Lauda ECO Silver E 4 S Operation Manual page 33

Operation as circulation thermostat
Note:
Always use the largest possible cross-section and the shortest possible hose lengths in the external circuit.
–
For a hose cross-section that is too small a temperature gradient occurs between the bath and external con-
–
sumer due to a volume flow that is too low. In this case increase the bath temperature or the pump level appro-
priately.
Secure the hoses with the aid of hose clips.
–
If the thermostat is to be externally controlled, a temperature sensor must be fitted in the external consumer.
–
If the consumers are situated at a higher level and with the pump stopped and air seeping into the external fluid
–
circuit, then even with enclosed circuits the external volume may run empty. There is danger of the thermostat
overflowing.
If no external consumer is connected, the outflow nozzle must be sealed off or connected to the return nozzle
–
by a hose.
Notice
Notice
10/2019 i
To ensure the greatest volume flow, with operation as a circulation
thermostat ensure the shortest possible hose connections with the
largest possible hose internal diameter.
–
Pump connection ( labeling on the housing of the control head):
 Outflow OUT (front)
 Return to the bath IN (rear)
Pump connections not closed off
Environmental hazard from leaking heat transfer liquid
Fit sealing plugs to the pump connections when no external

consumers are connected and set the flow distribution to in-
ternal "INT".
Thermostat overflow
Environmental hazard from leaking heat transfer liquid
Do not position the thermostat above the consumer.

ECO Silver
Connect a hose with 11 – 12 mm inside diameter ( 6.4)
to the pump connections.
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