BINDER VD 23 - Manual (Page 28)

VDL (E2.1) 04/2014 page 28/107
2.5 “Temperature setting” information panel
(ignition temperature vs. drying temperature)
This information panel is mounted to
the door of the VDL vacuum drying
oven and shows the maximum per-
missible drying temperature depend-
ing on the ignition temperature of the
solvent.
The reading graph reflects the fact
that the inner chamber walls will be-
come warmer than the expansion
racks, especially during the heating-
up phase, and will thereby exceed the
set-point temperature.
Temperatureinstellung VDL
Adjustment of temperature VDL
Ajustement de température VDL
Figure 9: Temperature setting information panel
You must observe the indicated safety margin between ignition temperature and drying tem-
perature.
According to IEC 60079-14, you must introduce only substances with an ignition temperature which is
higher than 135 °C / 275°F. This unit is NOT suitable to dry substances with an ignition temperature
below 135 °C / 275°F.
If the ignition temperature of a solvent contained in the drying material is exceeded during the drying pro-
cess, there is an immediate risk of fire and explosion.
DANGER
Exceeding the ignition temperature of a solvent.
Risk of fire and explosion.
Danger of death.
∅
The ignition temperature of a contained solvent must NEVER be reached. For safety
reasons, always ensure that there is a safety margin.
Required measures:
•
Determine the maximum drying temperature in relation to the ignition temperature of the
solvent in accordance with the “Temperature setting” information panel (chap. 2.5). Do NOT
exceed this temperature when presetting the set-point temperature at the temperature con-
troller RD3.
• Before starting the drying process, set the temperature safety device to the allowed maxi-
mum drying temperature according to the information panel “temperature setting” chap.
2.5), so that even in the event of error or incorrect increase of the temperature set-point on
the RD3 controller the maximum permissible drying temperature is not exceeded. It is NOT
sufficient to directly adjust the maximum temperature of the temperature safety device to
the maximum temperature of the solvent’s temperature class.
• (continued)