Riello Array AR 800 Installation And Operation Manual page 25

6" Air Intake
Fig. 28 AR 800 Combustion Air and Flue Gas connections
9
DANGER: The condensate traps must be filled with water
or combustion gases will enter the room with a risk of an
excessive level of carbon monoxide.
7
− Vent connectors serving appliances vented by natural draft
shall not be connected to any portion of mechanical draft
systems operating under positive pressure.
− Ensure the flue pipes and seals are not damaged.
− Use only primer and glue compounds approved for use
with the vent material used.
− Never install a barometric or a thermally controlled vent
damper with this boiler.
− Do not route the flue system piping through or inside
another duct that is used for exhausting air or other flue
gases.
− The condensate traps must be primed at all times. Failure
to do so may allow combustion gases to escape into the
boiler room.
− The unit is to be used for either direct vent installation or for
installation using room air for combustion. When room air
is used, it is necessary to provide an adequate opening for
the fresh make-up air intake.
− You must use any of the vent/air piping methods shown in
this manual.
− Be sure to locate the unit such that the vent and combustion
air piping can be routed through the building and properly
terminated.
− The boiler / vent installation must be in accordance with
Venting of Appliances, of the latest edition of the National
Fuel Gas Code, ANSI Z223.1/NFPA or applicable provisions of
the local, state and federal building codes.
− All vent pipes must be installed according to the vent
manufacturer's instructions.
− The exhaust vent and the combustion air inlet lines must be
supported to prevent sagging per the vent manufacturer's
instructions.
− The boiler must not support the weight of any ductwork.
6" Flue Gas − Do not mix components from different systems. The vent
system could fail, causing leakage of flue products into the
Connection
living space. Use only approved materials.
− Use of cellular core PVC and CPVC for venting system is not
allowed.
− The vent system shall be installed so as to prevent the
accumulation of condensate.
− Consult local and state codes pertaining to special building
code and fire department requirements. Adhere to national
code requirements.
− Observe the listed maximum lengths of vent system, which
are boiler model dependent.
− To avoid moisture and frost build-up and to maintain
clearances to openings on adjacent structures, 45° and
90° elbows or tees may be attached to the end of the
vent termination pipe to direct exhaust plumes away from
the adjacent structure. The total allowable vent length,
maximum number of elbows and distance of air intake
restrictions must be adhered to.
− Due to the high efficiency of the unit it may discharge what
looks like white smoke especially when the outside air
temperature is cold. This is due to the presence of water
vapor, normally present in the exhaust gases.
25
INSTALLATION