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UEZ-IOM (07-23) 1034347-I
Rear
View
Side View
INSTALLATION—CONTINUED
Vent Connections—Continued
Vertical Vent Terminal (Option CC2) Installation—Continued
Figure 15. Option CC2 Installation
4. Connect combustion air pipe to concentric adapter box (see Figure 16):
a. Determine length of combustion air pipe so that dimension X in Figure 16 is equal to roof thickness plus
anticipated snow depth. Ensure that length of combustion air pipe does not exceed 48 inches (1,219 mm) or
does not extend less than 18 inches (457 mm) above roof.
b. Secure inlet air pipe to collar of concentric adapter box using sheet metal screws. Seal joint and seam using
tape or sealant.
5. Secure concentric adapter box to underside of roof (see Figure 15):
a. Insert combustion air pipe through roof as shown in Figure 16, DETAIL A.
b. Position concentric adapter box to match pipe runs and secure box to underside of roof using field-supplied
hardware.
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