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Finned copper tube gas boilers & water heaters – Boiler Manual
10
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Th e vent piping must be large enough to safely vent the
combined output of all of the appliances connected
to the system.
If an appliance using any type of a mechanical draft
system operating under positive pressure is connected
to a chimney fl ue, never connect any other appliances
to this fl ue. Doing so can result in excessive levels of
carbon monoxide which can cause severe personal
injury or death!
CATEGORY II CHIMNEY INSPECTION
& SIZING
Masonry chimneys, when used, must be lined with a
metal liner certifi ed for Category IV venting.
A thorough inspection of the masonry chimney must be performed
to ensure that the chimney is clean, properly constructed, lined
and sized. Exterior masonry chimneys should not be used unless
properly lined to prevent condensation and draft problems.
Table 6 lists the minimum riser sizes required for the Fusion boiler/
water heater.
Table 6
Equivalent Breeching & Chimney Size, Negative Pressure
Model
Size
Pipe Diameter
in
mm
500
7
178
750
7
178
1000
8
203
1250
8
203
1500
8
203
1750
10
254
2000
10
254
Note: These sizes are based on a
20 ft
,
6.1 m
chimney height.
CATEGORY II VENT CONNECTIONS
Locate the boiler/water heater as close to the chimney as possible.
Use the shortest, straightest vent connector possible for the installation.
If horizontal runs exceed
5 ft
,
1.5 m
they must be supported at
3 ft
,
0.9 m
intervals with overhead hangers.
Th e boiler vent connectors should be sloped up toward the breeching
at a minimum rate of
1/4 in per ft
,
21 mm per m
.
Always provide a minimum clearance of
6 in
,
152 mm
between
single wall vent pipe and any combustible materials.
Failure to maintain minimum clearances between
vent connectors and any combustible material can
result in a fi re causing extensive property damage,
severe personal injury or death!
Vent Connections
Locate the boiler/water heater as close to the chimney as possible.
Use the shortest, straightest vent connector possible for the instal-
lation. If horizontal runs exceed
5 ft
,
1.5 m
they must be supported
at
3 ft
,
0.9 m
intervals with overhead hangers.
Th e vent connector should be sloped up toward the chimney at a
minimum rate of
1/4 in/ft
,
21 mm/m
. On masonry chimneys the
connector must terminate fl ush with the inside of the chimney fl ue.
Always provide a minimum clearance of
6 in
,
152 mm
between
single wall vent pipe and any combustible materials.
Failure to maintain minimum clearances between vent
connectors and any combustible material can result
in a fi re causing extensive property damage, severe
personal injury or death!
Exit cones are favorable when used to increase
the velocity of the fl ue gas exiting the stack and,
may also help, in cold climates, to reduce ice build-
up. Exit cone terminations must be supplied by
others, installed per manufacturer’s instructions,
and meet local and federal code.
OUTDOOR VENTING
When installed outdoors the Futera Fusion must be fi tt ed with the
factory supplied outdoor hood, air intake adapter with fi lter and
exhaust terminal, see Figure 7. Multiple units must be spaced per
Figure 8.
Th e boiler/heater must be at least
2 ft
,
.62 m
from any door, window
or gravity air inlet into any building and at least
3 ft
,
1 m
from any
overhang unless local codes dictate diff erently.
Avoid locations where wind defl ection off of adjacent walls,
buildings or shrubbery might cause a downdraft . Th e unit(s) should
be located at least
3 ft
,
1 m
from structures. Outdoor installations
are not recommended in areas where the danger of snow blockage
exists.
Do not place the boiler/water heater in a location that
would subject it to runoff from adjacent buildings or
damage may occur voiding the warranty!
Outdoor Installations
Th e Futera Boiler is certifi ed for outside installations
in temperate climates only.
1. Th e condensate traps located under the secondary heat exchanger
and the vent pipe must be wrapped with heat tape to ensure the
traps never drop below 32°F.
2. Th e vent pipe must be insulated to prevent freezing of condensate
in the pipe.
3. Th e boiler and system must be fi lled with an ethylene glycol/
water antifreeze mixture not to exceed 50% glycol by volume.
4. All water piping exposed to low temperatures must be insulated.
generic exit cone
