A.O. Smith SBD 30 150 warranty GAS Valves, Checking the Input, Venting System

Page 21

NOTE:

1.Remove main burners from unit.

2.Check that burner venturi and ports are free of foreign debris.

3.Clean burners with bristle brush and/or vacuum cleaner - DO NOT distort burner ports or pilot location.

4.Reinstall burners in unit. Make sure front and rear of burners are installed correctly in burner support brackets.

Also check for good flow of combustion and ventilating air to the unit. Maintain a clear area around the heater at all times.

GAS VALVES

Figure 13 shows the type of combination manual gas control valve and regulator used on these heaters.

If the gas valve becomes defective, repairs should not be attempted. A new valve should be installed in place of the defective one.

FIGURE 13

CHECKING THE INPUT

For appliance installation locations with elevations above 2000 feet, refer to HIGH ALTITUDE INSTALLATIONS section of this manual for input reduction procedure.

1.Attach a pressure gauge or a manometer to the gauge port and refer to the GAS PRESSURE REGULATOR section for correct manifold pressure.

2.Use this formula to “clock” the meter. Be sure that other gas consuming appliances are not operating during this interval.

3600 X H = Btuh

T

T = Time in seconds to burn one cubic foot of gas. H = Btu’s per cubic foot of gas.

Btuh = Actual heater input. Example:

T = 15.1 seconds H = 1050 Btu Btuh = ?

19 X 1050 = 199,999 Btuh

Should it be necessary to adjust the gas pressure to the burners to obtain the full input rate, the steps below should be followed:

3.Remove the regulator adjustment sealing cap, fig. 13, and adjust the pressure by turning the adjusting screw with a screwdriver.

Clockwise to increase 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.Turn the gas control knob to PILOT. Remove the pressure gauge and replace the sealing cap and the allen wrench set screw in the pressure tap opening.

WARNING

UNDERNOCIRCUMSTANCESSHOULDTHE GASINPUTEXCEED THE INPUT SHOWN ON THE HEATER MODEL AND RATING PLATE. OVERFIRING COULD RESULT IN DAMAGE OR SOOTING OF THE HEATER.

When the heater is operating at full capacity, or full gas input, it should consume 1 cu. ft. of gas in time indicated on Table 3.

TABLE 3

APPROXIMATE TIME REQUIRED TO CONSUME

1 CU. FT. OF GASAT FULL CAPACITY

 

 

 

TIMEREQ’D

INPUT

TYPE

BTUH

TOCONSUME

RATE

OF

PER

1 CU. FT.

(BTUH)

GAS

CU. FT.

OF GAS

154,000

NATURAL

1050

24.5 SEC.

199,000

NATURAL

1050

19.0 SEC.

Figures shown are valid for 0-2000 ft.(0-610m) installations. See “HIGH ALTITUDE INSTALLATIONS” for deration requirements over 2000 ft.(610m).

VENTING SYSTEM

Examine the venting system every six months for obstructions and/or deterioration of the vent piping.

Remove all soot or other obstructions from chimney which will retard free draft.

REMOTE STORAGE TANK

TEMPERATURE CONTROL

The water temperature in the storage tank (if used) is controlled by the storage tank temperature control. The sensing element is mounted in the hot water storage tank, see page 17.

A change in water temperature in the storage tank lower than the tank temperature control setting will cause the sensor to activate the circulating pump. The pump then circulates the water through the heater where the thermostat senses the drop in water temperature and activates main burner operation of the appliance. If the storage tank temperature control is out of calibration, replace with new control.

WARNING

SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL TO SHUT OFF, TURN OFF THE MANUAL GAS CONTROL VALVE TO THE APPLIANCE.

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Contents Andnotifyownertokeepforfuturereference PlacetheseinstructionsadjacenttoheaterLindahl Parkway Ashland CITY, TNROUGH-IN-DIMENSIONS Recovery Rating Capacities GPH AT Temperature Rise ShownForeword Table of Contents Features Electronic Ignition Control Exhaust Inducer Blower AssemblyCirculating Pump Dishwashing Machine RequirementUncrating Required AbilityLocating the Heater LevelingConfinedspace VentingWater Line Connections Multiple Heater ManifoldWater Potable Heating Space Heating Relief ValvePurging GAS PipingGAS Pressure Regulator Length Nominal Iron Pipe Sizes Inches FeetSingle Unit Wiring Diagram Heater WiringGeneral Installation DiagramsHorizontal Storage Tank and Forced Circulation Vertical Storage Tank and Forced CirculationPage Circulating Return Line Connection Installation DIAGRAMS-SIDE INLET/OUTLET UsageHeater with Mixing Valve and Recirculated Sanitizing Loop TWO PRE-HEATERS with Booster Heater Horizontal Storage Tank Sequence of Operation OperationWhat to do if YOU Smell GAS For Your Safety Read Before OperatingWater Temperature Control Preventive MaintenanceCheck the Ignitor Assembly Ignitor AssemblyGAS Valves Remote Storage Tank Temperature ControlChecking the Input Venting SystemAnode ROD Inspection HOT Water OdorFlushing DrainingTank Cleanout Procedure Deliming Using FLO-JUG MethodDeliming Solvents System Diagnostics ServiceReplacement Parts Ignition Module SystemYES Sequence of Operation Flow ChartOperational Checklist Complaint Cause User ServicemanRemedy Claimprocedure ServiceandrepairexpensesKeepthiswarrantypostedadjacenttotheheaterforfuturereference TankLindahl Parkway Ashland City, TN Phone 800-821-2017 Fax

SBD 30 150 specifications

The A.O. Smith SBD 30 150 is a high-efficiency water heater designed to meet the hot water needs of residential applications. Renowned for its reliability and performance, this model exemplifies A.O. Smith's commitment to innovative technology and energy efficiency.

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In conclusion, the A.O. Smith SBD 30 150 water heater stands out as a practical and efficient solution for anyone in need of reliable hot water. With its impressive features, energy-saving technologies, and robust design, it is a smart investment for long-lasting performance and comfort in everyday life.
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