A.O. Smith 104 Series User manual
- Category
- Water heaters & boilers
- Type
- User manual
COMMERCIAL GAS WATER HEATERS
Instruction Manual
PRINTED 0814 194186-003
PLACE THESE INSTRUCTIONS ADJACENT TO HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.
MODELS BTP 139(A) Thru 370(A)
SERIES 104/105
INSTALLATION - OPERATION - SERVICE
- MAINTENANCE - LIMITED WARRANTY
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.
This manual must remain with the
water heater.
500 Tennessee Waltz Parkway
Ashland City, TN 37015
Low Lead Content
Thank yRX IRr EXyinJ this enerJy eI¿Fient water heater
We aSSreFiate yRXr FRn¿denFe in RXr SrRdXFts
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.
2
Air )rRP 2ther IndRRr 6SaFes 18
9ent CRnneFtiRn 19
WATER HEATER INSTALLATION 19-22
Water Line CRnneFtiRns 19
TP 9alYe DisFharJe PiSe 19
Installation Diagrams - Top Inlet/Outlet Usage 20
Burner Installation 20
Heater Wiring 21
Gas Piping 22
Gas Line Leak Testing 22
Purging 22
STARTUP AND OPERATION 23
Prior to Start Up 23
SEQUENCE OF OPERATION 23-27
SeTuenFe oI Operation Flow Chart 24
Lighting & Operation Label 25
Adjustments
26
CheFking 9enting 26
CheFking the Input 26
Setting Burner Operation 27
MAINTENANCE 28-32
9enting System and BarometriF DraIt Control 28
General 28
Remote Storage Tank Temperature Control 28
Temperature-Pressure Relief Valve Test 28
Anode Rod InspeFtion 29
Draining and Flushing 29
ReFommended ProFedure for PeriodiF Removal or Lime Deposits
from the Tank Type CommerFial Water Heaters 29
DeLiming Solvents 30
Tank Cleanout ProFedure 30
Deliming Using Flo-Jug Method 30-31
Power Burner 31-32
Gas Control Valve 32
SERVICE 32
EleFtriFal ServiFing 32
TROUBLESHOOTING CHECKLIST
33
FOR YOUR INFORMATION 34
Start up Conditions 34
Operational Conditions 34
WATER PIPING DIAGRAMS 35-49
MANIFOLD KITS 50
REPLACEMENT PARTS LIST 51- 52
NOTES 53-54
WARRANTY 55
TABLE OF CONTENTS
SAFE INSTALLATION, USE AND SERVICE 3
APPROVALS 3
GENERAL SAFETY INFORMATION 4-5
PreFautions 5
Grounding InstruFtions 5
Hydrogen Gas Flammable 5
INTRODUCTION 6
Abbreviations Used 6
Quali¿Fations 6
Start Up Requirements 6
Preparing for the Installation 6
FEATURES AND COMPONENTS 7
High Limit SwitFh 7
EleFtroniF Ignition Control 7
BarometriF Draft Control 7
Combustion Chamber Observation Port 7
UnFrating 7
INSTALLATION CONSIDERATIONS 8-12
Rough In Dimensions 8
LoFating The Water Heater 10
ClearanFes 10
Insulation Blanket 11
Hard Water 11
CirFulation Pumps 11-12
High Altitude Installations 12
INSTALLATION REQUIREMENTS 13-16
Gas Supply Systems 13
Supply Gas Regulator 13
Power Supply 13
Water Temperature Control and Mixing Valves 13
Dishwashing MaFhines 14
Closed Water Systems 14
Thermal Expansion 14
Temperature-Pressure Relief Valve 14-15
Contaminated Air 15
Air Requirements 15
UnFon¿ned SpaFe 16
Con¿ned SpaFe 16
VENTING INSTALLATION 16-19
Venting 16
BarometriF Draft Control Assembly 16
Fresh Air Opening for Con¿ned SpaFes 17
Outdoor Air Through Two Openings 17
Outdoor Air Through One Opening 17
Outdoor Air Through Two Horizontal DuF
ts 17
Outdoor Air Through Two VertiFal DuFts 18
3
SAFE INSTALLATION, USE AND SERVICE
The proper installation, use and serviFing of this water heater is extremely important to your safety and the safety of others
Many safety-related messages and instruFtions 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 instruFtions throughout this manual It is very important
that the meaning of eaFh safety message is understood by you and others who install, use, or serviFe this water heater
All safety messages will generally tell you about the type of hazard, what Fan happen if you do not follow the safety message, and
how to avoid the risk of injury
The California Safe Drinking Water and ToxiF EnforFement AFt requires the Governor of California to publish a list of substanFes
known to the State of California to Fause FanFer, birth defeFts, or other reproduFtive harm, and requires businesses to warn of
potential exposure to suFh substanFes
WARNING: This produFt Fontains a FhemiFal known to the State of California to Fause FanFer, birth defeFts, or other reproduFtive
harm This applianFe Fan Fause low level exposure to some of the substanFes listed in the AFt
DANGER
WARNING
CAUTION
CAUTION
DANGER indicates an imminently
hazardous situation which, if not avoided,
will result in injury or death.
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.
WARNING indicates a potentially hazardous
situation which, if not avoided, could result
in injury or death.
CAUTION indicates a potentially hazardous
situation which, if not avoided, could result in
minor or moderate injury.
CAUTION used without the safety alert
symbol indicates a potentially hazardous
situation which, if not avoided, could result in
property damage.
APPROVALS
Note: ASME FonstruFtion is optional on the water heaters Fovered in this manual
Low Lead Content
4
GENERAL SAFETY INFORMATION
Fire or Explosion Hazard
Read instruction manual before
installing, using or servicing
water heater.
Avoid all ignition sources if you smell gas.
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
Use only the gas shown on the water heater rating label.
Keep ignition sources away from faucets after extended
periods of non-use.
Maintain required clearances to combustibles.
Do not expose water heater controls to excessive gas
pressure.
Property Damage Hazard
All water heaters eventually leak.
Do not install without adequate drainage.
CAUTION
Fire and Explosion Hazard
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.
Use joint compound or Teflon tape
compatible with propane gas.
Turn off power to the water heater
before performing any service.
Electrical Shock Hazard
Label all wires prior to disconnecting
when performing service. Wiring errors
can cause improper and dangerous
operation.
Verify proper operation after servicing.
Failure to follow these instructions can
result in personal injury or death.
Fire Hazard
For continued protection against
risk of fire:
Do not install water heater on
carpeted floor.
Do not operate water heater if
any part has been exposed to
flooding or water damage.
Fire and Explosion Hazard
Turn off gas lines during installation.
Contact a qualified installer or service
technician for installation and service.
Excessive gas pressure to gas valve can
cause serious injury or death.
Do not use water heater with any gas
other than the gas shown on the rating
label.
Jumping out control circuits or components can
result in property damage, personal injury or death.
Service should only be performed by a qualified service
technician 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.
Any bypass or alteration of the water
heater controls and/or wiring will result
in voiding the water heater 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.
5
PRECAUTIONS
DO NOT USE THIS WATER HEATER IF ANY PART HAS
BEEN E;POSED TO FLOODING OR WATER DAMAGE
Immediately Fall a qualified serviFe teFhniFian to inspeFt the
water heater 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 ForreFtive steps have been made by a qualified
serviFe teFhniFian
1 External ¿re
2 Damage
3 Firing without water
GROUNDING INSTRUCTIONS
This water heater must be grounded in aFFordanFe with the
National EleFtriFal Code and/or loFal Fodes These must be
followed in all Fases
This water heater must be FonneFted to a grounded, permanent
wiring system or an equipment grounding FonduFtor must be
run with the FirFuit FonduFtors and FonneFted to the equipment
grounding terminal or lead on the water heater, see Figure 19
HYDROGEN GAS FLAMMABLE
Explosion Hazard
Flammable hydrogen gases
may be present.
Keep all ignition sources away
from faucet when turning on
hot water.
Hydrogen gas Fan be produFed in a hot water system served
by this water heater that has not been used for a long period of
time generally two weeks or more Hydrogen gas is extremely
Àammable To re du Fe the risk of injury under these Fonditions,
it is reFommended that a hot water fauFet served by this water
heater be opened for several minutes before using any eleFtriFal
applianFe FonneFted to the hot water system If hydrogen is
present there will probably be an unusual sound suFh as air
esFaping through the pipe as the water begins to Àow THERE
SHOULD BE NO SMOKING OR OPEN FLAME NEAR THE
FAUCET AT THE TIME IT IS OPEN
GENERAL SAFETY INFORMATION
Verify the power to the water heater is turned off before performing any service procedures.
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.
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.
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.
Explosion Hazard
Overheated water can cause
water tank explosion.
Properly sized temperature and
pressure relief valve must be
installed in the opening provided.
GENERAL SAFETY INFORMATION
Improper installation, use and service may result
in property damage.
Do not operate water heater if any part has been exposed
to flooding or water damage.
Inspect 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.
CAUTION
6
INTRODUCTION
Thank You for purFhasing this water heater Properly installed
and maintained, it should give you years of trouble free serviFe
ABBREVIATIONS USED
Abbreviations found in this InstruFtion Manual inFlude
ANSI - AmeriFan National Standards Institute
ASME - AmeriFan SoFiety of MeFhaniFal Engineers
AHRI - Air-Conditioning, Heating and Refrigeration Institute
NEC - National EleFtriFal Code
NFPA - National Fire ProteFtion AssoFiation
UL - Underwriters Laboratory
CSA - Canadian Standards AssoFiation
QUALIFICATIONS
QUALIFIED INSTALLER OR SERVICE AGENCY
Installation and serviFe of this water heater requires ability
equivalent to that of a Quali¿ed AgenFy as de¿ned by ANSI
below in the ¿eld involved Installation skills suFh as plumbing,
air supply, venting, gas supply and eleFtriFal supply are required
in addition to eleFtriFal testing skills when performing serviFe
ANSI Z223.1 2006 Sec. 3.3.83: ³Quali¿ed AgenFy´ - ³Any
individual, ¿rm, Forporation or Fompany that either in person or
through a representative is engaged in and is responsible for (a)
the installation, testing or replaFement of gas piping or (b) the
FonneFtion, installation, testing, repair or serviFing of applianFes
and equipment that is experienFed in suFh work that is familiar
with all preFautions required and that has Fomplied with all the
requirements of the authority having jurisdiFtion´
If you are not quali¿ed (as de¿ned by ANSI above) and liFensed
or Ferti¿ed as required by the authority having jurisdiFtion
to perform a given task do not attempt to perform any of the
proF
edures desFribed in this manual If you do not understand
the instruFtions given in this manual do not attempt to perform
any proFedures outlined in this manual
START UP REQUIREMENTS
This produFt requires a formal Start-Up by an authorized
serviFe/
start-up provider that has been approved by the manufaFturer
for this speFi¿F produFt Call 1-800-527-1953 to loFate the
nearest authorized start-up provider and arrange a faFtory
start-up Please provide as muFh notiFe as possible, preferably
2 weeks Please have the model and serial number ready when
you Fall
This start-up is required to aFtivate the warranty and ensure
safe, ef¿Fient operation
Warranty on this produFt is limited and Fould be void in the
event the unit is not installed per the instruFtions in this manual
and/or not started up by an authorized faFtory trained serviFe/
start-up provider
PREPARING FOR THE INSTALLATION
1 Read the ³General Safety´ seFtion, page 4-5 of this manual
first and then the entire manual Farefully If you don¶t follow
the safety rules, the water heater will not operate properly
It Fould Fause DEATH, SERIOUS BODILY INJURY AND/OR
PROPERTY DAMAGE
This manual Fontains instruFtions for the installation, operation,
and maintenanFe of the gas-¿red water heater It also Fontains
warnings throughout the manual that you must read and be
aware of All warnings and all instruFtions are essential to the
proper operation of the water heater and your safety SinFe we
Fannot put everything on the ¿rst few pages, READ THE ENTIRE
MANUAL BEFORE ATTEMPTING TO INSTALL OR OPERATE
THE WATER HEATER
2 The installation must Fonform with these instruFtions and the
loFal Fode authority having jurisdiFtion In the absenFe of loFal
Fodes, the installation must Fomply with the Furrent editions
of the National Fuel Gas Code, ANSI =2231/NFPA 54 or CAN/
CSA-B1491 the Natural Gas and Propane Installation Code
All doFuments are available from the Canadian Standards
AssoFiation, 8501 East Pleasant Valley Road, Cleveland, OH
44131 NFPA doFuments are also available from the National
Fire ProteFtion AssoFiation, 1 BatterymarFh Park, QuinFy, MA
02269
3 If after reading this manual you have any questions or do
not understand any portion of the instruFtions, Fall the loFal
gas utility or the manufaFturer whose name appears on the
rating plate
4 Carefully plan the plaFe where you are going to put the
water heater CorreFt Fombustion, vent aFtion, and vent pipe
installation are very important in preventing death from possible
Farbon monoxide poisoning and ¿res
Examine the loFation to ensure the water heater Fomplies with
the ³LoFating the New Water Heater´ seFtion in this manual
5 For California installation this water heater must be braFed,
anFhored, or strapped to avoid falling or moving during
an earthquake See instruFtions for ForreFt installation
proFedures InstruFtions may be obtained from California
OffiFe of the State ArFhiteFt, 400 P Street, SaFramento,
CA 95814
6 MassaFhusetts Code requires this water heater to be installed in
aFFordanFe with MassaFhusetts 248-CMR 200 State Plumbing
Code and 248-CMR 500
7
HIGH LIMIT SWITCH
The dual bulb Fontroller (¿g 1) Fontains the high limit (energy Futoff)
sensor The high limit switFh interrupts main burner gas Àow should
the water temperature reaFh 205F (96C)
In the event of high limit switFh operation, the applianFe Fannot be
restarted unless the water temperature is reduFed by at least 20F
(11C) and the high limit reset button on front of limit Fontrol (¿g1)
is depressed
Continued manual resetting of high limit Fontrol, preFeded by higher
than usual water temperature is evidenFe of high limit switFh operation
The following is a possible reason for high limit switFh operation
A malfunFtion in the thermostatiF Fontrols would allow the gas
Fontrol valve to remain open Fausing water temperature to
exFeed the thermostat setting The water temperature would
Fontinue to rise until high limit switFh operation
ContaFt your dealer or serviFe agent if Fontinued high limit switFh
operation oFFurs
DIGITAL THERMOSTAT
FIGURE 1.
ELECTRONIC IGNITION CONTROL
EaFh heater is equipped with a Honeywell ignition module The
DireFt Spark Ignition Control Module Fontrols the ignition
sequenFe and gas Fontrol operation of the water heater
IGNITION MODULE
FIGURE 2.
BAROMETRIC DRAFT CONTROL
The heater is equipped with a double aFting barometriF draft
Fontrol This Fontrol assembly is faFtory adjusted to automatiFally
regulate the Fhimney draft imposed on the unit
BAROMETRIC DRAFT CONTROL
FIGURE 3.
COMBUSTION CHAMBER OBSERVATION PORT
The Fombustion Fhamber observation aFFess panel is loFated
above and to the left of the burner A plug loFated under the
panel, see fig 5, is inser ted into the Fombustion Fhamber wall
This plug should not be removed exFept, in rare Fases, when
the Fombustion Fhamber requires Fleaning or replaFement
FIGURE 4.
UNCRATING
UnFrate the heater by removing the outside mat and top loFator
The shipping pallet must be removed from the unit It may be
possible to simply unbolt the base from the pallet and, with
the help of 2 or more persons, work the unit off the pallet
Some units will be too heavy and will require the use of jaFks
or lifting equipment to safely remove the pallet and move the
unit into position Be Fareful when moving this heater It will
tip over easily
The heater is shipped with a burner and draft Fontrol The
burner and draft Fontrol are shipped in separate Fartons They
should be installed as reFeived without any alterations
DisFard the shipping Frate and paFkaging Fartons in an
appropriate manner
FEATURES AND COMPONENTS
8
ROUGH IN DIMENSIONS
INSTALLATION CONSIDERATIONS
FIGURE 5.
TABLE 1 . MODELS BTP-139(A) THROUGH BTP-370(A)
MODELS A B
C
DE G
H
JGAS
APPROX. SHIP. WT.
(LBS.)
IN OUT
ASME STD.
BTP-139/A 74 3/4"
65
"
26 3/4
" 6" 21 3/8"
27 3/4
" 38" 85 1/4" 1/2 658 556 1 1/2" 1 1/2"
BTP-199/A 74 3/4"
65
"
26 3/4
" 6" 21 3/8"
27 3/4
" 38" 85 1/4" 1/2 635 545 1 1/2" 1 1/2"
BTP-270/A 74 3/4"
65
"
26 3/4
" 8" 21 3/8"
27 3/4
" 38" 85 1/4" 3/4 632 547 1 1/2" 1 1/2"
BTP-370/A 74 3/4"
65
"
26 3/4
" 8" 21 3/8"
27 3/4
" 38" 85 1/4" 3/4 731 634 1 1/2" 1 1/2"
9
TABLE 2. HEATER PERFORMANCE DATA BTP MODELS
MODELS
STORAGE
CAPACITY
U.S. GALLONS
IMPUT RATING BTU/HR.
RECOVERY RATE
GPH@100°F RISE
RECOVERY RATE
GPH@140°F RISE
MAXIMUM
AMPERES
120V, 60Hz, 10
BTP-139/A 81 140,000 136 97 5
BTP-199/A 81 199,000 193 138 5
BTP-270/A 81 270,000 262 187 5
BTP-370/A 81 370,000 359 256 5
Models with letter ³A´ following the model number have the optional ASME tank FonstruFtion
The BTP-370 is available in natural gas only
TABLE 3. GAS AND ELECTRICAL CHARACTERISTICS
Model Type of Gas
Gas Supply Pressure
Gas Manifold Pressure Volts/Hz AmperesMinimum Maximum
All Models Natural 45" WC (112 kPa) 14" WC (348 kPa) 35" WC (087 kPa) 120/60 <5
All Models * Propane 45" WC (112 kPa) 14" WC (348kPa) 35" WC (087 kPa) 120/60 <5
* Model BTP-370(A) is not available in Propane
INSTALLATION CONSIDERATIONS
10
The heater must not be loFated in an area where it will be
subjeFt to freezing
LoFate it near a Àoor drain The heater should be loFated
in an area where leakage from heater or FonneFtions will
not result in damage to adjaFent area or to lower Àoors of
the struFture
When suFh loFations Fannot be avoided, a suitable metal
drain pan should be installed under heater SuFh pans
should be fabriFated with sides at least 2´ deep, with length
and width at least 2´ greater than diameter of heater and
must be piped to an adequate drain Pan must not restriFt
Fombustion air Àow
CLEARANCES
These heaters are approved for installation on non-Fombustible
flooring in an alFove when the minimum FlearanFe from
Fombustion or non-Fombustible FonstruFtion are followed as
indiFated in Figure 7 and Table 5
Units whiFh are to be installed on Fombustible Àooring must
be supported by a full layer of hollow FonFrete bloFks, from
8" to 12"
thiFk and extending 12" (minimum) beyond the heater in all
direFtions The FonFrete bloFks must provide an unbroken
FonFrete surfaFe under the heater with the hollows running
Fontinuously and horizontally A 3/16 inFh steel plate must
Fover the FonFrete bloFks See Figure 5
PROPER INSTALLATION ON COMBUSTIBLE FLOORING
FIGURE 6.
In all installations the minimum Fombustible FlearanFes from
barometriF draft Fontrol surfaFe or vent piping shall be 6´
(152mm) Vent piping passing through a Fombustible wall or
Feiling must be a Fontinuous run (no joints) and retain 6´
(152mm) FlearanFe unless an approved reduFing thimble is used
A serviFe FlearanFe of 24´ (610mm) should be maintained from
serviFeable parts, suFh as relief valves, bafÀes, thermostats,
Fleanout openings or drain valves
TABLE 5. INSTALLATION CLEARANCES
A
(RIGHT SIDE)
B
(LEFTSIDE)
C
(BACK)
D
(CEILING)
BTP-139(A) 6" (1524 Fm) 6" (1524 Fm) 6" (1524 Fm) 21" (5334 Fm)
BTP-199(A) 6" (1524 Fm) 6" (1524 Fm) 6" (1524 Fm) 21" (5334 Fm)
BTP-270(A) 6" (1524 Fm) 6" (1524 Fm) 6" (1524 Fm) 21" (5334 Fm)
BTP-370(A) 6" (1524 Fm) 6" (1524 Fm) 6" (1524 Fm) 24" (6096 Fm)
LOCATING THE WATER HEATER
Property Damage Hazard
All water heaters eventually leak.
Do not install without adequate drainage.
CAUTION
When installing the heater, Fonsideration must be given to
proper loFation LoFation seleFted should be as Flose to the
staFk or Fhimney as praFtiFable, with adequate air supply and
as Fentralized with the piping system as possible
Fire or Explosion Hazard
Read instruction manual before
installing, using or servicing
water heater.
Avoid all ignition sources if you smell gas.
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
Use only the gas shown on the water heater rating label.
Keep ignition sources away from faucets after extended
periods of non-use.
Maintain required clearances to combustibles.
Do not expose water heater controls to excessive gas
pressure.
There is a risk in using fuel burning applianFes suFh as gas water
heaters in rooms, garages or other areas where gasoline, other
Àammable liquids or engine driven equipment or vehiFles are stored,
operated or repaired Flammable vapors are heavy and travel
along the Àoor and may be ignited by the heater¶s igniter or main
burner Àames Fausing ¿re or explosion Some loFal Fodes permit
operation of gas applianFes in suFh areas if they are installed 18´
or more above the Àoor This may reduFe the risk if loFation in
suFh an area Fannot be avoided
Do not install this water heater direFtly on a Farpeted Àoor A ¿re
hazard may result Instead the water heater must be plaFed on a
metal or wood panel extending beyond the full width and depth by at
least 3 inFhes in any direFtion If the heater is installed in a Farpeted
alFove, the entire Àoor shall be Fovered by the panel Also, see the
DRAINING requirements in MAINTENANCE SeFtion
The heater shall be loFated or proteFted so it is not subjeFt to physiFal
damage by a moving vehiF
le
Flammable items, pressurized Fontainers or any other potential
¿re hazardous artiFles must never be plaFed on or adjaFent to
the heater Open Fontainers or Àammable material should not be
stored or used in the same room with the heater
INSTALLATION CONSIDERATIONS
11
is to reduFe the standby heat loss enFountered with storage
tank heaters The water heaters Fovered by this manual meet
or exFeed the Energy PoliFy AFt standards with respeFt to
insulation and standby heat loss requirements, making an
insulation blanket unneFessary
Should you Fhoose to apply an insulation blanket to this
heater, you should follow these instruFtions See the
Features and Components seFtion of this manual for
identifiFation of Fomponents mentioned below Failure to
follow these instruFtions Fan restriFt the air flow required for
proper Fombustion, 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 Fontrol
DO NOT Fover the gas Fontrol valve, thermostat or the
Temperature-Pressure Relief Valve
DO NOT allow insulation to Fome within 2´ (5 Fm) of the
burners, to prevent bloFkage of Fombustion air Àow to the
burners
DO NOT Fover the instruFtion manual Keep it on the side of
the water heater or nearby for future referenFe
DO obtain new warning and instruFtion labels from the
manufaFturer for plaFement on the blanket direFtly over the
existing labels
DO inspeFt the insulation blanket frequently to make Fertain
it does not sag, thereby obstruFting Fombustion air Àow
HARD WATER
Where hard water Fonditions exist, water softening or the
threshold type of water treatment is reFommended This will
proteFt the dishwashers, Foffee urns, water heaters, water piping
and other equipment
See the MaintenanFe SeFtion in this manual for sediment and
lime sFale removal proFedures
CIRCULATION PUMPS
A FirFulating pump is used when a system requires a FirFulating
loop or there is a storage tank used in FonjunFtion with the water
heater See Water Piping Diagrams in this manual for installation
loFation of FirFulating pumps
See the CirFulation Pump Wiring Diagrams in this manual for
eleFtriFal hookup information Install in aFFordanFe with the
Furrent edition of the National EleFtriFal Code, NFPA 70 or the
Canadian EleFtriFal Code, CSA C221
All-bronze FirFulating pumps are reFommended for used with
FommerFial water heaters
Some FirFulating pumps are manufaFtured with sealed bearings
and do not require further lubriFation Some FirFulating pumps
must be periodiFally oiled Refer to the pump manufaFturer¶s
instruFtions for lubriFation requirements
FIGURE 7.
INSULATION BLANKET
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.
Breathing Hazard - Carbon Monoxide Gas
Insulation blankets are available to the general publiF for
external use on gas water heaters but are not neFessary
with these produFts The purpose of an insulation blanket
12
Breathing Hazard - Carbon Monoxide Gas
Breathing carbon monoxide can cause brain damage or
death. Always read and understand instruction manual.
Under no circumstances should
the input exceed the rate shown
on the water heater’s rating label.
Overfiring could result in damage to
the water heater and sooting.
Gas and carbon monoxide detectors
are available.
Installations above 2000 feet (610 meters) require
replaFement of burner orifiFes in aFFordanFe with Furrent
edition of the National Fuel Gas Code (ANSI Z2231) For
Canadian installations Fonsult Canadian Installations Code
CAN/CSA B1491 Failure to replaFe orifiFes will result in
improper and ineffiFient operation of the water heater resulting
in the produFtion of inFreased levels of Farbon monoxide gas
in exFess of safe limits whiFh Fould result in serious personal
injury or death
You should FontaFt your gas supplier for any speFifiF Fhanges
whiFh may be required in your area
As the elevation above sea level is inFreased, there is less
oxygen per FubiF foot of air Therefore, the heater input rate
should be reduFed at high altitudes for satisfaFtory operation
with the reduFed oxygen supply Fa il u re to ma ke t h i s r e du Ftion
would result in an over firing of the heater Fausing sooting,
poor Fombustion and/or unsatisfaFtory heater performanFe
Ratings speFi¿
ed by manufaFturers for most applianFes apply
for elevations up to 2000 feet (610m) For elevations above
2000 feet (610), ratings must be reduFed at the rate of 4
for eaFh 1000 feet (305m) above sea level For example, if a
heater is rated at 78,000 Btuh (229 Kwh) at sea level, to rate
the heater at 4000 feet (1219m), you subtraFt 4 (onFe for eaFh
thousand feet) x04 (4 input reduFtion) x 78,000 (original
rating) from the original rating
Therefore, to FalFulate the input rating at 4,000 feet (1219m)
4 x 04 x 78,000 12,480 Btuh (37 Kwh), 78,000 (229 Kwh) -
12,480 (37 Kwh) 65,520 Btuh (192 Kwh) At 6000 feet (1829m)
the ForreFt input rating should be 59,280 Btuh (174 Kwh)
CIRCULATING PUMP WIRING DIAGRAM
STORAGE TANK OR BUILDING RECIRCULATION
FIELD SUPPLIED TEMPERATURE CONTROL
INSTALLED IN THE STORAGE TANK
OR CIRCULATING LOOP RETURN LINE
CIRC
PUMP
MOTOR
L1 HOT
L2 NEUTRAL
120 VAC
POWER
NOTE: USE SEPARATE 120 VAC POWER
SUPPLY FOR PUMP CIRCUIT. DO NOT
SHARE POWER WITH WATER HEATER AS THIS
MAY CAUSE ELECTRICAL LINE NOISE AND
LEAD TO ERRATIC CONTROL SYSTEM
OPERATION.
FIGURE 8.
CIRCULATING PUMP WIRING DIAGRAM
DISHWASHER LOOP WITH TOGGLE SWITCH
FIELD SUPPLIED TEMPERATURE
CONTROL INSTALLED IN THE
CIRCULATING LOOP RETURN LINE
DISHWASHER
TOGGLE
SWITCH
CIRC
PUMP
MOTOR
L1 HOT
L2 NEUTRAL
120 VAC
POWER
NOTE: USE SEPARATE 120 VAC POWER
SUPPLY FOR PUMP CIRCUIT. DO NOT SHARE
POWER WITH WATER HEATER AS THIS MAY
CAUSE ELECTRICAL LINE NOISE AND LEAD
TO ERRATIC CONTROL SYSTEM OPERATION.
FIGURE 9.
HIGH ALTITUDE INSTALLATIONS
Fire and Explosion Hazard
Gas and carbon monoxide detectors are
available.
Overfiring could result in fire or
explosion.
Under no circumstances should the
input exceed the rate shown on the
water heater’s rating label.
13
4 When installing multiple water heaters in the same gas supply
system it is reFommended that individual positive loFk-up gas
pressure regulators be installed at eaFh unit
POWER SUPPLY
The water heaters Fovered in this manual require a 120 VAC,
1Ø (single phase), 60Hz, 15 amp power supply and must also
be eleFtriFally grounded in aFFordanFe with loFal Fodes or, in the
absenFe of loFal Fodes, with the National EleFtriFal Code, ANSI/
NFPA 70 or the Canadian EleFtriFal Code, CSA C221
WATER TEMPERATURE CONTROL AND MIXING VALVES
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.
Water heated to a temperature whiFh will satisfy Flothes washing, dish
washing, and other sanitizing needs Fan sFald and Fause permanent
injury upon FontaFt Short repeated heating FyFles Faused by small
hot water uses Fan Fause temperatures at the point of use to exFeed
the water heater¶s temperature setting by up to 20F (11C)
Some people are more likely to be permanently injured by hot water
than others These inFlude the elderly, Fhildren, the in¿rm and the
physiFally/mentally disabled Table 6 shows approximate time-to-burn
relationship for normal adult skin If anyone using hot water provided
by the water heater being installed ¿ts into one of these groups or if
there is a loFal Fode or state law requiring a Fertain water temperature
at the point of use, then speFial preFautions must be taken
In addition to using the lowest possible temperature setting that
satis¿es the demand of the appliFation a Mixing Valve should be
installed at the water heater (see Figure 10) or at the hot water taps
to further reduFe system water temperature
Mixing valves are available at plumbing supply stores Consult a
Quali¿ed Installer or ServiFe AgenFy Follow mixing valve manufaFturer¶s
instruFtions for installation of the valves
TABLE 6.
Water Temperature F
Time for 1st Degree Burn
(Less Severe Burns)
Time for Permanent Burns
2nd & 3rd Degree
(Most Severe Burns)
110
(normal shower temp)
116 (pain threshold)
116 35 minutes 45 minutes
122 1 minute 5 minutes
131 5 seFonds 25 seFonds
140 2 seFonds 5 seFonds
149 1 seFond 2 seFonds
154 instantaneous 1 seFond
(US Government Memorandum, CPSC, Peter L Armstrong, Sept 15,1978)
GAS SUPPLY SYSTEMS
Low pressure building gas supply systems are defined as those
systems that Fannot under any FirFumstanFes exFeed 14´
WC (1/2 PSI Gauge) These systems do not require pressure
regulation Measurements should be taken to insure that gas
pressures are stable and fall within the requirements stated on
the water heater rating plate Readings should be taken with
all gas burning equipment off (statiF pressure) and with all gas
burning equipment running at maximum rate (dynamiF pressure)
The gas supply pressure must be stable within 15´ WC
from statiF to dynamiF pressure to provide good performanFe
Pressure drops that exFeed 15´ WC may Fause rough starting,
noisy Fombustion or nuisanFe outages InFreases or spikes
in statiF pressure during off FyFles may Fause failure to ignite
or in severe Fases damage to applianFe gas valves If your
low pressure system does NOT meet these requirements, the
installer is responsible for the ForreFtions
High Pressure building supply systems use pressures that
ex
Feed 14´ WC (1/2 PSI Gauge) These systems must use ¿eld
supplied regulators to lower the gas pressure to less than 14´
WC (1/2 PSI Gauge) Water heaters require gas regulators that
are properly sized for the water heater input and deliver the rating
plate speFi¿ed pressures Gas supply systems where pressure
exFeeds 5 PSI often require multiple regulators to aFhieve desired
pressures Systems in exFess of 5 PSI building pressure should
be designed by gas delivery professionals for best performanFe
Water heaters FonneFted to gas supply systems that exFeed 14´
WC (1/2 PSI Gauge) at any time must be equipped with a gas
supply regulator
All models require a minimum gas supply pressure of 45" WC
for natural gas and propane gas The minimum supply pressure
is measured while gas is Àowing (dynamiF pressure) The supply
pressure should never fall below 45" WC for natural gas and
propane gas The supply pressure should be measured with all
gas ¿red applianFes FonneFted to the Fommon main
¿ring at full
FapaFity If the supply pressure drops more than 15´ WC as gas
begins to Àow to the water heater then the supply gas system
inFluding the gas line and/or the gas regulator may be restriFted
or undersized See Supply Gas Regulator seFtion and Gas
Piping seFtion of this manual The gas valve on all models has
a maximum gas supply pressure limit of 14´ WC The maximum
supply pressure is measured while gas is not Àowing (statiF
pressure)
SUPPLY GAS REGULATOR
The maximum allowable gas supply pressure for this water heater is
14" WC (348 kPa) Install a positive loFk-up gas pressure regulator
in the gas supply line if inlet gas pressure Fan exFeed 14" WC
(348 kPa) at any time Regulators must be sized/used aFFording to
manufaFturer¶s speFi¿Fations
If a positive loFk-up regulator is required follow these instruFtions
1 Positive loFk-up gas pressure regulators must be rated at or above
the input Btu/hr rating of the water heater they supply
2 Positive loFk-up gas pressure regulator(s) should be installed no Floser
than 3 equivalent feet (1 meter) and no farther than 8 equivalent
feet (24 meters) from water heater¶s inlet gas FonneFtion
3 After installing the positive loFk-up gas pressure regulator(s), an
initial nominal supply pressure setting of 7" WC (174 kPa) while
water heater is operating is reFommended and will generally
provide good water heater operation Some additional adjustment
maybe required later to maintain a steady gas supply pressure
INSTALLATION REQUIREMENTS
14
HOT WATER
OUTLET
TO TANK
INLET
CHECK
VALVE
MIXING
VALVE
COLD
WATER
INLET
TEMPERED WATER
OUTLET
12” TO 15”
(30-38 cm)
CHECK
VALVE
FIGURE 10.
DISHWASHING MACHINES
All dishwashing maFhines meeting the National Sanitation
Foundation requirements are designed to operate with water
flow pressures between 15 and 25 pounds per square inFh
(103 kPa and 173 kPa) Flow pressures above 25 pounds
per square inFh (173 kPa), or below 15 pounds per square
inFh (103 kPa), will result in improperly sanitized dishes
Where pressures are high, a water pressure reduFing or flow
regulating Fontrol valve should be used in the 180F (82C)
line to the dishwashing maFhine and should be adjusted to
deliver water pressure between these limits
The National Sanitation Foundation also reFommends
FirFulation of 180F (82C) water The FirFulation flow rate
should be just enough to provide 180F (82C) water at the
point of take-off to the dishwashing maFhine
Adjust flow by throttling a full port ball valve installed in
the FirFulating line on the outlet side of the pump Never
throttle flow on the suFtion side of a pump See Water Piping
Diagrams in this manual
CLOSED WATER SYSTEMS
Water supply systems may, beFause of Fode requirements or
suFh Fonditions as high line pressure, among others, have
installed deviFes suFh as pressure reduFing valves, FheFk
valves, and baFk flow preventers DeviFes suFh as these
Fause the water system to be a Flosed system
THERMAL EXPANSION
As water is heated, it expands (thermal expansion) In a
Flosed system the vo lume of water will grow when it is heated
As the volume of water grows there will be a Forresponding
inFrease in water pressure due to thermal expansion Thermal
expansion Fan Fause premature tank failure (leakage) This
type of failure is not Fovered under the limited warranty
Thermal expansion Fan also Fause intermittent Temperature-
Pressure Relief Valve operation water disFharged from the
valve due to exFessive pressure build up This Fondition is
not Fovered under the limited warranty The Temperature-
Pressure Relief Valve is not intended for the Fonstant relief
of thermal expansion
A properly sized thermal expansion tank must be installed on
all Flosed systems to Fontrol the harmful effeFts of thermal
expansion ContaFt a loFal plumbing serviFe teFhniFian to have a
thermal expansion tank installed
See Water Line ConneFtions on page 19 and the Water Piping
Diagrams beginning on page 35
TEMPERATURE-PRESSURE RELIEF VALVE
Explosion Hazard
Temperature-Pressure Relief Valve
must comply with ANSI Z21.22-
CSA 4.4 and ASME code.
Properly sized temperature-
pressure relief valve must be
installed in opening provided.
Can result in overheating and
excessive tank pressure.
Can cause serious injury or death.
This water heater is provided with a properly rated/sized and Ferti¿ed
Fombination Temperature-Pressure Relief Valve (T&P valve) by
the manufaFturer The valve is Ferti¿ed by a nationally reFognized
testing laboratory that maintains periodiF inspeFtion of produFtion
of listed equipment of materials as meeting the requirements for
Pressure Relief Valves for Hot Water Supply Systems, ANSI Z2122
CSA 44, and the Fode requirements of ASME
If replaFed, the new T&P valve must meet the requirements
of loFal Fodes, but not less than a Fombination Temperature-
Pressure Relief Valve rated/sized and Ferti¿ed as indiFated in
the above paragraph The new valve must be marked with a
maximum set pressure not to exFeed the marked hydrostatiF
working pressure of the water heater (150 psi 1,035 kPa) and
a disFharge FapaFity not less than the water heater Btu/hr or kW
input rate as shown on the water heater¶s model rating label
NOTE In addition to the faFtory installed Temperature-Pressure
Relief Valve on the water heater, eaFh remote storage tank that
may be installed and piped to a water heating applianFe must also
have its own properly sized, rated and approved Temperature-
Pressure Relief Valve installed Call the toll free teFhniFal
support phone number listed on the baFk Fover of this manual
for teFhniF
al assistanFe in sizing a Temperature-Pressure Relief
Valve for remote storage tanks
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 direFtly into the ¿tting of the water heater designed for
the pressure relief valve Install disFharge piping so that any
disFharge will exit the pipe within 6 inFhes (152 Fm) above an
adequate Àoor drain, or external to the building In Fold Flimates
it is reFommended that it be terminated at an adequate drain
inside the building Be Fertain that no FontaFt is made with any
live eleFtriFal part The disFharge opening must not be bloFked
or reduFed in size under any FirFumstanFes ExFessive length,
over 30 feet (914 m), or use of more than four elbows Fan Fause
restriFtion and reduFe the disFharge FapaFity of the valve
15
No valve or other obstruFtion is to be plaFed between the
Temperature-Pressure Relief Valve and the tank Do not FonneFt
disFharge piping direFtly to the drain unless a 6´ (152 Fm)
air gap is provided To prevent bodily injury, hazard to life, or
property damage, the relief valve must be allowed to disFharge
water in adequate quantities should FirFumstanFes demand If
the disFharge pipe is not FonneFted to a drain or other suitable
means, the water Àow may Fause property damage
Water Damage Hazard
Temperature-Pressure Relief Valve discharge
pipe must terminate at adequate drain.
CAUTION
T&P Valve Discharge Pipe Requirements:
Shall not be smaller in size than the outlet pipe size of the
valve, or have any reduFing Fouplings or other restriFtions
Shall not be plugged or bloFked
Shall not be exposed to freezing temperatures
Shall be of material listed for hot water distribution
Shall be installed so as to allow Fomplete drainage of both
the Temperature-Pressure Relief Valve and the disFharge
pipe
Must terminate a maximum of six inFhes above a Àoor
drain or external to the building In Fold Flimates, it is
reFommended that the disFharge pipe be terminated at an
adequate drain inside the building
Shall not have any valve or other obstruFtion between the
pressure relief valve and the drain
Burn hazard.
Hot water discharge.
Keep clear of Temperature-
Pressure Relief Valve
discharge outlet.
The Temperature-Pressure Relief Valve must be manually operated
at least twiFe a year Caution should be taken to ensure that (1) no
one is in front of or around the outlet of the Temperature-Pressure
Relief Valve disFharge line, and (2) the water manually disFharged
will not Fause any bodily injury or property damage beFause
the water may be extremely hot If after manually operating the
valve, it fails to Fompletely reset and Fontinues to release water,
immediately Flose the Fold water inlet to the water heater, follow the
draining instruFtions in this manual, and replaFe the Temperature-
Pressure Relief Valve with a properly rated/sized new one
NOTE: The purpose of a Temperature-Pressure Relief Valve is to
prevent exFessive temperatures and pressures in the storage tank
The T&P valve is not intended for the Fonstant relief of thermal
expansion A properly sized thermal expansion tank must be
installed on all Flosed systems to Fontrol thermal expansion, see
Closed Water Systems and Thermal Expansion on page 14
If you do not understand these instruFtions or have any questions
regarding the Temperature-Pressure Relief Valve Fall the toll
free number listed on the baFk Fover of this manual for teFhniFal
assistanFe
CONTAMINATED AIR
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.
Breathing carbon monoxide can cause brain damage or
death. Always read and understand instruction manual.
Corrosion of the Àue ways and vent system may oFFur if air for
Fombustion Fontains Fertain FhemiFal vapors SuFh Forrosion
may result in failure and risk of asphyxiation
Combustion air that is Fontaminated Fan greatly diminish the life
span of the water heater and water heater Fomponents suFh as
hot surfaFe igniters and burners Propellants of aerosol sprays,
beauty shop supplies, water softener FhemiFals and FhemiFals
used in dry Fleaning proFesses that are present in the Fombustion,
ventilation or ambient air Fan Fause suFh damage
Do not store produFts of this sort near the water heater Air whiFh
is brought in FontaFt with the water heater should not Fontain any
of these FhemiFals If neFessary, unFontaminated air should be
obtained from remote or outdoor sourFes The limited warranty
is voided when failure of water heater is due to a Forrosive
atmosphere (See limited warranty for Fomplete terms and
F
onditions)
AIR REQUIREMENTS
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.
Breathing carbon monoxide can cause brain damage or
death. Always read and understand instruction manual.
For safe operation an adequate supply of fresh unFontaminated
air for Fombustion and ventilation must be provided
An insuf¿Fient supply of air Fan Fause reFirFulation of Fombustion
produFts resulting in Fontamination that may be hazardous to
life SuFh a Fondition often will result in a yellow, luminous burner
Àame, Fausing sooting of the Fombustion Fhamber, burners and
Àue tubes and Freates a risk of asphyxiation
Do not install the water heater in a Fon¿ned spaFe unless an
adequate supply of air for Fombustion and ventilation is brought
in to that spaFe using the methods desFribed in the Con¿ned
SpaFe seFtion that follows
Never obstruFt the Àow of ventilation air If you have any doubts
or questions at all, Fall your gas supplier Failure to provide the
proper amount of Fombustion air Fan result in a ¿re or explosion
and Fause property damage, serious bodily injury or death
16
DIRECT VENT APPLIANCES
ApplianFes installed in a DireFt Vent Fon¿guration that derive all
air for Fombustion from the outdoor atmosphere through sealed
intake air piping are not faFtored in the total applianFe input Btu/
hr FalFulations used to determine the size of openings providing
fresh air into Fon¿ned spaFes
EXHAUST FANS
Where exhaust fans are installed, additional air shall be provided
to replaFe the exhausted air When an exhaust fan is installed
in the same spaFe with a water heater, suf¿Fient openings to
provide fresh air must be provided that aFFommodate the
requirements for all applianFes in the room and the exhaust fan
Undersized openings will Fause air to be drawn into the room
through the water heater¶s vent system Fausing poor Fombustion
Sooting, serious damage to the water heater and the risk of ¿re
or explosion may result It Fan also Freate a risk of asphyxiation
LOUVERS AND GRILLES
The free areas of the fresh air openings in the instruFtions that
follow do not take in to aFFount the presenFe of louvers, grilles or
sFreens in the openings
The required size of openings for Fombustion, ventilation and
dilution air shall be based on the ³net free area´ of eaFh opening
Where the free area through a design of louver or grille or sF
reen
is known, it shall be used in FalFulating the size of opening
required to provide the free area speFi¿ed 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 ¿xed in the open position
UNCONFINED SPACE
An UnFon¿ned SpaFe is one whose volume IS NOT LESS THAN
50 FubiF feet per 1,000 Btu/hr (48 FubiF meters per kW) of the
total input rating of all applianFes installed in the spaFe Rooms
FommuniFating direFtly with the spaFe, in whiFh the applianFes
are installed, through openings not furnished with doors, are
Fonsidered a part of the unFon¿ned spaFe
Makeup air requirements for the operation of exhaust fans,
kitFhen ventilation systems, Flothes dryers and ¿replaFes shall
also be Fonsidered in determining the adequaFy of a spaFe to
provide Fombustion, ventilation and dilution air
UNUSUALLY TIGHT CONSTRUCTION
In unFon¿ned spaFes in buildings, in¿ltration may be adequate
to provide air for Fombustion, ventilation and dilution of Àue
gases However, in buildings of unusually tight FonstruFtion (for
example, weather stripping, heavily insulated, Faulked, vapor
barrier, etF) additional air must be provided using the methods
desFribed in the Con¿ned SpaF
e seFtion that follows
CONFINED SPACE
A Con¿ned SpaFe is one whose volume is less than 50 FubiF
feet per 1,000 Btu/hr (48 FubiF meters per kW) of the total input
rating of all applianFes installed in the spaFe
Openings must be installed to provide fresh air for Fombustion,
ventilation and dilution in Fon¿ned spaFes The required size for
the openings is dependent on the method used to provide fresh
air to the Fon¿ned spaFe and the total Btu/hr input rating of all
applianFes installed in the spaFe
VENTING INSTALLATION
VENTING
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 ASPHY;IATION
Heater must be proteFted from freezing downdrafts
Remove all soot or other obstruFtions from the Fhimney that will
retard a free draft
Type B venting is reFommended with these heaters
This water heater must be vented in FomplianFe with all loFal
Fodes, the Furrent revision of the National Fuel Gas Code
(ANSI-Z2231) and with the Category I Venting Tables
If any part of the vent system is exposed to ambient temperatures
below 40F (44C) it must be insulated to prevent Fondensation
Do not FonneFt the heater to a Fommon vent or Fhimney with
solid fuel burning equipment This praFtiFe is prohibited by
many loFal building Fodes as is the praFtiFe of venting gas
¿red equipment to the duFt work of ventilation systems
Where a separate vent FonneFtion is not available and the vent
pipe from the heater must be FonneFted to a Fommon vent with
an oil burning furnaFe, the vent pipe should enter the smaller
Fommon vent or Fhimney at a point above the large vent pipe
BAROMETRIC DRAFT CONTROL ASSEMBLY
A double-aFting barometriF draft Fontrol assembly is provided
with eaFh unit The draft Fontrol assembly must be installed
without alteration This assembly is faFtory adjusted for horizontal
appliFation only and must be attaFhed to the heater as shown in
Figure 11 The outlet of the draft Fontrol assembly may be rotated
to faFe in direFtion needed The assembly must be ¿tted to the
jaFket Fover suFh that it is plumb and level to the ground Fasten
the draft Fontrol assembly to the top Fover using sheet metal
sFrews at three loFations, or more, as required
Dampers or other obstruFtions must not be installed between the
heater and the barometriF draft Fontrol assembly
Do not adjust settings on gate Counterweight washers are faFtory
adjusted and should result in breeFhing pressure measurements
at the Fombustion test hole (Figure 11) within the range shown
in Table 10
NOTE: A negative draft must be maintained in the vent piping
When installed, the damper gate must pivot freely in the ring
guides This gate will automatiFally adjust to regulate the Fhimney
draft imposed on the heater
PROPER DRAFT CONTROLLER AND
VENT PIPE INSTALLATION
FIGURE 11.
17
FRESH AIR OPENINGS FOR CONFINED SPACES
The following instruFtions shall be used to FalFulate the size,
number and plaFement of openings providing fresh air for
Fombustion, ventilation and dilution in Fon¿ned spaFes The
illustrations shown in this seFtion of the manual are a referenFe
for the openings that provide fresh air into Fon¿ned spaFes
only DO NOT refer to these illustrations for the purpose of vent
installation See Venting Installation on page 16 for Fomplete
venting installation instruFtions
OUTDOOR AIR THROUGH TWO OPENINGS
FIGURE 12.
The Fon¿ned spaFe shall be provided with two permanent
openings, one FommenFing within 12 inFhes (300 mm) of the top
and one FommenFing within 12 inFhes (300 mm) of the bottom of
the enFlosure The openings shall FommuniFate direFtly with the
outdoors See Figure 12
EaFh opening shall have a minimum free area of 1 square inFh
per 4,000 Btu/hr (550 mm
2
per kW) of the aggregate input rating
of all applianFes installed in the enFlosure EaFh opening shall
not be less than 100 square inFhes (645 Fm
2
)
OUTDOOR AIR THROUGH ONE OPENING
FIGURE 13.
Alternatively a single permanent opening, FommenFing
within 12 inFhes (300 mm) of the top of the enFlosure,
shall be provided See Figure 12 The water heater shall
have FlearanFes of at least 1 inFh (25 mm) from the sides
and baFk and 6 inFhes (l50 mm) from the front of the
water heater The opening shall direFtly FommuniFate
with the outdoors or shall FommuniFate through a vertiFal
or horizontal duFt to the outdoors or spaFes that freely
FommuniFate with the outdoors and shall have a minimum
free area of the following
1 1 square inFh per 3000 Btu/hr (733 mm
2
per kW) of
the total input rating of all applianFes loFated in the
enFlosure, and
2 Not less than the sum of the areas of all vent FonneFtors
in the spaFe
OUTDOOR AIR THROUGH TWO HORIZONTAL DUCTS
FIGURE 14.
The Fonfined spaFe shall be provided with two permanent
horizontal duFts, one FommenFing within 12 inFhes (300
mm) of the top and one FommenFing within 12 inFhes
(300 mm) of the bottom of the enFlosure The horizontal
duFts shall FommuniFate direFtly with the outdoors See
Figure 14
EaFh duFt opening shall have a minimum free area of
1 square inFh per 2,000 Btu/hr (1100 mm2 per kW) of
the aggregate input rating of all applianFes installed in
the enFlosure
When duFts are used, they shall be of the same Fross
seFtional area as the free area of the openings to whiFh
they FonneFt The minimum dimension of reFtangular air
duFts shall be not less than 3 inFhes
18
When duFts are used, they shall be of the same Fross seFtional
area as the free area of the openings to whiFh they FonneFt
The minimum dimension of reFtangular air duFts shall be not less
than 3" (762 mm)
AIR FROM OTHER INDOOR SPACES
FIGURE 16.
The Fon¿ned spaFe shall be provided with two permanent
openings, one FommenFing within 12 inFhes (300 mm) of the top
and one FommenFing within 12 inFhes (300 mm) of the bottom of
the enFlosure See Figure 16
EaFh opening shall FommuniFate direFtly with an additional
room(s) of suf¿Fient volume so that the Fombined volume of all
spaFes meets the Friteria for an UnFon¿ned SpaFe
EaFh opening shall have a minimum free area of 1 square inFh
per 1,000 Btu/hr (2200 mm
2
per kW) of the aggregate input rating
of all applianFes installed in the enFlosure EaFh opening shall
not be less than 100 square inFhes (645 Fm
2
)
OUTDOOR AIR THROUGH TWO VERTICAL DUCTS
The illustrations shown in this seFtion of the manual are a
referenFe for the openings that provide fresh air into Fon¿ned
spaFes only
DO NOT refer to these illustrations for the purpose of vent
installation See Venting Installation on page 14 for Fomplete
venting installation instruFtions
FIGURE 15.
The Fon¿ned spaFe shall be provided with two permanent vertiFal
duFts, one FommenFing within 12 inFhes (300 mm) of the top and
one FommenFing within 12 inFhes (300 mm) of the bottom of the
enFlosure The vertiFal duFts shall FommuniFate direFtly with the
outdoors See Figure 15
EaFh duFt opening shall have a minimum free area of 1 square
inFh per 4,000 Btu/hr (550 mm
2
per kW) of the aggregate input
rating of all applianFes installed in the enFlosure
19
Where an existing Fhimney or vent is to be used, be sure
that the Fhimney or vent has adequate FapaFity for the
number and sizes of gas applianFes being vented through
it InspeFt the Fhimney or vent and remove all soot or other
obstruFtions whiFh will retard free draft
Vent FonneFt o r s m ak i n g ho r iz o n t al r un s m us t h av e a mi ni mu m
upward slope toward the Fhimney or vent of 1/4 inFh per foot
Vent FonneFtor length should be kept as short as possible
Be sure that the vent pipe does not extend beyond the inside
wall of a Fhimney
In venting systems where a Fontinuous or intermittent
baFk (positive) draft is found to exist, the Fause must
be determined and ForreFted In some Fases, a speFial
vent Fap may be required Do not install this unit on the
positive draft side of a venting system being served by a
power exhauster
WATER HEATER INSTALLATION
VENT CONNECTION
Vent FonneFtions must be made to an adequate staFk
or Fhimney Refer to the National Fuel Gas Code (Furrent
edition) or to the vent pipe manufaFturer¶s gas vent and
Fhimney sizing table to properly design and size the venting
system Refer to Table 7 for the vent pipe size required for
installation to the barometriF draft Fontrol assembly outlet
TABLE 7. BAROMETRIC DRAFT CONTROL
ASSEMBLY OUTLET SIZE
MODEL
DRAFT CONTROL
OUTLET DIAMETER
BTP-139/A
BTP-199/A
BTP-270/A
BTP-370/A
6´
6´
8´
8´
WATER PIPING DIAGRAMS
This manual provides detailed water piping diagrams for typiFal
methods of appliFation for the water heaters, see Water Piping
Diagrams beginning on page 35
The water heater may be installed by itself, or with a separate
storage tank When used with a separate storage tank, the
FirFulation may be either by gravity or by means of FirFulating
pump Adjust Àow by throttling a full port ball valve installed in the
FirFulating line on the outlet side of the pump Never throttle Àow
on the suFtion side of a pump See the Water Piping Diagrams
beginning on page 35
NOTE: In addition to the faFtory installed Temperature-Pressure
Relief Valve (T&P valve) on the water heater, eaFh remote
storage tank that may be installed and piped to a water heating
applianFe must also have its own properly sized, rated and
approved Temperature-Pressure Relief Valve installed
Call the toll free teFhniFal support phone number listed on the
baFk Fover of this manual for further assistanFe in sizing a T&P
valve for remote storage tanks
T&P VALVE DISCHARGE PIPE
Explosion Hazard
Temperature-Pressure Relief Valve
must comply with ANSI Z21.22-
CSA 4.4 and ASME code.
Properly sized temperature-
pressure relief valve must be
installed in opening provided.
Can result in overheating and
excessive tank pressure.
Can cause serious injury or death.
WATER LINE CONNECTIONS
The water piping installation must Fonform to these instruFtions
and to all loFal Fode authority having jurisdiFtion Good praFtiFe
requires that all heavy piping be supported
Read and observe all requirements in the following seFtions
before installation of the water piping begins
1 Water Temperature Control and Mixing Valves on page 13
2 Dishwashing MaFhines on page 14
3 Temperature-Pressure Relief Valve on page 14-15
4 Closed Systems and Thermal Expansion on page 14
5 For multiple water heater installations see Water Piping
Diagrams beginning on page 35
WATER (POTABLE) HEATING AND SPACE HEATING
1 All piping Fomponents FonneFted to this unit for spaFe
heating appliFations shall be suitable for use with potable
water
2 ToxiF FhemiFals, suFh as those used for boiler treatment,
shall NEVER be introduFed into this system
3 This unit may NEVER be FonneFted to any existing heating
system or Fomponent(s) previously used with a non-potable
water heating applianFe
4 When the system requires water for spaFe heating at
temperatures higher than required for domestiF
water
purposes, a tempering valve must be installed Please
refer to installation diagrams beginning on page 35 of this
manual for suggested piping arrangements
5 These water heaters Fannot be used in spaFe heating
appliFations only
THERMOMETERS (NOT SUPPLIED)
Thermometers should be obtained and ¿eld installed as shown
in the installation diagrams
Thermometers are installed in the system as a means of
deteFting the temperature of the outlet water supply
20
This water heater is provided with a properly rated/sized and
Ferti¿ed Fombination temperature - pressure (T&P) relief valve
by the manufaFturer See Temperature-Pressure Relief Valve
on pages 14-15 for information on replaFement and other
requirements
Water Damage Hazard
Temperature-Pressure Relief Valve discharge
pipe must terminate at adequate drain.
CAUTION
Install a disFharge pipe between the T&P valve disFharge
opening and a suitable Àoor drain Do not FonneFt disFharge
piping direFtly to the drain unless a 6´ (152 Fm) air gap is
provided To prevent bodily injury, hazard to life, or property
damage, the relief valve must be allowed to disFharge water
in adequate quantities should FirFumstanFes demand If the
disFharge pipe is not FonneFted to a drain or other suitable
means, the water Àow may Fause property damage
T&P VALVE DISCHARGE PIPE REQUIREMENTS:
Shall not be smaller in size than the outlet pipe size of the
valve, or have any reduFing Fouplings or other restriFtions
Shall not be plugged or bloFked
Shall not be exposed to freezing temperatures
Shall be of material listed for hot water distribution
Shall be installed so as to allow Fomplete drainage of both
Temperature-Pressure Relief Valve and the disFharge pipe
Must terminate a maximum of six inFhes above a Àoor
drain or external to the building In Fold Flimates, it is
reFommended that the disFharge pipe be terminated at an
adequate drain inside the building
Shall not have any valve or other obstruFtion between the
relief valve and the drain
INSTALLATION DIAGRAMS - TOP INLET/OUTLET USAGE
Use of the top inlet water FonneFtion requires an inlet dip tube
(refer to Figure 17) The tube is supplied in the heater Follow
Faution labels if applying heat to this ¿tting Do not allow pipe
dope to FontaFt the plastiF tube during installation
TUBE INLET INSTALLATION
FIGURE 17.
BURNER INSTALLATION
Remove the faFtory-installed insulation Fovering the Fombustion
Fhamber opening (A utility knife is useful for Futting out the
insulation) Cut the insulation baFk even with the jaFket opening
Install the Àange gasket (whiFh is usually taped to the heater jaFket)
over the three bolts protruding from the tank at the Fombustion
Fhamber opening
Remove hardware (3 hex nuts, 3 Àat washers, and 3 loFk washers)
from the shipping bag attaFhed to the heater¶s eleFtriFal Fonduit
Begin assembling the power burner to the tank by plaFing the power
burner nozzle in the Fombustion Fhamber opening Slide the nozzle
into the tank and rotate the mounting Àange to engage the mounting
bolts, refer to Figure 18 Then, plaFe the Àat washers followed by
the loFk washers, and ¿nally the hex nuts on the mounting bolts
Hand tighten the nuts Then gradually tighten eaFh nut alternating
between the 3 mounting bolts Do not over tighten as damage to
the Àange gasket or to the tank may result Refer to Figure 18
POWER BURNER INSTALLATION
FIGURE 18.
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
-
1
-
2
-
3
-
4
-
5
-
6
-
7
-
8
-
9
-
10
-
11
-
12
-
13
-
14
-
15
-
16
-
17
-
18
-
19
-
20
-
21
-
22
-
23
-
24
-
25
-
26
-
27
-
28
-
29
-
30
-
31
-
32
-
33
-
34
-
35
-
36
-
37
-
38
-
39
-
40
-
41
-
42
-
43
-
44
-
45
-
46
-
47
-
48
-
49
-
50
-
51
-
52
-
53
-
54
-
55
-
56
A.O. Smith 104 Series User manual
- Category
- Water heaters & boilers
- Type
- User manual
Ask a question and I''ll find the answer in the document
Finding information in a document is now easier with AI
Related papers
-
A.O. Smith 100121410 User manual
-
A.O. Smith dre-80 User manual
-
-
-
-
-
-
-
-
Other documents
-
AO Smith Multi Flue Operating instructions
-
EasyFlex EF-TET-2 User manual
-
Lochinvar CLN075075 User manual
-
Enviro 6G50 76N Series Residential Gas Water Heaters User manual
-
GSW Envirosense Power Vent Installation guide
-
-
-
-
State Industries 100234911 User manual
-
State SUF 60120-100250 User manual
