Installing The Variogard System; Mechanical Installation - Dräger VarioGard Gebrauchsanweisung

Installing the VarioGard system

Mechanical installation

Installing the VarioGard system
The VarioGard system may only be installed by duly trained specialist
personnel.
Mechanical installation
VarioGard central unit
Position the central unit in a clearly visibly, easily accessible place.
1 Remove strips from upper part (not fitted before delivery).
2 Undo the four screws on the upper part and remove the upper part (not
fitted before delivery).
3 Remove insulating plate.
4 Fit additional cable entries (optional accessories) if required for electrical
installation.
The unit is secured with four screws (4 mm) inserted through the housing
– drilling template on page 85.
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Before finally fitting the upper part, refit insulating plate 3 to ensure
electrical safety !
VarioGard transmitter
The transmitter location should be selected in accordance with the relevant
regulations in such a way that gas in the area under surveillance is detected
by the system reliably and in good time.
– The correct installation location should be selected for maximum
protection. Free circulation of air around the transmitter must not be
obstructed.
– Select the installation location for the transmitter as close as possible to
where leaks are likely to occur:
– to monitor gases or vapours that are lighter than air (e.g. CO, NH
the transmitter should be positioned higher than the possible leak site.
– to monitor gases or vapours that are heavier than air (e.g. NO), the
transmitter should be positioned as close to the ground as possible.
– Local air flow conditions should be taken into account. The transmitter
should be sited where the highest gas concentration is expected.
– Install the transmitter in a position where there is least risk of mechanical
damage. Fit a grille (optional accessory) if necessary.
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