Spectron BE56-2U, Руководство пользователя

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7 | Operation Spectron Gas Control Systems GmbH
22 GES_BE56-2U_0720
7 Operation
7.1 General information on operation
During regular operation, the system will be in supply mode.
The procedure for decommissioning and recommissioning for extended system standstills is de-
scribed in the "
Decommissioning and recommissioning [
}
30] " chapter.
Valve HPI is controlled via the operating firm's controller (optional for SP3, SP4 and BM/
BE). This is not included in the delivery scope of Spectron and is therefore not covered
in this user manual.
7.2 Gas supply interruption
7.2.1 Interruptions to operation for less than 48 hours
For short interruptions to operation (less than 48 hours), the valve on the process gas source
and valve PLI or a valve on the consumer can be closed. No other shut-off and safety measures
are required.
7.2.2 Interruptions to operation for more than 48 hours
For longer interruptions to operation (over 48 hours), the following steps must be carried out:
For longer interruptions to operation (over 48 hours), the following steps must be carried out:
1. Close all valves.
2. Open valve HPV to reduce the pressure.
3. Close valve HPV.
7.2.3 Putting the pressure control panel into a safe condition
In the event of interruptions in operation for more than 5 days or pending maintenance or servi-
cing, the pressure control panel must be put into a safe condition. First carry out the steps "
In-
terruptions to operation for more than 48 hours [
}
22] ".
The process gas source must be connected during flushing (see " Connecting the process gas
source [ } 20] "). Also observe the " Preparations for commissioning [ } 20] " chapter.
To ensure high gas purity, pressure purging is to be performed as described below.
7.3 Exchanging the process gas source
NOTICE
Penetration of ambient air into the system
Each time you change the cylinder, ambient air gets into the connecting parts of the system. To
prevent the gas and the entire system from being contaminated, the connection must be purged
before gas is drawn from the cylinder again. In the case of non-toxic, non-corrosive gases, this
can be done by means of multiple pressure purges with process gas. In the case of corrosive or
toxic gases or gases that are hazardous in some other way, purging must be carried out with in-
ert gas.