Heatilator • Caliber Multi-Sided Direct Vent • 4002-079 Rev K • 11/07
31
CORRECT
INCORRECT
Make sure the seams are not aligned to prevent unintentional
disconnection.
Figure 8.4 Seams
For 90° and 45° elbows that are changing the vent direction
from horizontal to vertical, one screw minimum should be
put in the outer
À
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
¿
c length. Cut these sections to length from the non-
expanded end (see Figure 8.5).
They can then be attached by
¿
rst connecting the expanded
end of the MI inner
À
ue with the inner pipe from the adjacent
pipe section and securing with three screws. The expanded
portion of the MI inner
À
ue must overlap completely with the
unexpanded end of the adjacent pipe section.
The outer
À
ue can then be inserted into the adjacent outer
À
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
¿
tting another pipe section to it and snapping
it together, as normal.
Assemble Slip Sections
The outer
À
ue of the slip section should slide over the outer
À
ue of the pipe section and into (inner
À
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
À
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
À
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
À
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
À
ue is not
required. All unit collar, pipe, slip section, elbow and cap
outer
À
ues shall be sealed in this manner.