A.O. Smith BT- 80 - Manuals

Page 2 - FOREWORD

2 FOREWORD The design of models BT-80 and 100 comply with the current editionof ANSI Z21.10.3-CSA 4.3 as automatic storage or automaticcirculating tank type water heaters. Installation diagrams are found in this manual. These diagramswill serve to provide the installer with a reference for the mater...

Page 3 - PRECAUTIONS; CHEMICAL VAPOR CORROSION; TABLE OF CONTENTS; WARNING; LIQUID PETROLEUM MODELS

3 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 and anygas control which has been under water. IF THE UNIT IS EXPOSED TO THE FOLLO...

Page 4 - INSTALLATION INSTRUCTIONS

4 IF YOU EXPERIENCE AN OUT-OF-GAS SITUATION, DO NOT TRYTO RELIGHT APPLIANCES YOURSELF , ask your LP delivery person to relight pilots for you. Only trained LP professionals should conductthe required safety checks in accordance with industry standards. EXTENDED NON-USE PERIODS WARNING HYDROGEN GAS C...

Page 5 - HIGH ALTITUDE INSTALLATIONS; CLEARANCES

5 Drain pans suitable for these heaters are available from yourdistributor or A. O. Smith Water Products Company, 500 TennesseeWaltz Parkway, Ashland City, TN 37015. Water heater life depends upon water quality, water pressure and theenvironment in which the water heater is installed. Water heaters ...

Page 7 - RELIEF VALVE

7 VENT CONNECTION Vent connections must be made to an adequate stack or chimney.Size and install proper size vent pipe. Do not reduce pipe size toless than that of the draft hood outlet. Horizontal runs of vent pipe must have a minimum upward slopetoward the chimney of 1/4 inch per foot. Dampers or ...

Page 8 - GAS PIPING

8 GAS PIPING Contact your local gas service company to ensure that adequategas service is available and to review applicable installation codesfor your area. Size the main gas line in accordance with Table 1. The figures shownare for straight lengths of pipe at 0.5 in. W.C. pressure drop, whichis co...

Page 9 - GAS PRESSURE REGULATOR; OPERATION; TO OPERATE THE WATER HEATER

9 FIGURE 6-THERMOSTAT FOR NATURAL AND PROPANE GASES GAS PRESSURE REGULATOR The gas pressure regulator is built into the gas valve and is equippedto operate on the gas specified on model and rating plate. Theregulator is factory adjusted to deliver gas to burner at correct watercolumn pressure allowi...

Page 11 - FOR YOUR SAFETY READ BEFORE LIGHTING; LIGHTING INSTRUCTIONS

11 FOR YOUR SAFETY READ BEFORE LIGHTING • If you cannot reach your gas supplier, call thefire department. C. Use only your hand to push down or turn the gascontrol knob. Never use tools. If the knob will notpush down or turn by hand, don’t try to repair it, calla qualified service technician. Force ...

Page 13 - HIGH TEMPERATURE LIMIT SWITCH; SERVICE INFORMATION; PILOT AND MAIN BURNER

13 WARNING FAILURE TO CORRECT BACK DRAFTS MAY CAUSE AIRCONTAMINATION AND UNSAFE CONDITIONS. • If the back draft cannot be corrected by the normal method or ifa suitable draft cannot be obtained, a blower type flue gasexhauster must be employed to assure proper venting andcorrect combustion. HIGH TEM...

Page 15 - PREVENTIVE MAINTENANCE; RECOMMENDED PROCEDURE FOR PERIODIC; DELIMING SOLVENTS; TANK CLEANOUT PROCEDURE

15 PREVENTIVE MAINTENANCE RECOMMENDED PROCEDURE FOR PERIODIC REMOVAL OF LIME DEPOSITS FROM TANK TYPE COMMERCIAL WATER HEATERS The amount of calcium carbonate (lime) released from water is indirect proportion to water temperature and usage, see chart. Thehigher the water temperature or water usage, t...

Page 16 - CHECKLIST

16 DELIMING USING FLO-JUG METHOD UN•LIME in the 5 gallon size is recommended for deliming of theBT-80 and 100 models. UN•LIME with the necessary hoses andfittings to delime your heater is also available as a kit: Up-N-DownTransfer Kit. Contact your local A.O. Smith dealer, distributor or,A.O. Smith ...

Page 18 - Model BT Limited Warranty

18 Model BT 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 w...