Monessen Hearth 624DV(ST Installation And Operating Instructions Manual page 18

Designer Series Gas Fireplaces
REaR waLL vENT INSTaLLaTIoN
4. Apply a bead of non-hardening mastic around the outside
edge of vent cap. Position the vent cap in the center of
hole on the exterior wall with the word "UP" on the vent cap
facing up. Insure proper clearance of 1" to combustibles
is maintained. Attach the vent cap with four wood screws
supplied. Figure 19
NoTE: Replace the wood screws with appropriate fasteners
for stucco, brick, concrete, or other types of siding.
For vinyl siding, stucco, or wood exterior use vinyl siding
standoffs between vent cap and exterior wall. The vinyl siding
standoff prevents excessive heat from melting the vinyl siding
material. Bolt the vent cap to the standoff. Apply non-harden-
ing mastic around outside edge of the standoff instead of the
vent cap assembly. Use wood screws provided to attach the
standoff. Figure 20
5. Slide fire stop over the vent pipe before connecting hori-
zontal run to vent cap. Figure 21
6. Insert vent pipe into the horizontal termination. The pipe
overlap should be a minimum of 1Z\v". Fasten all vent con-
nections with screws provided.
7. Slide fire stop against the interior wall surface and
attach with screws. Figure 21
Apply
Mastic to All
Four Sides
FP1956
Figure 20 -
Installing Vinyl Siding Standoff
FP1956
vinyl siding standoff
18
(continued)
Cut Vinyl Siding Away
to Fit Standoff
Standoff
T
H O
Nut
Wood Screw
FP1955
Apply Mastic to
All Four Sides
Figure 19 -
Installing Horizontal Vent Cap
do not recess vent termination into any wall.
This will cause a fire hazard.
Deflecting
Shield
Vent Cap
Vent Cap
(Horizontal
Termination)
Bolt
FP1957
Figure 21 -
Connecting Vent Cap with Horizontal Vent Pipe
vENTING INSTaLLaTIoN
T
H O
FP1955
horizontal vent cap
Interior Wall
Surface
Screw
FP1957
install firestop
Deflecting
Shield
Vent Cap
Wood Screw
Horizontal
Vent Pipe
42D0200