1 a division of a.O. Smith corporation mc bee, south carolina place these instructions adjacent to heater and notify owner to keep for future reference. Printed in u.S.A. 2570 1199 part no. 194119-000 supersedes p/ns. 192968-000/193329-000/193311-000 warning: if the information in these instructions...
2 table 1. Recovery capacities - natural gas / l.P. Rough-in -dimensions cyclone xhe bth 120 - 250 recovery capacities are based on heater performance at 94% thermal efficiency. Temperature rise - degrees °f - gallons per hour model btu approx. Input gallon capacity 30 40 50 60 70 80 90 100 110 120 ...
3 water line connections .................................................................. 14 heater wiring .................................................................................. 14 operation ......................................................................................... 15 se...
4 temperature time to produce 2nd & 3rd setting degree burns on adult skin 180°f nearly instantaneous 170°f nearly instantaneous 160°f about 1/2 second 150°f about 1-1/2 seconds 140°f less than 5 seconds 130°f about 30 seconds 120°f more than 5 minutes figure 1 valves for reducing point-of-use tempe...
5 dishwashing machine requirement all dishwashing machines meeting the national sanitation foundation requirements are designed to operate with water flow pressures between 15 and 25 pounds per square inch. Flow pressures above 25 pounds per square inch, or below 15 pounds per square inch, will resu...
6 unconfined space in buildings of conventional frame, brick or stone construction, unconfined spaces may provide adequate air for combustion and ventilation. If the unconfined space is within a building of tight construction (buildings using the following construction: weather stripping, heavy insu...
7 figure 5 *note: bth 250 uses tee on air intake terminal direct vent horizontal vent figure 6 do not terminate exhaust over public area where condensate or vapor can cause nuisance or hazard. Exhaust vent hood must be located 1' minimum from any opening in building..
8 important the vent system must terminate so that proper clearances are maintained as cited in local codes or the latest edition of the national fuel gas code, ansi z223.1,7.3.4e and 7.8a,b, as follows: 1. Do not terminate the exhaust vent terminal over public area where condensate or vapor can cau...
9 important when locating the terminals on a sidewall, the following specifications pertaining to terminal location must be followed. 1. The intake vent terminal and the exhaust vent terminal must terminate on the same exterior wall and must be located at a minimum of 24" (inches) from the vertical ...
10 figure 12 installation of vent system warning the optional intake venting arrangement and the exhaust venting arrangement must be installed to run directly to the outdoors and not in any way be connected to another venting system (i.E. Furnace, dryers or space heaters). It is crucial that the ven...
11 d. Know your own qualifications or those of your contractor. The solvent welding technique of joining pvc, pvc cellular core, abs or cpvc pipe is a specialized skill just as any other pipe fitting technique. E. Closely supervise the installation and inspect the finished job before start-up. F. Co...
12 tubing must be connected in order for the switch to change the electrical contacts. The controller requires that the electrical contacts on this air flow switch be open before it will allow the blower to come on. Blocked outlet prover switch (see figure 13) the blocked outlet prover switch is set...
13 connection of gas pipe 1. When connecting gas pipe to unit, apply wrench to flange only. Note: do not use wrench on gas valve or gas bracket. See figure 15. 2. Perform the gas leak test any time work is done on a gas system to avoid the possibility of fire or explosion with property damage, perso...
14 heater wiring if any of the original wire as supplied with the appliance must be replaced, it must be replaced with 105°c wire or its equivalent, except in the burner housing. In this case use 200°c wire. The computer control requires a source of stable clean electricity for proper operation. Ins...
15 operation sequence of operation typical control/appliance operating sequence 1. When the control is powered, it should first display 0, then the input line voltage (120), the calibration setting (12), then the actual water temperature in the tank. 2. If the control determines that the actual ...
16 error codes the following error codes are external to the controller. 01 pressure switch fail on, should be off 11 pressure switch fail off, should be on 02 ignition fail after 3 attempts 04 eco open 05 temperature probe open 15 temperature out of bounds 25 temperature out of bounds > 220 degrees...
17 display flashes 05 when button is pressed: display flashes 15 when button is pressed: display flashes 25 when button is pressed: eco switch open (figure 22) eco led flashing: eco switch open, eco led flashing figure 22 control bad (figure 23) all leds flashing: possible cause remedy 1. This...
18 adjustment procedure initial start-up a minimum gas supply pressure of 5.0" w.C. (4.5" on bth 150 and 199) for natural gas (11.0" w.C. For l.P. Gas) is required before making any adjustment to the gas control pressure regulator attempts to adjust the regulator during periods of low gas supply pre...
19 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..
20 warning under no circumstances should the input exceed the rate shown on the heater rating plate. Overfiring could result in damage or sooting of the heater. Cathodic protection caution hydrogen gas can be produced in a hot water system served by this heater that has not been used for a long peri...
21 figure 25 to dissolve and remove the more stubborn mineral deposits, a.O. Smith unlime® professional delimer should be used. A.O. Smith unlime® professional delimer is an easy to handle patented food grade acid formulated specifically for lime scale removal from all types of water using equipme...
22 to inspect or replace an anode: the anodes on this heater are easily accessible from the top of the heater making replacement simple and quick. 1. Turn the heater off per the lighting instructions. Connect a hose to the drain valve . Locate the hose's discharge in an area where hot water will not...
23 one temperature - one heater horizontal storage tank forced circulation with or without building recirculation danger temperature setting should not exceed safe temperature at fixtures. See water temperature control warning on page 4. If higher preheat temperatures are necessary to obtain adequat...
24 * pipe relief valve to open drain. Note: if tempered water is recirculated, return line should be connected at point a. Install in accordance with local codes. Two temperature - one heater high temperature with or without building recirculation danger temperature setting should not exceed safe ...
25 two temperature - two heaters high temperature with or without building recirculation two temperature - three heaters (two pre-heaters/one booster heater) with or without building recirculation must be identical heaters for multiple heater installation see manifold kit specifications, page 28. Ca...
26 * pipe relief valve to open drain ** 140°f to 150°f should be maximum water temperature maintained in the pre-heaters. 120°f should be the minimum temperature of water in the pre-heaters. Connect circulating line from fixtures, if used, to cold water supply line of pre-heater. Connect circulating...
27 note 1: toggle switch controls 180°f water circulation. Install on or close to dishwasher. Toggle switch must be closed (on) during the rinse operation and open (off) when dishwasher is not operating or when on long standby. Note 2: install line temperature control in an uninsulated tee beyond th...
28 manifold kits precision cut type l all copper a.O. Smith manifold kits assure water flow balance of all units. Without this balance, the full water heating and storage potential of the system cannot be achieved. Plus, the units with the higher water flow may have a shortened life. Unions shown ...
29 checklist and service information important the installer may be able to observe and correct certain problems which might arise when the unit is put into operation or when it is re-fired after a prolonged shutdown. However, it is recommended that only qualified servicemen, using appropriate test ...
30 motor will not run 1. Confirm 120v ac to the controller. Also, to verify correct polarity, check for 120 v ac between hot supply and ground. If there is no voltage, check for a loose connection where it connects to the controller. 2. If there is 120 volts to the controller, check for loose connec...
31 model bth limited warranty a. O. Smith corporation, the warrantor, extends the following limited warranty to the owner of this water heater. 1. The tank if the glass-lined tank in this water heater shall prove upon examination by the warrantor to have leaked due to natural corrosion from potable ...
32 a.O. Smith water products co., inc. 5621 w. 115th street alsip, illinois 60803 phone: 1-800-433-2545 fax: 1-800-433-2515 www.Hotwater.Com e-mail: parts@hotwater.Com.
