Flue Gas Discharge And Air Supply; General; Boiler Venting Types; Venting Options - DeDietrich 310 ECO Series Installation And Operating Manual

7.3 Flue gas discharge and air supply Venting

7.3.1 General

The Gas 310/610 ECO is suitable for both
conventional room-supplied or direct vent
(sealed combustion air) applications. All vent
terminals should comply with the local and
national codes. Any horizontal pipe-work in the
flue gas discharge system should slope towards
the boiler. Horizontal pipe-work in the air supply
system should slope towards the supply opening
and may require a drain point at the low point.
Care should be taken when locating the flue exit
points as a vapor plume will be visible when the
boiler is operational (flue gas temperature can
be less than 170°F [75°C] resulting in the water
vapor condensing upon contact with the air).

7.3.2 Boiler Venting Types

Flue gas venting material: Use only an
approved gas vent category II and IV type "BH"
Made of AL29-4C® or SS316 as approved. Do
not use PVC-CPVC plastic vent systems.

7.3.3 Venting options

The standard delivery of the De Dietrich Gas
310/610 ECO boiler can be installed with any of
the venting options listed above. See each
respective section for details.
7.3.4 Vent Termination Inlet/Outlets
The vent terminals must be installed to provide
suitable protection against wind, rain, snow or
blockage along with a rodent/debris screen.
See section 7.3.6 & 7 for other requirements.
Conventional chimney application tapered
(finishing) cone, and sidewall or direct vent
applications require a termination TEE or 90°
Elbow fitting.


Warning:
The flue gas vent pipe must be airtight and
watertight. Horizontal sections of the venting
must slope downward towards the boiler ½" per
linear foot [12mm] and adequate vent support
must be provided.

7.3.5 Combustion Air Supply Requirements


The boiler requires a clean, fresh and
adequate supply of combustion air, failure to
provide sufficient combustion air supply will
result in carbon monoxide (CO) production that
could lead to personal injury including loss of life
or damage to boiler or property. Do not store
De Dietrich Gas 310/610 ECO
any flammable liquids, fluids, vapors or materials
near the vicinity of the boiler.
Special attention:

Quality of combustion air

Dust, fumes, corrosive elements,
hydrocarbons, other unknown
containments

Paint, beauty, automotive etc. shops
Room combustion air supply requirements:
The boiler must be provided with an adequate
combustion air supply, the combustion air supply
requirements must be determined and sized in
accordance to national and local codes having
jurisdiction. CSA B149 & ANSI Z223.1 – More
than one combustion air source maybe required.
An optional filter should be fitted air intake
housing.
Air supply venting materials:
Aluminum, galvanized or stainless steel
material, do not used flexible/corrugated
materials.
Air supply structure:
The air supply pipe must also be airtight.
Horizontal sections in the air supply must slope
away from the boiler towards the supply opening
and incorporate a drain connection if the route
rises from a lower point. It is necessary to
provide an easily removable air vent for
maintenance reasons from the boiler air intake
connection.
Conventional Chimney Applications:
(Section 7.3.6)
A vertical chimney-vent system with either room
or direct vent supplied (sealed combustion) air
supply.
CLV – Sealed Combustion Systems
Applications: (Section 7.3.6)
A vertical chimney vent system with direct vent
combustion air supply (sealed combustion),
operating at two different pressure zones or vent
terminal locations.
Sidewall Vented Applications: (Section 7.3.7)
A horizontal venting system for the exhaust and
air intake, the flue gases and combustion air
terminated at same elevation and pressure level,
can be either room supplied combustion air or
direct vented (sealed combustion)
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