A.O. Smith ***81-140, Установка, обслуживание, техническое обслуживание

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3
FOREWORD
These designs comply with the latest version of the American
National Standard for Gas Water Heaters, Volume III,
ANSI Z21.10.3 - CSA 4.3.
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.
The ***81-140 through ***81-370 models are designed to
operate on either natural or propane gases. HOWEVER, MAKE
SURE the gas on which the heater will operate is the same as
that specified on the heater model and rating plate.
THESE HEATERS MUST NOT BE INSTALLED DIRECTLY ON
COMBUSTIBLE FLOORS.
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.
The installation must conform to these instructions and the local
code authority having jurisdiction. In the absence of local codes
the installation must comply with the latest editions of the National
Fuel Gas Code, ANSI Z223.1/NFPA 54 and the National Electric
Code, NFPA 70. The former is available from the Canadian
Standards Association, 8501 Pleasant Valley Road, Cleveland,
OH 44131 and both documents are available from the National
Fire Protection Association, 1 Batterymarch Park, Quincy,
MA 02269.
TABLE OF CONTENTS
PAGE
FEATURES AND SPECIFICATIONS ........................................... 2
FOREWORD ............................................................................... 3
GENERAL SAFETY INFORMATION
Precautions ............................................................................. 3
Chemical Vapor Corrosion ...................................................... 3-4
Improper Combustion ............................................................. 4
Liquid Petroleum Models ......................................................... 4
Extended Non-Use Periods ..................................................... 4
Insulation Blankets .................................................................. 4
High Altitude Installation ......................................................... 4-5
FEATURES
High Limit Switch (E.C.O.) ...................................................... 5
Circulating Pump ..................................................................... 5
Dishwashing Machine Requirements ...................................... 5
INSTALLATION INSTRUCTIONS
Required Ability ....................................................................... 5
Uncrating ................................................................................. 5
Locating the Heater ................................................................. 5-6
Clearances .............................................................................. 6
Levelling .................................................................................. 6
Hard Water .............................................................................. 6
Air Requirements .................................................................... 6-7
Mechanical Exhausting of Room Air ....................................... 7
Venting .................................................................................... 7
Barometric Draft Control Assembly ........................................ 7
Vent Connection ...................................................................... 7-8
Drain Valve and Access Panels .............................................. 8
Burner Installation ................................................................... 8
Gas Meter Size-City Gases Only ............................................ 8
Gas Pressure Regulation ........................................................ 8-9
Gas Piping ............................................................................... 9
Heater Wiring Instructions ...................................................... 9-10
Water Line Connection .......................................................... 10
Water (Potable) Heating and Spacing .................................. 10
Relief Valve ............................................................................ 10
Thermometers (Not Supplied) ............................................... 10
Wiring for ***81-140 thru ***81-370 ....................................... 11
INSTALLATION DIAGRAMS ...................................................... 12-15
Manifold Kits .......................................................................... 16
PRIOR TO START UP
Required Equipment And Ability .......................................... 17
Purging ................................................................................... 17
Water Temperature Control ................................................... 17
Operation & Adjustment Procedure ...................................... 18
Adjustment Procedure ........................................................... 19-20
MAINTENANCE
Maintenance Schedule ......................................................... 20
Flushing .................................................................................. 20
Draining .................................................................................. 20
Sediment Removal ................................................................ 20
Lime Scale Removal ............................................................. 20-21
Relief Valve ........................................................................... 21
Circulating Pump ................................................................... 21
Power Burner .......................................................................... 21
Vent System ............................................................................ 21
Barometric Draft Control ........................................................ 21-22
Electrical Servicing ................................................................ 22
CHECKLIST AND SERVICE INFORMATION ............................ 22-23
TROUBLESHOOTING ................................................................ 23
Replacement Parts ................................................................. 23
PARTS LIST ................................................................................
24-27
PAGE
GENERAL SAFETY INFORMATION
PRECAUTIONS
DO NOT USE THIS APPLIANCE IF ANY PART HAS BEEN
UNDERWATER. Immediately call a qualified service technician
to inspect the appliance and to replace any part of the control
system and any gas control which has been under water.
IF THE UNIT IS EXPOSED TO THE FOLLOWING, DO NOT
OPERATE HEATER UNTIL ALL CORRECTIVE STEPS HAVE
BEEN MADE BY A QUALIFIED SERVICEMAN.
1. EXTERNAL FIRE.
2. DAMAGE.
3. FIRING WITHOUT WATER.
4 SOOTING.
Heater must be protected from freezing downdrafts during
shutdown periods.
CHEMICAL VAPOR CORROSION
WARNING
CORROSION OF THE FLUEWAYS AND VENT SYSTEM MAY
OCCUR IF AIR FOR COMBUSTION CONTAINS CERTAIN
CHEMICAL VAPORS WHICH BREAK DOWN INTO ACIDS AT
HIGH TEMPERATURE. SUCH CORROSION MAY RESULT IN
FAILURE AND RISK OF ASPHYXIATION.