John Wood Noritz Concentric Vent - NR98-DVC (N-0751M) - Manual (Page 10)

10
Vent Terminal Installation Precautions
Note the following vent terminal installation requirements
• Do not install the vent terminal indoors
• Install the vent terminal with a downward slope
upward
slope
downward
slope
• Avoid storing hazardous
objects near the terminal
Gasoline
Gas
Vent terminal
Vent terminal
Snow
drift
Tree
• Avoid installing the terminal where obstacles
will block it
• Do not install the vent terminals vertically in-line. Do not cover
the vent terminal with any type of protective screen or enclosure.
In-line or blocked terminals can cause abnormal combustion
resulting in undesired performance from the water heater.
Vertical position not allowed.
8. Vent Pipe Installation
• This appliance requires the use of special concentric type vent pipe specified by Noritz America.
Do not attempt to use materials that are not specified for use on this appliance.
WARNING
Be sure to do
CARBON MONOXIDE POISONING
Follow all vent system requirements in accordance with relevant local or state regulation,
or, in the absence of local or state code, in the U.S. to the National Fuel Gas Code ANSI
Z233.1/NFPA 54 – latest edition, and in Canada, in accordance with NSCNGPI.
> 75mm (3")
(0.8"-3")
20-75mm < 20mm
(0.8")
• Install with the proper length protruding through the wall
Proper installation.
The red line can be
seen, but not more
than 55mm (2.2")
from the wall.
not far
enough too far
• Clearance from vent terminal.
If multiple units are installed, terminals must be separated
by 300mm (12") or more in a plain view regardless of the
vertical clearance.
Vent terminal Vent terminal
300mm (12") or more
300mm (12") or more