Carrier PY5G B Series Installation Instructions Manual page 7
13.4 seer2 single-packaged air conditioner and gas furnace system with r-454b refrigerant single phase 2-5 nominal tons (sizes 24-60) three phase 3-5 nominal tons (sizes 36-60)
*. Part Number CPRCURB011B00 can be used on both small and large basepan units. The cross supports must be located based on whether the unit is a small basepan or a large
basepan.
NOTES:
1.
Roof curb must be set up for unit being installed.
2.
Seal strip must be applied, as required, to unit being installed.
3.
Roof curb is made of 16-gauge steel.
4.
Attach ductwork to curb (flanges of duct rest on curb).
14 seer single and three phase single packaged air conditioner and gas furnace system with r-410a refrigerant 2-5 nominal tons (sizes 24-60) (10 pages)
15.2+ seer2 2-stage packaged air conditioner and gas furnace system with r-410a refrigerant single and three phase 2-5 nominal tons sizes 24-60 (61 pages)
14 seer single--packaged air conditioner system with r--410a refrigerant single phase 2--5 nominal tons (sizes 24-60) three phase 3-5 tons (sizes 36-60) (38 pages)