Desa Glo-Warm FA-20BB Quick start guide

BLUE FLAME
VENT-FREE NATURAL GAS HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
Save this manual for future reference.
®
FA-20BB
FAS-20BB
FA-30BB
FAS-30BB
FGH-30NGB
20,000 and 30,000
Btu/Hr Models
WARNING: If the information in this manual is
not followed exactly, a fire or explosion may
result causing property damage, personal
injury, or loss of life.
— 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.
• Donottouchanyelectricalswitch;donotuse
any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
• Ifyou cannot reachyour gas supplier,call the
fire department.
— Installation and service must be performed by
a qualified installer, service agency, or the
gas supplier.
This appliance may be installed in an aftermarket* manufactured (mobile) home, where not prohib-
ited by state or local codes.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
WARNING:Thisisanunvented
gas-firedheater.Itusesair(oxy-
gen) from the room in which it
is installed. Provisions for ad-
equatecombustionandventi-
lation air must be provided.
Refer to Air For Combustion
andVentilation sectiononpage
4 of this manual.
WARNING: Improper instal-
lation,adjustment,alteration,
service, or maintenance can
causeinjuryorpropertydam-
age. Refer to this manual for
correct installation and op-
erationalprocedures.Foras-
sistance or additional infor-
mationconsultaqualifiedin-
staller,serviceagency,orthe
gas supplier.

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105568
BLUE FLAME NATURAL GAS HEATER
Carbon Monoxide Poisoning: Early
signs of carbon monoxide poisoning re-
semble the flu, with headaches, dizziness,
ornausea.Ifyouhavethesesigns,theheater
maynotbeworkingproperly. Getfreshair
atonce!Haveheaterserviced.Somepeople
are more affected by carbon monoxide than
others.Theseincludepregnantwomen,per-
sons with heart or lung disease or anemia,
those under the influence of alcohol, and
those at high altitudes.
Natural Gas: Natural gas is odorless. An
odor-making agent is added to natural gas.
Theodorhelpsyoudetectanaturalgasleak.
However, the odor added to natural gas can
fade.Naturalgasmaybepresenteventhough
no odor exists.
Make certain you read and understand all
Warnings. Keep this manual for reference.
It is your guide to safe and proper operation
of this heater.
SAFETY
INFORMATION
1. This appliance is only for use with the
typeof gas indicatedon therating plate.
Thisappliance is not convertible foruse
with other gases.
2. If you smell gas
• shut off gas supply
• 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
• ifyou cannotreach yourgas supplier,
call the fire department
3. This heater shall not be installed in a
bedroom or bathroom.
4. Never install the heater
• in a recreational vehicle
• wherecurtains, furniture, clothing, or
otherflammable objects are less than
36inches from the front, top, or sides
of the heater
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
5. This heater needs fresh, outside air ven-
tilation to run properly.This heater has
an oxygen depletion sensor (ODS) pi-
lot light safety system. The ODS shuts
down the heater if not enough fresh air
is available. See Air for Combustion
and Ventilation, pages 4 through 6.
6. Keep all air openings in front and bot-
tom of heater clear and free of debris.
This will insure enough air for proper
combustion.
7. If heater shuts off, do not relight until
you provide fresh, outside air. If heater
keeps shutting off, have it serviced.
WARNING ICON G 001
WARNINGS
IMPORTANT: Read this Owner’s
Manual carefully and completely
before trying to assemble, oper-
ate, or service this heater. Im-
proper use of this heater can
causeseriousinjuryordeathfrom
burns, fire, explosion, electrical
shock, and carbon monoxide
poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!
WARNING: Any change to
this heater or its controls can be
dangerous.
8. Do not run heater
• where flammable liquids or vapors
are used or stored
• under dusty conditions
9. Before using furniture polish, wax, car-
pet cleaner, or similar products, turn
heater off. If heated, the vapors from
theseproducts may create a white pow-
der residue within burner box or on
adjacent walls or furniture.
10. Never place any objects on the heater.
11. Surface of heater becomes very hot
whenrunning heater.Keepchildren and
adults away from hot surface to avoid
burns or clothing ignition. Heater will
remain hot for a time after shutdown.
Allow surface to cool before touching.
12. Carefully supervise young children
when they are in same room with
heater.
13. Make sure grill guard is in place be-
fore running heater.
14. Do not use heater if any part has been
under water. Immediately call a quali-
fied service technician to inspect the
room heater and to replace any part of
the control system and any gas control
which has been under water.
15. Turn off and unplug heater and let cool
before servicing. Only a qualified ser-
vice person should service and repair
heater.
16. Operating heater above elevations of
4,500 feet could cause pilot outage.

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105568
OWNER’S MANUAL
PRODUCT
IDENTIFICATION
LOCAL CODES
Install and use heater with care. Follow all
localcodes.Intheabsenceoflocalcodes,use
the latest edition of National Fuel Gas Code
ANS Z223.1, also known as NFPA 54*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
UNPACKING
1. Remove heater from carton.
2. Remove all protective packaging ap-
plied to heater for shipment.
3. Check heater for any shipping damage.
If heater is damaged, promptly inform
dealer where you bought heater.
Figure 1 - Vent-Free Natural Gas Heater (Models FAS-20BB Shown)
Ignitor Button Control Knob
Heater
Cabinet
Front
Panel
PRODUCT
FEATURES
SAFETY DEVICE
This heater has a pilot with an Oxygen
Depletion Sensor Shutoff System (ODS).
TheODS/pilotisarequiredfeatureforvent-
free room heaters. The ODS/pilot shuts off
the heater if there is not enough fresh air.
PIEZO IGNITION SYSTEM
This heater has a piezo ignitor. This system
requires no matches, batteries, or other
sources to light heater.
THERMOSTATIC HEAT
CONTROL ON THERMOSTAT
MODELS FAS-20BB AND
FAS30-BB
These heaters have a control valve with a
thermostat sensing bulb. This results in the
greatest heater comfort and may result in
lower gas bills.
Glass
Panel
Grill
Guard

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105568
BLUE FLAME NATURAL GAS HEATER
AIR FOR
COMBUSTION AND
VENTILATION
Today’s homes are built more energy effi-
cient than ever. New materials, increased
insulation, and new construction methods
helpreduceheatlossinhomes.Homeowners
weatherstrip and caulkaround windows and
doorstokeepthecoldairoutandthewarmair
in. During heating months, home owners
want their homes as airtight as possible.
While it is good to make your home energy
efficient,your home needs to breathe.Fresh
air must enter your home. All fuel-burning
appliances need fresh air for proper com-
bustion and ventilation.
Exhaustfans,fireplaces,clothesdryers, and
fuel burning appliances draw air from the
house to operate. You must provide ad-
equate fresh air for these appliances. This
will insure proper venting of vented fuel-
burning appliances.
WARNING: This heater shall
not be installed in a confined
space or unusually tight con-
struction unless provisions are
provided for adequate combus-
tion and ventilation air. Read the
following instructions to insure
properfreshairforthisandother
fuel-burning appliances in your
home.
PROVIDING ADEQUATE
VENTILATION
The following are excerpts from National
Fuel Gas Code. NFPA 54/ANS Z223.1, Sec-
tion5.3,AirforCombustionandVentilation.
Allspacesinhomesfallintooneofthethree
following ventilation classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The information on pages 4 through 6 will
help you classify your space and provide
adequate ventilation.
Unusually Tight Construction
The air that leaks around doors and win-
dows may provide enough fresh air for
combustion and ventilation. However, in
buildings of unusually tight construction,
you must provide additional fresh air.
Unusually tight construction is de-
fined as construction where:
a. walls and ceilings exposed to the
outside atmosphere have a con-
tinuous water vapor retarder with
a rating of (one perm 6x10-11 kg
per pa-sec-m2) or less with open-
ings gasketed or sealed and
b. weather stripping has been
added on openable windows and
doors and
c. caulking or sealants are applied
to areas such as joints around
window and door frames, be-
tween sole plates and floors,be-
tween wall-ceiling joints, be-
tween wall panels, at penetra-
tionsforplumbing,electrical,and
gas lines, and at other openings.
If your home meets all of the three
criteria above, you must provide ad-
ditional fresh air. See Ventilation Air
From Outdoors , page 6.
If your home does not meet all of the
three criteria above, proceed to De-
termining Fresh-Air Flow For Heater
Location , page 5.
Confined and Unconfined Space
The National Fuel Gas Code (ANS Z223.1,
1992 Section 5.3) defines a confined space
as a space whose volume is less than 50
cubicfeetper1,000Btuperhour(4.8m3per
kw) of the aggregate input rating of all
appliances installed in that space and an
unconfiningspaceasaspacewhosevolume
is not less than 50 cubic feet per 1,000 Btu
per hour (4.8 m3per kw) of the aggregate
inputratingofallappliancesinstalledinthat
space.Roomscommunicatingdirectly with
the space in which the appliances are in-
stalled*, through openings not furnished
with doors, are considered a part of the
unconfined space.
This heater shall not be installed in a con-
fined space or unusually tight construction
unlessprovisions are providedfor adequate
combustion and ventilation air.
*Adjoiningroomsarecommunicatingonly
iftherearedoorlesspassagewaysorventila-
tion grills between them.

5
105568
OWNER’S MANUAL
AIR FOR
COMBUSTION AND
VENTILATION
Continued
DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION
Determining if You Have a Confined or Unconfined Space
Use this worksheet to determine if you have a confined or unconfined space.
Space:Includestheroominwhichyouwillinstallheaterplusanyadjoiningroomswithdoorlesspassagewaysorventilationgrillsbetween
the rooms.
1. Determine the volume of the space (length x width x height).
Length x Width x Height = _________________cu. ft. (volume of space)
Example: Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) = 2560 cu. ft. (volume of space)
If additional ventilation to adjoining room is supplied with grills or openings, add the volume of these rooms to the total volume of
the space.
2. Divide the space volume by 50 cubic feet to determine the maximum Btu/Hr the space can support.
_________________ (volume of space) ÷50 cu. ft. = (Maximum Btu/Hr the space can support)
Example: 2560 cu. ft. (volume of space) ÷50 cu. ft. = 51.2 or 51,200 (maximum Btu/Hr the space can support)
3. Add the Btu/Hr of all fuel burning appliances in the space.
Vent-free heater ___________________Btu/Hr
Gas water heater* ___________________Btu/Hr
Gas furnace ___________________Btu/Hr
Vented gas heater ___________________Btu/Hr
Gas fireplace logs ___________________Btu/Hr
Other gas appliances* +___________________Btu/Hr
Total =___________________Btu/Hr
* Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors and vents to the outdoors.
4. Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used.
_________________ Btu/Hr (maximum the space can support)
_________________ Btu/Hr (actual amount of Btu/Hr used)
Example: 51,200 Btu/Hr (maximum the space can support)
60,000 Btu/Hr (actual amount of Btu/Hr used)
ThespaceintheaboveexampleisaconfinedspacebecausetheactualBtu/HrusedismorethanthemaximumBtu/Hrthespacecansupport.
You must provide additional fresh air. Your options are as follows:
A. Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined space, remove door to adjoin-
ing room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 6.
B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 6.
C. Install a lower Btu/Hr heater, if lower Btu/Hr size makes room unconfined.
If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space is an unconfined space. You will need no
additional fresh air ventilation.
Continued
Example:
Gas water heater 40,000 Btu/Hr
Vent-free heater +20,000 Btu/Hr
Total =60,000 Btu/Hr
WARNING:Iftheareainwhichtheheatermaybeoperatedissmallerthanthatdefinedasanunconfinedspace,
or if building is of unusually tight construction, provide adequate combustion and ventilation air by one of the
methods described in the National Fuel Gas Code, ANS Z223.1, 1992, Section 5.3 or applicable local codes.

6
105568
BLUE FLAME NATURAL GAS HEATER
Figure 3 - Ventilation Air from Outdoors
Outlet
Air Ventilated
Attic
Outlet
Air
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two per-
manent openings: one within 12" of the
ceiling and one within 12" of the floor.
Connecttheseitemsdirectlytotheoutdoors
orspacesopentotheoutdoors.Thesespaces
include attics and crawl spaces. Follow the
National Fuel Gas Code NFPA 54/ANS
Z223.1,Section5.3,AirforCombustionand
Ventilation for required size of ventilation
grills or ducts.
IMPORTANT: Do not provide openings
for inlet or outlet air into attic if attic has a
thermostat-controlled power vent. Heated
air entering the attic will activate the power
vent.
AIR FOR
COMBUSTION AND
VENTILATION
Continued
Or
Remove
Door into
Adjoining
Room,
Option 3
Ventilation Grills
Into Adjoining Room,
Option 2
12"
12"
Ventilation
Grills
into Adjoining
Room,
Option 1
VENTILATION AIR
Ventilation Air From Inside
Building
Thisfreshairwouldcomefromanadjoining
unconfined space. When ventilating to an
adjoining unconfined space, you must pro-
vide two permanent openings: one within
12" of the ceiling and one within 12" of the
floor on the wall connecting the two spaces
(seeoptions1and2,Figure2).Youcanalso
remove door into adjoining room (see op-
tion 3, Figure 2). Follow the National Fuel
Gas Code NFPA 54/ANS Z223.1, Section
5.3, Air for Combustion and Ventilation for
required size of ventilation grills or ducts.
Figure 2 - Ventilation Air from Inside Building
WARNING: Rework work-
sheet, adding the space of the
adjoiningunconfinedspace.The
combined spaces must have
enough fresh air to supply all
appliances in both spaces.

7
105568
OWNER’S MANUAL
36"
2"
FLOOR
CEILING
Minimum
Minimum to Top
of Carpeting, Tile,
or Other Combustible
Material
6"
Minimum
From
Sides of
Heater
Left
Side
Right
Side
INSTALLATION
Continued
CHECK GAS TYPE
Use only natural gas. If your gas supply is
notnatural,do not installheater. Call dealer
where you bought heater for proper type
heater.
INSTALLATION ITEMS
Beforeinstallingheater,makesureyouhave
the items listed below:
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• manual shutoff valve *
• ground joint union
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
*AnA.G.A.design-certifiedmanualshutoff
valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Pur-
chase the optional A.G.A. design-certified
manual shutoff valve from your dealer. See
Accessories, page 19.
NOTICE: A qualified service per-
son must install heater. Follow
all local codes.
WARNING:Maintainthemini-
mumclearancesshowninFigure
4.Ifyoucan,providegreaterclear-
ancesfromfloor,ceiling,andjoin-
ing wall. CAUTION: If you install the
heater in a home garage
• heaterpilotandburnermustbe
at least 18 inches above floor
• locateheaterwheremovingve-
hicle will not hit it
IMPORTANT: Vent-freeheatersaddmois-
ture to the air. Although this is beneficial,
installing heater in rooms without enough
ventilation air may cause mildew to form
from too much moisture. See Air for Com-
bustion and Ventilation, pages 4 through 6.
CAUTION: This heater cre-
ates warm air currents. These
currents move heat to wall sur-
faces next to heater. Installing
heater next to vinyl or cloth wall
coverings or operating heater
where impurities (such as to-
bacco smoke, aromatic candles,
cleaning fluids, oil or kerosene
lamps, etc.) in the air exist, may
discolor walls.
WARNING: Never install the
heater
• in a bedroom or bathroom
• in a recreational vehicle
• where curtains, furniture,
clothing, or other flammable
objectsarelessthan36inches
from the front, top, or sides of
the heater
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
Youcan locate heateron floor, away from a
wall. An optional floor mounting stand is
needed. Purchase the floor mounting stand
fromyourdealer.SeeAccessories,page 19.
NOTICE: This heater is intended
foruseassupplementalheat.Use
this heater along with your pri-
mary heating system. Do not in-
stall this heater as your primary
heatsource. If you haveacentral
heating system, you may run
system’scirculatingblowerwhile
usingheater.Thiswillhelpcircu-
late the heat throughout the
house. In the event of a power
outage, you can use this heater
as your primary heat source.
LOCATING HEATER
Thisheaterisdesignedtobemountedonawall.
Figure4-MountingClearancesAsViewed
From Front of Heater
Forconvenienceandefficiency,installheater
• where there is easy access for operation,
inspection, and service
• in coldest part of room
An optional fan kit is available from your
dealer. See Accessories, page 19. If plan-
ningto usefan,locateheaternearanelectri-
cal outlet.
INSTALLING HEATER TO
WALL
Mounting Bracket
The mounting bracket is located on back
panel of heater. It has been taped there for
shipping. Remove mounting bracket from
back panel.
Mounting
Bracket
Figure 5 - Mounting Bracket

8
105568
BLUE FLAME NATURAL GAS HEATER
Attaching Mounting Bracket To
Wall
Note: Wall anchors, mounting screws, and
spacers are in hardware package. The hard-
ware package is provided with heater.
Models FA-30BB, FAS-30BB, and
FGH-30NGB
Models FA-20BB and FAS-20BB
Figure 7 - Mounting Bracket Clearances
Figure 8 - Folding Anchor
WARNING:Maintainminimum
clearances shown in Figure 7. If
you can, provide greater clear-
ancesfromfloorandjoiningwall.
Figure6-RemovingFrontPanelOfHeater
Methods For Attaching
Mounting Bracket To Wall
Only use last hole on each end of mounting
bracket to attach bracket to wall. These two
holes are 16 inches apart from their centers.
Attach mounting bracket to wall in one of
two ways:
1. Attaching to wall stud
2. Attaching to wall anchor
Attaching To Wall Stud
This method provides the strongest hold.
Insert mounting screws through mounting
bracket and into wall studs.
Attaching To Wall Anchor
This method allows you to attach mounting
bracket to hollow walls (wall areas between
studs)ortosolid walls (concrete ormasonry).
Decidewhichmethodbettersuitsyourneeds.
Eithermethodwillprovideasecureholdfor
the mounting bracket.
Removing Front Panel Of Heater
1. Remove two screws near bottom cor-
ners of front panel.
2. Liftstraightupongrillguarduntilitstops.
Grill guard will slide up about 1/4".
3. Pull bottom of front panelforward, then
down.
4. Remove cardboard packing from grill
and glass.
INSTALLATION
Continued
Marking Screw Locations
1. Tape mounting bracket to wall where
heater will be located. Make sure
mounting bracket is level.
2. Mark screw locations on wall (see Fig-
ure 7).
Note: Only mark last hole on each end
of mounting bracket. Insert mounting
screws through these holes only.
3. Remove tape and mounting bracket
from wall.
Attaching To Wall Stud Method
Forattachingmountingbrackettowallstuds
1. Drill holes at marked locations using
9/64" drill bit.
2. Place mounting bracket onto wall. Line
uplast hole on each end of bracket with
holes drilled in wall.
3. Insert mounting screws through bracket
and into wall studs.
4. Tighten screws until mounting bracket
is firmly fastened to wall studs.
Attaching To Wall Anchor Method
For attaching mounting bracket to hollow
walls (wall areas between studs) or solid
walls (concrete or masonry)
1. Drill holes at marked locations using
5/16"drill bit. For solid walls (concrete
or masonry), drill at least 1" deep.
2. Fold wall anchor as shown in Figure 8.
3. Insert wall anchor (wings first) into
hole. Tap anchor flush to wall.
4. For thin walls (1/2" or less), insert red
key into wall anchor. Push red key to
“pop” open anchor wings.
IMPORTANT: Do not hammer key!
Forthick walls (over1/2" thick) or solid
walls, do not pop open wings.
5. Place mounting bracket onto wall. Line
uplast hole on each end of bracket with
wall anchors.
6. Insert mounting screws through bracket
and into wall anchors.
7. Tighten screws until mounting bracket
is firmly fastened to wall.
Figure 9 - Popping Open Anchor Wings
For Thin Walls
17
1
/ 2 "
Min.
10
1
/ 4 "
Min. 17
3
/ 8 "
Adjoining Wall
Only Insert Mounting
Screws Through Last
Hole On Each End
Floor
17
3
/ 8 "
17
1
/ 2 "
Min.
6
1
/ 2 "
Min.
Adjoining Wall
Only Insert Mounting
Screws Through Last
Hole On Each End
Floor

9
105568
OWNER’S MANUAL
Tee Joint
Pipe Nipple
Cap
INSTALLATION
Continued
Figure 11 - Installing Bottom Mounting
Screws
Figure 10 - Mounting Heater Onto Mount-
ing Bracket
Horizontal Slots
Mounting Bracket
(attached to wall)
Stand-Out Tab
Placing Heater On Mounting
Bracket
1. Locate two horizontal slots on back
panel of heater.
2. Place heater onto mounting bracket.
Slidehorizontalslotsontostand-out tabs
on mounting bracket (see Figure 10).
Installing Bottom Mounting
Screws
1. Locate two bottom mounting holes.
These holes are near bottom on back
panel of heater (see Figure 11).
2. Mark screw locations on wall.
3. Remove heater from mounting bracket.
4. If installing bottom mounting screws
into hollow or solid wall, install wall
anchors. Follow steps 1 through 4 un-
der Attaching To Wall Anchor Method,
page 8.
If installing bottom mounting screw
into wall stud, drill holes at marked lo-
cations using 9/64" drill bit.
5. Replace heater onto mounting bracket.
6. Place spacers between bottom mount-
ingholesandwallanchor or drilled hole.
Continued
CONNECTING TO GAS
SUPPLY
NOTICE: A qualified service per-
son must connect heater to gas
supply. Follow all local codes.
WARNING: Never connect
heater to private (non-utility) gas
well.Thisgasiscommonlyknown
as wellhead gas.
Typical Inlet Pipe Diameters
FA-20BB, 3/8" or greater
FAS-20BB
FA-30BB, 1/2" or greater
FAS-30BB,
FGH-30NG
Installation must include a manual shutoff
valve, union, and plugged 1/8" NPT tap.
Locate NPT tap within reach for test gauge
hook up. NPT tap must be upstream from
heater (see Figure 12).
Apply pipe joint sealant lightly to male
threads. This will prevent excess sealant
fromgoing into pipe. Excess sealantin pipe
could result in clogged heater valves.
Installsedimenttrapinsupplylineasshown
in Figure 12. Locate sediment trap where it
is within reach for cleaning. Locate sedi-
menttrap where trapped matter is not likely
to freeze. A sediment trap traps moisture
and contaminants. This keeps them from
going into heater controls. If sediment trap
is not installed or is installed wrong, heater
may not run properly.
Holdpressureregulator with wrenchwhen
connecting it to gas piping and/or fittings.
CAUTION: Use only new,
black iron or steel pipe. Inter-
nally-tinned copper tubing may
be used in certain areas. Check
yourlocalcodes.Usepipeoflarge
enough diameter to allow proper
gas volume to heater. If pipe is
too small, undue loss of pres-
sure will occur.
CAUTION:Usepipejointseal-
antthatisresistanttonaturalgas.
IMPORTANT: Check gas linepressure be-
fore connecting heater to gas line. Gas line
pressure must be no greater than 14 inches
of water. If gas line pressure is higher,
heater regulator damage could occur.
Figure 12 - Gas Connection
* An A.G.A. design-certified manual shutoff valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Purchase the optional A.G.A. design-certified manual
shutoff valve from your dealer. See Accessories, page 19.
7. Hold spacer in place with one hand.
With otherhand, insertmounting screw
through bottom mounting hole and
spacer. Place tip of screw in opening
of wall anchor or drilled hole.
8. Tightenbothscrewsuntilheater is firmly
secured to wall. Do not over tighten.
Note: Do not replace front panel at this
time. Replace front panel after making
gasconnections andchecking forleaks.
(see page 10).
Pressure
Regulator
Test
Gauge
Connection *
3/8" NPT
Pipe Nipple
Sediment
Trap 3" Minimum
Typical Inlet
Pipe from
Gas Meter
(4" W.C. to
10.5" W.C.
Pressure)
Heater
Cabinet
Ground
Joint Union
Tee Joint
Reducer Bushing
to 1/8" NPT
1/8" NPT Plug Tap
Manual Shutoff
Valve *

10
105568
BLUE FLAME NATURAL GAS HEATER
O
N
POSI
T
O
PO
S
Figure 13 - Manual Shutoff Valve
Figure 14 - Checking Gas Joints
Manual
Shutoff
Valve
Closed
WARNING: Test all gas pip-
ing and connections for leaks
after installation or servicing.
Correct all leaks at once.
WARNING:Neveruseanopen
flame to check for a leak. Apply a
mixture of liquid soap and water
toalljoints.Bubblesformingshow
a leak. Correct all leaks at once.
Pressure Testing Gas Supply
Piping System
TestPressuresInExcessOf1/2PSIG
(3.5 K Pa)
1. Disconnect heater and its individual
manual shutoff valve from gas supply
piping system. Pressures in excess of
1/2 psig will damage heater regulator.
2. Cap off open end of gas pipe where
manual shutoff valve was connected.
3. Pressurize supply piping system by ei-
ther using compressed air or opening
main gas valve located on or near gas
meter.
4. Check all joints of gas supply piping
system. Apply mixture of liquid soap
and water to gas joints. Bubbles form-
ing show a leak.
5. Correct all leaks at once.
CHECKING GAS
CONNECTIONS
INSTALLATION
Continued
TestPressuresEqualToorLessThan
1/2 PSIG (3.5 K Pa)
1. Close manual shutoff valve (see Fig-
ure 13).
2. Pressurize supply piping system by ei-
ther using compressed air or opening
main gas valve located on or near gas
meter.
3. Check all joints from gas meter to
manual shutoff valve (see Figure 14).
Apply mixture of liquid soap and wa-
ter to gas joints. Bubbles forming show
a leak.
4. Correct all leaks at once.
Open
Pressure Testing Heater Gas
Connections
1. Open manual shutoff valve (see Fig-
ure 13).
2. Open main gas valve located on or near
gas meter.
3. Make sure control knob of heater is in
the OFF position.
4. Check all joints from manual shutoff
valve to thermostat gas valve (see Fig-
ure 14). Apply mixture of liquid soap
and water to gas joints. Bubbles form-
ing show a leak.
5. Correct all leaks at once.
6. Light heater (see Operating Heater,
pages 11 and 12 for thermostat models
or pages 12 and 13 for non-thermostat
models). Check all other internal joints
for leaks.
7. Turn off heater (see To Turn Off Gas
to Appliance, page 12 for thermostat
models or page 13 for non-thermostat
models).
8. Replace front panel.
Manual
Shutoff Valve
Gas Meter
Gas Valve