Index: firmware/App/Modes/Prime.c
===================================================================
diff -u -rf9570a9717805d0759622da836a33ee04f3fa40f -r2991b6731ff88740f29ea2f19411115d4f8a4aa4
--- firmware/App/Modes/Prime.c	(.../Prime.c)	(revision f9570a9717805d0759622da836a33ee04f3fa40f)
+++ firmware/App/Modes/Prime.c	(.../Prime.c)	(revision 2991b6731ff88740f29ea2f19411115d4f8a4aa4)
@@ -14,7 +14,6 @@
 * @date    (original)  08-Dec-2020
 *
 ***************************************************************************/
-
 #include "AirTrap.h"
 #include "AlarmMgmt.h"
 #include "BloodFlow.h"
@@ -52,7 +51,8 @@
 #define DIALYZER_VOLUME_SCALE_FACTOR                        0.5F                                               ///< Half of the dialyzer total volume.
 
 #define NO_AIR_DETECTED_COUNT                               ( 20 * MS_PER_SECOND )                             ///< No air detected time period count.
-#define PURGE_AIR_TIME_OUT_COUNT                            ( 120 * MS_PER_SECOND )                            ///< Time period count for purge air time out.
+#define PURGE_AIR_TIME_OUT_COUNT                            ( 60 * MS_PER_SECOND )                             ///< Time period count for purge air time out.
+#define PRIME_SALINE_DIALYZER_TIME_OUT_COUNT                ( 60 * MS_PER_SECOND )                             ///< Time period count for prime saline dialyzer time out.
 #define LOAD_CELL_STEADY_VOLUME_SAMPLING_TIME               (  1 * MS_PER_SECOND )                             ///< Time load cell reading steady state detection sampling time in seconds.
 #define PRIME_DIALYSATE_BYPASS_TIME_LIMIT                   ( 15 * MS_PER_SECOND )                             ///< Time limit for priming dialysate bypass circuit.
 #define STEADY_VOLUME_COUNT_SEC                             ( 10000 / LOAD_CELL_STEADY_VOLUME_SAMPLING_TIME )  ///< Counter must be greater than 10 seconds before steady volume is true.
@@ -732,6 +732,11 @@
         state = HD_PRIME_RESERVOIR_TWO_FILL_COMPLETE_STATE;
     }
 
+    if ( TRUE == didTimeout( primeSalineDialyzerStartTime, PRIME_SALINE_DIALYZER_TIME_OUT_COUNT ) )
+    {
+         activateAlarmNoData( ALARM_ID_PRIME_SALINE_DIALYZER_TIME_OUT ); // Trigger HD prime saline dialyzer time out alarm.
+    }
+
     if ( TRUE == doesAlarmStatusIndicateStop() )
     {
         setupForPrimePause();