LAUDA Water Circulation coolers
WK, WKL
YAWE0019/18.12.01
- 19 -
7.
Filling and connection of external consuming devices
Fill the unit with bath liquid which is suitable for the operating temperature in accordance with Section 5.
ATTENTION:
Water must not be used as heat carrier below 5°C. In case of operating temperatures
below 5°C please use Kryo 30 for example (section 5.1.)!
When filling for the first time the pressure connection should be left open to assist in purging the pump,
otherwise the pump may be permanently damaged!
Remove the plug on the filler opening at the front. The use of a funnel may be convenient for filling.
When starting up for the first time the bath should be filled as high as possible resp. up to the maximum
level indication. After the external circuit has been filled up it may be necessary to add further liquid.
Level indication with red marks to determine maximum and minimum levels..
Link the pump connections at the back of the unit to the external circuit. Only pressure-tight circuits can be
connected to the chiller.
Switch off the unit before loosening the hose connections. The hose couplings do not close automatically!
ATTENTION:
In case of lock of the return pipe pressures which destroy glass equipment can occur near
devices with max. discharge pressure than 1 bar.
Observe the max. permissible pressures of the connected apparatus!!
Concerning suitable tube material please refer to Section 5
In the case of high-level external circuits, if the pump is stopped and air enters the chilling circuit there is a
possibility even in closed circuits that the external volume drains down and the storage bath overflows!
The dry running of the pump, i.e. operation below minimum liquid level can cause damage to the pump
bearings!
Always ensure maximum cross-section in the external circuit (nipples, tubing, external consuming device).
This results in a larger flow rate and therefore better temperature control.
Protect the tubes with hose clips against slipping off!
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