The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these specifications, consult the local Johnson Controls office.Johnson Controls shall not be liable for damages resulting from misapplication or misuse of its products. © 2018 Johnson Controls.www.penncontrols.com1 A28PJ, A28PA ThermostatA28 Two-Stage Agricultural Thermostat with NEMA 4X Enclosure Catalog PageDescriptionThe 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 atmospheresApplicationsDesigned for use in agricultural and industrial applications that require compliance with Article 547 of the National Electrical Code.Repair InformationIf the A28 Two-Stage Agricultural Thermostat with NEMA 4X Enclosure fails to operate within its specifications, replace the unit. For a replacement thermostat, contact the nearest Johnson Controls® representative.Selection Chart Technical Specifications Product Code NumberSwitch ActionRange °F (°C)Differential F° (C°)Bulb and CapillaryRange AdjusterA28PJ-1CTwo-SPDT30 to 110(-1 to 43)2 (1.1) each stage2 to 7 (1.1 to 3.9) adjustable between stages1-3/8 in. x 2-1/4 in.coiledKnobA28PA-2CTwo-SPDT30 to 110(-1 to 43)2 (1.1) each stage2 to 7 (1.1 to 3.9) adjustable between stages1-3/8 in. x 2-1/4 in.coiledKnobElectrical RatingsMotor Ratings VAC120208240277A28PJAC Full Load A6.03.43.0–AC Locked Rotor A36.020.418.0–Non-Inductive or Resistance Load A (Not Lamp Loads)10.09.28.07.2Pilot Duty 125 VA, 24 to 277 VAC11.When used as a two-circuit control, the total connected load must not exceed 2,000VA.A28PAAC Full Load A16.09.28.0–AC Locked Rotor A96.055.248.0–Non-Inductive or Resistance Load A (Not Lamp Loads)16.09.28.07.2Pilot Duty125 VA, 24 to 277 VAC1Code No. LIT-1927130Issued June 2018Next >