BD / ED / FD (E2) 11/2010 page 31/54
If the safety device has assumed the regulation function (identifiable by the red alarm lamp (7a) lighting
up and, in case of the option audible alarm with activated buzzer (chap. 8.1), by the buzzer sounding),
proceed as follows:
•
Disconnect the unit from the power supply.
• Have the cause of the fault examined and rectified by a technician.
• Restart the unit (see chapter 5).
Adjustm
ent:
To check the response temperature of the safety thermostat class 3.1, turn on the unit and set the
desired set point on the temperature controller.
The scale division from 1 to 10 corresponds to the temperature range from 0 °C / 32 °F to 120 °C / 248 °F
(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 audible alarm and the buzzer activated (chap.
8.1), the buzzer sounds as an additional signal. It can be turned
off by s
witch (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.
8. Options
8.1 Disconnectable audible over-temperature alarm (option)
This option permits activating an audible signal with the buzzer switch (11):
Position 0 = buzzer off
Position 1 = buzzer active
If the buzzer is activated, an audible signal sounds when the limit temperature set at the temperature
safety device class 2 (chap. 7.1) or class 3.1 (chap. 7.2) is exceeded, this happens in addition to the red
alarm pilot lamp (7a) lighting up. The buzzer can be turned off using the buzzer switch (11).
Turning off the audible alarm does not influence the safety device’s regulatory function.
Proceed as described in chap. 7.1 / 7.2.
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