Reznor 258867 TXV Kit 321894-708 a 1-pole control will leave

a 1-pole control will leave one leg of power hot at the heater

Smith 100109976 Control Board is a critical integrated electronic control module designed for high-efficiency boilers and commercial water heaters

For suction-side monitoring

and various caustic fluids

ensuring precise zone flow control

Reznor 258867 TXV Kit 321894-708 a 1-pole control will leaveThe Reznor 258867 TXV Kit is a field installed R 410A thermostatic expansion valve designed specifically for precise refrigerant metering in high efficiency cooling systems. This TXV replacement kit ensures optimal superheat control across varying load conditions, preventing liquid slugging and protecting the compressor. Engineered for compatibility with Reznor ACUC180, AUD2, and AUH3 series units, this kit facilitates a direct mechanical fit for 15