Propane (LP.)
Propane (LP.)
High Altitude
Propane (LP)
Propane (LP)
High Altitude
Propane (LP.)
POWER MISEREÓ
GAS WATER HEATER
• Safety Instructions
• Installation
• Operation
For Your Safety
AN ODORANT IS ADDED TO THE GAS USED BY THIS
WATER HEATER
WARNING: If the information in these instructions are not fol
lowed exactly, a fire or explosion may result, causing property
damage, personal injury or death.
•Oo 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 ^as supplier from a neighbor’s phone.
Follow the ^ supplier’s instructions.
• If you can not reach your gas supplier, call the fire department.
-Installation and service must be performed by a qualified installer,
service agency or the gas supplier.
• Care and Maintenance
• Troubleshooting
• Parts List
____________
_ _
_______________
_
Caution;
Read and Follow
All Safety Rules and
Operating Instructions
Before First Use of
This Product.
I Save this Manual for Future Reference.
Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.
AWARNING
Improper installation, adjustment, alteration, service or maintenance can
cause DEATH, SERIOUS BODILY INJURY, OR PROPERTY DAMAGE. Refer to
this manual for assistance or consult the local Sears Service Center or gas util
ity for further information._______________________________________________________
AWARNING
Flammable vapors may be drawn by air currents from other areas of the
structure to this appliance.______________________________________________________
AWARNING
READ THE GENERAL SAFETY SECTION BEGINNING ON INSIDE COVER
AND THEN THIS ENTIRE MANUAL BEFORE INSTALLING OR OPERAT
ING THIS WATER HEATER.
Safety Precautions
AWARNING
Improper installation, adjustment, alteration, service or
maintenance can cause DEATH, SERIOUS BODILY
INJURY, OR PROPERTY DAMAGE. Refer to this manu
al for assistance or consult your local Sears Service
Center for further information.
AWARNING
WATER HEATERS EQUIPPED FOR ONE TYPE GAS
ONLY; This water heater is equipped for one type gas
only. Check the model rating plate near the gas control
valve for the correct gas. DO NOT USE THIS WATER
HEATER WITH ANY GAS OTHER THAN THE ONE
SHOWN ON THE MODEL RATING PLATE. Failure to
use the correct gas can cause problems which can result in
DEATH. SERIOUS BODILY INJURY, OR PROPERTY
DAMAGE. If you have any questions or doubts consult
your gas supplier or local utility.
AWARNING
INSTALLATIONS IN AREAS WHERE FLAMMABLE LIQ
UIDS (VAPORS) ARE LIKELY TO BE PRESENT OR
STORED (GARAGES, STORAGE, AND UTILITY AREAS,
ETC): Flammable liquids (such as gasoline, solvents,
propane (LP) or butane, etc.), all of which emit flammable
vapors, may be improperly stored or used in such areas.
The gas water heater pilot light or main burner can ignite
such vapors. The resulting flashback and fire can cause
death or serious bums to anyone in the area, as well as
property damage.
if installation in such areas is your only option, then the
installation must be accomplished in a way that the pilot
flame and main burner flame are elevated fivm ^e floor
at least 18 inches. While this may reduce the chances of
flammable vapors from a floor spill being ignited, gasoline
and other flammable substances should never be stored or
used in the same room or area containing a gas water
heater or other open flame or spark producing appliance.
NOTE: Flammable vapors may be drawn by air currents
from other areas of the structure to the appliance.
AWARNING
If this water heater will be used in beauty shops, barber
shops, cleaning establishments, or self-service laundries
with dry cleaning equipment, it is imperative that the
water heater or water heaters be instidled so that com
bustion and ventilation air be taken from outside these
areas. Refer to the "Locating The New Water Heater”
section of this manual and also the latest edition of the
National Fuel Gas Code, ANSI Z223.1, also referred to as
NFPA 54 for specifics provided concerning air required.
AWARNING
A fire can start if combustible materials such as clothing,
cleaning materials, or flammable liquids are placed against
or next to the water heater.
__________________
AWARNING
At the time of manufecture tills water heater was pro
vided with a combination temperature-pressures relief
valve certified by a nationally recognized testing labora
tory that maintains periodic inspection of production of
listed equipment or materials, as meeting the require
ments for Relief Valves and Automatic Gas Shutoff
Devices for Hot Water Supply Systems, and the latest
edition of ANSI Z2I.22 and the code requirements of
ASME. If replaced, the valve must meet the require
ments of local codes, but not less than a combination
temperature and pressure relief valve certified as meet
ing the requirements for Relief Valves and Automatic
Gas Shutoff Devices for Hot Water Supply Systems,
ANSI Z21.22 by a nationally recognized testing laborato
ry that maintains periodic inspection of production of
listed equipment or materials.
The valve must be marked with a maximum set pressure
not to exceed the marked hydrostatic working pressure
of the water heater (ISO Ibs./sq. in.) and a discharge
capacity not less than the water heater input rate as
shown on the model rating plate. (Electric heaters watts divided ^ 1000 x 3415 equal BTU/Hr. rate.)
Your local jurisdictional authority, while mandating the
use of a temperature-pressure relief valve complying
with ANSI Z2I.22 and ASME, may require a valve model
different from the one furnished with the water heater.
Compliance with such local requirements must be satis
fied by the installer or end user of the water heater with
a locally prescribed temperature-pressure relief valve
installed in the designated opening in the water heater in
place of the factory furnished valve.
For safe operation of the water heater, the relief valve
must not be removed from it’s designated opening or
plugged.
The temperature-pressure relief valve must be installed
directly into the fitting of the water heater designated for
the relief valve. Position the valve downward and provide
tubing so that any discharge will exit only within 6 inches
above, or at any distance below the structural floor. 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, or use of more than four elbows can
cause restriction and reduce the discharge capacity of
the valve.
No valve or other obstruction is to be placed between
the relief valve and the tank. Do not connect tubing
directly to discharge drain unless a 6" air gap is provided.
To prevent bodily injury, hazard to life, or property dam-
the relief valve must be flowed to discharge water
in quantities should circumstances demand. If the dis
charge pipe is not connected to a drain or other suitable
means, the water flow may cause property damage.
The Discharge Pipe;
* Must not be smaller in size than the outlet pipe size of
the valve, or have any reducing couplings or other
restrictions.
* Must not be plugged or blocked.
* Must be of material listed for hot water distribution.
* Must be installed so as to allow complete drainage of
both the temperature-pressure relief valve, and the
discharge pipe.
* Must terminate at an adequate drain.
■ Must not have any valve between the relief valve and
tank.
Safety Precautions
AWARNING
A gas water heater cannot operate properly widiout the
correct amount of air for combustion. Do not install in a
confined area such a closet, unless you provide air as
shown in the “Locating The New Water Heater” section.
Never obstruct the flow of ventilation air. If you have any
doubts or questions at all, call your gas company. Failure
to provide die proper amount of combustion air can result
in a fire or explosion and can cause DEATH, SERIOUS
BODILY INJURY, OR PROPERTY DAMAGE.
AWARNING
HOTTER WATER CAN SCALD: Water heaters are
intended to produce hot water. Water heated to a tem
perature which will satisfy ciothes wnishing, dish washing,
and other sanitizing needs can scald and permanently
injure you upon contact. Some people are more likely to
be permanently injured by hot water than others. These
include the elderly, children, the infiryn, or physlcally/mentally handicapped. If anyone using hot water in your home
fits into one of these groups or V there is a local code or
state law requiring a certain temperature water at the hot
water t:q>, then you must take special precautions. In addi
tion to using the lowest possible temperature setting that
satisfies your hot water needs, a means such as a mixing
valve, should be used at the hot water taps used by these
people or at the water heater. Mixing valves are available
at plumbing supply or hardware stores. Follow manubicturers instructions for installation of the valves. Before
changing the factory setting on the thermostat, read the
‘Hemperature Regulation” section in this manual.
AWARNING
Soot build-up indicates a problem that requires correc
tion before Airdier use. Turn “off” gas to water heater
and leave "off” until repairs are made, because foilure to
correct the cause of the sooting can result in a fire or
explosion causing DEATH, SERIOUS BODILY INJURY,
OR PROPERTY DAMAGE.
AWARNING
This water heater must not be installed directly on car
peting. Carpeting must be protected by a metal or wood
panel beneath the appliance extending beyond the full
width and depth of the appliance by at least 3 inches
p6.2mm) in any direction, or if tiie appliance is instidled
in an alcove or closet, the entire floor must be covered by
the panel. Failure to heed this warning may result in a
fire hazard.
AWARNING
VENT DAMPERS - Any vent damper, whether it is operat
ed thermally or otherwise must be removed if its use
inhibits proper drafting of the water heater.
Thermally Operated Vent Dampers: Gas-fired water
heaters having thermal efficiency in excess of 80% may
produce a relatively low flue gas temperature. Such tem
peratures may not be high enough to properly open ther
mally operated vent dampers. This would cause spill^e of
flue gases and may cause carbon monoxide poisoning.
Vent dunpers must bear evidence of certification as com
plying with the latest edition of American National
Standard ANSI Z2I.68 (ANSI Z2I.66 & 67, respectively,
cover electrically and mechanically actuated vent
dampers). Before installation of any vent damper, consult
your local Sears Service Center or the gas utility for fur
ther information.
AWARNING
• The appliance and its individual shutoff valve must be dis
connected from the gas supply piping system during any
pressure testing of the gas system at test pressures in
excess oi 1/2 pound per square inch (3.5kPa).
•The appliance must be isolated from the gas supply pip
ing sy^m by closing its individual manuj shutoff valve
during any pressure testing of the gas supply piping sys
tem at test pressures equal or less than
square inch (3.5 kPa).____________________________
1/1 pound per
AWARNING
BEFORE LIGHTING [PROPANE (L.P.) GAS WATER
HEATERS]: Propane (LP.) gas is heavier than air. Should
there be a leak in the system, the gas will settle near the
ground. Basements, crawl spaces, skirted areas under
mobile homes (even when ventilated), closets and areas
below ground level will serve as pockets for the accumula
tion of this gas. Before attempting to light or relight the
water heater^ pilot or turning on a nea^y electri^ light
switch, be absolutely sure there is no accumulated gas in
the area. Search for odor of gas by sniffing at ground level
in the vicinity of the appliance. If odor is detected, follow
steps indicated at "For Your Safety” on the cover page of
this manual then leave the premises.
AWARNING
Chemical vapor corrosion of the flue and vent system
may occur if air for combustion contains certain chemical
vapors. Spray can propellants, cleaning solvents, refrigera
tor and air conditioner refrigerants, swimming pool
chemicals, calcium and sodium chloride, waxes, bleach,
and process chemicals are typical compounds which are
potentially corrosive.
AWARNING
Obstructed or deteriorated vent systems may present a
serious health risk or asphyxiation.
Safety Precautions continued on page 4
Safety Precautions
AWARNING
The water heater with draft hood Installed must be prop
erly vented to a chimney which terminates outdoors.
Never operate the water heater unless it is vented to the
outdoors and has adequate air supply to avoid risks of
improper operation, explosion or asphyxiation.
AWARNING
Minimum clearances between the water heater and com
bustible construction are I" at the sides and rev, 4" at the
front, wd 6" from the vent pipe. Clearance from the top of ^e
jacket is 18" on most models. Note that a lesser cfimension may
be allowed on some models. Refer to the label on the water
heater adjacent to the gas control valve for all clearances.
AWARNING
Do not use this appliance if any part of it has been under
water. Immediately call a Sears Service Technician to
inspect the appliance and to replace the gas control or any
part of the burner system which has been under water.
AWARNING
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
ex^mely flammable and explosive. To prevent the possi
bility of injury under these conditions, we recommend the
hot water faucet be opened for several minutes at the
kitchen sink before any electrical appliances which are
connected to the hot water system are used (such as a dis
hwasher 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 foucet at the time it is open.
ACAUTION
WATER HEATERS EVENTUALLY LEAK: Installation of
the water heater must be accomplished in such a manner
that if the tank or any connections should leak, the flow of
water vdll not cause damage to the structure. When such
locations cannot be avoided, a suitable drain pan should
be installed under the water heater. Drain pans are avail
able at your local Sears store. Such a drain pan must bis
not greater than 11/2 Inches deep, have a minimum
length and width of at least 2 inches greater than the
water heater dimensions and must be piped to an ade
quate drain. The pan must not restrict combustion air
flow. Under no circumstances is the manufacturer or
Sears to be held liable for any water damage in connec
tion with this water heater
AWARNING
INSULATING JACKETS: When installing an external
water heater insulation jacket on a gas water heater:
■ DO NOT cover the temperature-pressure relief valve.
* DO NOT put insulation over any part of the top of the
gas water heater.
* DO NOT put insulation over the gas control valve or gas
control v^ve/burner cover, or any access areas to the
burner.
* DO NOT let insulation around the gas water heater to
get within 8 inches of the floor (air must get to the
burner).
* DO NOT cover or remove operating instructions, and
safety related warning labels and materials affixed to the
water heater.
Failure to heed this wiil result in the possibility of a fire or
explosion.
Table of Contents..............................................................................................................................................................................................5
Materials and Basic Tools Needed....................................................................................................................................7
Removing the Old Water Heater......................................................................................................................................................................................... 8
Facts to Consider About the Location.................................................................................................................................................................................9
Combustion Air and Ventilation for Appliances in Unconfined Spaces......................................................................................................................10
Combustion Air and Ventilation for Appliances in Confined Spaces...........................................................................................................................10
Water Piping.........................................................................................................................................................................................................................11
Filling the Water Heater................................................................................................................................................................................................... 13
Gas Piping..................................................................................................................................................................................................................... 14-15
Temperature Regulation......................................................................................................................................................................................................19
Service and Adjustment............................................................................................................................................................20-21
Tank (Sediment) Cleaning..................................................................................................................................................................................................20
Venting System Inspection............................................................................................................................................................................................... 20
L.P, Gas Control Valve & Burner Assembly................................................................................................................................................................. 20
Stan Up Conditions........................................................................................................................................................................................................22-23
“Air” in Hot Water Faucets.............................................................................................................................................................................................23
High Temperature Shut Off System...............................................................................................................................................................................24
Not Enough Hot Water.....................................................................................................................................................................................................24
Water is too Hot.................................................................................................................................................................................................................24
Parts Order List....................................................................................28-31
Customer Responsibilities
Thank You for purchasing a Sears water heater.
Properly installed and maintained, it №ould give you years of
trouble free service. If you should decide that you want the new
water heater professionally installed by Sears call the local Sears
Service Center or any Sears store. Thw will arrange for prompt,
quality installation by Sears authorized contractors.
Abbreviations Found In This Instruction Manual
I.A.S. - International j^proval Services, A Division of CSA
A.N.S.I. - American National Standards Institute
________________
This gas-fired water heater is design certified by the
International Approval Services, A Division of CSA under
American National StandardfCSA Standard for Gas Water
Heaters ANS Z2I.I0.I • CSA 4.1 (latest edition). The
installation must conform with this manual, Local Codes
and vnth the latest edition of the National Fuel Gas Code,
ANSIZ223.I,
This publication is available from your local government or
public library, gas company, or by writing NFPA,
Batterymarch Park, Quincy, MA 02269.
• R^d the “Safety Precautions” section, pages 2 through 4 of
this manual first and then the entire manual carefully. If you
don’t follow the safety rules, the water heater will not operate
properly. It could cause DEATH. SERIOUS BODILY
INJURY AND/OR PROPERTY DAMAGE.
A WARNING
_________________
This manual contains instructions for the installation, opera
tion, and maintenance of the gas-fired water heater. It also
contains warniiigs through out the manual that you must read
and be aware of: All warnings and all instruaions arc cssendal
to the proper operation of the water heater and your safety.
Since we cannot put everything on the first few pages, READ
THE ENTIRE MANUAL BEFORE ATTEMPTING TO
INSTALL OR OPERATE THE WATER HEATER.
The installation must conform with the instructions in this
. manual; gas company rules; and Local Codes, or in the
absence of Local Codes, with the latest edition of the National
^
Fuel Gas code, ANSI Z223.1, also referred to as NFPA 54.
This publication is available from your local government or
public library or gas company or by writing NFPA,
Battetymarch Park, Quincy, MA 02269.
If after reading this manual you have any questions or do not
understand any portion of the instructions, call the Sears
Service Center,
CarefLilfo plan the place where you arc going to put the water
heater. Correct combustion, vent action, and vent pipe instal
lation are very important in preventing death from possible
carbon monoxide poisoning and fires.
Examine the location to ensure the water heater complies with
the “Facts to Consider About the Location” section in this
manual.
For California installation this water heater must be braced,
anchored, or strapped to avoid falling or moving during an
earthquake. See instructions for correct installation proce
dures. Instructions may be obtained from your local dealer,
wholesaler, public utilities or California Office of the State
To simplify the installation Sears has available the installation
parts shown below. You may or may not need all of these materialsi depending on your type of instulation.
VENT ELBOW
0
WATER HEATER STAND 14"xl4"xl8"
FOR USE WITH WATER HEATERS
INSTALLED IN RESIDENTIAL
GARAGES HAVING A DIAMETER 24"
OR LESS AND A RATED CAPACITY TS
GALLONS OR LESS
EXPANSION TANKS
FOR THERMAL
EXPANSION CONDI
TIONS AVAILABLE IN
2 GALLON AND 5
GALLON CAPACITY
THROUGH LOCAL
SEARS STORE OR
WATER HEATER INSTAL
LATION KIT WITH FLEXI
BLE CONNECTORS FOR
3/4" OR 1/1" THREADED
OR COPPER PLUMBING
SERVICE CENTERS
VENT PIPE
Basic Tools
You may or may not need all of these tools, depending on raur
type of installation. These toob can be purchased at your local
Sears store.
• Pipe Wrenches (2) 14"
• Screwdriver
• Tin Snips
• 6 Foot Tape of Folding Ruie
• Garden Hose
•Drili
• Pipe dope or Teflon Tape
FLEXIBLE WATER
HEATER GAS CON
NECTOR WITH
FITTINGS
DRAIN PANS
AVAILABLE IN 10" DIAMETER FOR
WATER HEATERS HAVING A DIAME
TER 18" OR LESS AND AVAILABLE IN
IS" DIAMETER FOR WATER HEATERS
HAVING A DIAMETER 18" OR LESS
GARDEN HOSE
SLOT-HEAD SCREWDRIVER
PHILLIPS SCREWDRIVER
PIPE DOPE (SQUEEZE TUBE)
USE FOR WATER AND
AS CONNECTIONS)a
4 FOOT TAPE
ROLL OF TEFLON TAPE
(USE ONLY ON WATER
CONNECTIONS)
WRENCH
TIN SNIPS
PIPE
3/4 WIRE BRUSH
t/1" WIRE BRUSH
ROLL OF LEAD FREE
SOFT SOLDER
ROLL OF EMERY
CLOTH
SOLDER FLUX
PROPANE
TORCH
TUBING
CUTTER
Installation Instructions
Removing the Old Water Heater
Turn “OFF" the gas supply to the water heater.
AWARNING
If the main gas line shutoff serving all gas appliances is
used, also shut “OFF” tiie gas at each appliance. Leave all
gas appliances shut “OFF” until the water heater installa^
tion is complete.
^^Turn “OFF” the water to the water
heater. Some installations require that
the water be turned off to the entire
house.
Disconnect the vent pipe from the draft hood where
they connect to the trater heater. In most installations
the vent pipe can be lifted off after any screw or other
attached devices are removed. Dispose of the draft
hood. The new water heater has the draft hood which
must be used for proper operation.
a. If you have copper piping to the water
'''—^ heater, the two copper water pipes can
be cut with a haclùaw approximately
four inches away ftom where thty con
nect to the water heater. This will avoid
cutting off the pipes too short.
Additional cuts can be made later if nec
essary. Disconnect the temperature-pres
sure relief valve drain line. When the
water heater is drained, disconnea the
hose from the drain valve. Close the
drain valve. The water heater is now
completely disconnected and ready to be
removed.
Check again to make sure the gs supply
(3)
is “OFF to the water heater. Then dis
connect the gas supply connection from
the gas control valve.
Attach a hose to the water heater drain
valve and put the other end in a floor
drain or outdoors. Open the water heater
drain valve. Open a nearby hot water
fliucet which will relieve pressure in the
water heater and speed draining.
AWARNING
The water passing out of the drain valve may be extremely
hot To avoid being scalded, make sure all connections are
tight and that the water flow is directed away from any
person.
b. If you have galvanized pipe to the water
heater, loosen the two galvanized pipes
with a pipe wrench at the union in e^
line. Also disconnect the pfoing remain
ing to the water heater. These pieces
_ r. These _
should be saved since they may be need
ed when reconnecting the new water
heater. Disconnect the tempwrature-pressure relief valve drain line. When the
water heater is drained, disconnect the
hose from the drain valve. Close the
drain valve. The water heater is now
completely disconnected and ready to be
removed.
: piping
A CAUTION
Mineral buildup or sediment may have accumulated in the
old water heater. This causes the water heater to be much
heavier than normal and this residue, if spilled out, could
cause staining.
Installation Instructions (cont’d)
Facts to Consider About the
Location
You should carefully choose an indoor location for the new
water heater, because the placement is a very important consid'
eration for the safety of me occupants in tnc building and for
the most economical use of the appliance. This water heater is
not for use in mobile homes or outdoor installation.
Whether replacing an old water heater or putting the water
heater in a new location, the following critical points must be
observed.
• The location selected should be indoors as close as practical to
the gas vent or chimney to which the water heater vent is
going to be connected, and as centralized with the water pip
ing system as possible. The water heater, as all water heaters,
wiU eventually leak. Do not install without adequate drainage
provisions where water flow will cause danu^.
ACAUTION
WATER HEATERS EVENTUAU.Y LEAK: Installation of the
water heater must be accomplished in such a manner that if
the tank or aiqr connections should leak, the flow of water will
not cause darrage to the structure. When such locations can
not be avoided, a suitable drain pan should be installed under
the water heater. Drain pans are awailable at your local Sears
store. Such a drain pan must be not greater than V/t inches
deep, have a minimum length and width of at least 2 inches
greater than the water heater dimensions and must be piped
to an adequate drain. The pan must not restrict combustion air
flow. Under no circumstances is the manufecturer or Sears to
be held liable for any water damage in connection with this
water heater.
The location selection must provide adequate clearances for ser
vicing and proper operation of the water neater.
This water heater must not be installed directly on carpeting.
Carpeting must be protected by a metal or wood panel
beneath tee appliance extending beyond tee foil width and
depth of tee appliance by at least 3 inches (76.2mm) in any
direction, or if tee appliance is installed in an alcove or doset,
the entire floor must be covered by the panel. Failure to heed
this warning may result in afire hazard.
Minimum clearances between the water heater and com
bustible construction are I" at the sides and rear, f" at the
front, and 6" from the vent pipe. Clearance from tee top of the
jacket is 18" on most models. Note that a lesser dimension may
be allowed on some models. Refer to the label on the water
heater adjacent to the gas control valve fr>r all clearances.
VENTllATION
opeÌÌSvgs
AWARNING
AWARNING
I'MIN.
AWARNING
INSTMIATIONS IN A№AS WHE№ FLAMMABLE UQUIDS
(VAPORS) ARE LIKELY TO BE PRESENT OR STORED
(GARAGES, STORAGE, AND UTILITY AREAS, ETC):
FlammaUe liquids (such as gasoHne, solvents, propane (LP) or
butane, etc.), all of which emit flammable vapors, may be
improperly stored or used in such areas. The gas water heater
pilot light or main burner can ignite such vapors. The resulting
flashback and lire can cause deitth or serious bums to anyone h
the area, as welt as property damage.
If installation in su^ areas is your only option, then the installa
tion must be accomplished in a way that tiw pilot flame and
main burner flame are elevated from the floor at lea^ 18 inches.
While this may reduce the chances of flammable vapors from a
floor spill being ignited, gasoline and other flunmable substances
should never be stored or used in the same room or area con
taining a gas water heater or other opoi flame or spark produc
ing appliance.
NOTE: Flammable vapors may be drawn by air currents from
other areas of the structure to the appliance.
AWARNING
Propellants of aerosol sprays and volatile compounds, (clean
ers, chlorine based chemicals, refrigerants, etc.) bt addition to
being highly flammable in many cases, will also change to cor
rosive hydrochloric acid when exposed to the combustion
products of the water heater. The results can be hazardous,
and also cause product foilure.
Figure I
AJR DUCT
AWARNING
A gas water heater cannot operate properly without the cor
rect amount of ah- for combustion. Do not install in a confined
area such a doset, unless you provide air as shown in tee “Facts
to Consider About the Location" section. Never obstruct the
flow of ventilation air. If you have any doubts or questions at all,
call your gas company. Fêlure to provide the pro^ amount of
combustion air can result in a fire or explosion and can cause
DEATH, SERIOUS BODILY INJUf«; OR PROPERTY DAMAGE.
AWARNING
If this water heater will be used in beauty shops, barber shops,
cleaning establishments, or self-service laundries with dry
cleaning equipment, it is imperative that the water heater or
water heaters be installed so that combustion and ventilation
air be taken from outside these areas. Refer to the "Facts to
Consider About the Location" section of this manual and also
the latest edition of the National Fuel Gas Code, ANSI Z223.I,
also referred to as NF№ 54 for specifics provided concerning
air required.
Installation Instructions (cont’d)
Combustion Air and Ventilation
for Appliances Located in
Unconfined Spaces
Unoonfined Space is a space whose volume is not less than 30
cubic feet per 1,000 Btu per hour of the aggregate input rating
of all appliances installed in that space. Rooms communicating
directly with the space in which the appliances are installed,
through openings not furnished with doors, are considered a
)art of the unconfincd space
f
n unconñned spaces in buildings, infiltration may be adequate
to provide air for combustion, ventilation and dilution or flue
gases. However, in buildings of tight construction (for example,
weather stripping, heavily insulated, caulked, vapor barrier, etc,),
additional air may need to be provided using the methods
described in Combustion Air and Ventilation for Appliances
Located in Confined Spaces, b.
Combustion Air and Ventilation
for Appliances Located in
Confined Spaces ,
Confined Space is a space whose volume is less than 30 cubic
feet per 1,000 Btu per hour of the agrégate input rating of all
appliances installed in that space,
a. ALL AIR FROM INSIDE BUILDINGS:
(See Page 8 Figure 1, and Figure 2 below)
The confined space shall be provided with two permanent
o^ni^ communicating directly with an additional room(s)
of sufficient volume so that the combined volume of all
spaces meets the criteria for an unconñned space. The total
input of all gas utilization equipment installed in the com
bined space shall be considered in making this determination.
Each opening shall have a minimum free area of one square
inch per 1,000 BTU per hour of the total input rating of all
gas utilization equipment in the confined space, but not less
than 100 square inches. One opening shall commence within
12 inches of the top and one commencing within 12 inches
of the bottom of the enclosure.
1. When difcctly communicating with the outdoors, each open-
itie shall have a minimum free area of 1 square inch per 4,000
BTU per hour of total input rating of all equipment in the
enclosure. (See Figure 3.)
2. When communicating with the outdoors through vertical
ducts, each opening shall have a minimum free area of 1
square inch per 4,000 BTU per hour of total input rating of
all equipment in the enclosure. (See Figure 4.)
Figure 4
3. When communicating with the outdoors through horizontal
ducts, each opening shall have a minimum free area of 1
square inch per 2,000 BTU per hour of total input rating of
all equipment in the enclosure. (See Figure 5.)
CHIMNEY ОЯ GAS VENT
01ЛЪЕТ AIR DUCT
Figure 2
b. ALL AIR FROM OUTDOORS: (see Figures 3-3)
The confined space shall be provided with two permanent
openings, one commencing within 12 inches of the top and
one commencing within 12 inches from the bottom of the
enclosure. The openings shall communicate directly, or by
ducts, with the outdoors or spaces (crawl or attic) that freely
communicate with the outdoors.
Figure 3
CHNNEY OG GAS VENT
,.VENTHAT)ON LOUVERS
hanIglalKI
WATER HEATER
•FURNACE
MLET AIR DUCT
ALT.MLETAJn VENTILATIQN LQUVSRS
Figure 5
4. When ducts arc used, they shall be of the same cross-sectional
area as the free area of the openings to which they connect.
The minimum short side dimension of rectangular air ducts
shall not be less than 3 inches. (Sec Figure 5.)
3. Louvers and Grilles: In calculating free area, consideration
shall be given to the blocking effect of louvers, grilles or
screens protecting opening. Screens used shall not be smaller
Yi inch mesh. If the free area through a design of louver
than
or grille is known, it should be used in calculating the size
opening required to provide the free area specified. If the
design and free area is not known, it may be assumed that
wood louvers will be 20-25 percent free area and metal louvers
and grilles will have 60-75 percent free area. Louvers and
grilles shall be fixed in the open position or interlocked vnth
the equipment so that they are opened automatically during
equipment operation.
6. Special Conditions Created by Mechanical Exhausting or
Fireplaces: Operation of exhaust fans, ventilation systems,
clothes dryers or fireplaces may create conditions requiring
special attention to avoid unsatisiactory operation of installed
gas utilization equipment.
INLET AIR DUCT
10
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