
37406-5-0320 Page 5
Ventilation and Combustion Air
Wall furnaces shall be installed in a location in which the facilities
for ventilation permit satisfactory combustion of gas and proper
venting under normal conditions. In buildings of conventional
frame,brick,orstoneconstructionwithouttightstormwindows
anddoors,inltrationisnormallyadequatetoprovideairforcom-
bustion and draft hood dilution.
Whereappliancesareinstalledinconnedandunconned
spaces within a building, the building being of unusually tight
construction, air for combustion and ventilation must be obtained
directly from outdoors or from such spaces that freely communi-
catewiththeoutdoors.Undertheseconditions,theconnedand
unconnedspacesshallbeprovidedwithtwopermanentopen-
ings, one near the top of the enclosure and one near the bottom;
each opening shall have a free area of not less than one square
inch (6.45cm2) per 2,000 BTU hr. (.6KW/H) of total input.
Qualied Installing Agency
Installation and replacement of gas piping, gas utilization equip-
ment or accessories and repair and servicing of equipment shall
beperformedonlybyaqualiedagency.Theterm“qualied
agency”meansanyindividual,rm,corporationorcompany
which either in person or through a representative is engaged
in and is responsible for (a) the installation or replacement of
gas piping or (b) the connection, installation, repair or servicing
ofequipment,whoisexperiencedinsuchwork,familiarwithall
precautions required and has complied with all the requirements
oftheauthorityhavingjurisdiction.
Commonwealth of Massachusetts: The installation must be
madebyalicensedplumberorgastterintheCommonwealth
of Massachusetts.
The installation must conform with local codes or, in the absence
oflocalcodes,withtheNationalFuelGasCode,ANSIZ223.1/
NFPA54*NaturalGasandPropaneInstallationCode,CSA
B149.1.
*Available from the American National Standards Institute, Inc.,
11 West 42nd St., New York, N.Y. 10036.
Clearances
1. In selecting a location for installation , it is necessary to provide
adequate accessibility clearances for servicing and proper
installation.
2. The FAW-55 can be attached to the wall or recessed into the
wall up to 4 inches (102mm) in depth.
3. The wall in which the furnace is recessed has (0) zero (0mm)
clearance to the furnace sides and top.
4. When using side discharge registers, SOR-1 or SOK-1, the
furnace cannot be recessed into the wall.
5. Clearance to sidewall or combustible material is 4 inches
(102mm).
6. Ceiling clearance is 7 1/2 inches (191mm)
7. Floor and rear wall clearance is (0) zero inches (0mm).
8. Clearanceof18inches(457mm)isrequiredtoadjacentwall
orcombustiblematerialwhenushedmountedSOR-1,side
outlet register is used.
Before Installing Consider The Following Venting
1. Achimney for residential-type or low-heat gas utilization equip-
mentshallextendatleast3feet(914mm)abovethehighest
point where it passes through a roof of a building and at least
2 feet (610mm) higher than any portion of building within a
horizontal distance of 10 feet (3m).
2. Thisfurnacemustnotbeconnectedtoachimneyueserving
a separate solid-fuel burning appliance.
3. Uninsulated Single-Wall Metal Pipe shall not be used outdoors
in cold climates for venting gas utilization equipment.
4. Attention! This Fan Type Vented Wall Furnace is equipped with
aventsafetyswitch.Intheeventofspillageofueproducts
due to improper venting the vent safety switch will open, which
results in the main burners to “shut off.”
Refer to Figure 1 and Page 12 for additional information regarding
U.L. Listed gas vent equipment.
Installing Optional Side Outlets
Side outlet register, SOR-1 may be installed on one or both sides
of the furnace at the required clearances of 18 inches (457mm) to
adjacentwallorcombustiblematerialasshowninFigure 2.
1. Locate and cut the 5 1/2” (140mm) square opening inthe cabinet
sideusingthetemplatefromthekit,exposingtheinnerliner
knock-out.
2. Removetheknock-out.
3. Place the register on the 5 1/2” (140mm) opening with the
louverssetforthedesireddirectionandmarkthemounting
holes using the register as a template.
4. Drill two (2) 1/8” (3mm) diameter holes in cabinet side and
fastentheregisterinplacewithtwo(2)#10x1”(25mm)screws
provided.
Sideoutletkit,10”(254mm)bootassemblywithregister,SOK-1for
warmairdischargeintoanadjoiningroommaybeinstalledoneither
side of the furnace at the required clearance of 4 inches (102mm)
toadjacentwallasshowninFigure 3A.
1. Locate and cut the 5 1/2” (140mm) square opening inthe cabinet
sideusingthetemplatefromthekit,exposingtheinnerliner
knock-out.
2. Removetheknock-out.
3. Usingtheinnerandouterbootsasholetemplates,markand
drill (8) 1/8” (3mm) diameter holes in the inner liner and cabinet
side.
4. Using Figure 3A locate and cut a 6 3/4” (171mm) square open-
ing through walls.
5. Attach furnace to wall (see Attaching Furnace to Wall).
6. Withfurnaceinplace,aftercheckingalignmentofsideoutlet
openinginwallandfurnace,placethe93/8”x93/8”(238mm
x238mm)sideoutletwallplateoverouterboot,passtheouter
boot through the wall and attach side outlet wall plate to furnace
sideofwallwith(2)#10x1”(25mm)screwsprovided.
7. Fastenouterboottothecabinetsidewith(4)#8x1/4”(6mm)
screws provided.
8. Positionandattachinnerboottoinnerlinerwith(4)#8x1/4”
(6mm) screws provided.
9. Locate the register with its louvers positioned for the desired
airdischargedirectionandmarkthemountingholesusingthe
register as a template.
10. Drill (2) 1/8” (3mm) diameter holes in the wall and fasten the
registerinplacewith(2)#10x1”(25mm)screwsprovided.
Installing Optional Rear Outlet
Rearoutletkit,10”(254mm)bootassemblywithregister,ROK-1
forwarmairdischargeintoanadjoiningroom.
Attention: Before furnace is attached to the wall, the wall opening
for the rear outlet must be cut, in addition to removal of the outer
andinnercasingknockoutsonfurnace.
1. The wall opening measurements for the rear outlet are the
following.
A.Fromoortobottomofwallopeningis143/4”(375mm).
B. Fromthe bottom of wall opening to topof wall opening is
8 1/2” (216mm).
C. Wall opening width is 12 1/8” (308mm).
2.Removeoutercasingknockoutfromoutercasingback.
3.Removeinnercasingknockoutfrominnercasing.
4. Attach furnace to wall (see Attaching Furnace to Wall).