Trane 5TXCA001AS3HCA Installer's Manual page 16

Installer's Guide
Notes:
1. Installation of air cleaner will require replacement of furnace transformer. Refer to air cleaner literature.
2. For legacy 40" furnaces (models *UD, *UH, *DD, *DH), do not use EAC wire on the furnace control board. Wire
as shown in this diagram.
16 18-AD47D1-1B-EN