Further Information On The Gas Connection; Electrical Connections; General Safety Instructions - Siemens SIPROCESS GA700 Compact Operating Instructions

5.1.7

Further information on the gas connection

It is essential that you observe the following points for trouble-free operation:
● When tightening the union nuts at the gas couplings, ensure that you counter properly in
order to achieve a tight gas path.
● When removing purging gas ensure that the pressure drop via the exhaust air line does
not result in the following components switching off:
- Ex py or Ex pz safety equipment during the pre-purging phase,
To achieve this, the exhaust air line must be dimensioned accordingly (for example with
an internal diameter of G 1", the length of the exhaust air line may be about 20 m).
● Always adhere to the pre-purging time that can be set at the Ex py or Ex pz safety
equipment!
The pre-purging time amounts to 10 minutes at a purging flow rate of 60 l/min.
● Do not supply sample gas to the analyzer until the pre-purging phase has ended.
● OXYMAT 7: Before supplying sample gas, the microflow sensor must be reliably flushed
by reference gas.
The reference gas must therefore also be connected (pre-purging period = 10 min) when
the Ex py or Ex px safety equipment is switched on.
Note that the reference gas pressure must always be 2 bar ± 0.1 bar above the sample
gas pressure.
5.2

Electrical connections

5.2.1

General safety instructions

Incorrect electrical connection
Danger of electrocution
• Connect the device to the power supply in accordance with the technical specifications.
• At the mounting location of the device observe the applicable directives and laws for
Devices in explosion-proof design
Compact Operating Instructions, 05/2018, A5E35134047-03
- Analyzer device during the operating phase.
WARNING
The information about proper electrical connection is available in section "Technical
specifications (Page 83)".
installation of electrical power installations with rated voltages below 1000 V.
Connecting
5.2 Electrical connections
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