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13-4
Installation Notes
13.2 Instructions for Using Cooling Units in Control Cabinets
Damage by Condensation
Damage by Condensate
Correct Use of Cooling Units
Avoiding Condensation
Avoiding Drips and Sprays
To maintain ambient conditions in control cabinets, it may be necessary to
cool the air inside the control cabinet with a cooling unit.
Improperly used cooling units can cause damage to the installed
controllers because of condensation and condensate!
Warm, damp air enters the control cabinet and condensation collects on
the control units during cooling!
If cooling units are poorly arranged, the condensate that is continually
produced by the cooling units can drip into control units or be sprayed
inside them by the cool air stream.
Use cooling units only with well-insulated control cabinets, to avoid
condensation due to warm, damp outside air!
If the control cabinets are being used with open doors (initial startup,
service, etc.), ensure that the control units can never be cooler than the
air in the control cabinet after the doors are closed, otherwise
condensation can occur. The cooling unit must continue to be operated
even when the system is turned off, until the temperature of the air in the
control cabinet and the installed equipment remains at the same level.
Set cooling units with a fixed temperature setting to not lower than 40º C!
Set cooling units with adjustable temperature setting so that the inside air
temperature of the control cabinet is not below that of the outside
temperature. Set temperature limit to 40º C!
Arrange cooling units so that any condensate cannot drip into or on the
installed control units.
Cooling units on the top of the control cabinet require a specialized control
cabinet construction (see Fig. 13-1).
The control cabinet should be constructed so that the fan for the cooling
unit cannot spray the condensate that collects after the unit has been
turned off for a period of time on the control units (see Fig. 13-2).
Note:
No water must be allowed to drip on the installed control units!
Furthermore, the correct temperature of the cooling units must
be observed!
CLM01.4-LAP-01VRS
DOK-CONTRL-CLM01.4LAP1-FK01-EN-P
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