Burnham Apex APX399 User Manual

38
IV. Venting E. Concentric Polypropylene Venting (continued)
• Install the roof ashing using standard
practice on the roong system of the
structure.
• If not already done, assemble the venting
system inside the building. The last
section of pipe needs to be on the same
center line as the terminal and within
19-1/4” of the top edge of the roof
ashing.
• Measure distance “H” from the top edge
of the storm collar to the end of the last
tting as shown in Figure 28.
• Add 1” to distance “H”. Carefully mark
this length on the pipe as shown in Figure
29.
• Cut the outer pipe only at the point
marked in Step (e) using aviation shears,
a hacksaw, or an abrasive wheel cutter.
Be careful to cut the pipe square. De-burr
the cut end with a le or emery cloth.
• Place a mark on the plastic inner pipe
3/8” beyond the end of the outer pipe
(Figure 29). Use a ne tooth hacksaw to
cut the plastic pipe and be careful to cut
the pipe square. De-burr the cut edge of
the plastic pipe with a le or emery cloth.
• Make a mark on the terminal section
1” from the cut end of the outer pipe as
shown in Figure 29.
Figure 29: Cutting Vertical Terminal
Figure 30: Completing Vertical Terminal Installation
• Slip the terminal section through the
roof from the outside. Push into the last
section of vent pipe until the mark made
in Step (h) is not longer visible. Secure
the terminal to the last piece of pipe with
three #10 x 1/2” sheet metal screws.
Drill a 1/8” hole through both outer pipes
to start these screws. Use a drill stop or
other means to ensure that the drill
bit does not penetrate more than 3/8”
into the outer pipe. Do not use a sheet
metal screw longer than 1/2”.
• Secure the terminal section to the inside
of the roof structure using the mounting
bracket provided with the terminal
(Figure 30).
b. Optional Concentric Chimney Chase Installation
Refer to Figure 31.
i. A vertical concentric vent system can be
installed in an UNUSED masonry chimney.
• The Chimney chase Support Elbow
with attached Mounting Bracket is used
at the base of the chimney. Refer to
Table 12 ‘Concentric Vent Components’
for details. Slip the elbow over the
M10 x 35 screw in the support bracket.
Determine the desired vertical location
of the support elbow in the chimney and
mark the location of the pin, positioned
on the back of the support bracket,
onto the chimney rear wall. Drill a
7/16” diameter x 3-1/2” deep hole in
the marked location, then, insert the
back bracket pin into the hole. The
front of the elbow mounting bracket
should be supported either by bottom
of the opening into chimney or installer
supplied spacer.
• Construct a weather-tight at roof to
cover the top of the old chimney. Install
the vertical terminal through this roof
using the at roof ashing.
F. Removing the Existing Boiler
For installations not involving the replacement of an
existing boiler, proceed to Step B.

Burnham Apex APX399 Specifications

General

Brand	Burnham
Model	Apex APX399
Category	Boiler
Language	English