Operating instructions

Detailed information about the technical data of the
pump can be found in
Ä Chapter 11.3 ‘Standard and
optional pumps’ on page 85.
3.4.2 Manometer
The device types with bypass have a manometer for reading the
pump pressure which can be regulated via the bypass of the
machines.
The bypass is available for device types starting with
model VC 1200 (W).
3.4.3 Refrigeration unit
The refrigeration unit includes the following components:
 Compressor
A reciprocating compressor is used in the refrigeration unit.
The compressor is equipped with a motor circuit breaker which
trips on the compressor temperature and compressor current
consumption.
 Condenser
Depending on the device type, an air-cooled or water-cooled
condenser is used in the refrigeration unit. For air-cooled con-
densers, the heated air is discharged to the environment. The
fresh air is sucked in through the front of the device using a
fan, heated and discharged on the rear of the device. In water-
cooled condensers, the heat is dissipated via the cooling water
circuit.
 Evaporator
In the internal bath, heat is discharged with a pipe coil evapo-
rator.
Technical information for the refrigeration unit can be
found in
Ä Chapter 11.2 ‘Refrigeration unit’ on page 84.
3.4.4 Interfaces
A general overview of the standard interfaces and the optional
interfaces of the device can be found in the following sections.
Fig. 5: Manometer
Design and function
Variocool 18