A.O. Smith BTI 120 Page 1 Installation & Operation Manual Download

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MODELS BTI 120 THRU 400/A

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.

PART NO. 195809-000

Printed in U.S.A. 0803

SUPERSEDES PART NO.194780-000

A DIVISION OF A. O. SMITH CORPORATION

McBEE, SOUTH CAROLINA, USA

www.hotwater.com

CAUTION

TEXT PRINTED OR OUTLINED IN RED CONTAINS
INFORMATION RELATIVE TO YOUR SAFETY. PLEASE READ
THOROUGHLY BEFORE INSTALLING AND USING THIS
APPLIANCE.

Thank you for buying this energy efficient water heater from
A.O. Smith Water Products Company. We appreciate your
confidence in our products.

Summary of Contents for BTI 120

Page 1: ...000 Printed in U S A 0803 SUPERSEDESPARTNO 194780 000 ADIVISION OFA O SMITH CORPORATION McBEE SOUTH CAROLINA USA www hotwater com CAUTION TEXT PRINTED OR OUTLINED IN RED CONTAINS INFORMATION RELATIVE...

Page 2: ...96 91 88 82 35 269 LPH 1209 1088 870 806 725 622 604 544 484 435 403 396 363 345 335 311 BTI 154 154 000 81 80 GPH 410 369 295 273 246 211 205 184 164 148 137 134 123 117 113 105 45 307 LPH 1551 1396...

Page 3: ...ent Parts 29 Sequence of Operation Flow Chart 30 Operational Checklist 31 Limited Warranty 32 Page Page FOREWORD These designs comply with ANSI Z21 10 3 as an automatic circulating or automatic storag...

Page 4: ...FOR SAFE OPERATION LIQUID PETROLEUM MODELS Water heaters for propane or liquefied petroleum gas LPG are different from natural gas models A natural gas heater will not function safely on LP gas and no...

Page 5: ...ements Also due to the input rating reduction required at high altitudes the output rating of the appliance is also reduced and should be compensated for in the sizing of the equipment for application...

Page 6: ...es are high a water pressure reducing or flow regulating control valve should be used in 1800 F 82 C line to the dishwashing machine and should be adjusted to deliver water between these limits The Na...

Page 7: ...51mm 2 51mm 12 305mm BTI 250 A 2 51mm 2 51mm 2 51mm 12 305mm BTI 275 A 2 51mm 2 51mm 2 51mm 12 305mm BTI 310 A 3 76mm 3 76mm 3 76mm 12 305mm BTI 366 A 3 76mm 3 76mm 3 76mm 12 305mm BTI 400 A 3 76mm 3...

Page 8: ...nspect the venting system for proper size and horizontal pitch as required in the National Fuel Gas Code ANSI Z223 1 Determine that there is no blockage or restriction leakage corrosion and other defi...

Page 9: ...ches 154 000 1 Ft 6 6 6 6 6 6 6 6 154 000 2 Ft 6 6 6 6 6 6 6 6 154 000 3 Ft 6 6 6 6 6 6 6 6 Number of Combined Input BTI 154 Heaters in Thousands of Btu hr Manifold and Common Vent Diameter Inches 2 3...

Page 10: ...I 310 Input 310 000 Btu hr Total Vent Height Feet Vent Connector Size 6 inches 6 8 10 15 20 30 50 100 Input Btu hr Rise Vent Connector Diameter Inches 310 000 1 Ft 9 8 8 8 7 7 6 6 310 000 2 Ft 8 8 8 7...

Page 11: ...system as a means of detecting the temperature of the outlet water supply RELIEF VALVE This water heater is equipped with a combination temperature pressure relief valve that complies with the standa...

Page 12: ...s resistant to the action of liquefied petroleum gases BEFORE PLACING THE HEATER IN OPERATION CHECK FOR GAS LEAKAGE Use soap and water solution or other material acceptable for the purpose in locating...

Page 13: ...iction AN ELECTRICAL GROUND IS REQUIRED TO REDUCE RISK OF ELECTRICAL SHOCK OR POSSIBLE ELECTROCUTION If any of the original wire as supplied with the appliance must be replaced use only type 1050 C th...

Page 14: ...RATURE CONTROL WARNING ON PAGE 23 IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT ADD AN ANTI SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES GENERAL The type size and lo...

Page 15: ...OULD NOT EXCEED SAFE USE TEMPERATUREAT FIXTURES SEE WATERTEMPERATURE CONTROL WARNING ON PAGE 25 IF HIGHER PREHEAT TEMPERATURES ARE NECESSARYTO OBTAINADEQUATE BOOSTER OUTPUT ADDANANTI SCALD VALVE FOR H...

Page 16: ...OGGLESWITCHMUSTBECLOSED ON DURING THERINSEOPERATIONANDOPEN OFF WHENDISHWASHER IS NOTOPERATING OR WHEN ON LONG STANDBY NOTE 2 INSTALLLINETEMPERATURECONTROLINANUNINSULATED TEEBEYONDTHEDISHWASHINGMACHINE...

Page 17: ...s shown in the installation diagrams on the following pages are typical TWO TEMPERATURE TWO HEATERS ONE PRE HEATER ONE BOOSTER HEATER WITH OR WITHOUT BUILDING RECIRCULATION The discharge opening of th...

Page 18: ...NOTE 3 ADJUST PLUG COCK SO THE SANITIZING LOOP FLOW RATE DOES NOT CAUSE UNNECESSARYTURBULENCEIN THETANK PIPE RELIEF VALVE TO OPEN DRAIN INSTALL IN ACCORDANCE WITH LOCAL CODES CIRCULATING RETURN LINE...

Page 19: ...ERS WITH MIXING VALVE TWO PRE HEATERS WITH BOOSTER HEATER DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES SEE WATER TEMPERATURE CONTROL WARNING ON PAGE 25 IF HIGHER PREHE...

Page 20: ...TER OUTPUT ADD AN ANTI SCALD VALVE FOR HOT WATER SUPPLIEDTO FIXTURES PIPE RELIEF VALVE TO OPEN DRAIN WHEN USING AN A O SMITH T 140 200 350 OR 400 STORAGE TANK USE LOWER 3 4 OPENING FOR TANK TEMPERATUR...

Page 21: ...154 70 BTI 180 70 BTI 199 70 BTI 200 A 72 BTI 250 A 72 BTI 275 A 72 BTI 310 A 73 BTI 366 A 73 BTI 400 A 73 MANIFOLD KITS TWO UNIT MANIFOLD KIT PART NO 195686 THREE UNIT MANIFOLD KIT PART NO 195687 FO...

Page 22: ...filled with water and all air is expelled FILLING 1 Close the heater drain valve by turning handle clockwise 2 Open a nearby hot water faucet to permit the air in the system to escape 3 Fully open th...

Page 23: ...d then shuts off power to the Silicon Nitride Ignitor 11 From the time the Silicon Nitride Ignitor s power is shut off the Ignition Control Board waits 3 more seconds to monitor the Flame Sensor 12 If...

Page 24: ...tes to clear out any gas If you then smell gas STOP Follow B in the safety information above on this label If you don t smell gas go on to the next step 7 Turn gas control knob counterclockwise to ON...

Page 25: ...that attach to faucets to limit hot water temperatures Contact a licensed plumber or the local plumbing authority The water temperature is controlled by a thermostat fig 3 which has two sensing eleme...

Page 26: ...ncrease gas pressure and input rate Counterclockwise to decrease gas pressure and input rate 4 Clock the meter as in step 2 above 5 Repeat steps 3 and 4 until the specified input rate is achieved 6 Tu...

Page 27: ...rs on the heater will usually be damaged when removed New pipe collars will insure that the seal is such as to prevent leakage of flue products when properly installed NOTE Anode rod inspection may ne...

Page 28: ...lied with the kit 2 Remove the container s cap and cut the plastic membrane located in the 3 4 IPT opening in the cap Take care to not damage the threads 3 Find the 3 4 male adapter apply teflon tape...

Page 29: ...hat incorporates a diagnostic system to assist in troubleshooting the appliance The indicator codes on the ignition module are as follows 1 flash System lockout retries or cycles exceeded 2 flashes Pr...

Page 30: ...engages Prover Switch Ignition Control Board provides power to Silicon Nitride Ignitor Silicon Nitride Ignitor warms up for 20 seconds Ignition Control Board opens Gas Valve Ignition Control Board sh...

Page 31: ...metallic sounds Expansion and contraction normal Pounding Air chambers in piping have Drain piping system and refill become waterlogged Heater must be off while this is being done Combustion noises T...

Page 32: ...heater is connected to unless an effective method of controlling thermal expansion is also installed at the heater s and operational at all times The relief valve installed on the heater is not an acc...

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