Honeywell PWTA40 Series User manual

INSTALLATION INSTRUCTIONS
31-00396-01
PWTA Series Conduit Wet
Pressure Transmitters
WARNING
This product can expose you to chemicals
including 1,3 Butadiene, which is known to the
State of California to cause cancer and
reproductive harm. For more information, go to
www.P65Warnings.ca.gov
APPLICATION
The PWTA Series wet/wet differential pressure sensors
provide reliable, accurate measurement and control of
proper applications, including the monitor and control of
pump differential pressure, chiller/boiler differential
pressure drop, and CW/HW system differential pressure.
The PWTA Series is ideal for measuring pressure across
pumps, filters, heat exchangers, compressors and other
non-corrosive wet mediaÚpplications.he PWTA Series of
pressure sensors feature three field selectable pressure
ranges, bi/uni-directional modes with configurable
output: 4-20 mA, 0-5 Vdc, or 0-10 Vdc output.
IMPORTANT
• Only qualified trade installers should install this
product
• This product is not intended for life-safety applica-
tions
• Do not install in hazardous or classified locations
• The installer is responsible for all applicable codes
• De-energize power supply prior to installation or
service
Product Application Limitation:
Honeywell products are not designed for life or safety
applications. Honeywell products are not intended for use
in critical applications such as nuclear facilities, human
implantable device or life support. Honeywell is not liable,
in whole or in part, for any claims or damages arising from
such uses.
IMPORTANT
• Do NOT exceed gauge pressure rating of sensor.
• Use ONLY Honeywell gauge pressure sensors pro-
vided with your PWTA transmitter to obtain the
specified transmitter accuracy.
• Follow instructions step by step to ensure proper
setup.
Limites de l’application du produit :
Les produits Honeywell ne sont pas conçus pour des
applications de sécurité ou de sauvetage. Les produits
Honeywell ne sont pas conçus pour les applications
critiques, comme les installations nucléaires, les
dispositifs implantables dans le corps humain ou
d'assistance vitale. Honeywell n’est pas responsable, en
tout ou en partie, des réclamations ou dommages
découlant d’une telle utilisation.
IMPORTANT
• Ne dépassez PAS la pression manométrique nomi-
nale du capteur.
• Utilisez uniquement des capteurs de pression
manométrique Honeywell fournis avec votre émet-
teur PWTA pour obtenir la précision spécifiée de
l’émetteur.
• Suivez les instructions détaillées pour assurer une
configuration adéquate.

PWTA SERIES CONDUIT WET PRESSURE TRANSMITTERS
31-00396—01 2
DIMENSIONS
CONNECTION WIRING
Honeywell recommends 22 AWG stranded, 4 conductor
shielded cable to wire between the PWTA transmitter and
pressure sensors.
Terminals are rated for 24-14 AWG, 3.5 lb-in of torque.
INSTALLATION
1. Identify PWTA sensors A & B and their respective
PSIG rating.
If the expected system gauge pressure exceeds the
PSIG rating on the PWTA sensors call factory and DO
NOT proceed with install.
PWTA40-X = 100 PSIG (50/75/100 PSID)
PWTA100-X = 100 PSIG (10/20/40 PSID)
PWTA250-X = 250 PSIG (75/150/250 PSID)
2. Plumb sensors to media. Sensor A is intended for
supply pressure and sensor B is intended for return
pressure of the system. Plumb sensors to the side or
top of pipe, as plumbing to the bottom will cause
sediment to settle and could clog or affect sensor
accuracy.
It is advisable to use a single wrap of PTFE tape on
the sensor thread sealing alternative, to improve
sensor accuracy.
No bypass valve manifold is necessary. Use only
Honeywell gauge pressure sensor elements provided with
your transmitter.
Optional shutoff valves are available
Honeywell recommends closing service valves when
flushing system to prevent contaminants and water
hammer from damaging sensing elements.
3. Mount the PWTA transmitter and run conduit (if
required) between the transmitter and the sensors.
4. Run the appropriate length cables between the
PWTA transmitter and sensors.
Honeywell recommends 22 AWG stranded, 4 con-
ductor shielded cable to wire between the PWTA
transmitter and the sensors.
5. Loosen the top screw on each sensor and remove
the terminal block for wiring as shown below:
6. Run the cable through the conduit adapter and con-
nect the wires to the sensor terminal block. Note that
the conduit terminal block is numbered and color
coded to match the terminal label colors on the
PWTA transmitter.
Reassemble the sensor conduit adapter and termi-
nal block. Place the rubber cover back on the conduit
adapter and plug the adapter onto the sensor.
Tighten the assembly screw.
DO NOT attempt to plumb or tighten the sensors
while wires are attached, as you run the risk of pull-
ing wires from cable attachments.
7. Wire sensors A & B to the PWTA Transmitter termi-
nals labeled A & B respectively. For strain relief, use
the cable clamps as shown below:
8.12in
6.12in
ø 0.89in
2.6in
ø 0.875in 1.25in
1.62in
Conduit Adapter Terminal Block Rubber Cover Pressure Sensing Element
TERMINAL COLOR
TERMINAL WIRING
1
2
3
TERMINAL NUMBER

PWTA SERIES CONDUIT WET PRESSURE TRANSMITTERS
331-00396—01
IMPORTANT
Cable shielding should ONLY be connected to the
GROUND terminal at the PWTA transmitter. DO
NOT connect cable shielding at the pressure sen-
sor.
Picture above shows the 5 wires connected prop-
erly from the sensor to the PWTA transmitter (+/-
voltage supply (terminals 1 and GROUND), +/-
feedback from transducer (terminals 2 and 3) and
shield wire (GROUND terminal).
8. Connect conduit fittings to the sensors and PWTA
transmitter. Use water tight fittings if required by
your installation conditions.
9. Wire PWTA transmitter for voltage or current output
as shown (Remote zero wiring is optional):
10. Use the following diagram for the remaining config-
uration of your PWTA system.
11. Select 20 mA, 5 V or 10 V output using OUTPUT
switch based on wiring configuration.
12. Verify the PSIG jumper matches the PSIG rating on
the sensors.
Sensor Identification:
PWTA40-X = 100 PSIG
PWTA100-X = 100 PSIG
PWTA250-X = 250 PSIG
PWTA Transmitter Jumper Configuration:
13. Select differential pressure range using RANGE
switch. Identify if your PWTA transmitter is labeled a
PWTA40, PWTA100, or PWTA250 model. Each
Transmitter provides three PSID ranges based on the
PSIG rating on sensors A and B. Use the appropriate
123 123
ELEMENT A ELEMENT B
25
100
PSI
RUN
UNI
SLOW
A-B
50
250
BAR
TEST
BI
FAST
B-A
A
B
C
4-20mA
0-5V
0-10V
123 123
Range
Output
REMOTE V OUT ZERO mA OUT
(COM)
V+ PWR
ZERO
PSID Output
ELEMENT A ELEMENT B
OUTPUT
4-20mA
0-5V
0-10V
50
250
kPa
TEST
BI
FAST
B-A
25
100
PSI
RUN
UNI
SLOW
A-B
SENSOR
PSIG []

PWTA SERIES CONDUIT WET PRESSURE TRANSMITTERS
31-00396—01 4
PSID range selection chart below based on the
transmitter label. Selected range will scale the PWTA
transmitter output.
Transmitter PSID Range Selection:
14. Inspect LCD for readings. LCD toggles between sen-
sor A reading, sensor B reading, and PSID reading.
Sensor A reading is indicated by a tick mark on the
top left of LCD. Sensor B reading is indicated by a
tick mark at the bottom left of LCD. PSID reading is
displayed without any mark at the left of the LCD.
O/R symbol will flash in bottom center of LCD if dif-
ferential pressure reading is over range. If this
occurs, select larger PSID range to avoid clipping of
readings.
15. Check remaining jumper configurations for addi-
tional setup options:
Display Units: LCD will display readings in PSI or kPa.
LCD will indicate PSI or kPa at top of screen.
Test Mode: In “Test Mode” sensor forces outputs to full-
scale for testing wiring and panel setup.
Direction Mode: PWTA transmitter can be set up in Uni or
Bi directional mode.
Response Time: In “Slow Mode” the output returns a
reading averaged over 64 samples. In ‘Fast Mode’ the
output returns the most recently calculated reading for
PSI.
Port Swap: If Sensor A was plumbed to the return (low)
side and Sensor B was plumbed to the supply (high)
side instead of re-plumbing the sensors, the Port Swap
can be utilized without a physical reconfiguration. If
this jumper is removed, transmitter is in Absolute
Mode, where values will always be reported positive.
16. To custom zero the device (optional), hold down the
zero button for 5 seconds (until the LCD blinks
once). Hold down for 10 seconds (until LCD blinks
twice) to reset/clear the zero value.
17. Seal remaining conduit knockouts on PWTA trans-
mitter.
CALIBRATION
Honeywell wet pressure sensors are factory calibrated as a
set to each PWTA transmitter.
RECYCLING
Product should not be thrown away in regular trash.
Instead, it should be recycled according to local
municipality.
RANGE
PWTA250
75 PSID
150 PSID
250 PSID
PWTA100
50 PSID
75 PSID
100 PSID
PWTA40
10 PSID
20 PSID
40 PSID
A
B
C
50
250
kPa
TEST
BI
FAST
B-A
25
100
PSI
RUN
UNI
SLOW
A-B
SENSOR
PSIG
DISPLAY UNITS
TEST MODE
DIRECTION MODE
RESPONSE TIME
PORT SWAP
[]
REMOVE FOR ABSOLUTE VALUE
Table 1. Bi-Directional Mode Example range set at 100
PSID
ABDP Output
100 0 +100 20mA/10V/5V
100 50 +50 16mA/7.5V/3.75V
50 50 0 12mA/5V/2.5V
50 100 -50 8mA/2.5V/1.25V
0 100 -100 4mA/0V/0V
RoHS Compliant

PWTA SERIES CONDUIT WET PRESSURE TRANSMITTERS
Honeywell Building Technologies
In the U.S.:
Honeywell
715 Peachtree Street NE
Atlanta, GA 30308
customer.honeywell.com
® U.S. Registered Trademark
©2020 Honeywell International Inc.
31-00396—01 M.S. Rev. 07-20
Printed in United States
TROUBLESHOOTING
SPECIFICATIONS
1One side of transformer secondary is connected to sig-
nal common. Dedicated transformer is recommended.
2For PWTA Transmitter performance accuracy, FS is
defined as the full scale of the selected range in bi-direc-
tional mode.
SPECIFICATION BY PRODUCT
Symptom Solution
No output Check wiring. Ensure power supply
meets requirements.
Pressure reading
error Verify control panel software is configured for correct output
scaling.
Verify switch and jumper settings.
Device will not zero Hold ZERO button for full 5-seconds
until LCD blinks once.
Continue holding ZERO button for
10-15 seconds, until LCD blinks
twice, to restore to factory settings.
Power supply
Voltage output (0-5V) 12-30 VDC/24 VAC1,
20 mA max.
Voltage output (0-10V)
Current (4-20 mA)
output
15-30 VDC/24 VAC
12-30 VDC, 20 mA max.
Outputs Switch selectable 2-wire 4-20 mA,
3-wire 0-5V/10V
Pressure Ranges
(Switch selectable)
PWTA40-X
PWTA100-X
PWTA250-X
10/20/40 PSID
50/75/100 PSID
75/150/250 PSID
Operating
Temperature
Transmitter 32 to 140°F (0-60°C)
Media
Compatibility
Type Water, other 17-4 SS
compatible media
Temperature -40 to 248°F (-40-120°C)
Zero adjustment Automatic
Pushbutton, terminal block
switch input
Press button for 5 seconds
to re-zero
Hold for 10 seconds to
restore to factory settings
Sensor type Micro-machined silicon
strain gauge
PWTA40
Transmitter Accuracy2Range A: +/-4% FS
Range B/C: +/- 2% FS
PWTA100/250
Transmitter Accuracy2Range A: +/-2% FS
Range B/C: +/- 1% FS
Sensor
Performance
Accuracy < +/-0.5% BFSL
Zero Offset < +/-2% FS
Span Tolerance < +/-2% FS
Stability (1 year) +/-2.5% FS, typ
Over-range protection 2x rated pressure
Burst pressure 5x or 20,000 PSI
(whichever is less)
Pressure Cycles > 100 million
Compensated Range 30 to 130°F (0-55°C)
Temperature
Compensation
Zero, < +/-1.5% of FS
Span, < +/-1.5% of FS
Shock 100G, 11 msec, 1/2 sine
Vibration 10G peak, 20 to 2000 Hz
EMI/RFI Protection Yes
Enclosure,
Transmitter
Construction Powder coated steel
Sealing IP65 (Installed with water-
tight fittings)
Enclosure, Sensor Construction Stainless Steel, 17-4, 1/4”
MNPT, 1/2” Conduit Fitting
Product Number Max PSIG Selectable PSID Range
PWTA40-X 100 PSIG 10/20/40 PSID
PWTA100-X 100 PSIG 50/75/100 PSID
PWTA250-X 250 PSIG 75/150/250 PSID