Product Overview
Table Of Contents
- Code No. LIT- 1927200
- P45 Series
- Lube Oil Pressure Cutout Control (With Time Delay)
- P45NCA
- The P45 control provides dependable, low lube oil pressure protection for refrigeration compressors. The low-adjustable factory-...
- These controls are supplied without mounting brackets. If brackets are required, order kit number BKT38A-600R, which contains five 271-51 angle mounting brackets with screws.
- The P45 control is used on semi-hermetic compressors. It measures net oil pressure available to circulate oil through the compressor’s lubrication system. (Net oil pressure is the difference between oil pump pressure and the crank case pressure.)
- For all non-corrosive refrigerants.
- Selection Chart
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. © 2009 Johnson Controls, Inc.
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P45NCA
P45 Series
Lube Oil Pressure Cutout Control (With Time Delay)
Code No. LIT-1927200
Issued February 1, 2009
Description
The P45 control provides dependable, low
lube oil pressure protection for refrigeration
compressors. The low-adjustable factory-set
pressure setting provides operation to the
compressor manufacturer’s specification. A
built-in time delay relay, compensated for
ambient temperature, allows for pressure
pick-up on start and avoids nuisance
shutdowns on short duration pressure losses
during the running cycle.
Features
• universal mounting
• trip-free manual reset
• ambient compensated time delay
Accessories
These controls are supplied without mounting
brackets. If brackets are required, order kit
number BKT38A-600R, which contains five
271-51 angle mounting brackets with screws.
Applications
The P45 control is used on semi-hermetic
compressors. It measures net oil pressure
available to circulate oil through the
compressor’s lubrication system. (Net oil
pressure is the difference between oil pump
pressure and the crank case pressure.)
Technical Specifications
For all non-corrosive refrigerants.
Electrical Rating – Pilot Duty
Time Delay
Heat Circuit
Pilot Duty
120 / 240 VAC 750 VA, 120 / 240 VAC
24 VAC 125 VA, 24 VAC
Selection Chart
Code Number Time
Delay
1
1. Relay is not field-replacable
Heater Circuit
VAC
Type of
Reset
Maximum Bellows
Pressure, psig (kPa)
Factory Setting, psid (kPa)
Fixed
Pressure
Connection
Copeland Compressors
P45NAA-5C 120 sec.
24
Manual 425 (2390) 9 (62)
2
2. Switch differential is approximately 5 psi (34 kPa). Time delay relay energizes at 9 psi (61 kPa) pressure difference, de-energizes at 14 psi (97 kPa) difference.
36 in. Cap. with
1/4 in. Flare Nut
P45NAA-10C 90 sec. 48 in. Cap. with
1/4 in. Flare Nut
P45NCA-12C
3
3. Replaces Ranco P30-5826
120 sec. 120/240
36 in. Cap. with
1/4 in. Flare Nut
P145NCA-12C
4
4. Replaces Ranco P30-5827
1/4 in. Male Flare
(Style 5)
P145NCB-12C
5
5. Replaces Ranco P30-5827 (Includes alarm wire)
Carlyle Compressors
P45NCA-82C
6
6. Replaces Carlyle/Carrier Part No. HKCA-500, 6342050
45 sec. 120/240 Manual 425 (2390) 6.5 (45)
7
7. Switch differential is approximately 4.5 psi (34 kPa). Time delay relay energizes at 6.5 psi (45 kPa) pressure difference, de-energizes at 11 psi (76 kPa)
difference.
36 in. Cap. with
1/4 in. Flare Nut
P145NCA-82C
8
8. Replaces Carlyle/Carrier Part No. HKCA-500, 6342050 with 36” SEC99A UltraCap
1/4 in. Male Flare
(Style 5)
P145NCB-82C
9
9. Replaces Carlyle/Carrier Part No. HKCA-500, 6342050 with 36” SEC99A UltraCap (Includes alarm wire)