Lennox Hearth CAMBRIA 850 - Manual (Page 18)

Figure 31
Flashing
Attic
Radiation
Shield
Firestop
Universal
Support
AC Starter
Section
AC10SB or
AC10SB30
Note: Outside air kits must be
installed for both fireplace and AC
chimney.
Outside
Combustion
Air Kit
From below, install a firestop in each ceiling/
floor separation through which the chimney
will pass. At the attic level, install an attic
radiation shield from above (see Figures
30a and 30b).
2. For Secure Temp ASHT+ / Nova Temp HT6103+
chimneys, place the first chimney length on
the fireplace. To lock it in place, turn 1/4 of
a turn clockwise. With the AC chimney, you
must use a starter section before installing
the first chimney length (Figure 31). Con-
tinue installing chimney lengths making sure
to lock each length in place.
3. Every time the chimney passes through a ceil-
ing or a wall, install the appropriate firestop.
When you reach the desired height, install the
roof support (refer to instructions included
with the support). For an AC chimney use
an universal support AC10SU (H3265).
4. Put the roof flashing in place and seal the
joint between the roof and the flashing with
roofing pitch (see Figures 32 and 33). For
sloping roofs, place the flashing under the
upper shingles and on top of the lower
shingles. Nail the flashing to the roof, using
roofing nails.
5. Place the storm collar over the flashing, and
tighten it with the bolt supplied. Finally, seal
the joint between the storm collar and the
chimney, using silicone caulking.
6. Install the chimney cap. Once the chimney
cap is in place, the roof flashing can be
washed with a solvent or vinegar and then
painted with rust-proof paint.
Figure 30a
ASHT / S2100
HT6103+ / HT6000+
Chimney
AC
Chimney
Figure 30b
Attic Radiation Shield
ACBI7RSA
AC10RS
Radiation Shield
Firestop
CHIMNEY INSTALLATION
MODEL AC
Rain Cap
Collar
Chimney Outside
Air Intake
(required when
using AC chimney)
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
18