Product Overview

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. © 2006 Johnson Controls, Inc.
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P399 Series
Electronic Pressure Transducers
P399
Electronic Pressure Transducer
Code No. LIT-1900018
Issued July 1, 2006
Description
The P399 Series Electronic Pressure
Transducer is a compact, economical, rugged,
direct-mount pressure transducer designed to
produce a low voltage analog signal
(0.5 to 4.5 VDC nominal ) based on the
sensed pressure. They are designed for use
in commercial refrigeration and air-
conditioning applications.
The P399 Transducer features welded
stainless steel construction with
environmentally sealed electronics. They are
resistant to the effects of wide temperature
swings, high humidity, condensation, and
icing. They are suitable for use with all non-
corrosive refrigerants as well as ammonia.
P399 Transducers are available in several
pressure ranges (up to 750 psis), covering
most common refrigeration and air
conditioning applications.
Pressure connections are available in one of
two standard styles:
• 1/4 in. SAE female flare fitting (with
Schrader valve depressor)
• 1/8 in. NPT male fitting
The wiring harness is purchased separately or
included with the P399xxx-1-200C.
Features
• affordable
• rugged stainless steel construction
provides a durable assembly and
eliminates potential refrigerant loss due to
O-ring failures - resists Electromagnetic
Interference (EMI) and damage due to
shock, vibration, and pressure pulsations
• environmentally sealed electronics
withstand the effects of adverse conditions
found in typical equipment rooms
• reliable, repeatable performance and long
operating life minimizes service and
replacement costs
• available in several pressure ranges (up to
750 psis) to provide a single line of
transducers for all refrigeration and air
conditioning application needs
Selection Chart
Code Number Description
P399AAA-1C Pressure Transducer, 0-100 psis, 1/8 in. NPTM pressure
connection
P399AAC-1C Pressure Transducer, 0-100 psis, 1/4 in. SAE female flare
pressure connection with valve depressor
P399BAA-1C Pressure Transducer, 0-500 psis, 1/8 in. NPTM pressure
connection
P399BAC-1C Pressure Transducer, 0-500 psis, 1/4 in. SAE female flare
pressure connection with valve depressor
P399CAA-1C Pressure Transducer, 0-750 psis, 1/8 in. NPTM pressure
connection
P399CAC-1C Pressure Transducer, 0-750 psis, 1/4 in. SAE female flare
pressure connection with valve depressor
P399GAA-1C
1
1. Not applicable to System 350™ Pressure Controls
Pressure Transducer, 0-200 psis, 1/8 in. NPTM pressure
connection
P399AAA-1-200C Pressure Transducer, 0-100 psis, 1/8 in. NPTM pressure
connection, with 6-1/2 ft (2m) wire harness with pigtails
P399AAC-1-200C Pressure Transducer, 0-100 psis, 1/4 in. SAE female flare
pressure connection with valve depressor, with 6-1/2 ft
(2m) wire harness with pigtails
P399BAA-1-200C Pressure Transducer, 0-500 psis, 1/8 in. NPTM pressure
connection, with 6-1/2 ft (2m) wire harness with pigtails
P399BAC-1-200C Pressure Transducer, 0-500 psis, 1/4 in. SAE female flare
pressure connection with valve depressor, with 6-1/2 ft
(2m) wire harness with pigtails
P399CAA-1-200C Pressure Transducer, 0-750 psis, 1/8 in. NPTM pressure
connection, with 6-1/2 ft (2m) wire harness with pigtails
P399CAC-1-200C Pressure Transducer, 0-750 psis, 1/4 in. SAE female flare
pressure connection with valve depressor, with 6-1/2 ft
(2m) wire harness with pigtails
Accessories
Note: Wiring harness must be ordered separately.
Technical Specifications
Code Number Description
WHA-P399-200C Wire Harness, 6 1/2 ft (2.0 m.) length with pigtails
WHA-P399-400C Wire Harness, 13 ft (4.0 m.) length with pigtails
WHA-P399-600C Wire Harness, 19-5/8 ft (6.0 m.) length with pigtails
P399 Electronic Pressure Transducer
Overpressure 3x upper range limit, short term
Burst Pressure 5x upper range limit
Vacuum 30 microns max (0.03 mm Hg) short term
Media Compatibility Noncorrosive refrigerants, refrigeration
lubricating oils, ammonia
Supply Voltage 5.00 ± 0.25 VDC ratiometric range,
6.0 VDC maximum
Current Draw 5 mA maximum @ 5.0 VDC
Output Signal Ratiometric, 10% to 90% of supply voltage
(0.5 to 4.5 VDC nominal)
Pressure Connections 1/8 in. NPT male, direct mount
1/4 in. SAE female flare with Schrader valve
depressor, direct mount
Temperature
and Humidity
Storage -40 to 257
o
F (-40 to 125
o
C)
Ambient -40 to 158
o
F (-40 to 70
o
C)
Refrigerant -40 to 300
o
F (-40 to 149
o
C); 0 to 100% RH
Accuracy ±1.5% Span, -4 to 212
o
F (-20 to 70
o
C);
±2.0% Span, -40 to -4
o
F (-40 to -20
o
C)
Materials Connector Nylon, 30% glass filled
Main Body Stainless steel all welded construction
(304L)
Vibration 10G, 20-2000 Hz maximum