American Water Heater HCG3 130T 300 Powered Anode Rods, Drain Valve and Access Panels

Page 62

TABLE 15

UN-LIME® Professional Delimer

Part Number

Description

9005416105

4 - 1 gallon (case)

9005417105

1 - 5 gallon

Powered Anode Rods

To insure a long, trouble-free operating life, the water heaters covered in this manual are factory equipped with a powered anode system. The anode rods (2) are of a permanent design and do not need replacing unless damaged. Inspection and cleaning should be performed once a year.

Note: Follow the instructions to drain the water heater storage tank on page 60 first. Remove the powered anodes from the water heater by loosening the 3/4" NPT bushing that forms the top of the anodes. Do not disassemble the retaining nut and wire terminal from the top while installed in the water heater, the anode's electrode may fall inside the tank. Remove the entire anode rod from the water heater prior to inspection. Clean the anode rods with a soft cloth and reinstall. Follow the instructions for filling the water heater on page 50 when finished.

Drain Valve and Access Panels

The water heaters covered in this manual are equipped with a drain valve, see Features And Components on page 7 for location. The water heaters covered in this manual are also equipped with a cleanout opening for sediment and lime scale removal. See Figure 58 on page 61.

Temperature-Pressure Relief Valve Test

Burn hazard.

Hot water discharge.

Keep clear of Temperature- Pressure Relief Valve discharge outlet.

It is recommended that the Temperature-Pressure Relief Valve should be checked to ensure that it is in operating condition every 6 months.

When checking the Temperature-Pressure Relief Valve operation, make sure that (1) no one is in front of or around the outlet of the Temperature-Pressure Relief Valve discharge line, and (2) that the water discharge will not cause any property damage, as the water may be extremely hot. Use care when operating valve as the valve may be hot.

To check the relief valve, lift the lever at the end of the valve several times, see Figure 59. The valve should seat properly and operate freely.

If after manually operating the valve, it fails to completely reset and continues to release water, immediately close the cold water inlet to the water heater and drain the water heater, see Draining And Flushing on page 60. Replace the Temperature- Pressure Relief Valve with a properly rated/sized new one, see Temperature-Pressure Relief Valve on page 15 for instructions on replacement.

TEMPERATURE-PRESSURE

RELIEF VALVE

DISCHARGE PIPE

Figure 59

If the Temperature-Pressure Relief Valve on the water heater weeps or discharges periodically, this may be due to thermal expansion.

Note: Excessive water pressure is the most common cause of Temperature-Pressure Relief Valve leakage. Excessive water system pressure is most often caused by "thermal expansion" in a "closed system." See Thermal Expansion and Closed Water Systems on page 14. The Temperature-Pressure Relief Valve is not intended for the constant relief of thermal expansion.

Temperature-Pressure Relief Valve leakage due to pressure build up in a closed system that does not have a thermal expansion tank installed is not covered under the limited warranty. Thermal expansion tanks must be installed on all closed water systems.

Do not plug the Temperature-Pressure Relief Valve opening. This can cause property damage, serious injury or death.

Explosion Hazard

Temperature-Pressure Relief Valve must comply with ANSI Z21.22- CSA 4.4 and ASME code.

Properly sized temperature- pressure relief valve must be installed in opening provided.

Can result in overheating and excessive tank pressure.

Can cause serious injury or death.

Vent System

Examine the vent system once a year. Points of inspection are as follows:

1.Check for obstructions and/or deterioration of the intake air and/or vent piping and the intake air and vent terminations. Replace immediately where needed.

2.The debris screens in the intake air and vent terminations should be should be cleaned of foreign material and soot. See Figure 22 on page 26.

Note: Do not reach inside the vent hood when the heater is in operation.

3.Check all vent system connections for leakage and repair or reseal as necessary.

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Contents Commercial gas water heaters Table Of Contents Optional Safe Installation, Use and ServiceANSI/NSF-5 Hydrogen Gas Flammable General Safety InformationPrecautions Fire or Explosion Hazard Fire and Explosion HazardIntroduction Preparing For The InstallationQualified Installer or Service Agency Abbreviations UsedFeatures And Components Basic OperationTop View Top View ComponentsSide Views Recovery Capacities Installation ConsiderationsRough In Dimensions Gas Line Connection SizeClearance To Combustible Materials Service ClearanceLocating The Water Heater Intake Air and Vent Pipe ClearancesHard Water Extended Vent TerminationsOptional Concentric Terminations Circulation PumpsGas Pressure Requirements Installation RequirementsPower Supply Supply Gas LineClosed Water Systems Mixing ValvesDishwashing Machines Thermal ExpansionTemperature-Pressure Relief Valve Valve Discharge Pipe RequirementsContaminated Air Condensate DrainCombustible Material Storage Condensate Drain Water TrapConfined Space Air RequirementsUnconfined Space Outdoor Air Through One Opening Fresh Air Openings For Confined SpacesOutdoor Air Through Two Openings Outdoor Air Through Two Horizontal DuctsPage Commonwealth of Massachusetts InspectionGeneral Venting Instructions Venting InstallationGeneral Venting Information Venting Requirements Direct Vent Installation Venting Installation SequencePower Vent Installation Vertical Termination Installation Intake AIR Screen Balance PlateVertical Termination Direct Vent Sidewall Termination Installation Sidewall Termination InstallationConcentric Termination Installation Inch Concentric Termination Flat Roof ClearanceInch Concentric Termination Installation Inch Concentric Termination KITInch Concentric Termination Sidewall Installation Vent Pipe is 4 Inch Schedule 40 PVCFour Concentric Terminations TWO Concentric TerminationsThree Concentric Terminations Eight Concentric TerminationsEight Concentric Terminations Multiple Concentric Termination ArrangementsTwo Concentric Terminations Direct Vent Horizontal Power Vent HorizontalVenting Arrangements Direct Vent Horizontal Concentric Direct Vent Vertical Vent Horizontal IntakeDirect Vent Horizontal Vent Vertical Intake Termination Clearances Sidewall Power Vent Power VentTermination Clearances Sidewall Direct Vent Direct VentInstallation Notes Water Heater InstallationCondensate Drain Installation Installation InstructionsSupply Gas Line Sizing U. S. Units Supply Gas Line InstallationGas Line Sizing Supply Gas Line Sizing Metric UnitsGas Line Connection Supply Gas Regulator InstallationGas Line Leak Testing Enable/Disable Circuit Electrical WiringPower Supply Connections Connecting An External Supervisory ControlValve Discharge Pipe Water Piping DiagramsWater Line Connections Thermometers not SuppliedHigh Temperature Applications Temperature RegulationHigh Temperature Limit Control ECO Thermostat ControlControl System Navigation Control System OperationOverview User Input ButtonsStatus Icons Icon DescriptionControl System Menus Operating StatesState Description Menu DescriptionBack Help User Settings & Control System MenusUpdate Cancel Description/Action DisplayChange Back Help Display Settings Description/Action Heater Information Description/Action DisplayECO Back AdvancedView Back Help YESSelect Back Help UpdateService Contact Information NameInitial Start Up Start UpPrior to Start up Manifold Gas Pressure Adjustment Supply Gas Pressure AdjustmentMultiple Appliance Installations To Turn Off Gas High Altitude InstallationsChecking The Firing Rate Honeywell Lighting The Water HeaterLighting & Operation Label Sequence Of Operation TroubleshootingInstallation Checklist Sequence Of Operation Flow Chart YES noRough Starting, Rough Operation Operational ProblemsInstallation Errors Momentary IgnitionFault And Alert Conditions Fault And Alert Messages Possible Causes Check/Repair Displayed Fault/Alert MessageBlower Prover Failure General MaintenanceMaintenance Schedule Draining And FlushingLime Scale Removal Filling The Water HeaterSediment Removal Temperature-Pressure Relief Valve Test Powered Anode RodsDrain Valve and Access Panels Vent SystemDiagrams CCB Central Control Board LayoutAHCG3 130T 300 Wiring Diagram User Interface ModulAHCG3 130T 400 Wiring Diagram UserCirculation Pump Wiring Diagrams Water Piping Diagrams Temperature & Pressure Tank Temperature ALT. Cold Water American Storage Tank Water Piping Diagrams Line Temperature Control HOT Water Outlet Pipe T&P to Open Drain Finished Floor Limited Warranty