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Vent Terminal Installation Precautions
Note the following vent terminal installation requirements
• Do not install the vent terminal indoors
• Install with the proper length protruding through the wall
Proper installation. The
red line can be seen,but
the red rectangle cannot
be seen from the outside.
• Avoid installing the terminal where obstacles will block it
Vent terminal
• Do not cover the vent terminal with any type of
protective screen or enclosure. Blocked terminals
can cause abnormal combustion resulting in
undesired performance from the water heater.
Vent terminal models
• Use only the following models of Noritz
vent terminals with this unit.
• VT4-TL
(for long vent runs)
(to be installed directly
• VT4-TS
on top of the appliance)
• Vent terminal size variations are listed in the table below.
Choose the model according to the wall thickness required.
Model
VT4-TL-5
90mm (3.5") to 130mm (5")
VT4-TL-8
130mm (5") to 210mm (8")
VT4-TL-14
210mm (8") to 370mm (15")
VT4-TL-27
370mm (15") to 690mm (27")
not far
enough
Snow
drift
Wall thickness (in.)
• Install the vent terminal with a downward slope
downward
slope
too far
• Clearance from vent terminal.
If multiple units are installed, terminals
Vent terminal
must be separated by a minimum of
either 300mm (12") horizontally or
1.5m (60") vertically.
300 (12") or more
Tree
Vent terminal
Vent system installation example
Elbows
Intake pipe
Use a listed Category III vent adapter
to connect the flue collar to the vent
system. Use Category III vent pipe
for the entire length of the exhaust
pipe.
upward
slope
• Avoid storing hazardous
objects near the terminal
Gasoline
Vent terminal
Vent terminal
Straight pipe
Exhaust
pipe
Elbow
Main unit
Gas
1.5m
(60") or
more
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