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UEZ-IOM (07-23) 1034347-I
Figure 14. Option CC2 Components
• Install the vertical vent kit as follows:
⚠ DANGER ⚠
To prevent combustion products from entering the occupied space, all vent terminals must be
positioned or located away from fresh air intakes, doors, and windows. Failure to comply could
result in severe personal injury or death and/or property damage.
1. Determine vent terminal location on outside wall:
a. If more than one vertical vent terminal is being installed, minimum spacing between vent center lines is
determined by minimum outdoor design temperature (coldest outdoor condition at installation site). Refer to
Table 16 to ensure that location complies with minimum outdoor design temperature requirements.
RAIN COLLAR
COMBUSTION AIR INLET BIRD GUARD
b. Select location away from fresh air intakes, allowing space for concentric adapter box inside. Vent terminal
must be located away from adjacent buildings as shown in Figure 15.
2. Install vent pipe and combustion air pipe runs:
a. Connect piping to heater in accordance with specifications listed in Vent/Combustion Air System Piping
Requirements section.
b. Seal all joints in accordance with specifications listed in Vent/Combustion Air System Piping Joints section.
Due to high temperature considerations, do not enclose exhaust pipe or place pipe closer than 6 inches (152
mm) to combustible material.
c. Extend piping runs close to roof at location selected in step 1 and support piping in accordance with specifications
listed in Vent/Combustion Air System Piping Support section.
NOTE: The vent pipe will extend through the roof after the concentric adapter box is installed. The
indoor combustion air pipe will end at the box.
3. Cut hole through outside wall for combustion air pipe.
a. Ensure that location and orientation of concentric adapter box are correct and mark and cut hole.
b. Ensure that hole accommodates 8-inch (203-mm) combustion air pipe.
Table 16. Minimum Spacing Between Center Lines of Vertical Vent Pipes
Minimum Outdoor Design Temperature
Minimum Spacing Between Center Lines of Vertical Vent Pipes
(Inches (mm))
≥31°F (≥0°C) 36 (914)
−10 to 30°F (−23 to −1°C) 60 (1524)
< −10°F (< −23°C) 84 (2134)
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