6.3. Return air cooler (optional)
F
A return air cooler is generally required in cases in which the return air
temperature is over 65 °C.
A return air cooler improves the efficiency of the drying cells.
The return air cooler reduces the return air temperature to a defined value.
The return air temperature is set at the operation panel.
&
The lower the value chosen for the return air temperature, the better the
efficiency of the drying cells.
The dryer is automatically switched off if temperature exceeds 80 °C.
Return air temperature is continuously monitored; the return air cooler is activated only when nee-
ded. If the return air temperature exceeds the set value (e.g. due to interruption in the cooling wa-
ter supply or soiling), an alarm message is given.
The return air cooler can be connected to a coolant circuit or to the water mains network.
64.10-0233GB01
11/02
CTT 1600
Functional description 6-4
