Johnson Controls Penn P70 Series Product/Technical Bulletin
Dual pressure controls
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Also See for Penn P70 Series:
- Installation instructions manual (16 pages) ,
- Product/technical bulletin (26 pages) ,
- Manual (13 pages)
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The P70, P72, and P170 controls for dual pressure
applications are designed primarily for use as
combination high and low pressure controls on
commercial refrigeration and air conditioning
applications.
These controls are available in several pressure
ranges and are compatible with most common
refrigerants. Ammonia compatible models are also
available.
These controls respond directly to system pressure
changes on both high and low sides, and can provide
single-device control of the compressor.
Controls are available in several different electrical
ratings and switch configurations, including
independent high and low pressure switches
(on P70S and P170S models). The P72 models
provide direct control of 208-240 volt, single-phase
motors up to 3 horsepower, and 208-220 volt, 3-phase
motors up to 5 horsepower.
All Steel Case and Cover
"Sight-Set" Calibrated
Pressure Adjustments
MICRO-SET Differential
Adjustment Option
Independent High and Low
Pressure Switches
(P70S and P170S Models)
Convertible, High Pressure
Reset–Auto Reset or
Manual Reset Lockout
(P70S and P170S Models)
© 2000 Johnson Controls, Inc.
Code No. LIT-125455
P70, P72, and P170 Controls for
Dual Pressure Applications
Features and Benefits
Provides long lasting, rugged protection for
internal components
Provides visible pressure scales, fully
adjustable through all ranges without
removing the cover
Allows for precise pressure control of low
pressure applications
Satisfies a variety of dual pressure application
wiring requirements with a single versatile
control
Reduces inventory—one control can be
adapted to several dual pressure applications
in the field
Pressure Controls Section P
Product/Technical Bulletin P70
Figure 1: P70SA-1 Dual Pressure Control
Master Catalog 125
Issue Date 0900
1
www.johnsoncontrols.com
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Related Manuals for Johnson Controls Penn P70 Series
Summary of Contents for Johnson Controls Penn P70 Series
- Page 1 (P70S and P170S Models) control Convertible, High Pressure Reduces inventory—one control can be Reset–Auto Reset or adapted to several dual pressure applications Manual Reset Lockout in the field (P70S and P170S Models) © 2000 Johnson Controls, Inc. Code No. LIT-125455 www.johnsoncontrols.com...
- Page 2 P72, and P170 controls for dual pressure applications, which are available through most authorized manual reset lockout mechanism that may be Johnson Controls/PENN distributors. converted to automatic reset. • P70L, M, N, and P170L, M, N models have a Single-Pole Single-Throw (SPST) switch.
- Page 3 imensions Two Mounting Holes Reset Button for Controls 5/16 with both High and Low 10-32 UNF-28 Thread 2-7/8 5/16 (15) Side Reset (73) (127) 3/16 Diameter Mounting Hole 5/16 3-1/4 (83) (25) 1-11/16 1-1/8 (43) (29) 15/16 13/16 (95) 11/16 (20) 15/16 1-3/4...
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Page 4: Pressure Connections
ounting Mount the control in an accessible position, where the Mounting Holes for Flat Vertical Surfaces control and pressure connection lines will not be Use mounting screws subject to damage. provided. Longer screws may damage control. CAUTION: Equipment Damage Hazard. Mount the pressure control upright and level. - Page 5 Avoid Contact Between the Capillary Tube 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 All-Range Controls (Low Side Only) The low side of All-Range pressure controls has a scaleplate that displays the CUT IN and CUT OUT High Alarm Alarm setpoints. (See visible scale on left side of control.) Load Turning the range screw adjusts the CUT IN and CUT OUT setpoints up or down simultaneously, while maintaining a constant pressure differential.
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Page 7: Manual Reset Operation
IMPORTANT: Use the pressure control settings IMPORTANT: After installing and adjusting recommended by the pressure control, and before manufacturer of the controlled leaving installation, cycle the equipment. Do not exceed the controlled equipment several pressure ratings of the controlled times (at least three) at normal equipment or any of its operating conditions. - Page 8 Convertible High Pressure Reset The Limited Knob Adjustment may be installed at the factory or included as a separate kit, depending on the Mechanism on P70S and P170S Controls model ordered. To install the Limited Knob Adjustment The P70S and P170S type dual pressure controls are kit refer to the following guidelines and steps.
- Page 9 P70, P72, and Johnson Controls/PENN Authorized Distributors. P170 control models. Contact your Johnson Controls/PENN Authorized Representative for availability and price. Table 1: Standard Model Selection Chart for P70, P72, and P170 Dual Pressure Controls Model...
- Page 10 Table 2: Identification Matrix for P70, P72, and P170 Controls Dual Pressure Applications Various pressure connection styles available on many models (See Figure 13.) P170 1/4 in. male flare pressure connection only (Style 5, see Figure 13.) DPST switch only, 3/4 in. conduit opening on most models, (P,Q, R, S, types not available) SPST switch (except P72), automatic reset M SPST switch (except P72), high side manual reset lockout switch N SPST switch (except P72), high and low side manual reset lockout switch...
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Page 11: Electrical Ratings
lectrical Ratings Table 3: SPST Electrical Ratings (P70L, M, and N, and P170L, M, and N Types) 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: Specifications
The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these specifications, contact Refrigeration Application Engineering at (414) 524-5535. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products.
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