Lauda ECO Silver E 4 S Operation Manual page 30

Connection of the cooling water
Note that the following conditions apply for the connection of the cooling water supply:
Cooling water pressure (feed - outlet)
Differential pressure (feed - outlet)
Cooling water temperature
Cooling water quantity
Cooling water hose for connection to the device
Ways of adjusting the pump flow
The circulation of the heat transfer liquid by the pump can be divided between internal (INT) and external (EXT) with the aid of
the selector switch at the front on the control head (flow distribution). The adjustment is continuously variable and is also possi-
ble at any time during operation. .
The adjustment between internal and external circulation is only practicable with a connected external consumer. A pump
connection set is needed to do this. This set is included as standard with cooling devices and with the heating devices E 4 S and
ET 15 S. With immersion thermostats and the other heating thermostats the pump connection set is available as an accessory
( 9).
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max. 10 bar overpressure
min. 3.0 bar
10 to 15 °C recommended,
10 to 30 °C admissible with power restrictions)
see Technical Data ( 10)
min. 13 mm
With a pure bath application the selector switch has to be set to INT.
ECO Silver 10/2019 i