JULABO LH 50 Highly Dynamic Temperature Control Systems - Manual (Page 35)

35
5.9. Draining
Notice :
 Do not drain the bath fluid while it is hot or cold !
Check the temperature of the bath fluid prior to draining (by switching the unit on
for a short moment, for example).
 Store and dispose the used bath fluid according to the laws for environmental
protection.
S 20.00
P x.xx
Pump
>Pump OFF
Mode: drain
ALARM
CODE 14
 Turn on the temperature system with the mains power
switch or
press the stop key to make the unit enter the STOP-
MODE.
 In the submenu >Pump<, set the menu items >Mode< to
>drain<.
(see page 33 Adjusting Mode: )

The reset to another mode can only take place after the
next filling.
Reason: During the >ALARM – CODE 14< there is no
possibility for access to the menu functions !
 Pull the venting grid (8.1) to the front and remove.
 Place a suitable vessel (8.2) for accepting the used bath
liquid underneath the drain.
 Slide a short piece of tubing onto the drain port and hold
the end into the vessel.
 Unscrew the drain screw by some turns.
The LH50 has two drain screws. Both have to be used.
 The liquid level in the unit falls.
Now the VFD-Display of the unit should show low level,
WARNING >CODE 40< and then ALARM >CODE 14<.
Press enter to quit the audible signal.

Drain the external system:
At the upper nozzle of the external system, disconnect the
tubing to the pump connector "return" (14) until an air
stream moves in.
(see sketch on page 28)
 Tighten the drain screw after draining the unit.
The internal reservoir should additionally be emptied via the
connection for the expansion vessel (16) on the rear side of
the temperature system.
(Cleaning the unit see page 72)