30 • Installation and Commissioning of the Unit Operating Manual Freeze Dryer ALPHA 1-2 LDplus
The accessory components are connected to the
ALPHA 1-2 LD
plus
freeze dryer according to the connection
diagram. Please observe the following:
Centring rings and clamping flanges with wing nuts are used as
connecting elements (small-flange connection according to ISO
28403 or DIN 2861, see the following instructions).
Instructions for the connection with centring rings and
clamping flanges
Small flange connections which are not mounted properly between
the aggregates or to connect hoses are often the reason for
serious vacuum problems.
Please loosen the connection and replace the centring ring (with
sealing ring inside) centrically between the flange connections.
Seal the connection with the clamping flange by fastening the wing
nut.
Please take care that the centring ring does not get out of place
and does not tilt.
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