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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
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Technical Specifications
Pressure controls P128 and P145 are
designed to be used with SEC99 UltraCap.
Product specifications for P128 are the same
as P28 model. Refer to P28 Series Lube Oil
Pressure Cutout Control (With Time Delay)
(LIT-1927185). Product specifications for P145
are the same as P45 model. Refer to P45
Series Lube Oil Pressure Cutout Control (With
Time Delay) (LIT-1927185).
Also note the selection chart below.
P128 and P145 Series Lube Oil Pressure Controls
Description
The P128 and P145 Series Controls provide
dependable low pressure lube oil cut-out for
pressure lubricated refrigeration compressors.
The P128 Series offer adjustable range
settings.
The P128 and P145 controls feature a 1/4 in.
external flare pressure connection which may
be used with a refrigerant hose or cap tube
such as SEC99 UltraCap.
Refer to the P28 and P128 Series Lube Oil
Control with Built-in Time Delay Relay Product
Bulletin (LIT-125420) for important product
application information.
Features
• ambient compensated time delay relay
• trip-free manual reset
• industry standard
• P128 is fully adjustable throughout its
range
• P145 is factory set to compressor
manufacturer’s specifications
Applications
Use these controls for lube oil cutout on
hermetic and semi-hermetic compressors
used in commercial air-conditioning and
commercial and industrial refrigeration
systems.
Accessories
Some controls are supplied less mounting
brackets. If brackets are required, order kit
number BKT38A-600, which contains
five 271-51 angle mounting brackets with
screws; or BKT38A-601 which contains one
mounting bracket with screws.
Repair Information
If the P128 and the P145 Series Lube Oil
Pressure Control fails to operate within its
specifications, replace the unit. For a
replacement control, contact the nearest
Johnson
Controls® representative.
Selection Chart
* SEC99 UltraCap Hose must be ordered separately.
Product Code
Number
Time
Delay
Heater Circuit
VAC
Type of
Reset
Range psig (kPa) Refrigerant Pressure
Connection
Adjustable Non-Adjustable
P128AA-1C
1
1. Replacement for P28AA-1*. Replaces Ranco® P30-3701.
90 seconds 120/240 Manual 8 to 70 (55 to 483) --- Non-corrosive 1/4 in. external flared
connection
P128AA-2C
2
2. Replacement for P28AA-2*. Replaces Ranco P30-3601.
60 seconds
P128AA-17C
3
3. Replacement for P28AA-17*. Replaces Ranco P30-3801.
120 seconds
P145NCA-12C
4
4. Replacement for P45NCA-12*. (Copeland Model) Replaces Ranco P30-5826.
--- Factory Set 9 (62) Non-corrosive
P145NCA-82C
5
5. Replacement for P45NCA-82*. (Carlyle Model).
45 seconds Factory Set 6.5 (45)
P145NCB-12C
6
6. Copeland model with alarm circuit
120 seconds Factory Set 9 (62)
P145NCB-82C
7
7. Carlyle model with alarm circuit
45 seconds Factory Set 6.5 (45)
P145NCA Lube Oil Pressure
Control
P128AA Lube Oil Pressure
Control
Electromechanical Lube Oil and Differential Pressure Controls
Code No. LIT-1927280