![Johnson Controls P28AA-1E Lube Oil Cutout, 90 Sec Delay [New]](https://cdn11.bigcommerce.com/s-hdj6s/images/stencil/500x659/products/71138/149391/1ca11afa-5ee5-5847-968d-ea95a335e07d__47577.1794002995.png?c=2 "Johnson Controls P28AA-1E Lube Oil Cutout, 90 Sec Delay [New]")
![Johnson Controls P28AA-1E Lube Oil Cutout, 90 Sec Delay [New]](https://cdn11.bigcommerce.com/s-hdj6s/images/stencil/500x659/products/71138/149392/cbe51c55-a88a-52ca-960e-67354174e6f2__72773.1794002996.jpg?c=2 "Johnson Controls P28AA-1E Lube Oil Cutout, 90 Sec Delay [New]")
Description
P28 Series Lube Oil Pressure Cutout Control with Time Delay - net oil pressure safety control with built-in, ambient-compensated time delay and trip-free manual reset.
The P28 series provides dependable lube oil protection on pressure of lubricated refrigeration compressors by sensing low lube oil pressure. A built-in time delay switch, accurately compensated for ambient temperature, allows for pressure pick up on start and avoids nuisance shutdowns on pressure drops of short duration during the running cycle.
The P28 and P128 Series Lube Oil Controls provide dependable and economical oil pressure cutout for pressure-lubricated refrigeration compressors. The field-adjustable pressure differential of these controls provides compressor operation according to the manufacturer's specifications. The P28 and P128 controls measure the net lube oil pressure and de-energize the compressor if the pressure falls below the differential setpoint.
Features
* Direct-reading scale indication
* Adjustable setpoint
* Trip-free manual reset
* Replacement timing relays available
* Dust-protected switch
* Built-in time delay relay, ambient temperature compensated
Applications
* Semi-hermetic compressors
* P28 Control measures pressure available to circulate oil through the lubrication system (net oil pressure is the difference between oil gauge and crankcase pressure)
Accessories
* All models listed in the OEM catalog page include a universal mounting bracket
* Replacement timing relays - refer to Replacement Timing Relays for P28 and P29 Lube Oil Controls Catalog Page (LIT-1927395)
DASH NUMBER NOT OEM-DOCUMENTED. The P28AA-1E product code is not itemised in the Johnson Controls PENN selection chart for the P28 Series, which lists the P28AA-1C (90 seconds), the P28AA-17C (120 seconds) and the P28AA-18C (45 seconds), all 120/240 VAC time delay heater circuit, manual reset, 8 to 70 psi. The P28AA-1C is the closest documented equivalent (90 seconds time delay). Confirm the time delay and range from the control scale and label before fitting.
Specifications
* Brand / Manufacturer: Johnson Controls / PENN
* Model / Part Number: P28AA-1E
* Type: P28 Series Lube Oil Pressure Cutout Control with Time Delay
* Time Delay: 90 seconds per the OEM chart for the P28AA-1C - not separately documented for this dash number; confirm from the unit label
* Time Delay Heater Circuit (OEM): 120/240 VAC
* Cross-Reference (OEM): The P28AA-1C replaces Ranco® P30-3701
* Range (OEM): 8 to 70 psi (55 to 483 kPa)
* Switch Differential (OEM): Approximately 5 psig (34 kPa); time delay relay energizes at 9 psig (61 kPa) pressure difference and de-energizes at 14 psig (97 kPa) difference
* Type of Reset (OEM): Manual (trip-free)
* Refrigerant (OEM): Non-corrosive refrigerants, including R-12, R-22, R-134A, R-500 and R-502
* Pressure Connection (OEM): 36 in. capillary with 1/4 in. flare nut
* Maximum Bellows Pressure (OEM): 180 psig (2,241 kPa)
* Electrical Ratings - Pilot Duty (OEM): Time delay heater circuit 750 VA at 120/240 VAC; pilot circuit 125 VA at 120/240 VAC; alarm circuit 10 A at 120 VAC, 5 A at 240 VAC; 24 VAC/VDC circuits 125 VA at 24 VAC, 57.5 VA at 24 VDC; runlight 10 W
* Reference Documentation: P28 and P128 Series Lube Oil Controls with Built-in Time Delay Relay Product Bulletin, LIT-125420; PENN Refrigeration Products Catalog
* Condition: New
Johnson Controls / Johnson Controls
P28AA-1E / P28AA1E
P28AA-1E / P28AA1E
Warranty Information
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