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Figure 14: Vent System Field Modification to Install
PVC to PP Adapter (M&G/DuraVent shown)
Figure 15: Field Installation Procedure to Accept
Polypropylene Vent Piping - Wall Mounted Boiler
Asphyxiation Hazard. Follow these instructions and the installation instructions
included by the listed polypropylene venting component manufacturers, whichever applicable. Failure
to do so could cause products of combustion to enter the building, resulting in severe property damage,
personal injury or death. Where a conflict arises between a manufacturer instructions and these
instructions, the more restrictive instructions shall govern.
•
Do not mix vent components or joining methods for listed manufacturers.
•
Examine all components for possible shipping damage prior to installation.
•
All condensate that forms in the vent must be able to drain back to the boiler.
NOTICE
Do not exceed maximum vent/combustion air system length. Refer to “2. Vent/Combustion Air
Piping” under “A. General Guidelines” of this section for maximum vent/combustion air system length.
Use only vent and combustion air terminals and terminal locations shown in “3. Vent/Combustion Air
Terminals” under “A. General Guidelines” of this section.
C. Polypropylene Venting
WARNING
(300 mm) from roof surface. Allow additional vertical distance for expected snow accumulation.
Provide brace as required.
- Install storm collar on combustion air pipe immediately above flashing. Apply Dow Corning
Silastic 732 RTV Sealant or equivalent between combustion air pipe and storm collar to provide
weather-tight seal.
• Install rodent screen and combustion air terminal (supplied with boiler). See Figure 13 for
appropriate configuration.
• Brace exterior piping if required.
b. Optional Two-Pipe Termination into IPEX FGV or DiversiTech CVENT Concentric Terminal – vertical thru
roof, see Figures 7B and 7C.
i.
Vent Piping
• Install fire stops where vent passes through floors, ceilings or framed walls. The fire stop must close
the opening between the vent pipe and the structure.
• Follow IPEX FGV or DiversiTech CVENT concentric terminal instructions for installation details.
ii.
Combustion Air Piping
• Follow IPEX FGV or DiversiTech CVENT concentric terminal instructions for installation details.
IV. Venting
B. CPVC/PVC Venting (continued)
Summary of Contents for Alpine ALP080B
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