John Wood Takagi - 710 - Manual (Page 7)

7
Direct vent
conversion kit
Inlet
Exhaust
Venting Connections
WARNING
Improper venting of this appliance can
result in excessive levels of carbon mon-
oxide which can result in severe personal
injury or death.
This water heater must be vented in accordance with
the section “Venting of Equipment" of the latest edition
of Section 7 of CSA B149.1 Natural Gas and Propane
Installation Code and all applicable local building codes.
Exhaust Vent
This is a Category III appliance and must be vented accord-
ingly. The vent system must be sealed air tight. All seams
and joints without gaskets must be sealed with high heat
resistant silicone sealant or UL listed aluminum adhe-
sive tape having a minimum temperature rating of 177°C
(350ºF). For best results, a vent system should be as short
and straight as possible.
1. This water heater is a Category III appliance and must be
vented accordingly with any 102mm (4 in.) vent approved
for use with Category III or Special BH type gas vent.
2. The manufacturer recommends the “T-Vent” line
manufactured by TAKAGI (Refer to the venting bro-
chure for details). However, the following are also UL
listed manufacturers: ProTech Systems Inc. (FasNSeal),
Flex-L Inc., Z-Flex Inc. (Z-Vent III), Metal-Fab Inc., and
Heat-Fab Inc. (Saf-T Vent).
3. Follow the vent pipe manufacturer’s instructions
when installing the vent pipe.
4. Do not common vent this appliance with any other
vented appliance (Do not terminate vent into a chimney.
If the vent must go through the chimney, the vent must
run all the way through the chimney with Category III
approved or Special BH vent pipe).
5. The maximum length of exhaust vent piping must not exceed
15.24m (50 ft.) deducting 1.5m (5 ft.) for each elbow used
in the venting system. Do not use more than 5 elbows.
*For each elbow added, deduct 1.5m (5 ft.) from max.
vent length.
No. of Elbows Max. Vertical or Horizontal Length
0 15.24m (50 ft.)
1 13.7m (45 ft.)
2 12.2m (40 ft.)
5 7.6m (25 ft.)
6. When the horizontal vent run exceeds 1.5m (5 ft.), sup-
port the vent run at 915m (3 ft.) intervals with overhead
hangers.
7. The manufacturer will not be responsible for any damage
to the water heater caused by condensation from the
vent. For vent runs longer than 1.5m (5 ft.), installation of
a condensate drain is recommended. Install the conden-
sate drain as close to the water heater as possible. For
horizontal runs, slope the vent run back toward the water
heater where the condensate drain is installed at a rate of
6.4mm (1/4 in.) per 305mm (1 ft.). Refer to pg. 8 for the
diagrams.
When installing the vent system, all appli-
cable national and local codes must be
followed. If you install thimbles, fire stops
or other protective devices and they pen-
etrate any combustible or noncombustible
construction, be sure to follow all appli-
cable national and local codes.
Vent Termination
WARNING
Improper installation can cause nausea or
asphyxiation, severe injury or death from
carbon monoxide and flue gases poison-
ing. Improper installation will void product
warranty.
• The vent terminator provides a means of installing vent
pipe through the building wall and must be located
in accordance with CSA-B149.1 and applicable local
codes.
• A proper sidewall vent terminator is recommended when
the water heater is vented through a sidewall. If the 710
is converted to a direct-vent unit, a proper sidewall direc-
tvent terminator, such as a concentric style terminator, is
to be used.