Operating Manual DTT 6801 Multicontroller (MC) 086100037 © Pfannenberg GmbH Page 12 / 49
2.4.7 Condensate management
Damaged switch cabinet seals impair the function of the unit.
Regular inspection of the seals assures protection against heavy condensate accumulation.
Installation of a door contact switch reduces the accumulation of condensate when the switch cabinet is
open.
The main feature of DTT cooling units is the re-positioning of the cooling circuits. The cold circuit (1) is at the top
and the hot circuit (5) is at the bottom. No cold bridging (2) can occur in the switch cabinet (3) and, therefore, no
condensate accumulates in the switch cabinet interior (4); see the figure Cooling circuits.
The evaporator unit (6) is situated in the upper section of the DTT cooling unit, so vertical drainage of
condensate water is possible. The condensate water does not come into contact with the switch cabinet. For
safety reasons, there is a drain port with drain hose on the condensate evaporator (7).
Accumulating condensate is collected by a condensate collecting bottle. It is available as an accessory.
Always specify the part number when ordering accessories, see ordering spare parts and accessory parts.
• Hot air that meets the evaporator in concentrated form causes condensate water. The hot air (9) is distributed
over a wide area on the evaporator (8) in the DTT cooling unit. Reduction of the air speed in this manner
prevents turbulence, so the air flow (10) towards the switch cabinet is free from condensate.
• DTT cooling units have air outlet nozzles (11) arranged on both sides instead of air hoses. These air outlet
nozzles (11) accelerate the cold air (10) and guide it to the switch cabinet floor free from condensate; see the
figure Air cooling.
Figure 11 - Condensate drainage
Figure10 – Cooling circuit arrangement
Figure 12 - Evaporator function
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