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T-K2
Installation Manual and Owner's Guide
Flash Water Heater
Model T-K2
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.
6 Goddard
Irvine, CA 92618
Toll Free (888) 882-5244
www.takagi-usa.com
Instantaneous Water Heater
FOR YOUR SAFETY
must be installed and serviced by a
professional
licensed person, qualified in water
heater installation. Operation creates
carbon monoxide gas and flue gases,
which can cause serious injury or
death.
operation,
unqualified person, will void warranty.
WARNING
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
appliance.
WHAT TO DO IF YOU SMELL GAS
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
- This product
service
technician
Improper
installation
or
installation
: If the information in this
of
this
or
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
location.
Follow
supplier's instructions.
If you cannot reach your gas
supplier,
call
department.
or
and/or
by
an
any
other
another
the
gas
the
fire
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Summary of Contents for Takagi T-K2
- Page 1 T-K2 Installation Manual and Owner’s Guide Flash Water Heater Model T-K2 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.
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Page 2: Table Of Contents
Table of Contents Specifications…………………………….. 2 For Your Safety…………………………... 3 Operation…………………………………. 4 General…………………………… Turning It On……………………… Turning It Off……………………… Temperature……………………… Flow……………………………….. Freeze Protection………………... Installation………………………………… 6 General…………………………… Accessories………………………. Electrical Connections…………... Wiring Diagrams…………………..7,8 Gas Supply Piping………………. Water Plumbing………………….. Pressure Relief Valve……………. Wall Hanging Installation………... Standing Installation……………... -
Page 3: For Your Safety
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 Installation... -
Page 4: Operation
2. Flow will diminish, unit will shut off. 3. “Fire On” lamp will go out. constant output Temperature The output temperature of the T-K2 has been factory set for a maximum 120 This computer and can be adjusted with a TK- RE01 temperature controller, or with the dipswitches on the computer board (See pgs. -
Page 5: Freeze Prevention
The flow rate through the T-K2 is limited to a maximum of 6.9 GPM. setting, along with the supply temperature of the water will determine the flow rate the unit puts out. Consult the flow charts on the last page of this manual to determine the possible outlet temperature and flow rate combinations. -
Page 6: Installation
Check that all the parts listed below were included with the unit. Electrical Connections The T-K2 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. -
Page 7: Wiring Diagrams
Refer to the following wiring diagrams. Wiring of the appliance. diagrams are also printed on the inside panel Wiring Diagrams Electrical Rating 120 VAC, 60 Hz, 0.8 A. Note : If any of the original wiring supplied with this appliance must be replaced, it must be replaced with appliance wiring material (180c) or its equivalent. -
Page 10: Gas Supply Piping
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 185,000 BTUH. determine the effective length of the gas supply line by measuring the actual length of piping, and then adding 5 ft. -
Page 11: Water Plumbing
Fixture Unit Per Fixture (from UPC) Plumbing Fixture Description Combination Bath / Shower Whirlpool Bath Shower Lavatory Clothes Washer Dishwasher Kitchen Sink Install with control valves on the inlet and... -
Page 12: Wall Hanging Installation
Wall Hanging Installation For a wall mount installation, use TK-BK01 brackets to securely attach the T-K2 to the wall. Locate the heater as desired, but follow all applicable local codes, as well as the indoor or outdoor clearances that installation. -
Page 13: Indoor Installation
Combustible Air Supply The T-K2 must be installed in a location where the proper amount of combustible air will be available to it at all times. installed in a confined space, there must be permanent openings supplying air to the unit. -
Page 14: Exhaust Venting
Exhaust Venting This water heater must 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 manufacturers: ProTech FasNSeal, Z-Flex Inc. -
Page 15: Initiating The Appliance
6. Turn the manual gas control valve located 7. Turn on the electrical power to the 8. Turn on any tap, and the T-K2 will initiate 9. If the appliance will not operate, follow the TURNING OFF THE GAS SUPPLY TO THE APPLIANCE Close the manual valve on the gas inlet line. -
Page 16: Space Heating Application
The FLASH T-K2 can be used for space heating as well as potable heating of hot water Toxic chemicals such as used for boiler treatments chemical, alcohol, glycerol and glycol group will not be introduced into the system when used for potable water and space heating. - Page 17 Dual-purpose hot water heating (Domestic and Heating): Domestic potable water Priority Control Devices: It has a capability to make priority system that can be used as a controller flow sensor, Aquastat, or electronic controller to controlling radiant, Hydro or baseboard heating equipments. Warning: Follow all local codes, or in the absence of local codes, follow the most recent edition of the National Standard Code, ANSI Z21.
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Page 18: For Your Safety Read Before Operating
FOR YOUR SAFETY READ BEFORE OPERATING WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. A. This water heater does not have a pilot. It is equipped with an ignition device that automatically lights the burner. - Page 19 Read and follow water heater warnings and instructions. If owner's manual is missing, contact the retailer or manufacturer. The outlet hot water temperature of the T-K2 water heater is factory set 120 F. WARNING: Use this heater at your own risk. The set outlet water temperature can cause severe burns instantly or death from scalds.
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Page 20: Applications
Recirc. Pump The maximum flow rate through the T-K2 is 6.9 GPM. If it is necessary to achieve higher flow rates for longer periods of time, then it can be installed in conjunction with a storage tank. A pump will be necessary to keep the water hot. -
Page 21: Maintenance
Water Isn’t Hot Enough The T-K2 can burn gas at a maximum input rate of 185,000 BTUH. This puts a limit on the possible output temperature and flow capabilities (See flow chart on the last page of this manual). If the water doesn’t seem hot enough, compare the flow and temperature that is being attained to the T-... -
Page 22: Computer Board
The T-K2 Will Not Initiate First check the flow rate through the unit. If the flow is not .75 GPM or greater, the unit will not initiate. Check the filter and the flow sensor for any debris or damage. Press the lower green button on the GFCI inside the unit. If the red light above it does not come on, then there is a problem with the electrical supply to the unit. -
Page 24: Tk-Tv01
The TK-TV04 Vent Cap is for outdoor installation with the T-K2 water heater. The cap is installed on the top of the unit, instead of connecting an exhaust vent. The cap will prevent any debris that might be in the environment from entering the unit and causing damage or a fire hazard, as well as preventing rain or other weather from entering the unit. -
Page 25: Indoor Ng Dipswitch Settings
T-K2 Dipswitch Temperature Settings In the following dipswitch diagrams, the direction in which the head of the dipswitch should be pointing is represented with black. Indoor NG Dipswitch Settings NG Indoor Temperature Settings 105° F 112° F Outdoor NG Dipswitch Settings NG Outdoor Temperature Settings 105°... -
Page 26: Indoor Lp Dipswitch Settings
Indoor LP Dipswitch Settings 105° F 112° F Outdoor LP Dipswitch Settings LP Outdoor Temperature Settings 105° F 112° F LP Indoor Temperature Settings 120° F 120° F 180° F ERROR 180° F ERROR... - Page 27 Computer board assembly...
- Page 28 Case assembly...
- Page 29 Burner assembly...
- Page 30 Water way assembly...
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Page 31: Parts List
CASE ASSEMBLY BACK GUARD PANEL ASSEMBLY FRONT COVER FIXING PLATE TRANSFORMER JUNCTION BOX JUNCTION BOX COVER SCREW SCREW (COATED) 10 SCREW 11 SCREW 12 SILICON RING 13 HEAT EXCHANGER ASSEMBLY 14 HEAT EXCHNAGER FIXING PLATE (BACK) 15 HEAT EXCHANGER FIXING PLATE (FRONT) 16 SCREW 17 HI-LIMIT SWITCH 18 SCREW... - Page 32 Flow Rate vs. Temperature Hot Water Out GPM vs. Output Temperature for Various Input Temperature 40 F 50 F 60 F 70 F Output Temperature...
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