Installation Manual
8
Upf low 0" 0" 3" C 0" 1"
Horizontal 6" 0" 3" C 0" 6"
C = If placed on combustible floor, floor MUST be wood only.
Counterflow 0" 0" 3" NC 0" 1"
Horizontal 6" 0" 3" C 0" 6"
C = If placed on combustible floor, floor MUST be wood only.
must be used for installations on combustible flooring.
TOP
BOTTOM
SIDE SIDE SIDE
TOP
BOTTOM
Upflow Counterflow Horizontal
required.
necessitate greater clearances than the minimum
clearances listed above.
• Clearance in accordance with local installation
codes, the requirements of the gas supplier and
the manufacturer’s installation instructions.
locaux, aux exigences du fournisseur de gaz et
aux instructions d’installation du fabricant.
• In all cases, accessibility clearance must take
precedence over clearances from the enclosure
where accessibility clearances are greater.
Installations must adhere to the clearances to combustible
The minimum clearance information for this furnace is
provided on the unit’s clearance label. These clearances
must be permanently maintained. Clearances must also
accommodate an installation’s gas, electrical, and drain trap
and drain line connections. If the alternate combustion air
-
ance must be provided to accommodate these connections.
Refer to Vent/Flue Pipe and Combustion Air Pipe for details.
In addition to the required clearances to combustible
materials, a minimum of 24 inches service clearance must be
available in front of the unit.
free area of 0.25 square inches per 1,000 BTU/hr of furnace
model for minimum clearances to combustible surfaces. One
of the ventilation openings must be within 12 inches of the top;
the other opening must be within 12 inches of the bottom of
between the door and door frame is usually adequate to satisfy
this ventilation requirement.
system serving other appliances,the venting system may
be too large to properly vent the remaining attached ap-
pliances.
The following vent testing procedure is repro duced from
the
under cabinets.
• Hot or cold air from registers.
• Radiant heat from the sun.
• Concealed hot or cold water pipes, or chimneys.
• Unconditioned areas behind the thermostat, such as
an outside wall. Consult the instructions packaged
with the thermostat for mounting instructions and
further precautions.
Combustion & Ventilation RequiRements
Improved construction and additional insulation in buildings
around doors and windows. These changes have helped in
reducing heating/cooling costs but have created a problem
fuel burning appliances. Appliances that pull air out of the
the problem by starving appliances for air.