Honeywell PW Series User manual

INSTALLATION INSTRUCTIONS
PW 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 PWTB Series wet/wet differential pressure sensors
provide reliable, accurate measurement and control of proper
applications, including monitoring and controlling pump
differential pressure, chiller/boiler differential pressure drop,
and CW/HW system differential pressure. The PWTB Series is
ideal for measuring pressure across pumps, filters, heat
exchangers, compressors, and other non-corrosive wet media
applications. The PWTB 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
applications.
• Do not install in hazardous or classified locations.
• The installer is responsible for all applicable codes.
• De-energize power supply before installation or
service.
Product Application Limitation:
Honeywell products are not designed for life or safety
applications. Honeywell products are not intended for critical
applications such as nuclear facilities, human implantable
devices, 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 the gauge pressure rating of the
sensor.
• Use ONLY Honeywell gauge pressure sensors
provided with your PWTB 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 nominale
du capteur.
• Utilisez uniquement des capteurs de pression
manométrique Honeywell fournis avec votre émetteur
PWTB pour obtenir la précision spécifiée de l’émetteur.
• Suivez les instructions détaillées pour assurer une
configuration adéquate.

PW SERIES CONDUIT WET PRESSURE TRANSMITTERS
31-00539-01 2
DIMENSIONS
Figure 1. Housing Dimensions
CONNECTION WIRING
Honeywell recommends 22 AWG stranded, and four
conductor shielded cable to wire between the PWTB
transmitter and pressure sensors.
Terminals are rated for 24-14 AWG, 3.5 lb-in of torque.
INSTALLATION
1. Identify PWC sensors A & B and their respective PSIG
rating.
If the expected system gauge pressure exceeds the PSIG
rating on the PWTB sensors, DO NOT proceed with the
installation.
PWTB50-X = 50 PSIG
PWTB100-X = 100 PSIG
PWTB250-X = 250 PSIG
2. Plumb sensors to media. Sensor A is intended for supply
pressure, and sensor B is intended for the return
pressure of the system. Plumb sensors to the side or top
of the pipe, as plumbing to the bottom, will cause
sediment to settle and could clog or affect sensor
accuracy. To provide leak-free sealing without excessive
torque, it is advisable to use a single wrap of PTFE tape
on the sensors threads or non hardening thread sealant.
(Make sure thread sealant does not coat the end of the
sensor).
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
the system to prevent contaminants and water hammer
damaging to sensing elements.
3. Mount the PWTB transmitter and run a conduit (if
required) between the transmitter and the sensors.
4. Run the appropriate length cables between the PWTB
transmitter and sensors.
Honeywell recommends 22 AWG stranded, and four
conductor shielded cable to wire between the PWTB
transmitter and the sensors.
5. Loosen the top screw on each sensor and remove the
terminal block for wiring as shown below:
Figure 2. PWTB Pressure Sensor Assembly (no cable)
6. Run the cable through the conduit adapter and connect
the wires to the terminal block. Note that the conduit
terminal block is numbered and color-coded to match
the terminal label colors on the PWTB transmitter.
IMPORTANT
DO NOT connect the shield at the sensor element end.
The shielding should only be connected to the ground
terminal at the PWTB transmitter end.
Figure 3. PWTB Sensor Terminal Wiring
7. Reassemble the conduit adapter and terminal block.
Place the rubber cover back on the conduit adapter and
plug the adapter onto the sensor. Tighten the assembly
screw.

PW SERIES CONDUIT WET PRESSURE TRANSMITTERS
3 31-00539-01
IMPORTANT
DO NOT attempt to plumb or tighten the sensors while wires
are attached, as you risk pulling wires from cable attachments.
8. Wire sensors A & B to the PWTB Transmitter terminals
labeled A & B respectively. See the table in point 6 if
wiring a pre-ordered cable length for color coordination.
For strain relief, tighten cable glands.
Figure 4. PWTB Transmitter Terminals
IMPORTANT
Cable shielding should be connected to the Shield
terminal at the PWTB transmitter and left
unconnected at the sensor element end.
9. Connect conduit fittings to the sensors and PWTB
transmitter. Use water-tight fittings if required by your
installation conditions.
10. Wire PWTB transmitter for voltage or current output as
shown (Remote zero wiring is optional):
Figure 5. Transmitter Output/Remote Zero Wiring
11. Select 20 mA, 5 V, or 10 V output using the OUTPUT
switch based on wiring configuration.
12. Configure output range and sensor PSIG using DIP
switches 1-7. DIP 1-3 set the sensor PSIG corresponding
to the PWTB ordered. DIP 4-7 are used to set the desired
output signal range. Both use the binary code system
outlined in the table.
13. Inspect the LCD for readings. The LCD toggles between
sensor A, sensor B, and PSID reading.
• A dash mark at the top left of the LCD indicates the
reading of sensor A.
• A dash mark at the bottom left of the LCD indicates
the reading of sensor B.
• PSID reading is displayed without any mark at the
left of the LCD.
14. O/R symbol will flash in the bottom center of the LCD if
the differential pressure reading is over range. Select a
larger PSID range to avoid clipping of readings if this
occurs.
SENSOR A
SENSOR B
PWR
S1
GND
PWR
S2
GND
PWR
RTN
V
ZERO
ZERO
OUTPUT
4-20mA
0-5V
0-10V
Table 1. PWB Transmitter DIP Switch Configuration
DIP Function DOWN UP
1 SENSOR2 0 (off) 1 (on)
2 SENSOR1 0 1
3 SENSOR0 0 1
4 RANGE3 0 1
5 RANGE2 0 1
6 RANGE1 0 1
7 RANGE0 0 1
8 Units KPA PSI
9 UNI/BI BI UNI
10 MODE FAST SLOW
11 SWAP B-A A-B
12 ABS ABS +/-
DIP Binary Sensor (PSIG) Sensor (kPa)
1-3
000 Test Test
011 50 345
100 100 689
110 250 1724
DIP Binary Range (PSIG) Range (kPa)
4-7
0011 0-10 0-69
0100 0-15 0-103
0101 0-20 0-138
0110 0-25 0-172
0111 0-30 0-207
1000 0-40 0-276
1001 0-50 0-345
1010 0-75 0-517
1011 0-100 0-689
1100 0-125 0-862
1101 0-150 0-1034
1110 0-250 0-1724

PW SERIES CONDUIT WET PRESSURE TRANSMITTERS
31-00539-01 4
15. Check remaining DIP switch (8-12) configurations for
additional setup options:
Display Units: LCD will display readings in PSI or kPa. LCD
will indicate PSI or kPa at the top of the screen.
UNI/BI: PWTB transmitter can be set up in Uni or Bi-direc-
tional mode.
Fig. 6. Bi-Directional Mode Example range set at 100 PSID
Mode: 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.
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.
ABS: In Absolute Mode, 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 the LCD blinks twice) to
reset/clear the zero value.
CALIBRATION
Honeywell wet pressure sensors are factory calibrated as a set
to each PWTB transmitter.
RECYCLING
The product should not be thrown away in the regular trash.
Instead, it should be recycled according to the local
municipality.
TROUBLESHOOTING
A B DP 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
Table 2. Troubleshooting Solutions
Symptom Solution
No output Check the wiring. Ensure power supply meets requirements.
Pressure reading
error
Verify that control panel software is configured for correct output scaling.
Verify switch and jumper settings.
The device will not
zero
Hold the ZERO button for full 5-seconds until the LCD blinks once.
Continue holding the ZERO button for 10-15 seconds until the LCD blinks twice to restore to factory
settings.
Table 3. PWTB Sensor Models
Model Max. Sensor Pressure Cable Type / Length
PWTB50-X
50 PSIG
345 kPa
Installer provided*
PWTB50-PC-9 Plenum - 9 feet
PWTB50-AC-9 Armor - 9 feet
PWTB100-X
100 PSIG
689 kPa
Installer provided*
PWTB100-PC-9 Plenum - 9 feet
PWTB100-AC-9 Armor - 9 feet
PWTB250-X
250 PSIG
1724 kPa
Installer provided*
PWTB250-PC-9 Plenum - 9 feet
PWTB250-AC-9 Armor - 9 feet

PW SERIES CONDUIT WET PRESSURE TRANSMITTERS
® U.S. Registered Trademark
©2022 Honeywell International Inc.
31-00539-01I Rev. 05-22
The material in this document is for information purposes only. The content and the product described are subject to change without notice.
Honeywell makes no representations or warranties with respect to this document. In no event shall Honeywell be liable for technical or editorial
omissions or mistakes in this document, nor shall it be liable for any damages, direct or incidental, arising out of or related to the use of this
document. No part of this document may be reproduced in any form or by any means without prior written permission from Honeywell.
Honeywell Building Technologies
715 Peachtree St NE
Atlanta, Georgia 30308
customer.honeywell.com
buildings.honeywell.com
SPECIFICATIONS
1 One side of transformer secondary is connected to signal common. A dedicated transformer is recommended.
2 Because of lower accuracy, it is not factory recommended to use an output range less than 10% of the total sensor PSIG.
Table 4. Specification Details
Power supply
Voltage output (0-5V) 12-30 VDC/24 VAC(1), 20 mA max.
Voltage mode (0-10v) 13-30 VDC/24 VAC required for 10V FS output
Current mode (4-20mA) 15-30VDC(0 ohm)/16-30VDC (250 Ohm) / 18-30VDC (500 Ohm),
20mA max
Outputs Switch selectable 2-wire 4-20 mA, 3-wire 0-5V/10V
Operating Temperature Transmitter -22 to 158 °F (-30 to 70 °C)
Media Compatibility Type Water, other 316 SS compatible media (316L diaphragm)
Temperature 32 to 250 °F (0 to 125 °C)
Zero adjustment Automatic
Pushbutton, Remote zero
Press the button for 5 seconds to re-zero
Hold for 10 seconds to restore factory settings
Sensor type Micro-machined silicon strain gauge
PWTB Transmitter
Accuracy(2) Range
according to PSID table in
PWTB Transmitter DIP
Switch Configuration table
Sensor 1% Accurate ranges
PWTB50 20/25/30/40/50 PSID
138/172/207/276/345 kPa
PWTB100 40/50/75/100 PSID
276/345/517/689 kPa
PWTB250 75/100/125/150/250 PSID
517/689/862/1034/1724 kPa
2% Accurate ranges
PWTB50 10/15 PSID
69/103 kPa
PWTB100 15/20/25/30 PSID
103/138/172/207 kPa
PWTB250 30/40/50 PSID
207/276/345 kPa
Sensor Performance
Accuracy < +/-0.25% BFSL
Stability (1 year) +/-0.2% FS, typ
Over-range protection 200 % rated pressure
Pressure Cycles > 100 million
Compensated Range 14 to 158 °F (-10 to 70°C)
Temperature
Compensation %FS/C
Zero, <±0.03 (<100 kPa), <±0.02(>100 kPa)
Span, <±0.03 (<100 kPa), <± 0.02(>100 kPa)
Vibration 10G peak, 20 to 2000 Hz
Enclosure, PWTB Construction PC/ABS
Rating NEMA 4X
Enclosure, Sensor Construction Stainless Steel, 304, 1/4” MNPT, PG9 Conduit Fitting