Technicians can leverage the onboard SA Bus access port for rapid 10-foot local commissioning and troubleshooting via a laptop or handheld tool

making it ideal for high-voltage Aaon commercial units

making it the standard choice for professional contractors seeking to restore peak combustion efficiency and oil burner performance

as per Laars NTH399 service specifications

Carrier HT01BD702 Transformer 318423-701 Technicians can leverage the onboardThe Carrier HT01BD702 transformer is a critical factory authorized replacement designed to provide reliable voltage conversion for commercial HVAC systems and rooftop units. Engineered to handle a 460V primary input, this step down transformer delivers a consistent 24V secondary output, powering essential low voltage components such as thermostats, contactor coils, and integrated circuit boards. With a 75VA power rating, it offers sufficient capacity