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The RCD ht01te240 is a control transformer designed for HVAC systems, stepping down a 240-volt primary supply to a 24-volt secondary output. This low-voltage transformer powers control circuits in heating and cooling equipment, including thermostats, control boards, and relay coils. At 1 inch x 1 inch x 1 inch, it is a compact unit suited for installation inside equipment enclosures where space is limited. Licensed HVAC technicians install this part as a direct OEM-style replacement when a failed transformer causes no-call or intermittent control circuit faults.
This transformer is applied in residential and light commercial HVAC systems that operate on a 240-volt supply and require a 24-volt control circuit. Typical installation scenarios include gas furnaces, air handlers, and split-system condensing units where the factory transformer has failed or been damaged by a short circuit in the low-voltage wiring. It fits within the standard wiring cabinet or blower compartment of equipment designed around a 240V-to-24V step-down control circuit.
Designed as an OEM-style replacement control transformer for Carrier HVAC equipment requiring a 240-volt primary and 24-volt secondary control circuit.
Installation should be performed by a licensed HVAC technician. Disconnect and lock out all power to the unit before removing or installing the transformer. Inspect low-voltage wiring for shorts before energizing the new transformer, as an unresolved short will damage the replacement unit. Follow applicable NEC requirements for low-voltage control wiring connections and equipment grounding.
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