Manuals / Lochinvar / Household Appliance / Water Heater

Lochinvar 497 - 2067 Ladder diagram continued, Diagrams continued, 0987-20670497-747

Models: 497 - 2067

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Installation & Service Manual

10 Diagrams (continued)

Ladder diagram (continued)

0987-20670497-747

Page 65

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Lochinvar 497 - 2067 service manual Ladder diagram continued, Diagrams continued, 0987-20670497-747

Contents

Installation & Service Manual Models: 497 - CBX-CWX-I-SRev AWHAT TO DO IF YOU SMELL GAS Save this manual for future referenceNOTICE Hazard definitionsContents DANGERInstallation & Service Manual Warranty –Please read before proceeding Special instructionsOwner warning – Safety informationPrevention of freezing – Codes –Installation & Service Manual The Copper-fin- How it worksModels 497 - 747 Rear View Models 497 - 747 Front ViewModels 497 - 747 Right Side inside unit Models 497 - 747 Left Side inside unitModels 987 - 2067 Front View The Copper-fin- How it works... continuedModels 987 - 2067 Rear View Models 987 - 2067 Right Side inside unitRatings Other SpecificationsCopper-fin I=B=R Rating NotesNotes Copper-finSpecificationsInstallation & Service Manual 1 Determine unit location InstallationLocating the unit Indoor clearances from combustible construction1 Determine unit location continued Outdoor boiler installationShut-downand draining Freeze protectionCombustion and Ventilation Air TABLE 1BInstallation & Service Manual 1 Determine unit locationFigure 1-4 Combustionair filter Models Figure 1-3 Combustionair filter ModelsCombustion air filter Installation & Service ManualFigure 1-7_Outsidecombustion air, using ducts 2. Outside Combustion Air, Using DuctsCombustion Air Options 1. Outside Combustion Air, No Ducts3. Combustion Air from an Interior Space Exhaust FansFigure 1-8_Combustionair from an interior space Installation & Service ManualGeneral information 2 VentingVenting support Vertical vent termination clearances and locationBarometric damper location TABLE 2AVent system options Negative draft 1.Conventional negative draft ventingFlue outlet piping Common venting systemsInspection of a masonry chimney Masonry chimney installationInstallation & Service Manual Vertical vent termination clearances and locationOutdoor vent/air inlet location 2. Outdoor installation ventingInstallation & Service Manual 2 VentingFigure 2-7_Outdoorvent cap installed on Models Figure 2-6_Outdoorvent cap installed on ModelsOutdoor vent kit TABLE 2B3 Gas connections Connecting to gas supplyGas piping Gas pressure testGas connection 3 Gas connections continuedTABLE 3B TABLE 3CTABLE 3D Combination gas valvesVenting of combination gas valves Checking gas supply pressureInstallation & Service Manual Gas manifold pressure adjustment3 Gas connections continued NOTICERegulator Pressure Less Front Chamber Pressure TABLE 3E Net Manifold PressureFigure 3-4_Measuringmanifold gas pressure Installation & Service ManualHeating boiler installations Water flow switch4 Water connections Inlet and outlet connectionsCirculator pump specifications Pressure Drop ChartPump delay operation Water connections heating boilers onlyLow system water volume Minimum boiler water temperatures4 Water connections continued Installation & Service ManualTABLE 4A Low temperature return water systemsTABLE 4B Radiant floor and snow melt heating systems4 Water connections continued Installation & Service ManualCOMMON MANIFOLD SIZE Min Models: 497 - NOTICE4 Water connections Installation & Service Manual3 1/2 NOTICEInstallation & Service Manual Figure 4-7_Boilerwith low temperature bypass4 Water connections continued TO FLOOR DRAIN1 TEMPERATURE AND PRESSURE GAUGE AUTOMATIC AIR Installation & Service Manual4 Water connections NOTICETypical heating boiler installations Installation with a chilled water systemBoiler flow rate TABLE - 4CBoiler bypass requirements Temperature / pressure gaugeFilling the system Water treatment5 Electrical connections Connecting to electrical supplyTABLE 5A Figure 5-1_Controlpanel locationFigure 5-5_Fieldinstallation safety devices ENABLEburners Terminal strip connection optionsLocating the temperature control Temperature adjustmentTemperature control settings Figure 5-7_Temperaturecontrol setting knobsFigure 5-8_Optionaloutdoor reset control Outdoor reset optionSetpoint DifferentialInlet water temperature sensor Temperature control sensorsMulti-purposetemperature sensor Outdoor air temperature sensorTABLE 5C Hot surface ignition systemRemote mounting of a sensor Hot surface igniter and ignition control moduleIgnition and control timings Diagnostic Status IndicationFigure 5-12_Hotsurface ignition control module Installation & Service ManualFigure 5-13_Operation /diagnostic lights Operation and diagnostic lightsTABLE 5E TABLE 5DInstallation & Service Manual 6 StartupFigure 6-1_Operatinginstructions Check/control water chemistry Freeze protection when usedFill and test water system Purge air from water systemCheck thermostat circuits Check for gas leaksCheck vent and air piping Start the boilerTABLE - 7A 7 Domestic water heatersTABLE 7B Water velocity controlInstallation & Service Manual 7 Domestic water heaters continuedNOTICE BUILDING HOT WATER SUPPLY RELIEF VALVE LOCK-TEMP7 Domestic water heaters Installation & Service ManualNOTICE BUILDING HOT WATER SUPPLY RELIEF VALVE LOCK-TEMP7 Domestic water heaters continued Installation & Service ManualCOMMON MANIFOLD SIZE Min NOTICE7 Domestic water heaters Installation & Service ManualNOTICE BUILDING HOT WATER SUPPLY RELIEF VALVETABLE 7C Required temperature riseModels 497 - 1/4 HP, 120 VAC, 5.8 Amps Models 987 - 1/2 HP, 120 VAC, 7.4 AmpsDomestic water temperature Potable hot water temperature control settingsTABLE 7D Minimum pump performanceInstallation & Service Manual Location of cold water supply piping connections7 Domestic water heaters continued NOTICEOptional relief valve High water temperature limit controlThermal expansion Cathodic protectionFlue gas passageways cleaning procedure 8 MaintenanceBurner removal and cleaning Appliance areaFan cleaning Heat exchanger cleaningCombustion air fan adjustment Adjusting air pressureAdjustment procedure Models 497 - 8 Maintenance continuedAdjustment procedure: Models 1437, 1797 and Figure 8-2_Airpressure switchSequence of operation Figure 8-6_Adjustingthe air shutterIgnition system checkout OverviewEnd of sequence Heat transfer process8 Maintenance continued Installation & Service ManualON/OFF Rocker Switch Power Supply AC120VAC/60HzManual Reset High-LimitThermostat Safety Device TerminalsTrial for Ignition Ignition Module Function Pump Delay Electronic Thermostat FunctionIgniter Controlled by Ignition Module Hi-LoFire RelayInstallation & Service Manual 10 DiagramsLadder diagram 0987-20670497-747 Ladder diagram continued10 Diagrams continued Installation & Service Manual Connection diagram10 Diagrams 10 Diagrams continued Connection diagram continuedInstallation & Service Manual CBX-CWX-I-SRev A 3/11