Johnson Controls A28PA-2C, A28PJ-1C Data Sheet
Multi-Stage Electromechanical Temperature Controls |
Code No. LIT-1927130 |
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A28 Two-Stage Agricultural Thermostat 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 NEMA1 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.
Repair Information
If 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.
A28PJ, A28PA Thermostat
Selection Chart
Product Code Number |
Switch Action |
Range °F (°C) |
Differential F° (C°) |
Bulb and Capillary |
Range Adjuster |
A28PJ-1C |
Two-SPDT |
30 to 110 |
2 (1.1) each stage |
1-3/8 in. x 2-1/4 in. |
Knob |
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(-1 to 43) |
2 to 7 (1.1 to 3.9) adjustable between stages |
coiled |
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A28PA-2C |
Two-SPDT |
30 to 110 |
2 (1.1) each stage |
1-3/8 in. x 2-1/4 in. |
Knob |
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(-1 to 43) |
2 to 7 (1.1 to 3.9) adjustable between stages |
coiled |
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Technical Specifications
Electrical Ratings |
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Motor Ratings VAC |
120 |
208 |
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240 |
277 |
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A28PJ |
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AC Full Load A |
6.0 |
3.4 |
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3.0 |
– |
AC Locked Rotor A |
36.0 |
20.4 |
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18.0 |
– |
Non-Inductive or Resistance Load A |
10.0 |
9.2 |
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8.0 |
7.2 |
(Not Lamp Loads) |
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Pilot Duty |
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125 |
VA, 24 to 277 VAC1 |
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A28PA |
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AC Full Load A |
16.0 |
9.2 |
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8.0 |
– |
AC Locked Rotor A |
96.0 |
55.2 |
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48.0 |
– |
Non-Inductive or Resistance Load A |
16.0 |
9.2 |
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8.0 |
7.2 |
(Not Lamp Loads) |
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Pilot Duty |
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125 |
VA, 24 to 277 VAC1 |
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1. When used as a two-circuit control, the total connected load must not exceed 2,000 VA.
The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these specifications, consult th Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2015 Johnson Controls, Inc.
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