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The IO HVAC CONTROLS TR-40-MT is a 40 VA multi-tap transformer designed for low-voltage control circuits in HVAC systems. It accepts primary voltage inputs of 120, 208, or 240 VAC, making it suitable for a range of residential and light commercial installations without requiring a dedicated single-voltage unit. The foot-mounted design allows for secure panel or enclosure mounting. HVAC technicians install this transformer to power 24-volt control circuits that operate thermostats, contactors, and other low-voltage components throughout a heating or cooling system.
This transformer is used in residential and light commercial HVAC applications where control-circuit power is required. Its multi-tap primary accommodates varying supply voltages commonly found across different job sites and electrical services. The foot-mount configuration is typical in installations where the transformer is secured inside a control enclosure, air handler cabinet, or furnace cabinet alongside other control components.
Designed as an OEM-style replacement or upgrade transformer for residential and light commercial HVAC control circuits requiring a 40 VA, multi-tap, foot-mounted unit.
Installation should be performed by a licensed HVAC technician or qualified electrician. Disconnect and lock out all power to the system before removing or wiring the transformer. Confirm the correct primary tap is selected to match the supply voltage before energizing. Follow applicable NEC requirements for low-voltage control wiring and enclosure work.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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