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PW SERIES CONDUIT WET PRESSURE TRANSMITTERS
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).
31-00539-01
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.
2
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