Carrier 50TCQ 04 Series Service And Maintenance Instructions page 46

Serial Number Format
POSITION NUMBER
TYPICAL
1 2 3
0 4 0
POSITION
1-2
3-4
5
6-10
4 5 6
9 G 1
DESIGNATES
Week of manufacture (fiscal calendar)
Year of manufacture ("08" = 2008)
Manufacturing location (G = ETP , Texas, USA)
Sequential number
46
7 8 9 10
2 3 4 5