Direct Vent-Sealed Combustion Application - DeDietrich C230 ECO-A 120 Installation, Operating And Service Manual

C230 ECO-A 7 Flue gas discharge and air supply
Chimney applications
This venting system uses a single vent to discharge all flue gases to
the outside vertically, combustion air provided with the boiler room,
the air source must be sized in accordance to national codes CSA
B149 & ANSI Z223.1 or local codes having jurisdiction, more than one
source may be required.
Different Pressure Zones [CLV]
This venting system uses two separate vents, a vent for combustion
air and another for the flue gases. Combustion air is not used within
the boiler room. All combustion air is from the outdoor source. The
vent terminal shall discharge flue gases away from the building
structure so that the flue gases do not cause damage to the building.
The vent terminal locations follow local and national codes
requirements. See section 7.1.8.
Application Note
In all applications the venting must be between the minimum and
maximum equivalent vent lengths shown in Table 1 or Table 2. For
values not shown in the chart, consult your local De Dietrich
Representative.
Exterior Venting
The venting shall be suitable for exterior applications, the flue exit
point shall be provided with a tapered [finishing] cone, with a
debris/bird-rodent screen, combustion air inlet shall be provide with a
termination 90° elbow with a debris/bird-rodent screen.
Flue gas condensation is very aggressive and corrosive which could
lead to failure of the venting system or drains, consult local and
national codes regarding flue gas condensation disposal. The P-trap
assembly must be properly filled with water to avoid escape of the flue
gas emissions. The flue gas condensation may require neutralization
prior to entering the drain.
7.1.6

Direct Vent-Sealed Combustion Application

An improperly sealed venting system could result in carbon monoxide
poisoning; ensure adequate support and fastening of the system.
Ensure venting can safely exhaust all flue gases to the outside in a
safe and effective manner. Do not puncture or drill holes in any portion
of the venting, the boiler is equipped with a pressure and emission
test port. All venting must be arranged to avoid and prevent the
accumulation of flue gas condensation. Where necessary, have
means provided for drainage of condensate.
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