WEG CFW11W G2 Series User Manual page 27

Installation and Connection
ATTENTION!
It is recommended the use of stainless steel hydraulic connections in the application cooling system.
Figure 3.16 on page 3-10
Diaphragm
accumulator
3
Bypass valve
Heat
Exchanger
The bypass valve is necessary for the temperature control and protection against condensation. The diaphragm
accumulator ensures a quite constant pressure in the cooling system even when great variations occur in the
coolant temperature. The pump provides the continuous coolant flow; it is recommended that such pump be
made of stainless steel. The acceptable differential pressure in the cooling circuit in relation to the atmosphere
must not exceed 6 bar. That must be guaranteed by the over pressure valve.
ATTENTION!
The hoses that connect the cooling system to the UP11W G2 must not conduct electricity.
ATTENTION!
The acceptable differential pressure in the cooling circuit in relation to the atmosphere must not
exceed 6 bar.
ATTENTION!
The cooling of the UP11Ws G2 must not be connected in series in the circuit of the cooling system.
3-10 | CFW-11W G2
shows a simplified diagram of a closed cooling system for the UP11W G2.
Degassing valve
Over pressure valve
Temperature transmitter
Pressure transmitter
TT PT FT
UP11W
Figure 3.16: Simplified example of a closed cooling system
Flow transmitter
FI FI
UP11W UP11W
Flow indicators
FI FI
UP11W UP11W
FI