Step Test Damper Output | A.O. Smith 120 trough 500 specification

BTR TANK TYPE HEATERS

SERVICE HANDBOOK

	STEP 10	TEST DAMPER OUTPUT

STEP 10. TEST DAMPER OUTPUT. On a call for heat, the damper relays receives power through the yellow wire and power to the motor is interrupted. Then, the motor clutch is disengaged and the damper opens. The damper proves it is open via an end switch before power flows through the red wire from the PC board.

Place the red test probe on the solder joint of the red wire connection to the damper PC board.

IF	THEN
The meter does not read 24 VAC and the	•	Replace the PC board
end switch is closed:
The meter reads 24 VAC	•	Go to step 11.

Note: The spring rotates the damper blade assembly to the open position. This closes an end switch.

A.O. Smith Water Products	26	Service Handbook
Irving, Texas ©2000	26	Training Department

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A.O. Smith 120 trough 500 manual Step Test Damper Output

120 trough 500 specifications

A.O. Smith, a renowned leader in water heating solutions, offers a wide range of products tailored to meet diverse needs. Among its most significant offerings is the A.O. Smith 120 through 500 series, which includes various models designed for both residential and commercial applications.

One of the standout features of the A.O. Smith 120 through 500 series is its efficiency. Many models are designed with advanced thermal insulation and heating technologies, which significantly minimize energy loss. This efficiency not only benefits the environment but also helps users save on energy bills, making these water heaters an economical choice for both homeowners and businesses.

The series includes both gas and electric water heaters, allowing users to select the option that best fits their energy preferences and availability. Gas models typically offer faster heating times and are ideal in areas where natural gas is readily accessible. Conversely, electric models come with a variety of voltage options, accommodating different electrical setups and preferences.

A notable technological advancement in the A.O. Smith 120 through 500 series is the incorporation of smart connectivity options. Some models are equipped with Wi-Fi capabilities, allowing users to monitor and control their water heater remotely via mobile apps. This feature provides real-time data, alerts, and updates, ensuring that users have complete control over their water heating needs.

Moreover, durability is a hallmark of the A.O. Smith brand. The tanks are often constructed from high-quality materials designed to resist corrosion. Many models also feature glass lining and protective coatings, which enhance the lifespan of the heater and minimize the risk of leaks.

Safety is another priority for A.O. Smith. The series is equipped with various safety features such as automatic shut-off mechanisms and temperature controls, ensuring that any potential issues are promptly addressed.

Overall, the A.O. Smith 120 through 500 series encapsulates innovation, efficiency, and reliability. With its versatile offerings and advanced features, it stands as an excellent choice for anyone in need of a dependable water heating solution. Whether for home use or in a commercial setting, these models deliver consistent performance and peace of mind.

Contents

Page BTR Handbook Table of Contents BTR Tank Type Heaters Service Handbook BTR Tank Type Heaters Service Handbook Model BTR Tank Type Heaters Service Handbook InstallationClearances from Combustibles Clearance to Combustibles Table Exterior Clearance Excess AIR AIR for Combustion Cubic Feet of AIR PER 1,000 BTU MAKE-UP AIR Direct CommunicationSquare Inch Per 4,000 Btuh Vertical Ducts Square Inch Per 2,000 Btuh Horizontal Ducts Backdraft Insufficient MAKE-UP AIR Contaminated AIR AIR for CombustionFlammable Items Natural Gas Propane Gas GAS Pressure Requirements BTR GAS Valve Venting Atmospheric Multiple HeatersChimney Draft Inducer Single Unit Installation Power Vent Kits for Sidewall Venting Sequence of Operation BTR Sequence of Operation 100 109 Series BTR Electrical Sequence BTR Electrical Sequence of Operation Troubleshooting BTR Water Heaters Step Test the TransformerThen Step High LIMIT, Left Terminal Test After Push in Reset 24 VAC is now present Reasons For Resetting Condition Cause SolutionStep Test High Limit Right Terminal Step Check the PC Board Step Inspect the Damper Service Switch StepPC Board Motor Test Step Thermostat Test Test from Orange wire to Black neutral Step Damper Input TestTest the Damper Step Test Damper Output Effikal Damper Service SwitchAdapter Test for 24VAC Between Black Common Harness ChartNormal Operation Step a Normal Operation Step BStep C Test for 24VAC Between Black and Yellow On the Damper Board Troubleshooting the Effikal Style DamperStep A1 Test Between Black Common and Brown Step A3 Troubleshooting the Effikal Style Damper Step Wire Harness Test Step IID Module Test Step Pilot Spark Test BTR 120 400 GAS Valve Pilot Valve OHM Test Pilot GAS Manifold Pressure TAP Blue White RED Pilot Valve Test BTR 500 only Step Main Burner Test Flame Rectification Step Flame Rectification Pilot is lit Sparking has stopped Main GAS Valve Check Main GAS Valve Coil Check BTR 500 only Main GAS Valve Coil Check Honeywell Ignition System 110 109 Series BTR Wiring Diagram Natural and Propane GAS General Service Chart When should BTRs be delimed? General Questions and Answers Series BTR Models 197 BTR Models 197 Series Parts Description BTR Parts List for BTR Models 197 and 198 Series 100 Series BTR Models 120 through BTR Models 120 through Series 193873-1 193873-0 Component Part Information Name Specifications AOS Part Numbers BTR Service Checklist Proper Sequence of Operation Comments

BTR TANK TYPE HEATERS

STEP 10

TEST DAMPER OUTPUT

THEN

120 trough 500 specifications