AERCO AM Series Boiler User Manual - Manual (Page 76)

AM Series Boilers and Water Heaters
CHAPTER 3 – INSTALLATION
Page 76 of 156 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0100_0B
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3.16.5.18 Determining Location of Vertical Termination
Locate the vertical vent/air terminations using the following guidelines:
1. The total length of piping for vent or air must not exceed the limits given in the Section
3.16.3.
2. The vent must terminate at least 3 feet above the highest place in which the vent
penetrates the roof and at least 2 feet above any part of a building within 10 horizontal
feet.
3. The vent must terminate in a tee or acceptable rain-cap.
4. The air piping must terminate in a down-turned 180° return pipe no further than 2 feet
from the center of the vent pipe. This placement avoids recirculation of flue products into
the combustion air stream
5. The vent piping must terminate at least 1 foot above the air intake. The air inlet pipe and
vent pipe can be located in any desired position on the roof, but must always be no
further than 2 feet apart and with the vent termination at least 1 foot above the air intake.
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 3-37: Vertical Vent Termination