Greystone Energy Systems DWDT Series Installation Instructions Manual

MOUNTING
The transmitter installs directly into any air duct with a minimum width/diameter of 25.5 cm (10"). Select
a suitable installation area in the middle of the duct wall. To achieve the best reading, do not place in
an area where air stratification may be present. Mount the sensor at least 1.5 m (5 ' ) in either direction
from elbows, dampers, filters or other duct restrictions. Avoid areas where the transmitter is exposed to
vibrations or rapid temperature changes.
Once a suitable spot is selected, drill a 15 -20 mm (0.6" - .75" ) hole for the probe.
Slide the probe in the drilled hole until the enclosure is flush against the duct. The airflow direction is not
important. Secure the enclosure to the duct with (2) #10 x 1" (25 mm) self tapping screws (not provided).
Tighten screws until the enclosure is tight against the duct and that there is no movement of the enclosure
as shown in Figure 1.
A foam gasket is provided on the back of the enclosure that provides a tight seal against any air leaks.
The enclosure has a hinged cover with a latch. Open the cover by pulling slightly on the latch on the
right side of the enclosure and at the same time pulling on the
cover, as illustrated in Figure 2.
A 1/2" NPT threaded connection hole is provided in the bottom
of the enclosure as shown in Figure 3. Screw the EMT connector
or cable gland connector in until tight. It is recommended that
weatherproof conduit or cable gland fittings be used. The F style
enclosure includes 1/2" NPT to M16 thread adapter and cable gland
fitting.
Two security screws are provided which can be installed to
help secure the cover once settings and wiring connections are
complete. See Figure 4.
Figure 2
IN-GE-DWDTXXX-02
INTRODUCTION
The duct dewpoint transmitter is designed for use in environmental
monitoring and control systems where high performance and
stability are demanded. It's state-of-the-art design combines
digital linearization and temperature compensation with a highly
accurate and reliable thermoset polymer based capacitance
humidity sensor and curve-matched NTC thermistor temperature
sensor for reliability and accuracy in the most critical applications.
The sensors are encapsulated in a 60 micron HDPE filter at the end
of a 230 mm (9") S/S probe and a compact enclosure.
BEFORE INSTALLATION
Read these instructions carefully before installing and
commissioning the transmitter. Failure to follow these
instructions may result in product damage. Do not use in an
explosive or hazardous environment, with combustible or
flammable gases, as a safety or emergency stop device or in
any other application where failure of the product could result
in personal injury. Take electrostatic discharge precautions
during installation and do not exceed the device ratings.
Figure 3
EMT Connector
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Duct Dewpoint Transmitter
DWDT Series - Installation Instructions
Figure 1
Figure 4
Thread adapter and
cable gland fitting
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