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Concentric sidewall multiple boilers termination.
Figure 9-16
NOTE: keep the terminals horizontally in the same line and at min. 12" above grade or snow line.
Roof (Vertical) direct venting.
9.12.1 V
/
ENT
AIR TERMINATION
Follow instructions below when determining vent location to avoid possibility of severe
personal injury, death or substantial property damage.
WARNING
9.12.2 D
ETERMINE LOCATION
Locate the 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 9.1 on page 34 of this
manual.
2. Prepare the vent termination and the air intake termination elbow (Figure 9-17) by inserting bird screens.
3. The exhaust vent must terminate at least 3 feet above the highest place in which the exhaust vent penetrates
the roof and at least 2 feet above any part of a building within 10 horizontal feet.
4. The air intake piping must terminate in a down-turned 180° direction utilizing two elbows see figure 9-17
5. The exhaust piping must terminate in a vertical coupling as shown in Figure 9-17. The top of the coupling
must be at least 1 foot above the air intake. When the vent termination uses a rain cap, maintain at least 36"
(914 mm) above the air inlet. The air intake pipe and exhaust vent pipe can be located in any desired position
on the roof, provided that the exhaust vent termination is at least 1 foot above the air intake.
6. Maintain the required dimensions of the finished termination piping as shown in Figure 9-17.
7. Do not extend exposed vent pipe outside of building more than shown in this document. Condensate could
freeze and block vent pipe.
Rooftop exhaust vent and air intake inlet terminations must terminate in the same pressure
zone.
WARNING
50
–
VERTICAL
E93.1601EN032.C VGH installation manual
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