Lauda ECO Silver E 4 S Operation Manual page 60

Decalcifying the cooling water circuit
At regular intervals of 3 months or longer (depending on the water hardness / degree of contamination of the cooling
water) the water-cooled condenser must be decalcified or cleaned.
Required equipment:
Two containers of 10 to 20 liters.

Use a suitable pump (drum pump) or possibly use hose with a funnel with funnel located above the cooling

water inlet.
Hose between container, pump and cooling water inlet and also between cooling water outlet and container.
Via the water inlet hose, fill the device with decalcifier (pump or hose). Set the set value to 10 °C; after the chiller
starts the water circuit can be filled. Circulate the decalcifier with the pump or continue to top up the decalcifier. Allow
the decalcifier to take effect (refer to table below). Drain the unit. Reconnect the device to the water supply and thor-
oughly flush out (refer to table below).
Acting time Continue the pump stage until most of the foamy reaction, usually at the start, has decayed. Generally,
this is achieved after about 20 to 30 minutes.
Decalcifier LAUDA article number: LZB 126 (5 kg)
When handling the chemicals, the safety information and the instructions for use on the package are to
be followed.
Flushing Allow at least 10 liters of water to flow through.
60 / 124
Standard
Cooling water connections
ECO Silver
Alternative
Interchange containers
when top one is empty
10/2019 i