KBW (E6) 11/2016 page 110/147
17. Defrosting at refrigerating operation
BINDER growth chambers with light are very diffusion-proof. To ensure high temperature precision there
is no automatic cyclic defrosting device. The DCT™ refrigerating system largely avoids icing of the evapo-
ration plates. However, at very low temperatures the moisture in the air can condense on the evaporator
plates leading to icing.
Always close the door properly.
Operation with temperature set-points above +5 °C / 41 °F at an ambient temperature of 25 °C / 77
°F:
The air defrosts the ice cover automatically. Defrosting is continually performed.
Operation with temperature set-points below +5 °C / 41 °F:
Icing on the evaporator is possible. Defrost the chamber manually.
With temperature set-points < +5 °C / 41 °F, regularly defrost the chamber manually:
• Set the temperature to 40 °C / 104 °F (in Fixed value entry mode).
• Let the chamber operate for approx. 30 minutes with the door closed.
Too much ice on the evaporator is noticeable by reduced refrigerating performance.
When turning off the chamber following prolonged refrigerating operation below +5 °C / 41 °F, there is
danger of overflowing due to uncontrolled defrosting of icing on the evaporator.
CAUTION
Uncontrolled defrosting of icing on the evaporator.
Danger of overflowing.
After several days of refrigerating operation below +5 °C / 41 °F:
∅ Do NOT directly turn off the chamber.
Manually defrost the chamber (see description above).
Then shut down the chamber at the main power switch (1).
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