John Wood Takagi - 110-310-510 - Manual (Page 11)

11
Exhaust venting
(For the 110, 310, & 510 models)
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
(350°F). For best results, a vent system should be as short
and straight as possible.
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.
Follow the vent pipe manufacturer’s instructions when
installing the vent pipe.
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).
When the horizontal vent run exceeds 1.5m (5 ft.), sup-
port the vent run at 0.9m (3 ft.) intervals with overhead
hangars.
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.
Diameter
Max. No. of
Elbow
Max. Vertical &
Horizontal (Total) Vent
Length
76mm (3 in.) 5 15.24m (50 ft.)
* 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.)
Excludes elbow termination, rain caps, or the 76mm (3
in.) PVC Concentric Termination
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Venting Illustrations
(For the 110, 310, & 510 models)
For details of the optional items, refer to the Optional item
list.
Horizontal Installation Diagram:
Wall
Sidewall Vent
Terminator
Backfl ow
Preventer*
Vertical
Condensation
Drain**
Vertical Installation Diagram
Roof
Rain Cap
Backfl ow
Preventer*
Vertical
Condensation
Drain**
Roof Flashing