Assemble Slip Sections; Secure The Vent Sections - Heatilator Direct Vent Gas Appliance CNXT4236IH Owner's Manual

C. Assemble Slip Sections
WARNING! Risk of Fire or Asphyxiation! Overlap pipe
sections at least 1 1/2 in. (38 mm). Secure slip sections
with two screws which must not exceed 1/2 in. (13 mm)
in length. Use the pilot holes. Pipe could separate if not
properly joined.
• Slide the inner fl ue of the slip section into the inner fl ue of
the pipe section and the outer fl ue of the slip section over
the outer fl ue of the pipe section. See Figure 11.7.
• Slide together to the desired length.
Figure 10.7 Slip Section Pilot Holes
• Maintain a 1-1/2 in. (38 mm) overlap between the slip
section and the pipe section.
• Secure the pipe and slip section with two screws no
longer than 1/2 in. (13 mm), using the pilot holes in the
slip section. See Figure 10.8.
Figure 10.8 Screws into Slip Section
• Continue adding pipe as necessary following instructions
in "Assembling Pipe Sections."
NOTICE: If slip section is too long, the inner and outer fl ues
of the slip section can be cut to the desired length.
NOTICE: 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.
44 Heatilator • Caliber CNXT Series • 4047-132 Rev U • 11/08
D. Secure the Vent Sections
• Vertical runs of DVP pipe must be supported every 8 ft.
(2.44 m) after the 25 ft. (7.62 m) maximum unsupported
rise.
• Vertical runs of SLP pipe must be supported every 8 ft.
(2.44 m).
• Horizontal sections of vent must be supported every 5
ft. (1.52 m) with a vent support or plumber's strap.
• Wall shield fi restops may be used to provide horizontal
support.
• Vent support or plumber's strap (spaced 120° apart)
may be used for support. See Figures 10.9 and 10.10.
• SLP ceiling fi restops have tabs that may be used to
provide vertical support.
WARNING! Risk of Fire, Explosion or Asphyxi-
ation! Improper support may allow vent to sag and
separate. Use vent run supports and connect vent
sections per installation instructions. DO NOT allow
vent to sag below connection point to appliance.
Figure 10.9 Securing Vertical Pipe Sections
Figure 10.10 Securing Horizontal Pipe Sections