Locating Vent & Combustion Air Terminals - Bradford White Brute BNTH Installation And Operation Instructions Manual

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branch connection sized to allow for insertion of a flue
gas analyzer probe. The branch connection must be
resealable with a cap or other by other means to ensure
the vent system remains sealed. (See Figure 11.)
Consideration must be given to the placement and
orientation of the flue gas sampling port to ensure that
condensate is free to flow back into the Brute unit and
not collect anywhere in the vent system - including in the
flue gas sampling port.
An exhaust vent terminal must be installed. If an exhaust
vent terminal is not available with the certified vent
system, Bradford White suggests the use of a coupler
fitting from the certified vent system into which the vent
terminal screen, included with the Brute and shown in
the Unpacking section, be installed. Be sure to install
and terminate both vent and combustion air pipes per
the Venting and Combustion Air section of the Brute
instructions.
3.3 Locating Vent and Combustion Air
Terminals
Side Wall Vent Terminal
The appropriate Bradford White side wall vent terminal
must be used. The terminal must be located in
accordance with ANSI Z223.1/NFPA 54 and applicable
local codes. In Canada, the installation must be in
accordance with CSA B149.1 or .2 and local applicable
codes. Consider the points listed on the following page
when installing the terminal.
1. Figure 12 shows the requirements for mechanical
vent terminal clearances for the U.S. and Canada.
2. Vent terminals for condensing appliances or
appliances with condensing vents are not permitted
to terminate above a public walkway, or over an
area where condensate or vapor could create a
nuisance or hazard.
3. Locate the vent terminal so that vent gases cannot
be drawn into air conditioning system inlets.
4. Locate the vent terminal so that vent gases cannot
enter the building through doors, windows, gravity
inlets or other openings. Whenever possible, avoid
locations under windows or near doors.
5. Locate the vent terminal so that it cannot be
blocked by snow. The installer may determine
that a vent terminal must be higher than the
minimum shown in codes, depending upon
local conditions.
6. Locate the terminal so the vent exhaust does not
settle on building surfaces or other nearby objects.
Vent products may damage surfaces or objects.
7. If the boiler or water heater uses ducted combustion
air from an intake terminal located on the same
wall.
If the vent termination is located in an area exposed to
high winds, an optional PVC tee (the same diameter as
the vent pipe) may be used. The tee'd vent termination
offers greater protection from wind related operating
issues.
Side Wall Combustion Air Terminal
The Bradford White side wall combustion air terminal, or
concentric terminal must be used when the heater takes
air from a side wall. (See Table 3.) Contact Bradford
White for AL29-4C termination fittings. Consider the
following when installing the terminal. (See Figures 13-
15.)
1. Do not locate the air inlet terminal near a source
of corrosive chemical fumes (e.g., cleaning fluid,
chlorine compounds, etc.)
2. Locate the terminal so that it will not be subject to
damage by accident or vandalism. It must be at
least 7 feet (2.1m) above a public walkway.
3. Locate the combustion air terminal so that it cannot
be blocked by snow. The National Fuel Gas Code
requires that it be at least 12 inches (30cm) above
grade, but the installer may determine it should be
higher, depending upon local conditions.
4. If the Brute is side-wall vented to the same wall,
locate the vent terminal at least 1 foot (0.3m) above
the combustion air terminal.
5. For concentric vent, follow instructions
included with vent kit.
6. Multiple vent kits should be installed such that the
horizontal distance between the outlet group and
the inlet group is 36" (90cm). (Figure 14.)
7. The vent outlet for models 199-285 must be no
lower than the center of the air inlet, and must be
at least 12" (30cm) away from the air inlet. Vent
outlets for models 399-850 must be at least 12"
above the top of the air inlet, and must be at least
36" (90cm) horizontally from the air inlet. (Figure
14.)
Vertical Vent Terminal
When the unit is vented through the roof, the vent must
extend at least 3 feet (0.9m) above the point at which it
penetrates the roof. It must extend at least 2 feet (0.6m)
higher than any portion of a building within a horizontal
distance of 10 feet (3.0m), and high enough above
the roof line to prevent blockage from snow. The vent
terminal included with the Brute can be used in both
vertical and horizontal applications. When the combustion
air is taken from the roof, the combustion air must
terminate at least 12" (30cm) below the vent terminal. (See
Figure 10.)
Vertical Combustion Air Terminal
When combustion air is taken from the roof, a field-
supplied rain cap or an elbow arrangement must be used
to prevent entry of rain water. (Figure 10.) The opening on
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