22
b. Measure dimension “L” from exterior wall outer
surface to the end of the last tting (or end of
installed Boiler Concentric Vent Collar). See
Figure 14 ‘Dimension “L”’.
several marks around the outer pipe to establish a
cut line. See Figure 15 ‘ Cutting Outer Pipe’.
d. Carefully cut the outer pipe at the marked line
using aviation shears, a hacksaw etc. Ensure the
pipe is cut square and cut end is deburred.
Figure 13: Horizontal (Wall) Terminal installation
Figure 14: Dimension “L”
Figure 15: Cutting Outer Pipe
c. When factory supplied Horizontal (Wall)
Terminal needs to be shortened, measure
dimension “L” plus 1-¼” from inside of the
attached Outside Wall Plate and mark the
Horizontal (Wall) Terminal outer pipe. To
achieve a square cut of the outer pipe, place
e. Mark the end of the Horizontal (Wall) Terminal
inner polypropylene vent pipe to extend ¾” past
the cut end of the outer pipe. To achieve a square
cut of the inner pipe, place several marks around
the inner pipe to establish a cut line.
f. Cut off the marked end of inner polypropylene
vent pipe with a ne tooth blade hacksaw etc.
and deburr. See Figure 16 “Cutting Inner Pipe.
g. Place a mark around the outer pipe, 1” from cut
edge, towards the attached Outside Wall Plate, to
establish visual insertion line as shown in Figure
16 “Cutting Inner Pipe”.
h. Pass the shortened Horizontal Concentric Vent
from outside, thru earlier cut exterior wall
opening and push in until the attached Outside
Wall Plate is tight against exterior wall surface.
Insure the proper position of the Horizontal
Concentric Vent before securing the Outside Wall
Plate to the wall with provided fasteners. Seal
plate edges with exterior grade sealant to prevent
moisture penetration.
Figure 16: Cutting inner Pipe