24 volt transformer radio shack8/26/2023 ![]() The pilot (7B) is lit temporarily, which lights up the burners. When the power successfully passes through all of the components (fuse, fusible link, high limits, pressure switch, thermistor) and again returns to the Ignition Controller (6), the gas valve (8) should open and allow gas to flow into the pilot, which is lit by a small spark (7A), created by the spark ignition wire. The Transformer (1) steps down the incoming power to 24 volts, and the power does a circuit, or a loop, from one side of the gas valve to the other. What we have here is a schematic diagram of the safety circuit in an electronic gas pool heater. If fact, if your Pool Thermostat (potentiometer) wears out, you can use the Spa thermostat to heat the pool. The Dual thermostats (shown above) is something of a gimmick, it just allows you to keep two preset temperatures, and use the 3-position Spa-Off-Pool switch to select Spa or Pool, it’s nothing more than that. The diagram below is from the Teledyne Laars Series One heater, Model EPS/EPC, and Laars Series 2 ESC. ELECTRONIC POOL HEATER TROUBLESHOOTING GUIDESįor our example heater, we will be using the Old Teledyne Laars Series I & Series II Spark Ignition heaters, made from 1986-1997 but the concepts apply to electronic heaters made by Raypak, Hayward or Purex – RP2100, H-Series or Minimax Plus heaters. You don’t need a fancy test meter to troubleshoot a pool heater. You can find these everywhere – Walmart, Home Depot, Radio Shack, and it should cost under $20. You’ll need a multi-meter, one that can check low voltage 24 Volts. ![]() The pilot light ignites the first burner (on the far right), and the others follow – whoosh!Īfter a heater ignites, it continues to fire or burn until the set thermostat temperature is reached, or another switch breaks the circuit (pressure switch, high limit switch, on/off switch). Once the safety circuitry checks out, the gas valve opens and releases gas to the burners. Electronic heaters are wired up with 110V or 220V power directly into a transformer, which steps down the power to 24V. From the transformer, 24 volts powers the entire ignition and safety circuitry, and everything is controlled electronically with the Ignition Control (PCB, printed circuit board), the brains of the operation.īut, aside from the IID controller, transformer, a redesigned electronic thermostat, gas valve and pilot, electronic heaters still function in the same way as millivolt heaters. Gone is the pilot generator and mechanical thermostat. This new generation of gas pool heaters is a whole new ball game. When your turn on a gas burner on a stove, you don’t have a pilot burning, you have a sparker (tick-tick-tick) that lights one side of the burner, and then the burner orifices quickly ignites, all around the burner. Second in our Series of Gas Pool Heater Troubleshooting Guides, today we tackle the early electronic pool heaters from the mid-eighties to the late nineties.Ī Spark Ignition is akin to an electronic gas stove top.
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