To configure the NFW2-100 NACs for Class A (Style Z) wiring, you must reorient the NACKEY card at jumper JP6. Note that switching to Class A reduces the available circuits from four Class B to two Class A circuits, as the NAC 3 and NAC 4 terminals are used for the returns (Page 9) [1].
Locate JP6 at the top of the main circuit board near terminal blocks TB3 and TB4 (Page 29) [1].
Remove the NACKEY card from the slot. 3. Reorient the card so the side labeled Class A points down toward the circuit board (Page 29) [1].
Insert the card into JP6 with the text side facing the center of the main circuit board (Page 29) [1].
Ensure the card is properly seated in the keyed slot to prevent incorrect insertion (Page 29) [1].
Dummy load all unused circuits (Page 29) [1].
