INSTALLATION INSTRUCTIONS
62-0210-07
P7640A,B
Differential Pressure Sensors
APPLICATION
The P7640A Panel Mount and P7640B Duct Mount
Differential Pressure Sensors provide reliable, accurate
measurement and control. Proper applications include
measurement of extremely low pressure applications such
as: building/room pressure, air flow, variable air volume,
filter status, and duct pressure. They are ideal for clean
rooms, hospitals, fume hoods, and computer rooms.
The P7640 Pressure Sensors are designed with field-
selectable 4-20 mA, 0-5 Vdc, or 0-10 Vdc output. The four
pressure ranges fall between 0–1 in. w.c./0–250 Pa or 0–
10 in. w.c./0–2500 Pa, depending on the model.
Accessory
32003169-001 Duct Pressure Pick-up Probe, 4 in.
INSTALLATION
When Installing this Product...
1.
Read these instructions carefully. Failure to follow
them could damage the product or cause a hazard-
ous condition.
2.
Check ratings given in instructions and on the
product to ensure the product is suitable for your
application.
3.
Installer must be a trained, experienced service
technician.
4.
After installation is complete, check out product
operation as provided in these instructions.
IMPORTANT
All wiring must agree with applicable codes,
ordinances and regulations.
Mounting
Screw holes are accessed inside the enclosure (with the
cover removed) and are located in the upper left and
lower right corners.
Panel Mount
Run tubing from one (static) or both (differential) barb
fittings, making sure the typically higher pressure source
is connected to the port labeled HI, and the typically
lower pressure source is connected to the port labeled
LO.
Duct Mount
The units with the integral probe should typically be
mounted at the high pressure location when used for
differential control.
CONFIGURATION
Select the proper output, mode, and pressure range
using the switches and jumpers:
1.
Select output using the output switch:
a. Current: mA (then skip to step 3), or
b. Voltage: Volt.
2.
Select 0-10 Vdc or 0-5 Vdc using jumper J4.
3.
Select bi- or uni-directional mode using jumper J5.
NOTE: Setting for 0 to 1 in. w.c. and bi-directional
will give output from -1.0 to 1.0 in. w.c.
4.
Select inches w.c. or Pascal scale using jumper J7.
5.
Select fast or standard response time using jumper
J8.
6.
Select appropriate full-scale pressure range using
the rotary switch. Align arrow (not the slot) to the
desired range. See Table 2 for the range selection
guide.
NOTE: Note that either the 1 in. w.c. or 10 in. w.c.
scale is marked. This is the available
scale for that given model. When the
range is changed, the LCD models
momentarily indicate selected range.
7.
Set output according to Table 1.
Table 1. Controller Compatibility
and Output Settings.
Controller
Required Sensor
Output Setting
L
ON
S
PEC
™
Setting
W7750, W7760, W7761
4-20 mA
FilterPress or
P7610B
W7750B, W7760C,
W7753, W7760
0-10 Vdc (default)
FilterPress or
P7610F, or voltage
Non-Honeywell
0-5 Vdc
n/a