E. Vertical Venting System - See Figures 6, 7 and 8.
NOTICE
Roof penetrations require the use of roof flashing and storm collar - not supplied with boiler.
Vent Piping –
1.Do not exceed maximum vent lengths. Refer to Table 4.
2.Installation of a vertical vent tee 8116304U is required on all vertical vent applications. See Figures 6 and 7. Attach vertical vent drain tee directly to elbow or horizontal pipe from an elbow immediately after vent connector.
3.Slope horizontal runs minimum ¼ inch per foot. Slope towards vertical vent drain tee. Position weld seams in vent pipes, in all horizontal runs, at the top to avoid condensate from lying on the seams.
4.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.
5.Whenever possible, install vent straight through the roof. Refer to Figure 7 if offset is necessary.
Maintain minimum clearance to combustible materials.
6.Install Vent Terminal.
a.Size roof opening to maintain minimum clearance from combustible materials.
b.Extend vent pipe to maintain minimum vertical and horizontal distance of twelve (12) inches from roof surface. Allow additional vertical distance for expected snow accumulation. Provide brace as required. Refer to Figure 8.
c.Install storm collar on vent pipe immediately above flashing. Apply Dow Corning Silastic 732
RTV Sealant between vent pipe and storm collar to provide weathertight seal.
d.Attach vent terminal.
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