JULABO F34-EH Refrigerated and Heating Circulators - Manual (Page 24)

Operating procedures
24
Caution: F12
If the circulator is turned off with the mains switch (1a), the refrigerating unit is
not switched off simultaneously.
Turn off the refrigerating unit with the mains switch (1b) as well.
Danger of freezing when water is used as bath fluid!
Note: Shorten heat-up time
Whenever cooling is not required because the actual working
temperature value is increased by >30 °C for example, turn off the
refrigeration unit with the mains switch (1b).
In such case, model combinations connected with the control cable
(15) intermittently indicate the message E 21. As soon as the
desired bath temperature is reached, turn on the refrigeration unit
with the mains switch (1b) again and the message E 21 disappears.
6.3. Automatic / non-automatic start mode

Keep depressed the key and

turn on the circulator with the mains power switch.
For a short while the LED temperature DISPLAY indicates the
effective start mode:

AUTOSTART on.

AUTOSTART off.
NOTE:
The circulator has been configured and supplied by JULABO
according to N.A.M.U.R. recommendations. This means for the start
mode, that the unit must enter a safe operating state after a power
failure (non-automatic start mode). This safe operating state is
indicated by „OFF“ on the LED temperature display. A complete
shutdown of the main functional elements such as heater and
circulating pump is effected simultaneously.
Should such a safety standard not be required, the AUTOSTART
function (automatic start mode) may be activated, thus allowing the
start of the circulator directly by pressing the mains power switch or
using a timer.
Warning:
For supervised or unsupervised operation with the AUTOSTART function, avoid
any hazardous situation to persons or property.
The circulator does no longer conform to N.A.M.U.R. recommendations.
Please make sure that all safety devices of the unit have been set properly.