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-108
P74EA-8 Differential
Pressure Control
P74 Series Differential Pressure Control
Description
Series P74 measures the pressure difference
between two sources: supply lines and return
lines. A change in differential pressure will
reposition the switching mechanism to cause
corrective action of the supplementary control
equipment.
Refer to the P47 Series Steam Pressure
Controls Product Bulletin (LIT-125450) for
important product application information.
Features
• field-proven Penn switch with a completely
enclosed contact mechanism
• pressure differential setting is easily
changed without removing the cover
Applications
• differential pressure sensing on chillers or
water-cooled condensers
• lube oil failure cutout for refrigeration
compressors (same as the P28, but does
not incorporate time delay)
• positioning M100 Series motor-actuated
valves (P74JA-2)
• to prove pump operation
Accessories
All models on this page include a universal
mounting bracket.
Repair Information
If the P74 Series Differential Pressure Control
fails to operate within its specifications, replace
the unit. For a replacement control, contact the
nearest Johnson
Controls®
representative.
Selection Chart
Technical Specifications
Product Code
Number
Switch
Action
Range Pressure Differential
psig (kPa)
1
1. Maximum continuous pressure to low pressure bellows - 180 psig (1,241 kPa)
Switch
Differential
Pressure
Connections
Bellows
Material
For All Non-Corrosive Liquids
P74AA-1C Single-Pole, Single-Throw (SPST) closes on
decreases in pressure difference
8 to 70 Adjustable
(55 to 483)
8 to 30 Adjustable 36 in. capillary with
1/4 in. flare nut
Stainless
steel
P74BA-1C SPST opens on decrease in pressure difference
P74EA-8C Single-Pole, Double-Throw (SPDT) (snap-acting) 2 to 26 Adjustable
(14 to 207)
3.5 Fixed 36 in. capillary with
1/4 in. flare nut
Brass
P74EA-10C 1/4 in. external flare
P74FA-1C 8 to 60 Adjustable
(55 to 414)
1.5 Fixed
P74FA-5C 1/4 in. FNPT
P74FA-10C 2 to 26 Adjustable
(14 to 207)
36 in. capillary with
1/4 in. flare nut
P74JA-2C SPDT (floating) 8 to 60 Adjustable
(55 to 414)
2.5 Fixed 1/4 in. external flare
Electrical Ratings
Motor Ratings 120 V 208 V 240 V 277 V
P74AA, P74BA - 1 Phase
AC Full Load A 20.0 18.7 17.0 —
AC Locked Rotor A 120.0 112.2 102.0 —
AC Non-Inductive A 22.0 22.0 22.0 —
Pilot Duty 125 VA, 120 to 600 VAC; 57.5 VA, 120 to 300 VDC
P74EA
AC Full Load A 16.0 9.2 8.0 —
AC Locked Rotor A 96.0 55.2 48.0 —
AC Non-Inductive A 16.0 16.0 16.0 16.0
Pilot Duty 125 VA, 120 to 600 VAC
P74FA
AC Full Load A 6.0 3.4 3.0 —
AC Locked Rotor A 36.0 20.4 18.0 —
AC Non-Inductive A 10.0 10.0 10.0 10.0
Pilot Duty 125 VA, 120 to 277 VAC
P74JA
1 A; 24 VAC Class 2; 50/60 Hz
Electromechanical Lube Oil and Differential Pressure Controls
Code No. LIT-1927260