Brochure
Table Of Contents
- Refrigeration Products Catalog, PUBL-5510
- Product Catagories
- Table of Contents
- Code Number Index
- Single-Stage Electromechanical Temperature Controls
- A11 Series Low Temperature Cutout Controls
- A19 Series Remote Bulb Control
- A19 Series High Range Temperature Control
- A19 Series Thermostat for Crop Drying
- A19 Series Hot Water Temperature Control (Well Immersion)
- A19 Temperature Control Less Enclosure (SPDT, Close Differential
- A19 Series Thermostat for Hazardous Locations
- A19 Series Coiled Bulb Space Thermostat
- A19 Thermostat for Portable Heaters (Chain Mount and Drop Cord Electrical Connection)
- A19 Thermostat for Portable Cooling Applications (Chain Mount and Drop Cord Electrical Connection)
- A19 Series Automatic Changeover with Strap-On Mounting
- A19D Series Surface Mounted Temperature Control
- A19 Flange Mounted Duct Thermostat
- A19 Series Fan or Cutout Control (Liquid Expansion Bulb)
- A19ANC-1 Temperature Control with Rainproof Enclosure
- A19 Agricultural/Industrial Thermostat with NEMA 4X Enclosure
- A19 Industrial Thermostat (Watertight and Dusttight)
- A19 Temperature Control with NEMA 4X Enclosure (Remote Bulb)
- A19 Water Chiller Control with Locked Cut-Out/Adjustable Cut-In
- A19 Defrost Duration and Fan Delay Control
- A25 Series Warm Air Limit Control with Manual Reset
- A70 Series Four-Wire, Two-Circuit Temperature Control
- A72 Series Two-Pole Heavy Duty Temperature Controls (Adjustable Differential)
- A72 Series Cooling Tower or Evaporative Condenser Controls (Single-Stage Temperature Control with Outdoor Enclosure)
- A72AA Coiled Bulb Space Thermostat (Cooling)
- Single-Stage Electronic Temperature Controls
- A421 Series Electronic Temperature Controls
- A421 Series Electronic Temperature Controls with Integral Power Cord
- A421 Series Electronic Temperature Controls with Off-Cycle Defrost
- A421 Series Electronic Temperature Controls with Integral Cycle Timer
- MR Series Defrost Control Modules
- MR4PMUHV Electronic Temperature/Defrost Control with Relay Pack
- Multi-Stage Electromechanical Temperature Controls
- A28 Series Two-Stage Temperature Control
- A28 Series Two-Stage Flange Mounted Duct Thermostat
- A28 Two-Stage Industrial Thermostat (Watertight and Dusttight)
- A28 Two-Stage Temperature Control with Weatherproof Enclosure
- A28 Two-Stage Agricultural Thermostat with NEMA 4X Enclosure
- A36 Series Four-Stage Remote Bulb Thermostats
- S26 Series Switching Subbase
- T22/T25/T26 Series Line Voltage Wall Thermostat (Heating, Cooling, or Heating and Cooling)
- Typical Wiring Diagrams and Electrical Ratings for Line Voltage Thermostats
- T23 Series Fan Coil Thermostat (with Fan and System Selectors)
- T28 Series Fan Coil Thermostat (with or without Fan Selector Switches)
- T46 Series Fan Coil Thermostat
- Multi-Stage Electronic Temperature Controls
- Temperature Control Sensors and Accessories
- Standard Electromechanical Pressure Controls
- P10 Series Low Pressure Control
- P20 Series Air Conditioning/Pressure Cutout Control
- P29 Series Low Pressure Control with Time Delay
- P47 Series Steam Pressure Limit Control
- P67 Series Low Pressure Control
- P70, P72 Approximate Low Pressure Settings for Typical Applications
- P70, P72, and P170 Series Controls for Low Pressure Applications
- P70, P72, and P170 Series Controls for High Pressure Applications
- P70, P72, and P170 Series Controls for Dual Pressure Applications
- Single-Stage Electronic Pressure Controls
- Electromechanical Lube Oil and Differential Pressure Controls
- Electronic Lube Oil and Differential Pressure Controls
- Pressure Sensors and Accessories
- Refrigerant Sensors/Monitors
- Liquid Level and Flow Controls
- Motor Speed Controls
- Valves and Valve Accessories
- V43/V243 Series Pressure-Actuated Water-Regulating Valves
- V46 Series Pressure Actuated Water Regulating Valve
- V46N Series Reverse Acting Valve
- V46 Series Valve Sizing Information-90% Open Method
- V46 Series Valve Dimensions
- V47 Series Temperature Actuated Modulating Valve
- V47N Series Reverse Acting Valve
- V48 Series Three-Way Water Regulating Valve
- V146 Series Two-Way Pressure-Actuated Water-Regulating Valves
- V148 Series Three-Way Pressure-Actuated Water-Regulating Valves
- V246 Series Two-Way Pressure-Actuated Water-Regulating Valves for High-Pressure Refrigerants
- V248 Series Three-Way Pressure-Actuated Water-Regulating Valves for High-Pressure Refrigerants
- STT Water Valve Renewal Kit for V46, V47, and V48 Series Valves
- Companion Flanges and Gaskets for V43, V46, and V47 Series Valves
- Relays and Transformers
- System 450 Control Series
- System 450™ Series Modular Controls
- System 450™ Series Control Module with Network Communications
- System 450™ Reset Control Modules with Real-Time Clock and Relay Output
- System 450™ Control Modules with Analog Output
- System 450™ Control Modules with Relay Output
- System 450™ Control Module with Hybrid Analog Output
- System 450™ Expansion Modules with Analog Output
- System 450™ Expansion Modules with Relay Output
- System 450™ Power Module
- System 450™ Compatible Sensors, Transducers, and Accessories
- Cross-Reference
- HVACR Product Offerings
- Sales Contact Information
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, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2015 Johnson Controls, Inc. www.johnsoncontrols.com
R-64
A28PJ, A28PA Thermostat
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 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.
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.
Selection Chart
Technical Specifications
Product Code Number Switch Action Range °F (°C) Differential F° (C°) Bulb and Capillary Range Adjuster
A28PJ-1C 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
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
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
1. When used as a two-circuit control, the total connected load must not exceed 2,000 VA.
A28PA
AC Full Load A 16.0 9.2 8.0 –
AC Locked Rotor A 96.0 55.2 48.0 –
Non-Inductive or Resistance Load A
(Not Lamp Loads)
16.0 9.2 8.0 7.2
Pilot Duty 125 VA, 24 to 277 VAC
1
Multi-Stage Electromechanical Temperature Controls
Code No. LIT-1927130