Instruction/ maintenance manual of the product BTN 120 THRU 400/A Series A.O. Smith
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1 MODELS BTN 120 THRU 400/A Series 108 COMMERCIAL GAS, GLASS-LINED, TANK-TYPE WATER HEATER • INSTALLATION • OPERATION • MAINTENANCE • LIMITED WARRANTY PLACE THESE INSTRUCTIONS ADJACENT TO HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE. Printed in U.
2 ROUGH-IN-DIMENSIONS FRONT VIEW TOP VIEW BACK VIEW TA N K APPROX U.S Gallons/Hr . and Litres/Hr at TEMPERA TU RE RISE INDICA TED CAP ACITY E F F . F ° 36F° 40F° 50F° 54F° 60F° 70F° 72F° 80F° 90F° 100F° 108F° 110F° 120F° 126F° 1 30 F° 140F° Model Btuh K W U.
3 T ABLE OF CONTENTS ROUGH-IN-DIMENSIONS -------------------------------- 2 FOREWORD ------------------------------------------------- 3 GENERAL SAFETY INFORMA TION -------------------- 4 Precautions .
4 GENERAL SAFETY INFORMA TION PRECAUTIONS DO NOT USE THIS APPLIANCE IF ANY P ART HAS BEEN UNDER W A TER. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water .
5 HIGH AL TITUDE INST ALLA TIONS WARNING INST ALLA TIONS ABOVE 2000 FEET (610 METERS) REQUIRE REPLACEMENT OF THE BURNER ORIFICE IN ACCORDANCE WITH SECTION 8.
6 The exhaust inducer is equipped with a gravity controlled damper to reduce the amount of heat loss through the flue, improving efficiency . EXHAUST INDUCER FIGURE 4 CIRCULA TING PUMP A circulating pump is used when a system requires a circulating loop or there is a storage tank used in conjunction with the heater .
7 length and width at least 2" greater than the diameter of the heater and must be piped to an adequate drain. The pan must not restrict combustion air flow . LEVELING If the unit is not level, insert the bolts which were used in crating into the legs to correct this condition.
8 BURNERS AND FLUE TUBES AND CREA TES A RISK OF ASPHYXIA TION. Where an exhaust fan is supplied in the same room with a heater , sufficient openings for air must be provided in the walls. UNDERSIZED OPENINGS WILL CAUSE AIR TO BE DRAWN INTO THE ROOM THROUGH THE CHIMNEY , CAUSING POOR COMBUSTION.
9 TYPE B GAS VENT Multiple Gas Fired T ank-T ype Heaters When venting multiple tank type heaters using T ype B vent pipe, follow the installation diagram (figure 4) and tables below which give sizing and data based upon NFP A 54/ANSI Z223. 1992. T ABLE 6.
10 MODEL BTN-250 Input: 250,000 Btu/hr T otal V ent Height (Feet) V ent Connector Size: 6 inches 6 8 10 15 20 30 50 1 00 Input Btuh/hr Rise V ent Connector Diameter (Inches) 250,000 1 Ft 8 8 7 7 7 6 6.
11 W A TER LINE CONNECTIONS This manual provides detailed installation diagrams (see pages 13-19 of this manual) for typical methods of application for the water heater(s). The water heater may be installed by itself, or with a separate storage tank, on both single and two-temperature systems.
12 INST ALLA TION DIAGRAMS-TOP INLET/OUTLET USAGE Use of the top inlet water connection requires installation of an inlet dip tube (refer to figure 8). The tube is supplied in the heater. Follow caution labels if applying heat to this fitting. Do not allow pipe dope to contact the plastic tube during installation.
13 VERTICAL ST ORAGE T ANK AND FORCED CIRCULA TION DANGER TEMPERA TURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERA TURE A T FIXTURES. SEE WA TER TEMPERA TURE CONTROL WARNING ON P AGE 25. IF HIGHER PREHEA T TEMPERA TURES ARE NECESSARY TO OBT AIN ADEQUA TE BOOSTER OUTPUT , ADD AN ANTI- SCALD V AL VE FOR HOT WA TER SUPPLIED T O FIXTURES.
14 DANGER TEMPERA TURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERA TURE A T FIXTURES. SEE WA TER TEMPERA TURE CONTROL WARNING ON P AGE 25. IF HIGHER PREHEA T TEMPERA TURES ARE NECESSARY TO OBT AIN ADEQUA TE BOOSTER OUTPUT , ADD AN ANTI- SCALD V AL VE FOR HOT WA TER SUPPLIED TO FIXTURES.
15 INST ALLA TION DIAGRAMS-SIDE INLET/OUTLET USAGE DANGER TEMPERA TURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERA TURE A T FIXTURES. SEE WA TER TEMPERA TURE CONTROL WARNING ON P AGE 25. IF HIGHER PREHEA T TEMPERA TURES ARE NECESSARY TO OBT AIN ADEQUA TE BOOSTER OUTPUT , ADD AN ANTI- SCALD V AL VE FOR HOT WA TER SUPPLIED T O FIXTURES.
16 ONE OR TWO TEMPERATURE - ONE HEATERS,HIGH TEMPERATURE STORAGE WITH OR WITHOUT RECIRCULATION HEATER WITH OR WITHOUT MIXING VALVE HEATER WITH MIXING VALVE AND RECIRCULATED SANITIZING LOOP NOTE 1: TOGGLE SWITCH CONTROLS 180°F (82°C) WA TER CIRCULATION.
17 TWO TEMPERATURE - TWO PRE-HEATERS WITH MIXING VALVE OR BOOSTER HEATER WITH OR WITHOUT BUILING RECIRCULATION TWO PRE-HEATERS WITH MIXING VALVE TWO PRE-HEATERS WITH BOOSTER HEATER DANGER TEMPERA TURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERA TURE A T FIXTURES.
18 MEDIUM TEMPERATURE - ONE HEATER WITH AUXILIARY STORAGE TANK FORCED CIRCULATION WITH OR WITHOUT BUILDING RECIRCULATION VERTICAL STORAGE TANK HORIZONTAL STORAGE TANK DANGER TEMPERA TURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERA TURE A T FIXTURES. SEE WA TER TEMPERA TURE CONTROL W ARNING ON P AGE 25.
19 MODEL DIMENSION “A” BTN-120 63” BTN-154 68” BTN-180 72” BTN-199 72” BTN-200/A 7 2” BTN-250/A 7 2” BTN-275/A 7 2” BTN-310/A 7 3” BTN-366/A 7 3” BTN-400/A 7 3” MANIFOLD KITS TWO UNIT MANIFOLD KIT (P ART NO. 78692) THREE UNIT MANIFOLD KIT (P ART NO.
20 HEA TER WIRING All electrical work must be installed in accordance with the latest version of the National Electrical Code ANSI/NFP A No. 70, must conform to all local code authority having jurisdiction. AN ELECTRICAL GROUND IS REQUIRED TO REDUCE RISK OF ELECTRICAL SHOCK OR POSSIBLE ELECTROCUTION.
21 GAS PIPING Contact your local gas service company to ensure that adequate gas service is available and to review applicable installation codes for your area. Size the main gas line in accordance with T able 3. The figures shown are for straight lengths of pipe at 0.
22 correct water column pressure allowing for a nominal pressure drop through the controls. The minimum gas supply pressure for input adjustment must not be less than 4.5" w .c. (1.12 kPa) for natural gas. Do not subject the combination gas valve to inlet gas pressures of more than 14.
23 SEQUENCE OF OPERA TION The following information will describe the Sequence of Operation for this appliance. 1. Switch power on to unit. 2. Thermostat calls for heat. 3. Ignition Control Board performs diagnostic check on system components. 4 . On completion of diagnostics check, the Ignition Control Board sends signal to Exhaust Inducer .
24 A. This appliance does not have a pilot. It is equipped with an ignition device which automatically lights the burner . Do not try to light the burner by hand. B . BEFORE OPERA TING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor .
25 W A TER TEMPERA TURE CONTROL DANGER THIS W A 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 UT OMA TIC DISHWASHER AND LAUNDRY USE CAN CAUSE SCALD BURNS RESUL TING IN SERIOUS PERSONAL INJURY AND/ OR DEA TH.
26 Servicing of the ignitor assembly includes keeping the ignitor free of lint, scale or any other foreign debris. FIGURE 1 1, IGNIT OR MAIN BURNER The main burner , fig.12, should display the following characteristics: • Cause rapid ignition and carry across entire burner .
27 When the heater is operating at full capacity , or full gas input, it should consume 1 cu. ft. of gas in time indicated on T able 9. VENTING SYSTEM Examine the venting system every six months for obstructions and/or deterioration of the vent piping.
28 Hydrochloric base acids are not recommended for use on glass lined tanks. CAUTION Observe handling instructions on label of product being used. T ANK CLEANOUT PROCEDURE The following practices will ensure longer life and enable the unit to operate at its designed efficiency: 1.
29 Note: If your container does not have the vent cap and vent boss, drill a 3/16" hole in the handle. When you have finished deliming you will be able to plug this drilled vent with the stainless steel screw that is supplied with the kit.
30 REPLACEMENT P ARTS, SERVICE HANDBOOKS AND TRAINING AIDS Replacement parts may be ordered through A.O. Smith dealers, authorized servicers or distributors. Refer to the Y ellow Pages f or where to call or contact the A.O. Smith Water Product s Company , Product Service Division, 5621 W est 1 15th Street, Alsip, IL 608 03, 1-800- 433-2545.
31 OPERA TIONAL CHECKLIST This checklist in conjunction with “TROUBLESHOOTING” and the “SEQUENCE OF OPERA TION” should be used as an on-the-job troubleshooting guide to identify the cause of incorrect system operation and suggest a remedy for its correction.
32 Model BTN Limited Warranty 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.
An important point after buying a device A.O. Smith BTN 120 THRU 400/A Series (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 BTN 120 THRU 400/A Series 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 BTN 120 THRU 400/A Series - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, A.O. Smith BTN 120 THRU 400/A Series 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 BTN 120 THRU 400/A Series will certainly help you make a decision on the purchase.
If you already are a holder of A.O. Smith BTN 120 THRU 400/A Series, 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 BTN 120 THRU 400/A Series.
However, one of the most important roles played by the user manual is to help in solving problems with A.O. Smith BTN 120 THRU 400/A Series. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device A.O. Smith BTN 120 THRU 400/A Series 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
