Noritz NRC111-SV Manuel D'installation page 47

Horizontal Vent Termination- 75mm (3") Concentric PVC/CPVC Termination
Hanger
Straps
PVC/CPVC
Coupling
*100mm (4") pipe requires the use of a reducing coupling just
prior to the termination.
75mm (3") PVC or CPVC
No. of
Max. Straight Vent Length**
Elbows
3 3m (10')
2 3.9m (13')
1 4.8m (16')
** Not including the concentric termination.
25mm (1")
Strap
Minimum
Insert Bird Screen
in End of Termination
Slope vent
Upwards
100mm (4") PVC or CPVC
Max. Straight Vent Length**
9m (30')
10.8m (36')
12.6m (42')
•
The concentric termination may be shortened,
but not lengthened from its original factory
supplied length.
•
75mm (3") or 100mm (4") PVC or CPVC pipe
may be used with the concentric termination.
Maintain the same vent pipe diameter from the
water heater flue to the termination.
Do not exceed the maximum vent lengths as
•
specified in this section.
• When using 100mm (4") pipe, it will be necessary
to use 100mm (4") x 75mm (3") reducing couplings
and a short section of 75mm (3") pipe to connect
to the termination.
Use no more than a 150mm (6") section pipe to
make the connection between the reducing
couplings and the termination.
• When using 75mm (3") pipe, it will be necessary
to use 100mm (4") x 75mm (3") reducing couplings
to connect the vent pipe to the water heater flue.
•
There must be a minimum of 25mm (1") clearance
between the outside wall and the air intake section
of the termination as illustrated on the left.
•
Install a securing strap to prevent movement of
the termination.
•
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" upwards
for every 300mm (12").
•
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.
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