BEHR S5 - Changing the Viton Stopper; Checking Inside of Device

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Viton stopper
The Viton stopper for connecting the sample vessel
and the steam tubing inside the device are the parts
that are most subject to wear and tear. Therefore a
spare stopper and a piece of spare hose come with
this device.
A Maintenance Set including several other spare
parts is available. Ask your behr customer service.
Changing the Viton Stopper
If the Viton stopper gets fissured or otherwise faulty, it
must be replaced. Do not perform distillations with a
leaky stopper; it will cause false (low) analysis results!
Pull the defective stopper off the distillation head. If
need be, cut it with a sharp knife.
Push the new stopper on the nozzle.
Checking the Inside of the
Device
In the rear side of the device you will find two mainte-
nance doors. In order to check the inside of the device
you just open these doors; you need not pull off the
hoses nor dismantle the back panel.
Caution: some parts inside the device
will get hot and can burn you. Wait for the
device to cool down before opening it.
Danger of electric shock! Make sure that
no liquids get into the apparatus housing
or come in contact with the electrical wires
and connections. Unplug the mains plug
before opening the appliance.
The two maintenance doors are shut up with two
knurled screws each; for opening them you just turn the
knurled screws loose. The knurled screws are fastened
to the doors so you cannot lose them.
Regularly check if any hoses or connections have
become leaky.
Read in the following chapter how to change the steam
tubings. A maintenance set containing some more
hoses and non-return valves that are frequently needed
is available; it comes with a user‘s manual in German
and English.
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Upper maintenance door
Knurled screws