Whirlpool T-K1S User Manual
T-K1S Instantaneous Water Heater
Installation Manual and Owner’s Guide
Flash Water Heater
Model T-K1S
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
Takagi Industrial Co. USA Inc.
3-B Goodyear
Irvine, CA 92618
Toll Free (888) 882-5244
www.takagi-usa.com
FOR YOUR SAFETY
This product must be installed by a
Professional Service Technician,
Licensed Plumber or Gas Fitter when
installed in the Commonwealth of
Massachusetts and/or any other state.
Warning
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.
WARNING: If the information in this
manual is not followed exactly, a fire or
explosion may result, causing property
damage, personal injury or death.
• Do not store or use gasoline or other
flammable vapors or liquids in the
vicinity of this or any other appliance.
• WHAT TO DO IF YOU SMELL GAS
• Do not use any appliance.
•
Do not touch any electrical
switch, do not use any phone
in your building.
•
Immediately contact your gas
supplier from another location.
Follow the gas supplier’s
instructions.
•
If you cannot reach your gas
supplier, call the fire
department.
• Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
Table of Contents
Specifications…………………………….. 1
For Your Safety…………………………... 2
Operation…………………………………. 3
General…………………………… 3
Turning It On……………………… 3
Turning It Off……………………… 3
Temperature……………………… 3
Flow……………………………….. 3-4
Freeze Protection………………... 4
Installation………………………………… 5
General…………………………… 5
Accessories………………………. 5
Electrical Connections…………... 5
Wiring diagram ……………….. 6
Gas Supply Piping………………. 7
Water Plumbing………………….. 8
Pressure Relief Valve……………. 8
Wall Hanging Installation………... 9
Standing Installation……………... 9
Outdoor Installation……………… 9-10
Indoor Installation………………... 10-11
Combustible Air Supply…. 10
Exhaust Venting…………. 11
Manufactured Home (Mobile Home)
Installation……………….………... 11
Indoor……………………… 11
Outdoor……………………. 11
Initiating the Appliance…………... 12
Initial Operation…………………... 12
Space Heating Application……….. 13
Dual Purpose Heating……………. 14
Applications………………………. 15
Storage Tank……………... 15
Recirculation……………… 15
Before Operating………………….. 16
Danger……………………………… 17
Maintenance……………………………… 18
Troubleshooting………………………….. 18-19
Optional Items……………………………. 20
TK-RE01………………………….. 20
TK-BK01………………………….. 20
TK-TV01…………………………... 20
TK-TV03…………………………... 20
TK-TV04…………………………… 20
Parts Diagram …………………………… 21-22
Parts List ……………………………….. 23
Flow Chart……………………………….. 24
Specifications
Natural Gas Input Min. 15,000 Btu
Max. 190,000 Btu
LPG Input Min. 17,000 Btu
Max. 190,000 Btu
Gas Connection ¾” NPT
Water Connections ¾” NPT
Water Pressure Min. 15 psi
Max. 150 psi
Natural Gas Pressure Inlet Min. 5” WC
Max. 10.5” WC
LP Gas Pressure Inlet Min. 11” WC
Max. 14” WC
Manifold Pressure Natural 2.9” WC
Propane 3.5” WC
Weight 45 lbs.
Dimensions 24” x 16.5” x 8”
Ignition Electronic Ignition
Electrical Supply AC 120 V
***
• Inlet gas pressure must not exceed the
above maximum values.
• For gas pressures lower than 5” WC for
natural gas, call the manufacturer.
• Before installing in areas over 4,500 feet
above sea level, contact the manufacturer
for high altitude adjustment instructions.
• Check the rating plate to insure this
product matches your specifications.
• Takagi - USA is constantly improving our
products therefore specifications are
subject to change without prior notice.
1
For Your Safety
PLEASE READ THIS MANUAL CAREFULLY
AND FOLLOW IT EXACTLY FOR YOUR
SAFETY.
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 USA or the CGA standard,
CAN/CGA B149.1 or .2 Installation Codes for
Gas Burning Appliances 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 to install your Flash
Water Heater. Insure that your heater will have
enough combustible air, 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. Do not install this unit if these
requirements can’t be met.
WARNING: Do not disconnect the electrical
6.
supply if the temperatures will be near
freezing. The Freeze Prevention Device will
only work if the unit has proper electrical
power. The Freeze Prevention Device is rated
for temperatures down to 5º F (-15º C) in a
wind free environment. The wind chill factor will
cause the Flash Water Heater to freeze and be
damaged at temperatures above 5º F (-15º C).
Refer to the sections on Winterizing and the
Freeze Prevention Device for more
information.
7.
WARNING: Before bathing or showering
always check the water temperature. Do not
leave children or the infirm unsupervised in the
shower or bath. The water temperature is set
at 120º F (50º C) from the factory to maximize
the amount of hot water you can use. Water
temperature over 125º F can cause severe
burns instantly or death from scalds.
8.
WARNING: Do not use this appliance if any
part has been underwater. Immediately call a
certified and trained technician to inspect and
service the unit if necessary.
9.
WARNING: Do not store or use gasoline or
other flammable vapors or liquids in the vicinity
of this or any other appliance.
10.
WARNING: Do not reverse the water and gas
connections, this will damage your heater and
can cause severe injury or death from scalds.
Follow the diagram below when installing your
Flash water heater.
5. If a problem should occur, turn off all hot water
taps and turn off the gas. Call a trained
technician, the Gas Company, or the
manufacturer.
2
Operation
General
The Flash Water Heater is an instantaneous,
tankless water heater designed to efficiently supply
domestic or commercial hot water. The principle
behind the Flash water heater is simple: Once a
hot water tap is opened, the Flash’s flow sensor
detects that hot water is needed, and automatically
commands the computer to electronically ignite the
burners, and heat water. During operation, the
computer monitors the water temperature and flow
rate, and controls the gas flow and fan speed to
maintain a constant output temperature. After the
burners are ignited the “fire on” lamp will be lit.
0.75 gallons per minute is required to turn the
burners on, but after the burners are ignited, the
flow rate can drop to 0.60 gallons per minute
without the burners turning off.
As long as water, gas and electricity are
connected, there will be an endless flow of hot
water. To turn on your water heater, just open a
tap. To turn the heater off, just close the tap.
Turning It On
To turn on the Flash water heater
1. Open a hot water tap, or turn on water
demanding appliance.
2. Unit will detect flow, burners will ignite, “Fire
On” lamp will light up on the computer.
3. If necessary, mix in cold water to get a
comfortable temperature.
Turning It Off
To turn off the Flash water heater
1. Close the hot water tap, or turn appliance off.
2. Flow will diminish, unit will shut off.
3. “Fire On” lamp will go out.
Temperature
The output temperature of the T-K1S has been
factory set for a maximum 120° F (50° C). This is
electronically controlled by the computer and can
be adjusted with a TK-RE01 temperature
controller. Further adjustment may be made by
mixing in cold water with the hot to obtain the ideal
water temperature.
The flow rate possible out of the unit is dependent
on the temperature setting chosen. Consult the
flow charts on the last page of this unit to
determine the possible outlet temperature and flow
rate combinations.
WARNING: Temperatures above 125º F (52º C)
can cause severe burns or death from scalding.
Children, the disabled and the elderly are at a high
risk of being injured. Feel the water temperature
before bathing or showering. Do not leave
children, disabled persons, or the elderly
unsupervised.
Flow
The flow rate through the T-K1S is limited to a
maximum of 7.5 GPM. The temperature setting,
along with the supply temperature of the water will
determine the flow rate the unit puts out. Consult
3
the flow charts on the last page of this manual to
determine the possible outlet temperature and flow
rate combinations. Based on the United States
Department of Energy method of testing water
heater output, the T-K1S is rated for 242 gallons
per hour, or 4.0 GPM, at a 77° F rise above the
inlet temperature. Refer to the following chart of
typical household flow rates to determine what the
T-K1S can do in a household application.
Remember that for bathing, cold water will be
mixed for a comfortable
temperature, increasing
the flow output rate.
Household Flow Rates
Appliance / Use
Lavatory Faucet 1.0
Bath Tub 4.0
Shower 2.0
Kitchen Sink 1.5
Dishwasher 1.5
Washing Machine 2.0
Taken from UPC 1997
Flow Rate
(GPM)
Freeze Prevention
This unit comes equipped with heaters that
discourage the unit from freezing. For this freeze
prevention system to operate there has to be
electrical power to the unit.
The freeze prevention devices will not work if the
electrical power source is disconnected. The unit
has been rated for temperatures down to 5º F (-15º
C) in a wind free environment. The wind chill factor
will cause the unit to freeze at temperatures above
5º F (-15º C), even if the unit is installed indoors.
For indoor installation in areas where the
temperature will be well below freezing for
extended periods of time, use the “thermostat
extension cable” to relocate the internal thermostat
located on the fan motor to the outdoors. This will
sense the ambient air temperature and turn the
internal heater blocks on to prevent the heat
exchanger from freezing.
For further protection install a TK-TV03 backflow
prevention kit so that cold air will not backflow into
the flue and cause the unit to freeze. Do not install
the water heater in an area with extremely cold
weather. This will void your warranty and Takagi
Industrial Co. USA Inc. will not be responsible for
any damage that occurs.
WARNING: The pipe heaters are located on the
Flash Water Heater only. Any hot or cold water
pipes located outside of the unit will not be
protected. Properly protect and insulate these
pipes from freezing.
If the heater will not be in use for a long period of
time or if the temperatures will drop below 5º F (15º C) with the wind chill factor, turn off heater and
drain the unit of water. This applies to indoor and
outdoor installations. This will keep the unit from
freezing and being damaged.
Follow these instructions carefully:
1. Turn off the power supply to the Flash Water
Heater.
2. Close manual gas control valve.
3. Close manual water shut off valve.
4. Open all hot water taps in the house.
(Bathroom, kitchen, laundry room, etc.). When
the water flow has ceased, close all hot water
taps.
5. Have a bucket to catch the water from the
unit’s drain plugs. Remove the drain plugs to
drain the water out of the unit.
6. Let drain for 5 minutes.
7. Securely screw the drain plugs back into place.
Follow these steps when it is again safe to use the
water heater:
1. Make sure all hot water taps are closed and
the drain plugs are securely attached.
2. Purge the water line of debris.
3. Open manual water control valve located on
the water supply line.
4. Open all the hot water taps to verify water
flows to the taps. Close hot water taps.
5. Open manual gas control valve located on the
gas supply line.
6. Turn on the power supply to the Flash Water
Heater.
4
Installation
This section is for the installer. The installer
is responsible for the correct installation of
your Flash Water Heater.
For Your Safety
Only a certified and trained service
technician or qualified plumber may service
or install your product.
Please keep this owner’s manual in a safe
place for future reference. Copies of this
manual are available from TAKAGI-USA
General
All gas water heaters require careful and correct
installation to ensure safe and efficient operation.
This manual must be followed exactly.
1. Read the For Your Safety section in the
beginning of this manual.
2. This unit is not capable of being used as a pool
or spa heater.
3. The regulator is preset at the factory. It is
computer controlled and should not need
adjustment.
4. Suitable for potable water heating only. Well
water or hard water may cause scale problems
that will not be covered by the manufacturer’s
warranty.
5. Maintain proper space for servicing. Install the
unit so that it can be connected or removed
easily.
6. Install so that the electrical power can be
switched off if necessary.
7. Avoid installing in an area with high levels of
dust, sand or debris. Particles may clog the air
vent, reduce fan function, or cause improper
combustion.
8. 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.
Accessories
Check that all the parts listed below were included
with the unit.
Electrical Connections
The T-K1S requires a 60 Hz 120 VAC electrical
power supply, and it should be properly grounded
in accordance with the most recent edition of the
National Electrical Code, ANSI/NFPA 70 and any
local codes. In Canada, all electrical wiring to the
heater should be installed in accordance with the
Canadian Electrical Code, CSA C22.1 Part 1, and
any local codes. Do not rely on the gas or water
piping to ground the metal parts of the heater.
CAUTION: Label all wires prior to disconnection
when servicing controls. Wiring error can cause
improper and dangerous operation. Verify proper
operation after servicing.
• A means for switching off the 120 VAC power
supply must be provided.
• Wire the heater exactly as shown in the wiring
diagram.
• A green screw is provided in the junction box
for the grounding connection.
5
Wiring Diagram
6
Gas Supply Piping
Check the rating plate to make sure that the unit
was built for the type of gas available in the area.
The gas supply piping should be sized according
to the Applicable Plumbing Code for a maximum
draw of 190,000 BTUH. First determine the
effective length of the gas supply line by
measuring the actual length of piping, and then
adding 5 ft. for every elbow or “Tee” to the actual
length. Use the charts below to determine the pipe
diameter necessary to accommodate the BTU
demand of the unit. If there are more than one gas
drawing appliances on the line, size according to
the maximum amount of BTU demand. The gas
supply pressures must be within the ranges of the
following chart:
Natural Gas
Supply Pressure
Propane Gas
Supply Pressure
Insufficient gas supply pressure can cause the
Flash Water Heater to lose efficiency or not work
at all.
Min. 5” WC
Max. 10.5” WC
Min. 11” WC
Max. 14” WC
WARNING: Fire or explosion may result if the
maximum supply pressures are exceeded. The
manifold gas pressure should be at maximum 2.6”
WC for natural gas, and 3.4” WC for propane.
Always use approved connectors to connect the
unit to the gas line. Always purge the gas line of
any debris before connecting to the water heater.
WARNING: Conversion of this unit from natural
gas to propane or propane to natural gas cannot
be done in the field. Contact your local retailer or
distributor to get the correct unit for your gas type.
Always install a manual shutoff valve on the gas
supply line in case of an emergency, or if service
or maintenance is necessary.
This appliance and its individual shut-off valve
must be isolated from the gas supply piping
system by unplugging the unit and turning off the
main gas valve during any pressure testing of the
gas supply piping system at test pressures equal
to or less than ½ PSI.
When all of the connections have been made,
check the gas line for leaks. Apply soapy water to
all gas fittings and connections, if bubbles form,
there may be a leak.
Natural Gas Supply Piping
Based on 0.60 specific gravity for natural gas at .5” WC pressure drop
DOE standard is 1100 BTU per cubic ft. of natural gas
Pipe
Size
Length 10’ 20’ 30’ 40’ 50’ 60’ 70’ 80’ 90’ 100’ 125’ 150’ 200’
½” 174 119 96 82 73 66 61 56 53 50 44 40 34
¾” 363 249 200 171 152 138 127 118 111 104 93 84 72
1” 684 470 377 323 286 259 239 222 208 197 174 158 135
1 ¼” 1404 965 775 663 588 532 490 456 428 404 358 324 278
1 ½” 2103 1445 1161 993 880 798 734 683 641 605 536 486 416
2” 4050 2784 2235 1913 1696 1536 1413 1315 1234 1165 1033 936 801
Cubic Feet of Natural Gas
Propane Supply Piping
Based on 11” WC supply pressure
Pipe
Size
Length 10’ 20’ 30’ 40’ 50’ 60’ 70’ 80’ 90’ 100’ 125’ 150’ 200’
½” 275 189 152 129 114 103 96 89 83 78 69 63 55
¾” 567 393 315 267 237 217 196 185 173 162 146 132 112
1” 1071 732 590 504 448 409 378 346 322 307 275 252 213
1 ¼” 2205 1496 1212 1039 913 834 771 724 677 630 567 511 440
1 ½” 3307 2299 1858 1559 1417 1275 1181 1086 1023 976 866 787 675
2” 6221 4331 3465 2992 2646 2394 2205 2047 1921 1811 1606 1496 1260
kBTU of Propane
7
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