Allanson 421-BT387
The Allanson 421-BT387 Ignition Transformer is a ferromagnetic service replacement transformer designed to provide high-voltage ignition power for compatible oil burner systems used in commercial, industrial, and heating equipment applications.
Manufactured by Allanson International, the 421-BT387 belongs to the company’s service replacement transformer product family. It is designed to support reliable ignition performance in burner installations requiring a properly matched high-voltage transformer.
The Allanson 421-BT387 operates with a primary supply voltage of 120 VAC at 60 Hz and provides a nominal secondary output of 10,000 volts. Its rated secondary current is 23 mA, making it suitable for compatible burner ignition systems that require these electrical characteristics.
The transformer uses a ferromagnetic construction with a double-pole configuration. This design provides the high-voltage electrical output required to establish an ignition spark across appropriately installed burner electrodes.
A properly functioning ignition transformer is an essential component in compatible oil burner equipment. During an ignition sequence, the transformer supplies high voltage to the ignition electrodes, helping establish the spark needed to ignite the fuel-air mixture.
The 421-BT387 incorporates a mid-point grounded secondary configuration. This electrical arrangement must be considered when selecting a replacement transformer, as grounding configuration and high-voltage connections are important factors in burner compatibility.
The unit features thumb-screw high-voltage terminals and an internal junction box arrangement. These design characteristics help distinguish the 421-BT387 from other service replacement transformers that may use different terminal types, grounding arrangements, or mounting configurations.
Allanson designs its ferromagnetic service transformers with high-temperature wire and construction features intended to support continuous-duty operation in compatible heating equipment.
The manufacturer’s service replacement transformer family emphasizes reduced operating noise and electromagnetic interference. Appropriate electromagnetic interference and radio-frequency interference control can help minimize unwanted electrical disturbances associated with high-voltage ignition equipment.
The Allanson 421-BT387 is intended for use in multiple compatible burner applications. However, this does not mean the transformer can be installed in every burner system without verification.
When replacing an existing ignition transformer, maintenance personnel should confirm the primary input voltage, secondary voltage, current rating, grounding configuration, terminal arrangement, mounting dimensions, and applicable burner manufacturer specifications.
The transformer must also be compatible with the burner ignition electrodes and the electrical control arrangement used by the equipment. An incorrect transformer selection may lead to ignition problems, equipment malfunction, or unsafe operating conditions.
Typical applications include compatible commercial oil burners, industrial heating equipment, oil-fired boilers, and burner service replacement installations requiring a 120 VAC primary and 10,000 VAC secondary ignition transformer.
The 421-BT387 can be considered for industrial maintenance inventories and equipment replacement projects where the original component specifications match its electrical and mechanical characteristics.
For existing equipment, technicians should verify any proposed part-number substitution against the original burner manufacturer documentation and the current Allanson replacement cross-reference information.
Installation should be performed by qualified personnel familiar with high-voltage burner ignition systems. Electrical power must be isolated before servicing the equipment, and applicable burner safety procedures must be followed.
JJC Global Group LLC supplies industrial electrical components, ignition transformers, combustion control equipment, and replacement parts for commercial and industrial maintenance applications.
Customers can request a quotation for the Allanson 421-BT387 Ignition Transformer through JJC Global Group LLC for compatible burner systems, equipment maintenance, and replacement requirements.
Contact JJC Global Group LLC for product information, specifications, and quotations for the Allanson 421-BT387 or other industrial combustion system components.
For detailed electrical specifications, installation information, and product compatibility requirements, refer to the official Allanson 421-BT387 Ignition Transformer documentation.