8
A vent cover assembly has been supplied with the unit.
and can be found secured to the gas controls within the
control area of this unit. The vent cover assembly must
be installed to assure proper operation of the unit.
The following list summarizes the requirements for the
location of the vent system termination:
• The location of the vent termination must be consistent
with the National Fuel Gas Code (ANSI Z223.1) or CAN/
CGA-B149 Installation Codes.
• The vent termination must be located at least 4 feet
horizontally from any electric meters, gas meters,
regulators, and relief equipment.
• The vent termination must be located at least 3 feet
above any forced air inlet located within 10 feet.
• The vent termination must be located at least 4 feet
below, 4 feet horizontally from, or 1 foot above any door,
window, or gravity air inlet into any building.
• The vent termination must be located at least 1 foot
above grade.
• The unit should be installed in a way that prevents any
obstruction of the vent termination during accumulating
snow.
• The unit installation shall avoid areas where condensate
drainage may cause problems by dropping on planters
or patios, etc. Also verify exhaust gases will not
impinge on windows or building surfaces, which may
be compromised or damaged by condensation.
• Do not install the unit such that exhaust from the vent
termination is directed into window wells, stairwells,
under decks, or in alcoves or similarly recessed areas.
The vent termination must not be located above any
public walkways.
Figure 3 shows the proper installation of the vent cover
assembly over the vent outlet on the exterior of the
corner panel. The fasteners used to secure the vent cover
assembly have been included in the owner’s package.
• The requirements in Canada (B149.1) are structured
differently. Consult with B149.1 and local code offi cials
for Canadian installations.
Air openings in the door of the unit, warm air registers, and
return air grilles must never be restricted. If the unit does
not receive an adequate supply of air for combustion, the
fl ame roll-out control located above the burners will open,
turning off the gas supply to the burners. This safety device
is a manually reset switch. IMPORTANT NOTE: DO NOT
install jumper wires across this control to defeat its
function or reset the control without identifying and
correcting the fault condition.
If this control must be replaced, use only factory authorized
replacement parts. See the Replacement Parts List on
page 23.
WARNING:
Combustible air must not be drawn from a
contaminated atmosphere. Excessive exposure
to contaminated combustion air will result in
safety and performance related problems.
To maximize heat exchanger life, the combustion air
must be free of chemicals that can form corrosive acidic
compounds in the combustion gases. The recommended
source of combustion air is to use clean air from outside.
DO NOT place any chemicals with fl ammable or caustic
vapors or these other corrosive chemicals near the
vent termination:
• Gasoline/Kerosene
• Permanent wave solutions
• Chlorinated waxes and cleaners
• Chlorine based swimming pool chemicals
• Water softening chemicals
• De-icing salts or chemicals
• Carbon tetrachloride
• Halogen type refrigerants
• Cleaning solvents
• Cements, glues, paint removers, varnishes, etc.
• Hydrochloric acid
• Masonry acid washing materials
• Plumbing Stack
Figure 3. Vent Assembly
Venting Requirements
This unit has been equipped with an integral venting
system and designed to operate only with this venting
system. No additional venting shall be used. This unit
must be vented to the outdoors.
WARNING:
This unit is intended for outdoor installation
only. Do not vent the unit through a conventional
venting system.
