Manufacturer: Johnson Controls |
|
Description: 60sec3'cap8/70#m/rLUBE OIL CTL
Category: Electrical Controls
Sub Category: Pressure Controls
P28 Series Lube Oil Controls
with Built-in Time Delay Relay
The P28 and P128 Series Lube Oil Controls provide
dependable and economical oil pressure cut-out 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 operate by measuring the net lube oil pressure
and de-energizing the compressor if the pressure falls
below the differential setpoint.
Manual or automatic reset models are available with
factory set and sealed time delays of 30, 45, 60, 90,
or 120 seconds (all time delays may not be available
on all models). The P128 is the same control as the
P28 but with 1/4 inch male flare pressure connections.
Features and Benefits
♦Built-in Time Delay Relay
with Ambient Compensation
Minimizes timing fluctuations due to temperature
variations
♦Trip-free Manual Reset
Provides manual reset that cannot be overridden
by pressing and holding the reset button
♦Replaceable Time Delay
Relay Assembly
Allows easy field replacement of the time delay
relay and terminal board
♦Available with Runlight and
Alarm Terminals
Allows the control to be wired for normal oil
pressure runlight signals and shutdown alarm
circuits for remote monitoring of oil pressure
status
! WARNING:
Personal injury hazard.
All
P28 and P128 controls are
designed as lubrication
protection controls. Failure of
the P28 or P128 could allow
the refrigeration compressor
to be damaged in a way that
may not be apparent upon
visual inspection. Follow
proper procedures and the
compressor manufacturer’s
instructions, as well as any
warning signs on or around
the equipment, when
discharging and
disassembling the
compressor.
Environmental damage
hazard.
If leakage of sensed
media (such as refrigerant or
oil) can be harmful to the
environment, or hazardous in
any way, user must provide
for proper containment.
Replaces Part Numbers: P28AA-2, CARP28AA-2