The D0R configuration is typically used in control schemes where the reset logic is handled by the primary burner control or through the wiring of the SPDT contacts

The 14D89 is rated for 208/230V

the heat will engage as a single block of 5kW power rather than incrementing

swapping in a genuine HH83XB422 ensures your short circuit protection meets the original equipment manufacturer's engineering standards

The NBR (Buna-N) seals in this kit are rated for a maximum temperature of 180°F

Reznor 195077 Outlet Collar 30067439-890 The D0R configuration is typicallyThe Reznor 195077 is a precision engineered 4" outlet collar designed for seamless integration with Reznor unit heaters. As a genuine OEM Reznor replacement part, this 4 inch diameter collar serves as the critical transition point between the heaters air outlet and the facility's ductwork. It is specifically manufactured to facilitate a secure, airtight seal, which is essential for maintaining proper HVAC airflow and maximizing system energy