17
Alpine TR42 Direct Vent Gas Fireplace
VENTING
VENTING – HORIZONTAL
Install the vent system according to the instructions
included in the venting kit received with the fireplace.
1. With the unit in the desired location, check to determine
if wall studs or roof rafters will obstruct the venting system
when attached. If this is the case, you may want to adjust
the location of the unit or consult with your framing
contractor for options in adjusting the framing.
2. Determine where the horizontal vent pipe will exit
through the exterior wall. Frame a 10” x 10” opening at the
exit location and mount the horizontal firestop. This
firestop will assure that all clearances to the vent pipe are
maintained . (See fig. 10)
3. To properly assemble the Simpson Vent pipe a high
heat sealant , such as Mil-Pac or Dap High Heat Mortar,
should be used to ensure an airtight vent. Apply the sealant
to the inner collar of the pipe, line up the lugs on the out-
side of the pipe, slip the pipe together and then twist the
pipe to lock the lugs together (see fig 11). Wrap the outer
seam of the vent pipe with aluminum tape or seal with sili-
con.
Fig. 11 – Applying Sealant
NOTE: Clearances to combustibles from the vent pipe
must be adhered to. See the table below for proper
clearances.
Horizontal Venting Clearances
TOP OF PIPE
2” to combustibles
SIDES OF PIPE
1” to combustibles
BOTTOM OF PIPE
1/2” to combustibles
4. Install the vertical pipe needed, followed by the elbow to
achieve the pre-determined exit height and then extend the
horizontal section of vent through the pre-mounted
horizontal firestop. The pipe extending through the
exterior wall should not extend beyond the surface, which
the termination cap will be mounted to, more than 1” but
needs to be at least flush with this surface ( see fig. 12).
5. Carefully slide the vent termination over the vent pipe
from the outside and flush it up against the exterior wall.
Level the termination cap for appearance sake, making sure
the arrow is pointing upward on the termination cap (see
fig. 13). Carefully fasten the termination cap to the exterior
wall (see fig. 14) using the screws provided in the
termination box. You may seal around the termination cap
with a quality silicone for insulation purposes.
NOTE: All pipe joints must be sealed with Mill-pac or
Dap High Heat Mortar on the inner pipe and aluminum
tape or Silicone on the outer joint.
Mill-pac
Sealant
Silicone Sealant
Fig. 10 – Horizontal Firestop
