A.O. Smith 120 trough 500 manual General Service Chart

Page 44

BTR TANK TYPE HEATERS

SERVICE WORKBOOK

GENERAL SERVICE CHART

CONDITION

CAUSE

SOLUTION

DAMPER OPENS NO POWER

 

.EFFIKAL – REPLACE DAMPER CONTROL

TO IID MODULE

. DAMPER NOT FULLY OPEN

ASSEMBLY

 

 

 

. REPLACE DAMPER

 

 

. DEFECTIVE PROTECTOR

 

 

 

SWITCH

. REPLACE PC BOARD

PILOT LIGHTS, SPARKS

PILOT FLAME NOT PROVING

SEE FLAME RECTIFICATION - STEP 16

CONTINUOUSLY

 

 

 

 

 

INTERRUPT 120 VAC POWER

HEATER WILL NOT IGNITE

NOT PROVING PILOT

. CHECK GROUND WIRE

FLAME EXISTANCE

ATTACHMENT

 

 

 

 

 

. CLEAN OR REPLACE PILOT

 

 

 

ASSEMBLY

 

 

PILOT GAS NOT COMPLETELY

. CHECK SUPPLY GAS PRESSURE

 

 

INTERRUPTED AT END OF

 

 

. REPLACE GAS VALVE

 

 

HEATING CYCLE

 

 

 

WEEPING TEMPERATURE

. THERMAL EXPANSION

ADD THERMAL EXPANSION TANK

AND

 

 

PRESSURE RELIEF VALVE

 

 

. FAULTY VALVE

REPLACE RELIEF VALVE

 

 

 

 

 

 

LARGE VOLUME WATER

. EXCESSIVE WATER

. CHECK WIRING

RELIEF FROM T&P VALVE

TEMPERATURE

. REPLACE DUAL CONTROLLER

 

 

. FAULTY RELIEF VALVE

REPLACE RELIEF VALVE

 

 

 

 

PREMATURE TANK

CONDENSATION

. INCREASE STORED WATER

LEAKAGE

 

TEMPERATURE AND CONFIRM

 

 

 

PROPERLY SIZED APPLICATION

 

 

 

 

 

 

CONTAMINATED AIR

. REMOVE CONTAMINANTS.

 

 

 

. SUPPLY CLEAN COMBUSTION

 

 

 

AIR.

 

 

WATER HAMMER

. ADD WATER HAMMER

 

 

 

ARRESTOR.

 

 

 

. REDUCE WATER PRESSURE.

 

 

 

. REMOVE UNNECESSARY CHECK

 

 

 

VALVES.

 

 

THERMAL EXPANSION

ADD THERMAL EXPANSION TANK.

 

 

 

 

 

 

DEPLETED ANODES

SCHEDULE ANODE CHECKS -

 

 

 

REPLACE AS NEEDED.

 

 

 

 

DAMPER WILL NOT OPEN

BINDING SHAFT

SUPPORT VENTING

 

 

SHAFT SPRING WEAK/BROKEN

REPLACE DAMPER NON-EFFIKALS

 

 

DAMPER MOTOR

REPLACE MOTOR EFFIKAL-REPLACE DAMPER

 

 

 

CONTROL ASSEMBLY

NO SPARK AT PILOT -

DAMPER ASSEMBLY

REPLACE PC BOARD - SEE STEP 10

DAMPER FULLY OPEN

 

Services Switch may bypass problem until

 

 

 

replacement part is received. (EFFIKAL –

 

 

 

REPLACE DAMPER CONTROL ASSEMBLY

 

 

IID MODULE

REPLACE IID STEP 12

 

 

SPARK CABLE

REPLACE CABLE STEP 13

 

 

 

 

A.O. Smith Water Products

43

Service Handbook

Irving, Texas ©2000

Training Department

Page 43 Page 45
Image 44
Page 43 Page 45
Contents Page BTR Tank Type Heaters Service Handbook BTR Handbook Table of ContentsBTR Tank Type Heaters Service Handbook BTR Tank Type Heaters Service Handbook Installation Clearances from CombustiblesClearance to Combustibles Table ModelExterior Clearance AIR for Combustion Cubic Feet of AIR PER 1,000 BTU Excess AIRSquare Inch Per 4,000 Btuh MAKE-UP AIRDirect Communication Vertical Ducts Horizontal Ducts Square Inch Per 2,000 BtuhInsufficient MAKE-UP AIR BackdraftFlammable Items Contaminated AIRAIR for Combustion GAS Pressure Requirements Natural Gas Propane GasBTR GAS Valve Chimney VentingAtmospheric Multiple Heaters Single Unit Installation Draft InducerPower Vent Kits for Sidewall Venting BTR Sequence of Operation Sequence of OperationBTR Electrical Sequence 100 109 SeriesBTR 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 Inspect the Damper Step Check the PC BoardPC 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 Service SwitchAdapter Effikal DamperHarness Chart Normal OperationStep a Test for 24VAC Between Black CommonStep C Test for 24VAC Between Black and Yellow Normal OperationStep B Troubleshooting the Effikal Style Damper Step A1Test Between Black Common and Brown On the Damper BoardTroubleshooting the Effikal Style Damper Step A3Step Wire Harness Test Step IID Module Test Step Pilot Spark Test Pilot Valve OHM Test BTR 120 400 GAS ValvePilot Valve Test BTR 500 only Pilot GAS Manifold Pressure TAP Blue White REDStep Main Burner Test Step Flame Rectification Flame RectificationPilot is lit Sparking has stopped Main GAS Valve Check Main GAS Valve Coil Check Main GAS Valve Coil Check BTR 500 onlyBTR Wiring Diagram Natural and Propane GAS Honeywell Ignition System 110 109 SeriesGeneral Service Chart General Questions and Answers When should BTRs be delimed?BTR Models 197 SeriesBTR Models 197 Series Parts List for BTR Models 197 and 198 Series 100 Parts Description BTRBTR Models 120 through SeriesBTR Models 120 through Series 193873-1 193873-0 Name Specifications AOS Part Numbers Component Part InformationBTR 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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