The Network Interface Module (NIM) is used to interface the following devices to the Infinity ABCD bus so they can be controlled by the Infinity System. The following devices do not have communication ability and the NIM is required to control:
A Heat Recovery Ventilator / Energy Recovery Ventilator (HRV/ERV) (when zoning is not applied).
A non-communicating single-speed heat pump with Infinity furnace (dual fuel application only).
A non-communicating two-speed outdoor unit (R-22 Series-A unit).