BINDER MK 115 - Manual (Page 79)

MKF + MKFT (E3.1) 07/2014 page 79/114
15. Defrosting at refrigerating operation
BINDER alternating climate chambers are very diffusion-proof. To ensure high temperature precision
there is no automatic cyclic defrosting device. 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 20 °C /
68 °F:
The air defrosts the ice cover automatically. Defrosting is continually performed.
Operation with temperature set-points below +5 °C / 41 °F or in the discontinuous range (chap.
14):
The evaporator can cover with ice. Defrost the unit manually.
With temperature set-points below +5 °C / 41 °F, regularly defrost the unit manually:
•
Set the humidity to 0 % r.H. and turn on the humidifying system at humidity switch (4).
• Set the temperature to 60 °C / 140 °F (Manual Mode).
• Let the unit operate for approx. 1 hour with the door closed.
Too much ice on the evaporator is noticeable by reduced refrigerating performance.
When turning off the unit following prolonged refrigerating below +5 °C / 41 °F, there is danger of over-
flowing 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 below +5 °C / 41 °F:
∅
Do NOT directly turn off the unit.
 Manually defrost the unit (see description above).
 Then, shut down the unit at the main power switch (3) and close the tap of the water
supply.