Atest Gaz Alpa EcoWent XT, User Manual

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9 Life cycle
9.1 Transport
The device should be transported in such a manner as new devices of this type. If the original box, extrusion
or other protective elements (e.g. plugs) are not available, you must manually protect the device against
shock, vibration and moisture using other equivalent methods.
Transport should take place in environmental conditions described in Table 6.
9.2 Set-up
9.2.1 Location of detectors
The location of detectors should be determined by the designer of the system, taking into consideration the
following principles:
it is recommended to mount the CO detector at the level of the upper respiratory tract, i.e.
approx. 1.2 -1.7 m over the ground (typically 1.5 m),
for a typical underground parking lot, it may be assumed that one detector is required per every
120-200 m 2 and it is dependent on the local conditions (ventilation, place of the probable gas
accumulation, the structure of the facility),
the detectors should not be exposed to the direct impact of water or other chemical substances
(e.g. cleaning agents during the facility cleaning), direct impact of sunlight, rain, water,
the detector should be protected against damaging mechanical exposures,
the detector location should enable conducting checks and the sensor adjustments, as well as its
replacement or disconnection.
9.2.2 Installation
Electrical installation of the detectors may only be performed by persons having appropriate qualifications
or acting in agreement or under the supervision of the manufacturer. The electrical installation should be
performed in accordance with the design.
The electrical installation of the detectors should be performed in accordance with the general
principles of performing measurement and control systems
2
. Cables should be installed in a way
protecting them from damage. Installation in cable ducts is required.
All activities related to the connection of the detectors and other components of the system
must be made while the power supply to the control unit is switched off. Although the
power supply to the gas detection system is switched off, there is a possibility that the
source of dangerous voltage may be another system (e.g. a ventilation system using pin
outputs).
or making connections, it is possible to use three-wire cables e.g. of the YTKSY, OMY, LiYY type
(bus). For connecting the Alpa EcoWent XT detector, it is necessary to apply a four-wire conductor.
The selection of a specific cable type depends on the designer and should take into account the
conditions in the place in which the gas detection system operates. The maximum lengths of the
wires connecting the detector with the control unit for a given cross-section of cable wire are
given in Appendix [4].
2 Control and measurement instruments
p. 16|24
User Manual: POD-042-ENG R04