Buhler GAS 222.30 Ex2, Installation And Operation Instructions Manual

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GAS 222.30 Ex2
CAUTION Drive pressurised
Never loosen or remove the cover or any accessories with the drive pressurised.
CAUTION Never open the drive with the function “single-acting”!
This may only be done at the manufacturer’s plant.
CAUTION Do not attach levers or tools to the drive’s spindle!
Levers and tools on the spindle can flap around when switching the compressed air or
control voltage back on and cause serious injury or damage!
6.1 Replacing the Inlet Filter
The probes are equipped with an inlet filter which is always inside the process stream. The filter is suitable for (Inert gas) blow-
back with compressed air, i.e. blowing air (Inert gas) through the filter from the inside to the outside to remove adhering
particles. When sampling flammable gases, nitrogen (inert gas) must be used for blowback. Blowback of explosive gases is pro-
hibited.
The effectiveness of cleaning a filter within a process is directly influenced by the available airflow (amount of gas). We there-
fore recommend using a pressure vessel directly on the probe.
With sufficient inlet filter blowback (within the process stream) the probes are maintenance-free. However, due to process con-
ditions the filter may clog over time. In this case the filter element will need to be replaced.
To do so, the probe must be completely removed and reinstalled after changing the element.
Condensate inside the pressure vessel
Depending on the installation site and application conditions a small amount of condensate may form inside the blowback air
pressure vessel. Open the drain screw at the bottom of the vessel and drain the condensate at least once a year.
If the probe needs to be serviced more frequently due to operating conditions, we recommend also draining the condensate at
these intervals.
CAUTION High pressure
Pressure vessel under pressure.
Before opening the condensate drain, close the air supply to the blowback control and
drain the vessel by manual blowback.
Pressing the main switch for the blowback control to interrupt the voltage supply.
14 Bühler Technologies GmbH BE460064 ◦ 08/2019