Johnson Controls System 350 P352AB Series Product Manual

P352AB Electronic Pressure Control Series
The P352AB controls are On/Off electronic pressure
controls with Single-Pole, Double-Throw (SPDT) relay
output and Light-Emitting Diode (LED) indication. The
P352AB controls are designed with Reverse or Direct
Acting mode of operation, adjustable differential, and
an interchangeable pressure transducer. The P352AB
control will accept S352A Stage Modules to control
stages of Heating, Ventilating, and Air Conditioning
(HVAC) and/or refrigeration equipment.
Three models cover the ranges of 0-100 psi,
90-250 psi, and 240-600 psi, covering most common
refrigeration and air conditioning applications.
As are all System 350™ products, the P352AB control
is housed in a NEMA 1 high-impact thermoplastic
enclosure. The modular design provides easy,
snap-together connections for quick installation and
future expandability.
❑
Modular Design
❑
Plug-together Connectors
and 35 mm DIN Rail
Mounting
❑
Three Models Available
with Adjustable Setpoint
Ranges of 0-100 psi,
90-250 psi, and 240-600 psi
❑
Models Available with
Adjustable Differential from
2-50 psi and 10-100 psi
❑
Field-selectable Direct or
Reverse Acting Mode
❑
Interchangeable Pressure
Transducer
© 2000 Johnson Controls, Inc.
Part No. 24-7664-1903, Rev. —
Code No. LIT-930038
System 350    
Figure 1: P352AB Electronic Pressure Control
Features and Benefits
Provides the flexibility to add S352A Stage
Modules, D352 Display Module, and Y350R
Power Module
Eliminates wiring between modules and
reduces installation costs
Handles pressures required for most fan
cycling and compressor unloading
applications
Enables user to match the equipment cycle
rate and/or sequencing for a given application
Energizes relay output on either an increase
or a decrease in pressure
Increases versatility and serviceability
System 350 Product Guide
Basic Controls Section
Product/Technical Bulletin
Issue Date
www.johnsoncontrols.com
930
P352AB
0200
1