Index: firmware/App/Services/PIControllers.c
===================================================================
diff -u -rab6ac1bb140201e5737d594b3456038ea9e4725f -ra504d6899e709d7432af9c055db1bd1fe340d032
--- firmware/App/Services/PIControllers.c	(.../PIControllers.c)	(revision ab6ac1bb140201e5737d594b3456038ea9e4725f)
+++ firmware/App/Services/PIControllers.c	(.../PIControllers.c)	(revision a504d6899e709d7432af9c055db1bd1fe340d032)
@@ -54,9 +54,10 @@
 /// PI Controllers -- initial configurations.
 static PI_CONTROLLER_T piControllers[ NUM_OF_PI_CONTROLLERS_IDS ] =
 {   // Kp   Ki  uMax  uMin  ref meas  err  esw esum ctrl
+
     { 0.0, 0.0, 1.0,  0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 },  // PI_CONTROLLER_ID_RO_PUMP
-    { 0.0, 0.0, 1.0,  0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 },  // PI_CONTROLLER_ID_PRIMARY_HEATER
-    { 0.0, 0.0, 0.25, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 }   // PI_CONTROLLER_ID_TRIMMER_HEATER
+    { 0.0, 0.0, 0.89, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 },  // PI_CONTROLLER_ID_PRIMARY_HEATER
+    { 0.0, 0.0, 0.50, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 }   // PI_CONTROLLER_ID_TRIMMER_HEATER
 };
 
 /*********************************************************************//**