Lochinvar GAS HEATER FOR COMMERICAL POOL APPLICATIONS service manual Programming Mode

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Installation and Service Manual

pool return sensor has been installed and connected, this will be the temperature of the water coming from the pool.

By pressing the Select key, the Pool Target is shown and the text TARGET on the display. This is the pool temperature set point.

By pressing the Select key again, the Boiler Inlet Temperature is shown, indicated by the text Boil In. This is the temperature of the water going into the pool heater. Note that it is different than the temperature of the water coming from the pool.

By pressing the Select key again, the Boiler Outlet Temperature is shown, indicated by the text Boil Out. This is the temperature of the water coming out of the pool heater, before it is mixed with the water from the pool.

By pressing the Select key again, the Boiler Rise is shown, indicated by the text Boil ΔT. This is the difference between the inlet and outlet temperatures at the pool heater.

If the pool supply sensor has been installed and connected, by pressing the Select key, the Pool Supply Temperature is shown, indicated by the text SUP. This will show the actual temperature of the water returning to the pool.

If in the Advance mode (rear dip switch set to “0” position), the Boiler On hours will be displayed, indicated by the text BOIL ON in the display. This is the total number of hours the pool heater has been heating the pool. To clear the Boiler On hours press the Up and Down Arrow keys simultaneously. For a detailed explanation of the advance settings, see Appendix B on page 59 of this manual.

By pressing the Select key again, the display returns to the Pool Temperature display.

Programming Mode

In order to adjust any of the settings, it is necessary to enter the Adjust mode. This is done by pressing all three buttons simultaneously for one second and it will change from View to Adjust. The setting shown can be adjusted (within it’s acceptable range) by pressing the Up or Down Arrow key.

The default display shows the Pool Target temperature indicated by the arrow pointing to the text POOL on the overlay, and the text TARGET on the display. This is the temperature of the water from the pool at which the pool heater will turn off. The default is 85°F/27°C.

By pressing the Select key again, the Pool Differential temperature is shown, indicated by the arrow pointing to the text POOL on the overlay, and the text DIFF on the display. This is the number of degrees below the Pool Target temperature that the pool temperature must drop before the pool heater will turn on. The default is 4°F/2°C.

By pressing the Select key again, the Temperature Units will be displayed, indicated by the text °F or °C. This is the units in which the temperatures are shown. The default is °F.

By pressing the Select key again, the Pool Target will be shown once more. To return to the View mode, simply stop pressing any buttons for 25 seconds.

Note: The control values programmed into memory will not be lost because of a power failure.

Error Messages Displayed by the Temperature Controller

There are six error messages that can be displayed in response to software or hardware problems with the pool heater's internal temperature control. The error codes that may be seen on the display are:

E01 - The internal memory of the microprocessor in the temperature control has a read error at power up. This error cannot be field repaired. Replace the pool heater's temperature control if the error persists.

SHr - There is a short in the temperature sensor. Make sure sensors are properly installed, wired and connected to the control. Correct sensor installation or replace sensor.

OPn - There is a break in the wiring to the temperature sensor. Make sure sensors are properly installed, wired and connected to the control. Correct sensor installation or replace sensor.

FP - The burner is not running 2 minutes after the start of the call for heat. Check ignition control codes.

E02 - The outlet temperature from the pool heater reached its maximum setting. Check the bypass pump and mixing valve.

E03 - The inlet temperature into the pool heater was below its target temperature for more than 15 minutes. Check the mixing valve.

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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 FansVertical Vent Termination Clearances and Location General InformationVenting Support Table B Sidewall Vent Termination Clearances and LocationSidewall Air Inlet Combustion Air Inlet PipingLength of Air Inlet Pipe Combined Air Inlet Points Vertical Rooftop Air InletNegative Draft Vent System OptionsConventional Negative Draft Venting Common Venting Systems Masonry Chimney InstallationsFlue Outlet Piping Inspection of a Masonry Chimney Vertical DirectAire VentingVenting of Flue Products Vent KitsSidewall Venting Sidewall Venting Without Fan Sidewall FanSidewall Venting Termination Masonry Chimney Installation TABLE-E Horizontal DirectAire VentingDirect Venting Combustion Air Inlet Piping Horizontal DV Venting TerminationFlue Pipe Materials Sealing Type-B Doublewall Vent Pipe or Galvanized Vent Pipe Length of Air Inlet PipeAir Inlet Piping Materials Vertical Rooftop Air Inlet Combined Combustion Air Inlet PointsOutdoor Vent/Air Inlet Location Outdoor Installation Venting3-Way Valve Cover Installation Combustion Air Fan Adjustment for startupGas Pressure Test Outdoor Vent Cap KitGas Train and Controls Connecting Gas Piping to the Pool HeaterGas Piping Venting of Combination Gas Valves Combination Gas ValvesChecking Gas Supply Pressure TABLE-JTable 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 Automatic Chlorinator and Chemical Feeders Water Flow SwitchRelief Valve Way Automatic Bypass Valve Wiring Pump Purge Delay OptionService Indicator Option TABLE-M Terminal Strip Connection OptionsLighting Instructions OperationStarting the Filter System Pre-Start ChecklistTo Turn Off Gas To Pool Heater Operation Error Messages Displayed by the Temperature Controller Programming ModeHot Surface Igniter and Ignition Control Module Diagnostic Status IndicationHot Surface Ignition Control Module Ignition Module Lockout FunctionsIgnition and Control Timings Access to Internal Control PanelTABLE-N TABLE-O Water ChemistryTest Recommended Level TABLE-PCirculating Pump Pipe Size RequirementsMinimum Pump Performance Heat ExchangerFlue Gas Passageways Cleaning Procedures High Water Temperature Limit ControlAppliance Area Water Circulating PumpHeat Exchanger Cleaning Burner Removal and CleaningElectrical Combustion and Ventilation AirFan Cleaning Adjusting Differential Air PressureCombustion Air Fan Adjustment Set-Up ProcedureIgnition System Checkout Adjustment ProcedureServicing Hot Surface Igniter and Ignition Module 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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