Vermont Castings BHDR36 RN Installation Instructions & Homeowner's Manual page 14

STEP 2
Fig. 25. Measure wall thickness and cut adjustable zero
clearance sleeve parts to proper length (MAXIMUM 12").
Adjust sleeve to minimum (9-3/8" x 9-3/8") and attach to
firestop with #8 sheet metal screws (supplied). Install
STEP 2
firestop assembly.
Zero clearance sleeve is only required for
combustible walls.
Maximum Length
12" (294mm)
#8
SCREWS(2)
ADJUSTABLE ZERO
Fig. 25
CLEARANCE SLEEVE
FIRESTOP
STEP 3
(Fig.26) Apply a bead of high temperature sealant to the
inner and outer flue collars of the fireplace and using
appropriate venting component(s) attach to fireplace with
three (3) screws. Follow with the installation of the inner
and outer elbow. Again secure joints with three (3) sheet
metal screws. Wipe off any excess high temperature
sealant.
ENSURE PIPES
ARE CONCENTRIC
STEP 4
(Fig. 27) Measure the horizontal length requirement
including a 2" overlap, i.e. from the elbow to the outside
wall finish plus 2" (or the distance required if installing a
second 90º elbow).
Always
install
horizontal
venting
on a
level
plane.
#8
SCREWS(2)
ADJUSTABLE
ZERO CLEARANCE
SLEEVE
#8
SCREWS(2)
FIRESTOP
X
Fig. 26
7DVRT90
BEAD OF
SEALANT
X
Fig. 27
STEP 5
(Fig. 28) Use the appropriate length
of pipe section – telescopic or fixed
– and install. The 20" section of
pipe which goes through the wall is
packaged with the 7DVSK kit, and
can be cut to suit if necessary.
Sealing vent pipe and
firestop gaps
temperature sealant will
restrict cold air being
drawn in around fireplace.
STEP 6


(Fig. 29) Apply high temperature sealant to 4" and 7"
collars one inch away from crimped end. Guide the vent
terminations 4" and 7" collars into their respective vent
pipes. Double check that the vent pipes overlap the collars

 
by 2". Secure the termination to the wall with screws
provided and caulk around the wall plate to weatherproof.




STEP 7
Support the horizontal pipes every three (3) feet (92 cm)
with metal pipe straps. Make sure that the horizontal vent
pipe is installed on a level horizontal plane.
STEP 8
Recheck the fireplace to make sure that it is levelled,
properly positioned, and nailed or screwed to the floor.
If applied, the fireplaces adjustable frame drywall strips
(nailing flanges) should be fastened. See "Framing &
Finishing" section, page 6.
- 14 -
Fig. 28
with high


  

X
Fig. 29




X
X