Distech Controls GS-CMAD Series Hardware Installation Manual

GS-CMAD Series
Advanced CO Sensors
Figure 1: GS-CMAD (Duct) CO Sensors
Product Description
This document describes the hardware installation procedures for the
GS-CMAD (Duct) CO Sensors.
The GS-CMA Series are carbon monoxide gas detectors. They use an
electrochemical sensor to monitor the carbon monoxide level and
output a field-selectable 4-20 mA, 0-5 or 0-10 Vdc. The sensing range
and output may be scaled to either 100, 150, 300, 400 or 500 ppm via
the on-board menu.
General Installation Requirements
For proper installation and subsequent operation of each device, pay
special attention to the following recommendations:
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Upon unpacking the product, inspect the contents of the carton for
shipping damages. Do not install damaged device.
-
Avoid areas where corroding, deteriorating or explosive vapors,
fumes or gases may be present.
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Ensure that all equipment is installed according to local, regional,
and national regulations.
Personal injury or loss of life may occur if you do not follow a
procedure as specified.
Equipment damage or loss of data may occur if you do not
follow a procedure as specified.
Take reasonable precautions to prevent electrostatic
discharges to the controller when installing, servicing or
operating the controller. Discharge accumulated static
electricity by touching one's hand to a well-grounded object
before working with the controller.
H a r d w a r e I n s t a l l a t i o n G u i d e
Mounting
The CO duct type sensor installs on the outside of a return air duct with
the sampling tube inserted into the duct. Use the included foam plug to
prevent air from entering the enclosure through the conduit and
causing an incorrect reading. Mount the sensor in an easily accessible
location in a straight section of duct at least five feet from corners and
other items that may cause disturbances in the air flow. Avoid areas
with vibrations or rapid temperature changes.
The duct CO detector principal of operation is based on the Venturi
effect of the probe that extends into the HVAC duct. Air flowing through
the duct is forced into the vent holes on one side of the probe, into the
enclosure, over the CO sensor and then is drawn back out of the
enclosure via the probe vent holes on the opposite side.
Drill or punch a 1-1/8" or 1-1/4" hole in the duct at the preferred
location and insert the probe into the hole to mark the enclosure
mounting holes. Remove the unit and drill the four mounting holes.
Clean all drilled holes of debris before mounting the device. Mount the
enclosure to the duct with four sheet metal screws such that the duct
air flow is parallel with the vent holes in the probe (i.e.: air flows directly
into the probe holes). To prevent air leaks, ensure the gasket is
compressed around the probe between the device enclosure and the
air duct.
Open the cover by releasing the latch and connect the device
according to the wiring instructions. After wiring and setup are
complete, close and latch the cover. Secure it with two self-tapping
screws in the holes provided.