Trane 4YCY4042C Installer's Manual page 15

Supply Air
Return Air
Roof Flashing
Channel Iron Center
Support (Center Sup-
port required on all
Frame Applications.)
Figure 12. Typical Rooftop Horizontal Airflow Application with Frame
Return Air
Roof Flashing
Channel Iron Center Support
(Center Support required on all
Frame Applications.)
Figure 13. Typical Rooftop Down Airflow Application with Frame
Installer's Guide
Angle Iron Frame
Supply Air
Roof Flashing
Angle Iron Frame
Page 15