9
441 01 2611 06
Figure 7
Venter Gasket
25--23--52b
Entry
25--23--52c
Main Line
4. Replace venter gasket (part # 1013540, if needed) to venter
assembly with adhesive in the same location as the old one.
5. Rotate venter assembly 90° right or left from original location
depending on venting configurations.
6. Tighten the three (3) orfour (4) screws that secure theventer
assembly to the collector box. Do tighten screws enough to
compress venter gasket.
7. Replace power leads to venter motor and reconnect hose to
pressure switch.
NOTE:Unused open vent hole must be covered. A Vent Cover is
suppliedwithVentPipeShieldKitNAHA002VC.A5
5
/
16
² diameter
VentCoverisavailableseparatelyfromyourdistributor,oronecan
be fabricated with sheet metal for all side vent installations.
4. Combustion & Ventilation Air
CARBON MONOXIDE POISONING HAZARD.
Failure to provide adequate combustion and
ventilationaircouldresultindeathand/orpersonal
injury.
Use methods described here to provide
combustion and ventilation air.
!
WARNING
Furnaces require ventilation openings to provide sufficient air for
propercombustion and ventilation of flue gases. Allduct or open -
ingsforsupplyingcombustionandventilationairmustcomplywith
thegas codes,orintheabsenceoflocalcodes,theapplicablena-
tional codes.
Combustion and ventilation air must be supplied in accordance
with one of the following:
1. Section8.3,AirforCombustionandVentilation,oftheNational
Fuel Gas Code, (NFGC), ANSI Z223.1--2002/NFPA 54--2002
in the U.S.,
2. Sections7.2,7.3,7.5,7.6,7.7,and7.8ofNationalStandardof
Canada, Natural Gas and Propane Installation Code
(NSCNGPIC), CSA B149.1--00 in Canada,
3. Applicable provisions of the local building code.
When the installation is complete, check that all appliances have
adequate combustion air and are venting properly. See Venting
AndCombustionAir Check in “5.GasVent Installation” Sec tion i n
this manual.
Contaminated Combustion Air
Installationsincertainareasortypesofstructurescouldcauseex -
cessive exposure to contaminated air having chemicals or halo-
gens that will result in safety and performance related problems
and may harm the furnace. These instances must use only out -
door air for combustion.
Thefollowingareasortypesofstructuresmaycontainorhaveex-
posure to the substances listed below. The installation must be
evaluated carefully as it may be necessary to provide outdoorair
for combustion.
· Commercial buildings.
· Buildings with indoor pools.
· Furnaces installed in laundry rooms.
· Furnaces installed in hobby or craft rooms.
· Furnaces installed near chemical storage areas.
· Permanent wave solutions for hair.
· Chlorinated waxes and cleaners.
· Chlorine based swimming pool chemicals.
· Water softening chemicals.
· De--icing salts or chemicals.
· Carbon tetrachloride.
· Halogen type refrigerants.
· Cleaning solvents (such as perchloroethylene).
· Printing inks, paint removers, varnishes, etc.
· Hydrochloric acid.
· Sulfuric Acid.
· Solvent cements and glues.
· Antistatic fabric softeners for clothes dryers.
· Masonry acid washing materials.
Outdoor Combustion Air Method
Aspacehavinglessthan50cubicfeetper1,000BTUHinputrating
forallgasappliancesinstalledinthespacerequiresoutdoorairfor
combustion and ventilation.
Air Openings and Connecting Ducts
1. Total input rating for all gas appliances in the space MUST be
considered when determining free area of openings.
2. Connect ducts or openings directly to the outdoors.
3. When screens are used to cover openings, the openings
MUST be no smaller than
1
/
4
² mesh.
4. The minimumdimensionof air ducts MUST NOT be less than
3² .
5. Whensizingagrille,louverorscreenusethefreeareaofopen-
ing. If free area is NOT stamped or marked on grill or louver,
assumea20%freeareaforwoodand60%formetal. Screens
shall have a mesh size not smaller than
1
/
4
².
To Next Page
Loading...
Need help?
General
