Operating instructions

3.3. 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 needed. If the return air temperature exceeds the set value
(e.g. due to interruption in the cooling water 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.
CTT 300
Functional description 3-4