13
LP- 428 REV. 9.2.14
Check with your local Authority Having Jurisdiction for requirements when installing boiler. Please read the entire manual before
attempting installation. Failure to properly take factors such as boiler venting, piping, condensate removal, and wiring into account
before installation could result in wasted time, money, and possible property damage and personal injury.
E. EXHAUST VENT AND INTAKE PIPE
The appliance is rated ANSI Z21.13 Category IV (pressurized vent, likely to form condensate in the vent) and requires a special vent
system designed for pressurized venting.
NOTE: The venting options described here (and further detailed in the Venting section of this manual) are the lone venting
options approved for this appliance. Failure to vent the appliance in accordance with the provided venting instructions will
void the warranty.
Failure to vent the appliance properly will result in serious personal injury or death.
Vents must be properly supported. Appliance exhaust and intake connections are not designed to carry heavy weight. Vent support
brackets must be within 1’ of the appliance and the balance at 4’ intervals. Appliance must be readily accessible for visual inspection for
the first 3’ from the appliance.
1. DIRECT VENT INSTALLATION OF EXHAUST VENT AND INTAKE PIPE
If installing a direct vent option, combustion air must be drawn from the outdoors directly into the appliance 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 appliance such that the exhaust vent and intake piping 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 piping 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 1.
Figure 3 – Service Clearances
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