Gas-Fired Boiler / Water Heater Installation, Operating and Service Instructions

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Figure 16: Vertical Vent Installation
b. Secure to vertical vent tee with hose clamp or
plastic cable tie.
c. Run condensate drain line to fl oor drain or
condensate pump. Condensate disposal must be
acceptable to authority having jurisdiction.
3. Slope horizontal runs minimum ¼ inch per foot.
Slope toward 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 fi restops at fl oor and ceiling where vent
passes through fl oor, ceiling, or framed wall. The
fi restop must close the fl oor or ceiling opening
between vent pipe and structure. Firestop
manufacturers are Air-Jet, American Metal Products,
Metal-Fab, and Simpson Dura-Vent.
5. Enclose vent passing through unoccupied or
occupied spaces above the appliance with materials
having a fi re resistance rating at least equal to the
rating of adjoining fl oor or ceiling. Maintain 5 inch
minimum clearance to combustible materials. Note:
For one-or two-family dwellings fi re resistance
rating requirement may not need to be met, but is
recommended.
Figure 17: Attic Offset
Figure 18: Vertical Vent Termination
Figure 19: Vertical Air Intake Termination
6. Whenever possible install vent straight through roof.
Refer to Figure 17 if offset is necessary. Maintain 5
inch minimum clearance to combustible materials.
7. Install Vent Terminal. See Figure 18.
a. Locate roof opening to allow vertical vent
penetration. Size opening to maintain 5 inch
minimum clearance from combustible materials.
b. Vertical venting requires use of roof fl ashing
(available from Burnham - P/N 8116250) and
storm collar (available from Burnham - P/N
8116251) to prevent moisture from entering the
structure.
c. Extend vent pipe to maintain minimum vertical
and horizontal distance of 12 inches from roof
surface. Allow additional vertical distance for
expected snow accumulation. Provide brace as
required. Refer to Figure 18.
d. Install storm collar on vent pipe immediately
above roof fl ashing. Apply Dow Corning
Silastic 732 RTV Sealant between vent pipe and
storm collar to provide weathertight seal..
e. Attach Vent Terminal.
J. Install Air Intake Pipe.
1. Locate air intake termination on the same wall or
roof location as the vent termination if possible, to
prevent nuisance boiler shutdowns. However, boiler
Extend Vent/Air Intake Piping to maintain minimum vertical ("X") and minimum horizontal ("Y") distance
of twelve (12) inches from roof surface. Allow additional vertical ("X") distance for expected snow