Installation – Det-Tronics GTS Sensor Module User Manual

Page 8

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6

9.1

95-8616

installation

The gas detector can be installed either in a stand-alone

configuration as a loop powered device, or it can be

connected to a UD10/UD20 Universal Display Unit.

NoTe

The gas detector housing must be electrically
connected to earth ground. A dedicated earth
ground wire is provided on the transmitter for
connection to earth ground or to a grounded
housing.

The detector must always be installed per local

installation code.

Before installing the gas detector, define the following

application details:

IdEnTIfICATIon of vAPoR(S) To bE dETECTEd
It is necessary to always identify the vapor(s) of interest

at the job site. In addition, the fire hazard properties

of the vapor, such as vapor density, flashpoint, and

vapor pressure should be identified and used to assist

in selecting the optimum detector mounting location

within the area.

IDENTIFICATION OF DETECTOR MOUNTING
lOCATIONS
Identification of the most likely leak sources and

leak accumulation areas is typically the first step in

identifying the best detector mounting locations. In

addition, identification of air current/wind patterns

within the protected area is useful in predicting gas leak

dispersion behavior. This information should be used

to identify optimum sensor installation points.

If the vapor of interest is lighter than air, place the sensor

above the potential gas leak. Place the sensor close to

the floor for gases that are heavier than air. Note that air

currents may cause a gas that is slightly heavier than

air to rise under some conditions. Heated gases may

also exhibit the same phenomenon.

The most effective number and placement of detectors

varies depending on the conditions on site. The

individual designing the installation must often rely

on experience and common sense to determine the

detector quantity and best locations to adequately

protect the area. Note that it is typically advantageous

to locate detectors where they are accessible for

maintenance. Locations near excessive heat or

vibration sources should be avoided if possible.

Final suitability of possible gas detector locations

should be verified by a site survey. If any questions

arise regarding installation, please contact the factory.

DEvICE MOUNTING ORIENTATION
The gas detector must be mounted in a vertical position

only, with the sensor pointing down (See Figure 5).

Important

The sensor should be oriented with the LeDs
facing forward so they are easily visible to
personnel within the area. To ensure correct
orientation (the LeDs are not visible when power
is off), position the GND lug on the left hand side
and the calibration notch to the front. Note that the
LeDs are located directly above the calibration
notch.

GREEN LED

CALIBRATION NOTCH

B2436

GND LUG

Figure 5—Correct Mounting Orientation for the GT3000

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