Greystone Energy Systems HTDT Series Installation Instructions

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. 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. Screw the
EMT or cable gland connector in until tight. See Figure 3. It is recommended that weatherproof
EMT or cable gland fittings be used. The E style enclosure includes 1/2" NPT to M16 thread
adapter and cable gland fitting.
Make wire connections as per the "Wiring" illustrations on Page 2.
Swing door closed until securely latched. For added security, 2 screws are provided that may
be installed in the integrated screw tabs. See Figure 4.
Figure 2
IN-GE-HTDTXXX-02
Figure 3
EMT Connector
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Temperature Transmitter
HTDT Series - Installation Instructions
INTRODUCTION
The duct humidity/temperature transmitter series uses a highly accurate
and reliable Thermoset Polymer based capacitance humidity sensor and
Platinum RTD temperature sensor together with state-of-the-art digital
linearization and temperature compensated circuitry to monitor humidity
levels in a duct. 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
humidity/temperature 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.
Thread adapter and
cable gland fitting
Duct Humidity/
Figure 1
Figure 4
Page 1