Lennox Hearth MERIT PLUS MP-36OD User Manual

Page 14

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Next, slide roof fl ashing over extended chimney
section that previously has been installed above
the roof opening in Step 4. FTF8 fl ashings
require fl ashing spacers. Slide fl ashing all the
way down until the fl ashing base rests fl at on
the roof (Figure 38). Again, check the vertical
position of the chimney and the 1"* minimum
air space to combustibles.

Step 9. Security Chimneys locking bands, Model
FLB, may be required if the chimney extends
too high above the roof fl ashing. As a general
rule, if the chimney extends more than 6' above
the roof fl ashing, the use of locking bands is
advisable to strengthen the chimney assembly.
Align the locking band at the chimney joint.
Locking bands wrap around pipe joints equally
covering the joints of both pipe sections. Use
the nut provided and TIGHTEN snugly. Do not
overtighten as this might damage the chimney
section (refer to Figure 40).

Note: If chimney extends more than 8' above
roof surface, guy wires are also recommended.
Use three (3) guy wires, attach to locking
band assembly, extend and secure to roof in a
triangular pattern (see Figure 41). Guy wires
are not supplied by the manufacturer.

Step 8. The standard Security FTF8 roof fl ash-
ing assemblies include a storm collar. Slide
the storm collar over outer chimney, rest on
fl ashing spacers and align with top surface of
fl ashing. Insert tab in slot, pull tight and bend
tab back over slot. Seal storm collar to outer
chimney with roof caulking or mastic around
entire circumference of pipe. Also add extra roof
caulking to the tab/slot area to seal completely
against water penetration (Figure 40). Check all
joints very carefully to ensure no water intrusion
can take place.

Note: Do not apply excessive pressure to any
subsequent chimney sections following the
stabilizer when installing. Ensure each subse-
quent chimney section is securely attached by
testing as noted in Step 4.

Step 6. Select the proper Security Chimneys
roof fl ashing based on pitch of roof. Use chart
below for selection:

Figure 37

Note: Do not caulk or seal the ventilating open-
ings or seal the fl ashing at the chimney.

Step 7. Secure fl ashing by nailing along the
perimeter into roof using 8d nails. If shingled
roof, slide upper end and sides of roof fl ash-
ing under shingles (trim if necessary), seal the
top and both sides of the fl ashing to the roof
with roof caulking. Cover nail heads with roof
caulking (Figure 39).

*Note: 2" clearance to combustibles required
in Canada.

FTF8-S4 Stabilizer

FTF8 Chimney

FTF8 Flashing

Flashing Spacers

Do Not Seal

Locking Band

Mastic

Figure 38

Figure 39

Figure 40

Roof Pitch

Model

Flat to 6/12

F8F6

6/12 to 12/12

F8F12

Roof Ridge

120

Figure 41

Step 10. Using a FTF8-CTD or FTF8-CTDT
Round Termination:
1. Hold the FTF8-CTD (or CTDP) over top of
last chimney section (Figure 42).
2. Center inner slip section in inner fl ue pipe-
slip down.

CTD

Termination

Chimney

Figure 42

3. Center outer locking section over outer fl ue
pipe. Push down until locking tabs are fi rmly
engaged.
4. Pull up slightly on CTD to ensure locking
joint has fi rmly engaged.

Using a FTF8-CTD, FTF8-CTDT (or CTDTM)
Chase Termination:
Refer to specific installation instructions
(750,014M) included with the FTF8-CTDT (or
750,205M for FTF8-CTDTM) chase termination
for clearance and installation details.

Using a FTF8-CT1 or FTF8-CT1P Chase
Termination:
Refer to specific installation instructions
(750,015M) included with FTF8-CT1 chase
terminations for clearance and installation
details.

Using a FTF8-CT2 Chase Termination:
Refer to specific installation instructions
(750,016M) included with FTF8-CT2 chase
terminations for clearance and installation
details.

Using a FTF8-CTT Chase Termination:
Refer to specific installation instructions
(750,077M) included with FTF8-CTT chase
terminations for clearance and installation
details.

FTF8-CTD or
FTF8-CTDT
Termination