A.O. Smith 120 trough 500 manual Step Flame Rectification

Page 39

BTR TANK TYPE HEATERS

SERVICE HANDBOOK

STEP 16

FLAME RECTIFICATION

STEP 16. FLAME RECTIFICATION

Note: Flame rectification means that an alternating current (AC) signal is changed to a direct current (DC) signal. The pilot flame is the 'switch' which connects the pilot hood to the igniter and ground. If the pilot hood and igniter sensor had the same surface area, the flame 'switch' would conduct an AC signal. Because the pilot surface is greater than the igniter surface, the signal becomes a DC current that the module can interpret. The pilot hood must be properly grounded and the pilot flame must remain in contact with both surfaces for the flame proving signal to remain constant.

If the signal is broken for just 8 tenths of a second, the heater will cycle off.

Sparking at the pilot will continue if an insufficient signal is received by the module.

Sparking at the pilot will stop almost immediately after the ignition module senses the pilot flame.

IF

THEN

Sparking continues after pilot is

•

Check wire connections

established:

• Check flame contact between hood

 

 

and lighter

 

• Clean pilot burner surfaces

 

•

Replace pilot assembly

Sparking stops:

• Go to step 17.

A.O. Smith Water Products

38

Service Handbook

Irving, Texas ©2000

Training Department

Page 38 Page 40
Image 39
Page 38 Page 40
Contents Page BTR Handbook Table of Contents BTR Tank Type Heaters Service HandbookBTR Tank Type Heaters Service Handbook Model BTR Tank Type Heaters Service Handbook InstallationClearances from Combustibles Clearance to Combustibles TableExterior Clearance Excess AIR AIR for Combustion Cubic Feet of AIR PER 1,000 BTUMAKE-UP AIR Direct CommunicationSquare Inch Per 4,000 Btuh Vertical Ducts Square Inch Per 2,000 Btuh Horizontal DuctsBackdraft Insufficient MAKE-UP AIRContaminated AIR AIR for CombustionFlammable Items Natural Gas Propane Gas GAS Pressure RequirementsBTR GAS Valve Venting Atmospheric Multiple HeatersChimney Draft Inducer Single Unit InstallationPower Vent Kits for Sidewall Venting Sequence of Operation BTR Sequence of Operation100 109 Series BTR Electrical SequenceBTR 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 DamperService 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 SwitchAdapterTest for 24VAC Between Black Common Harness ChartNormal Operation Step aNormal 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 BrownStep A3 Troubleshooting the Effikal Style DamperStep Wire Harness Test Step IID Module Test Step Pilot Spark Test BTR 120 400 GAS Valve Pilot Valve OHM TestPilot GAS Manifold Pressure TAP Blue White RED Pilot Valve Test BTR 500 onlyStep Main Burner Test Flame Rectification Step Flame RectificationPilot is lit Sparking has stopped Main GAS Valve Check Main GAS Valve Coil Check BTR 500 only Main GAS Valve Coil CheckHoneywell Ignition System 110 109 Series BTR Wiring Diagram Natural and Propane GASGeneral Service Chart When should BTRs be delimed? General Questions and AnswersSeries BTR Models 197BTR Models 197 Series Parts Description BTR Parts List for BTR Models 197 and 198 Series 100Series BTR Models 120 throughBTR Models 120 through Series 193873-1 193873-0 Component Part Information Name Specifications AOS Part NumbersBTR Service Checklist Proper Sequence of Operation Comments

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.
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