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Flue Termination VT4-TL, VT4-TS 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
• VT4-TS
• Vent terminal size variations are listed in the table below.
Choose the model according to the wall thickness required.
Model
VT4-TL-5
VT4-TL-8
VT4-TL-14
VT4-TL-27
42
not far
enough
Snow
drift
(for long vent runs)
(to be installed directly
on top of the appliance)
Wall thickness (in.)
90mm (3.5") to 130mm (5")
130mm (5") to 210mm (8")
210mm (8") to 370mm (15")
370mm (15") to 690mm (27")
• 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.
300mm (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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