| Вид документа | Бюлетень виробу |
|---|---|
| Виробник | JCI |
| Код документа | system-350p352-electronic-pressure-control |
| Група обладнання | P352P Pressure Control with Analog Output |
| Сторінок | 12 |
| Мова документа | англійська |
| Розмір файлу | 0.1 МБ |
Текст документа
System 350 Product Guide 930
Basic Controls Section
Product/Technical Bulletin P352
Issue Date 0714
System 350
P352 Electronic Pressure Control
The P352 Series is an on/off electronic pressure
control with single-pole, double-throw relay output
and LED indication. The P352 Series is designed
with reverse or direct acting mode of operation,
adjustable differential, and an interchangeable
pressure transducer. The P352 will accept up to
five S352 Stage Modules to control a total of six
stages of HVAC and/or refrigeration equipment.
Like all System 350 products, the P352 is housed
in a NEMA 1 high-impact plastic enclosure. The
modular design provides easy, snap-together
connections for quick installation and future
expandability.
Figure 1: P352 Electronic Pressure Control
Features and Benefits
Modular Design Provides the flexibility to add up to five S352 Stage Modules, a D352
Display Module and a Y350R Power Module
Plug-in Connectors and 35 mm Eliminates wiring between modules and reduces installation costs
DIN-rail Mountability
Adjustable Setpoint Range of 90 Handles pressures required for most fan cycling and compressor unloading
to 250 PSIG applications
Differential Adjustable from 10 to Enables user to match the equipment cycle rate and/or sequencing for a
100 PSI given application
Field-Selectable Reverse or Direct Energizes relay output on either an increase or decrease in pressures
Acting Mode Jumpers
Interchangeable Pressure Increases versatility and serviceability
Transducer
© 2014 Johnson Controls, Inc. 1
Part No. 24-7664-52, R e v . B
Code No. LIT-930040
Application Overview Operation
The P352 Pressure Control can be used as a
standalone device or in conjunction with IMPORTANT: Use the System 350 controls
System 350 plug-in accessory modules to only as operating controls. Where failure or
control a variety of single- or multiple-stage malfunction of the System 350 controls could
HVAC and refrigeration pressure control lead to personal injury or property damage to
applications. The P352 setpoint range is from the controlled equipment or other property,
90 to 250 PSIG. Typical applications include: additional precautions must be designed into the
control system. Incorporate and maintain other
• condenser fan cycling devices, such as supervisory or alarm systems
or safety or limit controls, intended to warn of or
• compressor unloading
protect against failure or malfunction of the
• high pressure alarm System 350 controls.
Typically, a System 350 pressure control IMPORTANT: Utiliser ce System 350 controls
scheme would include the following: uniquement en tant que dispositif de contrôle de
• P352 Pressure Control fonctionnement. Lorsqu'une défaillance ou un
dysfonctionnement du System 350 controls
• S352 Stage Modules risque de provoquer des blessures ou
d'endommager l'équipement contrôlé ou un
• D352 Digital Pressure Sensor/Setpoint autre équipement, la conception du système de
Display Module contrôle doit intégrer des dispositifs de
protection supplémentaires. Veiller dans ce cas
• Y350R Power Module (or 24 VAC
à intégrer de façon permanente d'autres
transformer)
dispositifs, tels que des systèmes de
• P99 Series Pressure Transducer supervision ou d'alarme, ou des dispositifs de
sécurité ou de limitation, ayant une fonction
d'avertissement ou de protection en cas de
défaillance ou de dysfonctionnement du System
350 controls.
The P352 Pressure Control operates on 24 VAC
and supplies a SPDT relay output. A front-panel
“ON” LED lights to indicate the relay is
energized. Adjustable features include:
• setpoint
• differential
• reverse/direct acting mode
Setpoint Adjustment
Setpoint is defined as the pressure at which the
relay will de-energize. The setpoint can be
adjusted from 90 to 250 PSIG. Adjustment is
made using the concealed setpoint adjustment
dial located under the cover in the center of the
printed circuit board (see Figure 5).
2 Basic Controls—P352 Electronic Pressure Control
Differential Adjustment
Differential is defined as the change in I nstallation and Wiring
transducer pressure between energization and The P352 Electronic Pressure Control is housed
denergization of the relay. The differential can in a compact NEMA 1 plastic enclosure
be adjusted from 10 to 100 PSI. Adjustment is designed for standard 35 mm DIN-rail mounting.
made using the potentiometer marked “DIFF Four key-slot mounting holes on the back of the
ADJUST” located on the printed circuit board control case are provided should surface
below and to the right of the setpoint dial (see mounting be required.
Figure 5).
Note: When mounting the P352 (or any
System 350 Module) to rigid conduit,
Reverse/Direct Action Mode attach the hub to the conduit before
securing the hub to the control
With the reverse action (RA) mode selected,
enclosure.
the differential is below the setpoint. The relay
will de-energize as the pressure rises to the
setpoint. As the pressure drops to the setpoint
minus the differential, the relay will energize and ! WARNING: Risk of Electric Shock.
the LED will illuminate. Disconnect the power supply before
making electrical connections. Contact
With the direct action (DA) mode selected, the with components carrying hazardous
differential is above the setpoint. The relay will voltage can cause electric shock and
de-energize as the pressure drops to the may result in severe personal injury or
setpoint. As the pressure rises to the setpoint death.
plus the differential, the relay will energize and
the LED will illuminate. AVERTISSEMENT : Risque de
décharge électrique.
The direct/reverse action mode is selected via Débrancher l'alimentation avant de
jumper blocks marked “RA/DA” located on the réaliser tout branchement électrique.
right side of the circuit board above the relay Tout contact avec des composants
(see Figure 5). As shipped from the factory, the conducteurs de tensions dangereuses
RA/DA jumper blocks are installed in the risque d'entraîner une décharge
horizontal (direct action) position. électrique et de provoquer des
D imensions
0.145 Mounting Slot
blessures graves, voire mortelles.
3.68 For #6 Screws • All wiring must be installed to conform to the
National Electrical Code and local
regulations. For maximum electrical rating of
2.94 5.00 control see label inside control cover. Use
P352
75 127 ON copper conductors only.
• Consult the typical wiring diagrams
(Figures 3 and 4) for proper wiring and
terminal designations.
1.56 0.42 DIN Rail 2.40
40 11 Mount 1.20 61
31
P352 Transducer Wiring
The P352 Pressure Control is used with the
2.40
61 P99 Series Active Pressure Transducer, which
is powered by the 14 VDC power supply of the
0.85 P352. The transducer is connected at the four-
0.875 Conduit
22 22 Hole
conductor screw terminal block located at the
upper left of the circuit board. (See Figure 5 and
Figure 2: P352 Dimensions in./mm Table 1.)
Basic Controls—P352 Electronic Pressure Control 3
Shielded cable is not generally required for Table 1: Pressure Transducer
transducer wiring on runs of less than 50 feet. Connections
When using shielded cable, isolate and tape the
shield at the transducer. Connect the shield to P352 P99
the COM terminal on the P352. Terminal Wire
Designations Color
A maximum shielded cable length of 1000 feet is
recommended using 14 to 22 AWG wire. COM (A) Green
SEN (B) White
VDC (C) Brown
Transducer
White-SEN
Brown-VDC
Green-COM
P352 S352 D352
24
VAC
L
1
L
2
Load Load
Figure 3: System 350 Powered by an External Transformer With the P99 Transmitter
Located Less Than 50 Feet From the P352
4 Basic Controls—P352 Electronic Pressure Control
Transducer
White-SEN
Brown-VDC
Green-COM
Isolate and
Shield (Connect Tape
to COM at P352)
P352 Y350R S352 S352 S352 D352
L
1
L
2
Load Load Load Load
Figure 4: System 350 Powered by Y350R Power Module With P99 Transmitter
Between 50 and 1000 Feet From the P352
Y350R Power Module
A dd-On Modules The Y350R Power Module provides a
The S352 Stage, D352 Digital Pressure Display, convenient method of powering System 350
and Y350R Power Modules snap together and modules from a 120 or 240 VAC power source.
plug into the P352 Electronic Pressure Control The Y350R supplies a rectified 24 VAC to the
via connectors on the both sides of each add-on modules.
module. The Y350R can be plugged into the right side of
the P352 Control or any of the add-on modules.
S352 Pressure Stage Modules The Y350R is capable of providing power to a
The S352 Stage Modules receive their power, P352, a D352 Display Module, and up to five
setpoint, and sensor input from the P352 S352 Stage Modules.
Control. As many as five S352 Stage Modules
can plug into the P352 Control. IMPORTANT: Verify that the jumpers are in
the proper position before powering the System
D352 Digital Pressure Display Module 350 components. If the jumpers on the System
The D352 Display Module receives its power, 350 components are in the wrong position, the
sensor, and setpoint information from the P352. device will activate the relay in response to the
A three-digit liquid crystal display (LCD) gives a opposite signal. The relay may remain
continuous readout of the sensed pressure. energized until the jumper position is corrected.
When the "PRESS FOR SETPOINT" button is
depressed the setpoint of the adjoining P352 is
displayed.
Basic Controls—P352 Electronic Pressure Control 5
S352
A djustments
1. Remove the S352 cover by loosening the
P352 four captive cover screws.
1. Remove the P352 cover by loosening the 2. Set the reverse/direct action (RA/DA)
four captive cover screws. jumper blocks to the desired mode of
2. Set the reverse/direct action (RA/DA) operation. (See Figure 6.)
jumper blocks to the desired mode of 3. Adjust the differential potentiometer to the
operation. Position the jumper blocks desired setting. (Refer to the typical
vertically for reverse action or horizontally multistage application in Figure 7.)
for direct action. (See Figure 5.)
4. Adjust the offset potentiometer to the
3. Adjust the differential potentiometer to the desired pressure from the P352 setpoint
desired setting. Clockwise rotation (above setpoint with direct action mode
increases the differential. selected or below setpoint with reverse
4. Turn the setpoint adjustment dial to the action mode selected) at which the stage
desired setpoint. relay will
de-energize.
5. Replace the cover and tighten the captive
cover screws. 5. Replace the cover on the S352.
Note: Use the D352 Pressure Display Module
for the most accurate setpoint selection. S352 Stage Module
Offset Differential
Potentiometer Potentiometer
Module
Connector
P352 Pressure Module
Connector Jumper Block
Control Module
Position
24V
COM Concealed Setpoint Relay Energized Reverse Action
VDC
Adjustment Dial LED Indicator Relay Direct Action
SEN Module
Connector
Jumper Block
Differential Position
Potentiometer N.C. COM N.O.
Reverse Action
Relay Energized Relay Output Terminals
LED Indicator Relay Direct Action
Figure 6: S352 Stage Module Adjustment
Potentiometer Locations and Board Layout
N.C. COM N.O.
Relay Output Terminals
Figure 5: P352 Electronic Pressure Control Adjustment
Potentiometer Locations and Board Layout
6 Basic Controls—P352 Electronic Pressure Control
Figure 7: Typical Reverse Action/Direct Action Application
Using One P352 and Three S352s
C
- If an external transformer is used,
heckout Procedure select AC volts on the DVM and verify
that the voltage is between 20 and
Before applying power, make sure installation 30 VAC.
and wiring connections are according to job
specifications. After necessary adjustments and - If a Y350R Power Module is used,
electrical connections have been made, put the select DC volts on the DVM and verify
system in operation and observe at least three that the voltage is between 16 and
complete operating cycles before leaving the 38 VDC.
installation. b) If the DVM reading is within the
indicated voltage range, proceed to Step
2.
T roubleshooting c) If the DVM reading is NOT within the
indicated voltage range, check wiring
If the control system does not function properly, then replace the Y350R or the external
verify that the proper mode is selected on each transformer.
module (e.g. reverse action/direct action) and
then use the following procedures to determine Table 2: P352 Control Relay Troubleshooting
the cause of the problem:
Action LED N.O. Relay Setpoint Dial
1. Check for proper voltage applied to the Status Setting
control module.
Reverse ON Closed (PSIGT) + differential
a) Connect a digital voltmeter (DVM) Reverse OFF Open (PSIGT)
between the “24V” (+) and “COM” (-)
Direct ON Closed (PSIGT) - differential
terminals located on the control's left-
side terminal block (Figure 2). Direct OFF Open (PSIGT)
Basic Controls—P352 Electronic Pressure Control 7
2. Check pressure transducer for proper d) If the relays still do NOT turn on and off,
output voltage. replace the defective stage module(s).
a) Disconnect the transducer “OUT” wire Note: There is the unlikely possibility that
from the P352 “SEN” terminal. a defect in one stage module could
cause defective symptoms in all
b) Connect a DC voltmeter between the
modules. Plug each stage into the
transducer “OUT” wire and the control
control individually and check its
“COM” terminal. Measure voltage.
performance as outlined in Steps 3a
Note: A transducer output of 0 to 10 VDC and 3b.
should correspond to a pressure of 0 to
5. Check the display module for proper
435 PSIG.
operation.
- If the voltage conversion to pressure
If there is no display module in the system,
is close to the expected PSIG at the
skip this step.
transducer (PSIGT), proceed to
Step 3. Note: Steps 1 through 4 must be performed
first.
- If the voltage conversion to pressure
is not what was expected, replace a) Check pressure at the transducer
the transducer. (PSIGT) as determined in Step 2a. The
display should read the same value.
3. Check the control for proper operation.
b) If the display module does NOT read the
Note: Steps 1 and 2 must be performed first.
correct transmitter pressure (PSIGT),
a) Adjust the setpoint dial to at least replace the display module.
100 PSIG below the pressure expected
c) Pressing the button on the display
at the transducer (PSIGT) as determined
module should cause the display to read
in Step 2.
the selected setpoint.
b) Increase the setpoint by slowly adjusting
d) If pressing the SETPOINT button results
the dial until the control relay and LED
in an out-of-range reading (greater than
turn ON and OFF as shown in Table 2.
435 PSIG) replace the display module.
c) If the relay performs as expected,
e) If pressing the SETPOINT button results
continue to Step 4.
in a reading other than the expected
d) If the relay does NOT perform as setpoint value, check the setpoint
indicated in Table 2, replace the control. potentiometer setting and correct if
4. Check the stage modules for proper necessary. If the display continues to
operation. read an incorrect value, replace the
display module.
If this is a single-stage system, skip to
Step 5. Note: If the control and add-on modules all
appear to be operating properly, but the
Note: Steps 1, 2 and 3 must be performed field device still does not turn on and off
first. as expected, check the wiring from the
a) Turn the setpoint dial on the control to control or stage module to the field
the 90 PSIG setting. device.
b) Increase the setpoint by slowly adjusting
the dial until the stage relays and LEDs
turn ON and OFF as shown in Table 3.
c) If the relays do NOT perform as
indicated in Table 4, adjust the
differential and offset potentiometers to
their minimum values and try again.
8 Basic Controls—P352 Electronic Pressure Control
Table 3: S352 Stage Relay Troubleshooting
Action LED N.O. Relay Status Setpoint Dial Setting
Reverse (RA) ON Closed (PSIGT) + offset + differential
Reverse (RA) OFF Open (PSIGT) + offset
Direct (DA) ON Closed (PSIGT) - offset - differential
Direct (DA) OFF Open (PSIGT) - offset
R epairs and Replacement
Field repairs or calibration must not be made. and wholesale distributors.
Transmitters and replacement controls are
available through local Johnson Controls branch
O rdering Information
Table 4: Ordering Information
Item Product Code Number Description
Electronic Pressure Control P352AA-1C With SPDT Relay and 90 to 250 PSIG Range
Pressure Transducer P99V-2C 0 to 435 PSIG; 1/4 in. SAE Flare Connector
Display Module D352AA-1C Digital Pressure Display Module
Stage Module S352AA-1C Pressure Stage Module with PSIG Scale
Power Module Y350R-1C Rectified 24 VAC from 120/240 VAC Source
DIN Rail Sections BKT287-1R 35 x 7.5 mm, 0.305 m (12 in.) long
BKT287-2R 35 x 7.5 mm, 0.914 m (36 in.) long
DIN Rail End Clamps PLT344-1R Consists of Two End Clamps
Cable for Remote Mounting WHA29A-600R 3 ft (0.9 m)*
of D352 Display Module WHA29A-603R 25 ft (7.6 m)
WHA29A-604R 50 ft (15.2 m)
* WHA29A-600R can also be used to daisy chain S352 Stage Modules together.
Basic Controls—P352 Electronic Pressure Control 9
Notes
10 Basic Controls—P352 Electronic Pressure Control
Notes
Basic Controls—P352 Electronic Pressure Control 11
S pecifications
Product P352 Electronic Pressure Control
Differential Range 10 to 100 PSI
Pressure Setpoint Range 90 to 250 PSIG
DC Power Supply 14 VDC Provided to Power the Pressure Transmitter
Input Voltage* 24 VAC Class 2; 50/60 Hz +15%, -10%
Relay SPDT Enclosed Relay; Contacts Rated at 10 Amp Non-inductive, 1/2 hp 120/240 VAC
Current Draw 1.8 VA
Input Signal 0 to 10 VDC Corresponding to 0 to 435 PSIG
Electrical Ratings Full Load Amps: 9.8 (120 VAC) 4.9 (208/240 VAC)
Locked Rotor Amps: 58.8 (120 VAC) 29.4 (208/240 VAC)
Non-Inductive Amps: 10 at 24/240 VAC
Pilot Duty: 125 VA at 24/240 VAC
Ambient Temperature Operating : -30 to 150°F (-34 to 66°C)
Shipping: 40 to 185°F (-40 to 85°C)
Ambient Humidity 0 to 95% RH Non-Condensing
Material Case, Cover: NEMA 1 High Impact Noryl Plastic
Agency Listing UL Guide No. XAPX, File E27734
CSA Class No. 4813 02, File LR948
*Only one input voltage source may be used.
Noryl is a registered trademark of the General Electric Company.
Add-on Modules:
S352 Input Voltage: 14 VDC Reference Provided by the P352; 24 VAC Power Supply
Relay Contacts: SPDT, 10 amps Non-inductive, 1/2 hp 120/240 VAC
DIFF & OFFSET: 10 to 100 PSI Differential; 10 to 60 PSIG Offset
Y350R Input Voltage: 120/240 VAC, 50/60 Hz
Output Power: 24 VAC Rectified, 10 VA Maximum
D350 Display Range: 90 to 250 PSIG
The performance specifications are nominal and conform to acceptable industry standards. For application 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.
Controls Group FAN 930
507 E. Michigan Street System 350 Product Guide
P.O. Box 423 Printed in U.S.A.
Milwaukee, WI 53201
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