Technical data

BD / ED / FD 01/2006 page 31/49
If the safety device has assumed the regulation function (identifiable by the red alarm lamp (7a) lighting
up and, in case of the option acoustic alarm with activated buzzer (chap. 9.1), by the buzzer sounding),
proceed as follows:
• Disconnect the unit from the mains.
• Have the cause of the fault examined and rectified by a technician.
• Restart the unit (see chapter 6).
Adjustment:
To check the response temperature of the safety thermostat class 3.1, switch on the unit and set the
desired set point at the temperature controller.
The scale division from 1 to 10 corresponds to the temperature range from 0°C to 120°C (BD) or from
63°C to 350°C (ED or FD, option) and serves as a setting aid.
1. Turn the control knob (7) of the safety thermostat class 3.1 with
a coin to its end-stop (unit protection).
2. When the set point is reached, turn the control knob (7) to its
trip point (turn it anti-clockwise)
3. The trip point is identifiable by the red alarm lamp (7a) lighting
up.
With the option acoustic alarm and the buzzer activated (chap.
9.1), the buzzer sounds as an additional signal. It can be
switched off by switch (11).
4. The optimum setting for the safety thermostat class 3.1 is
obtained by turning the control knob clockwise by approximately
one scale division, which extinguishes the red alarm lamp (7a).
Check the safety thermostat with every change of the set point value and readjust it if
necessary.
9. Options
9.1 Disconnectable acoustic over-temperature alarm (option)
This option allows to activate an acoustic signal with the buzzer switch (11):
Position 0 = buzzer off
Position 1 = buzzer active
If the buzzer is activated, an acoustic signal sounds when the limit temperature set at the temperature
safety device class 2 (chap. 8.1) or class 3.1 (chap. 8.2) is exceeded, this happens in addition to the red
alarm pilot lamp (7a) lighting up. The buzzer can be switched off using the buzzer switch (11).
Switching off the acoustic alarm does not influence the safety device’s regulatory function.
Proceed as described in chap. 8.1 / 8.2.