Noritz ecoTOUGH NRC98-DV Installation Manual page 17

Vent Pipe Installation (When supplying combustion air from the indoors (SV, non-direct vent))
• Disconnect power and turn ON dip switch 3 if combustion air will be
supplied form the indoors as illustrated to the right. Refer to page 29 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 ¿ re 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
Slope vent
Intake
SV Conversion Kit
Accessory
(#SV-CK-3)
**1' (0.3m) Minimum
Bird screen
90 Elbow
* Not supplied with water
heater, order separately.
**1' (0.3m) Minimum
recommended, but not required.
Pipe Material
Max. Straight Vent Length
No. of Elbows 4" (100mm) Pipe
4 35' (10.8m)
3 41' (12.6m)
2 47' (14.4m)
1 53' (16.2m)
*** Not including the termination.
Vertical Vent Termination- PVC/CPVC Materials Only
Support
Exhaust
Intake
SV Conversion Kit
Accessory
Slope vent
(#SV-CK-3)
Upwards
Bird screen
**1' (0.3m)
Minimum
90 Elbow
* Not supplied with water
**1' (0.3m) minimum
WARNING
Hanger
Straps
Insert Bird
Upwards
Screen* in
Each End
of Tee
PVC or CPVC
***
3" (75mm) Pipe
35' (10.8m)
41' (12.6m)
47' (14.4m)
53' (16.2m)
Insert Bird
Screen* in
End of 45
Elbow
Storm
Collar
Roof
Flashing
Firestop/Support
Firestop
Hanger
Strap
heater, order separately.
recommended, but not required.
•
A tee, 45 elbow, or the PVT-HL termination may be used
for the vent 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,
•
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.
•
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.
•
When installed in a manufactured home, all combustion air
must be supplied from the outdoors as shown on pages 15 - 16.
• 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.
When installed in a manufactured home, all combustion air
•
must be supplied from the outdoors as shown on page 15.
* Dip switch No.3 is turned on.
17