IO Hvac Controls UT-SWM Universal Thermostat

The iO HVAC Controls UT-SWM is a professional-grade universal thermostat smart wire module engineered to resolve complex wiring challenges in the field. Functioning as a 2 to 5 wire adapter, this system allows technicians to transmit up to five individual 24VAC digital outputs over a single pair of conductors between the thermostat and the indoor air handler. Utilizing dual microprocessor technology, the sender module encodes thermostat signals with checksum data, which the relay receiver module then decodes to trigger five 1-amp, voltage-free field relays. This makes it an ideal HVAC wire extender for retrofitting modern communicating thermostats or Wi-Fi-enabled controls into older structures without the need for intensive wall demolition or invasive cable pulls. The UT-SWM directly replaces the legacy W1-100 and provides full support for both heat pump and conventional multi-stage gas/electric systems. Built with a compact sender designed for in-wall placement, it ensures temperature accuracy by isolating heat-generating electronics from the thermostat sensor.

Key Benefits

• Eliminates Wire Pulling: Enables full control of 5 outputs over only 2 wires, significantly reducing labor time on retrofit jobs.
• Broad Compatibility: Works with mechanical relay-based thermostats from nearly all major brands, providing a universal smart wire solution.
• High Signal Integrity: Features advanced checksum data verification to ensure precise switching and prevent false triggers.
• Versatile Application: Supports up to 2 heat and 2 cool stages plus fan, making it suitable for multi-stage HVAC systems.
• Flexible Installation: The receiver supports a 250-foot maximum range, accommodating large residential and light commercial footprints.

Common Questions

Can I use this module to add a common (C) wire for a smart thermostat?
Yes, the UT-SWM is specifically designed to provide the necessary C-wire connection and additional control legs when the existing cable is limited to only two or three wires.

Is the UT-SWM compatible with Nest or Ecobee thermostats?
It is compatible with most smart thermostats that utilize mechanical relays. However, it is not recommended for thermostats using triacs or solid-state switching without further isolation.

Does this module cause a delay in system operation?
The binary decoding process in the relay receiver module creates a negligible transmission lag of up to 5 seconds, which does not impact standard HVAC equipment performance or cycle rates.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.