Monessen Hearth HDV500NV/PV Flat ceiling installation, Installation for vertical termina- tion

venting installation HDV Series Direct Vent Gas Fireplace

•The maximum angular variation allowed in the system is 270°. Figure 31

•The minimum height of the vent above the highest point of penetration through the roof is 1' (305 mm).

Roof Flashing

1

2

3

4

Example: Elbow 1 = 90°

Elbow 2 = 45°

Elbow 3 = 45°

Elbow 4 = 90°

Total Angular = 270° Variation

Wall Strap

1

2

FP1669

Figure 32 -

45° Elbows

Ceiling Firstop

Figure 31 -

Maximum Elbow Usage

3

4

FP1179

Offset with Wall Strap and 45° Elbows

Flat ceiling installation

1. Cut a 10Z\x" (267mm) square hole in the ceiling using

the locating hole as a center point The opening should

be framed to 10Z\x" x 10Z\x" (267 x 267 mm) inside

dimensions as shown in Figure 34 using framing

lumber the same size as the ceiling joist. If the area

above the ceiling is an insulated ceiling or a room, nail

firestop from the top side. This prevents loose insula-

installation for vertical termina- tion

1.Determine the route your vertical venting will take. If ceiling joist, roof rafters or other framing will obstruct the venting system, consider an offset. Refer to Figure 32 to avoid cutting load bearing members.

NOTE: Pay special attention to these installation instructions for required clearances (air space) to combustibles when passing through ceilings, walls, roofs, enclosures, attic rafters, etc. Do not pack air spaces with insulation. Also note maximum vertical rise of the venting system and any maximum horizontal offset limitations. Offsets must fall within the parameters shown in Page 16, Figure 13.

2.Set fireplace in desired location. Drop a line plumb down from the ceiling to the position of the flue exit. Mark the center point where the vent will penetrate the ceiling. Drill a small locating hole a this point.

Drop a plumb line from the inside of the roof to the ceil- ing locating hole in the ceiling. Mark the center point where the vent will penetrate the roof. Drill a small locating hole at this point.

tion from falling into the required clearance space.

Figure 33. Otherwise, install firestop below the framed

hole. The firestop should be installed with no less than

three nails per side. Figure 33

2. Assemble the desired lengths of pipe and elbows nec-

essary to reach from the burner system flue up through

the firestop. Be sure pipe and elbow connections are

fully twist-locked. Page 17, Figure 15

3. Cut a hole in the roof using the locating hole as a

center point. (Cover any exposed open vent pipes

before cutting hole in roof). The 10Z\x" x 10Z\x" (26 x

267 mm) hole must be measured on the horizontal.

Actual length may be larger depending on the pitch of

the roof. There must be a 1" minimum clearance from

the vent pipe to combustible materials. (Insulation

should be considered a combustible material) Frame

the opening as shown on Page 17, Figure 16

4. Connect a section of pipe and extend up through the

hole.

56D3048 23