Warnings; Limitations - DALEMANS DAT 420 Instruction Manual

WARNINGS

▪ The warranty provided by DALEMANS will be voided if this equipment is not installed, operat-
ed and maintained in strict accordance with these instructions, warnings and within the opera-
tional limits stated.
▪ By respecting these instructions you ensure the proper operation of the equipment. Should
you require any further information about the installation, the use or the maintenance of this
equipment, do not hesitate to contact DALEMANS.
▪ Always follow the recommendations hereafter so as to avoid premature ageing of the sensor
and to guarantee its optimal operation. These recommendations are general directives.
▪ Refer to local regulations in force before proceeding with installation works (i.e. standards
IEC 60079-14 and IEC 60079-29-2). Local regulations have always precedence on the rec-
ommendations of the manufacturer.
▪ Maintenance must be performed according to the procedure given by DALEMANS or his local
representative. Maintenance or service attempts without observing these instructions or with-
out the assistance of DALEMANS may prevent the equipment from working properly and from
ensuring the safety of the occupants of the monitored premises.
▪ Modification, disassembling and total or partial destruction of this equipment may invalidate
the essential safety requirements of the whole plant.
▪ Use only DALEMANS original replacement parts. The use of non-original parts may invalidate
the certification and warranty of the equipment.

LIMITATIONS

▪ Persistent exposure to high levels of toxic gas will shorten the sensor life. Sensors may be
cross sensitive to other gases.
▪ Long-term unpowered storage might shorten the electrochemical sensor life. Avoid discon-
necting the electrochemical sensor from the amplifier Printed Circuit Board.
▪ Gas detectors should be installed as late as possible in any program of construction opera-
tions (i.e. construction of a new plant, refitting or maintenance) but before the presence of gas
or vapours in the system, so as to avoid damage to sensors resulting in particular from such
activities as welding and painting. If already installed, detectors should be protected by an air-
tight seal to avoid contamination during construction works, and should be clearly marked as
being non-operational.
▪ Gas detectors must be protected from direct sunlight, vibrations and mechanical impacts.
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PRIOR to carrying out installation, maintenance, or service operations on the
gas detector ensure that no gas or vapour is present in the surrounding atmos-
phere.
INSTALLATION, COMMISSIONING and MAINTENANCE must be carried out by
DALEMANS or by an approved service centre only, and in any case by qualified
personnel who has received a suitable training.
Gas detection equipment must be calibrated at least once a year to mitigate the
loss of sensitivity of the sensor.
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