It features clear terminal markings for 24VAC power (R and B/Common)

lowering energy consumption for the end-user

OEM Precision: Direct replacement for 3900-2014-000 ensures exact physical dimensions for fast installation

particularly within the Lochinvar and A

provided the 7

Utica-Dunkirk Z99 Control Refrigerant It features clear terminal markingsThe Utica Dunkirk Z99 Control (Main Control Relay Board) serves as the primary logic and distribution hub for specific gas fired boiler configurations. This OEM replacement part is engineered to manage critical sequencing, including circulator pump delays, inducer motor activation, and safety limit monitoring. For technicians troubleshooting intermittent ignition cycles or failure in the boiler control circuit, this board provides the necessary 24VAC