IO Hvac Controls iO-DFK-ODT Thermostat

For service technicians managing dual-fuel configurations, the iO-DFK-ODT Outdoor Thermostat is a critical component for precise balance point control. This bi-metal thermostat is engineered to interface directly with the iO-DFK Dual Fuel Kit, enabling seasonal efficiency by managing the transition between a heat pump and a fossil fuel furnace. With a SPDT switch configuration and a control range of 0?F to 100?F (or 110?F depending on specific sensor revision), this unit provides the physical lockout needed to prevent auxiliary heat from energizing above a high balance point or to cycle off the compressor below a low balance point.

The iO-DFK-ODT features a rugged, outdoor-rated design housed in a compact enclosure, making it suitable for mounting within the condenser unit or on an exterior wall. It handles up to 22 amps resistive, supporting high-draw 24VAC control circuits. By integrating this mechanical outdoor thermostat into your dual fuel application, you ensure the system maintains optimal COP by only running the heat pump when ambient temperatures allow for efficient heat extraction, then seamlessly switching to the furnace for emergency heat or high-demand cycles.

• Universal Application: Designed as the dedicated outdoor balance point thermostat for the iO-DFK kit, but versatile enough for any 24V temperature-based switching requirement.
• Precise Differentials: Features a rated differential of 4-6?F (cooling/heating spread) to prevent short-cycling of the HVAC system.
• Simplified Integration: Includes standard screw terminals and wire-color coding (Red, Blue, Black) for fast field installation and troubleshooting.
• Heavy-Duty Reliability: UL Listed and CSA Certified components ensure long-term performance in extreme weather conditions.
• Optimized Efficiency: Effectively manages energy savings by locking out expensive electric backup heat when outdoor temperatures are above the setpoint.

How do I wire the iO-DFK-ODT for high balance point control?
For high balance point applications (preventing auxiliary heat above a setpoint), use the Red and Black leads. These contacts open when the temperature rises above your chosen setpoint.

Can this thermostat be used without the iO-DFK control board?
Yes, as a SPDT bi-metal thermostat, it can function as a standalone low temperature lockout or high-limit switch for various 24VAC HVAC controls.

What is the factory default balance point?
While adjustable from 0? to 100?F, it is often utilized with a 35?F factory-standard reference for dual-fuel changeover, though technicians should calibrate based on the specific heat pump?s thermal balance point.

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.