Heatilator • GNTC50 • 4002-095 Rev H • 06/07
29
A. Assemble Vent Sections
High Temperature Silicone Sealant
Commercial, Multi-family (multi-level exceeding two
stories), or High-rise Applications only
Figure 8.1 Lances
A
B
A
B
Figure 8.2 Inner/Outer
Figure 8.3 Snapped
CORRECT
INCORRECT
Make sure the seams are not aligned to prevent unintentional
disconnection.
Figure 8.4 Seams
8
8
Installing Vent Pipe
Fire Risk
Exhaust Fumes Risk
• Overlap pipe slip sections at least
1-1/2 in.
• Use pilot holes for screws.
• Screws must not exceed 1 in. long.
• Pipe may separate if not properly
joined.
WARNING
Attach Vent to the Firebox Assembly
To attach the
fi
rst pipe section to the collars, slide the male
end of the inner vent of the pipe section over the inner collar
on the
fi
rebox assembly. At the same time, slide the outer
fl
ue over the outer collar on the appliance. Push the pipe
section into the appliance collar until all the lances (see Fig-
ure 8.1) have snapped in place. Tug slightly on the section
to con
fi
rm it has completely locked into place.
Commercial, Multi-family (multi-level exceeding
two stories), or High-rise Applications
For installation into a commercial, multi-family (multi-level
exceeding two stories), or high-rise application: All outer
pipe joints must be sealed with high temperature silicone,
including the slip section that connects directly to the hori-
zontal termination cap.
• Apply a bead of silicone sealant inside the female outer
pipe joint prior to joining sections. See Figure 8.1.
• Only outer pipes are to be sealed. Do not seal the inner
fl
ue. All unit collar, pipe, slip section, elbow and cap outer
fl
ues shall be sealed in this manner, unless otherwise
stated.
Note:
The end of the pipe sections with the lances/tabs on
it will face towards the appliance.
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.
Fire Risk
Explosion Risk
If slip section seals are broken during the
removal of the termination cap, gas will leak
and a
fi
re or explosion may occur.
do not break silicone seals on slip sections.
WARNING
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 section
B (see Figure 8.2).
