A.O. Smith BTI 120 - Manuals

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Manual

Manual A.O. Smith BTI 120

Summary

Page 3 - TABLE OF CONTENTS; FOREWORD

3 TABLE OF CONTENTS ROUGH-IN-DIMENSIONS ................................................ 2 FOREWORD ..................................................................... 3 GENERAL SAFETY INFORMATION .................................. 4 Precautions .......................................................

Page 4 - WARNING; WARNING

4 GENERAL SAFETY INFORMATION PRECAUTIONS DO NOT USE THIS APPLIANCE IF ANY PART HAS BEEN UNDERWATER. Immediately call a qualified service technician to inspectthe appliance and to replace any part of the control system andany gas control which has been under water. IF THE UNIT IS EXPOSED TO THE FOLLO...

Page 5 - HIGH ALTITUDE INSTALLATIONS; FEATURES; THE ELIMINATOR; HIGH LIMIT SWITCH

5 • Do not apply insulation to the top of the water heater, as this will interfere with safe operation of drafthood. • Do not cover the temperature & pressure relief valve.• Do not cover the instruction manual. Keep it on the side of the water heater or nearby for future reference. • Do obtain n...

Page 6 - INSTALLATION INSTRUCTIONS

6 ELECTRONIC IGNITION CONTROL Each heater is equipped with a ignition module. The solid stateignition control (Fig. 4), ignites the main burner by utilizing asilicone nitride ignitor. The silicone nitride ignitor shuts off duringthe heating cycle and the main burner flame is sensed througha remote f...

Page 7 - LEVELING; HARD WATER

7 WARNING FLAMMABLE ITEMS, PRESSURIZED CONTAINERS OR ANY OTHER POTENTIAL FIRE HAZARDOUS ARTICLES MUSTNEVER BE PLACED ON OR ADJACENT TO THE HEATER. OPENCONTAINERS OR FLAMMABLE MATERIAL SHOULD NOT BESTORED OR USED IN THE SAME ROOM WITH THE HEATER. When installing the heater, consideration must be give...

Page 8 - VENTING; MULTIPLE HEATER MANIFOLD

8 AND ONE IN OR WITHIN 12 INCHES (30.5cm) OF THEENCLOSURE BOTTOM. Each opening shall have a free area ofat least one square inch per 1000 Btuh (2,225mm 2 /kW)of the total input of all appliances in the enclosure, but not less than100 square inches (645 square cm).If the confined space is within a bu...

Page 9 - TECHNICAL DATA VENTING

9 TYPE B GAS VENT Multiple Gas Fired Tank-Type Heaters When venting multiple tank type heaters using Type Bvent pipe, follow the installation diagram (figure 4) andtables below which give sizing and data based uponNFPA 54/ANSI Z223. 1992. TECHNICAL DATA VENTING MODEL BTI-120Input: 120,000 Btu/hr Tot...

Page 11 - WATER LINE CONNECTIONS; CAUTION; RELIEF VALVE; GAS PIPING

11 WATER LINE CONNECTIONS This manual provides detailed installation diagrams (see pages15-21 of this manual) for typical methods of application for thewater heaters. The water heater may be installed by itself, or with a separatestorage tank, on both single and two-temperature systems.When used wit...

Page 12 - PURGING; GAS PRESSURE REGULATOR; TABLE 7

12 MALFUNCTION OF THE SUPPLY SYSTEM, THE GAS VALVEMUST BE CHECKED FOR SAFE OPERATION. MAKE SURETHAT THE OUTSIDE VENTS ON THE SUPPLY REGULATORSAND THE SAFETY VENT VALVES ARE PROTECTED AGAINSTBLOCKAGE. THESE ARE PARTS OF THE GAS SUPPLY SYSTEM,NOT THE HEATER. VENT BLOCKAGE MAY OCCUR DURINGICE STORMS. T...

Page 13 - HEATER WIRING

13 HEATER WIRING All electrical work must be installed in accordance with the latestversion of the National Electrical Code ANSI/NFPA No. 70, mustconform to all local code authority having jurisdiction. AN ELECTRICAL GROUND IS REQUIRED TO REDUCE RISK OFELECTRICAL SHOCK OR POSSIBLE ELECTROCUTION. If ...

Page 14 - INSTALLATION DIAGRAMS-TOP INLET/OUTLET USAGE; CODE RESTRICTIONS; DANGER; GENERAL

14 INSTALLATION DIAGRAMS-TOP INLET/OUTLET USAGE Use of the top inlet water connection requires installation of aninlet dip tube (refer to figure 11). The tube is supplied in theheater. Follow caution labels if applying heat to this fitting. Do notallow pipe dope to contact the plastic tube during in...

Page 15 - VERTICAL STORAGE TANK AND FORCED CIRCULATION; HORIZONTAL STORAGE TANK AND FORCED CIRCULATION

15 VERTICAL STORAGE TANK AND FORCED CIRCULATION DANGER T E M P E R AT U R E S E T T I N G S H O U L D N O T E X C E E D S A F E U S ETEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROLWARNING ON PAGE 25. IF HIGHER PREHEAT TEMPERATURES ARENECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SC...

Page 16 - TWO TEMPERATURE - ONE HEATER HIGH TEMPERATURE STORAGE

16 DANGER T E M P E R AT U R E S E T T I N G S H O U L D N O T E X C E E D S A F E U S ETEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROLWARNING ON PAGE 25. IF HIGHER PREHEAT TEMPERATURES ARENECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES....

Page 17 - INSTALLATION DIAGRAMS-SIDE INLET/OUTLET USAGE; WITH OR WITHOUT BUILDING RECIRCULATION

17 INSTALLATION DIAGRAMS-SIDE INLET/OUTLET USAGE DANGER T E M P E R AT U R E S E T T I N G S H O U L D N O T E X C E E D S A F E U S ETEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROLWARNING ON PAGE 25. IF HIGHER PREHEAT TEMPERATURES ARENECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-S...

Page 21 - MANIFOLD KITS; TWO UNIT MANIFOLD KIT

21 MODEL DIMENSION “A” BTI-120 63” BTI-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) FOUR UNIT MANIFOLD KIT (PART NO. 195688)

Page 22 - OPERATION; IMPORTANT

22 TABLE 8 APPROXIMATE TIME REQUIRED TO CONSUME 1 CU. FT. OF GAS AT FULL CAPACITY TIME REQ’D INPUT TYPE BTUH TO CONSUME RATE OF PER 1 CU. FT. (BTUH) GAS CU. FT. OF GAS 120,000 NATURAL 1050 31.5 SEC. (35kW) PROPANE 2500 75.0 SEC. 154,000 NATURAL 1050 24.5 SEC. (45kW) PROPANE 2500 58.4 SEC. 180,000 NA...

Page 23 - SEQUENCE OF OPERATION

23 SEQUENCE OF OPERATION The following information will describe the Sequence ofOperation 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 Contro...

Page 24 - FOR YOUR SAFETY READ BEFORE OPERATING

24 A. This appliance does not have a pilot. It is equippedwith an ignition device which automatically lights theburner. Do not try to light the burner by hand. B. BEFORE OPERATING smell all around the appliance areafor gas. Be sure to smell next to the floor becausesome gas is heavier than air and w...

Page 25 - WATER TEMPERATURE CONTROL; PREVENTIVE MAINTENANCE; CHECK THE IGNITOR ASSEMBLY

25 WATER TEMPERATURE CONTROL DANGER THIS WATER HEATER IS EQUIPPED WITH AN ADJUSTABLETHERMOSTAT TO CONTROL WATER TEMPERATURE. HOTWATER TEMPERATURES REQUIRED FOR AUTOMATICDISHWASHER AND LAUNDRY USE CAN CAUSE SCALDBURNS RESULTING IN SERIOUS PERSONAL INJURY AND/OR DEATH. THE TEMPERATURE AT WHICH INJURY ...

Page 28 - DELIMING SOLVENTS; TANK CLEANOUT PROCEDURE

28 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. O. Smith part no. 99038. 6. Install cleanout plate. Be sure to draw plate up tight by tightening screws securely. 7. Replace outer jacket cove...

Page 29 - SERVICE; ELECTRICAL SERVICING

29 7. Lower container, you may have to place the container on its empty carton to prevent the UN•LIME from flowing back intothe container. 8. Let UN•LIME remain in the heater for 5 minutes and then lower the container to the "Drain" Position, see Figure 16. 9. Deliming activity is indicated ...

Page 30 - SEQUENCE OF OPERATION FLOW CHART

30 SEQUENCE OF OPERATION FLOW CHART Description of this flow chart can be found in the “SEQUENCE OF OPERATION” section found on page 23. Switch power on to unit. Thermostat calls for heat. Ignition Control Board performs diagnostic check on components Ignition Control Board sends power to Exhaust In...

Page 31 - OPERATIONAL CHECKLIST

31 REMEDY COMPLAINT CAUSE USER SERVICEMAN *Water not hot enough. Thermostat set too low. Set thermostat dial to a higher temperature. Thermostat out of calibration. Call serviceman Recalibrate thermostat. If thermostat cannot be recalibrated, replace. *Insufficient hot water Thermostat set too low. ...

Page 32 - Model BTI Limited Warranty

32 Model BTI Limited Warranty A. O. Smith Corporation, the warrantor, extends the following LIMITED WARRANTY to the owner of this water heater. 1. THE TANK 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 ...