Raypak 2600401 Controls, Inspection Procedures, Low NOx Heaters-Models, Burners

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Inspection Procedures

Burners

Clean main burners and air louvers of dust, lint and debris. Keep heater area clear and free from com- bustibles and flammable liquids. Do not obstruct the flow of combustion and ventilating air. Make visual check of burner and pilot flame. Yellow flame indicates clogging of air openings. Lifting or blowing flame indi- cates excess high gas pressure. Low flame indicates low gas pressure.

Fig. 26: Typical Main Burner Flame

Fig. 27: Pilot Burner Flame (IID units)

Controls

Check all controls to see that they are operational. To check electronic safety (IID Models) , turn off main burner. Observe pilot burner when shutting off pilot gas. Ignition spark should go on. Main gas valve will also drop out.

High Limit Switch - to check high limit switch, turn dial setting down to a point slightly below the temperature of the water leaving the heater. The reset button should snap out and the burner should shut off. Reset dial to 30°F to 40°F above desired operating tempera- ture, and push reset button. Burner should light.

Low NOx Heaters—Models 261–401

The Low NOx Heater is offered as a model W1-ON- OFF firing.

The heaters are certified and tested under the ANSI Z21.10.3 Standards for hot water heaters.

The heater should be installed to meet all local codes, the National Fuel Gas Code Z223.1 and with the National Electrical Code, ANSI/NFPA 70.

DETAIL A

SEE DETAIL VIEW A

Fig. 28: Pilot Burner Flame (STG Pilot Units)

Fig. 29: Burner Detail

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Contents Econopak Water Heaters Page Contents Are important but not related to personal injury hazards Temperature Time to Produce Serious Burn General SafetyTime/Temperature Relationships in Scalds General Specifications Receiving EquipmentTank Mounting Base InstallationCode Requirements ClearancesModels Venting ConnectionsOutdoor Models Model No Sq. in. of Each Free AreaIndoor Models Models 0260Vent Max Model No Connector Horizontal Diameter Length ft Vent Terminal/Indoor Stack InstallationCommon Vents Vent Pipe Draft Hood HeaterGas Supply Connections Model No Nat ProWater Connections & System Piping Gas Pressure Specifications Type Inches WC Regulator MinSetting Gas Pressure RegulatorRelief Valve 0261 Low NOx WH1 with Pressure Relief ValveElectrical Wiring Wiring Diagrams Standing Pilot ModelIntermittent Ignition Device IID Model Intermittent Ignition Device IID Models 0330 Intermittent Ignition Device IID Model 0261 Low NOx Intermittent Ignition Device IID Models 0331 & 0401 Low NOx Sequence of Operation Servicing ProceduresStart-up Procedures Honeywellpilot Robertshaw Pilot For Robertshaw Gas Valve Turn gas control System Shut Down ProcedureFor Automatic Ignition Models Testing the Ignition Safety Shut-off To Turn Off Gas To ApplianceLow NOx Heaters-Models Inspection ProceduresControls BurnersOperation Burner AdjustmentHigh/Low Gas Pressure Switch Visual InspectionRepair Section Combustion Chamber Removal Heat Exchanger Re-assemblyHeat Exchanger Removal Troubleshooting CausesPiping Electrical Electronic Ignition IID Intermittent Pilot System- Honeywell S8600Electrical Standing Pilot Adjustments & Replacement of Components Tube Replacement Procedure Circulator ReplacementControl Well Replacement Procedure for Cleaning Flue Gas Passage WaysLimitedpartswarrantyeconopakwaterheaters Page Page