Noritz NRC111-SV Manuel D'installation page 46

Horizontal Vent Termination- PVC/CPVC Materials Only
Insert Bird
Screen* in
End of Each
90° Elbow
Intake
Exhaust
**0.3m (1')
Minimum
* Not supplied with water heater,
order separately.
**0.3m (1') minimum recommended,
but not required.
Vertical Vent Termination- PVC/CPVC Materials Only
Storm
Collar
Intake
46
45°
45°
3 ft. Min.
Hanger
Straps
Slope vent
Upwards
PVC/CPVC
Coupling
3 ft. Min.
Insert Bird
Screen* in
Insert Bird Screen*
End of
90° Elbow
in End of 45° Elbow
12" over maximum
snow level
Roof
or 24", whichever
Flashing
is greater.
Roof
Storm
Flashing
Collar
Exhaust
Firestop/Support
Support
Firestop Firestop
Hanger
Strap
Slope vent
Upwards
**0.3m (1')
Minimum
PVC/CPVC
Coupling
* Not supplied with water heater,
order separately.
**0.3m (1') minimum recommended,
but not required.
•
As illustrated on the left, make sure to keep a
distance of 0.9m (3') or wider between the intake
and exhaust when installing the vent piping.
•
Terminate at least 300mm (12") above grade
or above snow line.
•
Terminate at least 2.1m (7') above a public
walkway, 1.8m (6') from the combustion air
intake of any appliance, and 0.9m (3') from
any other building opening, gas utility meter,
service regulator etc.
•
Terminate at least 0.9m (3') above any forced
air inlet within 3m (10'), 1.2m (4') below, 1.2m
(4') horizontally from or 0.3m (1') above any
door, window, or gravity air inlet into any
building per National Fuel Gas Code ANSI
Z223.1/NFPA 54.
• Slope the horizontal vent 1/4" upwnwards
for every 300mm (12") toward the termination.
•
Use a condensation drain if necessary.
•
In the Commonwealth of Massachusetts
a carbon monoxide detector is required
for all side wall horizontally vented gas
fuel equipment. Please refer to Technical
Bulletin TB 010606 for full installation in
structions.
• As illustrated on the left, make sure to keep a
distance of 0.9m (3') or wider between the intake
and exhaust when installing the vent piping.
•
Terminate at least 1.8m (6') from the combustion
air intake of any appliance, and 0.9m (3') from any
12" over maximum
snow level
other building opening, gas utility meter, service
or 24", whichever
is greater.
regulator etc.
•
Enclose exterior vent systems below the roof
line to limit condensation and protect against
mechanical failure.
• When the vent penetrates a floor or ceiling and
is not running in a fire rated shaft, a firestop and
support is required.
•
When the vent termination is located not less than
2.4m (8') from a vertical wall or similar obstruction,
terminate above the roof at least 0.6m (2'), but not
more than 1.8m (6'), in accordance with the
National Fuel Gas Code ANSI Z223.1/NFPA 54.
•
Provide vertical support every 0.9m (3') or as
required by the vent pipe manufacturer's instructions.
•
A short horizontal section is recommended to
prevent debris from falling into the water heater.
•
When using a horizontal section, slope the
horizontal vent 1/4" upwards for every 300mm (12")
toward the termination to drain condensate.