Jandy Lite2 Installation And Operation Manual
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Contents
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Model LD Pool and Spa Heater Page 29SECTION 10.Professional Maintenance, Serviceand Diagnostic TroubleshootingWARNINGSERVICING SAFETYSome of the servicing procedures for the Lite2 modelLD pool heater are hazardous because they involvefuel gas, high voltage electricity, moving parts andprocedures which require testing or temporarybypass of safety controls. For this reason, the heatermust be serviced only by a qualified professionalservice technician.IMPROPER SERVICE HAZARDThe Lite2 model LD pool heater incorporates uniquedesign features. Incorrect service of this heater canresult in personal injury or damage to property. Toavoid such hazards, the heater must be serviced onlyby a qualified professional service technician.AVERTISSEMENTPRÉCAUTIONS LORS DES RÉPARATIONS ET DEL’ENTRETIENCertaines procédures d’entretien et de réparation desappareils de chauffage à LD présentent des dangers,car elles mettent en jeu des gaz combustibles,l’électricité à haute tension, des pièces mobiles etdes procédures qui nécessitent des mises à l’essaiou la dérivation temporaire des commandes desécurité. Pour cette raison, l’appareil de chauffagedoit être entretenu et réparé uniquement par untechnicien professionnel qualifié.DANGERS D’UN ENTRETIEN INADÉQUATLes appareils de chauffage à LD comportent descaractéristiques techniques uniques. Une réparationou un entretien inadéquat peut entraîner desblessures corporelles ou des dommages à lapropriété. Pour cette raison, l’appareil de chauffagedoit être entretenu et réparé uniquement par untechnicien professionnel qualifié.10.1 General InformationA qualified professional technician must servicethe Lite2 model LD pool heater using Jandy PoolProducts, Inc.'s service procedures. Before calling forservice, however, the owner should check for obviousproblems. The other components in the pool system,including pump, filters and strainers, water valves, gassupply and time clocks have an effect on heateroperation.Confirm that the LD heater control switch is setto either "POOL" or "SPA" and that the temperaturecontrol knob is set high enough to make the heateroperate. Make sure the pump is operating, that thefilter and strainers are not clogged, that there are nomis-positioned water valves, that the gas is not shut offand that time clocks are properly adjusted. Also besure that there is no blockage of the vent or louverswhich supply combustion air to the burners.10.2 Natural-Draft Combustion SystemThe Lite2 model LD pool heater has an atmo-spheric combustion system. This system is illustrated inFigure 22.As the heated exhaust gases rise out of thecombustion chamber, flow is created through thesystem and fresh combustion air is drawn into theheater through the louvers cut into the front and sidesof the heater. Gas is forced through an orifice into theopen end of a burner. When the gas flows into theburner, a “negative” pressure is created at the openingof the burner. This negative pressure pulls air into theburner with the gas and mixes the two together. Asthe gas/air mixture flows through the burner ports it isignited in the combustion chamber. Hot combustionproducts then rise through a highly efficient heatexchanger. Combustion products then enter a fluecollector and are directed to the outdoors through thegrate top of the heater or a vent pipe and cap.10.3 Heater Components and TheirOperation1. Gas Valve / Regulator - The gas valve controlsgas flow into the manifold. It provides flow onlywhen the temperature controls require heat andonly if all safety controls enable operation. It isalso a positive pressure regulator. It regulatesthe gas pressure in the manifold to specificationsaddressed earlier in this manual. This is neces-sary for proper operation of the burner system.2. LD Temperature Control- The Jandy LDcontroller is an electronic control which senseswater temperature by means of a thermistor andcontrols heater operation to bring the water to thedesired temperature. The desired temperature isset by rotating a knob on the face of the controlpanel. To achieve accurate water temperatures, |
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