Riello Array AR 399 SE Installation, Operation And Service Manual page 63

APPENDIX
APPROVED EXAMPLES OF HORIZONTAL AND VERTICAL
VENTING INSTALLATION
9
NOTE: Place pipe supports a minimum of every 5 feet (1.525
mm) for horizontal and vertical runs, beginning with a sup-
port near the boiler unless the vent manufacturer or local
code states smaller intervals. Venting shall also be supported
at each connection point and 90 or 45 degree elbow. The first
support shall be located close to the boiler. Ensure that proper
venting supports are used for the vent type per the venting
manufacturer's instructions. Failure to comply may cause vent
separation resulting in a risk of carbon monoxide poisoning
causing severe injury or death.
− Horizontal vent runs shall be supported where necessary to
prevent sagging.
− Ensure horizontal vent runs have a upwards slope no less
then 1/4 in/ft (21 mm/m) from the boiler to the vent termi-
nal.
− The boiler and venting shall be installed so as to prevent
accumulation of condensate; and where necessary, have
means provided for drainage of condensate.
− The condensate must be disposed of in accordance with
applicable code.
− Periodic cleaning of the vent terminal and air-intake
screens is mandatory.
− Avoid locating vent terminals near equipment or building
features which can be subject to degradation from exhaust
gases.
− If multiple boilers are installed in a row, allow at least 1 foot
(305 mm) clearance between the vent termination of one
and the combustion air intake of the other.
In the following figures, the combustion air intake pipe is indi-
cated with the number 1 (one) and the exhaust vent pipe with the
number 2 (two).
Horizontal venting system (room air only)
2
1
2
Horizontal venting system (room air only); X≥4" (102 mm)
2
Vertical venting system (room air only); X > 12" (305 mm); Y
12" (305 mm) above maximum snow level or at least 24" (610
mm) whichever is greater
2
63 63
RECYCLING AND DISPOSAL
2
1
X
X
1
APPENDIX