Instructions / Assembly

21
V
ertical Vent Termination
Horizontal Vent Termination
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A tee, 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.
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.
Terminate at least 3’ (0.9m) from the combustion air intake
of any appliance and any other building opening.
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.
Hanger
Straps
Slope the
Vent Upward
Insert Bird Screen* in
End of Termination
* Not supplied with
water heater,
order separately.
ۺ
3". Min.
** 1' Minimum
** 1' Minimum recommended,
but not required.
Intake
Exhaust
2" (50mm)
or
3" (75mm)
SV Conversion Kit
Accessory
(SV-CK-2)
Inlet Screen
Slope the Vent
Upward
Hanger
Straps
Firestop
Support
Firestop / Support
Storm
Collar
Roof
Flashing
12" over
maximum
snow level
Insert Bird Screen* in
End of 90° Elbow
** 1' Minimum
* Not supplied with water heater,
order separately.
** 1' Minimum recommended,
but not required.
Intake
SV Conversion Kit
Accessory
(SV-CK-2)
Inlet Screen
Exhaust
2" (50mm)
or
3" (75mm)
Vent Pipe Installation (When supplying combustion air from the indoors (SV, non-direct vent))
* Dip switch No.3 is turned on.
• 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 28 for the location of the dip switch bank.
• SV Conversion kit SV-CK-2 is required for the air intake.
• Noritz recommends to install a Carbon Monoxide Alarm in installation site of the unit when
supplying combustion air from the indoors.
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.
WARNING
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" conguration (using SV conversion kit) is prohibited.
When installing this water heater in a mobile home, all combustion must be drawn directly from the outdoors.
The "-SV" conguration (using SV conversion kit) is prohibited.
DANGER