Noritz GQ-C2857WS-FF US Installation Manual page 15

Vent Pipe Installation
Horizontal Vent Termination- PVC/CPVC Materials Only
Hanger
Intake
Exhaust
Vent Upward
**1'
Minimum
* Not supplied with water heater,
order separately.
**1' mini mum recommended,
but not required.
When choosing intake and exhaust terminations, you must use the
same type of elbow (i.e. both 90° elbows).
This will help with proper combustion by putting both terminations in
the same pressure zone.
Vertical Vent Termination- PVC/CPVC Materials Only
3 ft. Min.
Insert Bird
Screen* in
End of
90 Elbow
12" over maximum
snow level
Roof
Storm
or 24", whichever
Flashing
Collar
is greater.
Storm
Collar
Intake
Exhaust
Firestop/Support
Support
Firestop
Hanger
Strap
Slope the
Vent Upward
**1'
Minimum
* Not supplied with water heater,
order separately.
**1' minimum recommended,
but not required.
When choosing intake and exhaust terminations, you must use the
same type of elbow (i.e. both 90° elbows).
This will help with proper combustion by putting both terminations in
the same pressure zone.
Insert Bird Screen*
in End of 90 Elbow
Straps
Slope the
3" Min.
Insert Bird
Screen* in
End of
90 Elbow
12" over maximum
snow level
Roof
or 24", whichever
Flashing
is greater.
Firestop
•
As illustrated on the left, make sure to keep a distance of 3' (0.9m)
or wider between the intake and exhaust when installing the vent piping.
* If 3' (0.9m) distance between Intake and Exhaust cannot be ensured,
the installation can be carried out only in the installation method shown in page 17.
•
The PVT-HL termination may be used in place of elbows as the
horizontal vent terminations. It is not necessary to use bird screens
with the PVT-HL termination.
•
Terminate at least 12" (300mm) above grade or above snow line.
•
Slope the horizontal vent 1/4" upwards for every 12" (300mm)
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
instructions.
•
As illustrated on the left, make sure to keep a distance
of 3' (0.9m) or wider between the intake and exhaust
when installing the vent piping.
•
Terminate at least 6' (1.8m) from the combustion air
intake of any appliance, and 3' (0.9m) from any other
building opening, gas utility meter, service 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
8' (2.4m) from a vertical wall or similar obstruction,
terminate above the roof at least 2' (0.6m), but not
more than 6' (1.87m), in accordance with the National
Fuel Gas Code ANSI Z223.1/NFPA 54 or Natural Gas
and Propane Installation Code CSA B149.1.
•
Provide vertical support every 3' (0.9m) 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 12" (300mm) toward the
termination to drain condensate.
15