Lennox Hearth OASIS SERIES LSO-43 User Manual

Page 10

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

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 (Figure 29 ). Guy wires are
not supplied by the manufacturer.

Step 7. The standard Security FTF10 roof flash-
ing assemblies include a storm collar. Slide the
storm collar over outer chimney, rest on flash-
ing spacers and align with top surface of flash-
ing. Insert tab in slot, pull tight and bend tab
back over slot. Seal storm collar to outer chim-
ney 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 28 ). Check all

joints very carefully to ensure no water intru-
sion can take place.

Figure 29

Figure 27

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 3.

Step 5. Select the proper Security Chimneys
roof flashing based on pitch of roof. Use chart
below for selection:

Roof Pitch

Model

Flat to 6/12

F10F6

6/12 to 12/12

F10F12

Next, slide roof flashing over extended chimney
section that previously has been installed above
the roof opening in Step 3. FTF10 flashings
require flashing spacers. Slide flashing all the
way down until the flashing base rests flat on
the roof (

Figure 26 ). Again, check the vertical

position of the chimney and the 2" minimum air
space to combustibles.

Figure 26

Note: Do not caulk or seal the flashing at the
chimney.

Step 6. Secure flashing by nailing along the
perimeter into roof using 8d nails. If shingled
roof, slide upper end and sides of roof flash-
ing under shingles (trim if necessary), seal
the top and both sides of the flashing to the
roof with roof caulking. Cover nail heads with
roof caulking (

Figure 27 ).

FTF10 Chimney

FTF10 Flashing

Do Not Seal

Locking Band

Mastic

Storm Collar

Roof Ridge

120

Step 9. Using a FTF10-CT1 Chase Termination:

Refer to specific installation instructions in-
cluded with FTF10-CT1 (

Figure 30 ) chase ter-

minations for clearance and installation details.

Studs

3 Foot Min.

Above

Roof

Maintain 2" (51mm)

Air Space to

Combustibles

CT1

Termination

Figure 28

Step 8. Security Chimneys locking bands,
Model FLB, may be required if the chimney
extends too high above the roof flashing. As a
general rule, if the chimney extends more than
6' above the roof flashing, the use of locking
bands is advisable to strengthen the chimney
assembly. Align the locking band at the chim-
ney 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 dam-
age the chimney section (

refer to Figure 25 ).

Figure 30

Using a FTF10-CT2 Chase Termination:

Refer to specific installation instructions in-
cluded with FTF10-CT2 chase terminations for
clearance and installation details.

Using a FTF10-CTDT Chase Termination:

Refer to specific installation instructions in-
cluded with the FTF10-CTDT chase termina-
tion for clearance and installation details.