Buchi Rotavapo R-220 SE User Manual download pdf (Page 31)

4 Description of function

31 R-220 SE Operation Manual, Version F

The optional cooling water valve interrupts the water ﬂow in

order to effectively reduce the water consumption. It must be

installed in serial after the cooling water source.

See master drawing for appearance

and mounting position.

The optional vacuum valve must be installed in case a 3rd

party vacuum pump is used. It is a safety device to control the

vacuum level.

Fuse triggered

Fuse ok

Resettable fuses. Gently push them back into prestressed posi-

tion when fuses are activated.

The optional foam detector is located before the expansion

vessel. In case of foam detection its signal opens the aeration

valve for an instant. This aeration pulse causes the foam to

collapse. For installation a special distribution piece is needed!

Alarm output with MiniDIN 4-pole socket. It supplies a “normally

open” output. See technical data and section 3.2 for more

information.

Mains input cable to supply the Rotavapor. Output socket to

supply a vacuum pump. Mind the voltage and maximal output

current, when installing a vacuum pump! The combination

of Rotavapor and vacuum pump must not violate the local

electrical safety regulations. Contact an electrician before

connecting any device.

USB service interface, socket type B.

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Buchi Rotavapo R-220 SE User Manual Page 31