STT 800
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 (149°F).
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 (176°F)
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.
6.4. Pre air cooler (optional)
The pre air cooler reduces the pre air temperature to a defined value. The pre air temperature is set at the operation panel. Pre air temperature is continuously monitored; the pre air cooler is acti- vated only when needed. If the pre air temperature exceeds the set value (e.g. due to interruption in the cooling water supply or soiling), an alarm message is given.
The pre air cooler can be connected to a coolant circuit or to the water mains network.
Functional description
