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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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P545 Series Electronic Lube Oil Control
Description
The P545 Series Electronic Lube Oil Control is
designed for use on refrigeration compressors
equipped with an oil pump that accepts a
single-point differential pressure switch. The
P400 switch continuously monitors net lube oil
pressure and the P545 control locks out the
compressor if lube oil pressure falls below the
manufacturer's recommended net pressure for
longer than the recommended lube oil time
delay. Front-mount LEDs indicate the status of
the lubrication system, and a user-selectable,
minimum-off time delay can be set to minimize
compressor short cycling.
A Johnson Controls/PENN® R310AD Current
Sensing Switch, sold separately, may be used
to disable the P545 control lockout circuit
during abnormal compressor shutdowns.
Refer to the P545 Series Electronic Lube Oil
Control Product Bulletin (LIT-12011012) for
important product application information.
Features
• single-pole, double-throw (SPDT) relay
contacts for liquid line solenoid and alarm
applications allow liquid line solenoid to be
closed if the P545 control shuts off the
compressor due to low oil pressure and
provides alarm indication, including circuits
that use neon lights
• relay contact output for compressor
provides reliable, long-lasting operation
• built-in test circuit verifies proper control
operation quickly, without additional tools
or equipment
• improved noise immunity exceeds
immunity requirements of UL 991 for
transient overvoltage: IEC 61000-4-3 for
radiated Radio Frequency (RF) and IEC
61000-4-6 for RF-induced conducted
disturbances
• jumper-selectable anti-short cycle time
delays provide for a wide range of
anti-short cycle strategies that meet most
equipment requirements— the anti-short
cycle delay feature may allow for the
elimination of an external short-cycle timer
• user-friendly display panel displays the
status of the compressor lubrication system
continuously
• backwards compatibility allows easy
replacement of existing electronic lube oil
controls
Repair Information
If the P545 Series Electronic Lube Oil Control
fails to operate within its specifications, replace
the unit. For a replacement control, contact the
nearest Johnson
Controls® representative.
Selection Charts
P545 Series Electronic Lube Oil Control
Product Code Number Lube Oil Delay (Seconds) P400 Switch Wiring Harness Fits Compressors Manufactured by
P545NCB-22C
1
1. Switch and wiring harness included
120 P400AD-2 WHA-P400-100 Copeland
P545NCB-25C
1
90 P400BD-1 WHA-P400-125 Bitzer
P545NCB-82C
1
120 P400AD-1 WHA-P400-100 Carlyle
Control and Sensor/Switch Compatibility
Test P345 or P445 Control
with P400 Switch
P545 Control and
P400 Switch
Wiring Harness
1
1. WHA-P400-xxx is the two-wire harness supplied with the P545 control and the P400 switch.
WHA-P400-xxx WHA-P400-xxx
Test Switch Does not function
2
2. When the P445 Control is wired to a P400 Switch, the Test button may operate when first powered
up; however, after a couple minutes of operation, the Test Switch function no longer works. All other
control functions operate normally.
Immediate
P545 Control with P400 Switch
Electronic Lube Oil and Differential Pressure Controls
Code No. LIT-1900355