T H2 Dv Installation - Takagi T-H2-DV Installation Manual And Owner's Manual

T H2 DV is equipped with a thermistor and hi limit switch for the exhaust gas, detecting excess
temperatures within the flue and enabling the unit to safely stop operations if needed. These
components are always monitoring exhaust gas conditions in order to prevent heat damage to PVC
(Plastic) venting if PVC is used.
If the exhaust gas temperature exceeds 140°F, these components will enable the unit to safely stop
operations. (For the T H2 OS model, these components are not available since there's no exhaust
venting required.)
x
T H2 DV requires a 4" make up intake air supply
pipe. The intake pipe must be sealed airtight.
x
Air supply pipe can be made of ABS, PVC,
galvanized steel, corrugated stainless steel,
or Category lll / IV stainless steel.
x
Sidewall venting is recommended for
the T H2 DV. Vertical venting (roof
termination) is acceptable.
x
TAKAGI recommends running the
exhaust vent and the intake pipe as
parallel as possible.
x
The TH PA01 adaptor is used to make
the connection between the T H2 DV
vent collar and PVC vent pipe easier
and for maintenance purposes.
Improper venting of this appliance can result in excessive levels of carbon monoxide
which can result in severe personal injury or death.
WARNING
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.
The T H2 DV must be vented in accordance with the section "Venting of Equipment" of the latest edition
of the National Fuel Gas Code: ANSI Z223.1/NFPA 54 in the United States and/or Section 7 of the
CAN/CSA B159.1 Natural Gas and Propane Installation Code in Canada, as well as applicable local
building codes.
The use of venting materials approved for Category III/IV appliances is recommended whenever possible.
However, T H2 DV may also be vented with plastic pipe materials such as PVC. For details, please refer
to the Exhaust Vent (PVC Vent) section on p. 11. Vent installations in Canada which utilize plastic vent
systems must use venting that complies with ULC S636.

T H2 DV INSTALLATION

(24" Recommended
for Maintenance)
VENTING INSTRUCTIONS
General
10
Page
Side 3"
Front 4"
Bottom 12"
Keep the clearances.
Installation
Top 12"
Back 0.5"
Side 3"