John Wood Noritz Condensing - N-0841MC - Manuel (Page 48)

48
Model Wall thickness (in.)
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")
Main unit
Straight 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.
Vent Terminal Installation Precautions
Note the following vent terminal installation requirements
• Install with the proper length protruding through the wall
• Avoid storing hazardous
objects near the terminal
Gasoline
Gas Proper installation. The
red line can be seen,but
the red rectangle cannot
be seen from the outside.
Vent terminal
Vent terminal
not far
enough too far
Snow
drift
Tree
• Avoid installing the terminal where obstacles will block it
• 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
Elbows
Elbow
Vent terminal
sloping down
Intake pipe
Exhaust
pipe
Vent system installation example Vent terminal models
• Use only the following models of Noritz
vent terminals with this unit.
• VT4-TL
• VT4-TS
(for long vent runs)
(to be installed directly
on top of the appliance)
Vent terminal
• Vent terminal size variations are listed in the table below.
Choose the model according to the wall thickness required.
• 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.