Applications; Direct Vent Installation Of Exhaust And Intake - NTI TRX085 Installation, Start-Up, Maintenance, Parts, Warranty

Part 5 - Venting
H. Applications

1. Direct Vent Installation of Exhaust and Intake

If installing a direct vent option, combustion air must be drawn
from the outdoors directly into the boiler intake, and exhaust must
terminate outside. There are three basic direct vent options detailed
in this manual:
1. Side Wall Venting,
2. Roof Venting, and
3. Unbalanced Venting.
Be sure to locate the boiler such that the exhaust vent and intake
pipe can be routed through the building and properly terminated.
Different vent terminals can be used to simplify and eliminate multiple
penetrations in the building structure (see Optional Equipment in
Venting Section). The exhaust vent and intake pipe lengths, routing
and termination methods must all comply with the methods and limits
given in the Venting section of this manual.
When installing a combustion air intake from outdoors, care must be
taken to utilize uncontaminated combustion air.
NOTE: To prevent combustion air contamination, see Table 6.
WARNING
All vent pipes must be glued, properly supported, and the exhaust
pitched a minimum of 1/4" per foot back to the boiler to allow drainage
of condensate. When placing support brackets on vent piping, the first
bracket must be within 1 foot of the boiler and the balance of 4 foot
intervals on the vent pipe. Venting must be readily accessible for visual
inspection from the first three feet from the boiler.
Take extra precaution to adequately support the weight of vent pipes
terminating through the roof. Failure to properly support roof terminated
piping could result in property damage, serious injury, or death.
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