W
W
T-KJr. Instantaneous Water Heater
Installation Manual and Owner’s Guide
Flash Water Heater™
Model T-KJr.
Suitable for potable water heating and space heating
FEATURING
• ENDLESS HOT WATER
• ON DEMAND
• COMPACT, SPACE SAVING
• ENERGY CONSERVING
• COMPUTER CONTROLS
• COMPUTERIZED SAFETY
• NO PILOT LIGHT
This product must be installed and
serviced by a licensed plumber, a
licensed gas fitter, or a professional
service technician and/or in accordance
with all local code. Improper installation
and/or operation, or installation by an
unqualified person, will void the warranty.
Operation of this unit creates carbon
monoxide gas and flue gases which can
cause serious injury or death. In addition,
if the information in this manual is not
followed exactly, a fire or explosion may
result causing property damage, personal
injury or death.
Takagi Industrial Co. USA Inc.
Irvine, CA 92618
Toll Free (888) 882-5244 USA
Toll Free (877) 877-4935 CANADA
www.Takagi.com
ARNING
ARNING
5 Whatney
CONTENTS
Specification …………. 2
SPECIFICATIONS
Natural Gas Input Min. 19,500 Btu
utB 000,041 .xaM
Introduction …………..3
For your safety …………..3-4
Installation …………. 5
General …………. 5
Accessories …………. 5
Outdoor Installation ………….5-6
Indoor Installation ………….6-7
Venting Instructions …………..7 -9
Gas Supply/Gas Pipe sizing………..10-11
Water Connection …………. 11-12
Electrical Connection …………. 13
Initial operation …………. 13
Normal operation …………. 14
Flow …………. 14
Temperature setting …………. 15
Freeze Protection Device …………. 15-16
Maintenance and Service …………..16-17
Error codes …………..17
For your Safety …………..18
LPG Input Min. 17,500 Btu
utB 000,041 .xaM
Gas Connection ¾” NPT
Water Connections ¾” NPT
Water Pressure Min. 15 psi
isp 051 .xaM
Natural Gas Pressure Inlet Min. 5.5” WC
CW ”5.01 .xaM
LP Gas Pressure Inlet Min. 9.5” WC
CW ”41 .xaM
Manifold Pressure Natural 3.2” WC
CW ”2.3 enaporP
.sbl 23 thgieW
Dimensions 20”x14”x6”
Ignition Electronic Ignition
Electrical Supply AC 120 V
*** NOTE ***
Danger …………..19
Check the rating plate to ensure this
product matches your specifications;
Application …………..20
Space Heating …………..20
Dual-purpose heating …………..21
Storage Tank …………..22
Re-Circulation …………..22
This appliance is certified for use at
altitudes from 0ft to 4500ft (1,370m) in
accordance to the latest CAN/CGA 2.17High Altitude Installation procedures at
normal manifold pressure 3.2" W.C.
(Natural Gas). Do not alter the orifice jets
Optional Items …………..23
or gas supply pressure. At altitudes of
4500ft to 5,000ft (1524m) lower the
Component Diagram …………24-25
manifold pressure to 2.9" W.C. (Natural
Gas). At 5000ft to 6000ft (1,829m), lower
Parts List …………..26
the manifold pressure to 2.7" W.C. (Natural
Gas). For elevations above 6000ft or for
Output temperature Chart …………..27
specific instructions on how to lower the
manifold pressure, please call the Takagi
office.
Manufacturer reserves the right to discontinue, or change at any time, specifications or
designs without notice and without incurring obligations.
2
INTRODUCTION
FOR YOUR SAFETY
This manual provides information necessary
for the installation, operation, and maintenance
of the Model T-KJR water heater. This unit
includes a fan enabling sidewall (power)
venting and an advanced electronic ignition
system.
The model description is listed on the rating
plate which is attached to the front cover of the
water heater. Please read all installation
instructions completely before installing this
product. If you have any problems or
questions regarding this equipment, consult
with Takagi or its local representative.
Experiences have shown that most operating
problems are caused by improper installation.
The T-KJR Water Heater is an instantaneous,
tankless water heater designed to supply
endless hot water to your entire household
and/or commercial facility utilizing total
efficiency. The principle behind the T-KJR
Water Heater is simple. Once you open a hot
water tap, water flows through the T-KJR
Water heater. Once a minimum of 0.75 GPM is
achieved, the flow sensor automatically
commands the computer to turn on the fan,
activate the electronic igniter and open the gas
valves. The computer monitors water
temperature, water flow rate and gas flow to
ensure that you get the right amount of hot
water at the correct hot water temperature.
After the burners are ignited, the “fire on” lamp
is lit. The computer will modulate the gas
supply valve and water flow. 0.75 gallons per
minute is required to turn the burners on; after
the burners are ignited, the flow rate can be
lowered to 0.6 gallons per minute to maintain
the heater on. It is advisable to open further
the cold tap rather than decreasing the hot tap
to adjust the water temperature. As long as
you have water, gas and electricity, you will get
an endless flow of hot water. Open a hot water
tap to turn on your water heater. Close the tap
to turn off your water heater.
The installer is responsible for the correct
installation of your Flash T-KJR Water
Heater. Installation and service must be
performed by a qualified installer (for
example, a licensed plumber or gas fitter)
otherwise the warranty by Takagi will be
void.
PLEASE READ THIS MANUAL CAREFULLY
AND FOLLOW ALL DIRECTIONS.
1. Follow all local codes, or in the absence of
local codes, follow the most recent edition
of the National Fuel Gas Code, ANSI
Z223.1/NFPA 54 in the USA or the
CAN/CSA B149.1 Natural Gas and
Propane Installation Code in Canada.
2. Properly ground the unit in accordance with
all local codes or in the absence of local
codes, with the National Electrical Codes,
ANSI/NFPA 70 in the USA or CSA
standard C22.1 Canada Electrical Code
Part 1 in Canada.
3. Carefully plan where you intend to install
your T-KJR Water Heater. Ensure that your
heater will have enough combustible air
and proper ventilation and locate your
heater where water leakage will not do
damage to surrounding areas. If there is a
possibility of water damage, install a
suitable drain pan under the unit which will
not restrict combustible airflow.
4. Check the rating plate for the correct gas
type, gas pressure, water pressure and
electrical rating. If this unit does not match
your requirements, do not install.
RATING
PLATE
5. If any problem should occur, turn off all hot
water taps and turn off the gas. Then call a
trained technician or the Gas Company or
the manufacturer.
3
6. WARNING: Do not disconnect the
t
electrical supply if the ambient temperature
will drop below freezing. The Freeze
Prevention Device only works if the unit
has electrical power. The Freeze
Prevention Device is rated for temperatures
down to 5º F ( -15º C ) in a wind free
environment. Refer to the section on
Winterizing and the Freeze Prevention
Device for more information. The Warranty
will not be covered if the heat exchanger is
damaged due to freezing.
7. WARNING: Water temperatures over
125ºF can cause severe burns instantly or
death from scalding. The water
temperature is set at 122ºF (50ºC) from the
factory to minimize any scalding risk.
Before bathing or showering always check
the water temperature.
8. WARNING: Do not use this appliance if
any part has been in contact with or been
immersed water. Immediately call a trained
technician to inspect and/or service the unit
if necessary.
9. WARNING: Do not store or use gasoline or
other flammables, vapors or liquids in the
vicinity of this appliance.
GENERAL
The T-KJR. Water Heater is an instantaneous,
tankless water heater designed to supply
endless hot water to your entire household
and/or commercial facility utilizing total
efficiency. The principle behind the T-KJR
Water Heater is simple. Once you open a hot
water tap, water flows through the T-KJR
Water heater. Once a minimum of 0.75 GPM is
achieved, the flow sensor automatically
commands the computer to turn on the fan,
activate the electronic igniter and open the gas
valves. The computer monitors water
temperature, water flow rate, and gas flow to
insure that you get the right amount of hot
water at the correct hot water temperature.
After the burners are ignited, the “fire on” lamp
is lit. The computer will modulate the gas
supply valve and water flow 0.75 gallons per
minute is required to turn the burners on; after
the burners are ignited, the flow rate can be
lowered to 0.6 gallons per minute to maintain
the heater on. It is advisable to increase the
cold tap rather than decreasing the hot tap to
adjust the water temperature. As long as you
have water, gas and electricity, you will get an
endless flow of hot water. Open a hot water tap
to turn on your water heater. Close the tap to
turn off your water heater.
10. WARNING: Do not reverse the water
and/or gas connections as this will damage
the gas valves and can cause severe injury
or death. Following the diagram below
when installing your water heater:
Cold In
Hot Ou
Gas
Thermistor
Flow
Sensor
4
INSTALLATION
Accessories
GENERAL
All gas water heaters require careful and
correct installation to ensure safe and efficient
operation. This manual must be followed
exactly. Read the “For Your Safety” section at
the beginning of this manual.
1. The gas regulator is preset at the factory;
it is computer controlled and should not
need adjustment.
2. Maintain proper space for servicing. Install
the unit so that it can be connected or
removed easily;
3. The electrical connection requires a
means for switching off the power supply;
4. If you will be installing the unit in a
contaminated area with a high level of
dust, sand, flour, aerosols or other
contaminants, they can become airborne
and enter and buildup within the fan and
burner causing damage to the unit. In
those environments, please purchase the
optional TK-TV09 direct vent conversion
kit and convert the T-KJR to a sealed
combustion unit. The warranty will not
cover damage caused to the unit due to
installation in a contaminated environment
that has not be converted using the TKTV09.
5. Particles from these objects may clog the
air vent or reduce the functions of the
rotating fan and cause improper burning
of the gas. Regular maintenance is
recommended for these types of
environment.
6. Do not install the unit where the exhaust
vent is pointing into any opening in a
building or where the noise may disturb
your neighbors. Make sure the vent
termination is 4 feet from a doorway or
opening to prevent exhaust from entering.
7. Some chemicals used in a beauty salon
may affect the flame sensor. Water heater
may not work properly. Please consult
with Takagi, when the water heater is
installed in a beauty salon.
8. Water hardness may affect the water
heater. Water heater may be damaged.
The warranty will not cover damage
caused by water quality.
9. When converted into a direct-vent unit, the
T-KJR is RADCO certified to be installed
in mobile homes and manufactured
homes.
Check that the installation manual, the
extension cable and the warranty card were
included with the unit.
OUTDOOR INSTALLATION
Follow all local codes, or in the absence of
local codes, follow the most recent edition of
the National Fuel Gas Code ANSI
Z223.1/NFPZ 54 in the USA or the CAN/CSA
B149.1 Natural gas and Propane Installation
Code in Canada.
Ensure that the unit is set for outdoor
installation. The ‘OUT’ dipswitch on the
computer board should be switched to its ‘ON’
(up) position:
Outdoor dip switch setting
The outdoor vent cap must be used when unit
is installed outdoor. Takagi recommends the
use of its part No. TK-TV04.
When installed outdoors, the T-KJR water
heater shall be wall mounted only. Locate the
water heater in an open, unroofed area and
maintain the following minimum clearances:
Outdoor Installation Service Clearances
Piping side (Bottom) 12”
Front (Maintenance space) 24”
Back of heater 1”
Sides of heater 6”
Top of heater 36”
5
WARNING: Do not install this water heater under
an overhang less than 3 feet from its top or eaves.
The area under an overhang must be open to three
sides.
WARNING: Do not have the vent terminal
pointing toward any opening into a building. Do
not locate your heater in a pit or location where
gas and water can accumulate.
WARNING: Do not install the heater where
water, debris or flammable vapors may get into
the flue terminal. This may cause damage to
the heater and void the warranty.
The diagram below details the required
clearances around the unit:
Combustion Air Supply
The water heater location must provide enough
air for proper combustion and ventilation of the
surrounding area. See the latest edition of
ANSI Standard Z223.1 or any applicable local
codes. In general, these requirements specify
that if the unit is installed in a confined space,
there must be a permanent air supply opening.
WARNING: Do not install the water heater
vent terminator within 4 feet in the USA of any
air intake or building opening, and with in 3 feet
in Canada of any air intake or building opening.
(Refer to Page.9)
INDOOR INSTALLATION
When installed indoors, the T-KJR water
heater shall be located in an area to maintain
the following minimum clearances around the
unit:
Indoor Installation Service Clearances
Piping side (Bottom) Min. 6”
Front (Maintenance space) Min 24”
Back of heater 1”
Sides of heater 2”
Top of heater 12"
Air Supply from Outside Building
When combustion air is supplied from outside
the building, an opening communicating
directly with the outside should have a
minimum free area of one square inch per
15,000 BTUH input of the total input rating of
water heater in the enclosed area.
Air Supply from Inside Building
When combustion air is supplied from inside
the building, an opening communicating with
the rest of the dwelling should have a minimum
free area of one square inch per 1000 BTUH
input of the total input rating of water heater in
the enclosed area. These openings should
never be less than 100 sq. in.
Minimum recommended air supply opening size
for water heater:
Water heater
size
When drawing
make-up air
from outside
the building
When drawing make-up
air from inside the
building (from other
rooms within)
Max. 140.000
6
6.2 Sq. IN 119 Sq. IN
BTU
Combustible Air Supplied by
Mechanical fan or Make up air device.
The T-KJR water heater is equipped with a
combustible air sensor that will shut off the unit
when inadequate combustible air supply to unit
is detected.
If a mechanical fan or make up air device is
used to supply air to the water heater or utility
room, the installer should make sure it does
not create drafts which could cause nuisance
shutdowns. If a blower is necessary to provide
adequate combustion air to the water heater, a
switch or equivalent device must be wired
(interlocked) with the water heater control
circuit or other proper devices to prevent the
water heater from firing unless the blower is
operating.
Direct intake vent system
This T-KJR water heater may be converted to
a direct vent (sealed combustion) appliance by
installing an adapter (part No TK-TV09) which
will bring all required combustible air from
outside the building. The T-KJR must be
installed in a location where the proper amount
of combustible air will be available to it at all
times without obstructions. If used as a direct
vent appliance, the T-KJR requires a 3”
combustible air supply pipe. The intake pipe
must be sealed airtight with aluminum tape and
can be made of ABS, galvanized steel,
corrugated aluminum, corrugated stainless
steel or Category III stainless steel.
T-KJr is not necessary to change the dip
switch setting.
VENTING INSTRUCTIONS
General
WARNING: Improper venting of this appliance
can result in excessive levels of carbon
monoxide which can result in severe personal
injury or death.
Exhaust Vent
This is a Category III appliance and must be
vented accordingly. The vent system must be
sealed air tight. All seams and joints must be
sealed with high heat resistant silicone sealant
or UL listed aluminum adhesive tape having a
minimum temperature rating of 350ºF. For best
results, a vent system should be as short and
straight as possible.
This unit requires 4”, Category III approved,
single wall stainless steel vent pipe or any
other Category III approved, non-combustible,
corrosion-resistant material. The following are
UL listed manufacturers: ProTech Systems Inc.
(FasNSeal), Flex-L Inc., Z-Flex Inc. (Z-Vent III)
and Heat-Fab Inc. (Saf-T Vent). Follow the
vent pipe manufacturer’s instructions when
installing the vent pipe. Do not common vent
this appliance with any other vented appliance.
The maximum length of exhaust vent piping
must not exceed 35 ft. deducting 5 ft. for each
elbow used in the venting system. Do not use
more than 3 elbows.
Diam
eter
4” 3 Ea. 35 ft
For each elbow added, deduct 5 ft. from
max. Vent length.
Horizontal Length
Max.
No. of
Elbow
No. of Elbows Max. Vertical or
Max. Vertical or
Horizontal run in
Length
0 35 ft.
1 30 ft.
2 25 ft.
3 20 ft.
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.
This water heater must be vented in
accordance with the section “Venting of
Equipment" of the latest edition of the Natural
Fuel Gas Code, ANSI Z223.1 and all
applicable local building codes. In Canada,
follow section 7 of the CAN/CSA B149.1
Natural Gas and Propane Installation Code.
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 terminal at a rate of ¼” per foot.
7
Vent Termination
p
g
A sidewall vent terminator must be used when
the water heater is vented through a sidewall.
Takagi recommends the use of its part No.TKTV01 or the TK-TV05 with the TK-TV09 when
using the direct vent option. 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 and flue gases
poisoning. Improper installation will void
product warranty. For high altitude installation
above 4,500 feet, contact Takagi on how to
handle this situation.
General rules for venting the T-KJR 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 long runs of the pipe.
Roof Flashin
Condensation drain
(Install according to
local code)
Rain ca
TK-TV03 (Back flow
prevention)
The exhaust
goes to the roof
Regarding the clearance from the
terminator to the air inlet or opening,
refer to the next page.
Install a condensation drain in the
venting.
Follow the vent system to vent
manufacture’s instruction and local
code.
Do not common vent or connect any
vent of appliance to the vent.
Use the 4” category III Vent pipe
approved, single wall stainless steel
vent pipe.
8
A.S.U adanaC
Direct vent and
other than Direct Vent
Clearance above grade, veranda, porch,
A
deck, or balcony.
Clearance to window or door that may be
B
opened.
Clearance to permanently closed window * * *
C
1 foot 1 foot 1 foot
3 feet 1 foot
Direct vent Other than Direct Vent
4 feet from below or
side opening. 1 foot
from above opening.
Vertical clearance to ventilated soffit located
above the vent terminator within a horizontal
D
distance of 2 feet (61cm) from the center
* * *
line of the terminator.
E
F
G
Clearance to each side of center line
H
extended above meter/regulator assembly
Clearance to service regulator vent outlet. 3 feet * *
I
Clearance to non-mechanical air supply inlet
to building or the combustion air inlet to any
J
other application.
Clearance to mechanical air supply inlet. 6 feet 3 feet 3 feet
K
Clearance above paved sidewalk or paved
L
driveway located on public property.
Clearance under veranda, porch deck, or
M
balcony.
3 feet * *
4 feet from below or
3 feet 1 foot
side opening. 1 foot
from above opening.
7 feet * 7 feet
1 foot * *
*For clearances not specified in ANSI Z223.1 / NFPA 54 or CAN/CSA-B149.1, please use clearances in
accordance with local installation codes and the requirement of the gas supplier.
* * * tiffos detalitnevnu ot ecnaraelC
* * * renroc edistuo ot ecnaraelC
* * * renroc edisni ot ecnaraelC
9
Loading...