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7.5.1 Conveying Condensable Vapours
Water vapour within the gas flow is tolerated within certain limits. The conveyance of
other vapours shall be agreed upon with Busch.
If condensable vapours are to be conveyed:
30 minutes
* not included in the scope of delivery
• Close the isolation
valve*
• Warm up the machine
(WARM-UP MODE)
• Open the isolation
valve and perform the
process
• Cool-down the
machine
(COOL-DOWN MODE)
END
START
30 minutes
• Close the isolation
valve
7.6 External Dry Contact
The external dry contact allows a signal to open/close the relay “KA1” (see electrical
scheme in the control unit cabinet) to control an isolation valve or a vacuum booster.
It can be controlled either by a time delay or by pressure.
This parameter is only available for “Role 2” people, see Role and User [►11].
To activate the external dry contact:
• Go to “OPERATIONS” > “PARAMETERS”.
• Access to the third page.
• Choose between one of the two parameters “Time delay” and “Pressure con-
trol” (password required).
HOME
PARAMETERS
OPERATIONS
MODE
MAINTENANCE
SYSTEM
WEEK PLANNER
Closing dry contact
On
NEXTPREVIOUS
10 s
Off
Time delay
Pressure control
Enabled
External dry contact Open / closed
• Press a value to change it.
Parameter Default value
Time delay 10 s
Pressure control 20 mbar
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