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BD / ED / FD (E2) 03/2019 page 18/68
5.3 Air change
Opening the air flap in the exhaust duct serves to adjust the
air change.
Without connecting a suction plant:
• For BD and ED chambers fresh air circulation can be
elevated using the exhaust duct. The air flap in the
exhaust duct serves to adjust the fresh air entry.
• For FD chambers with the air flap open and the fan
operating, fresh air comes in via aeration gaps.
• If the air flap is completely open, the spatial temperature
accuracy can be negatively influenced.
Figure 5: Adjusting the air flap
6. Operating the controller
Controller setting is identical with all three chambers BD, ED, and FD. The temperature controllers only
differ in their temperature range (BD: up to 100 °C / 212 °F, ED/FD: up to 300 °C / 572 °F ) and the
displayed accuracy (BD: a tenth of a degree, ED/FD: one degree).
6.1 Display / entry of temperature set-point (without ramp function)
The chamber is operating, the controller is in normal display (actual value
display). The actual temperature value (example: 22 °C) is displayed:
1. Press button
The display shows alternately “SP” and the previous temperature set-point (example: 60 °C):
2. With the buttons enter a set-point value between 0 and 300.
The desired temperature set-point can be selected in a temperature range from 5 °C / 9 °F
above room temperature up to 100 °C / 212 °F (BD) or 300 °C / 572 °F (ED/FD).
3. Wait 2
seconds until the entered temperature value is taken over (display flashing once).
4. Press button to return to normal display (actual value display) (automatically after approx. 30
seconds).
Adjust the safety device following any changes of the set-point (chap. 7).
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