BINDER VD 23 - Manual (Page 73)

VDL (E2.1) 04/2014 page 73/107
If the safety device has turned off the oven, identifiable by the red alarm lamp (2a) lighting up, proceed as
follows:
•
Disconnect the oven from the power supply
• Have an expert examine and rectify the cause of the fault
• Release the safety device by pressing the reset button (2b)
• Restart the oven as described in chap. 4.5.
Adjustment:
To check the response temperature of the safety device, turn on the chamber and set the desired set
point on the temperature controller.
The scale division from 1 to 10 corresponds to the temperature range from 30 °C / 86°F up to 320 °C /
608°F and serves as a setting aid.
• Turn the control knob (2) of the safety device using a coin to its
end-stop (position 10) (unit protection).
• When the set point is reached, turn back the control knob (2) until
its trip point (turn it counter-clockwise) is reached.
• The red alarm lamp (2a) lighting up identifies the trip point; and the
reset button (2b) pops out.
• The optimum setting of the safety device is obtained by turning the
knob clockwise by approx. one graduation mark on the scale.
• Push the reset button (2b) in again.
Figure 17: Setting the safety
device class 2
The unit is only active when the reset button (2b) is pushed in.
When the safety device responds, the red alarm lamp (2a) illuminates, the reset button (2b) pops out, and
the oven is turned off permanently at all poles.
Check the setting regularly and adjust it following changes of the set-point or charge.
Example:
A substance with an ignition temperature of 160 °C shall be dried.
The maximum allowed drying temperature is 85 °C according to the information panel
“Temperature setting” at the front of the unit (chap. 2.5). Set the temperature safety device
to a temperature of 85 °C max.
Also, the setting on the controller RD3 must not exceed this value.
According to IEC/CEI 60079-14 this unit is not designated for the temperature classes T4, T5, and T6.
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.
DANGER
Explosion hazard.
Danger of death.
∅
Do NOT introduce any substance with an ignition temperature #135 °C / 275°F into the
oven.