Heatilator CNXT4236IH CNXT4842IH, Owner'S Manual

Page: 36 / 92

36 Heatilator • Caliber CNXT Series • 4047-132 Rev P • 11/07
Assemble Minimum Installation (MI) Sections
MI sections are non-unitized so that they can be cut to a
certain 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.
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.
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.