Johnson Controls A28AA-4C Two Stage Temperature Control, 30/110F, Diff 3.5 Fixed, 2-SPDT, Nema 1, 1Hp, Coiled Bulb. JCI (PENN) A28 Series Two Stage Temperature Control for temp sensing applications requiring two-stage control of HVAC/R equipment. Features wide temperature ranges, single-pole, double-throw (SPDT) snap-acting switches and offer a variety of sensing elements.
