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Takagi Flash Water Heater T-KJr, Installation Manual And Owner'S Manual, Page: 24 / 28

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Takagi Flash Water Heater T-KJr Installation Manual And Owner'S Manual Download Page 24

 

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Component Diagram 

Case

Heat 
Exchanger

Computer 

Summary of Contents for Flash Water Heater T-KJr

Page 1: ...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 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 CO...

Page 2: ...l Gas Pressure Inlet Min 5 5 WC C W 5 0 1 x a M LP Gas Pressure Inlet Min 9 5 WC C W 4 1 x a M Manifold Pressure Natural 3 2 WC C W 2 3 e n a p o r P s b l 2 3 t h g i e W Dimensions 20 x14 x6 Ignition Electronic Ignition Electrical Supply AC 120 V NOTE Check the rating plate to ensure this product matches your specifications This appliance is certified for use at altitudes from 0ft to 4500ft 1 37...

Page 3: ...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 FOR YOUR SAFETY PLEASE READ THIS MANUAL CAREFULLY AND FOLLOW ALL DIRECTIONS 1 Follow all local codes or...

Page 4: ... Following the diagram below when installing your water heater 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 7...

Page 5: ...e 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 w...

Page 6: ...red 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 Air Supply from Outside B...

Page 7: ... 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 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 alu...

Page 8: ...ossible 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 conne...

Page 9: ...o t e c n a r a e l C G r e n r o c e d i s n i o t e c n a r a e l C H Clearance to each side of center line extended above meter regulator assembly 3 feet I Clearance to service regulator vent outlet 3 feet J Clearance to non mechanical air supply inlet to building or the combustion air inlet to any other application 3 feet 1 foot 4 feet from below or side opening 1 foot from above opening K Cle...

Page 10: ...efore connecting to the heater gas inlet Pipe Sizing Example This table below is for Natural gas piping supply straight to the water heater without any tabs to other gas appliances Recommend Gas pipe size for T KJR Water Heater Example for NG Distance from Gas Meter Pipe Size inches 0 60 3 4 60 150 1 150 300 1 1 4 1 Turn off all electric power to the water heater if service is to be performed 2 Tu...

Page 11: ...ch as one having an anti backflow device in the cold water supply line a thermal expansion tank must be installed Contact the water supplier or local plumbing inspector on how to control this situation After installation of the water heater is complete purge the water line to remove all the debris and air from the line Failure to do so may cause damage to the heater There is a wire mesh filter wit...

Page 12: ...alve is required This unit does not come with an approved pressure relief valve An approved pressure relief valve must be installed on the hot water outlet The pressure relief valve must conform to ANSI Z21 22 or CAN 1 4 4 and installation must follow local code The discharge capacity must be at least 140 000 BTU hr The discharge piping for the pressure relief valve must be directed so that the ho...

Page 13: ...ng only your hand to avoid any spark Never use tools If the knob will not turn by hand do not try to force it call a qualified service technician Force or attempted repair may result in a fire or explosion due to gas leaks Be sure to check next to the bottom of the unit because some gases are heavier than air and may settle towards the floor CAUTION IF YOU SMELL GAS 1 Do not try to start the water...

Page 14: ...testing water heater output the T KJR is rated for 179 gallons per hour GPH or 3 0 gallons per minute GPM when raising the water temperature by 77 F for example from 43 F to 120 F Refer to the following chart of typical household plumbing fixture flow rates to determine what the FLASH T KJR can do in a household application Lamp is lit Lamp is lit extinguished Household Flow Rates Appliance Use Fl...

Page 15: ...r Heater the output hot water temperature can be adjusted either manually from the main computer board s dipswitches or with the optional remote controller Part TK RE02 from 99 F to 167 F The dipswitches can set four hot water output temperatures 113 F 122 F 140 F and 182 F the factory set temperature is 122 F could damage the temperature controller and or the water heater which will void the warr...

Page 16: ...r operation after servicing The FLASH T KJR water heater requires an electrical power supply from 120 VAC 60 Hz circuit and be properly grounded A means for switching on off the 120 VAC power supply must be provided for service reasons Wire the heater exactly as shown in the wiring diagram A green screw is provided in the junction box for grounding connection MAINTENANCE AND SERVICE WARNING Turn o...

Page 17: ...Initiate First check the flow rate through the unit If the flow is less than 75 GPM the unit will not initiate Check the filter for any debris or damage If you have installed a combination system a T KJR doing both domestic hot water and space heating completely isolate the heating system temporarily to ensure flow is not backfeeding through your heating system to supply the domestic water by pass...

Page 18: ...pped with an ignition device that automatically lights the burner Do not try to light the burner by hand B BEFORE OPERATING smell all around the water heater area for evidence of leaking gas Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electric switch do not use an...

Page 19: ...e children or the infirm without supervised DANGER Hot Water Heater temperature over 125 F can cause severe burns instantly or death from scalding Children disabled and elderly are at the highest risk of being scalded Feel water temperature before bathing or showering Temperature limiting valves are available ask professional person DANGER Keep flammable products 1 Far away from heater 2 In approv...

Page 20: ...s water for space heating at temperatures higher than required for other uses a means such as a mixing valve shall be installed to temper the water for those other uses in order to reduce scald hazard potential Water temperature over 125 F can cause severe burns instantly or death from scalds Chemicals such as diluted Glycol can be used for radiant floor Hydro fan coil air or Baseboard heating onl...

Page 21: ...s follow the most recent edition of the National Standard Code ANSI Z21 10 3 Warning This illustration is a concept design only The reference to the 1 8th hole in check is only for the State of Massachusetts There are a wide variety of variations to the application of controls and equipment presented Designers must add all necessary safety and auxiliary equipment to conform to code requirements an...

Page 22: ...ure for longer periods of time then it can be installed in conjunction with a storage tank A pump will be necessary to keep the storage tank water hot We suggest a high head pump of 1 12 hp or greater depending on the system Recirculation This system will also need a high head pump of 1 12 hp or greater depending on the application situation ...

Page 23: ... as helping to prevent the unit from freezing in areas where cold air can be blown or drawn into the exhaust system Install this vent damper in accordance with Takagi s installation instructions and any applicable codes 4 TK TV04 Vent Cap The TK TV04 Vent Cap is for outdoor installation with the T KJr water heater The cap is installed on the top of the unit instead of connecting an exhaust vent pi...

Page 24: ...24 Component Diagram Case Heat Exchanger Computer ...

Page 25: ...25 Gas Manifold Water Way ...

Page 26: ...3 SCREW 124 FAN 125 PRESSURE SWITCH SENSING PLATE 126 SILICONE TUBE 127 EXHAUST PACKING 128 SCREW 129 OVERHEAT CUT OFF FUSE FIXING PLATE 130 OVERHEAT CUT OFF FUSE 131 OVERHEAT CUT OFF FUSE FIXING PLATE 132 HI LIMIT SWITCH 133 SCREW 134 SCREW 401 HEAT EXCHANGER ASSEMBLY 402 O RING 403 FREEZE PROTECTION HEATER 404 FREEZE PROTECTION HEATER PLATE 405 WATER INLET 406 INLET DRAIN PLUG 407 O RING 408 FIL...

Page 27: ... Output Hot Water GPM 40 F 50 F 60 F 70 F 40 F 4 6 4 2 3 8 3 5 3 3 3 1 2 9 2 7 2 6 2 4 2 3 2 1 1 9 1 8 1 8 1 7 1 6 50 F 5 7 5 1 4 6 4 2 3 8 3 5 3 3 3 1 2 9 2 7 2 6 2 3 2 1 2 0 1 9 1 8 1 8 60 F 5 7 5 1 4 6 4 2 3 8 3 5 3 3 3 1 2 9 2 6 2 3 2 2 2 1 2 0 1 9 70 F 5 7 5 1 4 6 4 2 3 8 3 5 3 3 2 9 2 6 2 4 2 3 2 2 2 1 90 95 100 105 110 115 120 125 130 135 140 150 160 165 170 175 180 ...

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