Warning 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. Warning operation...
- 2 - contents specification …………. 2 introduction …………..3 for your safety …………..3-4 installation …………. 5 • general …………. 5 • accessories …………. 5 • indoor installation …………. 6 • venting instructions …………..6 -8 • gas supply/gas pipe sizing………..9-10 • water connection …………. 10-11 • electrical connectio...
- 3 - introduction this manual provides information necessary for the installation, operation, and maintenance of the model t-kd20 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 ...
- 4 - 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. 6. Warning: do not disconnect the electrical supply if the ambient temperature will drop below freezing. The freeze prevention device only wo...
- 5 - installation 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 co...
- 6 - indoor installation when installed indoors, the t-kd20 water heater shall be located in an area to maintain the following minimum clearances around the unit: indoor installation service clearances left side of heater 6” front (maintenance space) 24” back of heater 1” right side of heater 2” to...
- 7 - combustion air and ventilation 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 propa...
- 8 - 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 resul...
- 8 - canada u.S.A direct vent and other than direct vent direct vent other than direct vent a clearance above grade, veranda, porch, deck, or balcony. 1 foot 1 foot 1 foot b clearance to window or door that may be opened. 3 feet 1 foot 4 feet from below or side opening. 1 foot from above opening. C...
- 9 - gas supply and gas pipe sizing check that the type of gas matches the rating plate located on the cover of your water heater. The minimum and maximum inlet gas pressures are: natural gas min. 5” wc - max. 10.5” wc propane gas min. 11” wc - max. 14” wc gas pressure below this specified range fo...
- 10 - natural gas supply piping maximum capacity of natural gas based on a 0.60 specific gravity at a 0.5” wc pressure drop pipe size kbtu of natural gas length 10’ 20’ 30’ 40’ 50’ 60’ 70’ 80’ 90’ 100’ 125’ 150’ 200’ ¾” 372 255 205 175 156 142 130 121 114 107 95 86 74 1” 702 482 387 331 293 266 245...
- 11 - to re-start your heater, follow these steps: 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 the manual water shut-off valve located on the water supply line. 4. Open all the hot water taps to verify water flows ...
- 12 - initial operation for your safety please read before operating the unit for the first time . Once you have properly installed the unit and before firing it for the first time, check the gas and water connections for leaks. Open the main gas supply valve to the unit using only your hand to avo...
- 13 - temperature settings there are 4 preset temperatures that you can select from by adjusting the dipswitch settings on the computer board. The temperature has been preset at the factory to122ºf (50ºc). The computer will electronically control this temperature. At a fixture, mix cold water with ...
- 14 - if you will not be using your heater for a long period of time or if the temperatures (including the wind chill) will drop below 5 ºf (-15 ºc), turn off your heater and drain the unit of water (see ‘unit draining & filter cleaning’ section above for draining instructions). This will keep your...
- 15 - common trouble shooting the t-kd20 can burn gas at a maximum input rate of 185,000 btuh. This puts a limit on the possible output temperature and flow capabilities. If the water doesn’t seem hot enough, compare the flow and temperature that is being attained to the t-kd20 flow vs. Temperature...
16 wiring diagram a wiring diagram is located on the inside front panel of the appliance. 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. Replacem...
17 operating instructions 1. Stop! Read the safety information above or in the owners manual. 2. Turn off all electric power to the water heater. 3. Do not attempt to light the burner by hand. 4. Turn the gas manual gas valve located on the outside of the unit clockwise ↻ to the off position. 5. Wai...
18 vapors from flammable liquids will explode and catch fire causing death or severe burns. Do not use or store flammable products such as gasoline, solvents or adhesives in the same room or area near the water heater. Warning: do not install water heater where flammable products will be stored. Rea...
19 applications space heating applications the t-kd20 can be used for potable hot water heating applications as well as space heating applications. Warning • toxic chemicals used in boiler treatments such as alcohol, glycerol and glycol group must not be introduced into the system when used for open...
20 dual-purpose hot water heating (domestic and space heating) priority control devices such as a flow switch, an aquastat or other electronic controller can be used to prioritize the domestic water system over the heating system. Warning: follow all local codes, or in the absence of local codes, fo...
21 t-kd20 with storage tank this illustration is a concept design only. The maximum flow rate through the t-kd20 is 6.9 gpm. If it is necessary to achieve higher flow rates with full pressure for longer periods of time, then it can be installed in conjunction with a storage tank. A pump will be nece...
22 optional items 1. Tk-re02 temperature remote controller the tk-re02 temperature remote controller has two functions. It allows the output temperature from the t-kd20 to be adjusted within the range of 99 °f to 176 °f, and it also works as a diagnostic tool that will give a concise error code when...
23 component diagram computer board case.
24 computer burner manifold.
25 water way heat exchanger.
26 t-kd20 parts list 1 case assembly 46 screw 2 back guard panel assembly 47 spark electrode holder 3 front cover 48 spark electrode 4 fixing plate 49 flame sensor 5 transformer 50 screw 6 junction box 51 damper 7 junction box cover 52 wire holder 8 screw 53 screw 9 screw (coated) 54 manifold 10 scr...
27 out put temperature vs. Gpm (max.6.9 gpm) with various ground water temperature correct gas pipe size can be expect this chart 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 out put hot water temperature out put hot wa te r gpm 40 f 50 f 60 f 70 f 40 f 6.1 5.5 5.1 4.7 4.3 4.0 3.8 3.6 3.4 3.2 3.0 2.8 2.5 2.4...
