Venting installation – Monessen Hearth Direct Vent Gas Fireplace HBDV300 User Manual
Page 18
18
54D5031
9
1
/
2
"
(241mm)
9
1
/
2
"
(241mm)
3
3
/
4
"
(92mm)
7
1
/
2
"
(190mm)
Maximum
20"
Top View Flat Installation
REAR (THROUGH THE WALL) APPLICATIONS
When installed as a rear vent unit this appliance may be vented directly to a termination located on the rear wall behind
the appliance
• The maximum horizontal distance between the rear of the appliance and the outside of termination is 20" (508 m). See
Figure 15.
• Only one 45° elbow is allowed in these installations.
VENTING INSTALLATION
Sealant is not required to assemble HBDV/DVBH
fireplace venting. Do not use silicone sealant at
the flue exhaust connections.
1. Find the pipe section’s direction label. The
label arrow shall be pointed away from the fire-
box and toward the termination. Firmly insert
the initial rigid section/elbow into the firebox
outer collar. Simpson “GS” and Selkirk “DT”
outer walls are hemmed and will snap into the
collar’s tabs. Attach Simpson’s DirectVent Pro
by fully inserting into the collar and securing
with self tapping screws. The screws shall only
penetrate the flue outer wall.
Refer to vent manufacturer’s installation
instructions to properly assemble flue.
2. Locate and cut the vent opening in the
wall. For combustible walls first frame in
opening.
Combustible Interior Walls:
Cut a 11
1
/
2
"H
x 9
1
/
2
" W hole through the interior wall.
Combustible Exterior Walls:
Cut a 9
1
/
2
"H
x 9
1
/
2
"W square hole through the exterior
wall frame. See Figure 17.
Noncombustible Walls:
Hole opening
should be 7
1
/
2
" (190mm) in diameter.
3. The center of the hole should line up with the
center line of the horizontal rigid vent pipe
end. Pipe shall always run level or uphill on
horizontal runs. Never run pipe down hill. See
Figure 17.
Figure 15 - Rear Vent Application,
Maximum Horizontal Distance
Figure 17 - Exterior Wall Framing Dimensions
Note: Horizontal runs of vent
must be supported every three
feet (914mm). Use wall straps
for this purpose.
Figure 16 - Rigid Vent Pipe Connections
Female
Locking Lugs
Male Slots