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PENN Controls Products Catalog

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A28 Two-Stage Agricultural Temperature Control with NEMA 4X Enclosure Description The A28PJ and A28PA are two-stage temperature controls with raintight and dusttight enclosures. Refer to the A28 Series Two-Stage Temperature Controls with NEMA 1 Enclosure Product Bulletin (LIT-125130) for important product application information. Features • Rugged thermoplastic gasketed enclosures that meet NEMA 4X specifications • O-ring sealed setpoint adjustment knobs • Range scale with oversized white markings for easy readability in low light • Exposed portion of liquid-filled sensing elements are plated and plastic coated to resist damage in corrosive atmospheres Applications Designed for use in agricultural and industrial applications that require compliance with Article 547 of the National Electrical Code. Selection chart Table 54: Selection chart Product Code Number Switch Action Range °F (°C) Differential F° (C°) Bulb and Capillary Range Adjuster A28PJ-1C Two single- pole, double- throw (SPDT) 30 to 110 (-1 to 43) 2 (1.1) each stage 2 to 7 (1.1 to 3.9) adjustable between stages 1-3/8 in. x 2-1/4 in. coiled Knob A28PA-2C Two- SPDT 30 to 110 (-1 to 43) 2 (1.1) each stage 2 to 7 (1.1 to 3.9) adjustable between stages 1-3/8 in. x 2-1/4 in. coiled Knob A28 Two-Stage Agricultural Temperature Control with NEMA 4X Enclosure technical specifications Table 55: Electrical Ratings Motor Ratings VAC 120 208 240 277 A28PJ AC Full Load A 6.0 3.4 3.0 – AC Locked Rotor A 36.0 20.4 18.0 – Non-Inductive or Resistance Load A (Not Lamp Loads) 10.0 9.2 8.0 7.2 Pilot Duty 125 VA, 24 to 277 VAC 1 A28PA AC Full Load A 16.0 9.2 8.0 – AC Locked Rotor A 96.0 55.2 48.0 – 53

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