OPERATION

IMPORTANT

A qualified person must perform the initial firing of the heater. At this time the user should not hesitate to ask the individual any questions which they may have in regard to the operation and maintenance of the unit.

An Operational Checklist is included at the rear of this manual. By using this checklist the user may be able to make minor operational adjustments and avoid unnecessary service calls. However, the user should not attempt repairs which are not listed under the USER column.

GENERAL

NEVER OPERATE THE HEATER WITHOUT FIRST BEING CERTAIN IT IS FILLED WITH WATER AND A TEMPERATURE AND PRESSURE RELIEF VALVE IS INSTALLED IN THE RELIEF VALVE OPENING OF THE HEATER.

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

CAUTION

Before proceeding with the operation of the unit make sure the water heater and system are filled with water and all air is expelled.

FILLING

1.Close the heater drain valve by turning handle clockwise.

2.Open a nearby hot water faucet to permit the air in the system to escape.

3.Fully open the cold water inlet pipe valve allowing the heater and piping to be filled.

4.Close the hot water faucet as water starts to flow.

5.The heater is ready to be operated.

WARNING

THE GAS VALVE MUST HAVE BEEN IN THE OFF POSITION FOR AT LEAST 5 MINUTES. This waiting period is an important safety step. Its purpose is to permit gas that may have accumulated in the combustion chamber to clear. IF YOU DETECT GAS ODOR AT THE END OF THIS PERIOD DO NOT PROCEED WITH LIGHTING. RECOGNIZE THAT GAS EVEN IF IT SEEMS WEAK, MAY INDICATE PRESENCE OFACCUMULATED GAS SOMEPLACE IN THE AREA WITH RISK OF FIRE OR EXPLOSION. SEE THE FRONT PAGE FOR STEPS TO BE TAKEN.

All gas and water lines leak tested and open.

Read SEQUENCE OF OPERATION section of this manual prior to lighting and operating this appliance.

With above conditions satisfied, start the unit in accordance with the instructions on the Operating label attached to the heater. If label instructions are not legible - determine which gas valve the appliance is equipped with and use the applicable OPERATING INSTRUCTIONS as follows:

Each heater is equipped with an ignition control board. The controller will try three times to light the main burner before going

into lockout. After the controller tries three times, it will wait one hour before trying to light the unit again. This cycle will continue until the main burners are ignited or the unit is shut down.

ADJUSTMENTS

ON INITIAL STARTUP SOMEADJUSTMENTS ARE NECESSARY.

1.CHECK MANIFOLD AND INLET GAS PRESSURES.

2.CYCLECHECK-CHECKATLEASTONEBURNEROPERATION - WHEN THERMOSTAT IS SATISFIED, BURNER WILL SHUT OFF AND INDUCER WILL STOP RUNNING. ON CALL FOR HEAT - THE INDUCER WILL COME ON AND CLOSE THE PRESSURE SWITCH AND THE IGNITION SEQUENCE DESCRIBED ABOVE WILL BEGIN, SEE “SEQUENCE OF OPERATION”.

SEQUENCE OF OPERATION

The following information will describe the Sequence of Operation 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 Control Board sends signal to Exhaust Inducer.

5.Exhaust Inducer begins drawing air through appliance closing the Prover Switch.

6.On completion of Prover Switch engagement, the Ignition Control Board begins the ignition cycle.

7.The Ignition Control Board provides power to the Silicon Nitride Ignitor.

8.The Silicon Nitride Ignitor heats up for approximately 17 to 20 seconds.

9.At the end of Silicon Nitride Ignitor’s warm-up, the Ignition Control Board opens the Gas Valve.

10.From the time the Gas Valve opens, the Ignition Control Board waits 3 seconds and then shuts off power to the Silicon Nitride Ignitor.

11.From the time the Silicon Nitride Ignitor’s power is shut off, the Ignition Control Board waits 3 more seconds to monitor the Flame Sensor.

12.If the Flame Sensor does not detect a strong enough flame, the Ignition Control Board shuts off the Gas Valve and allows the Exhaust Inducer to purge the unit for 20 seconds. At that time, the Ignition Control Board restarts with step 7. It will try and ignite the main burners 2 more times. If the unit does not light, the Ignition Control Board will wait one hour and then restart at step 3. This cycle will continue until the unit lights or the power is shutoff to the unit.

13.If the Flame Sensor detects a strong flame, the Ignition Control Board will allow the unit to operate until the thermostat is satisfied.

14.Once the unit is satisfied, the Ignition Control Board will shut off the Gas Valve and the unit will be in standby mode until another call for heat is initiated by the thermostat.

See the flow chart on page 25 for more information.

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A.O. Smith SBD 30 150 warranty Sequence of Operation
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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.

One of the standout features of the A.O. Smith SBD 30 150 is its capacity. With a 30-gallon tank, it is ideally suited for small to medium-sized households. This makes it an excellent choice for families or individuals who require a steady supply of hot water for various applications like bathing, cooking, and cleaning.

The SBD 30 150 is equipped with a powerful, efficient heating element that delivers quick recovery rates. This means that users can expect hot water when they need it without long waiting times. The advanced insulation technology employed in its design reduces heat loss, allowing the unit to maintain a steady temperature and operate at optimal efficiency.

Energy efficiency is a key characteristic of the A.O. Smith SBD series. It features Energy Star certification, demonstrating its ability to provide hot water while minimizing energy consumption. Users can enjoy the dual benefit of reduced energy bills and a smaller carbon footprint. This model is particularly appealing to eco-conscious consumers looking to integrate green technologies into their homes.

In terms of durability, the SBD 30 150 is built with high-quality materials designed to withstand the test of time. Its glass-lined tank provides excellent corrosion resistance, which is essential for extending the lifespan of the unit. Additionally, the heater includes a durable anode rod, which serves to protect the tank from galvanic corrosion, further enhancing its longevity.

Convenience features are also notable in this model. It comes with a thermostat that allows for easy temperature control, enabling users to set the preferred hot water temperature without hassle. Moreover, the compact design of the SBD 30 150 makes it easy to install in various settings, whether it’s a small utility area or a basement.

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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