Greystone Energy Systems NTDAMOD Installation Instructions Manual

Mounting

The sensor 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 strati cation may be
present. Mount the sensor at least 1.5 m (5 ' ) in either direction from elbows, dampers, lters 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 ush against the duct. The air ow 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 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.
Using a Phillips screwdriver, remove the (2) cover screws, as shown in
Figure 2. Remove cover and set aside with screws for re-installing after
Wiring and set up.
Two 21 mm (0.8125") holes are provided for connection of either
12.77mm (0.5" ) EMT or a cable gland style connector as shown in Figure 3.
Insert the EMT or cable gland connector through the hole and securely
fasten using a locknut. If only one connection hole is required, use the
included hole plug to cap o the unused one as shown in Figure 4.
Special care must be taken not to damage any internal components
during installation.
Make wire connections as per the "Wiring" illustrations on Page 2.
Once wiring and set up are complete, re-install cover and tighten the (2)
screws using a Phillips screwdriver.
Figure 2
Greystone Energy Systems, Inc. 150 English Drive, Moncton, NB E1E 4G7 Canada Tel: +1-506-853-3057 Tollfree (North America): +1-800-561-5611 Fax: +1-506-853-6014

Introduction

The duct RH/T network sensor uses a highly accurate and reliable
Thermoset Polymer based capacitance humidity sensor and
curve-matched NTC thermistor temperature sensor together with
state-of-the-art digital linearization and temperature compensated
circuitry to monitor humidity and temperature levels in a duct and
transmit values via Modbus communication to a building automation
system. The sensors are encapsulated in a 60 micron HDPE lter 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 RH/T sensor. Failure to follow these instructions may result in
product damage. Do not use in an explosive or hazardous environment,
with combustible or ammable 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/Cable Gland Connection Holes
Email: support@greystoneenergy.com Web: www.greystoneenergy.com
Duct RH/Temp Sensor
Installation Instructions
Figure 1
Figure 4
EMT Connector
NTDAMOD
Connection Hole Plug