Noritz ecoTOUGH NRC98-DV-NG Installation Manual page 18

Vent Pipe Installation (When supplying combustion air from the indoors (SV, non-direct vent))
When installing this water heater in an area with a large amount of lint such as a commercial Laundromat,
direct-vent ("-DV") system must be used. The "-SV" configuration (using an SV conversion kit) is prohibited.
• Disconnect power and turn ON dip switch 3 if combustion air will be supplied from the
indoors as illustrated to the right. Refer to page 30 for the location of the dip switch bank.
• SV Conversion kit #SV-CK-3 is required for the air intake.
Failure to perform the above 2 steps could result in a fire or explosion causing
property damage, personal injury or death.
Refer to the instructions provided with the conversion kit for additional details.
Horizontal Vent Termination- PVC/CPVC Materials Only
Exhaust
Intake
SV Conversion Kit
Accessory
(#SV-CK-3)
Inlet screen
90 Elbow
Vertical Vent Termination- PVC/CPVC Materials Only
Exhaust
Intake
SV Conversion Kit
Accessory
(#SV-CK-3)
Inlet screen
90 Elbow
18
DANGER
WARNING
Hanger
Straps
Slope vent
Upwards
**1' (0.3m) Minimum
* Not supplied with water
heater, order separately.
**1' (0.3m) Minimum
recommended, but not required.
Insert Bird
Screen* in
End of 90
Elbow
Storm
Collar
Roof
Flashing
Firestop/Support
Support
Firestop
Hanger
Strap
Slope vent
Upwards
**1' (0.3m)
Minimum
* Not supplied with water
heater, order separately.
**1' (0.3m) minimum
recommended, but not required.
•
A tee, the PVT-HL termination may be used for the vent
3" Min.
termination. It is not necessary to use bird screens with
the PVT-HL termination.
Terminate at least 12" (300mm) above grade or above
•
snow line.
Terminate at least 7' (2.1m) above a public walkway,
Insert Bird •
Screen* in 6' (1.8m) from the combustion air intake of any appliance,
Each End
and 3' (0.9m) from any other building opening, gas utility
of Tee
meter, service regulator etc.
•
Terminate at least 3' (0.9m) above any forced air inlet within
10' (3m) , 4' (1.2m) below, 4' (1.2m) horizontallyfrom or
1' (0.3m) 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 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
in structions.
•
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.
• 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.
* Dip switch No.3 is turned on.