A.O. Smith BTX-80 SERIES 100 Ignition/flame failure, Maximum number of retries and is

Page 36

TROUBLESHOOTING GUIDELINES

WATER HEATER CONTROL

TROUBLE SHOOTING

Please check guidelines below. For your safety, water heater service should be performed only by a qualified service technician.

Read the GENERAL SAFETY INFORMATION section first.

INTELLI-VENT TROUBLESHOOTING CHART - USER CONTROL

#

LED STATUS

PROBLEM

SOLUTION

6

B C D E F

Ignition/flame failure.

1. Gas supply is turned off-pressure too low. Ensure supply and

 

The water heater has reached the

manifold gas pressures are within requirements in installation

 

 

manual. Manifold gas pressure is non-adjustable if pressure is

 

 

maximum number of retries and is

off by more than 0.3” W.C. (75 Pa) replace Intelli-Vent™ control.

 

 

currently locked out for one hour.

2. Low supply voltage - should be 115 -125 VAC.

 

 

 

 

 

Cycle the power to the water heater

3. Ensure flame sensor is making good contact with burner

 

 

off and on to reset.

flame, ensure flame is steady see #8 below.

 

 

Service Note:

4. Ensure the flame sensor is clean - use ultra fine steel

 

 

The resistance (ohms) of a hot surface

wool or Scotch-Brite™ pad to clean flame sensor.

 

 

ignitor will increase over time. If the

5. Ensure the hot surface ignitor is positioned to provide

 

 

resistance at room temperature is near

 

 

consistent ignition.

 

 

18.8 ohms - consider replacing the ignitor

 

 

6. Check for any cracks in ignitor assembly ceramic

 

 

as a preventative measure.

 

 

 

insulators - replace ignitor assembly if damaged.

 

 

 

7. Check resistance of ignitor at room temperature (77ºF)

 

 

 

(25°C) at the plug end. Replace ignitor if resistance is

 

 

 

not within 11.5 and 18.8 ohms at room temperature.

 

 

 

8. Ensure correct size of vent pipe (2”, 3”, 4”) was used per

 

 

 

installation manual for vent length. Using larger pipe than required

 

 

 

may cause excessive air turbulance in combustion chamber.

 

 

 

 

7

B C D E F

Self diagnostic tests have found a problem

1. Turn the power off for 10-20 seconds then on again to

 

with the gas valve driver circuit, internal

clear these error codes.

 

 

microprocessor, or other internal circuits.

2. If any of these error codes persist or cannot be cleared-

8

B C D E F

 

replace the Intelli-Vent™ control.

 

 

 

9

B C D E F

 

 

 

 

 

 

 

 

 

10

B C D E F

Flame signal has been sensed out of

1. Turn the power off for 10-20 seconds and then on again

 

proper sequence.

to clear this error code.

 

 

 

2. Replace the Intelli-Vent™ control if this error code persists.

 

 

 

 

 

B C D E F

Water temperature in the tank has

1. Turn the power off for 10-20 seconds then on again

11

exceeded 195°F (91°C) and has

to clear this error code.

 

 

 

activated the ECO.

2. Replace the Intelli-Vent™ if the error code persists.

 

 

 

 

 

 

 

 

 

The self diagnostic check detected one

1. Press and release temperature adjust buttons. If above

12

B C D E F

or both of the temperature adjust buttons

action does not clear error, control will continue to regulate

 

 

are stuck.

water temperature at last setting. However, settings will no

 

 

 

longer be adjustable - the control should be replaced.

 

 

 

 

 

B C D E F

The self diagnostic test has detected the

1. Turn power off for 10-20 seconds then on again to

13

 

water temperature sensor (thermistor) is

clear this error code.

 

 

either open or shorted.

2. Replace the Intelli-Vent™ control if this error code persist.

 

 

 

14

B C D E F

Self-diagnostic test found a problem with black

1. Turn off power to the water heater.

 

resistor wire on the ignitor assembly plug; resistor

2. Insure black resistor wire is not cut, missing, and is installed

 

 

wire is open or shorted.

between pins 3 & 4 of ignitor assembly plug. Replace ignitor

 

 

Service Note: To perform this test ohm meter

assembly if damaged or defective.

 

 

3. Unplug ignitor assembly plug from control. Check resistance

 

 

used must be capable of reading up to 2,000,000

of black resistor wire between pins 3 & 4 with an ohm meter.

 

 

ohms. Unless ohm meter used has an auto-range

3.1 If reading taken is less than 2000 (5000 for date code 0617

 

 

feature resistance should be checked twice. First

through 0709) or more than 1.7 million ohms, replace ignitor

 

 

reading will be taken using an ohms scale above

assembly. 3.2 If reading taken is between 2000 (5000 for date

 

 

1,700,000 ohms. Second reading is taken using

code 0617 through 0709) and 1.7 million ohms, replace

 

 

ohms scale just above 2,000 or 5,000 ohms.

Intelli- Vent™ control.

 

 

 

Service Note: Raised ridges on ignitor assembly plug identify

 

 

 

#1, #2, and #3 pins. The four-digit date code can be found on

 

 

 

side of the controller.

 

 

 

 

36

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Contents Power Vented GAS Models W/HOT Surface Ignition Whenever maintenance adjustment or service is requiredPrinted 197086-004Safe INSTALLATION, USE and Service ApprovalsImportant Definitions General Safety Information General Safety Information Table of Contents IntroductionInstallation of Carbon Monoxide Detectors Approved Carbon Monoxide DetectorsSignage ExemptionsTypical Installation Replacement Parts and Deliming ProductsElbow Access Door Condensate Hose and Drain PAN Mixing Valves ROUGH-IN-DIMENSIONS Rough-In-DimensionsCapacity and Gas and Electrical Characteristics Recovery capacity based on 90% thermal efficiencyLocating the NEW Water Heater Facts to Consider About the LocationInsulation Blankets Air REQUIREMENTsUnconfined Space Confined SpaceFresh Air Openings For Confined Spaces Outdoor Air Through Two OpeningsOutdoor AIR Through TWO Horizontal Ducts Outdoor AIR Through TWO Vertical DuctsAIR from Other Indoor Spaces Installing the NEW Water Heater Chemical Vapor CorrosionWater Piping Space Heating and Potable Water SystemTemperature-Pressure Relief Valve Thermal ExpansionValve and Pipe Insulation if supplied High Altitude Installation Contact qualified installer or service agencyGas Piping Sediment Traps Filling the Water HeaterPer square inch 3.5 kPa Vent Pipe Assembly VentingTermination Clearances Sidewall Power Vent Vent Pipe TerminationPlanning the Vent System CondensateBreathing Hazard Carbon Monoxide Gas Blower Assembly Installation Installation of Vent SystemVent Terminal INSTALLATION, Sidewall Power Vent Wiring Schematic Figure Chisel an opening approximately one half inch 1.3 cm largerThan the marked circle Pointed in the correct position, see FigureInstallation of Vent SYSTEM, Sidewall Installation of Vertical Vent SystemVent Attenuation Assembly Installation Vent attenuation assembly Flexible tubing Instruction sheetVertical VAA Installations Recommended Inch vent Vertical VAA Installations Vent Pipe Preparation Recommended BRUSH* Size for Primer Cement ApplicationsStep B Step EStep F Step GPower Before Servicing Do not try to light the burner by handWhat to do if YOU Smell GAS Do not TRY to Light the Burner by HandTemperature Regulation Temperature Indicators Temperature Adjustment ButtonsDisplay D E FFor Your Information Start UP ConditionsOperational Conditions Periodic Maintenance Anode ROD InspectionTemperature-Pressure Relief Valve Test Keep hands clear of drainTo Flush the Water Heater Storage Tank Open the water heater drain valve to flush the storage tankService Leakage CheckpointsTroubleshooting Guidelines Trouble ShootingEnsure the flame sensor is clean use ultra fine steel Turn off power to the water heaterAssembly if damaged or defective Unplug ignitor assembly plug from control. Check resistanceUnplug the ignitor assembly plug from the control. Check Resistance of the black resistor wire between pinsAssembly .2 If the reading taken is less than 100,000 Check vent temperature limit switch if it is determinedTroubleshooting Guidelines Service and Repair Expenses Claim ProcedureTank ALL Other Parts

BTX-80 SERIES 100 specifications

The A.O. Smith BTX-80 Series 100 is a cutting-edge heating solution designed for effective and efficient water heating. This model is particularly well-suited for residential applications, offering an impressive balance of performance and energy efficiency.

One of the standout features of the BTX-80 Series 100 is its innovative design, which incorporates a high-efficiency condensing technology. This allows the unit to capture and utilize heat that would otherwise be lost in traditional systems, thereby maximizing energy usage and reducing overall operating costs. With an impressive energy factor (EF) rating, this water heater contributes to lower utility bills while promoting environmental sustainability.

The BTX-80 is equipped with a powerful 80-gallon tank, providing ample hot water for households of varying sizes. Its large capacity ensures that multiple appliances can operate simultaneously without running out of hot water, making it an ideal choice for families with high demand. The model also incorporates a robust heating element that ensures rapid recovery and maintains consistent water temperatures.

Safety and convenience are paramount in the design of the BTX-80. It features a comprehensive digital control system that allows users to set precision temperature settings according to their needs. The intuitive interface simplifies adjustments and monitoring, while safety mechanisms like temperature and pressure relief valves provide peace of mind during operation.

A.O. Smith has also prioritized quality and durability in the construction of the BTX-80 Series 100. The tank is made from high-quality materials and comes with a robust enamel coating that resists corrosion and extends its lifespan. Additionally, the unit is backed by a lengthy warranty, reflecting the manufacturer's confidence in its longevity.

Installation and maintenance are straightforward with the BTX-80, as it is designed to fit seamlessly into existing plumbing configurations. Furthermore, the unit operates quietly, ensuring minimal disruption in the home environment.

In conclusion, the A.O. Smith BTX-80 Series 100 stands out in the market as a reliable, energy-efficient, and user-friendly water heating solution. With its advanced technologies and emphasis on safety and durability, it proves to be a smart investment for any household looking to improve their hot water system.
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