24
Rotavapor
R-220 EX
4 Putting into Operation
4.16 Heating Medium
Never operate the heating bath when there is no heating
medium in it!
Suitable heating media include:
• Water (some Borax should be added when using deio-
nized water)
• Heat transfer oils suitable for use at temperatures up to
160° C (e.g., Ucon HTF 14, Fluka AG).
• Water-soluble polyethylene glycol
(e.g., Polyethylene glycol 600, Fluka AG).
After the oil bath has been standing opened for a prolonged
period, condensation water can collect on the bottom. When
the bath is used again, it must be heated above 100°C with
rotating flask in order to drive the water out.
4.17 Compressed Air Connection
The maximum permissible pressure is 8 bar. Make sure that
the compressed air is oil-free. The pressure hose must be
secured with the provided pivoting hose clamp.
Pressure is limited to 4 bar at the works. Increasing pressure
will not increase performance; rather, it causes greater air
consumption and thus results in more noise.
4.18 Vacuum Controller
The Vacuum Controller is delivered with the R-220 EX and
is already installed.
Connect the individual connections as shown here.
Vacuum connection to pump
Vacuum connection: valve – glass assembly
(see pages 18 and 19)
Vacuum connection: controller – glass assembly
(see pages 18 and 19)
Fig. 4.23: Reset the safety temperature limiter
Fig. 4.24: Valve and manometer connections
