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Sure-Aire™ Flow Monitoring System
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Document 1021624
Sure-Aire™ Electronics
User and Service Manual
Installation, Operation and Maintenance Manual
Please read and save these instructions for future reference. Read carefully before attempting to assemble, install,
operate or maintain the product described. Protect yourself and others by observing all safety information. Failure
to comply with these instructions will result in voiding of the product warranty and may result in personal injury
and/or property damage.
Sure-Aire™ Electronics Features:
• NEMA-4 / IP56 enclosure rating
• Factory calibrated
• 24 VDC / 24 VAC or 100-240 VAC 50 / 60 Hz input
voltage
• Part numbers and pressure ranges:
386719 – 0-4.15 in. wg
386720 – 0-8.30 in. wg
386721 – 0-22.14 in. wg
386722 – 0-41.52 in. wg
386723 – 0-83.14 in. wg
386724 – 0-138.40 in. wg
• Isolated output transmitter linear to differential
pressure or volume
4-20 mA
2-10 VDC
• Communication protocols
BACnet MSTP
Modbus
• LCD display with user-friendly touch panel interface
• Temperature compensation for air density
• Remote duct temperature sensor
• Programmable elevation
• English or metric readings
Hardware Required:
• Four (4) #8-32 screws
• 1/4-inch nylon tubing (length dependent on
distance between fan and Sure-Aire electronics,
maximum 75 feet
(23 m)
each line)
• Sensor wiring for temperature sensor (if
temperature sensor is being used)
Pressure ranges reflect differential pressures between
the fan inlet and inlet cone, not system static pressure.
Flow Accuracy
+/- 3.0% of actual flow
Transducer in Electronics:
• Ac/- 0.5% of full scale at 77ºF (
25ºC
)
• Pressure limit: 70 psi (1938 in. wg)
• Thermal effects: 0.015%/°F (
0.027%/°C
) from -13°
thru 185°F (
25° thru 85°C
)
WARNING
Improper installation, adjustment, alterations,
service or maintenance may cause injury and / or
property damage, as well as possibly void the
factory warranty. No person may install, operate,
or maintain a Sure-Aire™ electronics without first
being fully trained and qualified in the installation,
operation and maintenance, and carefully reading and
understanding the contents of this manual. If you have
any questions about these instructions, contact your
local representative.
CAUTION
Risk of electrical shock! More than one disconnect
switch may be required to de-energize the equipment
before servicing.
