Vermont Casting H33BDVRRN - Manual (Page 14)

14
Pyromaster
©
H33BDVRRN/P
10004798
STEP 2
Measure wall thickness and cut adjustable zero clear-
ance sleeve parts to proper length (MAXIMUM 12”/305
mm). (Fig. 22) Adjust sleeve to minimum (9
³⁄₈
” x 9
³⁄₈
”)
and attach to firestop with #8 sheet metal screws
(supplied). Assemble sleeve and attach to firestop with
#8 sheet metal screws (supplied). Install firestop
assembly.
Zero clearance sleeve is only required
for combustible walls.
Adjustable Zero
Clearance Sleeve Maximum Length
12” (294mm)
#8 Screws (2)
Adjustable
Zero
Clearance
Sleeve
Firestop
#8 Screws
Zero Clearance
Sleeve Flush with
Wall Exterior
Drywall
Vent Pipe
Firestop
Wood
Framing
Wall Exterior
#8 Screws
(2)
CFM135
Fig. 22 Zero clearance sleeve and firestop.
STEP 3
Apply a bead of high temperature sealant to the inner
and outer flue collars of the fireplace and using appro-
priate venting component(s) attach to fireplace with
three (3) screws. (Fig. 23) 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.
X
7TDVRT90
Ensure
Pipes are
Concentric
Bead
of Sealant
(If necessary)
CFM143
Fig. 23 Apply bead of sealant as needed.
STEP 4
Measure the horizontal length requirement including a
2” (50 mm) overlap, i.e. from the elbow to the outside
wall finish plus 2” (or the distance required if installing
a second 90
°
elbow. (Fig. 24)
Always install horizontal venting on a
level plane.
X
CFM136
Fig. 24 Measure horizontal length requirement plus 2”.
STEP 5
Use appropriate length of pipe section - telescopic or
fixed - and install the horizontal vent sections. The 20”
(508 mm) section of pipe which goes through the wall
is packaged with the 7DVSK starter kit, and can be cut
to suit if necessary. (Fig. 25)
Sealing vent pipe and firestop gaps with
high temperature sealant will restrict
cold air being drawn in around fireplace.
X
High Temperature
Sealant
CFM137
Fig. 25 Install horizontal vent sections.