as per Laars NTH399 service specifications

If the switch detects a rollout

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

Precision Draft Calibration: Field-adjustable from

Does this model allow for pilot flame adjustment

Carrier HT01BD702 Transformer 318423-701 as per Laars NTH399 serviceThe 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