JULABO FLW4006 Recirculating Coolers - Manual (Page 18)

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Even high quality heat exchangers as they are installed in our equipment can be
damaged by unsuitable cooling water.
The quality of the cooling water depends on the local conditions.
The heat exchanger may become leaky due to corrosion or it may become clogged due
to particulate matter
Caution: Pump pressure
 Determine and check the max. admissible pressure for the external circuit before
putting the unit into operation. The max. pressure is determined by the weakest
element in the circuit (e. g. glass equipment).
 Securely attach all tubing to prevent slipping.
Notice: Flood hazard!.
In case the system to be cooled is located at a higher level than the recirculating
cooler, take note of bath liquid flowing back when the unit is switched off.
Return flow safety device
Should the filling volume of the bath tank not be sufficient, prevent the liquid from
flowing back by using shut-off valves..
Order No. Description Suitable for
8 970 454 Shut-off valve G ¾“ FL(W) 2503/4003
8 970 458 Shut-off valve G 1¼“ FL(W) 2506/4006
The following questions shall help to recognize possible dangers and to reduce the
risks to a minimum.
 Are all tubes and electrical cables connected and installed?
Note:
sharp edges, hot surfaces in operation, moving machine parts, etc.
 What to do when a dangerous substance was spilled on or in the unit?
Before starting to work, obtain information concerning the substance and determine
the method of decontamination.