Burnham PVG, Installation, Operating And Service Instructions

Page: 17 / 68

17
Vertical Venting
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1. See Figure 29 on Page 48 for Blower Vent
Connector Assembly. Do not exceed maximum vent
lengths. Refer to Table 4.
2. Installation of a vertical vent drain 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.
E. Separate Vertical Venting System
- See Figures 6, 7, 8 and 9.
NOTICE
Roof penetrations require the use of roof flashing
and storm collar - not supplied with boiler.
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.