Mastic 91P Manuale Utente

L100001

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

arrow up

on the vent cap

Insure proper clearance of 1" to combustibles is main-

tained. Attach the vent cap with four wood screws

supplied.

See Figure 14.

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 stand-
offs 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-hardening mastic around
outside edge of the standoff instead of the vent cap assembly. Use
wood screws provided to attach the standoff. See Figure 15.
5. Slide the wall thimble over the vent pipe before connecting

the horizontal run to the vent cap. See Figure 16.

6. Carefully move the fireplace with vent assembly attached

toward the wall and insert the vent pipe into the horizontal
termination. The pipe overlap should be a minimum of 1

Apply silicone to the outer pipe connection. Fasten all vent
connections with screws provided.

7. Slide the wall thimble against the interior wall surface and

attach with srews. See Figure 16.

Figure 14 - Installing Horizontal Vent Cap

REAR WALL VENT INSTALLATION (continued)

Figure 15 - Installing Vinyl Siding Standoff

Apply Mastic

to All Four

Sides

Vent Cap

Wood

Screw

Cut Vinyl Siding Away to

Fit Standoff

Wood Screw

Vent Cap

Bolt

Apply Mastic to All

Four Sides

Nut

Standoff

Figure 16 - Connecting Vent Cap with Horizontal Vent Pipe

Interior Wall

Surface

Decorative

Wall Thimble

Horizontal

Vent Pipe

Screw

Vent Cap

(Horizontal

Termination)

Deflecting Shield

Do not recess vent termination into any wall.
This will cause a fire hazard.

WARNING