Manuals / Lochinvar / Household Appliance / Water Heater

Lochinvar SNA500-125 8Field wiring, Installation & Service Manual, Alarm Bell, Low Water Cutoff

Models: SNA400-125 SNR150-100 SNA285-125 SNR200-100 SNA500-125

1 72

Download 72 pages 52.95 Kb

Page 40

Image 40

Figure 8-3Low Voltage Field Wiring Connections

Installation & Service Manual

8Field wiring

Figure 8-3Low Voltage Field Wiring Connections

ALARM BELL

BUILDING MANAGMENT SYSTEM

LOW WATER CUTOFF

Page 40

Image 40

Lochinvar SNA500-125 8Field wiring, Installation & Service Manual, 3 Low Voltage Field Wiring Connections, Alarm Bell

Contents

Installation & Service Manual Models: SNR150-100, SNR200-100SNA285-125, SNA400-125,AND SNA500-125 SWH-I-SRev DContents When servicing the water heater – Please read before proceedingHazard definitions Water heater operation –The Shield - How it works Installation & Service ManualThe Shield - How it works... continued Models SNR150-100 -- SNA285-125Installation & Service Manual Front View - Models SNR150-100 -- SNA285-125Model SNA400-125 Model SNA500-125Installation & Service Manual The Shield - How it worksRatings Installation & Service ManualHIGH ALTITUDE Notes1Determine water heater location Installation & Service ManualInstallation must comply with Closet and alcove installations1Determine water heater location continued Installation & Service ManualInstallation & Service Manual 1Determine water heater locationFlooring and foundation Remove water heater from wood palletDo not install the Shield water heater into Installation & Service Manual1Determine water heater location continued Installation & Service Manual 1Determine water heater locationFigure 1-3_CombustionAir Direct from Outside Figure 1-4_CombustionAir Through Ducts1Determine water heater location continued TABLE - 1B MINIMUM RECOMMENDED COMBUSTION2General venting Direct venting optionsStandards for installation in 2General venting continuedVenting and combustion air MaterialModel Air IntakeVent Installation & Service ManualEquivalent NumberInstallation & Service Manual 2General venting continued3Sidewall direct venting Vent/air termination - sidewallKit Number Installation & Service Manual3Sidewall direct venting continued Installation & Service ManualVent/air termination – sidewall Figure 3-2 Clearance to Gravity Air InletsInstallation & Service Manual Figure 3-4A Sidewall Termination Assembly3Sidewall direct venting Prepare wall penetrations3Sidewall direct venting continued Vent/air termination – sidewallMultiple vent/air terminations VENTSidewall termination - optional concentric vent Installation & Service ManualSidewall termination installation Figure 3-7 Kit Contents_CVK3003 - SNR150-100Installation & Service Manual Figure 3-9 Concentric Vent Dimensional DrawingDimensional 3Sidewall direct venting continuedInstallation & Service Manual 3Sidewall direct ventingSidewall termination – optional concentric vent Figure 3-12 Concentric Vent Sidewall Attachment4Vertical direct venting Vent/air termination – verticalInstallation & Service Manual Determine locationInstallation & Service Manual 4Vertical direct ventingVent/air termination – vertical Prepare roof penetrations4Vertical direct venting continued Vertical termination - optional concentric ventInstallation & Service Manual Vertical termination installationInstallation & Service Manual Figure 4-6 Concentric Vent Roof Installation4Vertical direct venting Vertical termination – optional concentric vent5Conventional and sidewall venting Installation & Service ManualFigure 5-1 Vertical Direct Venting w/Room Air Figure 5-2 Sidewall Direct Venting w/Room Air6System piping System water piping methodsScalding General piping informationAPPROXIMATE TIME / TEMPERATURE 6System piping continuedRELATIONSHIPS IN SCALDS Installation & Service ManualInstallation & Service Manual 6System pipingFigure 6-2 Single Unit COLD WATER SUPPLY FLOW CHECK VALVE TYPICALInstallation & Service Manual 6System piping continuedFigure 6-3 Multiple Units COLD WATER SUPPLYFLOW CHECK VALVE TYPICALInstallation & Service Manual Figure 6-4 Two Temperature - Single UnitHIGH TEMPERATURE BUILDING RETURN LOW TEMPERATURE BUILDING RETURN7Gas connections Connecting gas supply pipingInstallation & Service Manual Natural gas Propane gasInstallation & Service Manual Figure 7-3 Inlet Pipe with Backup Wrench7Gas connections continued Check inlet gas supplyTable 7A Natural Gas Pipe Size Chart Natural Gas Pipe Capacity ChartGas valve replacement 7Gas connectionsGas pressure DETAIL8Field wiring Installation must comply withPower cord connection Auxiliary device proving switch8Field wiring Installation & Service ManualFigure 8-3 Low Voltage Field Wiring Connections ALARM BELL8Field wiring continued Installation & Service ManualINPUTS CONTROL BOARD9Condensate disposal Condensate drainInstallation & Service Manual 1/2” 12.7 mm PVC TEE ASSEMBLY FACTORY SUPPLIED10 Start-up Installation & Service ManualCheck for gas leaks Inspect/fill condensate systemInstallation & Service Manual Table 10A Flue Products Chart10 Start-up Start the water heaterInstallation & Service Manual 10 Start-up continuedInstallation & Service Manual 10 Start-up11 Operating information GeneralTemperature control Protection featuresInstallation & Service Manual Water heater temperature regulationAdjustable control parameters Operating temperature target11 Operating information continued Sequence of operationOPERATION DISPLAYShield control module Installation & Service Manual11 Operating information Figure 11-1 Control PanelStatus display screens Status Display ScreensScreen Display showsStatus Display Screens cont’d Installation & Service Manual11 Operating information Screen12 Maintenance Maintenance and annual startup Service technicianOwner maintenance see the following pages for instructions12 Maintenance Address reported problemsClean condensate trap Inspect water heater area12 Maintenance continued Flue vent system and air pipingCheck water system Check expansion tankCheck ignition ground wiring Check all water heater wiringCheck control settings Check flame signalCleaning heat exchanger Handling ceramic fiber materialsOiled bearing circulators 12 Maintenance continued13 Troubleshooting Before troubleshootingCheck control module fuses Check the following13 Troubleshooting continued FAULTCAUSE CORRECTIVE ACTIONChecking temperature sensors 13 TroubleshootingInstallation & Service Manual Temperature FFAULT CAUSECORRECTIVE ACTION Troubleshooting continuedDESCRIPTION 13 TroubleshootingFAULT Installation & Service Manual13 Troubleshooting continued FAULTInstallation & Service Manual reset once the13 Troubleshooting FAULTInstallation & Service Manual Manual Reset13 Troubleshooting continued FAULTInstallation & Service Manual Switch13 Troubleshooting FAULTInstallation & Service Manual reset once the condition13 Troubleshooting continued FAULTInstallation & Service Manual Service BlkCombustion Analysis Procedure POSSIBLE CAUSE13 Troubleshooting Installation & Service ManualGas valve adjustment procedure 13 Troubleshooting continuedInstallation & Service Manual Figure 13-3 GasValve Adjustment: Model SNA400-12514 Diagrams Installation & Service ManualFigure 14-1 Ladder Diagram are connected or a fault condition is presentInstallation & Service Manual Figure 14-2 Wiring DiagramLOW VOLTAGE 120 VACSWH-I-SRev D 3/09