A.O. Smith BTX-80 SERIES 100 instruction manual Vent Pipe Assembly, Venting

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Never use this water heater unless it is completely full of water. To prevent damage to the tank, the tank must be filled with water. Water must flow from the hot water faucet before turning “ON” gas to the water heater.

To fill the water heater with water:

1.Close the water heater drain valve by turning handle to the right

(clockwise). The drain valve is on the lower front of water heater.

2.Open the cold water supply valve to the water heater.

NOTE: The cold water supply valve must be left open when the water heater is in use.

3.To insure complete filling of the tank, allow air to exit by opening nearest hot water faucet. Allow water to run until a constant flow is obtained.

This will let air out of the water heater and the piping.

4.Check all water piping and connections for leaks. Repair as needed.

VENT PIPE ASSEMBLY

There are three parts of the vent pipe assembly that connect the water heater exhaust (located on lower back side of water heater) to inlet of the blower assembly (mounted on top of water heater) as shown in Figure 1. These parts will need to be assembled according to these instructions.

Assemble Vent Pipe Assemblies #1, #2 and #3 (See Figure 1) prior

to cementing. The preferred orientation of Vent Pipe Assembly #1

(Condensate U-Assembly) is shown in Figure 16. However this

assembly may be rotated to a different orientation as needed for the

specific installation requirements. Note the rotational orientation of

each part by marking a line several inches long across the joints.The long tube of Vent Pipe Assembly #2 should be approximately vertical. If it is found that either of the two pieces of pipe in Vent Pipe Assembly

#2 are too long for proper fit-up, then remove as little material as possible to improve the fit-up. Keep in mind that the pipes will insert

slightly further into the elbows when cement is applied as it acts as a lubricating agent. The vertical distance from the bottom of the

Condensate U-Assembly to the floor that supports the water heater

should be approximately 0.25” (0.64 cm), see Figure 16. Disassemble the parts and cement back together using the alignment marks. After the cement dries, attach the assembly to the blower and the water heater exhaust using the supplied rubber boots and hose clamps.

Acondensate trap is incorporated in the bottom of this vent pipe assembly. See the CONDENSATE section of this manual for further details.

VENTING

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Contents 197086-004 Power Vented GAS Models W/HOT Surface IgnitionWhenever maintenance adjustment or service is required PrintedApprovals Safe INSTALLATION, USE and ServiceImportant Definitions General Safety Information General Safety Information Introduction Table of ContentsExemptions Installation of Carbon Monoxide DetectorsApproved Carbon Monoxide Detectors SignageReplacement Parts and Deliming Products Typical InstallationElbow Access Door Condensate Hose and Drain PAN Mixing Valves Recovery capacity based on 90% thermal efficiency ROUGH-IN-DIMENSIONSRough-In-Dimensions Capacity and Gas and Electrical CharacteristicsFacts to Consider About the Location Locating the NEW Water HeaterAir REQUIREMENTs Insulation BlanketsOutdoor Air Through Two Openings Unconfined SpaceConfined Space Fresh Air Openings For Confined SpacesOutdoor AIR Through TWO Vertical Ducts Outdoor AIR Through TWO Horizontal DuctsAIR from Other Indoor Spaces Space Heating and Potable Water System Installing the NEW Water HeaterChemical Vapor Corrosion Water Piping Thermal Expansion Temperature-Pressure Relief Valve Valve and Pipe Insulation if supplied Contact qualified installer or service agency High Altitude InstallationGas Piping Filling the Water Heater Sediment TrapsPer square inch 3.5 kPa Venting Vent Pipe AssemblyVent Pipe Termination Termination Clearances Sidewall Power VentCondensate Planning the Vent SystemBreathing Hazard Carbon Monoxide Gas Installation of Vent System Blower Assembly InstallationVent Terminal INSTALLATION, Sidewall Pointed in the correct position, see Figure Power Vent Wiring Schematic FigureChisel an opening approximately one half inch 1.3 cm larger Than the marked circleInstallation of Vertical Vent System Installation of Vent SYSTEM, SidewallVent attenuation assembly Flexible tubing Instruction sheet Vent Attenuation Assembly InstallationVertical VAA Installations Recommended Inch vent Vertical VAA Installations Recommended BRUSH* Size for Primer Cement Applications Vent Pipe PreparationStep G Step BStep E Step FDo not TRY to Light the Burner by Hand Power Before ServicingDo not try to light the burner by hand What to do if YOU Smell GASD E F Temperature RegulationTemperature Indicators Temperature Adjustment Buttons DisplayStart UP Conditions For Your InformationOperational Conditions Anode ROD Inspection Periodic MaintenanceOpen the water heater drain valve to flush the storage tank Temperature-Pressure Relief Valve TestKeep hands clear of drain To Flush the Water Heater Storage TankLeakage Checkpoints ServiceTrouble Shooting Troubleshooting GuidelinesUnplug ignitor assembly plug from control. Check resistance Ensure the flame sensor is clean use ultra fine steelTurn off power to the water heater Assembly if damaged or defectiveCheck vent temperature limit switch if it is determined Unplug the ignitor assembly plug from the control. CheckResistance of the black resistor wire between pins Assembly .2 If the reading taken is less than 100,000Troubleshooting Guidelines ALL Other Parts Service and Repair ExpensesClaim Procedure Tank
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