or improper control signal calibration

Delivers consistent 70W heat output to ensure startup reliability in cold ambient conditions

Precision 24V Control: The 24-volt coil ensures reliable engagement even during slight voltage fluctuations in the control transformer

Whether you are performing a TXV orifice replacement or a new system HVAC expansion valve sizing

while the DPST configuration provides the necessary isolation for complex electrical sequences

Allanson Transformers 421-BT290 Transformer Els PW 17895 or improper control signal calibrationThe Allanson 421 BT290 is a heavy duty universal ignition transformer engineered for high performance oil burner service and replacement applications. Operating on a 120Vac supply voltage, this unit delivers a consistent 10,000Vac secondary voltage at 23mA, ensuring reliable arc initiation even in demanding environments. Designed with a mid point ground and a durable internal junction box, it simplifies field wiring while maintaining electrical