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When installing the vent system, all applicable
national and local codes must be followed. If
you install thimbles, fire stops or other
protective devices and they penetrate any
combustible or noncombustible construction,
be sure to follow all applicable national and
local codes.
When the horizontal vent run exceeds 5 ft., the
following criteria must be observed:
•
Support the vent run at 3 ft intervals with
overhead hangers.
•
Slope the vent run downwards toward the
vent terminator at a rate of ¼" per foot.
Vent Termination
A sidewall vent terminator must be used when
the water heater is vented through a sidewall.
Takagi recommends the use of its part No.TK-
TV01. The vent terminator provides a means of
installing vent pipe through the building wall
and must be located in accordance with ANSI
Z223.1/NFPA 54, or in Canada with CAN/CSA-
B149.1 and local applicable codes.
Locate the vent terminator so that it cannot be
blocked by snow. Most codes require that the
terminator be at least 12 inches above grade,
but the installer may determine if it should be
higher depending on the job site condition and
applicable codes.
WARNING: Improper installation can cause
nausea or asphyxiation, severe injury or death
from
carbon
monoxide
poisoning.
Improper
product warranty. For high altitude installation
above 4,500 feet, contact Takagi on how to
handle this situation.
and
flue
gases
installation
will
void
General rules for venting the T-K2 water heater
are:
1. Place the water heater as close as possible
to the vent terminator;
2. The vent collar of the water heater must be
fastened directly to an unobstructed vent
pipe.
3. Do not weld the vent pipe to the water
heater collar.
4. The weight of the vent stack must not rest
on the water heater.
5. The vent must be easily removable from
the top of the water heater for normal
service and inspection of the unit.
6. The water heater vent must not be
connected to any other gas appliance or
vent stack.
7. Avoid locating the water heater vent
terminator near any air intake devices or
air-conditioning units. These fans can pick
up the exhaust flue products from the water
heater and return them to the building. This
can create a health hazard.
8. Avoid using an oversized vent pipe or using
extremely
- 8 -
long
runs
of
the
pipe.
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