A.O. Smith 1500, 200, 201, 2500, 2100, 1850, 1300, 1000 Operation, General, Wiring Connections

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WIRING CONNECTIONS

ALL ELECTRICAL WORK MUST BE INSTALLED IN ACCORDANCE WITH THE MOST RECENT VERSION OF THE NATIONAL ELECTRICAL CODE/CANADIAN ELECTRICAL CODE AND MUST CONFORM TO LOCAL REGULATIONS.

AN ELECTRICAL GROUND IS REQUIRED TO REDUCE RISK OF ELECTRIC SHOCK OR POSSIBLE ELECTROCUTION. Make the ground connection to the wire provided in the electrical supply junction box on the boiler.

Grounding and all wiring connected to this boiler must conform to the local code authority having jurisdiction or, in the absence of such requirements, with the National Electrical Code, ANSI/NFPA 70 or CSA-C22.2 most recent edition.

The Central Control Board and Ignition Control Boards that make up the control system are micro-processor based which make them vulnerable to voltage and amperage fluctuations in the power supply. It is imperative that they be protected by a suitable

commercial-grade surge protection device.

IF ANY OF THE ORIGINAL WIRE, AS SUPPLIED WITH THE APPLIANCE, MUST BE REPLACED, IT MUST BE REPLACED WITH TYPE 105°C WIRE OR ITS EQUIVALENT.

The Genesis Hot Water Supply Boiler must be connected to a single phase line source that is:

120 volts, 60 Hertz, and 30 Amps.

The system controller, other than the factory-supplied tank probe (e. g. Honeywell Aquastat) must be wired on the low voltage side of the 24VAC rear junction box.

Refer to the Schematic Diagram (Figure 19) and the Connection Diagram (Figure 20) for wire connections.

Fuse Protection

The 24 VAC circuitry is protected with a 3 amp auto fuse on the ignition control boards and a 5 amp fuse on the Central Control Board. If the fuse opens, a red LED located near the fuse will light (see figures 14 and 15). If the red LED is illuminated, replace the fuse. Repeated failure of the fuse is an indication of possible damage to the ignition control. The 120V circuits of each ignition control module is protected with a 10 amp fuse located inside the control box.

Note: Four extra 3 amp fuses and one 5 amp fuse are supplied with the boiler.

Recommended Replacement fuses:

3 Amp: Littlefuse automotive fuse PN 257003

5 Amp: Bussman Automotive fuse PN ATC5

OPERATION

IMPORTANT

Only qualified personnel shall perform the initial firing of the heater. At this time the user should not hesitate to ask the start-up technician any questions regarding the operation and maintenance of the unit. If you still have questions, please contact the factory or your local A.O. Smith representative.

Lighting and Operating instructions are included with this manual. By using these instructions, the user may be able to make minor operational adjustments and save unnecessary service calls. However the user should not attempt repairs, but should contact a service technician or gas supplier.

GENERAL

Never operate the boiler without first making sure the boiler and system are filled with water, in addition:

For hot water supply installations:

Make sure a temperature and pressure relief valve is installed at the boiler and, if used, the storage tank. Also check for leaks.

For heating boiler installations:

Make sure that the boiler and system have been purged of air and checked for leaks.

Also be sure to check the gas piping for leaks before beginning the initial firing of the boiler.

FILLING AND PURGING FOR HEATING

BOILER INSTALLATION

1.Fast fill system through bypass until pressure approaches desired system pressure. Close bypass valve and permit pressure to be established by the pressure reducing valve.

2.Vent all high points in system to purge system of air.

Provisions should be made to permit manual venting of radiators or convectors.

FILLING FOR HOT WATER SUPPLY BOILER INSTALLATION

1.Close the systems drain valve by turning handle clockwise.

2.Open a nearby hot water faucet to permit the air in the system to escape.

3.Fully open the cold water inlet pipe valve allowing the heater and piping to be filled.

4.Close the hot water faucet as water starts to flow.

5.The heater is ready to be operated.

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Contents For buying this cost efficient, high recovery unit from Limited WarrantyGAS and Electrical Characteristics ROUGH-IN DimensionsRough in Dimensions Recovery Capacities Heat Exchanger Pressure DropGrounding Instructions High Altitude InstallationForeword Correct GASFEATURES/CONTROLS Circulating Pump Installation InstructionsSafety Relief Valves Required AbilityLevelling Installation ClearancesChemical Vapor Corrosion AIR RequirementsUnconfined Space Connecting Boiler to a Common VentVenting Confined SpaceIntake/Exhaust Installation Requirements See figure Location Requirements INTAKE/EXHAUSTEquivalent Standard Vent Vertical CategoryType B or 16 40.6 cmIII Stainless Standard Vent Horizontal CategoryVenting Vent Size Vent Length Material Inches Feet SteelDirect Vent Vertical Exhaust Configurations Direct Vent Vertical CategoryDirect Vent Horizontal Exhaust Configurations Direct Vent Horizontal CategoryStandard Vertical VENTING, Category Horizontal Vent InstallationVent Connector Model Number Standard Horizontal VENTING, CategorySystem Installation Hydronic InstallationCooling Piping Space Heating ApplicationsHOT Water Supply Boiler Installation Single boiler with horizontal tank Single boiler with vertical tank Suggested Pipe Size For Multiple Gas Appliances Propane Gas Distance from Meter BTU Input Single Unit INSTALLATION, Suggested Pipe SizeGAS Connections BtuhFilling for HOT Water Supply Boiler Installation Wiring ConnectionsFilling and Purging for Heating Boiler Installation OperationInlet GAS Pressure AdjustmentsPurging of GAS Line Manifold PressureFor Your Safety Read Before Operating For Your Safety Read Before Operating Control System DIA-SCAN II Display Board Operating ProceduresDescription of MULTI-STAGE Firing System Red Fault Lights Options/Features Setting ProceduresGreen Status Lights Outlet Probe Temperature ProbesYellow Parameter Set Lights Inlet ProbeApplication Hydronic Heating Procedure for Setting Tank Probe TemperatureProcedure for Setting Stage Differential Stage OneDisplay Stage Cycle Count Procedure for Setting Pump DelayLast Error Mode Appliance Operating SequencePreventative Maintenance Main BurnersDeliming Troubleshooting Ignition System Replacement PartsLED Insufficient AIR AIR Pressure Switch Stage No GAS Valve Power SensedCirculate Fault Flow Switch Power VentNEW Boiler Limited Warranty Replacement Parts