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A.O. Smith SERIES 100 - page 1
1 A DIVISION OF A.O. SMITH CORPORA TION Mc BEE, SOUTH CAROLINA PLACE THESE INSTRUCTIONS ADJACENT TO HEA TER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE. PRINTED IN U.S.A. 0307 P ART NO. 197727-000 CYCLONE Xi Model BTH 120-250(A) SERIES 100 AND 101 COMMERCIAL GAS W A TER HEA TER GAS-FIRED POWER BURNER FOR DOMESTIC HOT W A TER Thank you for buying ...
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A.O. Smith SERIES 100 - page 2
2 These designs comply with the current edition of the American National S t andard for Gas W ater Heaters, V olume III, ANSI Z21.10.3 / CSA 4.3 as an automatic circulating tank water heater , and automatic storage water heaters. Detailed installation diagrams are found in this manual. These diagrams will serve to provide the installer with a refer ...
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A.O. Smith SERIES 100 - page 3
3 DANGER THIS W A TER HEA TER IS EQUIPPED WITH AN ADJUST ABLE THERMOST A T TO CONTROL WA TER TEMPERA TURE. HOT WA TER TEMPERATURES REQUIRED FOR AUTOMA TIC DISHW ASHER AND LAUNDRY USE CAN CAUSE SCALD BURNS RESUL TING IN SERIOUS PERSONAL INJURY AND/ OR DEA TH. THE TEMPERA TURE A T WHICH INJURY OCCURS V ARIES WITH THE PERSON’S AGE AND THE TIME OF TH ...
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A.O. Smith SERIES 100 - page 4
4 water temperature be set for the lowest temperature which satisfies your hot water needs. This will also provide the most energy efficient operation of the water heater and minimize scale formation. SETTING THE WA TER HEA TER TEMPERA TURE A T 120°F/49°C WILL REDUCE THE RISK OF SCALDS. Some states require settings at specific lower temperatures. ...
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A.O. Smith SERIES 100 - page 5
5 LOCA TING THE HEA TER W ARNING THERE IS A RISK IN USING FUEL BURNING APPLIANCES SUCH AS GAS W A TER HEA TERS IN ROOMS, GARAGES OR OTHER AREAS WHERE GASOLINE, OTHER FLAMMABLE LIQUIDS OR ENGINE DRIVEN EQUIPMENT OR VEHICLES ARE STORED, OPERA TED OR REP AIRED. FLAMMABLE V APORS ARE HEA VY AND TRA VEL ALONG THE FLOOR AND MA Y BE IGNITED BY THE HEA TER ...
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A.O. Smith SERIES 100 - page 6
6 If the confined space is within a building of tight construction, air for combustion and ventilation must be obtained from outdoors. When directly communicating with the outdoors through vertical ducts, two permanent openings, located in the above manner , shall be provided. Each opening shall have a free area of not less than one square inch (6. ...
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A.O. Smith SERIES 100 - page 7
7 For all side wall terminated, horizontally vented power vent, direct vent, and power direct vent gas fueled water heaters installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7 ...
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A.O. Smith SERIES 100 - page 8
8 FIGURE 5a. U.S. POWER VENT CANADIAN POWER VENT FIGURE 5b. CAUTION TO PREVENT EXHAUSTING PRODUCTS FROM CIRCULA TING TO THE AIR INT AKE IN WINDY/COLD AREAS, THE MAXIMUM PRACTICAL DIST ANCE BETWEEN THESE TWO TERMINALS IS RECOMMENDED. ...
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A.O. Smith SERIES 100 - page 9
9 FIGURE 6a. U.S. DIRECT VENT CANADIAN DIRECT VENT FIGURE 6b. CAUTION TO PREVENT EXHAUSTING PRODUCTS FROM CIRCULA TING TO THE AIR INT AKE IN WINDY/COLD AREAS, THE MAXIMUM PRACTICAL DIST ANCE BETWEEN THESE TWO TERMINALS IS RECOMMENDED. ...
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A.O. Smith SERIES 100 - page 10
10 IMPORT ANT The vent system must terminate so that proper clearances are maintained as cited in local codes or the current editions of the National Fuel Gas Code, ANSI Z223.1/NFP A 54 or the Natural Gas and Prop ane Installation Code, CAN/CSA-B149.1. Do not terminate the exhaust vent terminal over public area where condensate or vapor can cause n ...
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A.O. Smith SERIES 100 - page 11
11 5. Glue the intake vent terminal to the section of the pipe. 6. Slide the wall plate over the pipe to stop against intake vent terminal. 7. Place a bead of caulking (not supplied) around the gap between the pipe and the wall. Place some of the caulking on the back of the plate to hold it against the wall after installation. 8. If the vent pipe i ...
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A.O. Smith SERIES 100 - page 12
12 NOTE: for Water Heaters in locations with high ambient temperatures (above 100°F or 38°C) and/or insufficient dilution air , it is recommended that CPVC or ABS pipe and fittings ( MUST USE SUPPLIED VENT TERMINAL) be used. 4. It is important that condensate not be allowed to buildup in the exhaust vent pipe. T o prevent this from happening the ...
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A.O. Smith SERIES 100 - page 13
13 LOW GAS PRESSURE SWITCH (SEE FIGURE 12) The Low Gas Switch (LGS) is a single-pole, normally open pressure switch that will close its conta cts when a rising pressure of 5.0 in. (1.25Kpa) W .C. is encountered. The contacts will open when the pressure falls below the fixed set point of 4.8"WC (1.18Kpa) for natural gas models and 8.5"WC ( ...
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A.O. Smith SERIES 100 - page 14
14 W ARNING THE HEA TER IS NOT INTENDED FOR OPERA TION A T HIGHER THAN 10.5" (2.59 KPa) W A TER COLUMN SUPPL Y GAS PRESSURE. HIGHER GAS SUPPL Y PRESSURES REQUIRE SUPPLEMENT AL REDUCING SERVICE REGULA TION. EXPOSURE TO HIGHER GAS SUPPL Y PRESSURE MA Y CAUSE DAMAGE T O THE GAS CONTROLS WHICH COULD RESUL T IN FIRE OR EXPLOSION. IF OVERPRESSURE HA ...
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A.O. Smith SERIES 100 - page 15
15 DISCONNECT THE APPLIANCE AND ITS MANUAL GAS SHUTOFF V AL VE FROM THE GAS SUPPL Y PIPING SYSTEM DURING A NY SUPPL Y PRESSURE TESTING EXCEEDING 1/2 PSIG (3.45Kpa). GAS SUPPL Y LINE MUST BE CAPPED WHEN DISCONNECTED FROM THE HEA TER. FOR TEST PRESSURES OF 1/2 PSIG (3.45Kpa) OR LESS, THE APPLIANCE NEED NOT BE DISCONNECTED, BUT MUST BE ISOLA TED FROM ...
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A.O. Smith SERIES 100 - page 16
16 CONDITIONER MUST BE INST ALLED IF THE ABOVE CONDITIONS EXIST . MALFUNCTIONS CAUSED BY A POOR ELECTRICAL SUPPL Y ARE NOT COVERED UNDER YOUR W ARRANTY . The controller is wired to the heater as shown in Figure 15. The model and rating plate provides the electrical information needed to size the complete heater branch supply . All electrical work m ...
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A.O. Smith SERIES 100 - page 17
17 USING THE ELECTRONIC CONTROLLER 1 . Overview Interaction with the water heater controller is done through an up, a down, and three operation buttons. These buttons are illustrated to the right. Operation of the three lower buttons is defined immediately above them on the screen. The [UP] and [DN] buttons are used to navigate through the menus an ...
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A.O. Smith SERIES 100 - page 18
18 3. Adjusting the Operating Set Point The Operating Set Point of this water heater determines the regulated temperature for the water in the tank. This parameter is adjusted in the T emperature menu. Items in this menu allow you to monitor different temperature readings in the tank along with adjusting the Operating Set Point and Differential . A ...
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A.O. Smith SERIES 100 - page 19
19 4. Changing the Display Units The display interface to the heater has the option of selecting between degrees Fahrenheit and degrees Celsius for temperature displays. This can be found in the “Display Settings” menu. Also in this menu, you may adjust how the backlight operates and the contrast of the LCD screen. ACTION: From the Main Menu, p ...
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A.O. Smith SERIES 100 - page 20
20 ACTION: T o get to the current fault information screen, press Menu. DISPLA Y : ACTION: Press the DOWN button to highlight "current Fault" and press Select. DISPLA Y : ACTION: Press the DOWN button for more information. DISPLA Y : 7. Viewing the Fault History The controller for this water heater will store a history of ten of the last ...
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A.O. Smith SERIES 100 - page 21
21 5. Check the vent system seams and joints and ensure that there is no discharge of flue products into the room. 6. Check the input rate. For appliance installation locations with elevations above 6500 feet (1982 meters) refer to HIGH AL TITUDE INST ALLA TIONS section of this manual. a. Attach a pressure gauge (manometer) to the manifold pressure ...
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A.O. Smith SERIES 100 - page 22
22 W ARNING UNDER NO CIRCUMST ANCES SHOULD THE INPUT EXCEED THE RA TE SHOWN ON THE HEA TER RA TING PLA TE. OVER FIRING COULD RESUL T IN DAMAGE OR SOOTING OF THE HEA TER. CA THODIC PROTECTION CAUTION HYDROGEN GAS CAN BE PRODUCED IN A HOT W A TER SYSTEM SERVED BY THIS HEA TER THA T HAS NOT BEEN USED FOR A LONG PERIOD OF TIME (GENERALL Y TWO WEEKS OR ...
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A.O. Smith SERIES 100 - page 23
23 FOR YOUR SAFETY READ BEFORE OPERA TING W ARNING: If you do not follow these instructions exactly , a fire or explosion may result causing property damage, personal injury or loss of life. BTH 120 MODELS ONL Y . ...
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A.O. Smith SERIES 100 - page 24
24 FOR YOUR SAFETY READ BEFORE OPERA TING W ARNING: If you do not follow these instructions exactly , a fire or explosion may result causing property damage, personal injury or loss of life. BTH 150 MODELS ONL Y . OPERA TING INSTRUCTIONS TURN OFF GAS T O APPLIANCE ...
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A.O. Smith SERIES 100 - page 25
25 OPERA TING INSTRUCTIONS TURN OFF GAS T O APPLIANCE FOR YOUR SAFETY READ BEFORE OPERA TING W ARNING: If you do not follow these instructions exactly , a fire or explosion may result causing property damage, personal injury or loss of life. BTH 199/250 MODELS ONL Y . OPERA TING INSTRUCTIONS TURN OFF GAS TO APPLIANCE ...
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A.O. Smith SERIES 100 - page 26
26 FIGURE 16. T o dissolve and remove the more stubborn mineral deposits, A.O. Smith UN•LIME® Professional Delimer should be used. A.O. Smith UN•LIME® Professional Delimer is an easy to handle patented food grade acid formulated specifically for lime scale removal from all types of water using equipment. Available in 1 gallon (3.8L) (part no. ...
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A.O. Smith SERIES 100 - page 27
27 DRAIN V AL VE AND ACCESS P ANELS The heaters are equipped with a 3/4" drain valve. An access panel covers the cleanout opening in the tank which is sealed by a gasket and cover , figure 25. RELIEF V AL VE At least twice a year , the temperature and pressure relief valve should be checked to ensure that it is in operating condition. T o chec ...
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A.O. Smith SERIES 100 - page 28
28 ONE TEMPERA TURE - ONE HEA TER HORIZONT AL ST ORAGE T ANK FORCED CIRCULA TION WITH OR WITHOUT BUILDING RECIRCULA TION DANGER TEMPERA TURE SETTING SHOULD NOT EXCEED SAFE TEMPERA TURE A T FIXTURES. SEE WA TER TEMPERA TURE CONTROL W ARNING ON P AGE 4. IF HIGHER PREHEA T TEMPERA TURES ARE NECESSARY TO OBT AIN ADEQUA TE BOOSTER OUTPUT , ADD AN ANTI-S ...
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A.O. Smith SERIES 100 - page 29
29 * PIPE RELIEF V A L VE TO OPEN DRAIN. NOTE: IF TEMPERED WA TER IS RECIRCULA TED, RETURN LINE SHOULD BE CONNECTED A T POINT “A”. INST ALL IN ACCORDANCE WITH LOCAL CODES. TWO TEMPERA TURE - ONE HEA TER HIGH TEMPERA TURE WITH OR WITHOUT BUILDING RECIRCULA TION DANGER TEMPERA TURE SETTING SHOULD NOT EXCEED SAFE TEMPERA TURE A T FIXTURES. SEE W A ...
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A.O. Smith SERIES 100 - page 30
30 TWO TEMPERA TURE - TWO HEA TERS HIGH TEMPERA TURE WITH OR WITHOUT BUILDING RECIRCULA TION TWO TEMPERA TURE - THREE HEA TERS (TWO PRE-HEA TERS/ONE BOOSTER HEA TER) WITH OR WITHOUT BUILDING RECIRCULA TION MUST BE IDENTICAL HEA TERS FOR MUL TIPLE HEA TER INST ALLA TION SEE MANIFOLD KIT SPECIFICA TIONS, P AGE 33. CAUTION: IF BUILDING COLD W A TER SU ...
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A.O. Smith SERIES 100 - page 31
31 * PIPE RELIEF V AL VE T O OPEN DRAIN * * 140°F (60°C) TO 150°F (66°C) SHOULD BE MAXIMUM W A TER TEMPERA TURE MAINT AINED IN THE PRE-HEA TERS. 120°F (49°C) SHOULD BE THE MINIMUM TEMPERA TURE OF W A TER IN THE PRE- HEA TERS. CONNECT CIRCULA TING LINE FROM FIXTURES, IF USED, T O COLD W A TER SUPPL Y LINE OF PRE-HEA TER. CONNECT CIRCULA TING L ...
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A.O. Smith SERIES 100 - page 32
32 NOTE 1: TOGGLE SWITCH CONTROLS 180°F (82°C) WA TER CIRCULA TION. INST ALL ON OR CLOSE TO DISHW ASHER. TOGGLE SWITCH MUST BE CLOSED (ON) DURING THE RINSE OPERA TION AND OPEN (OFF) WHEN DISHW ASHER IS NOT OPERA TING OR WHEN ON LONG ST ANDBY . NOTE 2: INST ALL LINE TEMPERA TURE CONTROL IN AN UNINSULATED TEE BEYOND THE DISHWASHER T AKEOFF IN THE S ...
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A.O. Smith SERIES 100 - page 33
33 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. Dimensions shown are for minimum space occupied by the wate ...
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A.O. Smith SERIES 100 - page 34
34 CHECKLIST AND SERVICE INFORMA TION IMPORT ANT 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 equipment, be allowed to service the heater . BE ...
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A.O. Smith SERIES 100 - page 35
35 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 volt s to the controller, check for loose connections or a locked rotor . If the rotor cannot ...
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A.O. Smith SERIES 100 - page 36
36 Model BTH Limited W arranty A. O. Smith Corporation, the warrantor, extends the following LIMITED W ARRANTY to the owner of this water heater . 1. THE T ANK 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 water therein, during the first THREE years af ...
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A.O. Smith SERIES 100 - page 37
37 NOTES: ...
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A.O. Smith SERIES 100 - page 38
38 NOTES: ...
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A.O. Smith SERIES 100 - page 39
39 NOTES: ...
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A.O. Smith SERIES 100 - page 40
40 A.O. SMITH WATER PRODUCTS COMPANY 500 TENNESSEE WAL TZ P ARKWA Y ASHLAND CITY , TN 37015 PHONE: 1-800-433-2545 F AX: 1-800-433-2515 w w w .aosmithwaterheaters.com / email: part s@hotwater .com ...
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