distribution.
• Shall be installed so as to allow complete drainage of both
the Temperature-Pressure Relief Valve and the discharge
pipe.
• Must terminate a maximum of six inches above a floor
drain or external to the building. In cold climates, it is
recommended that the discharge pipe be terminated at an
adequate drain inside the building.
• Shall not have any valve or other obstruction between the
relief valve and the drain.
NOTE: In addition to the factory installed Temperature-Pressure
Relief Valve (T&P valve) on the water heater, each remote
storage tank that may be installed and piped to a water heating
appliance must also have its own properly sized, rated and
approved Temperature-Pressure Relief Valve installed.
Call the toll free technical support phone number listed on the
back cover of this manual for further assistance in sizing a T&P
valve for remote storage tanks.
19
INSTALLATION DIAGRAMS - TOP INLET/OUTLET USAGE
CODE RESTRICTIONS
The type, size and location of the relief valves must be in
accordance with local codes. The locations of the relief valves
shown in the installation diagrams are typical. See pages 33-47.
The heater has a factory installed high temperature limit switch
and temperature and pressure relief valve.
Use of the top inlet water connection is not permitted on
installations in the state of North Carolina, due to the material of
the tube (Polypropylene). Where such code restrictions exist, use
only lower inlet tank connection. This may also require a heat
trap - check local codes. The “Top Outlet” connection may still be
used on these applications. Plug or cap all unused openings in
the tank before filling with water.
Cold water lines to heater should be installed as shown in order
to minimize gravity circulation of hot water to building cold water
lines.
TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE
TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE
CONTROL WARNING ON PAGE 11. IF HIGHER PREHEAT
TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE
BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT
WATER SUPPLIED TO FIXTURES.
A listed temperature and pressure relief valve of adequate capacity
is installed on the heater. The locations shown in the installation
diagrams on the following pages are typical.
The discharge opening of the temperature and pressure relief
valve, located in front of the heater must be piped to an open drain
and should not be subject to freezing temperatures.
Install in accordance with all local codes.
Use of the top inlet water connection requires installation of an inlet
dip tube (refer to figure 19). The tube is supplied in the heater.
Follow caution labels if applying heat to this fitting. Do not allow
pipe dope to contact the plastic tube during installation.
TUBE INLET INSTALLATION
FIGURE 19
20
HEATER WIRING
All electrical work must be installed in accordance with the latest version of the National Electrical Code ANSI/NFPA No. 70, must conform to all
local code authority having jurisdiction. AN ELECTRICAL GROUND IS REQUIRED TO REDUCE RISK OF ELECTRICAL SHOCK OR POSSIBLE
ELECTROCUTION.
If any of the original wire as supplied with the appliance must be replaced, use only type 105°C thermoplastic or equivalent. 2500C type F must be
used for the flame sensor leads and the spark ignition cable must be high voltage 250°C.
R
BK
BK
INDUCER
R
UPPER
PROBE/
ECO
BLOWER PROVER
PRESSURE SWITCH
W
BK
Y
THERMOSTAT
R
TO EARTH
GROUND
R
BL
BR
IGNITION BOARD
R
BK
LOWER
PROBE
1a 1 1b
R
W
HOT 120 VAC
NEUTRAL
EARTH GROUND
G
IGNITOR/FLAME
SENSOR
R
R
120 VAC CIRCUIT
FACTORY INSTALLED
BY INSTALLER
W
IN
IN
PSI
PSI
Y
ON
ON
Y
WIRING DIAGRAM:
WHEN EQUIPPED WITH WHITE-RODGERS IGNITION
BOARD, DIGITAL THERMOSTAT AND CONTROLS.
OFF
OFF
BK - BLACK
BR - BROWN
R - RED
Y - YELLOW
G - GREEN
BL - BLUE
W - WHITE
IF ANY OF THE ORIGINAL WIRE AS SUPPLIED
MUST BE REPLACED USE ONLY TYPE 105 C
THERMOPLASTIC OR EQUIVALENT.
FIGURE 20
21
GAS PIPING
PRESSURE TESTING EXCEEDING 1/2 PSIG. GAS SUPPLY LINE
MUST BE CAPPED WHEN DISCONNECTED FROM THE HEATER
FOR TEST PRESSURES OF 1/2 PSIG OR LESS. THE APPLIANCE
NEED NOT BE DISCONNECTED, BUT MUST BE ISOLATED FROM
THE SUPPLY PRESSURE TEST BY CLOSING THE MANUAL GAS
SHUTOFF VALVE.
Contact your local gas service company to ensure that adequate gas
service is available and to review applicable installation codes for your
area.
Size the main gas line in accordance with Table 3. The figures shown
are for straight lengths of pipe at 0.5 in. W.C. pressure drop, which is
considered normal for low pressure systems. Note: Fittings such as
elbows, tees and line regulators will add to the pipe pressure drop. Also
refer to the latest version of the National Fuel Gas Code.
GAS PIPING AND DIRT LEG INSTALLATION
THE HEATER IS NOT INTENDED FOR OPERATION AT HIGHER
THAN 14.0” W.C.- NATURAL GAS, (1/2 POUND PER SQUARE INCH
GAGE) SUPPLY GAS PRESSURE. EXPOSURE TO HIGHER SUPPLY
PRESSURE MAY CAUSE DAMAGE TO THE GAS VALVE WHICH
COULD RESULT IN FIRE OR EXPLOSION. IF OVERPRESSURE HAS
OCCURRED SUCH AS THROUGH IMPROPER TESTING OF GAS LINES
OR EMERGENCY MALFUNCTION OF THE SUPPLY SYSTEM, THE GAS
VALVE MUST BE CHECKED FOR SAFE OPERATION. MAKE SURE
THAT THE OUTSIDE VENTS ON THE SUPPLY REGULATORS AND
THE SAFETY VENT VALVES ARE PROTECTED AGAINST BLOCKAGE.
THESE ARE PARTS OF THE GAS SUPPLY SYSTEM, NOT THE HEATER.
VENT BLOCKAGE MAY OCCUR DURING ICE STORMS.
FIGURE 21
TABLE 9 - GAS SUPPLY LINE SIZES (IN INCHES)*
MAXIMUM CAPACITY OF PIPE IN
CUBIC FEET PER HOUR
PURGING
Gas line purging is required with new piping or systems in which
air has entered.
LENGTH
IN
FEET
10
20
30
40
50
60
70
80
90
100
125
150
175
200
NOMINAL IRON PIPE SIZE (INCHES)
1/2"
3/4"
1"
175
120
97
82
73
66
61
57
53
50
44
40
37
35
360
250
200
170
151
138
125
118
110
103
93
84
77
72
680
465
375
320
285
260
240
220
205
195
175
160
145
135
1 1/4" 1 1/2"
1400
950
770
660
580
530
490
460
430
400
360
325
300
280
2100
1460
1180
990
900
810
750
690
650
620
550
500
460
430
2"
2 1/2"
3"
4"
3960
2750
2200
1900
1680
1520
1400
1300
1220
1150
1020
950
850
800
6300
4360
3520
3000
2650
2400
2250
2050
1950
1850
1650
1500
1370
1280
11000
7700
6250
5300
4750
4300
3900
3700
3450
3250
2950
2650
2450
2280
23000
15800
12800
10900
9700
8800
8100
7500
7200
6700
6000
5500
5000
4600
PURGING SHOULD BE PERFORMED BY PERSONS
EXPERIENCED IN THIS TYPE GAS SERVICE. TO AVOID RISK
OF FIRE OR EXPLOSION, PURGE DISCHARGE MUST NOT
ENTER CONFINED AREAS OR SPACES WHERE IGNITION
CAN OCCUR. THE AREA MUST BE WELL VENTILATED AND
ALL SOURCES OF IGNITION MUST BE INACTIVATED OR
REMOVED.
GAS METER SIZE — NATURAL GASES ONLY
Be sure the gas meter has sufficient capacity to supply the full
rated gas input of the water heater as well as the requirements of
all other gas fired equipment supplied by the meter. If gas meter
is too small, ask the gas company to install a larger meter having
adequate capacity.
IT IS IMPORTANT TO GUARD AGAINST GAS VALVE FOULING FROM
CONTAMINANTS IN THE GAS WAYS. SUCH FOULING MAY CAUSE
IMPROPER OPERATION, FIRE OR EXPLOSION.
GAS PRESSURE REGULATOR
The gas pressure regulator is built into the gas valve and is
equipped to operate on the gas specified on model and rating
plate. The regulator is factory adjusted to deliver gas to burner
at correct water column pressure allowing for a nominal pressure
drop through the controls.
IF COPPER SUPPLY LINES ARE USED THEY MUST BE INTERNALLY
TINNED AND CERTIFIED FOR GAS SERVICE. BEFORE ATTACHING
THE GAS LINE, BE SURE THAT ALL GAS PIPE IS CLEAN ON THE
INSIDE.
TO TRAP ANY DIRT OR FOREIGN MATERIAL IN THE GAS SUPPLY
LINE, A DIRT LEG (SOMETIMES CALLED SEDIMENT TRAP OR DRIP
LEG) MUST BE INCORPORATED IN THE PIPING (SEE FIG. 21). THE
DIRT LEG MUST BE READILY ACCESSIBLE AND NOT SUBJECT
TO FREEZING CONDITIONS. INSTALL IN ACCORDANCE WITH
RECOMMENDATIONS OF SERVING GAS SUPPLIERS. REFER TO
THE LATEST VERSION OF THE NATIONAL FUEL GAS CODE.
The minimum gas supply pressure for input adjustment must not
be less than 4.5” w.c. (1.12 kPa) for natural gas.
Do not subject the combination gas valve to inlet gas
pressures of more than 14.0” W.C. (3.48 kPa) - natural gas.
A service regulator is necessary if higher gas pressures are
encountered.
To prevent damage, care must be taken not to apply too much
torque when attaching gas supply pipe to gas valve inlet.
Gas pressure specified in Table 10, refer to flow pressure taken at
pressure tap of automatic gas valve while heater is operating.
Apply joint compounds (pipe dope) sparingly and only to the
male threads of pipe joints. Do not apply compounds to the first
two threads. Use compounds resistant to the action of liquefied
petroleum gases.
TABLE 10
MANIFOLD GAS PRESSURE IN INCHES
OF WATER COLUMN (ALL MODELS*)
BEFORE PLACING THE HEATER IN OPERATION, CHECK FOR GAS
LEAKAGE. Use soap and water solution or other material acceptable for
the purpose in locating the leaks. DO NOT USE MATCHES, CANDLES,
FLAME OR OTHER SOURCES OF IGNITION FOR THIS PURPOSE.
TYPE OF GAS
NATURAL
3.5 (0.87 kPa)
DISCONNECT THE HEATER AND ITS MANUAL GAS SHUTOFF VALVE
FROM THE GAS SUPPLY PIPING SYSTEM DURING ANY SUPPLY
22
PROPANE
10.0 (2.48 kPa)
OPERATION
IMPORTANT
THE GAS VALVE MUST HAVE BEEN IN THE OFF POSITION FOR
AT LEAST 5 MINUTES. This waiting period is an important safety
step. Its purpose is to permit gas that may have accumulated in the
combustion chamber to clear. IF YOU DETECT GAS ODOR AT
THE END OF THIS PERIOD DO NOT PROCEED WITH LIGHTING.
RECOGNIZE THAT GAS EVEN IF IT SEEMS WEAK, MAY
INDICATE PRESENCE OF ACCUMULATED GAS SOMEPLACE
IN THE AREA WITH RISK OF FIRE OR EXPLOSION. SEE THE
FRONT PAGE FOR STEPS TO BE TAKEN.
A qualified person must perform the initial firing of the heater. At
this time the user should not hesitate to ask the individual any
questions which they may have in regard to the operation and
maintenance of the unit.
An Operational Checklist is included at the rear of this manual. By using
this checklist the user may be able to make minor operational adjustments
and avoid unnecessary service calls. However, the user should not
attempt repairs which are not listed under the USER column.
All gas and water lines leak tested and open.
GENERAL
Read SEQUENCE OF OPERATION section of this manual prior
to lighting and operating this appliance.
NEVER OPERATE THE HEATER WITHOUT FIRST BEING CERTAIN
IT IS FILLED WITH WATER AND A TEMPERATURE AND
PRESSURE RELIEF VALVE IS INSTALLED IN THE RELIEF
VALVE OPENING OF THE HEATER.
With above conditions satisfied, start the unit in accordance with
the instructions on the operating label attached to the heater. For
your convenience a copy of the instructions are shown of page
31. Each heater is equipped with an ignition control board. The
controller will try three times to light the main burner before going
into lockout. After the controller tries three times, it will wait one
hour before trying to light the unit again. This cycle will continue
until the main burners are ignited or the unit is shut down.
SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL
TO SHUT OFF, TURN OFF THE MANUAL GAS CONTROL VALVE
TO THE APPLIANCE.
Before proceeding with the operation of the unit make sure
the water heater and system are filled with water and all air is
expelled.
ADJUSTMENTS
FILLING
ON INITIAL STARTUP SOME ADJUSTMENTS ARE NECESSARY.
1.
2.
1.
CHECK MANIFOLD AND INLET GAS PRESSURES.
2.
CYCLE CHECK - CHECK AT LEAST ONE BURNER OPERATION
- WHEN THERMOSTAT IS SATISFIED, BURNER WILL SHUT
OFF AND INDUCER WILL STOP RUNNING. ON CALL FOR
HEAT - THE INDUCER WILL COME ON AND CLOSE THE
PRESSURE SWITCH AND THE IGNITION SEQUENCE
DESCRIBED ABOVE WILL BEGIN, SEE “SEQUENCE OF
OPERATION”.
3.
4.
5.
Close the heater drain valve by turning handle clockwise.
Open a nearby hot water faucet to permit the air in the system
to escape.
Fully open the cold water inlet pipe valve allowing the heater
and piping to be filled.
Close the hot water faucet as water starts to flow.
The heater is ready to be operated.
SEQUENCE OF OPERATION
Nitride Ignitor.
11. From the time the Silicon Nitride Ignitor’s power is shut off,
the Ignition Control Board waits 3 more seconds to monitor
the Flame Sensor.
12. If the Flame Sensor does not detect a strong enough flame,
the Ignition Control Board shuts off the Gas Valve and allows
the Exhaust Inducer to purge the unit for 20 seconds. At that
time, the Ignition Control Board restarts with step 7. It will try
and ignite the main burners 2 more times. If the unit does not
light, the Ignition Control Board will wait one hour and then
restart at step 3. This cycle will continue until the unit lights
or the power is shutoff to the unit.
13. If the Flame Sensor detects a strong flame, the Ignition Control
Board will allow the unit to operate until the thermostat is
satisfied.
14. Once the unit is satisfied, the Ignition Control Board will shut
off the Gas Valve and the unit will be in standby mode until
another call for heat is initiated by the thermostat.
The following information will describe the Sequence of Operation for
this appliance.
1.
2.
3.
Switch power on to unit.
Thermostat calls for heat.
Ignition Control Board performs diagnostic check on system
components.
4. On completion of diagnostics check, the Ignition Control Board
sends signal to Exhaust Inducer.
5. Exhaust Inducer begins drawing air through appliance closing
the Prover Switch.
6. On completion of Prover Switch engagement, the Ignition
Control Board begins the ignition cycle.
7. The Ignition Control Board provides power to the Silicon
Nitride Ignitor.
8. The Silicon Nitride Ignitor heats up for approximately 17 to
20 seconds.
9. At the end of Silicon Nitride Ignitor’s warm-up, the Ignition
Control Board opens the Gas Valve.
10. From the time the Gas Valve opens, the Ignition Control
Board waits 3 seconds and then shuts off power to the Silicon
See the flow chart on page 31 for more information.
23
LIGHTING & OPERATION LABEL
FOR YOUR SAFETY READ BEFORE OPERATING
you do not follow these instructions exactly, a fire or explosion
WARNING If
may result causing property damage, personal injury, or loss of life.
FLAMMABLE
If you cannot reach your gas supplier, call the fire department.
A. This appliance does not have a pilot. It is equipped with an ignition device which
automatically lights the burner. Do not try to light the burner by hand.
C. Use only your hand to push in or turn the gas control knob. Never use tools. If
B. BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell
next to the floor because some gas is heavier than air and will settle on the floor.
the knob will not push in or turn by hand, don't try to repair it. Call a qualified
service technician. Force or attempted repair may result in a fire or explosion.
"WHAT TO DO IF YOU SMELL GAS"
D. Do not use this appliance if any part has been under water. Immediately call a
Do not try to light any appliance.
Do not touch any electric switch; do not use any telephone in your building.
qualified service technician to inspect the appliance and to replace any part of
Immediately call your gas supplier from a neighbor's telephone. Follow the
gas suppliers instructions.
the control system and any gas control which has been under water.
OPERATING INSTRUCTIONS
1.
STOP! Read the safety information above on this label.
2. Set thermostat to lowest setting.
3. Turn off all electric power to the appliance.
GAS
CONTROL
KNOBS
PSI
IN
4. This appliance is equipped with an ignition device which automatically lights
the burner. Do not try to light the burner by hand.
5. Push in gas control knobs slightly and turn clockwise
6.
ON
to off.
Wait five(5) minutes to clear out any gas. If you then smell gas,
Follow "B" in the safety information above on this label. If you
OFF
STOP!.
don't
smell gas, go on to next step.
PSI
7.
Turn gas control knobs counterclockwise
8.
Turn on all electric power to the appliance.
9.
Set thermostat to desired setting.
10.
to "ON".
IN
If the appliance will not operate, follow the instructions "To Turn Off Gas To Appliance"
ON
OFF
and call your service technician or gas supplier.
FOR YOUR SAFETY READ BEFORE OPERATING
1.
Set the thermostat to lowest setting.
2.
Turn off all electric power to appliance if service is to be performed.
3.
Push in gas control knobs slightly and turn clockwise
FIGURE 22
24
to "OFF". Do not force.
CHECKING VENTING
MAIN BURNER
The following steps shall be followed with each appliance
connected to the venting system placed in operation, while any
other appliances connected to the venting system are not in
operation.
1. Seal any unused openings in the venting system.
2. Inspect the venting system for proper size and horizontal pitch,
as required in the National Fuel Gas Code, ANSI Z223.1or the
CAN/CGA B149 Installation Codes and these instructions.
Determine that there is no blockage or restriction, leakage,
corrosion and other deficiencies which could cause an unsafe
condition.
3. So far as is practical, close all building doors and windows
and all doors between the space in which the water heater(s)
connected to the venting system are located and other spaces
of the building. Turn on all appliances not connected to the
venting system. Turn on all exhaust fans, such as range hoods
and bathroom exhausts, so they shall operate at maximum
speed. Close fireplace dampers.
4. Follow the lighting instruction. Place the water heater being
inspected in operation. Adjust thermostat so appliance shall
operate continuously.
5. Test for spillage at the burner level after 5 minutes of main
burner operation.
6. After it has been determined that each BTR connected to the
venting system properly vents when tested as outlined above,
return doors, windows, exhaust fans, fireplace dampers and
any other gas burning appliance to their previous conditions
of use.
7. If improper venting is observed during any of the above tests,
the venting system must be corrected.
The main burner, figure 24, should display the following characteristics:
•
Cause rapid ignition and carry across entire burner.
•
Give reasonably quiet operation during ignition, burning, and
extinction.
•
Cause no excessive lifting of flame from burner ports.
FIGURE 24
If the preceding burner characteristics are not evident, check for
accumulation of lint, scale or other foreign debris that restricts or
blocks the air openings to the burner or heater.
NOTE:
1. Remove main burners from unit.
2. Check that burner venturi and ports are free of foreign
debris.
3. Clean burners with bristle brush and/or vacuum cleaner - DO
NOT distort burner ports or pilot location.
4. Reinstall burners in unit. Make sure front and rear of burners
are installed correctly in burner support brackets.
FAILURE TO CORRECT BACK DRAFTS MAY CAUSE AIR
CONTAMINATION AND UNSAFE CONDITIONS.
Also check for good flow of combustion and ventilating air to the
unit. Maintain a clear area around the heater at all times.
• If the back draft cannot be corrected by the normal method or
if a suitable draft cannot be obtained, a blower type flue gas
exhauster must be employed to assure proper venting and
correct combustion.
GAS VALVES
CHECK THE IGNITER ASSEMBLY
If the gas valve becomes defective, repairs should not be attempted. A
new valve should be installed in place of the defective one.
Figure 25 shows the type of combination manual gas control valve and
regulator used on these heaters.
At least once a year, check the ignitor assembly, Figure 23, and
the main burner, Figure 24, for proper operation. Refer to the
following ignitor assembly and main burner sections.
SEALING
CAP
IGNITER ASSEMBLY
GAS
CONTROL
KNOBS
PSI
For access to ignitor assembly, unfasten two screws to burner
cover and remove. Locate the burner with the ignitor assembly
and remove screw holding burner to manifold. Slide burner out
to access ignitor assembly.
IN
ON
OFF
GAS
INLET
Servicing of the ignitor assembly includes keeping the ignitor free
of lint, scale or any other foreign debris.
GAS
OUTLET
PSI
IN
ON
OFF
FIGURE 25
FIGURE 23, IGNITOR
25
CHECKING THE INPUT
Btuh = ?
36.8 X 1050 = 250,000 Btuh (Compare with the BTN 250 model
and rating.)
For appliance installation locations with elevations above 2000 feet, refer
to HIGH ALTITUDE INSTALLATIONS section of this manual for input
reduction procedure.
Should it be necessary to adjust the gas pressure to the burners to obtain
the full input rate, the steps below should be followed:
1. Attach a pressure gauge or a manometer to the manifold pressure
tap on the gas valve and refer to Table X, for correct manifold
pressure.
3. Remove the regulator adjustment sealing cap, fig. 14, and adjust
the pressure by turning the adjusting screw with a screwdriver.
Clockwise to increase gas pressure and input rate.
2. Use this formula to “clock” the meter. Be sure that other gas
consuming appliances are not operating during this interval.
Counterclockwise to decrease gas pressure and input
3600 X H = Btuh
T
rate.
4. “Clock” the meter as in step 2 above.
T = Time in seconds to burn one cubic foot of gas.
5. Repeat steps 3 and 4 until the specified input rate is achieved.
H = Btu’s per cubic foot of gas.
6. Turn the gas control knob to PILOT. Remove the pressure gauge
and replace the sealing cap and the Allen wrench set screw in the
pressure tap opening.
Btuh = Actual heater input.
Example: (Using BTN-250 heater)
UNDER NO CIRCUMSTANCES SHOULD THE GAS INPUT EXCEED
THE INPUT SHOWN ON THE HEATER MODEL AND RATING PLATE.
OVERFIRING COULD RESULT IN DAMAGE OR SOOTING OF THE
HEATER.
T = 15.1 seconds
H = 1050 Btu
MAINTENANCE
VENTING SYSTEM
It is recommended that the Temperature-Pressure Relief Valve
should be checked to ensure that it is in operating condition every
6 months.
Examine the venting system every six months for obstructions
and/or deterioration of the vent piping.
When checking the Temperature-Pressure Relief Valve operation,
make sure that (1) no one is in front of or around the outlet of the
Temperature-Pressure Relief Valve discharge line, and (2) that
the water discharge will not cause any property damage, as the
water may be extremely hot. Use care when operating valve as
the valve may be hot.
Remove all soot or other obstructions from chimney which will
retard free draft.
REMOTE STORAGE TANK TEMPERATURE CONTROL
The water temperature in the remote storage tank (if used) is controlled by
the storage tank temperature control. The sensing element is mounted in
the hot water storage tank, see Water Piping Diagram section.
To check the relief valve, lift the lever at the end of the valve
several times, see Figure 26. The valve should seat properly and
operate freely.
A change in water temperature in the storage tank lower than the tank
temperature control setting will cause the sensor to activate the circulating
pump. The pump then circulates the water through the heater where the
thermostat senses the drop in water temperature and activates main burner
operation of the appliance.
If after manually operating the valve, it fails to completely reset and
continues to release water, immediately close the cold water inlet
to the water heater and drain the water heater, see Draining And
Flushing on page 27. Replace the Temperature-Pressure Relief
Valve with a properly rated/sized new one, see TemperaturePressure Relief Valve on pages 12-13 for instructions on
replacement.
If the storage tank temperature control is out of calibration, replace with
new control.
SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL TO
SHUT OFF, TURN OFF THE MANUAL GAS CONTROL VALVE TO THE
APPLIANCE.
TEMPERATURE-PRESSURE RELIEF VALVE TEST
Burn hazard.
Hot water discharge.
FIGURE 26
Keep clear of TemperaturePressure Relief Valve
discharge outlet.
If the Temperature-Pressure Relief Valve on the water heater
weeps or discharges periodically, this may be due to thermal
expansion.
NOTE: Excessive water pressure is the most common cause of
Temperature-Pressure Relief Valve leakage. Excessive water
system pressure is most often caused by "thermal expansion"
in a "closed system." See Closed Water Systems and Thermal
26
Expansion on page 12. The Temperature-Pressure Relief Valve
is not intended for the constant relief of thermal expansion.
and flushed every 6 months to reduce sediment buildup. The
water heater should be drained if being shut down during freezing
temperatures. See Features And Components in this manual for
the location of the water heater components described below.
Temperature-Pressure Relief Valve leakage due to pressure
build up in a closed system that does not have a thermal
expansion tank installed is not covered under the limited
warranty. Thermal expansion tanks must be installed on all
closed water systems.
DRAINING AND FLUSHING
DO NOT PLUG THE TEMPERATURE-PRESSURE RELIEF
VALVE OPENING. THIS CAN CAUSE PROPERTY DAMAGE,
SERIOUS INJURY OR DEATH.
Burn harzard.
Hot water discharge.
Keep hands clear of drain
valve discharge.
Explosion Hazard
Temperature-Pressure Relief Valve
must comply with ANSI Z21.22CSA 4.4 and ASME code.
TO DRAIN THE WATER HEATER STORAGE TANK:
Properly sized temperaturepressure relief valve must be
installed in opening provided.
Can result in overheating and
excessive tank pressure.
Can cause serious injury or death.
HOT WATER ODOR
On occasion, hot water may develop a strong odor. If this occurs
drain the heater completely, flush thoroughly, and refill. If the
problem persists, chlorination of the heater and replacement of
the factory installed magnesium anodes with aluminum anodes
may correct the condition.
Occasionally water softener companies recommend removal of
heater anodes for odor reasons.
Unauthorized removal of the anode(s) will void the warranty. For
further information contact your dealer.
1.
Turn off the electrical supply to the water heater.
2.
Turn off the gas supply at the Main Gas Shutoff Valve if
the water heater is going to be shut down for an extended
period.
3.
Ensure the cold water inlet valve is open.
4.
Open a nearby hot water faucet and let the water run until
the water is no longer hot.
5.
Close the cold water inlet valve to the water heater.
6.
Connect a hose to the water heater drain valve and terminate
it to an adequate drain.
7.
Open the water heater drain valve and allow all the water to
drain from the storage tank.
8.
Close the water heater drain valve when all water in the
storage tank has drained.
9.
Close the hot water faucet opened in Step 4.
10. If the water heater is going to be shut down for an extended
period, the drain valve should be left open.
TO FLUSH THE WATER HEATER STORAGE TANK:
11. Turn off the electrical supply to the water heater.
12. Ensure the cold water inlet valve is open.
ANODE ROD INSPECTION
13. Open a nearby hot water faucet and let the water run until
the water is no longer hot. Then close the hot water faucet.
The heater tank is equipped with anode rods to provide corrosion
control. At least once a year the anode rods should be checked
to determine if replacement is necessary. Initially the anode rods
are approximately 7/8” in diameter with a 1/8” diameter steel core
wire running down the center of the anode material. THE ANODES
SHOULD BE REPLACED when the 1/8” diameter core wire is
visible as this means that the anode material has been expended
in the control of corrosion.
14. Connect a hose to the drain valve and terminate it to an
adequate drain.
15. Ensure the drain hose is secured before and during the
entire flushing procedure. Flushing is performed with system
water pressure applied to the water heater.
16. Open the water heater drain valve to flush the storage tank.
17. Flush the water heater storage tank to remove sediment and
allow the water to flow until it runs clean.
For models with top inlet and outlet, it is recommended that, before
removing the inner cover for cleaning, inspection or removal of
inner parts, you obtain two new nipple collars, part no. 74060.
The nipple collars on the heater will usually be damaged when
removed. New pipe collars will insure that the seal is such as to
prevent leakage of flue products when properly installed.
18. Close the water heater drain valve when flushing is
completed.
19. Remove the drain hose.
20. Fill the water heater - see Filling The Water Heater in this
manual.
NOTE: Anode rod inspection may need to be made more
frequently in areas subject to acid rain that obtains their water
supply from surface water as the low pH will accelerate anode
activity.
21. Turn on the electrical supply to place the water heater back
in operation.
CAUTION: Close cold water inlet valve serving heater and open
nearby hot water faucet to relieve the pressure in the heater before
attempting to remove anode(s) for inspection.
22. Allow the water heater to complete several heating cycles to
ensure it is operating properly.
It is recommended that the water heater storage tank be drained
27
RECOMMENDED PROCEDURE FOR PERIODIC
REMOVAL OF LIME DEPOSITS FROM TANK TYPE \
COMMERCIAL WATER HEATERS
TANK CLEANOUT PROCEDURE
The amount of calcium carbonate (lime) released from water is
in direct proportion to water temperature and usage, see chart.
The higher the water temperature or water usage, the more lime
deposits are dropped out of the water. This is the lime scale
which forms in pipes, heaters and on cooking utensils.
1.
Once a month the heater should be flushed. Open the drain
valve and allow two gallons of water to drain from the heater.
Inlet water valve should remain open to maintain pressure
in tank.
2.
A cleanout opening is provided for periodic cleaning of
the tank. Gas must be shut off and heater drained before
opening cleanout.
The following practices will ensure longer life and enable the unit
to operate at its designed efficiency:
Lime accumulation not only reduces the life of the equipment
but also reduces efficiency of the heater and increases fuel
consumption.
To clean heater through cleanout opening, proceed as follows:
The usage of water softening equipment greatly reduces the
hardness of the water. However, this equipment does not
always remove all of the hardness (lime). For this reason
it is recommended that a regular schedule for deliming be
maintained.
3.
Drain heater.
4.
5.
Remove outer cover plate from lower side of heater jacket.
Remove six (6) hex head screws securing tank cleanout
plate and remove plate.
The time between cleaning will vary from weeks to months
depending upon water conditions and usage.
6.
Remove lime, scale, or sediment using care not to damage
the glass lining.
Refer to A. O. Smith booklet, Form No. 4800, entitled “Why?
When and How” for detailed description on tank inspection and
cleanout. UN•LIME® and the booklet may be obtained through
your A. O. Smith dealer or distributor.
7.
Inspect cleanout plate gasket, if new gasket is required,
replace with A. O. Smith part no. 99038.
8.
Install cleanout plate. Be sure to draw plate up tight by
tightening screws securely.
9.
Replace outer jacket cover plate.
In some water areas the sediment might not be removed by this
method and may result in the water heater making rumbling or
boiling noises. To dissolve and remove these more stubborn
mineral deposits, A. O. Smith UN•LIME Professional Delimer
should be used.
DELIMING USING FLO-JUG METHOD
UN•LIME in the 5 gallon size is recommended for deliming of
the BT-80 100 models. UN•LIME with the necessary hoses and
fittings to delime your heater is also available as a kit: Up-N-Down
Transfer Kit. Contact your local A.O. Smith dealer, distributor or,
A.O. Smith Water Products Company:
Telephone: (800) 433-2545
Fax: (800) 433-2515
Website: www.hotwater.com/parts
Prepare the Water Heater
To delime the water heater using the Flo-Jug method, first prepare
the heater for deliming as described in the “Why? When? and
How?” booklet, Form No. 4800. Then install the long plastic male
adapter fitting into the drain valve opening of the water heater.
Use teflon tape and hand tighten only. Do not overtighten.
Prepare the Up-N-Down Transfer Kit
The next step is the preparation on the Up-N-Down Transfer Kit,
if you have not already done so:
1. With the 5 gallon Up-N-Down container in the vertical
position, unscrew the plastic vent cap in the handle and
pierce the plastic membrane over the vent boss under the
cap to allow the container to vent.
FIGURE 27
DELIMING SOLVENTS
A. O. Smith recommends the use of UN•LIME for deliming.
UN•LIME is a patented food grade acid which is safe to handle
and does not create the harmful fumes which are associated with
other products.
Note: If your container does not have the vent cap and
vent boss, drill a 3/16” hole in the handle. When you have
finished deliming you will be able to plug this drilled vent with
the stainless steel screw that is supplied with the kit.
UN•LIME may be obtained from your dealer, distributor or the
A. O. Smith Product Service Division. Order Part Number 4763,
1 gallon, packed 4 gallons per case or Part Number 4813,
5 gallon container.
2.
Remove the container’s cap and cut the plastic membrane
located in the 3/4” IPT opening in the cap. Take care to not
damage the threads.
3.
Find the 3/4” male adapter, apply teflon tape to the threaded
end and screw it into the 3/4” IPT opening in the cap.
NOTE: Un•Lime is not available for use in Canada.
Hydrochloric base acids are not recommended for use on glass
lined tanks.
Observe handling instructions on label of product being used.
28
4.
IGNITION MODULE SYSTEM
Put cap with male adapter back on the container and slide
3/4” hose over end of male adapter and fasten in place using
hose clamp provided.
Before calling your service agent, the following checklist should
be examined to eliminate obvious problems from those requiring
replacement or servicing.
Delime using Flo-Jug Method
5.
6.
7.
8.
9.
Slide the hose clamp over end of hose and slide hose over
the male adapter in the water heater drain opening and
secure in place using hose clamp.
Lift container to the “Pour” Position, see Figure 28, being
careful to keep the vent in the handle above the liquid level
and pour the UN•LIME into the heater.
• Check that “main manual gas shutoff valve” is fully open
and that gas service has not been interrupted.
• Check that after following the appliance OPERATING
INSTRUCTIONS, the “Top Knob” of the appliance gas valve
is in “ON” position.
Lower container, you may have to place the container on its
empty carton to prevent the UN•LIME from flowing back into
the container.
• Check electrical supply to the appliance for possible blown
(or tripped) fusing or power interruption.
Let UN•LIME remain in the heater for 5 minutes and then
lower the container to the “Drain” Position, see Figure 28.
Deliming activity is indicated by foaming on the surface of
the UN•LIME. If there is deliming activity, repeat steps 6
thru 8.
• Is the water temperature in tank below the thermostat dial
setting on the appliance thermostat (calling for heat)?
• It is possible that the high limit (E.C.O.) has functioned
to shut off the appliance. See FEATURES — Water
Temperature Control for reset procedure. Contact
your serviceman if limit continues to function to shut off
appliance.
Normally, lime removal will be completed within one hour.
Severe build-up of lime may take longer than an hour to complete
descaling.
Note: To check UN•LIME for continued use, place some scale
or white chalk in a glass with a small amount of UN•LIME. If
the material is vigorously dissolved by the UN•LIME, it can be
reused; if not, the UN•LIME should be replaced.
SYSTEM DIAGNOSTICS
Your water heater is equipped with an ignition module that
incorporates a diagnostic system to assist in troubleshooting the
appliance. The indicator codes on the ignition module are as
follows:
TABLE 10:
1 FLASH
System lockout (retries or cycles exceeded)
2 FLASHES
Pressure switch stuck close
3 FLASHES
Pressure switch stuck open
4 FLASHES
Open on high temperature limit switch (eco)
6 FLASHES
115 volt AC power reversed (check polarity)
7 FLASHES
Low flame sense signal (make sure flame
sensor is in burner flame)
8 FLASHES
Check ignitor
continuous flash -> continuous flame sensed > 5 seconds without
gas valve
continuous on -> internal control failure - replace ignition control
module.
Use this diagnostic system in conjunction with the “OPERATIONAL
CHECKLIST” and the “SEQUENCE OF OPERATION” to
troubleshoot the appliance.
FIGURE 28
SERVICE
The installer may be able to observe and correct certain problems
which may arise when the unit is put into operation. HOWEVER,
it is recommended that only qualified servicemen, using
appropriate test equipment, be allowed to service the heater.
ELECTRICAL SERVICING
LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING
CONTROLS. WIRING ERRORS CAN CAUSE IMPROPER AND
DANGEROUS OPERATION.
As preliminary step, check wiring against diagram, check for
grounded, broken or loose wires. Check all wire ends to be sure
that they are making good contact.
VERIFY PROPER OPERATION AFTER SERVICING.
29
FOR YOUR INFORMATION
START UP CONDITIONS
Contact the local water heater supplier or service agency for
further information concerning an Anode Replacement Kit and
this chlorination treatment.
SMOKE/ODOR
It is not uncommon to experience a small amount of smoke and
odor during the initial start-up. This is due to burning off of oil
from metal parts, and will disappear in a short while.
If the smelly water persists after the anode replacement and
chlorination treatment, we can only suggest that chlorination or
aeration of the water supply be considered to eliminate the water
problem.
STRANGE SOUNDS
Possible noises due to expansion and contraction of some metal
parts during periods of heat-up and cool-down do not necessarily
represent harmful or dangerous conditions.
Do not remove the anode leaving the tank unprotected. By doing
so, all warranty on the water heater tank is voided.
Condensation causes sizzling and popping within the burner area
during heating and cooling periods and should be considered
normal. See “Condensate” in this manual.
HYDROGEN GAS: Hydrogen gas can be produced in a hot
water system that has not been used for a long period of time
(generally two weeks or more). Hydrogen gas is extremely
flammable and explosive. To prevent the possibility of injury
under these conditions, we recommend the hot water faucet,
located farthest away, be opened for several minutes before
any electrical appliances which are connected to the hot water
system are used (such as a dishwasher or washing machine). If
hydrogen gas is present, there will probably be an unusual sound
similar to air escaping through the pipe as the hot water faucet
is opened. There must be no smoking or open flame near the
faucet at the time it is open.
“AIR” IN HOT WATER FAUCETS
OPERATIONAL CONDITIONS
SMELLY WATER
In each water heater there is installed at least one anode rod for
corrosion protection of the tank. Certain water conditions will
cause a reaction between this rod and the water. The most
common complaint associated with the anode rod is one of a
“rotten egg smell” in the hot water. The smell is a result of four
factors which must all be present for the odor to develop:
a.
A concentration of sulfate in the supply water.
b.
Little or no dissolved oxygen in the water.
c.
A sulfate reducing bacteria which has accumulated
within the water heater (this harmless bacteria is
nontoxic to humans).
d.
HIGH WATER TEMPERATURE SHUT OFF SYSTEM
This water heater is equipped with an automatic reset type high
limit (Energy Cutoff) sensor. The high limit switch interrupts the
main burner gas flow should the water temperature reach 195°F
(91°C).
The high limit will automatically reset when the water temperature
drops below 140°F (60°C). After cooling the tank temperature, turn
off the water heater for at least 10 seconds by using the switch on
top of the unit. Turn on the water heater. If this fails to correct the
problem, contact your plumber or service representative.
An excess of active hydrogen in the tank. This is caused
by the corrosion protective action of the anode.
Smelly water may be eliminated or reduced in some water heater
models by replacing the anode(s) with one of less active material,
and then chlorinating the water heater tank and all water lines.
30
REPLACEMENT PARTS
SEQUENCE OF OPERATION FLOW CHART
Description of this flow chart can be found in the “SEQUENCE OF OPERATION” section found on page 23.
Switch power on
to unit.
Thermostat calls
for heat.
Ignition Control
Board performs
diagnostic check on
components
Ignition
Control Board
opens Gas
Valve.
Ignition Control
Board shuts off
Silicon Nitride
Ignitor after
3 seconds
Ignition Control
Board waits 3 more
seconds to
monitor Flame
Sensor.
Ignition Control
Board sends power
to Exhaust Inducer
Did Main
Burner Light?
Exhaust Inducer
engages Prover
Switch
YES
Ignition Control
Board provides
power to Silicon
Nitride Ignitor
Ignition Control
Board monitors
units until T’Stat
is satisfied.
Silicon Nitride
Ignitor
warms up for
20 seconds
FIGURE 29
31
NO
Ignition Control
Board shuts off Gas
Valve and allows the Exhaust
Inducer to
purge appliance for
20 seconds.
OPERATIONAL CHECKLIST
COMPLAINT
*Water not hot enough
CAUSE
USER
REMEDY
SERVICEMAN
Thermostat set too low.
Set thermostat dial to a higher
temperature
Thermostat out of calibration.
Call serviceman
*Insufficient hot water
Thermostat set too low.
*See WATER TEMPERATURE
CONTROL WARNING (on page
11).
Set thermostat dial to a higher
temperature
Thermostat out of calibration.
Call serviceman
Main manual gas shutoff valve
partially closed.
Open main manual gas shutoff
valve to fullest extent.
Heater too small for demand.
Space usage to give heater time
to restore water temperature.
Thermostat differential is too
wide.
Call serviceman
Heater recovery is slower.
Call serviceman
Water temperature too hot.
Thermostat set too high.
Set thermostat to a lower setting.
Heater makes sounds: sizzling.
Condensation on outside of
tank, normal.
Rumbling.
Sediment accumulation on
bottom of tank.
Ticking or metallic sounds.
Expansion and contraction normal.
Pounding.
Air chambers in piping have
become waterlogged.
Drain piping system and refill.
Heater must be off while this is
being done.
Combustion noises.
Too much primary air.
Call serviceman.
Overfired heater; Incorrect
burners or orifice for type of gas
used.
Call serviceman.
Drain valve not closed tightly.
If drain valve cannot be closed
tightly, replace.
If leakage source cannot be
corrected or identified, call
serviceman.
Shut off gas supply to heater
and close cold water inlet valve
to heater.
Repair or in case of suspecteed tank
leakage, be certain to confirm before
replacing heater.
Heater is over fired
Shut off gas supply to heater
and call a serviceman.
Check for sooted flue passage.
Water leaks.
Gas odors.
Recalibrate thermostat. If thermostat
cannot be recalibrated, replace.
Recalibrate thermostat. If thermostat
cannot be recalibrated, replace.
Check gas input. If incorrect, adjust gas
pressure or replace main burner orifice.
Drain a quantity of water through Delime heater.
drain valve. If rumbling persists,
call a serviceman.
Check and correct as necessary.
Check for obstructed vent line.
Check backdraft or lack of draft
Possible gas leaks.
Shut off gas supply to heater
and call gas company at once
32
33
ALT. COLD WATER
CONNECTION
HOT WATER
TO FIXTURES
NOTES:
1. Preferred piping diagram.
2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system.
3. Service valves are shown for servicing unit. However, local codes shall govern their usage.
4. The Tank Temperature Control should be wired to and control the pump between the water heater(s) and the storage tank(s).
5. The water heater’s operating thermostat should be set 5 degrees F higher than the Tank Temperature Control.
FINISHED
FLOOR
PIPE T&P TO
OPEN DRAIN
WARNING: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND OTHER DEVICES;
CHECK WITH LOCAL CODES AND ORDINANCES
FOR ADDITIONAL REQUIREMENTS.
MULTI FLUE - (1 UNIT) WITH VERTICAL STORAGE TANK
COLD WATER
SUPPLY
EXPANSION
TANK
DRAIN
WATER FLOW SWITCH
TEMPERATURE GAGE
CHECK VALVE
FULL PORT BALL VALVE
HOT WATER RETURN
FROM FIXTURES
TANK TEMPERATURE CONTROL
CIRCULATING PUMP
PRESSURE RELIEF VALVE
TEMPERATURE & PRESSURE
RELIEF VALVE
LEGEND
WATER PIPING DIAGRAMS
34
HOT WATER TO FIXTURES
ALTERNATE
LOCATION
NOTES:
1. Preferred piping diagram.
2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system.
3. Service valves are shown for servicing unit. However, local codes shall govern their usage.
4. The Tank Temperature Control should be wired to and control the pump between the water heater(s) and the storage tank(s).
5. The water heater’s operating thermostat should be set 5 degrees F higher than the Tank Temperature Control.
FINISHED
FLOOR
PIPE T&P TO
OPEN DRAIN
WARNING: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND OTHER DEVICES;
CHECK WITH LOCAL CODES AND ORDINANCES
FOR ADDITIONAL REQUIREMENTS.
MULTI FLUE - (1 UNIT) WITH HORIZONTAL STORAGE TANK
DRAIN
WATER FLOW SWITCH
TEMPERATURE GAGE
CHECK VALVE
FULL PORT BALL VALVE
EXPANSION
TANK
COLD WATER
SUPPLY
HOT WATER
RETURN FROM
FIXTURES
CIRCULATING PUMP
TANK TEMPERATURE CONTROL
CIRCULATING PUMP
PRESSURE RELIEF VALVE
TEMPERATURE & PRESSURE
RELIEF VALVE
LEGEND
35
HOT
WATER
RETURN
MINIMUM
10" TO 12"
TEMPERED
WATER
OUTLET
COLD
HOT
HOT
WATER
OUTLET
NOTES:
1. Preferred piping diagram.
2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system.
3. Service valves are shown for servicing unit. However, local codes shall govern their usage.
4. The Tank Temperature Control should be wired to and control the pump between the water heater(s) and the storage tank(s).
EXPANSION
TANK
COLD WATER
SUPPLY
TEMPERED
WATER
RETURN
WARNING: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND OTHER DEVICES;
CHECK WITH LOCAL CODES AND ORDINANCES
FOR ADDITIONAL REQUIREMENTS.
MULTI FLUE - (1 UNIT) WITH MIXING VALVE TWO TEMPERATURE
DRAIN
PIPE T&P TO
OPEN DRAIN
TANK TEMPERATURE CONTROL
CIRCULATING PUMP
PRESSURE RELIEF VALVE
TEMPERATURE & PRESSURE
RELIEF VALVE
LEGEND
WATER FLOW SWITCH
TEMPERATURE GAGE
CHECK VALVE
FULL PORT BALL VALVE
36
PIPE T&P TO
OPEN DRAIN
NOTES:
1. Preferred piping diagram.
2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system.
3. Service valves are shown for servicing unit. However, local codes shall govern their usage.
4. The Tank Temperature Control should be wired to and control the pump between the water heater(s) and the storage tank(s).
PIPE T&P TO
OPEN DRAIN
HOT WATER
TO FIXTURES
WARNING: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND OTHER DEVICES;
CHECK WITH LOCAL CODES AND ORDINANCES
FOR ADDITIONAL REQUIREMENTS.
MULTI FLUE - (2 UNITS)
COLD WATER
SUPPLY
EXPANSION
TANK
DRAIN
TANK TEMPERATURE CONTROL
CIRCULATING PUMP
PRESSURE RELIEF VALVE
TEMPERATURE & PRESSURE
RELIEF VALVE
WATER FLOW SWITCH
TEMPERATURE GAGE
CHECK VALVE
FULL PORT BALL VALVE
HOT WATER
RETURN
LEGEND
37
PIPE T&P TO
OPEN DRAIN
NOTES:
1. Preferred piping diagram.
2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system.
3. Service valves are shown for servicing unit. However, local codes shall govern their usage.
4. The Tank Temperature Control should be wired to and control the pump between the water heater(s) and the storage tank(s).
5. The water heater’s operating thermostat should be set 5 degrees F higher than the Tank Temperature Control.
FINISHED
FLOOR
PIPE T&P TO
OPEN DRAIN
WARNING: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND OTHER DEVICES;
CHECK WITH LOCAL CODES AND ORDINANCES
FOR ADDITIONAL REQUIREMENTS.
MULTI FLUE - (2 UNITS) WITH VERTICAL STORAGE TANK
ALTERNATE
COLD WATER
CONNECTION
HOT WATER
TO FIXTURES
DRAIN
TANK TEMPERATURE CONTROL
CIRCULATING PUMP
PRESSURE RELIEF VALVE
TEMPERATURE & PRESSURE
RELIEF VALVE
COLD WATER
SUPPLY
HOT WATER
RETURN
WATER FLOW SWITCH
TEMPERATURE GAGE
CHECK VALVE
FULL PORT BALL VALVE
EXPANSION
TANK
LEGEND
38
PIPE T&P TO
OPEN DRAIN
NOTES:
1. Preferred piping diagram.
2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system.
3. Service valves are shown for servicing unit. However, local codes shall govern their usage.
4. The Tank Temperature Control should be wired to and control the pump between the water heater(s) and the storage tank(s).
5. The water heater’s operating thermostat should be set 5 degrees F higher than the Tank Temperature Control.
FINISHED
FLOOR
PIPE T&P TO
OPEN DRAIN
WARNING: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND OTHER DEVICES;
CHECK WITH LOCAL CODES AND ORDINANCES
FOR ADDITIONAL REQUIREMENTS.
MULTI FLUE - (2 UNITS) WITH VERTICAL STORAGE TANK
ALTERNATE
COLD WATER
CONNECTION
HOT WATER
TO FIXTURES
DRAIN
TANK TEMPERATURE CONTROL
CIRCULATING PUMP
PRESSURE RELIEF VALVE
TEMPERATURE & PRESSURE
RELIEF VALVE
COLD WATER
SUPPLY
HOT WATER
RETURN
WATER FLOW SWITCH
TEMPERATURE GAGE
CHECK VALVE
FULL PORT BALL VALVE
EXPANSION
TANK
LEGEND
39
PIPE T&P TO
OPEN DRAIN
HOT WATER TO FIXTURES
DRAIN
EXPANSION
TANK
COLD WATER
SUPPLY
TANK TEMPERATURE CONTROL
CIRCULATING PUMP
PRESSURE RELIEF VALVE
TEMPERATURE & PRESSURE
RELIEF VALVE
ALTERNATE
LOCATION
NOTES:
1. Preferred piping diagram.
2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system.
3. Service valves are shown for servicing unit. However, local codes shall govern their usage.
4. The Tank Temperature Control should be wired to and control the pump between the water heater(s) and the storage tank(s).
5. The water heater’s operating thermostat should be set 5 degrees F higher than the Tank Temperature Control.
FINISHED
FLOOR
PIPE T&P TO
OPEN DRAIN
WARNING: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND OTHER DEVICES;
CHECK WITH LOCAL CODES AND ORDINANCES
FOR ADDITIONAL REQUIREMENTS.
MULTI FLUE - (2 UNITS) WITH HORIZONTAL STORAGE TANK
LEGEND
HOT WATER
RETURN FROM
FIXTURES
WATER FLOW SWITCH
TEMPERATURE GAGE
CHECK VALVE
FULL PORT BALL VALVE
40
EXPANSION TANK
COLD WATER
SUPPLY
HOT WATER
RETURN
HOT WATER
TO FIXTURES
PRE-HEATED
WATER TO
BOOSTER
DRAIN
BOOSTER
HEATER
WATER FLOW SWITCH
TEMPERATURE GAGE
CHECK VALVE
FULL PORT BALL VALVE
BOOSTER WATER RETURN
TANK TEMPERATURE CONTROL
CIRCULATING PUMP
PRESSURE RELIEF VALVE
TEMPERATURE & PRESSURE
RELIEF VALVE
BOOSTER WATER
TO FIXTURES
NOTES:
1. Preferred piping diagram.
2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system.
3. Service valves are shown for servicing unit. However, local codes shall govern their usage.
1st HEATER
WARNING: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND OTHER DEVICES;
CHECK WITH LOCAL CODES AND ORDINANCES
FOR ADDITIONAL REQUIREMENTS.
MULTI FLUE (2 UNITS) TWO TEMPERATURE
LEGEND
41
PRE-HEATER
PRE-HEATER
MUST BE IDENTICAL HEATERS
PIPE T&P TO
OPEN DRAIN
DRAIN
BOOSTER RETURN
(IF USED)
EXPANSION
TANK
COLD WATER
SUPPLY
TANK TEMPERATURE CONTROL
CIRCULATING PUMP
PRESSURE RELIEF VALVE
TEMPERATURE & PRESSURE
RELIEF VALVE
HOT OUTLET
AT STORED
TEMPERATURE
BOOSTED
WATER
OUTLET
TYPICAL
BOOSTER
HEATER
PIPE T&P TO
OPEN DRAIN
NOTES:
1. Preferred piping diagram.
2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system.
3. Service valves are shown for servicing unit. However, local codes shall govern their usage.
FINISHED FLOOR
PIPE T&P TO
OPEN DRAIN
WARNING: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND OTHER DEVICES;
CHECK WITH LOCAL CODES AND ORDINANCES
FOR ADDITIONAL REQUIREMENTS.
MULTI FLUE (2 UNITS) WITH BOOSTER TWO TEMPERATURE
LEGEND
HOT WATER
RETURN
WATER FLOW SWITCH
TEMPERATURE GAGE
CHECK VALVE
FULL PORT BALL VALVE
42
PIPE T&P TO
OPEN DRAIN
PIPE T&P TO
OPEN DRAIN
NOTES:
1. Preferred piping diagram.
2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system.
3. Service valves are shown for servicing unit. However, local codes shall govern their usage.
PIPE T&P TO
OPEN DRAIN
HOT WATER
TO FIXTURES
WARNING: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND OTHER DEVICES;
CHECK WITH LOCAL CODES AND ORDINANCES
FOR ADDITIONAL REQUIREMENTS.
MULTI-FLUE (3 UNITS)
DRAIN
EXPANSION
TANK
COLD WATER
SUPPLY
TANK TEMPERATURE CONTROL
CIRCULATING PUMP
PRESSURE RELIEF VALVE
TEMPERATURE & PRESSURE
RELIEF VALVE
LEGEND
HOT WATER
RETURN
WATER FLOW SWITCH
TEMPERATURE GAGE
CHECK VALVE
FULL PORT BALL VALVE
43
PIPE T&P TO
OPEN DRAIN
HEATER
PIPE T&P TO
OPEN DRAIN
HEATER
PIPE T&P TO
OPEN DRAIN
DRAIN
TANK TEMPERATURE CONTROL
CIRCULATING PUMP
PRESSURE RELIEF VALVE
ALT. COLD WATER
CONNECTION
EXPANSION TANK
HOT WATER
RETURN
WATER FLOW SWITCH
TEMPERATURE GAGE
CHECK VALVE
FULL PORT BALL VALVE
COLD WATER
SUPPLY
LEGEND
TEMPERATURE & PRESSURE
RELIEF VALVE
HOT WATER TO FIXTURES
NOTES:
1. Preferred piping diagram.
2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system.
3. Service valves are shown for servicing unit. However, local codes shall govern their usage.
4. The Tank Temperature Control should be wired to and control the pump between the water heater(s) and the storage tank(s).
5. The water heater’s operating thermostat should be set 5 degrees F higher than the Tank Temperature Control.
FINISHED FLOOR
PIPE T&P TO
OPEN DRAIN
HEATER
WARNING: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND OTHER DEVICES;
CHECK WITH LOCAL CODES AND ORDINANCES
FOR ADDITIONAL REQUIREMENTS.
MULTI-FLUE (3 UNITS) WITH VERTICAL STORAGE TANK
AOS
STORAGE TANK
44
HEATER
PIPE T&P TO
OPEN DRAIN
HEATER
PIPE T&P TO
OPEN DRAIN
HEATER
AOS
STORAGE TANK
HOT WATER TO FIXTURES
NOTES:
1. Preferred piping diagram.
2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system.
3. Service valves are shown for servicing unit. However, local codes shall govern their usage.
4. The Tank Temperature Control should be wired to and control the pump between the water heater(s) and the storage tank(s).
5. The water heater’s operating thermostat should be set 5 degrees F higher than the Tank Temperature Control.
FINISHED FLOOR
PIPE T&P TO
OPEN DRAIN
WARNING: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND OTHER DEVICES;
CHECK WITH LOCAL CODES AND ORDINANCES
FOR ADDITIONAL REQUIREMENTS.
MULTI-FLUE (3 UNITS) WITH HORIZONTAL STORAGE TANK
ALTERNATE
LOCATION
PIPE T&P TO
OPEN DRAIN
DRAIN
TANK TEMPERATURE CONTROL
CIRCULATING PUMP
PRESSURE RELIEF VALVE
TEMPERATURE & PRESSURE
RELIEF VALVE
LEGEND
EXPANSION TANK
COLD WATER
SUPPLY
HOT WATER
RETURN
WATER FLOW SWITCH
TEMPERATURE GAGE
CHECK VALVE
FULL PORT BALL VALVE
45
PIPE T&P TO
OPEN DRAIN
PIPE T&P TO
OPEN DRAIN
PIPE T&P TO
OPEN DRAIN
NOTES:
1. Preferred piping diagram.
2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system.
3. Service valves are shown for servicing unit. However, local codes shall govern their usage.
FINISHED FLOOR
HOT WATER
TO FIXTURES
WARNING: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND OTHER DEVICES;
CHECK WITH LOCAL CODES AND ORDINANCES
FOR ADDITIONAL REQUIREMENTS.
MULTI FLUE FLUE (4 UNITS)
PIPE T&P TO
OPEN DRAIN
DRAIN
HOT WATER
RETURN
WATER FLOW SWITCH
TEMPERATURE GAGE
CHECK VALVE
FULL PORT BALL VALVE
COLD WATER
SUPPLY
EXPANSION
TANK
TANK TEMPERATURE CONTROL
CIRCULATING PUMP
PRESSURE RELIEF VALVE
TEMPERATURE & PRESSURE
RELIEF VALVE
LEGEND
46
HEATER
HEATER
PIPE T&P TO
OPEN DRAIN
HEATER
PIPE T&P TO
OPEN DRAIN
PIPE T&P TO
OPEN DRAIN
NOTES:
1. Preferred piping diagram.
2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system.
3. Service valves are shown for servicing unit. However, local codes shall govern their usage.
4. The Tank Temperature Control should be wired to and control the pump between the water heater(s) and the storage tank(s).
5. The water heater’s operating thermostat should be set 5 degrees F higher than the Tank Temperature Control.
FINISHED FLOOR
PIPE T&P TO
OPEN DRAIN
HEATER
PIPE T&P TO
OPEN DRAIN
WARNING: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND OTHER DEVICES;
CHECK WITH LOCAL CODES AND ORDINANCES
FOR ADDITIONAL REQUIREMENTS.
MULTI-FLUE (4 UNITS) WITH VERTICAL STORAGE TANK
AOS
STORAGE TANK
ALT. COLD
WATER
CONNECTION
HOT WATER
TO FIXTURES
DRAIN
WATER FLOW SWITCH
TEMPERATURE GAGE
CHECK VALVE
FULL PORT BALL VALVE
EXPANSION
TANK
COLD WATER
SUPPLY
HOT WATER
RETURN
TANK TEMPERATURE CONTROL
CIRCULATING PUMP
PRESSURE RELIEF VALVE
TEMPERATURE & PRESSURE
RELIEF VALVE
LEGEND
47
HEATER
HEATER
PIPE T&P TO
OPEN DRAIN
HEATER
PIPE T&P TO
OPEN DRAIN
DRAIN
AOS
STORAGE TANK
ALTERNATE
LOCATION
PIPE T&P TO
OPEN DRAIN
TANK TEMPERATURE CONTROL
CIRCULATING PUMP
PRESSURE RELIEF VALVE
TEMPERATURE & PRESSURE
RELIEF VALVE
HOT WATER
TO FIXTURES
NOTES:
1. Preferred piping diagram.
2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system.
3. Service valves are shown for servicing unit. However, local codes shall govern their usage.
4. The Tank Temperature Control should be wired to and control the pump between the water heater(s) and the storage tank(s).
5. The water heater’s operating thermostat should be set 5 degrees F higher than the Tank Temperature Control.
FINISHED FLOOR
PIPE T&P TO
OPEN DRAIN
HEATER
PIPE T&P TO
OPEN DRAIN
WARNING: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND OTHER DEVICES;
CHECK WITH LOCAL CODES AND ORDINANCES
FOR ADDITIONAL REQUIREMENTS.
MULTI-FLUE (4 UNITS) WITH HORIZONTAL STORAGE TANK
LEGEND
EXPANSION TANK
COLD WATER
SUPPLY
HOT WATER
RETURN
WATER FLOW SWITCH
TEMPERATURE GAGE
CHECK VALVE
FULL PORT BALL VALVE
Limited Warranty
A. O. Smith Corporation, the warrantor, extends the following LIMITED WARRANTY to the owner of this water heater.
1.
THE TANK
If the glass-lined tank in this water heater shall prove upon examination by the warrantor to have leaked due to natural corrosion from potable water
THREE years after initial installation, the warrantor will supply a complete new A. O. Smith water heater of equivalent size and
therein, during the
current model. Some government agencies are requiring energy
standards for water heaters. In the event regulations prohibit sale of a model
of equivalent size and construction, A. O. Smith will provide a model which complies with the regulations of your area, in which case the consumer
will be charged the difference in price between the like replacement and the energy
model required. The warranty on the replacement water
heater will be limited to the unexpired term of the original warranty.
2.
ALL OTHER PARTS
If within ONE year after initial installation of this water heater, any part or portion shall prove upon examination by the warrantor to be defective in
material or workmanship, the warrantor will repair or replace such part or portion at its option.
3.
CONDITIONS AND EXCEPTIONS
This warranty shall apply only when the water heater is installed in accordance with local plumbing and building codes, ordinances and regulations,
by and
the printed instructions provided with it and good industry practices. In addition, a temperature and pressure relief valve,
sanctioned and recognized independent testing agency and approved by the American Society of Mechanical Engineers, must have been installed.
a.
This warranty shall apply only when the heater is:
(1) used at temperatures not exceeding the maximum calibrated setting of its thermostat;
(2) used at water pressure not exceeding the working pressure shown on the heater;
(3)
with potable water, free to circulate at all times and with the tank free of damaging water sediment or scale deposits;
(4) used in a non-corrosive and non-contaminated atmosphere;
(5) used with factory approved anode(s) installed;
(6) in its original installation location;
(7) in the United States, its territories or possessions or Canada;
(8) sized in accordance with proper sizing techniques for commercial and/or residential water heaters;
(9) bearing a rating plate which has not been altered, defaced or removed, except as required by the warrantor;
(10) used in an open system or in a closed system with properly sized and installed thermal expansion tank;
(11) operated with properly installed dirt leg;
with the fuel for which it was factory built;
(12)
(13)
at the factory rated input;
(14) operated with the inner and outer combustion chamber doors in place.
b. Any accident to the water heater, any misuse, abuse (including freezing or thermal expansion damage) or alteration of, any operation in a
form, or any attempt to repair tank leaks will void this warranty.
c. This warranty is void if a device acting as a
prevention device (check valves etc.) is installed in the cold water supply the heater is connected to, unless an effective method of controlling thermal expansion is also installed at the heater(s) and operational at all times. The relief
valve installed on the heater is not an acceptable method.
4.
SERVICE AND REPAIR EXPENSES
Under the limited warranty the warrantor will provide only a replacement water heater or part thereof. The owner is responsible for all other costs.
Such costs may include but are not limited to:
a. Labor charges for service removal, repair or reinstallation of the water heater or any component part;
b. Shipping, delivery, handling, and administrative charges for forwarding the new heater or replacement part from the nearest distributor and
returning the claimed defective heater or part to such distributor.
c. All cost necessary or incidental for any material and/or permits required for installation of the replacement heater or part.
5.
LIMITATIONS ON IMPLIED WARRANTIES
Implied warranties, including the warranty of merchantability imposed on the sale of this heater under state law or local code are limited to one (1)
year duration for the heater or any of its parts. Some areas do not allow limitation on how long an implied warranty lasts, so the above limitation may
not apply to you.
6.
CLAIM PROCEDURE
Any claim under the warranty should be initiated with the dealer who sold the heater, or with any other dealer handling the warrantor’s products. If
this is not practicable, the owner should contact:
U.S. Customers
A. O. Smith Water Products Company
500 Tennessee Waltz Parkway
Ashland City, TN 37015
Telephone: (800) 323-2636
a. The warrantor will only honor replacement with identical or similar water heater or parts thereof which are manufactured or distributed by the
warrantor.
b. Dealer replacements are made subject to in-warranty validation by warrantor.
7.
DISCLAIMERS
NO OTHER EXPRESS WARRANTY HAS BEEN OR WILL BE MADE IN BEHALF OF THE WARRANTOR WITH RESPECT TO THE MERCHANTABILITY OF THE HEATER OR THE INSTALLATION, OPERATION, REPAIR OR REPLACEMENT OF THE HEATER. THE WARRANTOR SHALL NOT
BE RESPONSIBLE FOR WATER DAMAGE, LOSS OF USE OF THE UNIT, INCONVENIENCE, LOSS OR DAMAGE TO PERSONAL PROPERTY
OR OTHER CONSEQUENTIAL DAMAGE. THE WARRANTOR SHALL NOT BE LIABLE BY VIRTUE OF THIS WARRANTY OR OTHERWISE FOR
DAMAGE TO ANY PERSONS OR PROPERTY, WHETHER DIRECT OR INDIRECT, AND WHETHER ARISING IN CONTRACT OR IN TORT.
a. Some areas do not allow the exclusion or limitation of the incidental or consequential damage, so the above limitations or exclusions may not
apply to you.
legal rights, and you may also have other rights which vary from area to area.
b. This warranty gives you
Fill in the following for your own reference. Keep it. Registration is not a condition of warranty. The model and serial number are found on the heater’s
rating plate.
Model No. ____________________Serial No. _____________________________________________Date Installed__________________________
Dealer’s Name____________________________________________________________________________________________________________
Dealer’s Address ________________________________________________________________________ Phone No.________________________
City and State __________________________________________________________________________ Zip _____________________________
KEEP THIS WARRANTY POSTED ADJACENT TO THE HEATER FOR FUTURE REFERENCE.
48
39
NOTES
NOTES
NOTES
500 Tennessee Waltz Pkwy., Ashland City, TN 37015
Technical Support: 800-527-1953 • Parts: 800-433-2545 • Fax: 800-644-9306
www.hotwater.com
Copyright © 2010 A.O. Smith Corporation, All rights reserved.
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