For the A model it is 1A-10A-2-4JG-1 and for the C model it is 1A-10C-2-4JG-1
4 Ton
4
10
2.5 tons, r22, 12 SEER
Mercury model KB-!A motors where made in 1941. This model was known as the Deluxe comet.
2.5 tonne. 10 seere
10 SEER, unit is circa 2000-2001
12 + 1a - 1a + 1 = 1 + 0 + 1 = 2
2.5 as indicated by the 30 in the model#. 12,000 btu per ton times 2.5 = 30,000 btu.
1a.
(x + 4) + (x + 5) = 2x + 9