Penn P72 Series Manual
Controls for high pressure applications
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Also See for P72 Series:
- Installation instructions manual (14 pages) ,
- Installation instructions manual (21 pages)
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The P70, P72, and P170 controls for high pressure
applications are designed primarily for high pressure
cut-out control, head-pressure control, and condenser
fan cycling control on commercial refrigeration and air
conditioning applications. Some models are
UL
(Underwriters Laboratories) Listed as
refrigeration pressure limiting controls.
Controls are available in several pressure ranges and
are compatible with most common refrigerants.
They may also be used on other non-corrosive fluid
applications. Ammonia compatible models are also
available.
Several different electrical ratings and switch
configurations are available. The P72 models provide
direct control of 208-240 volt single-phase motors up
to 3 hp, and 208-220 volt 3-phase motors up to 5 hp.
All Steel Case and Cover
"Sight-Set" Calibrated
Pressure Adjustment
Manual Reset Lockout
Option
A Variety of Pressure
Connection Styles
Available
© 2018 Johnson Controls
Code No. LIT-125454
P70, P72, and P170 Controls for
High Pressure Applications
Features and Benefits
Provides long lasting, rugged protection for
internal components
Displays a visible pressure scale, fully
adjustable through the range without
removing the cover (on NEMA 1 enclosure
models)
Provides "trip-free" lockout that cannot be
overridden or reset until pressure returns to
specified level
Allows greater flexibility when mounting
control and adapting pressure connections to
field application requirements
Pressure Controls Section P
Product/Technical Bulletin P70
Figure 1: P70CA-2 High Pressure Cutout Control
Master Catalog 125
Issue Date 0318
1
www.johnsoncontrols.com
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Summary of Contents for Penn P72 Series
- Page 1 Master Catalog 125 Pressure Controls Section P Product/Technical Bulletin P70 Issue Date 0318 P70, P72, and P170 Controls for High Pressure Applications The P70, P72, and P170 controls for high pressure applications are designed primarily for high pressure cut-out control, head-pressure control, and condenser fan cycling control on commercial refrigeration and air conditioning applications.
- Page 2 pplication P70, P72, and P170 Series controls for high pressure Controls are available in several pressure ranges and applications are designed primarily to provide are compatible with most common refrigerants. high-side pressure control on commercial refrigeration They may also be used on air, water and other and air conditioning applications.
- Page 3 imensions 3-1/4 5/16 2 Mounting Holes 2-15/16 (83) 10-32 UNF-2B Thread 5/16 3-1/4 5/16 (83) (25) 1-11/16 (43) 1-1/16 (29) 15/16 (24) Capillary or 3/16 Connector 15/16 1-7/8 (10) (24) as specified 3/16 Diameter (48) Diameter Mounting Hole Mounting Hole 3/16 3/16 Diameter...
- Page 4 ounting Mount the control in an accessible position, where the Mounting Holes for Flat Vertical Surfaces control and pressure connection line will not be subject to damage. Use mounting screws provided. Longer screws may damage control. CAUTION: Equipment Damage Hazard. Mount the pressure control upright and level.
- Page 5 Avoid Contact Between the Capillary Tubing and IMPORTANT: Make all wiring connections in Sharp or Abrasive Objects accordance with the National Electrical Code and all local Vibration of sharp or abrasive objects in contact with regulations. Use copper capillary tubes can result in leaks. conductors only.
- Page 6 Alarm Alarm Circuit Power Load Line Load Line Line Line Line to M1, and Line to M2 open on pressure rise. Main circuit (Line to M2) opens and *(L3 is third supply line in 3-phase applications.) auxiliary circuit (Line to M1) closes on pressure rise.
- Page 7 djustments Adjustment of the P70, P72, and P170 high pressure Turning the range screw adjusts the CUT OUT controls vary, depending on the model. The following setpoint on the right side of the scale. There is no guidelines and diagrams illustrate the procedures for differential screw on Manual Reset Lockout models.
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Page 8: Manual Reset Operation
IMPORTANT: Use the pressure control settings Manual Reset Operation recommended by the manufacturer of the controlled Pressure controls with the Manual Reset option, lock equipment. Do not exceed the out when they reach cut out pressure and must be pressure ratings of the controlled manually reset by the user to restart the controlled equipment or any of its equipment. - Page 9 Figure 10 illustrates the Johnson Controls/PENN Authorized Distributors. pressure connection styles available on P70, P72, and P170 control models. Contact your Johnson Controls/PENN Authorized Representative for availability and price. Table 2: Standard P70, P72, and P170 Controls for High Pressure Applications Code...
- Page 10 Table 3: P70, P72, and P170 Single Pressure Control Identification Chart Various pressure connection styles available on many models (See Figure 10.) P170 1/4 in. male flare pressure connection only (Style 5, see Figure 10.) DPST switch only, 3/4 in. conduit opening on most models, (E, F, G, H, J, and K, models not available) A SPST switch (DPST in P72), Open-low, automatic reset B SPST switch (DPST in P72), Open-low, manual reset lockout C SPST switch (DPST in P72), Open-high, automatic reset...
- Page 11 lectrical Ratings Table 4: SPST Electrical Ratings (P70A, B, C, and D, and P170A, C, and D Models) Standard Single-Phase Ratings Hermetic Compressor Single-Phase Ratings 120 VAC 208 VAC 240 VAC 208/240 VAC Motor Horsepower Motor Full-Load Amperes 18.7 Motor Locked-Rotor Amperes 112.2 Non-Inductive Amperes Pilot Duty...
- Page 12 Building Technologies & Solutions 507 E. Michigan Street, Milwaukee, WI 53202 ® Johnson Controls and PENN are registered trademarks of Johnson Controls in the United States of America and/or other countries. All other trademarks used herein are the property of their respective owners. © Copyright 2018 by Johnson Controls. All rights reserved.
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