Proline Low-temperature Thermostats
YACE0072 / 21.08.07
Preparation
21
6.2
Filling and draining
Filling
−
Close the drain cock.
−
Carefully remove all residues of the previous
heat carrier liquid (blow dry and remove screw
plugs!).
−
Maximum filling level is up to 10 mm below
the top edge of the bath. Overfilling leads to
the display of the warning
VW@pl0/2
(
Ì
−
Best operation is with a level 20-80 mm below
the top edge of the bath.
−
The cooling pipe of the evaporator should be
covered. Depending on the operation up to
three pipe windings might be uncovered.
−
Low-level cut-off occurs at about 95 mm
below the top edge of the bath.
−
The units are designed for use with non-flammable and flammable liquids to
DIN EN 61010-2-010. Flammable liquids must not be used higher than 25°C below the
fire point (
Ì
Section 6.3).
−
When using heat carrier oils note that they expand on heating (approx. 8%/ 100°C).
−
With enclosed external loads, the overall expansion takes place in the bath.
−
Ensure that with the connection of an external load, the liquid level does not drop
impermissibly due to filling the load
Æ
top up with liquid if necessary.
−
Set the upper and lower temperature limits (
Ì
7.8.3) in accordance with the limits of the
heat carrier liquid in use.
Draining
−
Switch off the thermostat withdraw the mains plug.
−
Let out the heat carrier liquid through the drain cock; fit
a hose when doing this.
−
On thermostats, the drain cock is located behind the
front panel.
−
Follow the regulations for the disposal of used heat carrier liquid.
Do not drain heat carrier liquid when hot or at bath temperatures below 0°C!
Drain cock