American Water Heater HCG3 130T 300 instruction manual Temperature-Pressure Relief Valve

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Temperature-Pressure Relief Valve

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.

This water heater is provided with a properly rated/sized and certified combination Temperature-Pressure Relief Valve (T&P valve) by the manufacturer. The valve is certified by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment of materials as meeting the requirements for Relief Valves for Hot Water Supply Systems, ANSI Z21.22 • CSA 4.4, and the code requirements of ASME.

If replaced, the new T&P valve must meet the requirements of local codes, but not less than a combination Temperature- Pressure Relief Valve rated/sized and certified as indicated in the above paragraph. The new valve must be marked with a maximum set pressure not to exceed the marked hydrostatic working pressure of the water heater (150 psi = 1,035 kPa) and a discharge capacity not less than the water heater Btu/hr or kW input rate as shown on the water heater’s model rating label.

Note: In addition to the factory installed Temperature-Pressure Relief Valve on the water heater, each remote storage tank that may be installed and piped to a water heating appliance must also have its own properly sized, rated and approved Temperature- Pressure Relief Valve installed. Call the toll free technical support phone number listed on the back cover of this manual for technical assistance in sizing a Temperature-Pressure Relief Valve for remote storage tanks.

For safe operation of the water heater, the Temperature-Pressure Relief Valve must not be removed from its designated opening nor plugged. The Temperature-Pressure Relief Valve must be installed directly into the fitting of the water heater designed for the relief valve. Install discharge piping so that any discharge will exit the pipe within 6 inches (15.2 cm) above an adequate floor drain, or external to the building. In cold climates it is recommended that it be terminated at an adequate drain inside the building. Be certain that no contact is made with any live electrical part. The discharge opening must not be blocked or reduced in size under any circumstances. Excessive length, over 30 feet (9.14 m), or use of more than four elbows can cause restriction and reduce the discharge capacity of the valve.

No valve or other obstruction is to be placed between the Temperature-Pressure Relief Valve and the tank. Do not connect discharge piping directly to the drain unless a 6” (15.2 cm) air gap is provided. To prevent bodily injury, hazard to life, or property damage, the relief valve must be allowed to discharge

water in adequate quantities should circumstances demand. If the discharge pipe is not connected to a drain or other suitable means, the water flow may cause property damage.

CAUTION

Water Damage Hazard

Temperature-Pressure Relief Valve discharge pipe must terminate at adequate drain.

T&P Valve Discharge Pipe Requirements:

Shall not be smaller in size than the outlet pipe size of the valve, or have any reducing couplings or other restrictions.

Shall not be plugged or blocked.

Shall not be exposed to freezing temperatures.

Shall be of material listed for hot water distribution.

Shall be installed so as to allow complete drainage of both the Temperature-Pressure Relief Valve and the discharge pipe.

Must terminate a maximum of six inches above a floor drain or external to the building. In cold climates, it is recommended that the discharge pipe be terminated at an adequate drain inside the building.

Shall not have any valve or other obstruction between the relief valve and the drain.

Burn hazard.

Hot water discharge.

Keep clear of Temperature- Pressure Relief Valve discharge outlet.

The Temperature-Pressure Relief Valve must be manually operated at least twice a year. Caution should be taken to ensure that (1) no one is in front of or around the outlet of the Temperature-Pressure Relief Valve discharge line, and (2) the water manually discharged will not cause any bodily injury or property damage because the water may be extremely hot. 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, follow the draining instructions in this manual, and replace the Temperature-Pressure Relief Valve with a properly rated/sized new one.

Note: The purpose of a Temperature-Pressure Relief Valve is to prevent excessive temperatures and pressures in the storage tank. The T&P valve is not intended for the constant relief of thermal expansion. A properly sized thermal expansion tank must be installed on all closed systems to control thermal expansion, see Closed Water Systems and Thermal Expansion on page 14.

If you do not understand these instructions or have any questions regarding the Temperature-Pressure Relief Valve call the toll free number listed on the back cover of this manual for technical assistance.

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Contents Commercial gas water heaters Table Of Contents Safe Installation, Use and Service ANSI/NSF-5Optional General Safety Information PrecautionsHydrogen Gas Flammable Fire and Explosion Hazard Fire or Explosion HazardAbbreviations Used Preparing For The InstallationQualified Installer or Service Agency IntroductionBasic Operation Features And ComponentsTop View Components Top ViewSide Views Gas Line Connection Size Installation ConsiderationsRough In Dimensions Recovery CapacitiesIntake Air and Vent Pipe Clearances Service ClearanceLocating The Water Heater Clearance To Combustible MaterialsCirculation Pumps Extended Vent TerminationsOptional Concentric Terminations Hard WaterSupply Gas Line Installation RequirementsPower Supply Gas Pressure RequirementsThermal Expansion Mixing ValvesDishwashing Machines Closed Water SystemsValve Discharge Pipe Requirements Temperature-Pressure Relief ValveCondensate Drain Water Trap Condensate DrainCombustible Material Storage Contaminated AirAir Requirements Unconfined SpaceConfined Space Outdoor Air Through Two Horizontal Ducts Fresh Air Openings For Confined SpacesOutdoor Air Through Two Openings Outdoor Air Through One OpeningPage Inspection Commonwealth of MassachusettsVenting Installation General Venting InformationGeneral Venting Instructions Venting Requirements Venting Installation Sequence Power Vent InstallationDirect Vent Installation Intake AIR Screen Balance Plate Vertical Termination InstallationVertical Termination Direct Vent Sidewall Termination Installation Sidewall Termination InstallationInch Concentric Termination Flat Roof Clearance Concentric Termination InstallationInch Concentric Termination KIT Inch Concentric Termination InstallationVent Pipe is 4 Inch Schedule 40 PVC Inch Concentric Termination Sidewall InstallationEight Concentric Terminations TWO Concentric TerminationsThree Concentric Terminations Four Concentric TerminationsMultiple Concentric Termination Arrangements Two Concentric TerminationsEight Concentric Terminations Power Vent Horizontal Venting ArrangementsDirect Vent Horizontal Direct Vent Vertical Vent Horizontal Intake Direct Vent Horizontal Vent Vertical IntakeDirect Vent Horizontal Concentric Power Vent Termination Clearances Sidewall Power VentDirect Vent Termination Clearances Sidewall Direct VentInstallation Instructions Water Heater InstallationCondensate Drain Installation Installation NotesSupply Gas Line Sizing Metric Units Supply Gas Line InstallationGas Line Sizing Supply Gas Line Sizing U. S. UnitsSupply Gas Regulator Installation Gas Line Leak TestingGas Line Connection Connecting An External Supervisory Control Electrical WiringPower Supply Connections Enable/Disable CircuitThermometers not Supplied Water Piping DiagramsWater Line Connections Valve Discharge PipeThermostat Control Temperature RegulationHigh Temperature Limit Control ECO High Temperature ApplicationsUser Input Buttons Control System OperationOverview Control System NavigationIcon Description Status IconsMenu Description Operating StatesState Description Control System MenusDescription/Action Display User Settings & Control System MenusUpdate Cancel Back HelpChange Back Help Heater Information Description/Action Display Display Settings Description/ActionYES Back AdvancedView Back Help ECOName UpdateService Contact Information Select Back HelpStart Up Prior to Start upInitial Start Up Supply Gas Pressure Adjustment Multiple Appliance InstallationsManifold Gas Pressure Adjustment High Altitude Installations Checking The Firing RateTo Turn Off Gas Lighting The Water Heater Lighting & Operation LabelHoneywell Troubleshooting Installation ChecklistSequence Of Operation YES no Sequence Of Operation Flow ChartMomentary Ignition Operational ProblemsInstallation Errors Rough Starting, Rough OperationFault And Alert Conditions Possible Causes Check/Repair Displayed Fault/Alert Message Fault And Alert MessagesBlower Prover Failure Draining And Flushing MaintenanceMaintenance Schedule GeneralFilling The Water Heater Sediment RemovalLime Scale Removal Vent System Powered Anode RodsDrain Valve and Access Panels Temperature-Pressure Relief Valve TestCCB Central Control Board Layout DiagramsUser Interface Modul AHCG3 130T 300 Wiring DiagramUser AHCG3 130T 400 Wiring DiagramCirculation 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