Indoor Coil Placement; Venting - Lennox ELO183UF68P36 Installation Instructions Manual

Indoor Coil Placement

When matching a Lennox branded A­coil to an upflow oil
furnace, make sure coil width is appropriate for full air flow
into and through the coil. If there is any doubt, it is recom­
mended that coil is installed at least four inches above the
furnace cabinet. If a non­Lennox coil is used, consult the
coil's literature for the recommended distance from the top
of the furnace cabinet. If the literature does not have a re­
commended distance, the coil should be mounted at least
eight inches above top of furnace cabinet

Venting

WARNING
Combustion air openings in front of the furnace must
be kept free of obstructions. Any obstruction will
cause improper burner operation and may result in
a fire hazard.
WARNING
The barometric draft control shall be in the same at­
mospheric pressure zone as the combustion air inlet
to the furnace. Deviation from this practice will cause
improper burner operation and may result in a fire
hazard.
CAUTION
Do not store combustible materials near the furnace
or supply air ducts. The material (such as paint, mo­
tor oil, gasoline, paint thinner, etc.) may ignite by
spontaneous combustion creating a fire hazard.
WARNING
This furnace is certified for use with type "L" vent.
"B" vent must not be used with oil furnaces.
Prior to installation of unit, make a thorough inspection of the
chimney to determine whether repairs are necessary. Make
sure the chimney is properly constructed and sized accord­
ing to the requirements of the National Fire Protection Asso­
ciation. The smallest dimensions of the chimney should be
at least equal to the diameter of the furnace vent connector.
Make sure the chimney will produce a steady draft sufficient
to remove all the products of combustion from the furnace. A
draft of at least .04" w.c. (9.9 Pa) is required during burner
operation.
1 - Local building codes may have more stringent installa­
tion requirements and should be consulted before
installation of unit.
2 - The vent connector should be as short as possible to
3 - The vent connector should not be smaller than the out­
4 - Pipe should be at least 24 gauge galvanized.
5 - Single wall vent pipe should not run outside or through
6 - Chimney should extend 3 feet (0.9 m) above highest
.
7 - The vent must not pass through a floor or ceiling.
8 - The vent may pass through a wall where provisions
9 - The vent pipe should slope upward toward the chim­
10 - Extend the vent pipe into the chimney so that it is flush
11 - The furnace shall be connected to either a factory-built
12 - When two or more appliances vent into a common
Page 8
do the job.
let diameter of the vent outlet of the furnace.
any unconditioned space.
point where the vent passes through the roof, and 2
feet (0.6 m) higher than any portion of a building within
a horizontal distance of 10 feet (3 m).
Clearances to single wall vent pipe should be no less
than 6" (152 mm); more if local codes require it.
have been made for a thimble as specified in the Stan­
dards of the National Board of Fire Underwriters. See fig­
ure 8.
Wall Thimble
Combustible
Wall
Figure 8
ney on horizontal run at least 1/4 inch (6 mm) to the
foot (0.3 m) and should be supported by something
other than the furnace, such as isolation hangers.
with the inside of the chimney liner. Seal the joint be­
tween the pipe and the liner.
chimney or vent which complies with a recognized
standard, or to a masonry or concrete chimney which
has been lined with a material acceptable to the au­
thority having jurisdiction.
vent, the area of the common vent should not be less
than the area of the largest vent or vent connection
plus 50% of the area of the additional vent or vent con­
nection. Chimney must be able to sufficiently vent all
appliances operating at the same time.
Thimble
Vent Pipe