A.O. Smith 120 trough 500 manual Harness Chart, Normal Operation, Step a, Brown

Page 29

BTR TANK TYPE HEATERS

SERVICE HANDBOOK

HARNESS CHART

Heater Harness

Function

Damper Harness

Black

24V Hot

1-Brown

Yellow

24V from Therm

2-Orange

Red

24V from damper

3-Yellow

White

24V common

4-Black

Series 110 and 111 heaters and converted model BTR(C) and BTC heaters with Effikal

Dampers.

NORMAL OPERATION

Condition:

Heater on standby

Damper closed

High Limit closed

 

 

Wires are from left to right:

 

 

Black i Yellow i Brown i White

 

 

 

 

 

STEP A

TEST FOR 24VAC BETWEEN BLACK (COMMON)

AND BROWN

STEP A. TEST FOR 24VAC BETWEEN BLACK (COMMON) AND BROWN

IF

THEN

24VAC is present

Continue to Step B.

24VAC is not present

See Troubleshooting Step A1

A.O. Smith Water Products

28

Service Handbook

Irving, Texas ©2000

Training Department

Image 29
Contents Page BTR Handbook Table of Contents BTR Tank Type Heaters Service HandbookBTR Tank Type Heaters Service Handbook Clearances from Combustibles BTR Tank Type Heaters Service Handbook InstallationClearance to Combustibles Table ModelExterior Clearance Excess AIR AIR for Combustion Cubic Feet of AIR PER 1,000 BTUSquare Inch Per 4,000 Btuh MAKE-UP AIRDirect Communication Vertical Ducts Square Inch Per 2,000 Btuh Horizontal DuctsBackdraft Insufficient MAKE-UP AIRFlammable Items Contaminated AIRAIR for Combustion Natural Gas Propane Gas GAS Pressure RequirementsBTR GAS Valve Chimney VentingAtmospheric Multiple Heaters 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 Then Troubleshooting BTR Water HeatersStep Test the Transformer Step High LIMIT, Left Terminal Test Step Test High Limit Right Terminal After Push in Reset 24 VAC is now presentReasons For Resetting Condition Cause Solution Step Check the PC Board Step Inspect the DamperPC Board Motor Test Service SwitchStep Step Thermostat Test Test the Damper Test from Orange wire to Black neutralStep Damper Input Test Step Test Damper Output Effikal Damper Service SwitchAdapterNormal Operation Harness ChartStep a Test for 24VAC Between Black CommonStep C Test for 24VAC Between Black and Yellow Normal OperationStep B Step A1 Troubleshooting the Effikal Style DamperTest Between Black Common and Brown On the Damper BoardStep 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.