A.O. Smith BPD-400 - Manual (Page 4)

4
These designs comply with the current version of the American National
Standard for Gas Water Heaters, Volume III, ANSI Z21.10.3 / CSA 4.3 as
automatic circulating tank water heaters, and automatic storage water
heaters.
Detailed installation diagrams are found in this manual. These diagrams will
serve to provide the installer with a reference for the materials and methods
of piping necessary. It is highly essential that all water, gas piping and
wiring be installed as shown on the diagrams.
Particular attention should be given to the installation of thermometers at
the locations indicated on the diagrams as these are necessary for checking
the proper functioning of the heater.
In addition to these instructions, the equipment shall be installed in
accordance with those installation regulations in force in the local area
where the installation is to be made. These shall be carefully followed in all
cases. Authorities having jurisdiction should be consulted before
installations are made.
In the absence of local codes, the installation must comply with the current
editions of the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and the
National Electric Code. The former is available from the Canadian Standards
Association, 8501 East Pleasant Valley Road, Cleveland, OH 44131, and
both documents are available from the National Fire Protection Association,
1 Batterymarch Park, Quincy, MA 02269.
FOREWORD
TABLE OF CONTENTS
ROUGH-IN DIMENSIONS ................................................................... 2
TYPICAL INSTALLATION .................................................................. 3
FOREWARD ...................................................................................... 4
GENERAL SAFETY INFORMATION .................................................. 5
Precautions .................................................................................. 5
Chemical Vapor Corrosion ........................................................... 5
Improper Combustion ................................................................... 5
Extended Nonuse Periods ........................................................... 5
Insulation Blankets ....................................................................... 5
High Altitude Installations ............................................................. 5
FEATURES ........................................................................................ 6
The Eliminator ............................................................................... 6
High Limit Switch (E.C.O.) ............................................................ 6
Circulating Pump ........................................................................... 6
Dishwashing Machine Requirement ............................................ 6
Electronic Ignition Control ............................................................. 7
Pilot Assembly .............................................................................. 7
Gas Valve ..................................................................................... 7
Pressure Switch .......................................................................... 7
Step Down Transformer .............................................................. 8
Burner Tray Assembly ................................................................. 8
Burner Tray .................................................................................. 8
Burner .......................................................................................... 8
Burner Orifice .............................................................................. 8
Blower Assembly ......................................................................... 8
High Limit Switch .......................................................................... 9
Shroud Assembly ......................................................................... 9
Temperature and Pressure Release Valve ................................. 9
INSTALLATION INSTRUCTIONS ........................................................ 9
Required Ability ............................................................................ 9
Hard Water ................................................................................... 9
Locating the Heater ...................................................................... 9
Leveling ........................................................................................ 9
Clearances ................................................................................... 10
Alcove Installation ........................................................................ 10
Air Requirements ......................................................................... 10
COMBUSTION AIR AND EXHAUST ................................................... 10
Venting Clearances ...................................................................... 10
Facts to Consider About the Location ......................................... 11
Wire Fence ................................................................................... 11
Water Piping ................................................................................. 12
Temperature-Pressure Relief Valve ............................................ 12
PAGE PAGE
Filling the Water Heater ................................................................ 13
Wiring ........................................................................................... 13
Venting ......................................................................................... 15
Venting Through Roof .................................................................. 19
GAS PIPING ....................................................................................... 20
Sediment Trap .............................................................................. 20
INSTALLATION CHECKLIST .............................................................. 21
Operating Instructions for Model 100-400 .................................. 22
Operational Sequence (Natural Gas Models Only) ..................... 22
Safety Sequence (Natural Gas Models Only) ............................. 22
Robertshaw Control System (Natural Gas) ................................ 22
FOR YOUR SAFETY ......................................................................... 23
Operating Instructions ................................................................. 23
To Turn Off Gas to Appliance ...................................................... 23
Temperature Regulation ............................................................... 24
Temperature Adjustments ............................................................ 24
START UP CONDITIONS .................................................................... 24
Condensation ............................................................................... 24
Smoke/Odor .................................................................................. 25
Thermal Expansion ....................................................................... 25
Strange Sounds ........................................................................... 25
OPERATIONAL CONDITIONS ............................................................ 25
Smelly Water ................................................................................ 25
Air in Hot Water Faucets ............................................................. 25
Venting Manual Reset Switch ...................................................... 25
High Temperature Shut Off System ............................................. 25
E.C.O. ........................................................................................... 25
Not Enough or No Hot Water ........................................................ 25
Water Is Too Hot ........................................................................... 26
Venting System Inspection .......................................................... 26
Burner Inspection ......................................................................... 26
Burner Cleaning ........................................................................... 26
Housekeeping .............................................................................. 27
Draining ........................................................................................ 27
Service ......................................................................................... 27
INSTALLATION DIAGRAMS .............................................................. 28
Manifold Kits ................................................................................. 33
Sediment Removal ........................................................................ 34
Lime Scale Removal ..................................................................... 34
Anode Inspection and Replacement ............................................ 34
Replacement Parts ....................................................................... 34
MODEL BPD 400 LIMITED WARRANTY ............................................ 35