32
Heatilator • Novus DV • 4031-550 Rev G • 11/07
Assemble Pipe Sections
Insert the inner
fl
ue of section A into the
fl
ared inner
fl
ue of
section B.
Start the outer
fl
ue of section A over the outer
fl
ue of sec-
tion B (see Figure 8.2).
Once both inner and outer
fl
ues are started, press section
A onto section B
fi
rmly until all lances have snapped into
place. Check to make sure they have snapped together (see
Figure 8.3) and the seams are not aligned (see Figure 8.4).
Tug slightly on section A to con
fi
rm it has completely locked
into place. It is acceptable to use screws no longer than 1
in. (25 mm) to hold outer pipe sections together. If predrilling
holes, do NOT penetrate inner pipe.
For 90° and 45° elbows that are changing the vent direction
from horizontal to vertical, one screw minimum should be
put in the outer
fl
ue at the horizontal elbow joint to prevent
the elbow from rotating. Use screws no longer than 1 in. (25
mm). If predrilling holes, do NOT penetrate inner pipe.
Assemble Minimum Installation (MI) Sections
MI sections are non-unitized so that they can be cut to a
speci
fi
c length. Cut these sections to length from the non-
expanded end (see Figure 8.5).
They can then be attached by
fi
rst connecting the expanded
end of the MI inner
fl
ue with the inner pipe from the adjacent
pipe section and securing with three screws. The expanded
portion of the MI inner
fl
ue must overlap completely with the
unexpanded end of the adjacent pipe section.
Figure 8.5 MI Sections
Figure 8.6 Slip Section Pilot Holes
Figure 8.7 Screws into Slip Section
Note:
When installing a vent system with an HRC
termination cap, all pipe system joints shall be sealed using
a high-temperature silicone sealant.
• Apply a bead of silicone sealant inside the female outer
pipe joint prior to joining sections.
• Only outer pipes are sealed, sealing the inner
fl
ue is not
required. All unit collar, pipe, slip section, elbow and cap
outer
fl
ues shall be sealed in this manner.
The outer
fl
ue can then be inserted into the adjacent outer
fl
ue expanded end and attached to the next pipe section with
three screws. The other end of the MI pipe section can then
be attached by
fi
tting another pipe section to it and snapping
it together, as normal.
Assemble Slip Sections
The outer
fl
ue of the slip section should slide over the outer
fl
ue of the pipe section and into (inner
fl
ue) the last pipe sec-
tion (see Figure 8.6).
Slide together to the desired length, making sure that a
1-1/2 in. outer
fl
ue overlap is maintained between the pipe
section and slip section.
The pipe and slip section need to be secured by driving two
screws through the overlapping portions of the outer
fl
ues
using the pilot holes (see Figure 8.7).
This will secure the slip section to the desired length and
prevent it from separating. The slip section can then be at-
tached to the next pipe section.
If the slip section is too long, the inner and outer
fl
ues of the
slip section can be cut to the desired length.
