Desa BDV34NA Venting Installation, Continued, Vent Pipe Connections, Vent Opening Requirements

OWNER’S MANUAL

VENTING INSTALLATION

Continued

3.Attach vent pipe assembly to the fire- place. Set fireplace in front of it’s per- manent location to insure minimum clearances. Mark the wall for a 10" square hole (for noncombustible ma- terial such as masonry block or con- crete, a 7 1/2" diameter hole is accept- able). See Figure 12. The center of the hole should line up with the center- line of the horizontal rigid vent pipe. Cut a 10"x10" (254mm x 254mm) square hole through combustible ex- terior wall (7 1/2" [190mm] diameter hole if noncombustible). Frame as necessary (see Figure 12).

	4" Clamp
Female	7" Clamp
Locking
Lugs
	Spacer
	Spring
Male	4" Flex
	Pipe
Slots
	7" Flex
	Pipe
Rigid Vent Pipe Flexible Vent Pipe

Figure 11 - Vent Pipe Connections

Vent Opening

Combustible Wall

10"

(254mm)

10"

(254mm)

(Framing

4.Apply a bead of non-hardening mastic around the outside edge of the vent cap. Position the vent cap in the center of the 7 1/2" or 10" hole on the exterior wall with the arrow on the vent cap pointing up. Insure proper clearance of 1" to combustibles is maintained. At- tach the vent cap with four wood screws supplied (see Figure 13). Note: Re- place the wood screws with appropri- ate fasteners for stucco, brick, concrete, or other types of siding.

WARNING: Do not recess vent termination in to any wall. This will cause a fire hazard.

For vinyl siding, stucco, or wood exte- rior use vinyl siding standoffs between vent cap and exterior wall. The vinyl sid- ing standoff prevents excessive heat from melting the vinyl siding material. Bolt the vent cap to the standoff. Apply non-hard- ening mastic around outside edge of the standoff instead of the vent cap assem- bly. Use wood screws provided to attach the standoff. See Figure 14.

5.Slide the wall thimble over the vent pipe before connecting the horizontal run to the vent cap (see Figure 15).

Apply Mastic to All Four Sides

UP

Wood

Screw

Vent Cap

Figure 13 - Installing Horizontal Vent Cap

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 1/4". Apply silicone to the outer pipe connection. Fasten all vent connections with screws provided. Refer to Fireplace Installation on page 16 for instructions on securing unit to framing or floor.

7.Slide the wall thimble against the inte- rior wall surface and attach with screws provided (see Figure 15).

Cut Vinyl Siding

Away to Fit

Standoff

Wood Screw

Standoff

UP

Nut

Bolt

Apply Mastic

to All Four Sides Vent Cap

Figure 14 - Installing Vinyl Siding Standoff

Interior Wall

Surface

Wall

Thimble

Vent Cap

Vent Opening

Detail)

(Horizontal Screw

Noncombustible Wall

7 1/2" (190mm)

Figure 12 - Vent Opening Requirements

Termination)	Horizontal
	Vent Pipe

Figure 15 - Connecting Vent Cap with Horizontal Vent Pipe

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