Nominal Cooling Capacity - Tons 092 = 7.5 Tons 102 = 8.5 Tons 120 = 10 Tons 150 = 12.5 Tons Cooling Efficiency H = High Efficiency Refrigerant Type 4 = R-410A Heating Type S = Standard Gas Heat, 2 Stage M = Medium Gas Heat, 2 Stage H = High Gas Heat, 2 Stage Minor Design Sequence 1 = 1st Revision 2 = 2nd Revision 3 = 3rd Revision Voltage