Lennox Hearth WHITFIELD 30 FS-2 - Manual (Page 11)

11
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE
Size of Pipe
These pellet appliances are approved for use
with the following vent sizes: 3” (75 mm)
standard, or 4” (100 mm), see Page 13 - for
determining correct size vent). When 4” pipe
is used: for horizontal vent installations use a
3” (75 mm) to 4” (100 mm) adapter - available
from vent manufacturer. For vertical installa-
tions use a 3” (75 mm) to 4” (100 mm) “tee”
- available from vent manufacturer.
Offsets
In every installation, a single or double clean-out
“tee” is recommended for every ninety-degree
offset (this tee will help collect ash residue and
will allow for routine cleaning without the need
to disconnect sections of pipe).
Note: Offsets and horizontal runs accumulate
fl y ash and soot which reduces the exhaust fl ow
and performance of the stove.
• Total Offsets in venting system should not
exceed 270° total in direction change.
• Horizontal Runs - The maximum total
horizontal run must not exceed 10 feet
(3.1 meters).
• Horizontal run of pipe requires 1/4” (7 mm)
rise per foot.
Pipe Clearances / Requirements
See pipe manufacturers instructions for instal-
lation of venting components and clearances.
Follow pipe manufacturers installation precau-
tions for passing pipe through a combustible
wall or ceiling (i.e. use an approved thimble).
Note: Pellet vent pipe requires 3” (75 mm)
clearance from outside of pipe unless otherwise
specifi ed by vent manufacturer - all diameters:
3” (75 mm) and 4” (100 mm). A support bracket
must be installed every 4 feet (1.2 m) of pellet
vent pipe on the exterior wall of the house unless
otherwise specifi ed by vent manufacturer.
Pipe / Liner Joint Requirements
All pipe joints must be secured with a minimum
of 3 screws. ALL horizontal joints must be
sealed gas-tight (air tight, sealed connection).
Use RTV high temperature silicone or Interam
to provide a complete seal at the fl ue collar
and on all joints.
Connection to Masonry Chimney through a
Wall (Free-Standing Models)
Be sure to verify the construction of a masonry
chimney, as it may have combustible fram-
ing.
Approved liner when relining Masonry or Fac-
tory Built Fireplaces is 2100HT (degree F.) liner
listed to UL 1777 or ULC S635.
Connection to an Existing Class A Chimney
(Free-Standing Models)
A chimney adapter can be used to make the
connection from 3” (75 mm) or 4” (100 mm)
pellet vent pipe (listed to UL 641 or ULC S609)
to existing UL chimney system. Verify with the
pipe manufacturer that your pipe brands will
interconnect.
Horizontal Vent Installations
On all horizontal vent installations (short,
horizontal runs with no vertical pipe); care
should be taken when choosing a location for
terminating the vent. It is not recommended
to directly vent the exhaust on the prevailing
wind side of the house. It is recommended that
when an appliance is vented directly through
a wall, a minimum of 8 feet (2.5 m) of vertical
pipe should be installed to create some natural
draft. This will reduce the possibility of smoke
or odor entering the dwelling during appliance
shutdown or loss of power.
Vent Termination
Do not terminate vent in an enclosed or
semienclosed area such as: carports, garage,
attic, crawl space, under a deck, porch, narrow
walkway, closely fenced area, or any location
that can build up a concentration of fumes such
as a stairwell, covered breezeway etc.
Vent surfaces can get hot enough to cause
burns if touched. Adults should supervise
children when they are in the area of a hot
stove. Non-combustible shielding or guards
may be required.
Termination Cap: The termination of the outside
chimney of the pellet stove shall be located in
accordance with the following:
A. Higher than 3 feet (.92 meters) above any
forced air inlet (air conditioner, etc.) located
within 10 feet (3 meters).
B. Not less than 4 feet (1.2 meters) below, 4
feet (1.2 meters) horizontally from or 1 foot
(3.1 meters) above any gravity air inlet (door,
window, etc.) which fl ue gases could reenter
the dwelling.
C. Not less than 2 feet (.6 meters) from combus-
tible materials such as an adjacent buildings,
fences, protruding parts of the structure,
roof overhang, plants and shrubs, etc. and
not less than 7 feet (2.1 meters) above
grade when located adjacent to the public
sidewalks (access). The fi nal termination of
the exhaust system must be confi gured so
that fl ue gases do not jeopardize the safety
of people passing by, overheat combustible
portions of nearby structures or enter the
dwelling.
D. Not less than 3 feet (.92 meters) below an
eave (maximum overhang of 3 feet (.92
meters) or any construction that projects
more than 2 inches (51 mm) from the plane
of the wall.
E. The distance from the bottom of termination
to grade is 12 inches (305 mm) minimum.
This is conditional upon plants and nature
of grade surface: Be careful to choose a
location for the vent termination which
does not expose people or shrubs to high
heat from the exhaust gases. The exhaust
gases are not hot enough to ignite grass,
plants and shrubs located in the vicinity of
the termination although they should be a
minimum of 3 feet (.92 meters) away. The
grade surface under the termination must
not be a lawn.
F. Since sparks may escape from the exhaust
pipe of any stove, use caution when
positioning the vent pipe. Refer to pipe
manufacturer’s instructions when installing
and terminating the exhaust. The vent pipe
should be horizontal and never run the pipe
in a downward direction (recommend a 1/4
inch [7 mm] rise per foot horizontal).
Notes:
• It is not recommended to terminate exhaust
vent on the prevailing wind side of the
house.
• It is not recommended using a termination
cap with a screen (fl y ash can collect in a
screen resulting in blockage).