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PENN Controls Products Catalog

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A19 Series High Range Temperature Control Description The A19 Series Controls are single-stage temperature controls that incorporate liquid-filled sensing elements. Refer to the A19 Series Hot Water Heating Controls Well Immersion Product Bulletin (LIT-125025) for important product application information. Features • wide temperature ranges available • constant differential throughout the entire range • single-pole, single-throw (SPST) or single-pole, double-throw (SPDT) snap-acting switches • fixed or adjustable differential available • unaffected by barometric pressure changes • unaffected by cross-ambient conditions • compact enclosure • variety of sensing element styles Applications The A19s are suitable for temperature control in HVAC/R applications. Figure 3: A19 Series terminal arrangement for SPDT 18

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