The operating temperature was on 2013 around 320-340ºC* then increased on 2014 up to 360ºC; on 2015-2016 was around 340ºC and after Ocotober 2016 was 350ºC. All of these are far from the design operating temperature that is 385ºC. I checked if there were temperatures upsets after October 2016 and this temperature went up to 385ºC for 6 times but just after 20min it normalized to 350-360ºC.
The temperature changed for operation purpose.