Binder VD 53 - Page 52

VD (E2.1) 07/2017 page 52/96
Function:
The safety device is functionally and electrically independent of the temperature control device and turns
off the chamber at all poles.
If you turn the control knob (2) to its end-stop (position 10), the safety device will protect the appliance. If
you set it to a temperature a little above the set-point temperature, it will protect the charging material.
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. 4.4.
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° / 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) (chamber 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 11: Setting the safety
device class 2
The chamber 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.
Function check:
Check the temperature safety device class 2 at appropriate intervals for its functionality. It is
recommended that the authorized operating personnel should perform such a check, e.g., before starting
a longer work procedure.