Jandy Lite2 Installation And Operation Manual
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Contents
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Page 30FLUE COLLECTORHEAT EXCHANGERCOMBUSTION CHAMBERBURNERBURNER TRAY SHELFVENT TOPEXHAUSTAIRFLOWFigure 22. Atmospheric Combustion Systemthe pool/spa water must be monitored with anaccurate pool thermometer. The control has adual interface to allow switching betweenseparate pool and spa settings or operational andstandby settings.3. Hot Surface Ignition - The LD heater relies ona hot surface igniter to ignite the burners whenthe water temperature going through the heaterfalls below the controller's set point. When theheater's controller calls for heat, a signal is sentto the electronic ignition control, which energizesthe hot surface igniter.4. Transformer - The transformer is supplied withthe available line voltage, either 115 VAC or 230VAC. The transformer then converts the voltageto 24 VAC which is placed across the tempera-ture controller and safety circuit of the heater. Ifthis current is broken at any time, the gas valve isimmediately shut off and the heater stops firing.5. Limit Switches - Two limit switches preventexcessive water temperature - one within theheat exchanger and one for water leaving theheater. If either senses excessive temperature,burner operation is interrupted.6. Water Pressure Switch - This control senseswhether or not water is available to the heater bymeasuring back pressure inside of the heatexchanger. If the pool water pump fails or thewater filter is blocked, the pressure switchprevents operation of the burner.7. Fusible Link - This is a single-use switch whichdetects abnormal temperature in the componentvestibule. It is a fusible link which is held to theinner panel just above the burner tray by a sheetmetal bracket. Excessive temperature in thecomponent compartment, possibly due to ablocked flue or flame roll-out, will cause the linkto fail. This opens the safety circuit which shutsoff the gas valve and shuts the heater down.8. Ignition Control - The ignition control receivesa signal from the heater's temperature controllerwhen there is a call for heat. It then checks thesafety circuit and coordinates the timing for theenergizing of the hot surface igniter and theopening of the gas valve.10.4 Electrical TroubleshootingThis section describes procedures for checkingthe electrical power and control components of theheater one at a time and in the order they appear in thecontrol circuit. It is important to follow the sequence ofthis trouble shooting guide because the safety circuit isconnected in series. |
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