Pool & Spa Heaters

All ModelsPRESSURE SWITCH ADJUSTMENT1. With pump and heater on, turn adjustmentknob (clockwise) until a click is heardfrom the gas valve.2. Turn adjustment knob (counter clockwise)1/4 turn.3. Turn pump off and on several times.Heater should shut off immediately. If it doesnot,repeat steps above until properadjustments is made.AdjustmentKnobpress.tifPRESSURE SWITCH ADJUSTMENT RANGEFLAME ROLL-OUT SAFETY SWITCHrollout.tifThe heater is equipped with a thermal cutoff device toprevent flame roll-out in the event that the heatexchanger becomes blocked. This is a "Single-use"type fusible link or thermal fuse, that must be replacedwhen disabled by an over temperature condition,caused by excessive restriction in the heatexchanger flue passage.HIGH LIMITSAutomaticGas Shut-off HighLimit ThermostatAutomaticResetThermostat1.5 m Max1.5 m Maxrange.tifags.tifManual ResetHigh LimitThermostatautoreset.tiflm7.tifNOTE: If heater is installed outside of the limitsshown, a flow switch must be used in place of thepressure switch when mounted and wired adjacent tothe heater.TWO SPEED PUMPSIn some cases, the flow on the low speed is insufficientto operate the heater. This is apparent when thepressure switch cannot be further adjusted or if theheater makes banging noises. In these cases, thepump must be run at high speed when heating thewater.CAUTION: Do not operate the heater without thefunctionof a properly adjusted pressure switch or flowswitch.The heater is equipped with one manual reset overheatthermostat located in the return header, set toopen at approx. 100°C. the other is the AutomaticGas Shut-off limit, set to open at 57°C and located inthe Inlet/Outlet header.NOTE: An erratic high limit is often characteristic ofinternal heat exchanger problem, i.e. scale buildup,defective bypass. Refer to troubleshooting sections.055, 105 155 ModelsHIGHMOSTATLIMITREMOVAL& MANUAL RESET HIGH LIMIT THER-Disconnect top portion of unit. (See heat exchangerremoval procedure steps 1 thru 7 and step 10).1. Remove Jacket Top,Flue Collector and Baffle.2. Remove defective high limit and replace withnew high limit.2617-08-00