Lochinvar GAS HEATER FOR COMMERICAL POOL APPLICATIONS Access to Internal Control Panel, Table-N

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Installation and Service Manual

TABLE-N

Ignition Control Diagnostic Codes

Code Sequence

Condition

Constant ON System OK, no faults present.

Constant OFF Possible control fault, check power; LED may be effective, do not replace control if all operational sequences function properly, see TroubleShooting Guide.

One Flash Low Air, check air pressure switch and hoses to pressure sensing points, fan, venting and sealing of pressurized chamber.

NOTE: Brief flashing normal on fan start-up/proving.

Two Flashes Flame without call for heat, check for a gas valve stuck in the open position, air, venting, burners and the combustion process. Fan will remain on.

Three Flashes Lockout due to flame failure, push reset button on outer control panel after correcting ignition problem. Initial heater start up without properly bleeding air from the gas line may require multiple reset functions to achieve proper ignition.

Four Flashes Igniter failure, igniter will not maintain minimum 2.75 amp current draw, caused by low voltage, bad wiring/continuity, high resistance or igniter failure.

Five Flashes Power supply problem, check for low supply voltage or transformer output less than 18VAC.

Six Flashes Replace ignition module, internal fault.

24 VAC control circuit, circuit breaker for the control circuit, switching relays for component operation and wiring harness connections to the pool heater’s components. The control panels are common and may be switched between pool heaters for trouble shooting.

Removing the Control Panel

1.Pull the control panel out as far as it will go.

2.Remove the multi-pin connector blocks from the top and right side of the control panel.

3.Use a 1/2" box wrench or socket wrench to remove the bolt on the right side of the control panel.

4.Remove the entire control panel.

5.Reinstall the control panel in the reverse order.

￿CAUTION: Control panel is heavy and awkward to handle when removed. Carefully support the control panel when removing.

Ignition and Control Timings

Proven Pilot Hot Surface Ignition System F-9 on 500,000 through 2,070,000 Btu/hr models with One Hot Surface Ignition Module.

Hot Surface Ignition Module Timings (Nominal)

Prepurge: 15 Seconds

Hot Surface Igniter Heat-up Time: 25 - 35 seconds

Main Burner Flame Establishing Period: 4 Seconds

Failure Response Time: 0.8 Seconds at less than 0.5 μA

flame current

 

Flame Current:

5 - 15 μA

Post-purge:

30 Seconds

Optional Pump Delay Timing: 30 Seconds after burner shutdown

Access to Internal Control Panel

The control panel is accessed by turning the knurled knob located at the bottom center of the exterior control panel. Pull the panel out at the bottom. The door will tilt into unit until it comes free from the outer top. The outer control panel has an overlay attached to the exterior surface which indicates the function of each of the pool heater’s indicating lights and a clear window to view the digital temperature display from the temperature control. The thermostat and diagnostic light board are mounted to the back of the control panel door.

The control panel assembly is mounted on a slide out chassis to allow easy access to the components on the panel. The control panel contains the ignition module, transformer for the

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Contents GAS Heaters for Commercial Pool Applications Commercial Pool Heaters Unpacking General Product InformationCommercial Pool Heaters Product Identification Base for Combustible Floors Clearances from Combustible ConstructionCombustion Air Filter Freeze ProtectionCombustion Air Options InstallationCombustion Air from Interior Space Exhaust FansVenting Support General InformationVertical Vent Termination Clearances and Location Table B Sidewall Vent Termination Clearances and LocationLength of Air Inlet Pipe Combustion Air Inlet PipingSidewall Air Inlet Combined Air Inlet Points Vertical Rooftop Air InletConventional Negative Draft Venting Vent System OptionsNegative Draft Flue Outlet Piping Masonry Chimney InstallationsCommon Venting Systems Inspection of a Masonry Chimney Vertical DirectAire VentingSidewall Venting Vent KitsVenting of Flue Products Sidewall Venting Termination Sidewall FanSidewall Venting Without Fan Masonry Chimney Installation TABLE-E Horizontal DirectAire VentingDirect Venting Flue Pipe Materials Horizontal DV Venting TerminationCombustion Air Inlet Piping Air Inlet Piping Materials Length of Air Inlet PipeSealing Type-B Doublewall Vent Pipe or Galvanized Vent Pipe Vertical Rooftop Air Inlet Combined Combustion Air Inlet PointsOutdoor Vent/Air Inlet Location Outdoor Installation VentingOutdoor Vent Cap Kit Combustion Air Fan Adjustment for startup3-Way Valve Cover Installation Gas Pressure TestGas Piping Connecting Gas Piping to the Pool HeaterGas Train and Controls TABLE-J Combination Gas ValvesVenting of Combination Gas Valves Checking Gas Supply PressureTable K Multiple Unit Installations Gas Supply Pipe SizingMeasuring Net Manifold Gas Pressure Gas Manifold Pressure AdjustmentPumped Automatic Bypass Auxiliary Mixed Water Limit ControlWay Valve Cover Heater is Within 15 Feet of Pool Piping Heaters are within 15 feet Perpendicular of Pool Piping Relief Valve Water Flow SwitchAutomatic Chlorinator and Chemical Feeders Service Indicator Option Pump Purge Delay OptionWay Automatic Bypass Valve Wiring TABLE-M Terminal Strip Connection OptionsLighting Instructions OperationTo Turn Off Gas To Pool Heater Pre-Start ChecklistStarting the Filter System Operation Error Messages Displayed by the Temperature Controller Programming ModeIgnition Module Lockout Functions Diagnostic Status IndicationHot Surface Igniter and Ignition Control Module Hot Surface Ignition Control ModuleTABLE-N Access to Internal Control PanelIgnition and Control Timings TABLE-O Water ChemistryTest Recommended Level TABLE-PHeat Exchanger Pipe Size RequirementsCirculating Pump Minimum Pump PerformanceWater Circulating Pump High Water Temperature Limit ControlFlue Gas Passageways Cleaning Procedures Appliance AreaCombustion and Ventilation Air Burner Removal and CleaningHeat Exchanger Cleaning ElectricalSet-Up Procedure Adjusting Differential Air PressureFan Cleaning Combustion Air Fan AdjustmentServicing Hot Surface Igniter and Ignition Module Adjustment ProcedureIgnition System Checkout Sequence of Operation Glossary Prepurge Wiring BOX Connections Wiring BOX Connections Ladder Diagram Control BOX Connections Commercial Pool Heaters Appendix a View Menu Item Menu Description Appendix B
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