Index: firmware/App/Modes/ModeHeatDisinfect.h
===================================================================
diff -u -r1440a4a2be8d12edebd405a20807882e5d32d619 -r72bca5d2e489fa253f3bdfdb254261a32c7a0c19
--- firmware/App/Modes/ModeHeatDisinfect.h	(.../ModeHeatDisinfect.h)	(revision 1440a4a2be8d12edebd405a20807882e5d32d619)
+++ firmware/App/Modes/ModeHeatDisinfect.h	(.../ModeHeatDisinfect.h)	(revision 72bca5d2e489fa253f3bdfdb254261a32c7a0c19)
@@ -36,21 +36,38 @@
 {
     U32 heatDisinfectTargetTime;        ///< Target time to heat disinfect.
     U32 ro77CountdownTimeS;             ///< Heat disinfect RO 77 count down time in seconds.
-    U32 ro82CountdownTimeS;             ///<
-    U32 r77CountdownTimeS;
-    U32 r82CountdownTimeS;
+    U32 ro82CountdownTimeS;             ///< Heat disinfect RO 82 count down time in seconds.
+    U32 r77CountdownTimeS;              ///< Heat disinfect reservoir 77 count down time in seconds.
+    U32 r82CountdownTimeS;              ///< Heat disinfect reservoir 82 count down time in seconds.
 } MODE_HEAT_DISINFECT_UI_DATA_T;
 
+#ifndef _RELEASE_
+typedef enum Nelson_States
+{
+    NELSON_NONE = 0,                    ///< Nelson none.
+    NELSON_INOCULATE,                   ///< Nelson inoculate.
+    NELSON_HEAT_DISINFECT,              ///< Nelson heat disinfect.
+    NELSON_POS_CONTROL_CHEM_DISINFECT,  ///< Nelson positive control chemical disinfect.
+    NELSON_CHEM_DISINFECT,              ///< Nelson chemical disinfect.
+    NELSON_DRAIN_SAMPLES,               ///< Nelson drain sample.
+    NUM_OF_NELSON_SUPPORT               ///< Number of Nelson supports.
+} NELSON_SUPPORT_T;
+#endif
+
 // ********** public function prototypes **********
 
 void initHeatDisinfectMode( void );                                 // Initialize this module
-U32 transitionToHeatDisinfectMode( void );                         // Prepares for transition to heat disinfect mode
+U32 transitionToHeatDisinfectMode( void );                          // Prepares for transition to heat disinfect mode
 U32  execHeatDisinfectMode( void );                                 // Execute the heat disinfect mode state machine (call from OperationModes)
 
 DG_HEAT_DISINFECT_STATE_T getCurrentHeatDisinfectState( void );     // get the current state of the heat disinfect mode
 
 BOOL stopDGHeatDisinfect( void );                                   // Stop DG heat disinfect
 
+#ifndef _RELEASE_
+void setNelsonSupportMode( NELSON_SUPPORT_T support );
+#endif
+
 /**@}*/
 
 #endif