Instruction/ maintenance manual of the product BTH 300A, BTH 400A A.O. Smith
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1 PLACE THESE INSTRUCTIONS ADJACENT T O HEA TER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE. PRINTED IN U.S.A. 0706 P ART NO. 197373-001 CYCLONE XHE ® Model BTH 300A AND 400A COMME R CIAL GAS W A TER HEA TER GAS-FIRED POWER BURNER FOR DOMESTIC HOT W A TER Thank you for buying this energy efficient water heater from A.
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. Det ailed installation diagrams are found in this manual.
3 DANGER THIS WA TER HEA TER IS EQUIPPED WITH AN ADJUST ABLE THERMOST A T TO CONTROL W A TER TEMPERA TURE. HOT W A TER TEMPERA TURES REQUIRED FOR A UTOMA TIC DISHW ASHER AND LAUNDR Y USE CAN CAUSE SCALD BURNS RESUL TING IN SERIOUS PERSONAL INJURY AND/OR DEA TH.
4 “A T A GLANCE ” BTH 300/400 QUICK INST ALLA TION TIPS Horizontal Sidewall V enting V ertical Roo f top Venting.
5 The temperature may be adjusted from 80°F/27°C to 180°F/82°C. The thermostat was adjusted to 120°F/49°C before the heater was shipped from the factory .
6 THE HEA TER SHALL BE LOCA TED OR PROTECTED SO IT IS NOT SUBJECT T O PHYSICAL DAMAGE BY A MOVING VEHICLE. DO NOT LOCA TE THE HEA TER WHERE NOISE FROM THE EXHAUST OR INT AKE WILL BE OBJECTIONABLE. THIS INCLUDES LOCA TIONS CLOSE T O OR ACROSS FROM WINDOWS AND DOORS.
7 CLEARANCES These heaters are approved for installation on combustible flooring in an alcove when the minimum clearances from any combustion construction are followed as indicated in Figure 4. In all installations the minimum combustible clearances from any vent piping shall be 0".
8 US DIRECT VENT CANADIAN DIREC T VENT FIGURE 5. CAUTION TO PREVENT EXHAUSTING PRODUCTS FROM CIRCULA TING T O THE AIR INT AKE IN WINDY/COLD AREAS, THE MAXIMUM PRACTICAL DIST ANCE BETWEEN THESE TWO TERMINALS IS RECOMMENDED.
9 US HORIZONT A L VENT CANADIAN HORIZONT AL VENT FIGURE 6. CAUTION TO PREVENT EXHAUSTING PRODUCTS FROM CIRCULA TING T O THE AIR INT AKE IN WINDY/COLD AREAS, THE MAXIMUM PRACTICAL DIST ANCE BETWEEN THESE TWO TERMINALS IS RECOMMENDED.
10 Heater must be protected from freezing downdraft s during shutdown periods. W ARNING NEVER OPERA TE THE HEA TER UNLESS IT IS VENTED TO THE OUTDOORS AND HAS ADEQUA TE AIR SUPPL Y TO A VOID RISKS OF IMPROPER OPERA TION, FIRE, EXPLOSION OR ASPHYXIA TION.
11 2. The horizont al centerline of the intake vent terminal may not be located lower than the horizontal centerline of the exhaust vent terminal (see Figure 9).
12 2. Drill a pilot hole approximately 1/4" (6 mm) outside of the marked circle. This pilot hole is used as a starting point for a saws-all or sabre saw blade. Cut around the marked circle staying approximately one quarter inch outside the line. (This will allow the vent pipe to easily slide through the opening).
13 VENT PIPE PREP ARA TION 1. INITIAL PREP ARA TION A. Make sure the solvent cement you are planning to use is designed for the specific application you are attempting. B . Know the physical and chemical characteristics and limitations of the PVC, PVC cellular core, ABS or CPVC piping materials that you are about to use.
14 HOT SURF ACE IGNITER The Hot Surface Igniter is a device that ignites the main burner by high temperature (>1800°F or >982°C). When 120V AC is applied to the igniter , sufficient heat is generated to ignite the main burner .
15 LESS, THE APPLIANCE NEED NOT BE DISCONNECTED, BUT MUST BE ISOLA TED FROM THE SUPPL Y PRESSURE TEST BY CLOSING THE MANUAL GAS SHUTOFF V AL VE. BEFORE PLACING THE HEA TER IN OPERA TION, CHECK FOR GAS LEAKAGE. USE SOAP AND W A TER SOLUTION OR OTHER MA TERIAL ACCEPT ABLE FOR THE PURPOSE OF LOCA TING GAS LEAKS.
16 4 . When the system requires water for space heating at temperatures higher than required for domestic water purposes, a tempering valve must be installed. Please refer to inst allation diagrams on p ages 23 through 28 in back of manual for suggested piping arrangements.
17 FIGURE 16..
18 SELF DIAGNOSTIC CONTROLLER This controller is designed for ignition lockout after three consecutive failed attempts to light. If lockout occurs, the display lights will match Figure 17. Along with this, a numeric message will appear in the display .
19 ERROR CODES The following Error Codes are external to the controller. 01 Pressure Switch Fail On, should be Off 1 1 Pressure Switch Fail Off, should be On 02 Ignition Fail after 3 attempts 04 ECO O.
20 Display Flashes “05” when button is pressed: Display Flashes “15” when button is pressed: Display Flashes “25” when button is pressed: ECO SWITCH OPEN. See Figure 21. ECO LED Flashing: ECO SWITCH OPEN, ECO LED Flashing FIGURE 21. CONTROL BAD.
21 DO NOT USE THIS HEA TER IF ANY P ART HAS BEEN UNDER WA TER. IMMEDIA TEL Y CALL A QUALIFIED SERVICE TECHNICIAN TO INSPECT THE HEA TER AND TO REPLACE ANY P ART OF THE CONTROL SYSTEM AND ANY GAS CONTROL WHICH HAS BEEN UNDER WA TER. LIGHT THE UNIT IN ACCORDANCE WITH THE OPERA TING INSTRUCTIONS LABEL A TT ACHED TO THE HEA TER.
22 LIGHTING AND OPERA TION INSTRUCTIONS c. Remove the pressure regulator cover screw (Figure 16) and adjust the pressure by turning the adjusting screw with a small screwdriver . In this example, with heater running on natural gas, do not exceed 4.0" (0.
23 W ARNING UNDER NO CIRCUMST ANCES SHOULD THE INPUT EXCEED THE RA TE SHOWN ON THE HEA TER RA TING PLA TE. OVERFIRING COULD RESUL T IN DAMAGE OR SOOTING OF THE HEA TER.
24 MAINTENANCE SCHEDULE Following are the instructions for performing some of the recommended maintenance. Unit inspection and adjustment should be performed by a competent technician. NOTE: UN•LIME is not available in Canada. Please call Customer Service at 1-800-265-8520 for approved alternatives.
25 2. Remove outer cover plate from lower side of heater jacket. 3. Remove cover from cleanout opening. 4. Remove lime, scale or sediment using care not to damage the glass-lining. 5. Inspect cleanout plate gasket: If new gasket is required, replace with A.
26 ONE TEMPERA TURE - ONE HEA TER HORIZONT AL STORAGE T ANK FORCED CIRCULA TION WITH OR WITHOUT BUILDING RECIRCULA TION DANGER TEMPERA TURE SETTING SHOULD NOT EXCEED SAFE TEMPERA TURE A T FIXTURES.
27 * PIPE RELIEF V AL VE T O OPEN DRAIN. NOTE: I F 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.
28 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 30.
29 * PIPE RELIEF V AL VE T O OPEN DRAIN ** 140°F (60°C)TO 150°F (66°C) SHOULD BE MAXIMUM WA 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, TO COLD W A TER SUPPL Y LINE OF PRE-HEA TER.
30 NOTE 1: T OGGLE 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 DISHWASHER IS NOT OPERA TING OR WHEN ON LONG ST ANDBY.
31 MANIFOLD KITS Precision cut type “L” all copper A.O. Smith manifold kit s assure water flow balance of all units. Without this balance, the fu ll water heating and storage potential of the system cannot be achieved. Plus, the units with the higher water flow may have a shortened life.
32 CHECKLIST AND SERVICE INFORMA TION IMPORT ANT The installer may be able to observe and correct cert ain 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 .
33 Checking these four (4) items first will often result in a timely solution to the service call. W ARNING JUMPING OUT COMPONENTS AND/OR CIRCUITS DURING TROUBLESHOOTING CAN CAUSE SERIOUS PROBLEMS WITH THE UNIT’S OPERA TING SEQUENCE AND IGNITION SAFETY .
34 NOTE: Always turn off and disconnect main supply wiring before servicing the unit. 4. Check connecting wire to the flame sensor . V erify that the flame sensor has not been damaged in any way . 5. V erify that the air supply is adequate. The air inlet screen or blower wheel may be restricted.
35 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 he.
36 ww w .hotwater .com.
An important point after buying a device A.O. Smith BTH 300A, BTH 400A (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought A.O. Smith BTH 300A, BTH 400A yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data A.O. Smith BTH 300A, BTH 400A - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, A.O. Smith BTH 300A, BTH 400A you will learn all the available features of the product, as well as information on its operation. The information that you get A.O. Smith BTH 300A, BTH 400A will certainly help you make a decision on the purchase.
If you already are a holder of A.O. Smith BTH 300A, BTH 400A, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime A.O. Smith BTH 300A, BTH 400A.
However, one of the most important roles played by the user manual is to help in solving problems with A.O. Smith BTH 300A, BTH 400A. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device A.O. Smith BTH 300A, BTH 400A along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
