Lennox Hearth MERIT PLUS MP-36OD - Manual (Page 11)

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. 11
Note: Install the hearth extension only as il-
lustrated (see Figures 21 & 22).
The safety strips should extend from front of
the fi replace at least 1 1/2" and should extend
to be at least fl ush with the sides. In the event a
wooden support is used to elevate the fi replace
above the fl oor, a “Z” type safety strip should be
fabricated and used to protect the front surface
of the wood support as well as the fl oor beneath
the hearth extension (Figures 23 & 24). The
safety strips should be tacked down to prevent
possible movement.
Note: The “Z” type safety strip is not sup-
plied.
Note: Safety strips are not required when fi re-
place rests on a noncombustible surface.
Step 3. Refer to fi replace drawings and speci-
fi cations (see Figures 18, 19 & 20) for fram-
ing dimensions and details. Frame appliance
enclosure as illustrated in Figure 18.
Note: The framed depth, 20 5/8" (524 mm)
from a framed wall, must always be measured
from a fi nished surface. If a wall covering such
as drywall is to be attached to the rear wall,
then the 20 5/8" (524 mm) must be measured
from the drywall surface. It is important that
this dimension be exact.
If the appliance is to be elevated above fl oor
level, a solid continuous platform must be
constructed.
The header may rest on the top metal spacers,
but must not be notched to fi t around them.
Consult all local codes.
Metal Safety Strips 1 ¹⁄₂"
Blocking
Metal Safety Strips
Figure 23
Figure 24
WARNING
Under no circumstances can the
fi replace top spacers (see Figure
18) be removed or modifi ed, nor
may you notch the header to fi t
around or be installed lower
than the spacers. The header
may be in direct contact with
the top spacers but may not be
supported by them.
AVERTISSEMENT
Sous aucune circonstance les
espaceurs du dessus du foyer
(voir le schéma 13) ne peuvent
être retirées ou modifiées,
vous ne pouvez pas entaillez le
colombage pour ajuster autour
ou être installé plus bas que les
espaceurs. Le colombage peut
être en contact direct avec les
espaceurs du dessus mais ne
peut être soutenu par eux.
Step 4. The fi replace should be secured to the
side framing members through the nailing tab at
the top and bottom on each side of the fi replace
front face. Use 8d nails(Figure 25).
Figure 25
For Canadian Installations - A Cold
Climate Kit, FTF8-CCK3-LD, must be
installed in all indoor installations.
Step 5. Attach the cold climate kit, Model FTF8-
CCK1-LD, around the chimney collar with the
screws provided (see Figure 26).
Note: CCK1-LD model requires a 6" diameter
Class 0 metallic air duct, acquired locally by
installer.
8d Nail
Nailing Tab
1/2”
Min.
Figure 26
Note: The nailing tab and the area directly
behind the nailing tab is exempt from the
clearances described on Page 5. Maintain at
least 1/2” clearance from the fi rebox wrap-
per to the framing at the closest point of
contact, directly adjacent to the fl ange.
Cold Climate Kit Installation Instructions:
1. Connect the 6" (152 mm) Class 0 metallic
air duct to the collar on the chimney collar
enclosure with the screws provided in the
hardware kit. See Figure 27.
2. Route the Class 0 metallic air duct out the
back wall or side wall, up through the ceil-
ing or fl oor joists to an outside wall. The
air duct’s inlet should be located above any
anticipated snow level.
Note: If the fi replace is installed against an
inside wall, the Class 0 metallic air duct may
be extended into a ventilated attic space at
least 18" (457 mm) above the attic fl oor.
Secure the duct hood to a vertical post with
the inlet positioned downward. Ensure that
nothing blocks the hood opening. This air
duct must never terminate higher than the
fi replace chimney.
Install As Shown With
Opening In Downward
Position Do Not Block
Entrance
5 Foot Min. Height
From Outside
Ground Level
Figure 27