Index: firmware/App/Modes/ModeHeatDisinfect.c
===================================================================
diff -u -r686acb428a08c632526ca35c8a0102ab22836bd0 -rac264e13479986e5db728ce6ba3c08cb1a871266
--- firmware/App/Modes/ModeHeatDisinfect.c	(.../ModeHeatDisinfect.c)	(revision 686acb428a08c632526ca35c8a0102ab22836bd0)
+++ firmware/App/Modes/ModeHeatDisinfect.c	(.../ModeHeatDisinfect.c)	(revision ac264e13479986e5db728ce6ba3c08cb1a871266)
@@ -2011,16 +2011,15 @@
  * The setNelsonSupportConditions function sets the disinfect variables for
  * Nelson support.
  * @details Inputs: nelsonSupport
- * @details Outputs: timeStatus, heatDisinfectState
+ * @details Outputs: timeStatus, heatDisinfectState, concPumpsStartTemperatureC
  * @return: none
  *************************************************************************/
 static void setNelsonSupportConditions( void )
 {
-    concPumpsStartTemperatureC = NELSON_SUPPORT_TARGET_TEMP_C;
-
     switch ( nelsonSupport )
     {
         case NELSON_INOCULATE:
+            concPumpsStartTemperatureC               = NELSON_SUPPORT_TARGET_TEMP_C;
             timeStatus[ RO_AT_77_C ].startTempC      = NELSON_SUPPORT_TARGET_TEMP_C;
             timeStatus[ RO_AT_77_C ].startTimeMS     = 0;
             timeStatus[ RO_AT_77_C ].stopTempC       = NELSON_SUPPORT_STOP_TEMP_C;
@@ -2047,6 +2046,7 @@
             break;
 
         case NELSON_POS_CONTROL_HEAT_DISINFECT:
+            concPumpsStartTemperatureC               = NELSON_SUPPORT_TARGET_TEMP_C;
             timeStatus[ RO_AT_77_C ].startTempC      = NELSON_SUPPORT_TARGET_TEMP_C;
             timeStatus[ RO_AT_77_C ].startTimeMS     = 0;
             timeStatus[ RO_AT_77_C ].stopTempC       = NELSON_SUPPORT_STOP_TEMP_C;
Index: firmware/App/Services/SystemComm.c
===================================================================
diff -u -rb549cc9586c585902f891e1aac5e59b7de445f71 -rac264e13479986e5db728ce6ba3c08cb1a871266
--- firmware/App/Services/SystemComm.c	(.../SystemComm.c)	(revision b549cc9586c585902f891e1aac5e59b7de445f71)
+++ firmware/App/Services/SystemComm.c	(.../SystemComm.c)	(revision ac264e13479986e5db728ce6ba3c08cb1a871266)
@@ -50,7 +50,7 @@
 #define MAX_COMM_CRC_FAILURE_WINDOW_MS  (10 * SEC_PER_MIN * MS_PER_SECOND)  ///< CRC error window
 
 #define MSG_NOT_ACKED_TIMEOUT_MS        150                                 ///< maximum time for a Denali message that requires ACK to be ACK'd
-#define MSG_NOT_ACKED_MAX_RETRIES       3                                   ///< maximum number of times a message that requires ACK that was not ACK'd can be re-sent before alarm
+#define MSG_NOT_ACKED_MAX_RETRIES       8                                   ///< maximum number of times a message that requires ACK that was not ACK'd can be re-sent before alarm
 #define PENDING_ACK_LIST_SIZE           25                                  ///< maximum number of Delanli messages that can be pending ACK at any given time
 
 #define MAX_FPGA_CLOCK_SPEED_ERRORS             3                           ///< maximum number of FPGA clock speed errors within window period before alarm