Wall Hanging Installation; Standing Installation; Installation; Ventilation - Takagi Flash Water Heater T-KD20 Installation Manual And Owner's Manual

System Installation
Warning: Installation or service of this water
heater requires licensed person or qualified
professional service technician in water heater
installation. Operation creates carbon monoxide
gas and flue gases, which can cause serious injury
or death. Improper installation and/or operation, or
installation by an unqualified person, will void
warranty.
Indoor Clearances
Piping side
Front (Maintenance
space)
Back of heater
Non piping side
Top of heater

Wall Hanging Installation

For a wall mount installation, use TK-BK01
brackets to securely attach the T-KD20 to the wall.
Locate the heater as desired, but follow all
applicable local codes, as well as the indoor or
outdoor clearances that apply to the installation.

Standing Installation

If the unit is to be installed standing on a surface,
adjust the legs so that the unit stands securely and
is level (legs can be adjusted up to 1").
Use the included L brackets to connect the unit to
a wall to ensure that it does not fall over. These
brackets will secure between the back of the unit
and wall surface.
Combustion Air and Ventilation
Follow all local codes, or in the absence of local
codes, follow the codes for Installation of Gas
Burning Appliances: National Fuel Gas Code ANSI
6"
Suggested 24"
Min. 4"
1"
Min. 0.5"
12"
Z221.23 in USA or CAN/CGA B149.1 or .2 in
Canada.
Exhaust Venting
WARNING: The T-KD20 must be connected to a
Category III gas vent for discharge pipe in order to
direct the dangerous exhaust byproducts to the
outdoors.
Connect the 4" Category III vent pipe to the
minimum 2" round collar on through the outside
wall.
This water heater must be vented in accordance
with the section on venting of equipment in the
latest edition of the National Fuel Gas Code.
This is a Category III appliance, and must be
vented accordingly. The following are UL listed or
CSA certified manufacturers: ProTech Systems
FasNSeal, Z-Flex Inc. Z-Vent II. Heat-Fab Inc. Saf-
T Vent and Flex-L. This unit requires 4" vent pipe.
Connect the vent pipe to the unit so that it is
sealed airtight.
manufacturer's instructions when installing the
vent pipe. Do not common vent this appliance with
any other vented appliance.
The venting system must not exceed a length of
25 ft. minus 5 ft. for every elbow. Do not use more
than 3 elbows.
No. of Elbows
0
1
2
3
If the horizontal vent run exceeds 5 ft., the
following criteria must be observed:
•
There must be a 1 ft. vertical run off the top
of the heater before the horizontal run
begins.
•
The horizontal run must be supported at 3'
intervals.
•
The vent run should be pitched up towards
the termination at ¼" per foot.
The unit should be vented out to directly through a
wall. If the unit will be vented through a wall, use
Takagi USA Inc. optional part, the TK-TV05 vent
terminator, or an equal vent terminator that
approved by UL or CSA.
terminator according to ANSI Z223.1/NFPA 54 and
applicable local codes.
11
Follow the vent
Max. Vertical or
Horizontal Length
25 ft.
20 ft.
15 ft.
10 ft.
Locate the vent
pipe