Lochinvar 500, 90 service manual Safety Shutoff Test For Standing Pilot Ignition System

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Installation & Service Manual

6Start-up

10.Use the loop end of the wire lighting wand, shipped with the instruction package, to hold the match and reach the pilot. An access slot is provided in the lower front jacket panel, beside the burner, to insert the lighting wand and match to the pilot. Lift the pilot cover (FIG. 6-3) to access the pilot. Push down and hold in the red button on the gas valve. This should start gas flow to the pilot. Continue to hold the red button in for about one (1) minute after the pilot is lit. Release the button and it will pop back up. The pilot should remain lit. If the pilot goes out, repeat steps 5 through 10.

If the red button does not pop up when released, stop and immediately call your gas supplier.

If the pilot will not stay lit after several tries, turn the gas control to “OFF” and call your service technician or gas supplier.

11.Turn the gas control knob on the gas valve counterclockwise to the “ON” position.

12.Turn on all electric power to the appliance.

13.Re-install the lower panel door.

14.Set the thermostat to the desired setting.

15.Re-install the control panel door.

TO TURN OFF GAS TO APPLIANCE

1.Set the thermostat to the OFF position.

2.Turn off all electric power to the appliance if service is to be performed.

3.Turn the gas control knob on the gas valve clockwise to the “OFF” position. Do not force.

￿WARNING Should overheating occur or the gas fail to shut off, turn off the external manual

gas valve to the appliance.

Safety Shutoff Test For Standing Pilot Ignition System

PILOT WITH THERMOCOUPLE

PILOT WITH SPARK IGNITION

Figure 6-4_Pilot with Thermocouple and Spark Ignition

1.With the main burners on and firing, unscrew the thermocouple connection from the gas valve (FIG. 6-4) and remove from the fitting.

2.The main gas valve should extinguish the burners immediately after removal of the thermocouple.

3.If burners do not extinguish, immediately follow steps in “To Turn Off Gas To Appliance”.

4.Immediately call a qualified serviceman or installer to repair an ignition system that fails to operate properly and shut down the burners.

5.After successful completion of test, turn the control knob on the gas valve clockwise to the “OFF” position. Do not force.

6.Carefully reconnect the thermocouple to the gas valve.

7.Follow the Lighting Instructions to relight the pilot and establish normal operation.

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Contents Models 90,000 500,000 Btu/hr Contents Please read before proceeding Checking equipmentCodes Ratings Copper-fin =B=R RatingCopper-fin Specifications Copper-fin How it works Gas connection pipeModels CWN270 Front View Model CWN399 Front View 422 Determine unit location Location of unitDetermine boiler location 3Combustion Air Direct from Outside6Combustion Air from Outside Single Opening Minimum Recommended Combustion AIR Supply to Equipment Room Venting Conventional Negative Draft Venting SystemVent Pipe Sizes Venting Vertical Vent Termination Clearances Less from Ridge From Parapet WallSidewall Venting Masonry Chimney InstallationVent Materials NumberAutomatic Vent Damper 7CB with Vent Damper and Vent Damper Terminal BlockGas Connection Gas connectionsGas Supply Gas Pressure Test Manifold PressureInstall Piping to Control Gas PipingGas Manifold Pressure Adjustment Procedure Clockwise to raise regulator gas pressure, counterclockwiseChecking Gas Supply Pressure 4Gas Supply PressureCombination Gas Valves Venting of Combination Gas ValvesTwo Stage Burner Control System Water Flow Switch if equipped Hydronic pipingRelief Valve Minimum Required Flow For Heating Boiler Typical Heating Boiler InstallationsLow Water Cutoff if equipped General Plumbing RulesSystem Temperature Rise Chart Piping of the Boiler SystemWater Connections Heating Boilers Only Heat Exchanger Pressure Drop ChartCirculator Pump Specifications Circulator Pump RequirementsPrimary/Secondary Boiler Piping Three Way Valves Boiler Flow RatesPrimary / Secondary Piping 4Primary / Secondary Piping of a Single BoilerNot to Exceed 4 Pipe DIA or MAX. of 12 Apart 8Multiple Boilers Zoned with Circulators Power Venter Connection to Terminal Strip Terminal Strip WiringBoiler Operating Temperature Control Electrical connectionsTemperature Adjustment Pump Wiring for a Heating BoilerOperating Temperature Control Maximum SET Point Determination Locating Temperature ControlTemperature Control Settings Maximum Set Point DeterminationMulti-Purpose Temperature Sensor Temperature Control SensorsInlet Water Temperature Sensor Outdoor Air Temperature SensorOutdoor Air Reset Option Installation of a Remote Sensor Boiler ApplicationInstallation of a Tank Sensor Water Heater Application Additional Temperature Controls Blocked Vent and Flame Roll-Out / Flame Interlock Switch Manual Reset High Water Temperature Limit ControlPre-start Checklist Start-upInitial Start-up Lighting Instructions 1Gas Valve 90,000 270,000 Btu/hr ModelsSafety Shutoff Test For Standing Pilot Ignition System To Turn OFF GAS to ApplianceOperating Instructions Freeze Protection Safety Shutoff Test for Spark Ignition Pilot SystemIntermittent Pilot Spark Ignition System F9/M9 To Turn Off Gas to ApplianceWater Treatment Freeze Protection for a Heating Boiler System if requiredDomestic water heaters Required Temperature RiseRequired Temperature Rise Domestic Water Heaters 90,000 500,000 Btu/hr ModelsWater Chemistry Softened Water SystemsPump Operation 1Single water heatersingle tank 2Single water heatermultiple tank 3Multiple water heatersingle tank Minimum Pump Performance Remote Sensor InstallationThermostat Settings Heat Exchanger5Danger Warning Thermal Expansion Water Flow Switch if equippedPressure Only Relief Valve Cathodic ProtectionOwner maintenance Maintenance and annual startupService technician See the User’s Information Manual for instructionsMaintenance Check Expansion Tank Check Relief ValveCombustion Air Adjustment Check All WiringCheck Control Settings Perform Start-up and ChecksInspect and Clean Burner Heat Exchanger / Burner AccessInspection and Cleaning Procedure Inspection of Heat Exchanger Waterways Pilot Flame Adjustment ProcedureClear Area Water Circulating PumpReview with owner Gas Train and ControlsTroubleshooting Pilot or replace Wiring Diagram F1 Unit DiagramsSchematic Diagram F1 Unit 90,000 270,000 Btu/hr ModelsSchematic Diagram F9 Unit Wiring Diagram F9 Unit315,000 399,999 Btu/hr Models Diagrams Diagrams Page Revision a ECO #C06290 initial release CFA-I-S Rev a 09/10
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