Mechanical Installation; Electrical Installation - Dräger Polytron 5000 Série Mode D'emploi

en Safety-related information
– Observe the documentation of the relevant sensor (e. g.
PIR 7000 IfU).
1.3

Mechanical installation

– Strict compliance must be given to the local, state,
national codes and regulations that govern the installation
of gas monitoring equipment.
– The physical data of the gas or vapor to be detected and
the specifics of the application, (e.g. possible leaks, air
movement/draft, etc.) must be taken into account.
– The future use of accessories and maintenance
equipment must be kept in mind.
– The access of the gas or vapor to the sensor must not be
obstructed.
– The instrument must not be exposed to radiant heat that
will cause the temperature to rise beyond the limits stated
in 17.6 Environmental parameters. The use of a reflecting
shield is recommended.
– The instrument may be equipped with a dust plug at the
conduit entry. This plug is not explosion proof nor meant to
be watertight, and must be removed before connecting the
instrument to a sealed conduit or installation of a
flameproof cable gland.
– Unused openings must be closed with a plug. For correct
tightening torques of conduit hubs, cable glands, plugs
and sensor see 17.7 Tightening torque.
– For non-conduit installations, an approved cable gland
must be used (e.g. Hawke A501/421/A/¾" NPT or
equivalent)
– The flameproof / explosion proof joints are not in
accordance with the relevant minimum or maximum
values of EN/IEC 60079-1. The joints are not intended to
be re-worked by the user.
– WARNING: Only for conduit installations: To reduce the
risk of Ignition of Hazardous Atmospheres, the conduit
must be sealed within 18" of the enclosure.
®
Polytron 5100 EC-specific:
– Recommended sensor orientation: downwards (As shown
in figure C on the fold-out page).
®
Polytron 5200 CAT-specific:
– Preferred orientation of the sensor: downwards. If the
sensor inlet is secure from mechanical damage, dirt and
water ingress, any other orientation is permissible.
– For CSA-conform operations only:
The use of the optional splash guard (6812510) is
mandatory to comply with CSA approvals.
®
Polytron 57x0 IR-specific:
– Preferred orientation of the Dräger PIR 7x00 sensor must
be observed (See figure E on the fold-out page). Larger
deviations and the use of the pre-installed splash guard
will increase the response time (see Instructions for Use
for PIR 7x00).
– Any other orientation is only permissible if the PIR 7x00 is
used without splash guard, e.g. for applications in ducts. If
installed in a duct, there is an increased risk of deposits
building up on the optical surfaces.
– The use of the pre-installed splash guard is recommended
to protect the sensor from water and dust.
– If the pre-installed splash guard (part number 6811911 or
6811912) is used, it must be ensured that the status
indicator lights are in a vertical line and the Dräger logo of
the splash guard must be horizontal. A maximum
deviation of ±10 degree from the horizontal position is
permissible.
– Liquids and/or build up of deposits on the optical surfaces
of the PIR 7x00 may result in a warning or fault.
– For the explosion proof version it is recommended to use
a spacer (part number 6812617) when the instrument is
mounted on a wall or to a level structure.
1.4

Electrical installation

– Strict compliance must be given to the electrical codes
that govern the routing and connection of electrical power
and signal cables to gas monitoring equipment.
– Ferrules must be used.
– The conductors for the power supply must have an
adequately low resistance to ensure the correct supply
voltage at the instrument.
– Wire insulation must be stripped by 5 to 7mm.
– Secondary circuit intended to be supplied from an isolating
source (N/A for relay circuits).
– When installed at locations exceeding ambient
temperatures of 55 °C, use only appropriate wiring,
specified for at least 25 °C above the maximum ambient
temperature.
Analog interface
– To ensure proper operation of the instrument, the
impedance of the 4 to 20 mA signal loop must not exceed
500 Ohms. Depending on the operating voltage and
according to the application , certain minimum
impedances must be observed 17.2 Signal transmission
to control unit.
Relay option
– At voltages >30 V AC or >42.4 V DC, the relay cables
must be enclosed in protective tubing, or double-insulated
cables must be used.
– The wiring for the optional relay module must be selected
and fused according to the rated voltages, currents and
environmental conditions.
– To ensure that a fault is recognized - without having to
look at the instrument - an alarm device must be
connected to the fault relay.
– Voltage differences can cause insulation faults. Do not mix
electric loads with different voltage types (AC or DC).
Using DC loads, ensure that relay contacts only control
devices with the same DC voltage rating. Using AC loads,
ensure that relay contacts are only connected to devices
sharing a common phase.
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Dräger Polytron 5000 Series