Crowcon Gasflag Інструкції з монтажу, експлуатації та технічного обслуговування для установника та користувача - Сторінка 3
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2 INSTALLATION
When carrying out any installation work, ensure that local regulations and
site procedures are followed.
2.1 Mounting
The Gasflag control unit is designed for wall mounting in a non-hazardous
location and is suitable for indoor environments in light industrial or
commercial use. Fixing holes are provided to attach the unit.
The Gasflag is not suitable for outdoor or hazardous environments.
2.2 Cabling requirements
Cabling to Gasflag must be in accordance with the recognised standards
of the appropriate authority in the country concerned, and must also meet
the electrical requirements of the unit. Crowcon recommends the use of
2-core twisted pair cable. The Gasflag requires a dc supply of 13-28 V,
please refer to local regulations for earthing requirements.
The power supply provided with the Gasflag control unit is not fitted with
an AC plug. As Gasflag is a safety device, the power supply must be
permanently wired to a dedicated AC spur fed from a circuit breaker,
marked as the disconnecting device for the Gasflag. The circuit breaker
must comply with the relevant requirements of IEC 947-1 and IEC 947-3.
These procedures ensure that the installation complies with the
requirements EN 61010-1 (Low Voltage Directive). Please refer to the gas
detector or 4-20 mA device manual for cabling requirements. Generally
there must be a supply of 10 V at 20 mA to the detector terminals.
2.3 Electrical connections
Figure 2.1 Electrical connections for 4-20 mA device
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