Manuals / Lochinvar / Household Appliance / Water Heater

Lochinvar 497 - 2067 service manual Models 497 - 747 Front View, Models 497 - 747 Rear View, 22 25

Models: 497 - 2067

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Installation & Service Manual

The Copper-fin - How it works...

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Lochinvar 497 - 2067 Models 497 - 747 Front View, Models 497 - 747 Rear View, Models 497 - 747 Right Side inside unit

Contents

WHAT TO DO IF YOU SMELL GAS CBX-CWX-I-SRev AInstallation & Service Manual Models: 497 - Save this manual for future referenceContents Hazard definitionsNOTICE DANGERPlease read before proceeding Warranty –Installation & Service Manual Special instructionsPrevention of freezing – Safety informationOwner warning – Codes –The Copper-fin- How it works Installation & Service ManualModels 497 - 747 Right Side inside unit Models 497 - 747 Front ViewModels 497 - 747 Rear View Models 497 - 747 Left Side inside unitModels 987 - 2067 Rear View The Copper-fin- How it works... continuedModels 987 - 2067 Front View Models 987 - 2067 Right Side inside unitCopper-fin I=B=R Rating Other SpecificationsRatings NotesCopper-finSpecifications Installation & Service ManualNotes Locating the unit Installation1 Determine unit location Indoor clearances from combustible constructionShut-downand draining Outdoor boiler installation1 Determine unit location continued Freeze protectionInstallation & Service Manual TABLE 1BCombustion and Ventilation Air 1 Determine unit locationCombustion air filter Figure 1-3 Combustionair filter ModelsFigure 1-4 Combustionair filter Models Installation & Service ManualCombustion Air Options 2. Outside Combustion Air, Using DuctsFigure 1-7_Outsidecombustion air, using ducts 1. Outside Combustion Air, No DuctsFigure 1-8_Combustionair from an interior space Exhaust Fans3. Combustion Air from an Interior Space Installation & Service ManualVenting support 2 VentingGeneral information Vertical vent termination clearances and locationTABLE 2A Vent system optionsBarometric damper location Flue outlet piping 1.Conventional negative draft ventingNegative draft Common venting systemsInstallation & Service Manual Masonry chimney installationInspection of a masonry chimney Vertical vent termination clearances and locationInstallation & Service Manual 2. Outdoor installation ventingOutdoor vent/air inlet location 2 VentingOutdoor vent kit Figure 2-6_Outdoorvent cap installed on ModelsFigure 2-7_Outdoorvent cap installed on Models TABLE 2BGas piping Connecting to gas supply3 Gas connections Gas pressure testTABLE 3B 3 Gas connections continuedGas connection TABLE 3CVenting of combination gas valves Combination gas valvesTABLE 3D Checking gas supply pressure3 Gas connections continued Gas manifold pressure adjustmentInstallation & Service Manual NOTICEFigure 3-4_Measuringmanifold gas pressure TABLE 3E Net Manifold PressureRegulator Pressure Less Front Chamber Pressure Installation & Service Manual4 Water connections Water flow switchHeating boiler installations Inlet and outlet connectionsPump delay operation Pressure Drop ChartCirculator pump specifications Water connections heating boilers only4 Water connections continued Minimum boiler water temperaturesLow system water volume Installation & Service ManualTABLE 4B Low temperature return water systemsTABLE 4A Radiant floor and snow melt heating systemsCOMMON MANIFOLD SIZE Min Models: 497 - Installation & Service Manual4 Water connections continued NOTICE3 1/2 Installation & Service Manual4 Water connections NOTICE4 Water connections continued Figure 4-7_Boilerwith low temperature bypassInstallation & Service Manual TO FLOOR DRAIN4 Water connections Installation & Service Manual1 TEMPERATURE AND PRESSURE GAUGE AUTOMATIC AIR NOTICEBoiler flow rate Installation with a chilled water systemTypical heating boiler installations TABLE - 4CFilling the system Temperature / pressure gaugeBoiler bypass requirements Water treatmentTABLE 5A Connecting to electrical supply5 Electrical connections Figure 5-1_Controlpanel locationburners ENABLEFigure 5-5_Fieldinstallation safety devices Terminal strip connection optionsTemperature control settings Temperature adjustmentLocating the temperature control Figure 5-7_Temperaturecontrol setting knobsSetpoint Outdoor reset optionFigure 5-8_Optionaloutdoor reset control DifferentialMulti-purposetemperature sensor Temperature control sensorsInlet water temperature sensor Outdoor air temperature sensorRemote mounting of a sensor Hot surface ignition systemTABLE 5C Hot surface igniter and ignition control moduleFigure 5-12_Hotsurface ignition control module Diagnostic Status IndicationIgnition and control timings Installation & Service ManualTABLE 5E Operation and diagnostic lightsFigure 5-13_Operation /diagnostic lights TABLE 5D6 Startup Figure 6-1_OperatinginstructionsInstallation & Service Manual Fill and test water system Freeze protection when usedCheck/control water chemistry Purge air from water systemCheck vent and air piping Check for gas leaksCheck thermostat circuits Start the boilerTABLE 7B 7 Domestic water heatersTABLE - 7A Water velocity controlNOTICE 7 Domestic water heaters continuedInstallation & Service Manual BUILDING HOT WATER SUPPLY RELIEF VALVE LOCK-TEMPNOTICE Installation & Service Manual7 Domestic water heaters BUILDING HOT WATER SUPPLY RELIEF VALVE LOCK-TEMPCOMMON MANIFOLD SIZE Min Installation & Service Manual7 Domestic water heaters continued NOTICENOTICE Installation & Service Manual7 Domestic water heaters BUILDING HOT WATER SUPPLY RELIEF VALVEModels 497 - 1/4 HP, 120 VAC, 5.8 Amps Required temperature riseTABLE 7C Models 987 - 1/2 HP, 120 VAC, 7.4 AmpsTABLE 7D Potable hot water temperature control settingsDomestic water temperature Minimum pump performance7 Domestic water heaters continued Location of cold water supply piping connectionsInstallation & Service Manual NOTICEThermal expansion High water temperature limit controlOptional relief valve Cathodic protectionBurner removal and cleaning 8 MaintenanceFlue gas passageways cleaning procedure Appliance areaCombustion air fan adjustment Heat exchanger cleaningFan cleaning Adjusting air pressureAdjustment procedure: Models 1437, 1797 and 8 Maintenance continuedAdjustment procedure Models 497 - Figure 8-2_Airpressure switchIgnition system checkout Figure 8-6_Adjustingthe air shutterSequence of operation Overview8 Maintenance continued Heat transfer processEnd of sequence Installation & Service ManualManual Reset High-LimitThermostat Power Supply AC120VAC/60HzON/OFF Rocker Switch Safety Device TerminalsIgniter Controlled by Ignition Module Pump Delay Electronic Thermostat FunctionTrial for Ignition Ignition Module Function Hi-LoFire Relay10 Diagrams Ladder diagramInstallation & Service Manual Ladder diagram continued 10 Diagrams continued0987-20670497-747 Connection diagram 10 DiagramsInstallation & Service Manual Connection diagram continued Installation & Service Manual10 Diagrams continued CBX-CWX-I-SRev A 3/11