511391
201T User Manual
15
2/07
Honeywell
Duct-type Installation
Duct-type Installation
The 201T can be duct-mounted. It is most efficient when air speed is
between 500 and 4,000 ft/minute (2.5 to 20.3 m/sec), and can be
installed either for fresh air or exhaust monitoring. Make sure to verify
all the requirements and existing regulations that may affect the choice
of its location. We recommend installation on a straight duct 3 feet (1 m)
away from any curve.
1.
Post the drilling guide
to the ventilation duct.
2.
Drill the openings for
the sampling tubes.
3.
Insert the sampling
tube with lateral air
holes in the
appropriate connector,
orienting the air holes
facing airflow. Tighten
with the (8-32
5
/
16
”)
screw on the
connector.
4.
Insert the exhaust tube
into the appropriate
connector, orienting
the slant away from airflow. Tighten with the (8-32
5
/
16
”) screw on
the connector.
5.
For a ventilation duct longer than 20 inches (51 cm), extra tubing is
necessary. It is preferable to drill a hole at the opposite side facing
the detection unit to support the far end of the tube. Seal the end of
the tube with the cork supplied. If necessary, seal the openings on
the duct around the tubings.
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