A.O. Smith 120 trough 500 Manuel d'installation Page 1

1MODELS BTR(C)120 THRU 500ACOMMERCIAL GAS, GLASS-LINED, TANK-TYPE WATER HEATER• INSTALLATION • OPERATION • MAINTENANCE • LIMITED WARRANTYPLACE THESE I

10CONFINED SPACEWhen drawing combustion and dilution air from inside aconventionally constructed building to a confined space, such aspace shall be pr

11MODEL BTR(C)-120Input: 120,00Btuh Total Vent Height (Feet)Draft Hood: 5” 6 8 10 15 20 30 50 100Input Btuh Rise Vent Connector Diameter (inches)120,

12MODEL BTR(C)-250, 251Input: 250,000, 251,000 Total Vent Height (Feet)Draft Hood: 6” 6 8 10 15 20 30 50 100Input Btuh Rise Vent Connector Diameter (

13If a water heater is installed in a closed water system, contactthe water supplier or local plumbing inspector on how to controlthis situation.WATER

14GAGE- 3.5 kPa) SUPPLY GAS PRESSURE. EXPOSURE TOHIGHER SUPPLY PRESSURE MAY CAUSE DAMAGE TO THEGAS VALVE WHICH COULD RESULT IN FIRE OR EXPLOSION.IF O

15INSTALLATION DIAGRAMS-TOP INLET/OUTLET USAGEGENERALThe type, size and location of the relief valves must be inaccordance with local codes. The loca

16VERTICAL STORAGE TANK AND FORCED CIRCULATION DANGERTEMPERATURE SETTING SHOULD NOT EXCEED SAFE USETEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CON

17 DANGERTEMPERATURE SETTING SHOULD NOT EXCEED SAFE USETEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROLWARNING ON PAGE 27. IF HIGHER PREHEAT T

18INSTALLATION DIAGRAMS-SIDE INLET/OUTLET USAGE DANGERTEMPERATURE SETTING SHOULD NOT EXCEED SAFE USETEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CO

19ONE OR TWO TEMPERATURE - ONE HEATERS,HIGH TEMPERATURESTORAGE WITH OR WITHOUT RECIRCULATIONHEATER WITH OR WITHOUT MIXING VALVEHEATER WITH MIXING VALV

2ROUGH-IN-DIMENSIONSSee Models BelowFIGURE 1MODELS BTR(C) 120 THROUGH 500BTR MODELS 120 THROUGH 500A - TABLE 1A MODEL INPUT APPROX. GAS H VENT

20TWO TEMPERATURE - TWO PRE-HEATERS WITH MIXING VALVE ORBOOSTER HEATER WITH OR WITHOUT BUILING RECIRCULATIONTWO PRE-HEATERS WITH MIXING VALVETWO PRE-H

21MEDIUM TEMPERATURE - ONE HEATER WITH AUXILIARY STORAGE TANKFORCED CIRCULATION WITH OR WITHOUT BUILDING RECIRCULATIONVERTICAL STORAGE TANKHORIZONTAL

22MANIFOLD KITSTWO UNIT MANIFOLD KIT(PART NO. 195686)THREE UNIT MANIFOLD KIT(PART NO. 195687)FOUR UNIT MANIFOLD KIT(PART NO. 195688) DIM

23MECHANICAL VENTINGSINGLE UNIT INSTALLATIONWhen mechanical venting of these heaters is desired, thefollowing kits are available.BTR(C) 120 through th

24OPERATIONIMPORTANTA qualified person must perform the initial firing of the heater. Atthis time the user should not hesitate to ask the individual

251. ROTATE THERMOSTAT DIAL -BY HAND- COUNTERCLOCKWISE TO LOWEST SETTING. SEE STEP 5 ABOVE.2. TURN OFF ALL ELECTRICAL POWER TO THE APPLIANCE IF SE

261. ROTATE THERMOSTAT DIAL -BY HAND- COUNTERCLOCKWISE TO LOWEST SETTING. SEE STEP 5 ABOVE.2. TURN OFF ALL ELECTRICAL POWER TO THE APPLIANCE IF SER

27ADJUSTMENTSON INITIAL STARTUP SOME ADJUSTMENTS ARE NECESSARY.1. CHECK MANIFOLD AND INLET GAS PRESSURES.2.TO ADJUST PILOT FLAME - FOLLOW “PILOT BURNE

282. Inspect the venting system for proper size and horizontalpitch, as required in the National Fuel Gas Code, ANSI Z223.1or the CAN/CGA B149 Instal

29TYPICAL PILOT AND MAIN BURNER FLAMESFIGURE 17If the preceding burner characteristics are not evident, check foraccumulation of lint or other foreign

3TABLE 1C - HEATER PERFORMANCE DATA BTR MODELSINPUT APPROX. RECOVERY RATING CAPACITIES (GPH AND LPH)RATE GAL EFF. 30° F 40° F 50° F 60° F 70° F 80° F

30VENTING SYSTEMExamine the venting system every six months for obstructionsand/or deterioration of the vent piping.Remove all soot or other obstructi

31cleanout. UN•LIME® and the booklet may be obtained throughyour A. O. Smith dealer or distributor.FIGURE 19DELIMING SOLVENTSA. O. Smith recommends th

321. With the 5 gallon Up-N-Down container in the vertical position,unscrew the plastic vent cap in the handle and pierce theplastic membrane over the

33PIN END VIEW24 V.A.C. NORMAL SEQUENCE OF OPERATIONB. DAMPER HAS OPENED,NO COMBUSTIONVOLTAGE ACROSS:4 & 1; 4 & 2; 4 & 3: 1. Check for pow

34OPERATIONAL CHECKLISTThis checklist in conjunction with “TROUBLESHOOTING” and the “SEQUENCE OF OPERATION” should be used as an on-the-jobtroubleshoo

35Model BTR(C) Limited WarrantyA. O. Smith Corporation, the warrantor, extends the following LIMITED WARRANTY to the owner of this water heater.1. TH

365621 W. 115TH STREET, ALSIP, IL 60803Phone: 800-433-2545 Fax: 800-433-2515www.aosmithwaterheaters.comREPLACEMENT PARTS

4TABLE OF CONTENTSROUGH-IN-DIMENSIONS ---------------------------------------- 2-3TABLE OF CONTENTS ---------------------------------------------- 4FO

5GENERAL SAFETYINFORMATIONPRECAUTIONSDO NOT USE THIS APPLIANCE IF ANY PART HAS BEEN UNDERWATER. Immediately call a qualified service technician to in

6• Do not cover the instruction manual. Keep it on the side of thewater heater or nearby for future reference.•Do not allow insulation to come within

7Continued manual resetting of high limit control, preceded byhigher than usual water temperature is evidence of high limitswitch operation. The foll

8The National Sanitation Foundation also recommendscirculation of 1800F (82°C) water. Where this is done, thecirculation should be very gentle so tha

9A service clearance of 24" (61cm) should be maintained fromserviceable parts, such as relief valves, flue baffles, flue damperdevices, thermosta