Flue Gas Discharge And Air Supply; General; Boiler Venting Types - DeDietrich C230 ECO-A 120 Installation, Operating And Service Manual

C230 ECO-A
7

Flue gas discharge and air supply

7.1

General

The C230 ECO-A is suitable for both conventional room-supplied or
sealed combustion. Sealed combustion 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 flue exit positions as a vapor plume will be
visible when the boiler is operational (flue gas temperature will be less
than 170°F [77°C] resulting in the water vapor condensing out on
contact with the air).
Provisions for combustion and ventilation air in accordance with
section 5.3, Air for Combustion and Ventilation, of the National Fuel
Gas Code, ANSI Z223.1/NFPA 54, or Sections 7.2, 7.3 or 7.4 of the
Natural Gas and Propane Installation Code, CAN/CSA B149.1, or
applicable provisions of the local building codes.
For boilers for connection to gas vents or chimneys, vent installation
shall be in accordance with Part 7, Venting of Equipment, of the
National Fuel Gas Code, ANSI Z223.1/NFPA 54, or Section 7, Venting
Systems and Air Supply for Appliances, of the Natural Gas and
Propane Installation Code, CAN/CSA B149.1, or applicable provisions
of the local building codes.
The venting system shall be installed in accordance with the boiler
manufacturer's installation instructions.
The horizontal portions of the venting system shall be supported to
prevent sagging. Follow the instructions of the supplier of the venting
system.
7.1.1

Boiler Venting Types

Flue gas venting
Use only an approved gas vent category II and IV type "BH" (AL29-4C
stainless steel vent material). Plastic vent material (CPVC/PVC) can
be used where local/national codes allow.
Conventional Chimney Applications
A vertical chimney-vent system with the air supply, required for
combustion, provided within the boiler room or combustion air source
provided into the room.
CLV – Direct Vent (Sealed Combustion) Systems Applications
Vertical or horizontal venting systems for both, the flue gases and
combustion air operating at two different pressure zones or vent
terminal locations.
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