Buchi Rotavapor R-100 - Cleaning and Servicing; Vapor Duct and Leak Checks

BÜCHI Labortechnik AG Cleaning and servicing | 7
Operation Manual Rotavapor® R-100 39/60
7 Cleaning and servicing
NOTE
Users may only carry out the servicing and cleaning operations described in this sec-
tion.
Any servicing and repair work which involves opening up the housing may only be
carried out by BUCHI service technicians.
u Use only genuine BUCHI consumables and spare parts in order to ensure correct
operation of the device and preserve the warranty.
u Before carrying out any servicing work, empty the heating bath and all glass com-
ponents.
7.1 Inspecting and cleaning the vapor duct
1
2
u Switch off the device.
u Remove the evaporating flask (see Chapter6.3.1 "Removing the evaporating
flask", page37).
u Press the lock release button (1) on the front of the rotary drive unit.
u Firmly hold the vapor duct and turn the combi-clip (2) clockwise until the vapor
duct is released.
u Visually inspect the vapor duct for damage, wear marks and residues.
u Clean the vapor duct with a paper towel and water or ethanol.
u Refit the vapor duct (see Chapter5.3 "Fitting the vapor duct and condenser",
page22).
7.2 Checking the system for leaks
Precondition:
R An external vacuum pump with a pressure gauge is connected.
u Make sure that all flasks are fitted and the glass stopcock is closed.
u Connect the vacuum pump and evacuate the R-100 to a pressure of 50 mbar.
u Switch off the vacuum pump. If necessary, disconnect the vacuum tubing so as to
exclude the vacuum pump as a possible source of a leak.
u Check the pressure after one minute.
5 If the pressure has risen by less than 3 mbar after one minute, the system is air-
tight.
If the system is not air-tight:
u Check all seals (see Chapter7.3 "Checking seals", page40).
u Examine all tubing and replace if they are brittle or cracked.
u Grease ground glass joints if necessary.