Lochinvar FTxl 400 Installation & Operation Manual page 25

4
Sidewall direct venting
Vent/air termination – sidewall
Figure 4-2A PVC/CPVC/ Polypropylene Sidewall
Termination Models 400 - 850 w/Field Supplied Fittings
Figure 4-2B Stainless Steel Sidewall Termination Models
725 - 850 w/Field Supplied Fittings
NOTICE PVC/CPVC or ABS is acceptable air inlet pipe material.
5. Maintain clearances as shown in FIG.'s 4-1A thru 4-4B,
pages 24 thru 26. Also maintain the following:
a. Vent must terminate:
• At least 6 feet (1.8 m) from adjacent walls.
• No closer than 12 inches (305 mm) below roof
overhang.
• At least 7 feet (2.1 m) above any public walkway.
• At least 3 feet (.9 m) above any forced air intake
within 10 feet (3 m).
• No closer than 12 inches (305 mm) below or
horizontally from any door or window or any other
gravity air inlet.
b. Air inlet must terminate at least 12 inches (305 mm)
above grade or snow line; at least 12 inches (305 mm)
below the vent termination (FIG. 4-1B); and the vent
pipe must not extend more than 24 inches (610 mm)
vertically outside the building.
Installation & Operation Manual
(continued)
c. Do not terminate closer than 4 feet (1.2 m)
horizontally from any electric meter, gas meter,
regulator, relief valve, or other equipment. Never
terminate above or below any of these within 4 feet
(1.2 m) horizontally.
6. Locate terminations so they are not likely to be damaged by
foreign objects, such as stones or balls, or subject to buildup
of leaves or sediment.
Figure 4-3A Clearance to Gravity Air Inlets w/Field
Supplied Fittings
Figure 4-3B Clearance to Gravity Air Inlets
25