0 = Air Handler / Coil System Control Type S = Standard - 24 VAC C = CLII 13.8 VDC Size (Footprint) A = 17.5 x 21.5 B = 21.0 x 21.5 C = 23.5 x 21.5 Cooling Size: Air Handler or Coil 0-9 = AH Coil - 1000 BTU’s (18, 24, 30, 36, 42, 48, 60) Power Supply