IO Hvac Controls iO-DFK Dual Fuel Kit

The iO-DFK Dual Fuel Kit provides seamless management for hybrid heating systems combining an electric heat pump with a fossil fuel furnace. Engineered for simplified dual fuel heat pump control, this kit handles up to 4 stages of heating and 2 stages of cooling. It utilizes professional quiet relay technology to prevent the heat pump and furnace from operating simultaneously, effectively protecting the compressor. The included iO-DFK-ODT outdoor thermostat acts as a precise balance point control, automatically locking out the heat pump when ambient temperatures drop below the technician-defined setpoint (0?F to 100?F). For streamlined field work, the board features snap track mounting, easy-to-read screw terminals, and a dedicated selector switch for 'O' or 'B' reversing valve configurations. With an integrated LED auxiliary heat indicator, contractors can verify system status at a glance, ensuring optimal hvac fuel switching efficiency without additional complex wiring.

• Universal Compatibility: Works with all major heat pump brands using either 'O' or 'B' reversing valve signals.
• Enhanced Efficiency: Automatically switches to furnace heat at the optimal balance point to maintain COP.
• Reduced Installation Time: Snap track base and labeled terminals allow for a clean, professional-grade cabinet layout.
• System Protection: Blower control logic ensures the fan stops and restarts at correct speeds during fuel changeover.
• Expandable Monitoring: Supports an optional discharge air thermostat (DFK-DAT) to keep supply air at 90?F during defrost cycles.

Can I use this with a 2-stage heat pump?
Yes, the iO-DFK is designed to manage multi-stage equipment, supporting up to 2 stages of cooling and 4 stages of heating for advanced heat pump furnace integration.

What is the default balance point?
The included outdoor thermostat is typically factory-set at 35?F, but it is fully adjustable from 0?F to 100?F to suit specific climate zones and equipment specifications.

Does this kit include the outdoor sensor?
Yes, the iO-DFK comes standard with the outdoor balance point thermostat required for automatic changeover logic.

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.